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 wpa_driver_nl80211_data *drv;
  62         struct i802_bss *next;
  63         int ifindex;
  64         char ifname[IFNAMSIZ + 1];
  65         unsigned int beacon_set:1;
  66 };
  67
  68 struct wpa_driver_nl80211_data {
  69         void *ctx;
  70         struct netlink_data *netlink;
  71         int ioctl_sock; /* socket for ioctl() use */
  72         char brname[IFNAMSIZ];
  73         int ifindex;
  74         int if_removed;
  75         struct wpa_driver_capa capa;
  76         int has_capability;
  77
  78         int operstate;
  79
  80         int scan_complete_events;
  81
  82         struct nl_handle *nl_handle;
  83         struct nl_handle *nl_handle_event;
  84         struct nl_cache *nl_cache;
  85         struct nl_cache *nl_cache_event;
  86         struct nl_cb *nl_cb;
  87         struct genl_family *nl80211;
  88
  89         u8 auth_bssid[ETH_ALEN];
  90         u8 bssid[ETH_ALEN];
  91         int associated;
  92         u8 ssid[32];
  93         size_t ssid_len;
  94         int nlmode;
  95         int ap_scan_as_station;
  96         unsigned int assoc_freq;
  97
  98         int monitor_sock;
  99         int monitor_ifidx;
 100         int probe_req_report;
 101         int disable_11b_rates;
 102
 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         struct i802_bss first_bss;
 115
 116 #ifdef HOSTAPD
 117         int eapol_sock; /* socket for EAPOL frames */
 118
 119         int default_if_indices[16];
 120         int *if_indices;
 121         int num_if_indices;
 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 int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 143 static int wpa_driver_nl80211_if_remove(void *priv,
 144                                         enum wpa_driver_if_type type,
 145                                         const char *ifname);
 146 #endif /* HOSTAPD */
 147
 148 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
 149                                                         void *timeout_ctx);
 150 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
 151                                      int ifindex, int disabled);
 152
 153
 154 /* nl80211 code */
 155 static int ack_handler(struct nl_msg *msg, void *arg)
 156 {
 157         int *err = arg;
 158         *err = 0;
 159         return NL_STOP;
 160 }
 161
 162 static int finish_handler(struct nl_msg *msg, void *arg)
 163 {
 164         int *ret = arg;
 165         *ret = 0;
 166         return NL_SKIP;
 167 }
 168
 169 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 170                          void *arg)
 171 {
 172         int *ret = arg;
 173         *ret = err->error;
 174         return NL_SKIP;
 175 }
 176
 177
 178 static int no_seq_check(struct nl_msg *msg, void *arg)
 179 {
 180         return NL_OK;
 181 }
 182
 183
 184 static int send_and_recv(struct wpa_driver_nl80211_data *drv,
 185                          struct nl_handle *nl_handle, struct nl_msg *msg,
 186                          int (*valid_handler)(struct nl_msg *, void *),
 187                          void *valid_data)
 188 {
 189         struct nl_cb *cb;
 190         int err = -ENOMEM;
 191
 192         cb = nl_cb_clone(drv->nl_cb);
 193         if (!cb)
 194                 goto out;
 195
 196         err = nl_send_auto_complete(nl_handle, msg);
 197         if (err < 0)
 198                 goto out;
 199
 200         err = 1;
 201
 202         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 203         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 204         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 205
 206         if (valid_handler)
 207                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 208                           valid_handler, valid_data);
 209
 210         while (err > 0)
 211                 nl_recvmsgs(nl_handle, cb);
 212  out:
 213         nl_cb_put(cb);
 214         nlmsg_free(msg);
 215         return err;
 216 }
 217
 218
 219 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 220                               struct nl_msg *msg,
 221                               int (*valid_handler)(struct nl_msg *, void *),
 222                               void *valid_data)
 223 {
 224         return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
 225                              valid_data);
 226 }
 227
 228
 229 struct family_data {
 230         const char *group;
 231         int id;
 232 };
 233
 234
 235 static int family_handler(struct nl_msg *msg, void *arg)
 236 {
 237         struct family_data *res = arg;
 238         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 239         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 240         struct nlattr *mcgrp;
 241         int i;
 242
 243         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 244                   genlmsg_attrlen(gnlh, 0), NULL);
 245         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 246                 return NL_SKIP;
 247
 248         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 249                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 250                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 251                           nla_len(mcgrp), NULL);
 252                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 253                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 254                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 255                                res->group,
 256                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 257                         continue;
 258                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 259                 break;
 260         };
 261
 262         return NL_SKIP;
 263 }
 264
 265
 266 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 267                                const char *family, const char *group)
 268 {
 269         struct nl_msg *msg;
 270         int ret = -1;
 271         struct family_data res = { group, -ENOENT };
 272
 273         msg = nlmsg_alloc();
 274         if (!msg)
 275                 return -ENOMEM;
 276         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 277                     0, 0, CTRL_CMD_GETFAMILY, 0);
 278         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 279
 280         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 281         msg = NULL;
 282         if (ret == 0)
 283                 ret = res.id;
 284
 285 nla_put_failure:
 286         nlmsg_free(msg);
 287         return ret;
 288 }
 289
 290
 291 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 292 {
 293         struct i802_bss *bss = priv;
 294         struct wpa_driver_nl80211_data *drv = bss->drv;
 295         if (!drv->associated)
 296                 return -1;
 297         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 298         return 0;
 299 }
 300
 301
 302 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 303 {
 304         struct i802_bss *bss = priv;
 305         struct wpa_driver_nl80211_data *drv = bss->drv;
 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->first_bss.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->first_bss.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->first_bss.ifindex = if_nametoindex(drv->first_bss.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->first_bss,
 875                                             IEEE80211_MODE_AP);
 876                 drv->ap_scan_as_station = 0;
 877         }
 878
 879         switch (gnlh->cmd) {
 880         case NL80211_CMD_TRIGGER_SCAN:
 881                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 882                 break;
 883         case NL80211_CMD_NEW_SCAN_RESULTS:
 884                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 885                 drv->scan_complete_events = 1;
 886                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 887                                      drv->ctx);
 888                 send_scan_event(drv, 0, tb);
 889                 break;
 890         case NL80211_CMD_SCAN_ABORTED:
 891                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 892                 /*
 893                  * Need to indicate that scan results are available in order
 894                  * not to make wpa_supplicant stop its scanning.
 895                  */
 896                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 897                                      drv->ctx);
 898                 send_scan_event(drv, 1, tb);
 899                 break;
 900         case NL80211_CMD_AUTHENTICATE:
 901         case NL80211_CMD_ASSOCIATE:
 902         case NL80211_CMD_DEAUTHENTICATE:
 903         case NL80211_CMD_DISASSOCIATE:
 904         case NL80211_CMD_ACTION:
 905         case NL80211_CMD_ACTION_TX_STATUS:
 906                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 907                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
 908                            tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
 909                            tb[NL80211_ATTR_COOKIE]);
 910                 break;
 911         case NL80211_CMD_CONNECT:
 912         case NL80211_CMD_ROAM:
 913                 mlme_event_connect(drv, gnlh->cmd,
 914                                    tb[NL80211_ATTR_STATUS_CODE],
 915                                    tb[NL80211_ATTR_MAC],
 916                                    tb[NL80211_ATTR_REQ_IE],
 917                                    tb[NL80211_ATTR_RESP_IE]);
 918                 break;
 919         case NL80211_CMD_DISCONNECT:
 920                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 921                         /*
 922                          * Avoid reporting two disassociation events that could
 923                          * confuse the core code.
 924                          */
 925                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 926                                    "event when using userspace SME");
 927                         break;
 928                 }
 929                 drv->associated = 0;
 930                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 931                 break;
 932         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 933                 mlme_event_michael_mic_failure(drv, tb);
 934                 break;
 935         case NL80211_CMD_JOIN_IBSS:
 936                 mlme_event_join_ibss(drv, tb);
 937                 break;
 938         case NL80211_CMD_REMAIN_ON_CHANNEL:
 939                 mlme_event_remain_on_channel(drv, 0, tb);
 940                 break;
 941         case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
 942                 mlme_event_remain_on_channel(drv, 1, tb);
 943                 break;
 944         default:
 945                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 946                            "(cmd=%d)", gnlh->cmd);
 947                 break;
 948         }
 949
 950         return NL_SKIP;
 951 }
 952
 953
 954 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 955                                              void *sock_ctx)
 956 {
 957         struct nl_cb *cb;
 958         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 959
 960         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 961
 962         cb = nl_cb_clone(drv->nl_cb);
 963         if (!cb)
 964                 return;
 965         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 966         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 967         nl_recvmsgs(drv->nl_handle_event, cb);
 968         nl_cb_put(cb);
 969 }
 970
 971
 972 /**
 973  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 974  * @priv: driver_nl80211 private data
 975  * @alpha2_arg: country to which to switch to
 976  * Returns: 0 on success, -1 on failure
 977  *
 978  * This asks nl80211 to set the regulatory domain for given
 979  * country ISO / IEC alpha2.
 980  */
 981 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 982 {
 983         struct i802_bss *bss = priv;
 984         struct wpa_driver_nl80211_data *drv = bss->drv;
 985         char alpha2[3];
 986         struct nl_msg *msg;
 987
 988         msg = nlmsg_alloc();
 989         if (!msg)
 990                 return -ENOMEM;
 991
 992         alpha2[0] = alpha2_arg[0];
 993         alpha2[1] = alpha2_arg[1];
 994         alpha2[2] = '\0';
 995
 996         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 997                     0, NL80211_CMD_REQ_SET_REG, 0);
 998
 999         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1000         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1001                 return -EINVAL;
1002         return 0;
1003 nla_put_failure:
1004         return -EINVAL;
1005 }
1006
1007
1008 #ifndef HOSTAPD
1009 struct wiphy_info_data {
1010         int max_scan_ssids;
1011         int ap_supported;
1012         int auth_supported;
1013         int connect_supported;
1014 };
1015
1016
1017 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1018 {
1019         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1020         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1021         struct wiphy_info_data *info = arg;
1022
1023         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1024                   genlmsg_attrlen(gnlh, 0), NULL);
1025
1026         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1027                 info->max_scan_ssids =
1028                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1029
1030         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1031                 struct nlattr *nl_mode;
1032                 int i;
1033                 nla_for_each_nested(nl_mode,
1034                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1035                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1036                                 info->ap_supported = 1;
1037                                 break;
1038                         }
1039                 }
1040         }
1041
1042         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1043                 struct nlattr *nl_cmd;
1044                 int i;
1045
1046                 nla_for_each_nested(nl_cmd,
1047                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1048                         u32 cmd = nla_get_u32(nl_cmd);
1049                         if (cmd == NL80211_CMD_AUTHENTICATE)
1050                                 info->auth_supported = 1;
1051                         else if (cmd == NL80211_CMD_CONNECT)
1052                                 info->connect_supported = 1;
1053                 }
1054         }
1055
1056         return NL_SKIP;
1057 }
1058
1059
1060 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1061                                        struct wiphy_info_data *info)
1062 {
1063         struct nl_msg *msg;
1064
1065         os_memset(info, 0, sizeof(*info));
1066         msg = nlmsg_alloc();
1067         if (!msg)
1068                 return -1;
1069
1070         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1071                     0, NL80211_CMD_GET_WIPHY, 0);
1072
1073         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);
1074
1075         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1076                 return 0;
1077         msg = NULL;
1078 nla_put_failure:
1079         nlmsg_free(msg);
1080         return -1;
1081 }
1082
1083
1084 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1085 {
1086         struct wiphy_info_data info;
1087         if (wpa_driver_nl80211_get_info(drv, &info))
1088                 return -1;
1089         drv->has_capability = 1;
1090         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1091         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1092                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1093                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1094                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1095         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1096                 WPA_DRIVER_CAPA_ENC_WEP104 |
1097                 WPA_DRIVER_CAPA_ENC_TKIP |
1098                 WPA_DRIVER_CAPA_ENC_CCMP;
1099         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1100                 WPA_DRIVER_AUTH_SHARED |
1101                 WPA_DRIVER_AUTH_LEAP;
1102
1103         drv->capa.max_scan_ssids = info.max_scan_ssids;
1104         if (info.ap_supported)
1105                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1106
1107         if (info.auth_supported)
1108                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1109         else if (!info.connect_supported) {
1110                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1111                            "authentication/association or connect commands");
1112                 return -1;
1113         }
1114
1115         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1116
1117         return 0;
1118 }
1119 #endif /* HOSTAPD */
1120
1121
1122 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1123                                       void *ctx)
1124 {
1125         int ret;
1126
1127         /* Initialize generic netlink and nl80211 */
1128
1129         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1130         if (drv->nl_cb == NULL) {
1131                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1132                            "callbacks");
1133                 goto err1;
1134         }
1135
1136         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1137         if (drv->nl_handle == NULL) {
1138                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1139                            "callbacks");
1140                 goto err2;
1141         }
1142
1143         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1144         if (drv->nl_handle_event == NULL) {
1145                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1146                            "callbacks (event)");
1147                 goto err2b;
1148         }
1149
1150         if (genl_connect(drv->nl_handle)) {
1151                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1152                            "netlink");
1153                 goto err3;
1154         }
1155
1156         if (genl_connect(drv->nl_handle_event)) {
1157                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1158                            "netlink (event)");
1159                 goto err3;
1160         }
1161
1162 #ifdef CONFIG_LIBNL20
1163         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1164                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1165                            "netlink cache");
1166                 goto err3;
1167         }
1168         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1169             0) {
1170                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1171                            "netlink cache (event)");
1172                 goto err3b;
1173         }
1174 #else /* CONFIG_LIBNL20 */
1175         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1176         if (drv->nl_cache == NULL) {
1177                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1178                            "netlink cache");
1179                 goto err3;
1180         }
1181         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1182         if (drv->nl_cache_event == NULL) {
1183                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1184                            "netlink cache (event)");
1185                 goto err3b;
1186         }
1187 #endif /* CONFIG_LIBNL20 */
1188
1189         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1190         if (drv->nl80211 == NULL) {
1191                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1192                            "found");
1193                 goto err4;
1194         }
1195
1196         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1197         if (ret >= 0)
1198                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1199         if (ret < 0) {
1200                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1201                            "membership for scan events: %d (%s)",
1202                            ret, strerror(-ret));
1203                 goto err4;
1204         }
1205
1206         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1207         if (ret >= 0)
1208                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1209         if (ret < 0) {
1210                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1211                            "membership for mlme events: %d (%s)",
1212                            ret, strerror(-ret));
1213                 goto err4;
1214         }
1215
1216         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1217                                  wpa_driver_nl80211_event_receive, drv, ctx);
1218
1219         return 0;
1220
1221 err4:
1222         nl_cache_free(drv->nl_cache_event);
1223 err3b:
1224         nl_cache_free(drv->nl_cache);
1225 err3:
1226         nl_handle_destroy(drv->nl_handle_event);
1227 err2b:
1228         nl_handle_destroy(drv->nl_handle);
1229 err2:
1230         nl_cb_put(drv->nl_cb);
1231 err1:
1232         return -1;
1233 }
1234
1235
1236 /**
1237  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1238  * @ctx: context to be used when calling wpa_supplicant functions,
1239  * e.g., wpa_supplicant_event()
1240  * @ifname: interface name, e.g., wlan0
1241  * Returns: Pointer to private data, %NULL on failure
1242  */
1243 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1244 {
1245         struct wpa_driver_nl80211_data *drv;
1246         struct netlink_config *cfg;
1247         struct i802_bss *bss;
1248
1249         drv = os_zalloc(sizeof(*drv));
1250         if (drv == NULL)
1251                 return NULL;
1252         drv->ctx = ctx;
1253         bss = &drv->first_bss;
1254         bss->drv = drv;
1255         os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
1256         drv->monitor_ifidx = -1;
1257         drv->monitor_sock = -1;
1258         drv->ioctl_sock = -1;
1259
1260         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1261                 os_free(drv);
1262                 return NULL;
1263         }
1264
1265         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1266         if (drv->ioctl_sock < 0) {
1267                 perror("socket(PF_INET,SOCK_DGRAM)");
1268                 goto failed;
1269         }
1270
1271         cfg = os_zalloc(sizeof(*cfg));
1272         if (cfg == NULL)
1273                 goto failed;
1274         cfg->ctx = drv;
1275         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1276         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1277         drv->netlink = netlink_init(cfg);
1278         if (drv->netlink == NULL) {
1279                 os_free(cfg);
1280                 goto failed;
1281         }
1282         if (wpa_driver_nl80211_finish_drv_init(drv))
1283                 goto failed;
1284
1285         return bss;
1286
1287 failed:
1288         netlink_deinit(drv->netlink);
1289         if (drv->ioctl_sock >= 0)
1290                 close(drv->ioctl_sock);
1291
1292         genl_family_put(drv->nl80211);
1293         nl_cache_free(drv->nl_cache);
1294         nl_handle_destroy(drv->nl_handle);
1295         nl_cb_put(drv->nl_cb);
1296         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1297
1298         os_free(drv);
1299         return NULL;
1300 }
1301
1302
1303 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
1304                                          const u8 *match, size_t match_len)
1305 {
1306         struct nl_msg *msg;
1307         int ret = -1;
1308
1309         msg = nlmsg_alloc();
1310         if (!msg)
1311                 return -1;
1312
1313         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1314                     NL80211_CMD_REGISTER_ACTION, 0);
1315
1316         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1317         NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
1318
1319         ret = send_and_recv(drv, drv->nl_handle_event, msg, NULL, NULL);
1320         msg = NULL;
1321         if (ret) {
1322                 wpa_printf(MSG_DEBUG, "nl80211: Register Action command "
1323                            "failed: ret=%d (%s)", ret, strerror(-ret));
1324                 wpa_hexdump(MSG_DEBUG, "nl80211: Register Action match",
1325                             match, match_len);
1326                 goto nla_put_failure;
1327         }
1328         ret = 0;
1329 nla_put_failure:
1330         nlmsg_free(msg);
1331         return ret;
1332 }
1333
1334
1335 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
1336 {
1337         if (0) {
1338                 /* Public Action frames */
1339                 return nl80211_register_action_frame(drv, (u8 *) "\x04", 1);
1340         }
1341         return 0;
1342 }
1343
1344
1345 static int
1346 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1347 {
1348         struct i802_bss *bss = &drv->first_bss;
1349
1350         drv->ifindex = if_nametoindex(bss->ifname);
1351         drv->first_bss.ifindex = drv->ifindex;
1352
1353 #ifndef HOSTAPD
1354         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA) < 0) {
1355                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1356                            "use managed mode");
1357         }
1358
1359         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
1360                 wpa_printf(MSG_ERROR, "Could not set interface '%s' UP",
1361                            bss->ifname);
1362                 return -1;
1363         }
1364
1365         if (wpa_driver_nl80211_capa(drv))
1366                 return -1;
1367
1368         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1369                                1, IF_OPER_DORMANT);
1370 #endif /* HOSTAPD */
1371
1372         if (nl80211_register_action_frames(drv) < 0)
1373                 return -1;
1374
1375         return 0;
1376 }
1377
1378
1379 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1380 {
1381         struct nl_msg *msg;
1382
1383         msg = nlmsg_alloc();
1384         if (!msg)
1385                 return -ENOMEM;
1386
1387         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1388                     0, NL80211_CMD_DEL_BEACON, 0);
1389         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1390
1391         return send_and_recv_msgs(drv, msg, NULL, NULL);
1392  nla_put_failure:
1393         return -ENOBUFS;
1394 }
1395
1396
1397 /**
1398  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1399  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1400  *
1401  * Shut down driver interface and processing of driver events. Free
1402  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1403  */
1404 static void wpa_driver_nl80211_deinit(void *priv)
1405 {
1406         struct i802_bss *bss = priv;
1407         struct wpa_driver_nl80211_data *drv = bss->drv;
1408
1409         if (drv->added_if_into_bridge) {
1410                 if (linux_br_del_if(drv->ioctl_sock, drv->brname, bss->ifname)
1411                     < 0)
1412                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1413                                    "interface %s from bridge %s: %s",
1414                                    bss->ifname, drv->brname, strerror(errno));
1415         }
1416         if (drv->added_bridge) {
1417                 if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
1418                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1419                                    "bridge %s: %s",
1420                                    drv->brname, strerror(errno));
1421         }
1422
1423         nl80211_remove_monitor_interface(drv);
1424
1425         if (drv->nlmode == NL80211_IFTYPE_AP)
1426                 wpa_driver_nl80211_del_beacon(drv);
1427
1428 #ifdef HOSTAPD
1429         if (drv->last_freq_ht) {
1430                 /* Clear HT flags from the driver */
1431                 struct hostapd_freq_params freq;
1432                 os_memset(&freq, 0, sizeof(freq));
1433                 freq.freq = drv->last_freq;
1434                 i802_set_freq(priv, &freq);
1435         }
1436
1437         if (drv->eapol_sock >= 0) {
1438                 eloop_unregister_read_sock(drv->eapol_sock);
1439                 close(drv->eapol_sock);
1440         }
1441
1442         if (drv->if_indices != drv->default_if_indices)
1443                 os_free(drv->if_indices);
1444 #endif /* HOSTAPD */
1445
1446         if (drv->disable_11b_rates)
1447                 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
1448
1449         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1450         netlink_deinit(drv->netlink);
1451
1452         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1453
1454         (void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
1455         wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA);
1456
1457         if (drv->ioctl_sock >= 0)
1458                 close(drv->ioctl_sock);
1459
1460         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1461         genl_family_put(drv->nl80211);
1462         nl_cache_free(drv->nl_cache);
1463         nl_cache_free(drv->nl_cache_event);
1464         nl_handle_destroy(drv->nl_handle);
1465         nl_handle_destroy(drv->nl_handle_event);
1466         nl_cb_put(drv->nl_cb);
1467
1468         eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1469                              drv, NULL);
1470
1471         os_free(drv->filter_ssids);
1472
1473         os_free(drv);
1474 }
1475
1476
1477 /**
1478  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1479  * @eloop_ctx: Driver private data
1480  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1481  *
1482  * This function can be used as registered timeout when starting a scan to
1483  * generate a scan completed event if the driver does not report this.
1484  */
1485 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1486 {
1487         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1488         if (drv->ap_scan_as_station) {
1489                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1490                                             IEEE80211_MODE_AP);
1491                 drv->ap_scan_as_station = 0;
1492         }
1493         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1494         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1495 }
1496
1497
1498 /**
1499  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1500  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1501  * @params: Scan parameters
1502  * Returns: 0 on success, -1 on failure
1503  */
1504 static int wpa_driver_nl80211_scan(void *priv,
1505                                    struct wpa_driver_scan_params *params)
1506 {
1507         struct i802_bss *bss = priv;
1508         struct wpa_driver_nl80211_data *drv = bss->drv;
1509         int ret = 0, timeout;
1510         struct nl_msg *msg, *ssids, *freqs;
1511         size_t i;
1512
1513         msg = nlmsg_alloc();
1514         ssids = nlmsg_alloc();
1515         freqs = nlmsg_alloc();
1516         if (!msg || !ssids || !freqs) {
1517                 nlmsg_free(msg);
1518                 nlmsg_free(ssids);
1519                 nlmsg_free(freqs);
1520                 return -1;
1521         }
1522
1523         os_free(drv->filter_ssids);
1524         drv->filter_ssids = params->filter_ssids;
1525         params->filter_ssids = NULL;
1526         drv->num_filter_ssids = params->num_filter_ssids;
1527
1528         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1529                     NL80211_CMD_TRIGGER_SCAN, 0);
1530
1531         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1532
1533         for (i = 0; i < params->num_ssids; i++) {
1534                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1535                         params->ssids[i].ssid);
1536         }
1537         if (params->num_ssids)
1538                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1539
1540         if (params->extra_ies) {
1541                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1542                         params->extra_ies);
1543         }
1544
1545         if (params->freqs) {
1546                 for (i = 0; params->freqs[i]; i++)
1547                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1548                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1549         }
1550
1551         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1552         msg = NULL;
1553         if (ret) {
1554                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1555                            "(%s)", ret, strerror(-ret));
1556 #ifdef HOSTAPD
1557                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1558                         /*
1559                          * mac80211 does not allow scan requests in AP mode, so
1560                          * try to do this in station mode.
1561                          */
1562                         if (wpa_driver_nl80211_set_mode(bss,
1563                                                         IEEE80211_MODE_INFRA))
1564                                 goto nla_put_failure;
1565
1566                         if (wpa_driver_nl80211_scan(drv, params)) {
1567                                 wpa_driver_nl80211_set_mode(bss,
1568                                                             IEEE80211_MODE_AP);
1569                                 goto nla_put_failure;
1570                         }
1571
1572                         /* Restore AP mode when processing scan results */
1573                         drv->ap_scan_as_station = 1;
1574                         ret = 0;
1575                 } else
1576                         goto nla_put_failure;
1577 #else /* HOSTAPD */
1578                 goto nla_put_failure;
1579 #endif /* HOSTAPD */
1580         }
1581
1582         /* Not all drivers generate "scan completed" wireless event, so try to
1583          * read results after a timeout. */
1584         timeout = 10;
1585         if (drv->scan_complete_events) {
1586                 /*
1587                  * The driver seems to deliver events to notify when scan is
1588                  * complete, so use longer timeout to avoid race conditions
1589                  * with scanning and following association request.
1590                  */
1591                 timeout = 30;
1592         }
1593         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1594                    "seconds", ret, timeout);
1595         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1596         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1597                                drv, drv->ctx);
1598
1599 nla_put_failure:
1600         nlmsg_free(ssids);
1601         nlmsg_free(msg);
1602         nlmsg_free(freqs);
1603         return ret;
1604 }
1605
1606
1607 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
1608 {
1609         const u8 *end, *pos;
1610
1611         if (ies == NULL)
1612                 return NULL;
1613
1614         pos = ies;
1615         end = ies + ies_len;
1616
1617         while (pos + 1 < end) {
1618                 if (pos + 2 + pos[1] > end)
1619                         break;
1620                 if (pos[0] == ie)
1621                         return pos;
1622                 pos += 2 + pos[1];
1623         }
1624
1625         return NULL;
1626 }
1627
1628
1629 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
1630                                  const u8 *ie, size_t ie_len)
1631 {
1632         const u8 *ssid;
1633         size_t i;
1634
1635         if (drv->filter_ssids == NULL)
1636                 return 0;
1637
1638         ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
1639         if (ssid == NULL)
1640                 return 1;
1641
1642         for (i = 0; i < drv->num_filter_ssids; i++) {
1643                 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
1644                     os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
1645                     0)
1646                         return 0;
1647         }
1648
1649         return 1;
1650 }
1651
1652
1653 struct nl80211_bss_info_arg {
1654         struct wpa_driver_nl80211_data *drv;
1655         struct wpa_scan_results *res;
1656 };
1657
1658 static int bss_info_handler(struct nl_msg *msg, void *arg)
1659 {
1660         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1661         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1662         struct nlattr *bss[NL80211_BSS_MAX + 1];
1663         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1664                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1665                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1666                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1667                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1668                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1669                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1670                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1671                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1672                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1673                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1674                 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
1675         };
1676         struct nl80211_bss_info_arg *_arg = arg;
1677         struct wpa_scan_results *res = _arg->res;
1678         struct wpa_scan_res **tmp;
1679         struct wpa_scan_res *r;
1680         const u8 *ie, *beacon_ie;
1681         size_t ie_len, beacon_ie_len;
1682         u8 *pos;
1683
1684         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1685                   genlmsg_attrlen(gnlh, 0), NULL);
1686         if (!tb[NL80211_ATTR_BSS])
1687                 return NL_SKIP;
1688         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1689                              bss_policy))
1690                 return NL_SKIP;
1691         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1692                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1693                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1694         } else {
1695                 ie = NULL;
1696                 ie_len = 0;
1697         }
1698         if (bss[NL80211_BSS_BEACON_IES]) {
1699                 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
1700                 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
1701         } else {
1702                 beacon_ie = NULL;
1703                 beacon_ie_len = 0;
1704         }
1705
1706         if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
1707                                   ie ? ie_len : beacon_ie_len))
1708                 return NL_SKIP;
1709
1710         r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
1711         if (r == NULL)
1712                 return NL_SKIP;
1713         if (bss[NL80211_BSS_BSSID])
1714                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1715                           ETH_ALEN);
1716         if (bss[NL80211_BSS_FREQUENCY])
1717                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1718         if (bss[NL80211_BSS_BEACON_INTERVAL])
1719                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1720         if (bss[NL80211_BSS_CAPABILITY])
1721                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1722         r->flags |= WPA_SCAN_NOISE_INVALID;
1723         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1724                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1725                 r->level /= 100; /* mBm to dBm */
1726                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1727         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1728                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1729                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1730         } else
1731                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1732         if (bss[NL80211_BSS_TSF])
1733                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1734         if (bss[NL80211_BSS_SEEN_MS_AGO])
1735                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1736         r->ie_len = ie_len;
1737         pos = (u8 *) (r + 1);
1738         if (ie) {
1739                 os_memcpy(pos, ie, ie_len);
1740                 pos += ie_len;
1741         }
1742         r->beacon_ie_len = beacon_ie_len;
1743         if (beacon_ie)
1744                 os_memcpy(pos, beacon_ie, beacon_ie_len);
1745
1746         if (bss[NL80211_BSS_STATUS]) {
1747                 enum nl80211_bss_status status;
1748                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1749                 switch (status) {
1750                 case NL80211_BSS_STATUS_AUTHENTICATED:
1751                         r->flags |= WPA_SCAN_AUTHENTICATED;
1752                         break;
1753                 case NL80211_BSS_STATUS_ASSOCIATED:
1754                         r->flags |= WPA_SCAN_ASSOCIATED;
1755                         break;
1756                 default:
1757                         break;
1758                 }
1759         }
1760
1761         tmp = os_realloc(res->res,
1762                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1763         if (tmp == NULL) {
1764                 os_free(r);
1765                 return NL_SKIP;
1766         }
1767         tmp[res->num++] = r;
1768         res->res = tmp;
1769
1770         return NL_SKIP;
1771 }
1772
1773
1774 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1775                                  const u8 *addr)
1776 {
1777         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1778                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1779                            "mismatch (" MACSTR ")", MAC2STR(addr));
1780                 wpa_driver_nl80211_mlme(drv, addr,
1781                                         NL80211_CMD_DEAUTHENTICATE,
1782                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1783         }
1784 }
1785
1786
1787 static void wpa_driver_nl80211_check_bss_status(
1788         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1789 {
1790         size_t i;
1791
1792         for (i = 0; i < res->num; i++) {
1793                 struct wpa_scan_res *r = res->res[i];
1794                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1795                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1796                                    "indicates BSS status with " MACSTR
1797                                    " as authenticated",
1798                                    MAC2STR(r->bssid));
1799                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1800                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1801                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1802                             0) {
1803                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1804                                            " in local state (auth=" MACSTR
1805                                            " assoc=" MACSTR ")",
1806                                            MAC2STR(drv->auth_bssid),
1807                                            MAC2STR(drv->bssid));
1808                                 clear_state_mismatch(drv, r->bssid);
1809                         }
1810                 }
1811
1812                 if (r->flags & WPA_SCAN_ASSOCIATED) {
1813                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1814                                    "indicate BSS status with " MACSTR
1815                                    " as associated",
1816                                    MAC2STR(r->bssid));
1817                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1818                             !drv->associated) {
1819                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1820                                            "(not associated) does not match "
1821                                            "with BSS state");
1822                                 clear_state_mismatch(drv, r->bssid);
1823                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1824                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1825                                    0) {
1826                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1827                                            "(associated with " MACSTR ") does "
1828                                            "not match with BSS state",
1829                                            MAC2STR(drv->bssid));
1830                                 clear_state_mismatch(drv, r->bssid);
1831                                 clear_state_mismatch(drv, drv->bssid);
1832                         }
1833                 }
1834         }
1835 }
1836
1837
1838 static void wpa_scan_results_free(struct wpa_scan_results *res)
1839 {
1840         size_t i;
1841
1842         if (res == NULL)
1843                 return;
1844
1845         for (i = 0; i < res->num; i++)
1846                 os_free(res->res[i]);
1847         os_free(res->res);
1848         os_free(res);
1849 }
1850
1851
1852 static struct wpa_scan_results *
1853 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
1854 {
1855         struct nl_msg *msg;
1856         struct wpa_scan_results *res;
1857         int ret;
1858         struct nl80211_bss_info_arg arg;
1859
1860         res = os_zalloc(sizeof(*res));
1861         if (res == NULL)
1862                 return NULL;
1863         msg = nlmsg_alloc();
1864         if (!msg)
1865                 goto nla_put_failure;
1866
1867         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1868                     NL80211_CMD_GET_SCAN, 0);
1869         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1870
1871         arg.drv = drv;
1872         arg.res = res;
1873         ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
1874         msg = NULL;
1875         if (ret == 0) {
1876                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1877                            (unsigned long) res->num);
1878                 return res;
1879         }
1880         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1881                    "(%s)", ret, strerror(-ret));
1882 nla_put_failure:
1883         nlmsg_free(msg);
1884         wpa_scan_results_free(res);
1885         return NULL;
1886 }
1887
1888
1889 /**
1890  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1891  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1892  * Returns: Scan results on success, -1 on failure
1893  */
1894 static struct wpa_scan_results *
1895 wpa_driver_nl80211_get_scan_results(void *priv)
1896 {
1897         struct i802_bss *bss = priv;
1898         struct wpa_driver_nl80211_data *drv = bss->drv;
1899         struct wpa_scan_results *res;
1900
1901         res = nl80211_get_scan_results(drv);
1902         if (res)
1903                 wpa_driver_nl80211_check_bss_status(drv, res);
1904         return res;
1905 }
1906
1907
1908 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
1909 {
1910         struct wpa_scan_results *res;
1911         size_t i;
1912
1913         res = nl80211_get_scan_results(drv);
1914         if (res == NULL) {
1915                 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
1916                 return;
1917         }
1918
1919         wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
1920         for (i = 0; i < res->num; i++) {
1921                 struct wpa_scan_res *r = res->res[i];
1922                 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
1923                            (int) i, (int) res->num, MAC2STR(r->bssid),
1924                            r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
1925                            r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
1926         }
1927
1928         wpa_scan_results_free(res);
1929 }
1930
1931
1932 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1933                                       enum wpa_alg alg, const u8 *addr,
1934                                       int key_idx, int set_tx,
1935                                       const u8 *seq, size_t seq_len,
1936                                       const u8 *key, size_t key_len)
1937 {
1938         struct i802_bss *bss = priv;
1939         struct wpa_driver_nl80211_data *drv = bss->drv;
1940         int ifindex = if_nametoindex(ifname);
1941         struct nl_msg *msg;
1942         int ret;
1943
1944         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1945                    "set_tx=%d seq_len=%lu key_len=%lu",
1946                    __func__, ifindex, alg, addr, key_idx, set_tx,
1947                    (unsigned long) seq_len, (unsigned long) key_len);
1948
1949         msg = nlmsg_alloc();
1950         if (!msg)
1951                 return -ENOMEM;
1952
1953         if (alg == WPA_ALG_NONE) {
1954                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1955                             0, NL80211_CMD_DEL_KEY, 0);
1956         } else {
1957                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1958                             0, NL80211_CMD_NEW_KEY, 0);
1959                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1960                 switch (alg) {
1961                 case WPA_ALG_WEP:
1962                         if (key_len == 5)
1963                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1964                                             WLAN_CIPHER_SUITE_WEP40);
1965                         else
1966                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1967                                             WLAN_CIPHER_SUITE_WEP104);
1968                         break;
1969                 case WPA_ALG_TKIP:
1970                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1971                                     WLAN_CIPHER_SUITE_TKIP);
1972                         break;
1973                 case WPA_ALG_CCMP:
1974                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1975                                     WLAN_CIPHER_SUITE_CCMP);
1976                         break;
1977                 case WPA_ALG_IGTK:
1978                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1979                                     WLAN_CIPHER_SUITE_AES_CMAC);
1980                         break;
1981                 default:
1982                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1983                                    "algorithm %d", __func__, alg);
1984                         nlmsg_free(msg);
1985                         return -1;
1986                 }
1987         }
1988
1989         if (seq && seq_len)
1990                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1991
1992         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1993         {
1994                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1995                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1996         }
1997         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1998         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1999
2000         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2001         if (ret == -ENOENT && alg == WPA_ALG_NONE)
2002                 ret = 0;
2003         if (ret)
2004                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
2005                            ret, strerror(-ret));
2006
2007         /*
2008          * If we failed or don't need to set the default TX key (below),
2009          * we're done here.
2010          */
2011         if (ret || !set_tx || alg == WPA_ALG_NONE)
2012                 return ret;
2013 #ifdef HOSTAPD /* FIX: is this needed? */
2014         if (addr)
2015                 return ret;
2016 #endif /* HOSTAPD */
2017
2018         msg = nlmsg_alloc();
2019         if (!msg)
2020                 return -ENOMEM;
2021
2022         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2023                     0, NL80211_CMD_SET_KEY, 0);
2024         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2025         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2026         if (alg == WPA_ALG_IGTK)
2027                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2028         else
2029                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2030
2031         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2032         if (ret == -ENOENT)
2033                 ret = 0;
2034         if (ret)
2035                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
2036                            "err=%d %s)", ret, strerror(-ret));
2037         return ret;
2038
2039 nla_put_failure:
2040         return -ENOBUFS;
2041 }
2042
2043
2044 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
2045                       int key_idx, int defkey,
2046                       const u8 *seq, size_t seq_len,
2047                       const u8 *key, size_t key_len)
2048 {
2049         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
2050         if (!key_attr)
2051                 return -1;
2052
2053         if (defkey && alg == WPA_ALG_IGTK)
2054                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
2055         else if (defkey)
2056                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2057
2058         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
2059
2060         switch (alg) {
2061         case WPA_ALG_WEP:
2062                 if (key_len == 5)
2063                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2064                                     WLAN_CIPHER_SUITE_WEP40);
2065                 else
2066                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2067                                     WLAN_CIPHER_SUITE_WEP104);
2068                 break;
2069         case WPA_ALG_TKIP:
2070                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
2071                 break;
2072         case WPA_ALG_CCMP:
2073                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
2074                 break;
2075         case WPA_ALG_IGTK:
2076                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2077                             WLAN_CIPHER_SUITE_AES_CMAC);
2078                 break;
2079         default:
2080                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2081                            "algorithm %d", __func__, alg);
2082                 return -1;
2083         }
2084
2085         if (seq && seq_len)
2086                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
2087
2088         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
2089
2090         nla_nest_end(msg, key_attr);
2091
2092         return 0;
2093  nla_put_failure:
2094         return -1;
2095 }
2096
2097
2098 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
2099                                  struct nl_msg *msg)
2100 {
2101         int i, privacy = 0;
2102         struct nlattr *nl_keys, *nl_key;
2103
2104         for (i = 0; i < 4; i++) {
2105                 if (!params->wep_key[i])
2106                         continue;
2107                 privacy = 1;
2108                 break;
2109         }
2110         if (!privacy)
2111                 return 0;
2112
2113         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2114
2115         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2116         if (!nl_keys)
2117                 goto nla_put_failure;
2118
2119         for (i = 0; i < 4; i++) {
2120                 if (!params->wep_key[i])
2121                         continue;
2122
2123                 nl_key = nla_nest_start(msg, i);
2124                 if (!nl_key)
2125                         goto nla_put_failure;
2126
2127                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2128                         params->wep_key[i]);
2129                 if (params->wep_key_len[i] == 5)
2130                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2131                                     WLAN_CIPHER_SUITE_WEP40);
2132                 else
2133                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2134                                     WLAN_CIPHER_SUITE_WEP104);
2135
2136                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2137
2138                 if (i == params->wep_tx_keyidx)
2139                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2140
2141                 nla_nest_end(msg, nl_key);
2142         }
2143         nla_nest_end(msg, nl_keys);
2144
2145         return 0;
2146
2147 nla_put_failure:
2148         return -ENOBUFS;
2149 }
2150
2151
2152 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2153                                    const u8 *addr, int cmd, u16 reason_code)
2154 {
2155         int ret = -1;
2156         struct nl_msg *msg;
2157
2158         msg = nlmsg_alloc();
2159         if (!msg)
2160                 return -1;
2161
2162         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2163
2164         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2165         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2166         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2167
2168         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2169         msg = NULL;
2170         if (ret) {
2171                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2172                            "(%s)", ret, strerror(-ret));
2173                 goto nla_put_failure;
2174         }
2175         ret = 0;
2176
2177 nla_put_failure:
2178         nlmsg_free(msg);
2179         return ret;
2180 }
2181
2182
2183 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2184                                          const u8 *addr, int reason_code)
2185 {
2186         wpa_printf(MSG_DEBUG, "%s", __func__);
2187         drv->associated = 0;
2188         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2189                                        reason_code);
2190 }
2191
2192
2193 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2194                                              int reason_code)
2195 {
2196         struct i802_bss *bss = priv;
2197         struct wpa_driver_nl80211_data *drv = bss->drv;
2198         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2199                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2200         wpa_printf(MSG_DEBUG, "%s", __func__);
2201         drv->associated = 0;
2202         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2203                                        reason_code);
2204 }
2205
2206
2207 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2208                                            int reason_code)
2209 {
2210         struct i802_bss *bss = priv;
2211         struct wpa_driver_nl80211_data *drv = bss->drv;
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 i802_bss *bss = priv;
2225         struct wpa_driver_nl80211_data *drv = bss->drv;
2226         int ret = -1, i;
2227         struct nl_msg *msg;
2228         enum nl80211_auth_type type;
2229         int count = 0;
2230
2231         drv->associated = 0;
2232         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2233         /* FIX: IBSS mode */
2234         if (drv->nlmode != NL80211_IFTYPE_STATION)
2235                 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2236
2237         if (wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA) < 0)
2238                 return -1;
2239
2240 retry:
2241         msg = nlmsg_alloc();
2242         if (!msg)
2243                 return -1;
2244
2245         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2246                    drv->ifindex);
2247
2248         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2249                     NL80211_CMD_AUTHENTICATE, 0);
2250
2251         for (i = 0; i < 4; i++) {
2252                 if (!params->wep_key[i])
2253                         continue;
2254                 wpa_driver_nl80211_set_key(bss->ifname, drv, WPA_ALG_WEP, NULL,
2255                                            i,
2256                                            i == params->wep_tx_keyidx, NULL, 0,
2257                                            params->wep_key[i],
2258                                            params->wep_key_len[i]);
2259                 if (params->wep_tx_keyidx != i)
2260                         continue;
2261                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2262                                params->wep_key[i], params->wep_key_len[i])) {
2263                         nlmsg_free(msg);
2264                         return -1;
2265                 }
2266         }
2267
2268         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2269         if (params->bssid) {
2270                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2271                            MAC2STR(params->bssid));
2272                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2273         }
2274         if (params->freq) {
2275                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2276                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2277         }
2278         if (params->ssid) {
2279                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2280                                   params->ssid, params->ssid_len);
2281                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2282                         params->ssid);
2283         }
2284         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2285         if (params->ie)
2286                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2287         /*
2288          * TODO: if multiple auth_alg options enabled, try them one by one if
2289          * the AP rejects authentication due to unknown auth alg
2290          */
2291         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2292                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2293         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2294                 type = NL80211_AUTHTYPE_SHARED_KEY;
2295         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2296                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2297         else if (params->auth_alg & WPA_AUTH_ALG_FT)
2298                 type = NL80211_AUTHTYPE_FT;
2299         else
2300                 goto nla_put_failure;
2301         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2302         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2303
2304         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2305         msg = NULL;
2306         if (ret) {
2307                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2308                            "(%s)", ret, strerror(-ret));
2309                 count++;
2310                 if (ret == -EALREADY && count == 1 && params->bssid) {
2311                         /*
2312                          * mac80211 does not currently accept new
2313                          * authentication if we are already authenticated. As a
2314                          * workaround, force deauthentication and try again.
2315                          */
2316                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2317                                    "after forced deauthentication");
2318                         wpa_driver_nl80211_deauthenticate(
2319                                 drv, params->bssid,
2320                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2321                         nlmsg_free(msg);
2322                         goto retry;
2323                 }
2324                 goto nla_put_failure;
2325         }
2326         ret = 0;
2327         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2328                    "successfully");
2329
2330 nla_put_failure:
2331         nlmsg_free(msg);
2332         return ret;
2333 }
2334
2335
2336 struct phy_info_arg {
2337         u16 *num_modes;
2338         struct hostapd_hw_modes *modes;
2339 };
2340
2341 static int phy_info_handler(struct nl_msg *msg, void *arg)
2342 {
2343         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2344         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2345         struct phy_info_arg *phy_info = arg;
2346
2347         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2348
2349         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2350         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2351                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2352                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2353                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2354                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2355                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2356                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2357         };
2358
2359         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2360         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2361                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2362                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2363         };
2364
2365         struct nlattr *nl_band;
2366         struct nlattr *nl_freq;
2367         struct nlattr *nl_rate;
2368         int rem_band, rem_freq, rem_rate;
2369         struct hostapd_hw_modes *mode;
2370         int idx, mode_is_set;
2371
2372         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2373                   genlmsg_attrlen(gnlh, 0), NULL);
2374
2375         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2376                 return NL_SKIP;
2377
2378         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2379                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2380                 if (!mode)
2381                         return NL_SKIP;
2382                 phy_info->modes = mode;
2383
2384                 mode_is_set = 0;
2385
2386                 mode = &phy_info->modes[*(phy_info->num_modes)];
2387                 memset(mode, 0, sizeof(*mode));
2388                 *(phy_info->num_modes) += 1;
2389
2390                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2391                           nla_len(nl_band), NULL);
2392
2393                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2394                         mode->ht_capab = nla_get_u16(
2395                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2396                 }
2397
2398                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2399                         mode->a_mpdu_params |= nla_get_u8(
2400                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2401                                 0x03;
2402                 }
2403
2404                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2405                         mode->a_mpdu_params |= nla_get_u8(
2406                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2407                                 2;
2408                 }
2409
2410                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2411                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2412                         u8 *mcs;
2413                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2414                         os_memcpy(mode->mcs_set, mcs, 16);
2415                 }
2416
2417                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2418                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2419                                   nla_len(nl_freq), freq_policy);
2420                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2421                                 continue;
2422                         mode->num_channels++;
2423                 }
2424
2425                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2426                 if (!mode->channels)
2427                         return NL_SKIP;
2428
2429                 idx = 0;
2430
2431                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2432                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2433                                   nla_len(nl_freq), freq_policy);
2434                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2435                                 continue;
2436
2437                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2438                         mode->channels[idx].flag = 0;
2439
2440                         if (!mode_is_set) {
2441                                 /* crude heuristic */
2442                                 if (mode->channels[idx].freq < 4000)
2443                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2444                                 else
2445                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2446                                 mode_is_set = 1;
2447                         }
2448
2449                         /* crude heuristic */
2450                         if (mode->channels[idx].freq < 4000)
2451                                 if (mode->channels[idx].freq == 2484)
2452                                         mode->channels[idx].chan = 14;
2453                                 else
2454                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2455                         else
2456                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2457
2458                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2459                                 mode->channels[idx].flag |=
2460                                         HOSTAPD_CHAN_DISABLED;
2461                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2462                                 mode->channels[idx].flag |=
2463                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2464                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2465                                 mode->channels[idx].flag |=
2466                                         HOSTAPD_CHAN_NO_IBSS;
2467                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2468                                 mode->channels[idx].flag |=
2469                                         HOSTAPD_CHAN_RADAR;
2470
2471                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2472                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2473                                 mode->channels[idx].max_tx_power =
2474                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2475
2476                         idx++;
2477                 }
2478
2479                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2480                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2481                                   nla_len(nl_rate), rate_policy);
2482                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2483                                 continue;
2484                         mode->num_rates++;
2485                 }
2486
2487                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2488                 if (!mode->rates)
2489                         return NL_SKIP;
2490
2491                 idx = 0;
2492
2493                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2494                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2495                                   nla_len(nl_rate), rate_policy);
2496                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2497                                 continue;
2498                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2499
2500                         /* crude heuristic */
2501                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2502                             mode->rates[idx] > 200)
2503                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2504
2505                         idx++;
2506                 }
2507         }
2508
2509         return NL_SKIP;
2510 }
2511
2512 static struct hostapd_hw_modes *
2513 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2514 {
2515         u16 m;
2516         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2517         int i, mode11g_idx = -1;
2518
2519         /* If only 802.11g mode is included, use it to construct matching
2520          * 802.11b mode data. */
2521
2522         for (m = 0; m < *num_modes; m++) {
2523                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2524                         return modes; /* 802.11b already included */
2525                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2526                         mode11g_idx = m;
2527         }
2528
2529         if (mode11g_idx < 0)
2530                 return modes; /* 2.4 GHz band not supported at all */
2531
2532         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2533         if (nmodes == NULL)
2534                 return modes; /* Could not add 802.11b mode */
2535
2536         mode = &nmodes[*num_modes];
2537         os_memset(mode, 0, sizeof(*mode));
2538         (*num_modes)++;
2539         modes = nmodes;
2540
2541         mode->mode = HOSTAPD_MODE_IEEE80211B;
2542
2543         mode11g = &modes[mode11g_idx];
2544         mode->num_channels = mode11g->num_channels;
2545         mode->channels = os_malloc(mode11g->num_channels *
2546                                    sizeof(struct hostapd_channel_data));
2547         if (mode->channels == NULL) {
2548                 (*num_modes)--;
2549                 return modes; /* Could not add 802.11b mode */
2550         }
2551         os_memcpy(mode->channels, mode11g->channels,
2552                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2553
2554         mode->num_rates = 0;
2555         mode->rates = os_malloc(4 * sizeof(int));
2556         if (mode->rates == NULL) {
2557                 os_free(mode->channels);
2558                 (*num_modes)--;
2559                 return modes; /* Could not add 802.11b mode */
2560         }
2561
2562         for (i = 0; i < mode11g->num_rates; i++) {
2563                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2564                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2565                         continue;
2566                 mode->rates[mode->num_rates] = mode11g->rates[i];
2567                 mode->num_rates++;
2568                 if (mode->num_rates == 4)
2569                         break;
2570         }
2571
2572         if (mode->num_rates == 0) {
2573                 os_free(mode->channels);
2574                 os_free(mode->rates);
2575                 (*num_modes)--;
2576                 return modes; /* No 802.11b rates */
2577         }
2578
2579         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2580                    "information");
2581
2582         return modes;
2583 }
2584
2585
2586 static struct hostapd_hw_modes *
2587 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2588 {
2589         struct i802_bss *bss = priv;
2590         struct wpa_driver_nl80211_data *drv = bss->drv;
2591         struct nl_msg *msg;
2592         struct phy_info_arg result = {
2593                 .num_modes = num_modes,
2594                 .modes = NULL,
2595         };
2596
2597         *num_modes = 0;
2598         *flags = 0;
2599
2600         msg = nlmsg_alloc();
2601         if (!msg)
2602                 return NULL;
2603
2604         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2605                     0, NL80211_CMD_GET_WIPHY, 0);
2606
2607         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2608
2609         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2610                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2611  nla_put_failure:
2612         return NULL;
2613 }
2614
2615
2616 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2617                                          const void *data, size_t len,
2618                                          int encrypt)
2619 {
2620         __u8 rtap_hdr[] = {
2621                 0x00, 0x00, /* radiotap version */
2622                 0x0e, 0x00, /* radiotap length */
2623                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2624                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2625                 0x00,       /* padding */
2626                 0x00, 0x00, /* RX and TX flags to indicate that */
2627                 0x00, 0x00, /* this is the injected frame directly */
2628         };
2629         struct iovec iov[2] = {
2630                 {
2631                         .iov_base = &rtap_hdr,
2632                         .iov_len = sizeof(rtap_hdr),
2633                 },
2634                 {
2635                         .iov_base = (void *) data,
2636                         .iov_len = len,
2637                 }
2638         };
2639         struct msghdr msg = {
2640                 .msg_name = NULL,
2641                 .msg_namelen = 0,
2642                 .msg_iov = iov,
2643                 .msg_iovlen = 2,
2644                 .msg_control = NULL,
2645                 .msg_controllen = 0,
2646                 .msg_flags = 0,
2647         };
2648
2649         if (encrypt)
2650                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2651
2652         return sendmsg(drv->monitor_sock, &msg, 0);
2653 }
2654
2655
2656 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2657                                         size_t data_len)
2658 {
2659         struct i802_bss *bss = priv;
2660         struct wpa_driver_nl80211_data *drv = bss->drv;
2661         struct ieee80211_mgmt *mgmt;
2662         int encrypt = 1;
2663         u16 fc;
2664
2665         mgmt = (struct ieee80211_mgmt *) data;
2666         fc = le_to_host16(mgmt->frame_control);
2667
2668         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2669             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2670                 /*
2671                  * Only one of the authentication frame types is encrypted.
2672                  * In order for static WEP encryption to work properly (i.e.,
2673                  * to not encrypt the frame), we need to tell mac80211 about
2674                  * the frames that must not be encrypted.
2675                  */
2676                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2677                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2678                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2679                         encrypt = 0;
2680         }
2681
2682         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2683 }
2684
2685
2686 static int wpa_driver_nl80211_set_beacon(void *priv,
2687                                          const u8 *head, size_t head_len,
2688                                          const u8 *tail, size_t tail_len,
2689                                          int dtim_period, int beacon_int)
2690 {
2691         struct i802_bss *bss = priv;
2692         struct wpa_driver_nl80211_data *drv = bss->drv;
2693         struct nl_msg *msg;
2694         u8 cmd = NL80211_CMD_NEW_BEACON;
2695         int ret;
2696         int beacon_set;
2697         int ifindex = if_nametoindex(bss->ifname);
2698
2699         beacon_set = bss->beacon_set;
2700
2701         msg = nlmsg_alloc();
2702         if (!msg)
2703                 return -ENOMEM;
2704
2705         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2706                    beacon_set);
2707         if (beacon_set)
2708                 cmd = NL80211_CMD_SET_BEACON;
2709
2710         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2711                     0, cmd, 0);
2712         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2713         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2714         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2715         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2716         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2717
2718         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2719         if (ret) {
2720                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2721                            ret, strerror(-ret));
2722         } else {
2723                 bss->beacon_set = 1;
2724         }
2725         return ret;
2726  nla_put_failure:
2727         return -ENOBUFS;
2728 }
2729
2730
2731 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2732                                        int freq, int ht_enabled,
2733                                        int sec_channel_offset)
2734 {
2735         struct nl_msg *msg;
2736         int ret;
2737
2738         msg = nlmsg_alloc();
2739         if (!msg)
2740                 return -1;
2741
2742         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2743                     NL80211_CMD_SET_WIPHY, 0);
2744
2745         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2746         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2747         if (ht_enabled) {
2748                 switch (sec_channel_offset) {
2749                 case -1:
2750                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2751                                     NL80211_CHAN_HT40MINUS);
2752                         break;
2753                 case 1:
2754                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2755                                     NL80211_CHAN_HT40PLUS);
2756                         break;
2757                 default:
2758                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2759                                     NL80211_CHAN_HT20);
2760                         break;
2761                 }
2762         }
2763
2764         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2765         if (ret == 0)
2766                 return 0;
2767         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2768                    "%d (%s)", freq, ret, strerror(-ret));
2769 nla_put_failure:
2770         return -1;
2771 }
2772
2773
2774 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2775                                       struct hostapd_sta_add_params *params)
2776 {
2777         struct i802_bss *bss = priv;
2778         struct wpa_driver_nl80211_data *drv = bss->drv;
2779         struct nl_msg *msg;
2780         int ret = -ENOBUFS;
2781
2782         msg = nlmsg_alloc();
2783         if (!msg)
2784                 return -ENOMEM;
2785
2786         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2787                     0, NL80211_CMD_NEW_STATION, 0);
2788
2789         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2790         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2791         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2792         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2793                 params->supp_rates);
2794         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2795                     params->listen_interval);
2796         if (params->ht_capabilities) {
2797                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2798                         sizeof(*params->ht_capabilities),
2799                         params->ht_capabilities);
2800         }
2801
2802         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2803         if (ret)
2804                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2805                            "result: %d (%s)", ret, strerror(-ret));
2806         if (ret == -EEXIST)
2807                 ret = 0;
2808  nla_put_failure:
2809         return ret;
2810 }
2811
2812
2813 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2814 {
2815         struct i802_bss *bss = priv;
2816         struct wpa_driver_nl80211_data *drv = bss->drv;
2817         struct nl_msg *msg;
2818         int ret;
2819
2820         msg = nlmsg_alloc();
2821         if (!msg)
2822                 return -ENOMEM;
2823
2824         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2825                     0, NL80211_CMD_DEL_STATION, 0);
2826
2827         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2828                     if_nametoindex(bss->ifname));
2829         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2830
2831         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2832         if (ret == -ENOENT)
2833                 return 0;
2834         return ret;
2835  nla_put_failure:
2836         return -ENOBUFS;
2837 }
2838
2839
2840 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2841                                  int ifidx)
2842 {
2843         struct nl_msg *msg;
2844
2845         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
2846
2847 #ifdef HOSTAPD
2848         /* stop listening for EAPOL on this interface */
2849         del_ifidx(drv, ifidx);
2850 #endif /* HOSTAPD */
2851
2852         msg = nlmsg_alloc();
2853         if (!msg)
2854                 goto nla_put_failure;
2855
2856         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2857                     0, NL80211_CMD_DEL_INTERFACE, 0);
2858         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2859
2860         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2861                 return;
2862  nla_put_failure:
2863         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
2864 }
2865
2866
2867 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2868                                      const char *ifname,
2869                                      enum nl80211_iftype iftype,
2870                                      const u8 *addr, int wds)
2871 {
2872         struct nl_msg *msg, *flags = NULL;
2873         int ifidx;
2874         int ret = -ENOBUFS;
2875
2876         msg = nlmsg_alloc();
2877         if (!msg)
2878                 return -1;
2879
2880         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2881                     0, NL80211_CMD_NEW_INTERFACE, 0);
2882         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2883         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2884         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2885
2886         if (iftype == NL80211_IFTYPE_MONITOR) {
2887                 int err;
2888
2889                 flags = nlmsg_alloc();
2890                 if (!flags)
2891                         goto nla_put_failure;
2892
2893                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2894
2895                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2896
2897                 nlmsg_free(flags);
2898
2899                 if (err)
2900                         goto nla_put_failure;
2901         } else if (wds) {
2902                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
2903         }
2904
2905         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2906         if (ret) {
2907  nla_put_failure:
2908                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2909                            ifname, ret, strerror(-ret));
2910                 return ret;
2911         }
2912
2913         ifidx = if_nametoindex(ifname);
2914         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
2915                    ifname, ifidx);
2916
2917         if (ifidx <= 0)
2918                 return -1;
2919
2920 #ifdef HOSTAPD
2921         /* start listening for EAPOL on this interface */
2922         add_ifidx(drv, ifidx);
2923 #endif /* HOSTAPD */
2924
2925         if (addr && iftype != NL80211_IFTYPE_MONITOR &&
2926             linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
2927                 nl80211_remove_iface(drv, ifidx);
2928                 return -1;
2929         }
2930
2931         return ifidx;
2932 }
2933
2934
2935 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2936                                 const char *ifname, enum nl80211_iftype iftype,
2937                                 const u8 *addr, int wds)
2938 {
2939         int ret;
2940
2941         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
2942
2943         /* if error occured and interface exists already */
2944         if (ret == -ENFILE && if_nametoindex(ifname)) {
2945                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2946
2947                 /* Try to remove the interface that was already there. */
2948                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2949
2950                 /* Try to create the interface again */
2951                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
2952                                                 wds);
2953         }
2954
2955         if (ret >= 0 && drv->disable_11b_rates)
2956                 nl80211_disable_11b_rates(drv, ret, 1);
2957
2958         return ret;
2959 }
2960
2961
2962 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2963 {
2964         struct ieee80211_hdr *hdr;
2965         u16 fc;
2966         union wpa_event_data event;
2967
2968         hdr = (struct ieee80211_hdr *) buf;
2969         fc = le_to_host16(hdr->frame_control);
2970
2971         os_memset(&event, 0, sizeof(event));
2972         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
2973         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
2974         event.tx_status.dst = hdr->addr1;
2975         event.tx_status.data = buf;
2976         event.tx_status.data_len = len;
2977         event.tx_status.ack = ok;
2978         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
2979 }
2980
2981
2982 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2983                              u8 *buf, size_t len)
2984 {
2985         union wpa_event_data event;
2986         os_memset(&event, 0, sizeof(event));
2987         event.rx_from_unknown.frame = buf;
2988         event.rx_from_unknown.len = len;
2989         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
2990 }
2991
2992
2993 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2994                          u8 *buf, size_t len, int datarate, int ssi_signal)
2995 {
2996         struct ieee80211_hdr *hdr;
2997         u16 fc;
2998         union wpa_event_data event;
2999
3000         hdr = (struct ieee80211_hdr *) buf;
3001         fc = le_to_host16(hdr->frame_control);
3002
3003         switch (WLAN_FC_GET_TYPE(fc)) {
3004         case WLAN_FC_TYPE_MGMT:
3005                 os_memset(&event, 0, sizeof(event));
3006                 event.rx_mgmt.frame = buf;
3007                 event.rx_mgmt.frame_len = len;
3008                 event.rx_mgmt.datarate = datarate;
3009                 event.rx_mgmt.ssi_signal = ssi_signal;
3010                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
3011                 break;
3012         case WLAN_FC_TYPE_CTRL:
3013                 /* can only get here with PS-Poll frames */
3014                 wpa_printf(MSG_DEBUG, "CTRL");
3015                 from_unknown_sta(drv, buf, len);
3016                 break;
3017         case WLAN_FC_TYPE_DATA:
3018                 from_unknown_sta(drv, buf, len);
3019                 break;
3020         }
3021 }
3022
3023
3024 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
3025 {
3026         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3027         int len;
3028         unsigned char buf[3000];
3029         struct ieee80211_radiotap_iterator iter;
3030         int ret;
3031         int datarate = 0, ssi_signal = 0;
3032         int injected = 0, failed = 0, rxflags = 0;
3033
3034         len = recv(sock, buf, sizeof(buf), 0);
3035         if (len < 0) {
3036                 perror("recv");
3037                 return;
3038         }
3039
3040         if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
3041                 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
3042                            "frame since Probe Request reporting is disabled");
3043                 return;
3044         }
3045
3046         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
3047                 printf("received invalid radiotap frame\n");
3048                 return;
3049         }
3050
3051         while (1) {
3052                 ret = ieee80211_radiotap_iterator_next(&iter);
3053                 if (ret == -ENOENT)
3054                         break;
3055                 if (ret) {
3056                         printf("received invalid radiotap frame (%d)\n", ret);
3057                         return;
3058                 }
3059                 switch (iter.this_arg_index) {
3060                 case IEEE80211_RADIOTAP_FLAGS:
3061                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
3062                                 len -= 4;
3063                         break;
3064                 case IEEE80211_RADIOTAP_RX_FLAGS:
3065                         rxflags = 1;
3066                         break;
3067                 case IEEE80211_RADIOTAP_TX_FLAGS:
3068                         injected = 1;
3069                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3070                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3071                         break;
3072                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3073                         break;
3074                 case IEEE80211_RADIOTAP_CHANNEL:
3075                         /* TODO: convert from freq/flags to channel number */
3076                         break;
3077                 case IEEE80211_RADIOTAP_RATE:
3078                         datarate = *iter.this_arg * 5;
3079                         break;
3080                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3081                         ssi_signal = *iter.this_arg;
3082                         break;
3083                 }
3084         }
3085
3086         if (rxflags && injected)
3087                 return;
3088
3089         if (!injected)
3090                 handle_frame(drv, buf + iter.max_length,
3091                              len - iter.max_length, datarate, ssi_signal);
3092         else
3093                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3094                                    len - iter.max_length, !failed);
3095 }
3096
3097
3098 /*
3099  * we post-process the filter code later and rewrite
3100  * this to the offset to the last instruction
3101  */
3102 #define PASS    0xFF
3103 #define FAIL    0xFE
3104
3105 static struct sock_filter msock_filter_insns[] = {
3106         /*
3107          * do a little-endian load of the radiotap length field
3108          */
3109         /* load lower byte into A */
3110         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3111         /* put it into X (== index register) */
3112         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3113         /* load upper byte into A */
3114         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3115         /* left-shift it by 8 */
3116         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3117         /* or with X */
3118         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3119         /* put result into X */
3120         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3121
3122         /*
3123          * Allow management frames through, this also gives us those
3124          * management frames that we sent ourselves with status
3125          */
3126         /* load the lower byte of the IEEE 802.11 frame control field */
3127         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3128         /* mask off frame type and version */
3129         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3130         /* accept frame if it's both 0, fall through otherwise */
3131         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3132
3133         /*
3134          * TODO: add a bit to radiotap RX flags that indicates
3135          * that the sending station is not associated, then
3136          * add a filter here that filters on our DA and that flag
3137          * to allow us to deauth frames to that bad station.
3138          *
3139          * Not a regression -- we didn't do it before either.
3140          */
3141
3142 #if 0
3143         /*
3144          * drop non-data frames
3145          */
3146         /* load the lower byte of the frame control field */
3147         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3148         /* mask off QoS bit */
3149         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3150         /* drop non-data frames */
3151         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3152 #endif
3153         /* load the upper byte of the frame control field */
3154         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
3155         /* mask off toDS/fromDS */
3156         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3157         /* accept WDS frames */
3158         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
3159
3160         /*
3161          * add header length to index
3162          */
3163         /* load the lower byte of the frame control field */
3164         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3165         /* mask off QoS bit */
3166         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3167         /* right shift it by 6 to give 0 or 2 */
3168         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3169         /* add data frame header length */
3170         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3171         /* add index, was start of 802.11 header */
3172         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3173         /* move to index, now start of LL header */
3174         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3175
3176         /*
3177          * Accept empty data frames, we use those for
3178          * polling activity.
3179          */
3180         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3181         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3182
3183         /*
3184          * Accept EAPOL frames
3185          */
3186         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3187         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3188         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3189         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3190
3191         /* keep these last two statements or change the code below */
3192         /* return 0 == "DROP" */
3193         BPF_STMT(BPF_RET | BPF_K, 0),
3194         /* return ~0 == "keep all" */
3195         BPF_STMT(BPF_RET | BPF_K, ~0),
3196 };
3197
3198 static struct sock_fprog msock_filter = {
3199         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3200         .filter = msock_filter_insns,
3201 };
3202
3203
3204 static int add_monitor_filter(int s)
3205 {
3206         int idx;
3207
3208         /* rewrite all PASS/FAIL jump offsets */
3209         for (idx = 0; idx < msock_filter.len; idx++) {
3210                 struct sock_filter *insn = &msock_filter_insns[idx];
3211
3212                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3213                         if (insn->code == (BPF_JMP|BPF_JA)) {
3214                                 if (insn->k == PASS)
3215                                         insn->k = msock_filter.len - idx - 2;
3216                                 else if (insn->k == FAIL)
3217                                         insn->k = msock_filter.len - idx - 3;
3218                         }
3219
3220                         if (insn->jt == PASS)
3221                                 insn->jt = msock_filter.len - idx - 2;
3222                         else if (insn->jt == FAIL)
3223                                 insn->jt = msock_filter.len - idx - 3;
3224
3225                         if (insn->jf == PASS)
3226                                 insn->jf = msock_filter.len - idx - 2;
3227                         else if (insn->jf == FAIL)
3228                                 insn->jf = msock_filter.len - idx - 3;
3229                 }
3230         }
3231
3232         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3233                        &msock_filter, sizeof(msock_filter))) {
3234                 perror("SO_ATTACH_FILTER");
3235                 return -1;
3236         }
3237
3238         return 0;
3239 }
3240
3241
3242 static void nl80211_remove_monitor_interface(
3243         struct wpa_driver_nl80211_data *drv)
3244 {
3245         if (drv->monitor_ifidx >= 0) {
3246                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3247                 drv->monitor_ifidx = -1;
3248         }
3249         if (drv->monitor_sock >= 0) {
3250                 eloop_unregister_read_sock(drv->monitor_sock);
3251                 close(drv->monitor_sock);
3252                 drv->monitor_sock = -1;
3253         }
3254 }
3255
3256
3257 static int
3258 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3259 {
3260         char buf[IFNAMSIZ];
3261         struct sockaddr_ll ll;
3262         int optval;
3263         socklen_t optlen;
3264
3265         snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
3266         buf[IFNAMSIZ - 1] = '\0';
3267
3268         drv->monitor_ifidx =
3269                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3270                                      0);
3271
3272         if (drv->monitor_ifidx < 0)
3273                 return -1;
3274
3275         if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3276                 goto error;
3277
3278         memset(&ll, 0, sizeof(ll));
3279         ll.sll_family = AF_PACKET;
3280         ll.sll_ifindex = drv->monitor_ifidx;
3281         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3282         if (drv->monitor_sock < 0) {
3283                 perror("socket[PF_PACKET,SOCK_RAW]");
3284                 goto error;
3285         }
3286
3287         if (add_monitor_filter(drv->monitor_sock)) {
3288                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3289                            "interface; do filtering in user space");
3290                 /* This works, but will cost in performance. */
3291         }
3292
3293         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3294                 perror("monitor socket bind");
3295                 goto error;
3296         }
3297
3298         optlen = sizeof(optval);
3299         optval = 20;
3300         if (setsockopt
3301             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3302                 perror("Failed to set socket priority");
3303                 goto error;
3304         }
3305
3306         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3307                                      drv, NULL)) {
3308                 printf("Could not register monitor read socket\n");
3309                 goto error;
3310         }
3311
3312         return 0;
3313  error:
3314         nl80211_remove_monitor_interface(drv);
3315         return -1;
3316 }
3317
3318
3319 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3320
3321 static int wpa_driver_nl80211_hapd_send_eapol(
3322         void *priv, const u8 *addr, const u8 *data,
3323         size_t data_len, int encrypt, const u8 *own_addr)
3324 {
3325         struct i802_bss *bss = priv;
3326         struct wpa_driver_nl80211_data *drv = bss->drv;
3327         struct ieee80211_hdr *hdr;
3328         size_t len;
3329         u8 *pos;
3330         int res;
3331 #if 0 /* FIX */
3332         int qos = sta->flags & WPA_STA_WMM;
3333 #else
3334         int qos = 0;
3335 #endif
3336
3337         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3338                 data_len;
3339         hdr = os_zalloc(len);
3340         if (hdr == NULL) {
3341                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3342                        (unsigned long) len);
3343                 return -1;
3344         }
3345
3346         hdr->frame_control =
3347                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3348         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3349         if (encrypt)
3350                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3351 #if 0 /* To be enabled if qos determination is added above */
3352         if (qos) {
3353                 hdr->frame_control |=
3354                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3355         }
3356 #endif
3357
3358         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3359         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3360         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3361         pos = (u8 *) (hdr + 1);
3362
3363 #if 0 /* To be enabled if qos determination is added above */
3364         if (qos) {
3365                 /* add an empty QoS header if needed */
3366                 pos[0] = 0;
3367                 pos[1] = 0;
3368                 pos += 2;
3369         }
3370 #endif
3371
3372         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3373         pos += sizeof(rfc1042_header);
3374         WPA_PUT_BE16(pos, ETH_P_PAE);
3375         pos += 2;
3376         memcpy(pos, data, data_len);
3377
3378         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3379         if (res < 0) {
3380                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3381                            "failed: %d (%s)",
3382                            (unsigned long) len, errno, strerror(errno));
3383         }
3384         os_free(hdr);
3385
3386         return res;
3387 }
3388
3389
3390 static u32 sta_flags_nl80211(int flags)
3391 {
3392         u32 f = 0;
3393
3394         if (flags & WPA_STA_AUTHORIZED)
3395                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3396         if (flags & WPA_STA_WMM)
3397                 f |= BIT(NL80211_STA_FLAG_WME);
3398         if (flags & WPA_STA_SHORT_PREAMBLE)
3399                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3400         if (flags & WPA_STA_MFP)
3401                 f |= BIT(NL80211_STA_FLAG_MFP);
3402
3403         return f;
3404 }
3405
3406
3407 static int wpa_driver_nl80211_sta_set_flags(const char *ifname, void *priv,
3408                                             const u8 *addr, int total_flags,
3409                                             int flags_or, int flags_and)
3410 {
3411         struct i802_bss *bss = priv;
3412         struct wpa_driver_nl80211_data *drv = bss->drv;
3413         struct nl_msg *msg, *flags = NULL;
3414         struct nl80211_sta_flag_update upd;
3415
3416         msg = nlmsg_alloc();
3417         if (!msg)
3418                 return -ENOMEM;
3419
3420         flags = nlmsg_alloc();
3421         if (!flags) {
3422                 nlmsg_free(msg);
3423                 return -ENOMEM;
3424         }
3425
3426         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3427                     0, NL80211_CMD_SET_STATION, 0);
3428
3429         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3430                     if_nametoindex(ifname));
3431         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3432
3433         /*
3434          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3435          * can be removed eventually.
3436          */
3437         if (total_flags & WPA_STA_AUTHORIZED)
3438                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3439
3440         if (total_flags & WPA_STA_WMM)
3441                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3442
3443         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3444                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3445
3446         if (total_flags & WPA_STA_MFP)
3447                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3448
3449         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3450                 goto nla_put_failure;
3451
3452         os_memset(&upd, 0, sizeof(upd));
3453         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3454         upd.set = sta_flags_nl80211(flags_or);
3455         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3456
3457         nlmsg_free(flags);
3458
3459         return send_and_recv_msgs(drv, msg, NULL, NULL);
3460  nla_put_failure:
3461         nlmsg_free(flags);
3462         return -ENOBUFS;
3463 }
3464
3465
3466 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3467                                  struct wpa_driver_associate_params *params)
3468 {
3469         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode) ||
3470             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3471                 nl80211_remove_monitor_interface(drv);
3472                 return -1;
3473         }
3474
3475         /* TODO: setup monitor interface (and add code somewhere to remove this
3476          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3477
3478         return 0;
3479 }
3480
3481
3482 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3483 {
3484         struct nl_msg *msg;
3485         int ret = -1;
3486
3487         msg = nlmsg_alloc();
3488         if (!msg)
3489                 return -1;
3490
3491         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3492                     NL80211_CMD_LEAVE_IBSS, 0);
3493         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3494         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3495         msg = NULL;
3496         if (ret) {
3497                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3498                            "(%s)", ret, strerror(-ret));
3499                 goto nla_put_failure;
3500         }
3501
3502         ret = 0;
3503         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3504
3505 nla_put_failure:
3506         nlmsg_free(msg);
3507         return ret;
3508 }
3509
3510
3511 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3512                                    struct wpa_driver_associate_params *params)
3513 {
3514         struct nl_msg *msg;
3515         int ret = -1;
3516         int count = 0;
3517
3518         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3519
3520         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode)) {
3521                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3522                            "IBSS mode");
3523                 return -1;
3524         }
3525
3526 retry:
3527         msg = nlmsg_alloc();
3528         if (!msg)
3529                 return -1;
3530
3531         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3532                     NL80211_CMD_JOIN_IBSS, 0);
3533         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3534
3535         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3536                 goto nla_put_failure;
3537
3538         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3539                           params->ssid, params->ssid_len);
3540         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3541                 params->ssid);
3542         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3543         drv->ssid_len = params->ssid_len;
3544
3545         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3546         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3547
3548         ret = nl80211_set_conn_keys(params, msg);
3549         if (ret)
3550                 goto nla_put_failure;
3551
3552         if (params->wpa_ie) {
3553                 wpa_hexdump(MSG_DEBUG,
3554                             "  * Extra IEs for Beacon/Probe Response frames",
3555                             params->wpa_ie, params->wpa_ie_len);
3556                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3557                         params->wpa_ie);
3558         }
3559
3560         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3561         msg = NULL;
3562         if (ret) {
3563                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3564                            ret, strerror(-ret));
3565                 count++;
3566                 if (ret == -EALREADY && count == 1) {
3567                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3568                                    "forced leave");
3569                         nl80211_leave_ibss(drv);
3570                         nlmsg_free(msg);
3571                         goto retry;
3572                 }
3573
3574                 goto nla_put_failure;
3575         }
3576         ret = 0;
3577         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3578
3579 nla_put_failure:
3580         nlmsg_free(msg);
3581         return ret;
3582 }
3583
3584
3585 static int wpa_driver_nl80211_connect(
3586         struct wpa_driver_nl80211_data *drv,
3587         struct wpa_driver_associate_params *params)
3588 {
3589         struct nl_msg *msg;
3590         enum nl80211_auth_type type;
3591         int ret = 0;
3592
3593         msg = nlmsg_alloc();
3594         if (!msg)
3595                 return -1;
3596
3597         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3598         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3599                     NL80211_CMD_CONNECT, 0);
3600
3601         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3602         if (params->bssid) {
3603                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3604                            MAC2STR(params->bssid));
3605                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3606         }
3607         if (params->freq) {
3608                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3609                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3610         }
3611         if (params->ssid) {
3612                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3613                                   params->ssid, params->ssid_len);
3614                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3615                         params->ssid);
3616                 if (params->ssid_len > sizeof(drv->ssid))
3617                         goto nla_put_failure;
3618                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3619                 drv->ssid_len = params->ssid_len;
3620         }
3621         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3622         if (params->wpa_ie)
3623                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3624                         params->wpa_ie);
3625
3626         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3627                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3628         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3629                 type = NL80211_AUTHTYPE_SHARED_KEY;
3630         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3631                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3632         else if (params->auth_alg & WPA_AUTH_ALG_FT)
3633                 type = NL80211_AUTHTYPE_FT;
3634         else
3635                 goto nla_put_failure;
3636
3637         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3638         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3639
3640         if (params->wpa_ie && params->wpa_ie_len) {
3641                 enum nl80211_wpa_versions ver;
3642
3643                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3644                         ver = NL80211_WPA_VERSION_2;
3645                 else
3646                         ver = NL80211_WPA_VERSION_1;
3647
3648                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3649                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3650         }
3651
3652         if (params->pairwise_suite != CIPHER_NONE) {
3653                 int cipher;
3654
3655                 switch (params->pairwise_suite) {
3656                 case CIPHER_WEP40:
3657                         cipher = WLAN_CIPHER_SUITE_WEP40;
3658                         break;
3659                 case CIPHER_WEP104:
3660                         cipher = WLAN_CIPHER_SUITE_WEP104;
3661                         break;
3662                 case CIPHER_CCMP:
3663                         cipher = WLAN_CIPHER_SUITE_CCMP;
3664                         break;
3665                 case CIPHER_TKIP:
3666                 default:
3667                         cipher = WLAN_CIPHER_SUITE_TKIP;
3668                         break;
3669                 }
3670                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3671         }
3672
3673         if (params->group_suite != CIPHER_NONE) {
3674                 int cipher;
3675
3676                 switch (params->group_suite) {
3677                 case CIPHER_WEP40:
3678                         cipher = WLAN_CIPHER_SUITE_WEP40;
3679                         break;
3680                 case CIPHER_WEP104:
3681                         cipher = WLAN_CIPHER_SUITE_WEP104;
3682                         break;
3683                 case CIPHER_CCMP:
3684                         cipher = WLAN_CIPHER_SUITE_CCMP;
3685                         break;
3686                 case CIPHER_TKIP:
3687                 default:
3688                         cipher = WLAN_CIPHER_SUITE_TKIP;
3689                         break;
3690                 }
3691                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3692         }
3693
3694         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3695             params->key_mgmt_suite == KEY_MGMT_PSK) {
3696                 int mgmt = WLAN_AKM_SUITE_PSK;
3697
3698                 switch (params->key_mgmt_suite) {
3699                 case KEY_MGMT_802_1X:
3700                         mgmt = WLAN_AKM_SUITE_8021X;
3701                         break;
3702                 case KEY_MGMT_PSK:
3703                 default:
3704                         mgmt = WLAN_AKM_SUITE_PSK;
3705                         break;
3706                 }
3707                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3708         }
3709
3710         ret = nl80211_set_conn_keys(params, msg);
3711         if (ret)
3712                 goto nla_put_failure;
3713
3714         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3715         msg = NULL;
3716         if (ret) {
3717                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3718                            "(%s)", ret, strerror(-ret));
3719                 goto nla_put_failure;
3720         }
3721         ret = 0;
3722         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3723
3724 nla_put_failure:
3725         nlmsg_free(msg);
3726         return ret;
3727
3728 }
3729
3730
3731 static int wpa_driver_nl80211_associate(
3732         void *priv, struct wpa_driver_associate_params *params)
3733 {
3734         struct i802_bss *bss = priv;
3735         struct wpa_driver_nl80211_data *drv = bss->drv;
3736         int ret = -1;
3737         struct nl_msg *msg;
3738
3739         if (params->mode == IEEE80211_MODE_AP)
3740                 return wpa_driver_nl80211_ap(drv, params);
3741
3742         if (params->mode == IEEE80211_MODE_IBSS)
3743                 return wpa_driver_nl80211_ibss(drv, params);
3744
3745         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3746                 if (wpa_driver_nl80211_set_mode(priv, params->mode) < 0)
3747                         return -1;
3748                 return wpa_driver_nl80211_connect(drv, params);
3749         }
3750
3751         drv->associated = 0;
3752
3753         msg = nlmsg_alloc();
3754         if (!msg)
3755                 return -1;
3756
3757         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3758                    drv->ifindex);
3759         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3760                     NL80211_CMD_ASSOCIATE, 0);
3761
3762         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3763         if (params->bssid) {
3764                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3765                            MAC2STR(params->bssid));
3766                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3767         }
3768         if (params->freq) {
3769                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3770                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3771                 drv->assoc_freq = params->freq;
3772         } else
3773                 drv->assoc_freq = 0;
3774         if (params->ssid) {
3775                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3776                                   params->ssid, params->ssid_len);
3777                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3778                         params->ssid);
3779                 if (params->ssid_len > sizeof(drv->ssid))
3780                         goto nla_put_failure;
3781                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3782                 drv->ssid_len = params->ssid_len;
3783         }
3784         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3785         if (params->wpa_ie)
3786                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3787                         params->wpa_ie);
3788
3789 #ifdef CONFIG_IEEE80211W
3790         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3791                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3792 #endif /* CONFIG_IEEE80211W */
3793
3794         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3795
3796         if (params->prev_bssid) {
3797                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3798                            MAC2STR(params->prev_bssid));
3799                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3800                         params->prev_bssid);
3801         }
3802
3803         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3804         msg = NULL;
3805         if (ret) {
3806                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3807                            "(%s)", ret, strerror(-ret));
3808                 nl80211_dump_scan(drv);
3809                 goto nla_put_failure;
3810         }
3811         ret = 0;
3812         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3813                    "successfully");
3814
3815 nla_put_failure:
3816         nlmsg_free(msg);
3817         return ret;
3818 }
3819
3820
3821 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3822                             int ifindex, int mode)
3823 {
3824         struct nl_msg *msg;
3825         int ret = -ENOBUFS;
3826
3827         msg = nlmsg_alloc();
3828         if (!msg)
3829                 return -ENOMEM;
3830
3831         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3832                     0, NL80211_CMD_SET_INTERFACE, 0);
3833         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3834         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3835
3836         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3837         if (!ret)
3838                 return 0;
3839 nla_put_failure:
3840         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3841                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3842         return ret;
3843 }
3844
3845
3846 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3847 {
3848         struct i802_bss *bss = priv;
3849         struct wpa_driver_nl80211_data *drv = bss->drv;
3850         int ret = -1;
3851         int nlmode;
3852
3853         switch (mode) {
3854         case 0:
3855                 nlmode = NL80211_IFTYPE_STATION;
3856                 break;
3857         case 1:
3858                 nlmode = NL80211_IFTYPE_ADHOC;
3859                 break;
3860         case 2:
3861                 nlmode = NL80211_IFTYPE_AP;
3862                 break;
3863         default:
3864                 return -1;
3865         }
3866
3867         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3868                 drv->nlmode = nlmode;
3869                 ret = 0;
3870                 goto done;
3871         }
3872
3873         if (nlmode == drv->nlmode) {
3874                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
3875                            "requested mode - ignore error");
3876                 ret = 0;
3877                 goto done; /* Already in the requested mode */
3878         }
3879
3880         /* mac80211 doesn't allow mode changes while the device is up, so
3881          * take the device down, try to set the mode again, and bring the
3882          * device back up.
3883          */
3884         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) == 0) {
3885                 /* Try to set the mode again while the interface is down */
3886                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3887                 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
3888                         ret = -1;
3889         }
3890
3891         if (!ret) {
3892                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
3893                            "interface is down");
3894                 drv->nlmode = nlmode;
3895         }
3896
3897 done:
3898         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3899                 /* Setup additional AP mode functionality if needed */
3900                 if (drv->monitor_ifidx < 0 &&
3901                     nl80211_create_monitor_interface(drv))
3902                         return -1;
3903         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3904                 /* Remove additional AP mode functionality */
3905                 nl80211_remove_monitor_interface(drv);
3906                 bss->beacon_set = 0;
3907         }
3908
3909         if (ret)
3910                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
3911                            "from %d failed", nlmode, drv->nlmode);
3912
3913         return ret;
3914 }
3915
3916
3917 static int wpa_driver_nl80211_get_capa(void *priv,
3918                                        struct wpa_driver_capa *capa)
3919 {
3920         struct i802_bss *bss = priv;
3921         struct wpa_driver_nl80211_data *drv = bss->drv;
3922         if (!drv->has_capability)
3923                 return -1;
3924         os_memcpy(capa, &drv->capa, sizeof(*capa));
3925         return 0;
3926 }
3927
3928
3929 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3930 {
3931         struct i802_bss *bss = priv;
3932         struct wpa_driver_nl80211_data *drv = bss->drv;
3933
3934         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3935                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3936         drv->operstate = state;
3937         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
3938                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
3939 }
3940
3941
3942 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3943 {
3944         struct i802_bss *bss = priv;
3945         struct wpa_driver_nl80211_data *drv = bss->drv;
3946         struct nl_msg *msg;
3947         struct nl80211_sta_flag_update upd;
3948
3949         msg = nlmsg_alloc();
3950         if (!msg)
3951                 return -ENOMEM;
3952
3953         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3954                     0, NL80211_CMD_SET_STATION, 0);
3955
3956         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3957                     if_nametoindex(bss->ifname));
3958         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3959
3960         os_memset(&upd, 0, sizeof(upd));
3961         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3962         if (authorized)
3963                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3964         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3965
3966         return send_and_recv_msgs(drv, msg, NULL, NULL);
3967  nla_put_failure:
3968         return -ENOBUFS;
3969 }
3970
3971
3972 #ifdef HOSTAPD
3973
3974 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3975 {
3976         int i;
3977         int *old;
3978
3979         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3980                    ifidx);
3981         for (i = 0; i < drv->num_if_indices; i++) {
3982                 if (drv->if_indices[i] == 0) {
3983                         drv->if_indices[i] = ifidx;
3984                         return;
3985                 }
3986         }
3987
3988         if (drv->if_indices != drv->default_if_indices)
3989                 old = drv->if_indices;
3990         else
3991                 old = NULL;
3992
3993         drv->if_indices = os_realloc(old,
3994                                      sizeof(int) * (drv->num_if_indices + 1));
3995         if (!drv->if_indices) {
3996                 if (!old)
3997                         drv->if_indices = drv->default_if_indices;
3998                 else
3999                         drv->if_indices = old;
4000                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
4001                            "interfaces");
4002                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
4003                 return;
4004         }
4005         drv->if_indices[drv->num_if_indices] = ifidx;
4006         drv->num_if_indices++;
4007 }
4008
4009
4010 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4011 {
4012         int i;
4013
4014         for (i = 0; i < drv->num_if_indices; i++) {
4015                 if (drv->if_indices[i] == ifidx) {
4016                         drv->if_indices[i] = 0;
4017                         break;
4018                 }
4019         }
4020 }
4021
4022
4023 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4024 {
4025         int i;
4026
4027         for (i = 0; i < drv->num_if_indices; i++)
4028                 if (drv->if_indices[i] == ifidx)
4029                         return 1;
4030
4031         return 0;
4032 }
4033
4034
4035 static inline int min_int(int a, int b)
4036 {
4037         if (a < b)
4038                 return a;
4039         return b;
4040 }
4041
4042
4043 static int get_key_handler(struct nl_msg *msg, void *arg)
4044 {
4045         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4046         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4047
4048         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4049                   genlmsg_attrlen(gnlh, 0), NULL);
4050
4051         /*
4052          * TODO: validate the key index and mac address!
4053          * Otherwise, there's a race condition as soon as
4054          * the kernel starts sending key notifications.
4055          */
4056
4057         if (tb[NL80211_ATTR_KEY_SEQ])
4058                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4059                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4060         return NL_SKIP;
4061 }
4062
4063
4064 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4065                            int idx, u8 *seq)
4066 {
4067         struct i802_bss *bss = priv;
4068         struct wpa_driver_nl80211_data *drv = bss->drv;
4069         struct nl_msg *msg;
4070
4071         msg = nlmsg_alloc();
4072         if (!msg)
4073                 return -ENOMEM;
4074
4075         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4076                     0, NL80211_CMD_GET_KEY, 0);
4077
4078         if (addr)
4079                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4080         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4081         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4082
4083         memset(seq, 0, 6);
4084
4085         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4086  nla_put_failure:
4087         return -ENOBUFS;
4088 }
4089
4090
4091 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4092                               int mode)
4093 {
4094         struct i802_bss *bss = priv;
4095         struct wpa_driver_nl80211_data *drv = bss->drv;
4096         struct nl_msg *msg;
4097         u8 rates[NL80211_MAX_SUPP_RATES];
4098         u8 rates_len = 0;
4099         int i;
4100
4101         msg = nlmsg_alloc();
4102         if (!msg)
4103                 return -ENOMEM;
4104
4105         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4106                     NL80211_CMD_SET_BSS, 0);
4107
4108         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4109                 rates[rates_len++] = basic_rates[i] / 5;
4110
4111         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4112
4113         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4114
4115         return send_and_recv_msgs(drv, msg, NULL, NULL);
4116  nla_put_failure:
4117         return -ENOBUFS;
4118 }
4119
4120
4121 /* Set kernel driver on given frequency (MHz) */
4122 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4123 {
4124         struct i802_bss *bss = priv;
4125         struct wpa_driver_nl80211_data *drv = bss->drv;
4126         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4127                                            freq->sec_channel_offset);
4128 }
4129
4130
4131 static int i802_set_rts(void *priv, int rts)
4132 {
4133         struct i802_bss *bss = priv;
4134         struct wpa_driver_nl80211_data *drv = bss->drv;
4135         struct nl_msg *msg;
4136         int ret = -ENOBUFS;
4137         u32 val;
4138
4139         msg = nlmsg_alloc();
4140         if (!msg)
4141                 return -ENOMEM;
4142
4143         if (rts >= 2347)
4144                 val = (u32) -1;
4145         else
4146                 val = rts;
4147
4148         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4149                     0, NL80211_CMD_SET_WIPHY, 0);
4150         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4151         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4152
4153         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4154         if (!ret)
4155                 return 0;
4156 nla_put_failure:
4157         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4158                    "%d (%s)", rts, ret, strerror(-ret));
4159         return ret;
4160 }
4161
4162
4163 static int i802_set_frag(void *priv, int frag)
4164 {
4165         struct i802_bss *bss = priv;
4166         struct wpa_driver_nl80211_data *drv = bss->drv;
4167         struct nl_msg *msg;
4168         int ret = -ENOBUFS;
4169         u32 val;
4170
4171         msg = nlmsg_alloc();
4172         if (!msg)
4173                 return -ENOMEM;
4174
4175         if (frag >= 2346)
4176                 val = (u32) -1;
4177         else
4178                 val = frag;
4179
4180         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4181                     0, NL80211_CMD_SET_WIPHY, 0);
4182         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4183         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4184
4185         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4186         if (!ret)
4187                 return 0;
4188 nla_put_failure:
4189         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4190                    "%d: %d (%s)", frag, ret, strerror(-ret));
4191         return ret;
4192 }
4193
4194
4195 static int i802_flush(void *priv)
4196 {
4197         struct i802_bss *bss = priv;
4198         struct wpa_driver_nl80211_data *drv = bss->drv;
4199         struct nl_msg *msg;
4200
4201         msg = nlmsg_alloc();
4202         if (!msg)
4203                 return -1;
4204
4205         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4206                     0, NL80211_CMD_DEL_STATION, 0);
4207
4208         /*
4209          * XXX: FIX! this needs to flush all VLANs too
4210          */
4211         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4212                     if_nametoindex(bss->ifname));
4213
4214         return send_and_recv_msgs(drv, msg, NULL, NULL);
4215  nla_put_failure:
4216         return -ENOBUFS;
4217 }
4218
4219
4220 static int get_sta_handler(struct nl_msg *msg, void *arg)
4221 {
4222         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4223         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4224         struct hostap_sta_driver_data *data = arg;
4225         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4226         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4227                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4228                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4229                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4230                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4231                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4232         };
4233
4234         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4235                   genlmsg_attrlen(gnlh, 0), NULL);
4236
4237         /*
4238          * TODO: validate the interface and mac address!
4239          * Otherwise, there's a race condition as soon as
4240          * the kernel starts sending station notifications.
4241          */
4242
4243         if (!tb[NL80211_ATTR_STA_INFO]) {
4244                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4245                 return NL_SKIP;
4246         }
4247         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4248                              tb[NL80211_ATTR_STA_INFO],
4249                              stats_policy)) {
4250                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4251                 return NL_SKIP;
4252         }
4253
4254         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4255                 data->inactive_msec =
4256                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4257         if (stats[NL80211_STA_INFO_RX_BYTES])
4258                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4259         if (stats[NL80211_STA_INFO_TX_BYTES])
4260                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4261         if (stats[NL80211_STA_INFO_RX_PACKETS])
4262                 data->rx_packets =
4263                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4264         if (stats[NL80211_STA_INFO_TX_PACKETS])
4265                 data->tx_packets =
4266                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4267
4268         return NL_SKIP;
4269 }
4270
4271 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4272                               const u8 *addr)
4273 {
4274         struct i802_bss *bss = priv;
4275         struct wpa_driver_nl80211_data *drv = bss->drv;
4276         struct nl_msg *msg;
4277
4278         os_memset(data, 0, sizeof(*data));
4279         msg = nlmsg_alloc();
4280         if (!msg)
4281                 return -ENOMEM;
4282
4283         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4284                     0, NL80211_CMD_GET_STATION, 0);
4285
4286         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4287         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4288
4289         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4290  nla_put_failure:
4291         return -ENOBUFS;
4292 }
4293
4294
4295 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4296                                     int cw_min, int cw_max, int burst_time)
4297 {
4298         struct i802_bss *bss = priv;
4299         struct wpa_driver_nl80211_data *drv = bss->drv;
4300         struct nl_msg *msg;
4301         struct nlattr *txq, *params;
4302
4303         msg = nlmsg_alloc();
4304         if (!msg)
4305                 return -1;
4306
4307         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4308                     0, NL80211_CMD_SET_WIPHY, 0);
4309
4310         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4311
4312         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4313         if (!txq)
4314                 goto nla_put_failure;
4315
4316         /* We are only sending parameters for a single TXQ at a time */
4317         params = nla_nest_start(msg, 1);
4318         if (!params)
4319                 goto nla_put_failure;
4320
4321         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4322         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4323          * 32 usec, so need to convert the value here. */
4324         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4325         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4326         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4327         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4328
4329         nla_nest_end(msg, params);
4330
4331         nla_nest_end(msg, txq);
4332
4333         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4334                 return 0;
4335  nla_put_failure:
4336         return -1;
4337 }
4338
4339
4340 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4341 {
4342         struct i802_bss *bss = priv;
4343         struct wpa_driver_nl80211_data *drv = bss->drv;
4344         struct nl_msg *msg;
4345
4346         msg = nlmsg_alloc();
4347         if (!msg)
4348                 return -ENOMEM;
4349
4350         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4351                     NL80211_CMD_SET_BSS, 0);
4352
4353         if (cts >= 0)
4354                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4355         if (preamble >= 0)
4356                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4357         if (slot >= 0)
4358                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4359
4360         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4361
4362         return send_and_recv_msgs(drv, msg, NULL, NULL);
4363  nla_put_failure:
4364         return -ENOBUFS;
4365 }
4366
4367
4368 static int i802_set_cts_protect(void *priv, int value)
4369 {
4370         return i802_set_bss(priv, value, -1, -1);
4371 }
4372
4373
4374 static int i802_set_preamble(void *priv, int value)
4375 {
4376         return i802_set_bss(priv, -1, value, -1);
4377 }
4378
4379
4380 static int i802_set_short_slot_time(void *priv, int value)
4381 {
4382         return i802_set_bss(priv, -1, -1, value);
4383 }
4384
4385
4386 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4387                              const char *ifname, int vlan_id)
4388 {
4389         struct i802_bss *bss = priv;
4390         struct wpa_driver_nl80211_data *drv = bss->drv;
4391         struct nl_msg *msg;
4392
4393         msg = nlmsg_alloc();
4394         if (!msg)
4395                 return -ENOMEM;
4396
4397         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4398                     0, NL80211_CMD_SET_STATION, 0);
4399
4400         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4401                     if_nametoindex(bss->ifname));
4402         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4403         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4404                     if_nametoindex(ifname));
4405
4406         return send_and_recv_msgs(drv, msg, NULL, NULL);
4407  nla_put_failure:
4408         return -ENOBUFS;
4409 }
4410
4411
4412 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4413 {
4414         struct i802_bss *bss = priv;
4415         struct wpa_driver_nl80211_data *drv = bss->drv;
4416         char name[IFNAMSIZ + 1];
4417
4418         os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
4419         wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
4420                    " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
4421         if (val) {
4422                 if (nl80211_create_iface(drv, name, NL80211_IFTYPE_AP_VLAN,
4423                                          NULL, 1) < 0)
4424                         return -1;
4425                 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4426                 return i802_set_sta_vlan(priv, addr, name, 0);
4427         } else {
4428                 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
4429                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4430                                                     name);
4431         }
4432 }
4433
4434
4435 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4436 {
4437         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4438         struct sockaddr_ll lladdr;
4439         unsigned char buf[3000];
4440         int len;
4441         socklen_t fromlen = sizeof(lladdr);
4442
4443         len = recvfrom(sock, buf, sizeof(buf), 0,
4444                        (struct sockaddr *)&lladdr, &fromlen);
4445         if (len < 0) {
4446                 perror("recv");
4447                 return;
4448         }
4449
4450         if (have_ifidx(drv, lladdr.sll_ifindex))
4451                 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4452 }
4453
4454
4455 static int i802_get_inact_sec(void *priv, const u8 *addr)
4456 {
4457         struct hostap_sta_driver_data data;
4458         int ret;
4459
4460         data.inactive_msec = (unsigned long) -1;
4461         ret = i802_read_sta_data(priv, &data, addr);
4462         if (ret || data.inactive_msec == (unsigned long) -1)
4463                 return -1;
4464         return data.inactive_msec / 1000;
4465 }
4466
4467
4468 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4469 {
4470 #if 0
4471         /* TODO */
4472 #endif
4473         return 0;
4474 }
4475
4476
4477 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4478                            int reason)
4479 {
4480         struct i802_bss *bss = priv;
4481         struct ieee80211_mgmt mgmt;
4482
4483         memset(&mgmt, 0, sizeof(mgmt));
4484         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4485                                           WLAN_FC_STYPE_DEAUTH);
4486         memcpy(mgmt.da, addr, ETH_ALEN);
4487         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4488         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4489         mgmt.u.deauth.reason_code = host_to_le16(reason);
4490         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4491                                             IEEE80211_HDRLEN +
4492                                             sizeof(mgmt.u.deauth));
4493 }
4494
4495
4496 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4497                              int reason)
4498 {
4499         struct i802_bss *bss = priv;
4500         struct ieee80211_mgmt mgmt;
4501
4502         memset(&mgmt, 0, sizeof(mgmt));
4503         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4504                                           WLAN_FC_STYPE_DISASSOC);
4505         memcpy(mgmt.da, addr, ETH_ALEN);
4506         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4507         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4508         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4509         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4510                                             IEEE80211_HDRLEN +
4511                                             sizeof(mgmt.u.disassoc));
4512 }
4513
4514
4515 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
4516                              const char *brname, const char *ifname)
4517 {
4518         int ifindex;
4519         char in_br[IFNAMSIZ];
4520
4521         os_strlcpy(drv->brname, brname, IFNAMSIZ);
4522         ifindex = if_nametoindex(brname);
4523         if (ifindex == 0) {
4524                 /*
4525                  * Bridge was configured, but the bridge device does
4526                  * not exist. Try to add it now.
4527                  */
4528                 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
4529                         wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
4530                                    "bridge interface %s: %s",
4531                                    brname, strerror(errno));
4532                         return -1;
4533                 }
4534                 drv->added_bridge = 1;
4535                 add_ifidx(drv, if_nametoindex(brname));
4536         }
4537
4538         if (linux_br_get(in_br, ifname) == 0) {
4539                 if (os_strcmp(in_br, brname) == 0)
4540                         return 0; /* already in the bridge */
4541
4542                 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
4543                            "bridge %s", ifname, in_br);
4544                 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
4545                         wpa_printf(MSG_ERROR, "nl80211: Failed to "
4546                                    "remove interface %s from bridge "
4547                                    "%s: %s",
4548                                    ifname, brname, strerror(errno));
4549                         return -1;
4550                 }
4551         }
4552
4553         wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
4554                    ifname, brname);
4555         if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
4556                 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
4557                            "into bridge %s: %s",
4558                            ifname, brname, strerror(errno));
4559                 return -1;
4560         }
4561         drv->added_if_into_bridge = 1;
4562
4563         return 0;
4564 }
4565
4566
4567 static void *i802_init(struct hostapd_data *hapd,
4568                        struct wpa_init_params *params)
4569 {
4570         struct wpa_driver_nl80211_data *drv;
4571         struct i802_bss *bss;
4572         size_t i;
4573         char brname[IFNAMSIZ];
4574         int ifindex, br_ifindex;
4575         int br_added = 0;
4576
4577         bss = wpa_driver_nl80211_init(hapd, params->ifname);
4578         if (bss == NULL)
4579                 return NULL;
4580
4581         drv = bss->drv;
4582         if (linux_br_get(brname, params->ifname) == 0) {
4583                 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
4584                            params->ifname, brname);
4585                 br_ifindex = if_nametoindex(brname);
4586         } else {
4587                 brname[0] = '\0';
4588                 br_ifindex = 0;
4589         }
4590
4591         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4592         drv->if_indices = drv->default_if_indices;
4593         for (i = 0; i < params->num_bridge; i++) {
4594                 if (params->bridge[i]) {
4595                         ifindex = if_nametoindex(params->bridge[i]);
4596                         if (ifindex)
4597                                 add_ifidx(drv, ifindex);
4598                         if (ifindex == br_ifindex)
4599                                 br_added = 1;
4600                 }
4601         }
4602         if (!br_added && br_ifindex &&
4603             (params->num_bridge == 0 || !params->bridge[0]))
4604                 add_ifidx(drv, br_ifindex);
4605
4606         /* start listening for EAPOL on the default AP interface */
4607         add_ifidx(drv, drv->ifindex);
4608
4609         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
4610                 goto failed;
4611
4612         if (params->bssid) {
4613                 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
4614                                        params->bssid))
4615                         goto failed;
4616         }
4617
4618         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_AP)) {
4619                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4620                            "into AP mode", bss->ifname);
4621                 goto failed;
4622         }
4623
4624         if (params->num_bridge && params->bridge[0] &&
4625             i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
4626                 goto failed;
4627
4628         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
4629                 goto failed;
4630
4631         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4632         if (drv->eapol_sock < 0) {
4633                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4634                 goto failed;
4635         }
4636
4637         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4638         {
4639                 printf("Could not register read socket for eapol\n");
4640                 goto failed;
4641         }
4642
4643         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
4644                 goto failed;
4645
4646         return bss;
4647
4648 failed:
4649         nl80211_remove_monitor_interface(drv);
4650         if (drv->ioctl_sock >= 0)
4651                 close(drv->ioctl_sock);
4652
4653         genl_family_put(drv->nl80211);
4654         nl_cache_free(drv->nl_cache);
4655         nl_handle_destroy(drv->nl_handle);
4656         nl_cb_put(drv->nl_cb);
4657
4658         os_free(drv);
4659         return NULL;
4660 }
4661
4662
4663 static void i802_deinit(void *priv)
4664 {
4665         wpa_driver_nl80211_deinit(priv);
4666 }
4667
4668 #endif /* HOSTAPD */
4669
4670
4671 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4672         enum wpa_driver_if_type type)
4673 {
4674         switch (type) {
4675         case WPA_IF_STATION:
4676                 return NL80211_IFTYPE_STATION;
4677         case WPA_IF_AP_VLAN:
4678                 return NL80211_IFTYPE_AP_VLAN;
4679         case WPA_IF_AP_BSS:
4680                 return NL80211_IFTYPE_AP;
4681         }
4682         return -1;
4683 }
4684
4685
4686 static int wpa_driver_nl80211_if_add(const char *iface, void *priv,
4687                                      enum wpa_driver_if_type type,
4688                                      const char *ifname, const u8 *addr,
4689                                      void *bss_ctx, void **drv_priv)
4690 {
4691         struct i802_bss *bss = priv;
4692         struct wpa_driver_nl80211_data *drv = bss->drv;
4693         int ifidx;
4694 #ifdef HOSTAPD
4695         struct i802_bss *new_bss = NULL;
4696
4697         if (type == WPA_IF_AP_BSS) {
4698                 new_bss = os_zalloc(sizeof(*new_bss));
4699                 if (new_bss == NULL)
4700                         return -1;
4701         }
4702 #endif /* HOSTAPD */
4703
4704         ifidx = nl80211_create_iface(drv, ifname,
4705                                      wpa_driver_nl80211_if_type(type), addr,
4706                                      0);
4707         if (ifidx < 0) {
4708 #ifdef HOSTAPD
4709                 os_free(new_bss);
4710 #endif /* HOSTAPD */
4711                 return -1;
4712         }
4713
4714 #ifdef HOSTAPD
4715         if (type == WPA_IF_AP_BSS) {
4716                 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
4717                         nl80211_remove_iface(drv, ifidx);
4718                         os_free(bss);
4719                         return -1;
4720                 }
4721                 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
4722                 new_bss->ifindex = ifidx;
4723                 new_bss->drv = drv;
4724                 new_bss->next = drv->first_bss.next;
4725                 drv->first_bss.next = new_bss;
4726                 if (drv_priv)
4727                         *drv_priv = new_bss;
4728         }
4729 #endif /* HOSTAPD */
4730
4731         return 0;
4732 }
4733
4734
4735 static int wpa_driver_nl80211_if_remove(void *priv,
4736                                         enum wpa_driver_if_type type,
4737                                         const char *ifname)
4738 {
4739         struct i802_bss *bss = priv;
4740         struct wpa_driver_nl80211_data *drv = bss->drv;
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                 return 0;
4752
4753         if (bss != &drv->first_bss) {
4754                 struct i802_bss *tbss = &drv->first_bss;
4755
4756                 while (tbss) {
4757                         if (tbss->next != bss)
4758                                 continue;
4759
4760                         tbss->next = bss->next;
4761                         os_free(bss);
4762                         break;
4763                 }
4764         }
4765 #endif /* HOSTAPD */
4766
4767         return 0;
4768 }
4769
4770
4771 static int cookie_handler(struct nl_msg *msg, void *arg)
4772 {
4773         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4774         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4775         u64 *cookie = arg;
4776         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4777                   genlmsg_attrlen(gnlh, 0), NULL);
4778         if (tb[NL80211_ATTR_COOKIE])
4779                 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
4780         return NL_SKIP;
4781 }
4782
4783
4784 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
4785                                           const u8 *dst, const u8 *src,
4786                                           const u8 *bssid,
4787                                           const u8 *data, size_t data_len)
4788 {
4789         struct i802_bss *bss = priv;
4790         struct wpa_driver_nl80211_data *drv = bss->drv;
4791         int ret = -1;
4792         struct nl_msg *msg;
4793         u8 *buf;
4794         struct ieee80211_hdr *hdr;
4795         u64 cookie;
4796
4797         wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
4798                    drv->ifindex);
4799
4800         buf = os_zalloc(24 + data_len);
4801         if (buf == NULL)
4802                 return ret;
4803         os_memcpy(buf + 24, data, data_len);
4804         hdr = (struct ieee80211_hdr *) buf;
4805         hdr->frame_control =
4806                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
4807         os_memcpy(hdr->addr1, dst, ETH_ALEN);
4808         os_memcpy(hdr->addr2, src, ETH_ALEN);
4809         os_memcpy(hdr->addr3, bssid, ETH_ALEN);
4810
4811         if (drv->nlmode == NL80211_IFTYPE_AP) {
4812                 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
4813                 os_free(buf);
4814                 return ret;
4815         }
4816
4817         msg = nlmsg_alloc();
4818         if (!msg)
4819                 return -1;
4820
4821         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4822                     NL80211_CMD_ACTION, 0);
4823
4824         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4825         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4826         NLA_PUT(msg, NL80211_ATTR_FRAME, 24 + data_len, buf);
4827         os_free(buf);
4828
4829         cookie = 0;
4830         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
4831         msg = NULL;
4832         if (ret) {
4833                 wpa_printf(MSG_DEBUG, "nl80211: Action command failed: ret=%d "
4834                            "(%s)", ret, strerror(-ret));
4835                 goto nla_put_failure;
4836         }
4837         wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
4838                    "cookie 0x%llx", (long long unsigned int) cookie);
4839         drv->send_action_cookie = cookie;
4840         drv->pending_send_action = 1;
4841         ret = 0;
4842
4843 nla_put_failure:
4844         nlmsg_free(msg);
4845         return ret;
4846 }
4847
4848
4849 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
4850                                                 unsigned int duration)
4851 {
4852         struct i802_bss *bss = priv;
4853         struct wpa_driver_nl80211_data *drv = bss->drv;
4854         struct nl_msg *msg;
4855         int ret;
4856         u64 cookie;
4857
4858         msg = nlmsg_alloc();
4859         if (!msg)
4860                 return -1;
4861
4862         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4863                     NL80211_CMD_REMAIN_ON_CHANNEL, 0);
4864
4865         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4866         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4867         NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
4868
4869         cookie = 0;
4870         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
4871         if (ret == 0) {
4872                 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
4873                            "0x%llx for freq=%u MHz duration=%u",
4874                            (long long unsigned int) cookie, freq, duration);
4875                 drv->remain_on_chan_cookie = cookie;
4876                 return 0;
4877         }
4878         wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
4879                    "(freq=%d): %d (%s)", freq, ret, strerror(-ret));
4880 nla_put_failure:
4881         return -1;
4882 }
4883
4884
4885 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
4886 {
4887         struct i802_bss *bss = priv;
4888         struct wpa_driver_nl80211_data *drv = bss->drv;
4889         struct nl_msg *msg;
4890         int ret;
4891
4892         if (!drv->pending_remain_on_chan) {
4893                 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
4894                            "to cancel");
4895                 return -1;
4896         }
4897
4898         wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
4899                    "0x%llx",
4900                    (long long unsigned int) drv->remain_on_chan_cookie);
4901
4902         msg = nlmsg_alloc();
4903         if (!msg)
4904                 return -1;
4905
4906         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4907                     NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
4908
4909         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4910         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
4911
4912         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4913         if (ret == 0)
4914                 return 0;
4915         wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
4916                    "%d (%s)", ret, strerror(-ret));
4917 nla_put_failure:
4918         return -1;
4919 }
4920
4921
4922 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
4923                                                         void *timeout_ctx)
4924 {
4925         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4926         if (drv->monitor_ifidx < 0)
4927                 return; /* monitor interface already removed */
4928
4929         if (drv->nlmode != NL80211_IFTYPE_STATION)
4930                 return; /* not in station mode anymore */
4931
4932         if (drv->probe_req_report)
4933                 return; /* reporting enabled */
4934
4935         wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
4936                    "Probe Request reporting needed anymore");
4937         nl80211_remove_monitor_interface(drv);
4938 }
4939
4940
4941 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
4942 {
4943         struct i802_bss *bss = priv;
4944         struct wpa_driver_nl80211_data *drv = bss->drv;
4945
4946         if (drv->nlmode != NL80211_IFTYPE_STATION) {
4947                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
4948                            "allowed in station mode (iftype=%d)",
4949                            drv->nlmode);
4950                 return -1;
4951         }
4952         drv->probe_req_report = report;
4953
4954         if (report) {
4955                 eloop_cancel_timeout(
4956                         wpa_driver_nl80211_probe_req_report_timeout,
4957                         drv, NULL);
4958                 if (drv->monitor_ifidx < 0 &&
4959                     nl80211_create_monitor_interface(drv))
4960                         return -1;
4961         } else {
4962                 /*
4963                  * It takes a while to remove the monitor interface, so try to
4964                  * avoid doing this if it is needed again shortly. Instead,
4965                  * schedule the interface to be removed later if no need for it
4966                  * is seen.
4967                  */
4968                 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
4969                            "to be removed after 10 seconds of no use");
4970                 eloop_register_timeout(
4971                         10, 0, wpa_driver_nl80211_probe_req_report_timeout,
4972                         drv, NULL);
4973         }
4974
4975         return 0;
4976 }
4977
4978
4979 static int wpa_driver_nl80211_alloc_interface_addr(void *priv, u8 *addr,
4980                                                    char *ifname)
4981 {
4982         struct i802_bss *bss = priv;
4983         struct wpa_driver_nl80211_data *drv = bss->drv;
4984
4985         if (ifname)
4986                 ifname[0] = '\0';
4987
4988         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, addr) < 0)
4989                 return -1;
4990
4991         if (addr[0] & 0x02) {
4992                 /* TODO: add support for generating multiple addresses */
4993                 addr[0] ^= 0x80;
4994         } else
4995                 addr[0] = 0x02; /* locally administered */
4996
4997         return 0;
4998 }
4999
5000
5001 static void wpa_driver_nl80211_release_interface_addr(void *priv,
5002                                                       const u8 *addr)
5003 {
5004         /* TODO: keep list of allocated address and release them here */
5005 }
5006
5007
5008 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
5009                                      int ifindex, int disabled)
5010 {
5011         struct nl_msg *msg;
5012         struct nlattr *bands, *band;
5013         int ret;
5014
5015         msg = nlmsg_alloc();
5016         if (!msg)
5017                 return -1;
5018
5019         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5020                     NL80211_CMD_SET_TX_BITRATE_MASK, 0);
5021         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5022
5023         bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
5024         if (!bands)
5025                 goto nla_put_failure;
5026
5027         /*
5028          * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
5029          * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
5030          * rates. All 5 GHz rates are left enabled.
5031          */
5032         band = nla_nest_start(msg, NL80211_BAND_2GHZ);
5033         if (!band)
5034                 goto nla_put_failure;
5035         NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
5036                 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
5037         nla_nest_end(msg, band);
5038
5039         nla_nest_end(msg, bands);
5040
5041         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5042         msg = NULL;
5043         if (ret) {
5044                 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
5045                            "(%s)", ret, strerror(-ret));
5046         }
5047
5048         return ret;
5049
5050 nla_put_failure:
5051         nlmsg_free(msg);
5052         return -1;
5053 }
5054
5055
5056 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
5057 {
5058         struct i802_bss *bss = priv;
5059         struct wpa_driver_nl80211_data *drv = bss->drv;
5060         drv->disable_11b_rates = disabled;
5061         return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
5062 }
5063
5064
5065 static int wpa_driver_nl80211_deinit_ap(void *priv)
5066 {
5067         struct i802_bss *bss = priv;
5068         struct wpa_driver_nl80211_data *drv = bss->drv;
5069         if (drv->nlmode != NL80211_IFTYPE_AP)
5070                 return -1;
5071         wpa_driver_nl80211_del_beacon(drv);
5072         return wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
5073 }
5074
5075
5076 static void wpa_driver_nl80211_resume(void *priv)
5077 {
5078         struct i802_bss *bss = priv;
5079         struct wpa_driver_nl80211_data *drv = bss->drv;
5080         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
5081                 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
5082                            "resume event");
5083         }
5084 }
5085
5086
5087 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5088         .name = "nl80211",
5089         .desc = "Linux nl80211/cfg80211",
5090         .get_bssid = wpa_driver_nl80211_get_bssid,
5091         .get_ssid = wpa_driver_nl80211_get_ssid,
5092         .set_key = wpa_driver_nl80211_set_key,
5093         .scan2 = wpa_driver_nl80211_scan,
5094         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5095         .deauthenticate = wpa_driver_nl80211_deauthenticate,
5096         .disassociate = wpa_driver_nl80211_disassociate,
5097         .authenticate = wpa_driver_nl80211_authenticate,
5098         .associate = wpa_driver_nl80211_associate,
5099         .init = wpa_driver_nl80211_init,
5100         .deinit = wpa_driver_nl80211_deinit,
5101         .get_capa = wpa_driver_nl80211_get_capa,
5102         .set_operstate = wpa_driver_nl80211_set_operstate,
5103         .set_supp_port = wpa_driver_nl80211_set_supp_port,
5104         .set_country = wpa_driver_nl80211_set_country,
5105         .set_beacon = wpa_driver_nl80211_set_beacon,
5106         .if_add = wpa_driver_nl80211_if_add,
5107         .if_remove = wpa_driver_nl80211_if_remove,
5108         .send_mlme = wpa_driver_nl80211_send_mlme,
5109         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5110         .sta_add = wpa_driver_nl80211_sta_add,
5111         .sta_remove = wpa_driver_nl80211_sta_remove,
5112         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
5113         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
5114 #ifdef HOSTAPD
5115         .hapd_init = i802_init,
5116         .hapd_deinit = i802_deinit,
5117         .get_seqnum = i802_get_seqnum,
5118         .flush = i802_flush,
5119         .read_sta_data = i802_read_sta_data,
5120         .sta_deauth = i802_sta_deauth,
5121         .sta_disassoc = i802_sta_disassoc,
5122         .get_inact_sec = i802_get_inact_sec,
5123         .sta_clear_stats = i802_sta_clear_stats,
5124         .set_freq = i802_set_freq,
5125         .set_rts = i802_set_rts,
5126         .set_frag = i802_set_frag,
5127         .set_rate_sets = i802_set_rate_sets,
5128         .set_cts_protect = i802_set_cts_protect,
5129         .set_preamble = i802_set_preamble,
5130         .set_short_slot_time = i802_set_short_slot_time,
5131         .set_tx_queue_params = i802_set_tx_queue_params,
5132         .set_sta_vlan = i802_set_sta_vlan,
5133         .set_wds_sta = i802_set_wds_sta,
5134 #endif /* HOSTAPD */
5135         .send_action = wpa_driver_nl80211_send_action,
5136         .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
5137         .cancel_remain_on_channel =
5138         wpa_driver_nl80211_cancel_remain_on_channel,
5139         .probe_req_report = wpa_driver_nl80211_probe_req_report,
5140         .alloc_interface_addr = wpa_driver_nl80211_alloc_interface_addr,
5141         .release_interface_addr = wpa_driver_nl80211_release_interface_addr,
5142         .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
5143         .deinit_ap = wpa_driver_nl80211_deinit_ap,
5144         .resume = wpa_driver_nl80211_resume,
5145 };