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