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