src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009-2010, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if.h>
  22 #include <netlink/genl/genl.h>
  23 #include <netlink/genl/family.h>
  24 #include <netlink/genl/ctrl.h>
  25 #include <linux/rtnetlink.h>
  26 #include <netpacket/packet.h>
  27 #include <linux/filter.h>
  28 #include "nl80211_copy.h"
  29
  30 #include "common.h"
  31 #include "eloop.h"
  32 #include "common/ieee802_11_defs.h"
  33 #include "netlink.h"
  34 #include "linux_ioctl.h"
  35 #include "radiotap.h"
  36 #include "radiotap_iter.h"
  37 #include "rfkill.h"
  38 #include "driver.h"
  39
  40 #ifdef CONFIG_LIBNL20
  41 /* libnl 2.0 compatibility code */
  42 #define nl_handle nl_sock
  43 #define nl80211_handle_alloc nl_socket_alloc_cb
  44 #define nl80211_handle_destroy nl_socket_free
  45 #else
  46 /*
  47  * libnl 1.1 has a bug, it tries to allocate socket numbers densely
  48  * but when you free a socket again it will mess up its bitmap and
  49  * and use the wrong number the next time it needs a socket ID.
  50  * Therefore, we wrap the handle alloc/destroy and add our own pid
  51  * accounting.
  52  */
  53 static uint32_t port_bitmap[32] = { 0 };
  54
  55 static struct nl_handle *nl80211_handle_alloc(void *cb)
  56 {
  57         struct nl_handle *handle;
  58         uint32_t pid = getpid() & 0x3FFFFF;
  59         int i;
  60
  61         handle = nl_handle_alloc_cb(cb);
  62
  63         for (i = 0; i < 1024; i++) {
  64                 if (port_bitmap[i / 32] & (1 << (i % 32)))
  65                         continue;
  66                 port_bitmap[i / 32] |= 1 << (i % 32);
  67                 pid += i << 22;
  68                 break;
  69         }
  70
  71         nl_socket_set_local_port(handle, pid);
  72
  73         return handle;
  74 }
  75
  76 static void nl80211_handle_destroy(struct nl_handle *handle)
  77 {
  78         uint32_t port = nl_socket_get_local_port(handle);
  79
  80         port >>= 22;
  81         port_bitmap[port / 32] &= ~(1 << (port % 32));
  82
  83         nl_handle_destroy(handle);
  84 }
  85 #endif /* CONFIG_LIBNL20 */
  86
  87
  88 #ifndef IFF_LOWER_UP
  89 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  90 #endif
  91 #ifndef IFF_DORMANT
  92 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  93 #endif
  94
  95 #ifndef IF_OPER_DORMANT
  96 #define IF_OPER_DORMANT 5
  97 #endif
  98 #ifndef IF_OPER_UP
  99 #define IF_OPER_UP 6
 100 #endif
 101
 102 struct i802_bss {
 103         struct wpa_driver_nl80211_data *drv;
 104         struct i802_bss *next;
 105         int ifindex;
 106         char ifname[IFNAMSIZ + 1];
 107         unsigned int beacon_set:1;
 108 };
 109
 110 struct wpa_driver_nl80211_data {
 111         void *ctx;
 112         struct netlink_data *netlink;
 113         int ioctl_sock; /* socket for ioctl() use */
 114         char brname[IFNAMSIZ];
 115         int ifindex;
 116         int if_removed;
 117         int if_disabled;
 118         struct rfkill_data *rfkill;
 119         struct wpa_driver_capa capa;
 120         int has_capability;
 121
 122         int operstate;
 123
 124         int scan_complete_events;
 125
 126         struct nl_handle *nl_handle;
 127         struct nl_handle *nl_handle_event;
 128         struct nl_cache *nl_cache;
 129         struct nl_cache *nl_cache_event;
 130         struct nl_cb *nl_cb;
 131         struct genl_family *nl80211;
 132
 133         u8 auth_bssid[ETH_ALEN];
 134         u8 bssid[ETH_ALEN];
 135         int associated;
 136         u8 ssid[32];
 137         size_t ssid_len;
 138         int nlmode;
 139         int ap_scan_as_station;
 140         unsigned int assoc_freq;
 141
 142         int monitor_sock;
 143         int monitor_ifidx;
 144         int probe_req_report;
 145         int disable_11b_rates;
 146
 147         unsigned int pending_remain_on_chan:1;
 148         unsigned int added_bridge:1;
 149         unsigned int added_if_into_bridge:1;
 150
 151         u64 remain_on_chan_cookie;
 152         u64 send_action_cookie;
 153
 154         struct wpa_driver_scan_filter *filter_ssids;
 155         size_t num_filter_ssids;
 156
 157         struct i802_bss first_bss;
 158
 159 #ifdef HOSTAPD
 160         int eapol_sock; /* socket for EAPOL frames */
 161
 162         int default_if_indices[16];
 163         int *if_indices;
 164         int num_if_indices;
 165
 166         int last_freq;
 167         int last_freq_ht;
 168 #endif /* HOSTAPD */
 169 };
 170
 171
 172 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 173                                             void *timeout_ctx);
 174 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 175 static int
 176 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 177 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 178                                    const u8 *addr, int cmd, u16 reason_code,
 179                                    int local_state_change);
 180 static void nl80211_remove_monitor_interface(
 181         struct wpa_driver_nl80211_data *drv);
 182
 183 #ifdef HOSTAPD
 184 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 185 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 186 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 187 static int wpa_driver_nl80211_if_remove(void *priv,
 188                                         enum wpa_driver_if_type type,
 189                                         const char *ifname);
 190 #else /* HOSTAPD */
 191 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
 192 {
 193         return 0;
 194 }
 195 #endif /* HOSTAPD */
 196
 197 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 198 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
 199                                                         void *timeout_ctx);
 200 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
 201                                      int ifindex, int disabled);
 202
 203
 204 /* nl80211 code */
 205 static int ack_handler(struct nl_msg *msg, void *arg)
 206 {
 207         int *err = arg;
 208         *err = 0;
 209         return NL_STOP;
 210 }
 211
 212 static int finish_handler(struct nl_msg *msg, void *arg)
 213 {
 214         int *ret = arg;
 215         *ret = 0;
 216         return NL_SKIP;
 217 }
 218
 219 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 220                          void *arg)
 221 {
 222         int *ret = arg;
 223         *ret = err->error;
 224         return NL_SKIP;
 225 }
 226
 227
 228 static int no_seq_check(struct nl_msg *msg, void *arg)
 229 {
 230         return NL_OK;
 231 }
 232
 233
 234 static int send_and_recv(struct wpa_driver_nl80211_data *drv,
 235                          struct nl_handle *nl_handle, struct nl_msg *msg,
 236                          int (*valid_handler)(struct nl_msg *, void *),
 237                          void *valid_data)
 238 {
 239         struct nl_cb *cb;
 240         int err = -ENOMEM;
 241
 242         cb = nl_cb_clone(drv->nl_cb);
 243         if (!cb)
 244                 goto out;
 245
 246         err = nl_send_auto_complete(nl_handle, msg);
 247         if (err < 0)
 248                 goto out;
 249
 250         err = 1;
 251
 252         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 253         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 254         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 255
 256         if (valid_handler)
 257                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 258                           valid_handler, valid_data);
 259
 260         while (err > 0)
 261                 nl_recvmsgs(nl_handle, cb);
 262  out:
 263         nl_cb_put(cb);
 264         nlmsg_free(msg);
 265         return err;
 266 }
 267
 268
 269 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 270                               struct nl_msg *msg,
 271                               int (*valid_handler)(struct nl_msg *, void *),
 272                               void *valid_data)
 273 {
 274         return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
 275                              valid_data);
 276 }
 277
 278
 279 struct family_data {
 280         const char *group;
 281         int id;
 282 };
 283
 284
 285 static int family_handler(struct nl_msg *msg, void *arg)
 286 {
 287         struct family_data *res = arg;
 288         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 289         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 290         struct nlattr *mcgrp;
 291         int i;
 292
 293         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 294                   genlmsg_attrlen(gnlh, 0), NULL);
 295         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 296                 return NL_SKIP;
 297
 298         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 299                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 300                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 301                           nla_len(mcgrp), NULL);
 302                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 303                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 304                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 305                                res->group,
 306                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 307                         continue;
 308                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 309                 break;
 310         };
 311
 312         return NL_SKIP;
 313 }
 314
 315
 316 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 317                                const char *family, const char *group)
 318 {
 319         struct nl_msg *msg;
 320         int ret = -1;
 321         struct family_data res = { group, -ENOENT };
 322
 323         msg = nlmsg_alloc();
 324         if (!msg)
 325                 return -ENOMEM;
 326         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 327                     0, 0, CTRL_CMD_GETFAMILY, 0);
 328         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 329
 330         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 331         msg = NULL;
 332         if (ret == 0)
 333                 ret = res.id;
 334
 335 nla_put_failure:
 336         nlmsg_free(msg);
 337         return ret;
 338 }
 339
 340
 341 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 342 {
 343         struct i802_bss *bss = priv;
 344         struct wpa_driver_nl80211_data *drv = bss->drv;
 345         if (!drv->associated)
 346                 return -1;
 347         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 348         return 0;
 349 }
 350
 351
 352 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 353 {
 354         struct i802_bss *bss = priv;
 355         struct wpa_driver_nl80211_data *drv = bss->drv;
 356         if (!drv->associated)
 357                 return -1;
 358         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 359         return drv->ssid_len;
 360 }
 361
 362
 363 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 364                                           char *buf, size_t len, int del)
 365 {
 366         union wpa_event_data event;
 367
 368         os_memset(&event, 0, sizeof(event));
 369         if (len > sizeof(event.interface_status.ifname))
 370                 len = sizeof(event.interface_status.ifname) - 1;
 371         os_memcpy(event.interface_status.ifname, buf, len);
 372         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 373                 EVENT_INTERFACE_ADDED;
 374
 375         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 376                    del ? "DEL" : "NEW",
 377                    event.interface_status.ifname,
 378                    del ? "removed" : "added");
 379
 380         if (os_strcmp(drv->first_bss.ifname, event.interface_status.ifname) == 0) {
 381                 if (del)
 382                         drv->if_removed = 1;
 383                 else
 384                         drv->if_removed = 0;
 385         }
 386
 387         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 388 }
 389
 390
 391 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 392                                          u8 *buf, size_t len)
 393 {
 394         int attrlen, rta_len;
 395         struct rtattr *attr;
 396
 397         attrlen = len;
 398         attr = (struct rtattr *) buf;
 399
 400         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 401         while (RTA_OK(attr, attrlen)) {
 402                 if (attr->rta_type == IFLA_IFNAME) {
 403                         if (os_strcmp(((char *) attr) + rta_len, drv->first_bss.ifname)
 404                             == 0)
 405                                 return 1;
 406                         else
 407                                 break;
 408                 }
 409                 attr = RTA_NEXT(attr, attrlen);
 410         }
 411
 412         return 0;
 413 }
 414
 415
 416 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 417                                           int ifindex, u8 *buf, size_t len)
 418 {
 419         if (drv->ifindex == ifindex)
 420                 return 1;
 421
 422         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 423                 drv->first_bss.ifindex = if_nametoindex(drv->first_bss.ifname);
 424                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 425                            "interface");
 426                 wpa_driver_nl80211_finish_drv_init(drv);
 427                 return 1;
 428         }
 429
 430         return 0;
 431 }
 432
 433
 434 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
 435                                                  struct ifinfomsg *ifi,
 436                                                  u8 *buf, size_t len)
 437 {
 438         struct wpa_driver_nl80211_data *drv = ctx;
 439         int attrlen, rta_len;
 440         struct rtattr *attr;
 441         u32 brid = 0;
 442
 443         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len) &&
 444             !have_ifidx(drv, ifi->ifi_index)) {
 445                 wpa_printf(MSG_DEBUG, "nl80211: Ignore event for foreign "
 446                            "ifindex %d", ifi->ifi_index);
 447                 return;
 448         }
 449
 450         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 451                    "(%s%s%s%s)",
 452                    drv->operstate, ifi->ifi_flags,
 453                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 454                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 455                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 456                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 457
 458         if (!drv->if_disabled && !(ifi->ifi_flags & IFF_UP)) {
 459                 wpa_printf(MSG_DEBUG, "nl80211: Interface down");
 460                 drv->if_disabled = 1;
 461                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_DISABLED, NULL);
 462         }
 463
 464         if (drv->if_disabled && (ifi->ifi_flags & IFF_UP)) {
 465                 wpa_printf(MSG_DEBUG, "nl80211: Interface up");
 466                 drv->if_disabled = 0;
 467                 wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_ENABLED, NULL);
 468         }
 469
 470         /*
 471          * Some drivers send the association event before the operup event--in
 472          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 473          * fails. This will hit us when wpa_supplicant does not need to do
 474          * IEEE 802.1X authentication
 475          */
 476         if (drv->operstate == 1 &&
 477             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 478             !(ifi->ifi_flags & IFF_RUNNING))
 479                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 480                                        -1, IF_OPER_UP);
 481
 482         attrlen = len;
 483         attr = (struct rtattr *) buf;
 484         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 485         while (RTA_OK(attr, attrlen)) {
 486                 if (attr->rta_type == IFLA_IFNAME) {
 487                         wpa_driver_nl80211_event_link(
 488                                 drv,
 489                                 ((char *) attr) + rta_len,
 490                                 attr->rta_len - rta_len, 0);
 491                 } else if (attr->rta_type == IFLA_MASTER)
 492                         brid = nla_get_u32((struct nlattr *) attr);
 493                 attr = RTA_NEXT(attr, attrlen);
 494         }
 495
 496 #ifdef HOSTAPD
 497         if (ifi->ifi_family == AF_BRIDGE && brid) {
 498                 /* device has been added to bridge */
 499                 char namebuf[IFNAMSIZ];
 500                 if_indextoname(brid, namebuf);
 501                 wpa_printf(MSG_DEBUG, "nl80211: Add ifindex %u for bridge %s",
 502                            brid, namebuf);
 503                 add_ifidx(drv, brid);
 504         }
 505 #endif /* HOSTAPD */
 506 }
 507
 508
 509 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
 510                                                  struct ifinfomsg *ifi,
 511                                                  u8 *buf, size_t len)
 512 {
 513         struct wpa_driver_nl80211_data *drv = ctx;
 514         int attrlen, rta_len;
 515         struct rtattr *attr;
 516         u32 brid = 0;
 517
 518         attrlen = len;
 519         attr = (struct rtattr *) buf;
 520
 521         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 522         while (RTA_OK(attr, attrlen)) {
 523                 if (attr->rta_type == IFLA_IFNAME) {
 524                         wpa_driver_nl80211_event_link(
 525                                 drv,
 526                                 ((char *) attr) + rta_len,
 527                                 attr->rta_len - rta_len, 1);
 528                 } else if (attr->rta_type == IFLA_MASTER)
 529                         brid = nla_get_u32((struct nlattr *) attr);
 530                 attr = RTA_NEXT(attr, attrlen);
 531         }
 532
 533 #ifdef HOSTAPD
 534         if (ifi->ifi_family == AF_BRIDGE && brid) {
 535                 /* device has been removed from bridge */
 536                 char namebuf[IFNAMSIZ];
 537                 if_indextoname(brid, namebuf);
 538                 wpa_printf(MSG_DEBUG, "nl80211: Remove ifindex %u for bridge "
 539                            "%s", brid, namebuf);
 540                 del_ifidx(drv, brid);
 541         }
 542 #endif /* HOSTAPD */
 543 }
 544
 545
 546 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 547                             const u8 *frame, size_t len)
 548 {
 549         const struct ieee80211_mgmt *mgmt;
 550         union wpa_event_data event;
 551
 552         mgmt = (const struct ieee80211_mgmt *) frame;
 553         if (len < 24 + sizeof(mgmt->u.auth)) {
 554                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 555                            "frame");
 556                 return;
 557         }
 558
 559         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 560         os_memset(&event, 0, sizeof(event));
 561         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 562         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 563         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 564         if (len > 24 + sizeof(mgmt->u.auth)) {
 565                 event.auth.ies = mgmt->u.auth.variable;
 566                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 567         }
 568
 569         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 570 }
 571
 572
 573 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 574                             const u8 *frame, size_t len)
 575 {
 576         const struct ieee80211_mgmt *mgmt;
 577         union wpa_event_data event;
 578         u16 status;
 579
 580         mgmt = (const struct ieee80211_mgmt *) frame;
 581         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 582                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 583                            "frame");
 584                 return;
 585         }
 586
 587         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 588         if (status != WLAN_STATUS_SUCCESS) {
 589                 os_memset(&event, 0, sizeof(event));
 590                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 591                         event.assoc_reject.resp_ies =
 592                                 (u8 *) mgmt->u.assoc_resp.variable;
 593                         event.assoc_reject.resp_ies_len =
 594                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 595                 }
 596                 event.assoc_reject.status_code = status;
 597
 598                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 599                 return;
 600         }
 601
 602         drv->associated = 1;
 603         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 604
 605         os_memset(&event, 0, sizeof(event));
 606         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 607                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 608                 event.assoc_info.resp_ies_len =
 609                         len - 24 - sizeof(mgmt->u.assoc_resp);
 610         }
 611
 612         event.assoc_info.freq = drv->assoc_freq;
 613
 614         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 615 }
 616
 617
 618 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 619                                enum nl80211_commands cmd, struct nlattr *status,
 620                                struct nlattr *addr, struct nlattr *req_ie,
 621                                struct nlattr *resp_ie)
 622 {
 623         union wpa_event_data event;
 624
 625         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 626                 /*
 627                  * Avoid reporting two association events that would confuse
 628                  * the core code.
 629                  */
 630                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 631                            "when using userspace SME", cmd);
 632                 return;
 633         }
 634
 635         os_memset(&event, 0, sizeof(event));
 636         if (cmd == NL80211_CMD_CONNECT &&
 637             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 638                 if (resp_ie) {
 639                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 640                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 641                 }
 642                 event.assoc_reject.status_code = nla_get_u16(status);
 643                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 644                 return;
 645         }
 646
 647         drv->associated = 1;
 648         if (addr)
 649                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 650
 651         if (req_ie) {
 652                 event.assoc_info.req_ies = nla_data(req_ie);
 653                 event.assoc_info.req_ies_len = nla_len(req_ie);
 654         }
 655         if (resp_ie) {
 656                 event.assoc_info.resp_ies = nla_data(resp_ie);
 657                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 658         }
 659
 660         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 661 }
 662
 663
 664 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 665                                enum nl80211_commands cmd, struct nlattr *addr)
 666 {
 667         union wpa_event_data event;
 668         enum wpa_event_type ev;
 669
 670         if (nla_len(addr) != ETH_ALEN)
 671                 return;
 672
 673         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 674                    cmd, MAC2STR((u8 *) nla_data(addr)));
 675
 676         if (cmd == NL80211_CMD_AUTHENTICATE)
 677                 ev = EVENT_AUTH_TIMED_OUT;
 678         else if (cmd == NL80211_CMD_ASSOCIATE)
 679                 ev = EVENT_ASSOC_TIMED_OUT;
 680         else
 681                 return;
 682
 683         os_memset(&event, 0, sizeof(event));
 684         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 685         wpa_supplicant_event(drv->ctx, ev, &event);
 686 }
 687
 688
 689 static void mlme_event_action(struct wpa_driver_nl80211_data *drv,
 690                               struct nlattr *freq, const u8 *frame, size_t len)
 691 {
 692         const struct ieee80211_mgmt *mgmt;
 693         union wpa_event_data event;
 694         u16 fc, stype;
 695
 696         mgmt = (const struct ieee80211_mgmt *) frame;
 697         if (len < 24) {
 698                 wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
 699                 return;
 700         }
 701
 702         fc = le_to_host16(mgmt->frame_control);
 703         stype = WLAN_FC_GET_STYPE(fc);
 704
 705         os_memset(&event, 0, sizeof(event));
 706         event.rx_action.da = mgmt->da;
 707         event.rx_action.sa = mgmt->sa;
 708         event.rx_action.bssid = mgmt->bssid;
 709         event.rx_action.category = mgmt->u.action.category;
 710         event.rx_action.data = &mgmt->u.action.category + 1;
 711         event.rx_action.len = frame + len - event.rx_action.data;
 712         if (freq)
 713                 event.rx_action.freq = nla_get_u32(freq);
 714         wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
 715 }
 716
 717
 718 static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
 719                                         struct nlattr *cookie, const u8 *frame,
 720                                         size_t len, struct nlattr *ack)
 721 {
 722         union wpa_event_data event;
 723         const struct ieee80211_hdr *hdr;
 724         u16 fc;
 725         u64 cookie_val;
 726
 727         if (!cookie)
 728                 return;
 729
 730         cookie_val = nla_get_u64(cookie);
 731         wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s "
 732                    "(ack=%d)",
 733                    (long long unsigned int) cookie_val,
 734                    cookie_val == drv->send_action_cookie ?
 735                    " (match)" : " (unknown)", ack != NULL);
 736         if (cookie_val != drv->send_action_cookie)
 737                 return;
 738
 739         hdr = (const struct ieee80211_hdr *) frame;
 740         fc = le_to_host16(hdr->frame_control);
 741
 742         os_memset(&event, 0, sizeof(event));
 743         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
 744         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
 745         event.tx_status.dst = hdr->addr1;
 746         event.tx_status.data = frame;
 747         event.tx_status.data_len = len;
 748         event.tx_status.ack = ack != NULL;
 749         wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
 750 }
 751
 752
 753 static void mlme_event_deauth_disassoc(struct wpa_driver_nl80211_data *drv,
 754                                        enum wpa_event_type type,
 755                                        const u8 *frame, size_t len)
 756 {
 757         const struct ieee80211_mgmt *mgmt;
 758         union wpa_event_data event;
 759         const u8 *bssid = NULL;
 760         u16 reason_code = 0;
 761
 762         mgmt = (const struct ieee80211_mgmt *) frame;
 763         if (len >= 24) {
 764                 bssid = mgmt->bssid;
 765
 766                 if (drv->associated != 0 &&
 767                     os_memcmp(bssid, drv->bssid, ETH_ALEN) != 0 &&
 768                     os_memcmp(bssid, drv->auth_bssid, ETH_ALEN) != 0) {
 769                         /*
 770                          * We have presumably received this deauth as a
 771                          * response to a clear_state_mismatch() outgoing
 772                          * deauth.  Don't let it take us offline!
 773                          */
 774                         wpa_printf(MSG_DEBUG, "nl80211: Deauth received "
 775                                    "from Unknown BSSID " MACSTR " -- ignoring",
 776                                    MAC2STR(bssid));
 777                         return;
 778                 }
 779         }
 780
 781         drv->associated = 0;
 782         os_memset(&event, 0, sizeof(event));
 783
 784         /* Note: Same offset for Reason Code in both frame subtypes */
 785         if (len >= 24 + sizeof(mgmt->u.deauth))
 786                 reason_code = le_to_host16(mgmt->u.deauth.reason_code);
 787
 788         if (type == EVENT_DISASSOC) {
 789                 event.disassoc_info.addr = bssid;
 790                 event.disassoc_info.reason_code = reason_code;
 791                 if (frame + len > mgmt->u.disassoc.variable) {
 792                         event.disassoc_info.ie = mgmt->u.disassoc.variable;
 793                         event.disassoc_info.ie_len = frame + len -
 794                                 mgmt->u.disassoc.variable;
 795                 }
 796         } else {
 797                 event.deauth_info.addr = bssid;
 798                 event.deauth_info.reason_code = reason_code;
 799                 if (frame + len > mgmt->u.deauth.variable) {
 800                         event.deauth_info.ie = mgmt->u.deauth.variable;
 801                         event.deauth_info.ie_len = frame + len -
 802                                 mgmt->u.deauth.variable;
 803                 }
 804         }
 805
 806         wpa_supplicant_event(drv->ctx, type, &event);
 807 }
 808
 809
 810 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 811                        enum nl80211_commands cmd, struct nlattr *frame,
 812                        struct nlattr *addr, struct nlattr *timed_out,
 813                        struct nlattr *freq, struct nlattr *ack,
 814                        struct nlattr *cookie)
 815 {
 816         if (timed_out && addr) {
 817                 mlme_timeout_event(drv, cmd, addr);
 818                 return;
 819         }
 820
 821         if (frame == NULL) {
 822                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 823                            "data", cmd);
 824                 return;
 825         }
 826
 827         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 828         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 829                     nla_data(frame), nla_len(frame));
 830
 831         switch (cmd) {
 832         case NL80211_CMD_AUTHENTICATE:
 833                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 834                 break;
 835         case NL80211_CMD_ASSOCIATE:
 836                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 837                 break;
 838         case NL80211_CMD_DEAUTHENTICATE:
 839                 mlme_event_deauth_disassoc(drv, EVENT_DEAUTH,
 840                                            nla_data(frame), nla_len(frame));
 841                 break;
 842         case NL80211_CMD_DISASSOCIATE:
 843                 mlme_event_deauth_disassoc(drv, EVENT_DISASSOC,
 844                                            nla_data(frame), nla_len(frame));
 845                 break;
 846         case NL80211_CMD_ACTION:
 847                 mlme_event_action(drv, freq, nla_data(frame), nla_len(frame));
 848                 break;
 849         case NL80211_CMD_ACTION_TX_STATUS:
 850                 mlme_event_action_tx_status(drv, cookie, nla_data(frame),
 851                                             nla_len(frame), ack);
 852                 break;
 853         default:
 854                 break;
 855         }
 856 }
 857
 858
 859 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 860                                            struct nlattr *tb[])
 861 {
 862         union wpa_event_data data;
 863
 864         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 865         os_memset(&data, 0, sizeof(data));
 866         if (tb[NL80211_ATTR_MAC]) {
 867                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 868                             nla_data(tb[NL80211_ATTR_MAC]),
 869                             nla_len(tb[NL80211_ATTR_MAC]));
 870                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 871         }
 872         if (tb[NL80211_ATTR_KEY_SEQ]) {
 873                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 874                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 875                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 876         }
 877         if (tb[NL80211_ATTR_KEY_TYPE]) {
 878                 enum nl80211_key_type key_type =
 879                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 880                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 881                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 882                         data.michael_mic_failure.unicast = 1;
 883         } else
 884                 data.michael_mic_failure.unicast = 1;
 885
 886         if (tb[NL80211_ATTR_KEY_IDX]) {
 887                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 888                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 889         }
 890
 891         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 892 }
 893
 894
 895 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 896                                  struct nlattr *tb[])
 897 {
 898         if (tb[NL80211_ATTR_MAC] == NULL) {
 899                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 900                            "event");
 901                 return;
 902         }
 903         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 904         drv->associated = 1;
 905         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 906                    MAC2STR(drv->bssid));
 907
 908         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 909 }
 910
 911
 912 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
 913                                          int cancel_event, struct nlattr *tb[])
 914 {
 915         unsigned int freq, chan_type, duration;
 916         union wpa_event_data data;
 917         u64 cookie;
 918
 919         if (tb[NL80211_ATTR_WIPHY_FREQ])
 920                 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
 921         else
 922                 freq = 0;
 923
 924         if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
 925                 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 926         else
 927                 chan_type = 0;
 928
 929         if (tb[NL80211_ATTR_DURATION])
 930                 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
 931         else
 932                 duration = 0;
 933
 934         if (tb[NL80211_ATTR_COOKIE])
 935                 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
 936         else
 937                 cookie = 0;
 938
 939         wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
 940                    "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
 941                    cancel_event, freq, chan_type, duration,
 942                    (long long unsigned int) cookie,
 943                    cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
 944
 945         if (cookie != drv->remain_on_chan_cookie)
 946                 return; /* not for us */
 947
 948         drv->pending_remain_on_chan = !cancel_event;
 949
 950         os_memset(&data, 0, sizeof(data));
 951         data.remain_on_channel.freq = freq;
 952         data.remain_on_channel.duration = duration;
 953         wpa_supplicant_event(drv->ctx, cancel_event ?
 954                              EVENT_CANCEL_REMAIN_ON_CHANNEL :
 955                              EVENT_REMAIN_ON_CHANNEL, &data);
 956 }
 957
 958
 959 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
 960                             struct nlattr *tb[])
 961 {
 962         union wpa_event_data event;
 963         struct nlattr *nl;
 964         int rem;
 965         struct scan_info *info;
 966 #define MAX_REPORT_FREQS 50
 967         int freqs[MAX_REPORT_FREQS];
 968         int num_freqs = 0;
 969
 970         os_memset(&event, 0, sizeof(event));
 971         info = &event.scan_info;
 972         info->aborted = aborted;
 973
 974         if (tb[NL80211_ATTR_SCAN_SSIDS]) {
 975                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
 976                         struct wpa_driver_scan_ssid *s =
 977                                 &info->ssids[info->num_ssids];
 978                         s->ssid = nla_data(nl);
 979                         s->ssid_len = nla_len(nl);
 980                         info->num_ssids++;
 981                         if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
 982                                 break;
 983                 }
 984         }
 985         if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
 986                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
 987                 {
 988                         freqs[num_freqs] = nla_get_u32(nl);
 989                         num_freqs++;
 990                         if (num_freqs == MAX_REPORT_FREQS - 1)
 991                                 break;
 992                 }
 993                 info->freqs = freqs;
 994                 info->num_freqs = num_freqs;
 995         }
 996         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
 997 }
 998
 999
1000 static int get_link_signal(struct nl_msg *msg, void *arg)
1001 {
1002         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1003         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1004         struct nlattr *sinfo[NL80211_STA_INFO_MAX + 1];
1005         static struct nla_policy policy[NL80211_STA_INFO_MAX + 1] = {
1006                 [NL80211_STA_INFO_SIGNAL] = { .type = NLA_U8 },
1007         };
1008         int *sig = arg;
1009
1010         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1011                   genlmsg_attrlen(gnlh, 0), NULL);
1012         if (!tb[NL80211_ATTR_STA_INFO] ||
1013             nla_parse_nested(sinfo, NL80211_STA_INFO_MAX,
1014                              tb[NL80211_ATTR_STA_INFO], policy))
1015                 return NL_SKIP;
1016         if (!sinfo[NL80211_STA_INFO_SIGNAL])
1017                 return NL_SKIP;
1018
1019         *sig = (s8) nla_get_u8(sinfo[NL80211_STA_INFO_SIGNAL]);
1020         return NL_SKIP;
1021 }
1022
1023
1024 static int nl80211_get_link_signal(struct wpa_driver_nl80211_data *drv,
1025                                    int *sig)
1026 {
1027         struct nl_msg *msg;
1028
1029         *sig = -9999;
1030
1031         msg = nlmsg_alloc();
1032         if (!msg)
1033                 return -ENOMEM;
1034
1035         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1036                     0, NL80211_CMD_GET_STATION, 0);
1037
1038         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1039         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
1040
1041         return send_and_recv_msgs(drv, msg, get_link_signal, sig);
1042  nla_put_failure:
1043         return -ENOBUFS;
1044 }
1045
1046
1047 static void nl80211_cqm_event(struct wpa_driver_nl80211_data *drv,
1048                               struct nlattr *tb[])
1049 {
1050         static struct nla_policy cqm_policy[NL80211_ATTR_CQM_MAX + 1] = {
1051                 [NL80211_ATTR_CQM_RSSI_THOLD] = { .type = NLA_U32 },
1052                 [NL80211_ATTR_CQM_RSSI_HYST] = { .type = NLA_U8 },
1053                 [NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] = { .type = NLA_U32 },
1054         };
1055         struct nlattr *cqm[NL80211_ATTR_CQM_MAX + 1];
1056         enum nl80211_cqm_rssi_threshold_event event;
1057         union wpa_event_data ed;
1058         int sig, res;
1059
1060         if (tb[NL80211_ATTR_CQM] == NULL ||
1061             nla_parse_nested(cqm, NL80211_ATTR_CQM_MAX, tb[NL80211_ATTR_CQM],
1062                              cqm_policy)) {
1063                 wpa_printf(MSG_DEBUG, "nl80211: Ignore invalid CQM event");
1064                 return;
1065         }
1066
1067         if (cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT] == NULL)
1068                 return;
1069         event = nla_get_u32(cqm[NL80211_ATTR_CQM_RSSI_THRESHOLD_EVENT]);
1070
1071         os_memset(&ed, 0, sizeof(ed));
1072
1073         if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH) {
1074                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1075                            "event: RSSI high");
1076                 ed.signal_change.above_threshold = 1;
1077         } else if (event == NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW) {
1078                 wpa_printf(MSG_DEBUG, "nl80211: Connection quality monitor "
1079                            "event: RSSI low");
1080                 ed.signal_change.above_threshold = 0;
1081         } else
1082                 return;
1083
1084         res = nl80211_get_link_signal(drv, &sig);
1085         if (res == 0) {
1086                 ed.signal_change.current_signal = sig;
1087                 wpa_printf(MSG_DEBUG, "nl80211: Signal: %d dBm", sig);
1088         }
1089
1090         wpa_supplicant_event(drv->ctx, EVENT_SIGNAL_CHANGE, &ed);
1091 }
1092
1093
1094 static int process_event(struct nl_msg *msg, void *arg)
1095 {
1096         struct wpa_driver_nl80211_data *drv = arg;
1097         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1098         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1099         union wpa_event_data data;
1100
1101         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1102                   genlmsg_attrlen(gnlh, 0), NULL);
1103
1104         if (tb[NL80211_ATTR_IFINDEX]) {
1105                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
1106                 if (ifindex != drv->ifindex && !have_ifidx(drv, ifindex)) {
1107                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
1108                                    " for foreign interface (ifindex %d)",
1109                                    gnlh->cmd, ifindex);
1110                         return NL_SKIP;
1111                 }
1112         }
1113
1114         if (drv->ap_scan_as_station &&
1115             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
1116              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
1117                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1118                                             IEEE80211_MODE_AP);
1119                 drv->ap_scan_as_station = 0;
1120         }
1121
1122         switch (gnlh->cmd) {
1123         case NL80211_CMD_TRIGGER_SCAN:
1124                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
1125                 break;
1126         case NL80211_CMD_NEW_SCAN_RESULTS:
1127                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
1128                 drv->scan_complete_events = 1;
1129                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1130                                      drv->ctx);
1131                 send_scan_event(drv, 0, tb);
1132                 break;
1133         case NL80211_CMD_SCAN_ABORTED:
1134                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
1135                 /*
1136                  * Need to indicate that scan results are available in order
1137                  * not to make wpa_supplicant stop its scanning.
1138                  */
1139                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
1140                                      drv->ctx);
1141                 send_scan_event(drv, 1, tb);
1142                 break;
1143         case NL80211_CMD_AUTHENTICATE:
1144         case NL80211_CMD_ASSOCIATE:
1145         case NL80211_CMD_DEAUTHENTICATE:
1146         case NL80211_CMD_DISASSOCIATE:
1147         case NL80211_CMD_ACTION:
1148         case NL80211_CMD_ACTION_TX_STATUS:
1149                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
1150                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
1151                            tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
1152                            tb[NL80211_ATTR_COOKIE]);
1153                 break;
1154         case NL80211_CMD_CONNECT:
1155         case NL80211_CMD_ROAM:
1156                 mlme_event_connect(drv, gnlh->cmd,
1157                                    tb[NL80211_ATTR_STATUS_CODE],
1158                                    tb[NL80211_ATTR_MAC],
1159                                    tb[NL80211_ATTR_REQ_IE],
1160                                    tb[NL80211_ATTR_RESP_IE]);
1161                 break;
1162         case NL80211_CMD_DISCONNECT:
1163                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1164                         /*
1165                          * Avoid reporting two disassociation events that could
1166                          * confuse the core code.
1167                          */
1168                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
1169                                    "event when using userspace SME");
1170                         break;
1171                 }
1172                 drv->associated = 0;
1173                 os_memset(&data, 0, sizeof(data));
1174                 if (tb[NL80211_ATTR_REASON_CODE])
1175                         data.disassoc_info.reason_code =
1176                                 nla_get_u16(tb[NL80211_ATTR_REASON_CODE]);
1177                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, &data);
1178                 break;
1179         case NL80211_CMD_MICHAEL_MIC_FAILURE:
1180                 mlme_event_michael_mic_failure(drv, tb);
1181                 break;
1182         case NL80211_CMD_JOIN_IBSS:
1183                 mlme_event_join_ibss(drv, tb);
1184                 break;
1185         case NL80211_CMD_REMAIN_ON_CHANNEL:
1186                 mlme_event_remain_on_channel(drv, 0, tb);
1187                 break;
1188         case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
1189                 mlme_event_remain_on_channel(drv, 1, tb);
1190                 break;
1191         case NL80211_CMD_NOTIFY_CQM:
1192                 nl80211_cqm_event(drv, tb);
1193                 break;
1194         default:
1195                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
1196                            "(cmd=%d)", gnlh->cmd);
1197                 break;
1198         }
1199
1200         return NL_SKIP;
1201 }
1202
1203
1204 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
1205                                              void *sock_ctx)
1206 {
1207         struct nl_cb *cb;
1208         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1209
1210         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
1211
1212         cb = nl_cb_clone(drv->nl_cb);
1213         if (!cb)
1214                 return;
1215         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
1216         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
1217         nl_recvmsgs(drv->nl_handle_event, cb);
1218         nl_cb_put(cb);
1219 }
1220
1221
1222 /**
1223  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1224  * @priv: driver_nl80211 private data
1225  * @alpha2_arg: country to which to switch to
1226  * Returns: 0 on success, -1 on failure
1227  *
1228  * This asks nl80211 to set the regulatory domain for given
1229  * country ISO / IEC alpha2.
1230  */
1231 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1232 {
1233         struct i802_bss *bss = priv;
1234         struct wpa_driver_nl80211_data *drv = bss->drv;
1235         char alpha2[3];
1236         struct nl_msg *msg;
1237
1238         msg = nlmsg_alloc();
1239         if (!msg)
1240                 return -ENOMEM;
1241
1242         alpha2[0] = alpha2_arg[0];
1243         alpha2[1] = alpha2_arg[1];
1244         alpha2[2] = '\0';
1245
1246         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1247                     0, NL80211_CMD_REQ_SET_REG, 0);
1248
1249         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1250         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1251                 return -EINVAL;
1252         return 0;
1253 nla_put_failure:
1254         return -EINVAL;
1255 }
1256
1257
1258 #ifndef HOSTAPD
1259 struct wiphy_info_data {
1260         int max_scan_ssids;
1261         int ap_supported;
1262         int auth_supported;
1263         int connect_supported;
1264 };
1265
1266
1267 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1268 {
1269         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1270         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1271         struct wiphy_info_data *info = arg;
1272
1273         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1274                   genlmsg_attrlen(gnlh, 0), NULL);
1275
1276         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1277                 info->max_scan_ssids =
1278                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1279
1280         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1281                 struct nlattr *nl_mode;
1282                 int i;
1283                 nla_for_each_nested(nl_mode,
1284                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1285                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1286                                 info->ap_supported = 1;
1287                                 break;
1288                         }
1289                 }
1290         }
1291
1292         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1293                 struct nlattr *nl_cmd;
1294                 int i;
1295
1296                 nla_for_each_nested(nl_cmd,
1297                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1298                         u32 cmd = nla_get_u32(nl_cmd);
1299                         if (cmd == NL80211_CMD_AUTHENTICATE)
1300                                 info->auth_supported = 1;
1301                         else if (cmd == NL80211_CMD_CONNECT)
1302                                 info->connect_supported = 1;
1303                 }
1304         }
1305
1306         return NL_SKIP;
1307 }
1308
1309
1310 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1311                                        struct wiphy_info_data *info)
1312 {
1313         struct nl_msg *msg;
1314
1315         os_memset(info, 0, sizeof(*info));
1316         msg = nlmsg_alloc();
1317         if (!msg)
1318                 return -1;
1319
1320         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1321                     0, NL80211_CMD_GET_WIPHY, 0);
1322
1323         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->first_bss.ifindex);
1324
1325         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1326                 return 0;
1327         msg = NULL;
1328 nla_put_failure:
1329         nlmsg_free(msg);
1330         return -1;
1331 }
1332
1333
1334 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1335 {
1336         struct wiphy_info_data info;
1337         if (wpa_driver_nl80211_get_info(drv, &info))
1338                 return -1;
1339         drv->has_capability = 1;
1340         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1341         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1342                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1343                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1344                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1345         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1346                 WPA_DRIVER_CAPA_ENC_WEP104 |
1347                 WPA_DRIVER_CAPA_ENC_TKIP |
1348                 WPA_DRIVER_CAPA_ENC_CCMP;
1349         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1350                 WPA_DRIVER_AUTH_SHARED |
1351                 WPA_DRIVER_AUTH_LEAP;
1352
1353         drv->capa.max_scan_ssids = info.max_scan_ssids;
1354         if (info.ap_supported)
1355                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1356
1357         if (info.auth_supported)
1358                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1359         else if (!info.connect_supported) {
1360                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1361                            "authentication/association or connect commands");
1362                 return -1;
1363         }
1364
1365         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1366         drv->capa.flags |= WPA_DRIVER_FLAGS_P2P_CAPABLE;
1367         drv->capa.max_remain_on_chan = 5000;
1368
1369         return 0;
1370 }
1371 #endif /* HOSTAPD */
1372
1373
1374 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv)
1375 {
1376         int ret;
1377
1378         /* Initialize generic netlink and nl80211 */
1379
1380         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1381         if (drv->nl_cb == NULL) {
1382                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1383                            "callbacks");
1384                 goto err1;
1385         }
1386
1387         drv->nl_handle = nl80211_handle_alloc(drv->nl_cb);
1388         if (drv->nl_handle == NULL) {
1389                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1390                            "callbacks");
1391                 goto err2;
1392         }
1393
1394         drv->nl_handle_event = nl80211_handle_alloc(drv->nl_cb);
1395         if (drv->nl_handle_event == NULL) {
1396                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1397                            "callbacks (event)");
1398                 goto err2b;
1399         }
1400
1401         if (genl_connect(drv->nl_handle)) {
1402                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1403                            "netlink");
1404                 goto err3;
1405         }
1406
1407         if (genl_connect(drv->nl_handle_event)) {
1408                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1409                            "netlink (event)");
1410                 goto err3;
1411         }
1412
1413 #ifdef CONFIG_LIBNL20
1414         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1415                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1416                            "netlink cache");
1417                 goto err3;
1418         }
1419         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1420             0) {
1421                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1422                            "netlink cache (event)");
1423                 goto err3b;
1424         }
1425 #else /* CONFIG_LIBNL20 */
1426         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1427         if (drv->nl_cache == NULL) {
1428                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1429                            "netlink cache");
1430                 goto err3;
1431         }
1432         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1433         if (drv->nl_cache_event == NULL) {
1434                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1435                            "netlink cache (event)");
1436                 goto err3b;
1437         }
1438 #endif /* CONFIG_LIBNL20 */
1439
1440         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1441         if (drv->nl80211 == NULL) {
1442                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1443                            "found");
1444                 goto err4;
1445         }
1446
1447         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1448         if (ret >= 0)
1449                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1450         if (ret < 0) {
1451                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1452                            "membership for scan events: %d (%s)",
1453                            ret, strerror(-ret));
1454                 goto err4;
1455         }
1456
1457         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1458         if (ret >= 0)
1459                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1460         if (ret < 0) {
1461                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1462                            "membership for mlme events: %d (%s)",
1463                            ret, strerror(-ret));
1464                 goto err4;
1465         }
1466
1467         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1468                                  wpa_driver_nl80211_event_receive, drv, NULL);
1469
1470         return 0;
1471
1472 err4:
1473         nl_cache_free(drv->nl_cache_event);
1474 err3b:
1475         nl_cache_free(drv->nl_cache);
1476 err3:
1477         nl80211_handle_destroy(drv->nl_handle_event);
1478 err2b:
1479         nl80211_handle_destroy(drv->nl_handle);
1480 err2:
1481         nl_cb_put(drv->nl_cb);
1482 err1:
1483         return -1;
1484 }
1485
1486
1487 static void wpa_driver_nl80211_rfkill_blocked(void *ctx)
1488 {
1489         wpa_printf(MSG_DEBUG, "nl80211: RFKILL blocked");
1490         /*
1491          * This may be for any interface; use ifdown event to disable
1492          * interface.
1493          */
1494 }
1495
1496
1497 static void wpa_driver_nl80211_rfkill_unblocked(void *ctx)
1498 {
1499         struct wpa_driver_nl80211_data *drv = ctx;
1500         wpa_printf(MSG_DEBUG, "nl80211: RFKILL unblocked");
1501         if (linux_set_iface_flags(drv->ioctl_sock, drv->first_bss.ifname, 1)) {
1502                 wpa_printf(MSG_DEBUG, "nl80211: Could not set interface UP "
1503                            "after rfkill unblock");
1504                 return;
1505         }
1506         /* rtnetlink ifup handler will report interface as enabled */
1507 }
1508
1509
1510 /**
1511  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1512  * @ctx: context to be used when calling wpa_supplicant functions,
1513  * e.g., wpa_supplicant_event()
1514  * @ifname: interface name, e.g., wlan0
1515  * Returns: Pointer to private data, %NULL on failure
1516  */
1517 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1518 {
1519         struct wpa_driver_nl80211_data *drv;
1520         struct netlink_config *cfg;
1521         struct rfkill_config *rcfg;
1522         struct i802_bss *bss;
1523
1524         drv = os_zalloc(sizeof(*drv));
1525         if (drv == NULL)
1526                 return NULL;
1527         drv->ctx = ctx;
1528         bss = &drv->first_bss;
1529         bss->drv = drv;
1530         os_strlcpy(bss->ifname, ifname, sizeof(bss->ifname));
1531         drv->monitor_ifidx = -1;
1532         drv->monitor_sock = -1;
1533         drv->ioctl_sock = -1;
1534
1535         if (wpa_driver_nl80211_init_nl(drv)) {
1536                 os_free(drv);
1537                 return NULL;
1538         }
1539
1540         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1541         if (drv->ioctl_sock < 0) {
1542                 perror("socket(PF_INET,SOCK_DGRAM)");
1543                 goto failed;
1544         }
1545
1546         cfg = os_zalloc(sizeof(*cfg));
1547         if (cfg == NULL)
1548                 goto failed;
1549         cfg->ctx = drv;
1550         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1551         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1552         drv->netlink = netlink_init(cfg);
1553         if (drv->netlink == NULL) {
1554                 os_free(cfg);
1555                 goto failed;
1556         }
1557
1558         rcfg = os_zalloc(sizeof(*rcfg));
1559         if (rcfg == NULL)
1560                 goto failed;
1561         rcfg->ctx = drv;
1562         os_strlcpy(rcfg->ifname, ifname, sizeof(rcfg->ifname));
1563         rcfg->blocked_cb = wpa_driver_nl80211_rfkill_blocked;
1564         rcfg->unblocked_cb = wpa_driver_nl80211_rfkill_unblocked;
1565         drv->rfkill = rfkill_init(rcfg);
1566         if (drv->rfkill == NULL) {
1567                 wpa_printf(MSG_DEBUG, "nl80211: RFKILL status not available");
1568                 os_free(rcfg);
1569         }
1570
1571         if (wpa_driver_nl80211_finish_drv_init(drv))
1572                 goto failed;
1573
1574         return bss;
1575
1576 failed:
1577         rfkill_deinit(drv->rfkill);
1578         netlink_deinit(drv->netlink);
1579         if (drv->ioctl_sock >= 0)
1580                 close(drv->ioctl_sock);
1581
1582         genl_family_put(drv->nl80211);
1583         nl_cache_free(drv->nl_cache);
1584         nl80211_handle_destroy(drv->nl_handle);
1585         nl_cb_put(drv->nl_cb);
1586         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1587
1588         os_free(drv);
1589         return NULL;
1590 }
1591
1592
1593 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
1594                                          const u8 *match, size_t match_len)
1595 {
1596         struct nl_msg *msg;
1597         int ret = -1;
1598
1599         msg = nlmsg_alloc();
1600         if (!msg)
1601                 return -1;
1602
1603         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1604                     NL80211_CMD_REGISTER_ACTION, 0);
1605
1606         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1607         NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
1608
1609         ret = send_and_recv(drv, drv->nl_handle_event, msg, NULL, NULL);
1610         msg = NULL;
1611         if (ret) {
1612                 wpa_printf(MSG_DEBUG, "nl80211: Register Action command "
1613                            "failed: ret=%d (%s)", ret, strerror(-ret));
1614                 wpa_hexdump(MSG_DEBUG, "nl80211: Register Action match",
1615                             match, match_len);
1616                 goto nla_put_failure;
1617         }
1618         ret = 0;
1619 nla_put_failure:
1620         nlmsg_free(msg);
1621         return ret;
1622 }
1623
1624
1625 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
1626 {
1627 #ifdef CONFIG_P2P
1628         /* GAS Initial Request */
1629         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0a", 2) < 0)
1630                 return -1;
1631         /* GAS Initial Response */
1632         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0b", 2) < 0)
1633                 return -1;
1634         /* GAS Comeback Request */
1635         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0c", 2) < 0)
1636                 return -1;
1637         /* GAS Comeback Response */
1638         if (nl80211_register_action_frame(drv, (u8 *) "\x04\x0d", 2) < 0)
1639                 return -1;
1640         /* P2P Public Action */
1641         if (nl80211_register_action_frame(drv,
1642                                           (u8 *) "\x04\x09\x50\x6f\x9a\x09",
1643                                           6) < 0)
1644                 return -1;
1645         /* P2P Action */
1646         if (nl80211_register_action_frame(drv,
1647                                           (u8 *) "\x7f\x50\x6f\x9a\x09",
1648                                           5) < 0)
1649                 return -1;
1650 #endif /* CONFIG_P2P */
1651
1652         /* FT Action frames */
1653         if (nl80211_register_action_frame(drv, (u8 *) "\x06", 1) < 0)
1654                 return -1;
1655         else
1656                 drv->capa.key_mgmt |= WPA_DRIVER_CAPA_KEY_MGMT_FT |
1657                         WPA_DRIVER_CAPA_KEY_MGMT_FT_PSK;
1658
1659         return 0;
1660 }
1661
1662
1663 static void wpa_driver_nl80211_send_rfkill(void *eloop_ctx, void *timeout_ctx)
1664 {
1665         wpa_supplicant_event(timeout_ctx, EVENT_INTERFACE_DISABLED, NULL);
1666 }
1667
1668
1669 static int
1670 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1671 {
1672         struct i802_bss *bss = &drv->first_bss;
1673         int send_rfkill_event = 0;
1674
1675         drv->ifindex = if_nametoindex(bss->ifname);
1676         drv->first_bss.ifindex = drv->ifindex;
1677
1678 #ifndef HOSTAPD
1679         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA) < 0) {
1680                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1681                            "use managed mode");
1682         }
1683
1684         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
1685                 if (rfkill_is_blocked(drv->rfkill)) {
1686                         wpa_printf(MSG_DEBUG, "nl80211: Could not yet enable "
1687                                    "interface '%s' due to rfkill",
1688                                    bss->ifname);
1689                         drv->if_disabled = 1;
1690                         send_rfkill_event = 1;
1691                 } else {
1692                         wpa_printf(MSG_ERROR, "nl80211: Could not set "
1693                                    "interface '%s' UP", bss->ifname);
1694                         return -1;
1695                 }
1696         }
1697
1698         if (wpa_driver_nl80211_capa(drv))
1699                 return -1;
1700
1701         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1702                                1, IF_OPER_DORMANT);
1703 #endif /* HOSTAPD */
1704
1705         if (nl80211_register_action_frames(drv) < 0) {
1706                 wpa_printf(MSG_DEBUG, "nl80211: Failed to register Action "
1707                            "frame processing - ignore for now");
1708                 /*
1709                  * Older kernel versions did not support this, so ignore the
1710                  * error for now. Some functionality may not be available
1711                  * because of this.
1712                  */
1713         }
1714
1715         if (send_rfkill_event) {
1716                 eloop_register_timeout(0, 0, wpa_driver_nl80211_send_rfkill,
1717                                        drv, drv->ctx);
1718         }
1719
1720         return 0;
1721 }
1722
1723
1724 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1725 {
1726         struct nl_msg *msg;
1727
1728         msg = nlmsg_alloc();
1729         if (!msg)
1730                 return -ENOMEM;
1731
1732         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1733                     0, NL80211_CMD_DEL_BEACON, 0);
1734         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1735
1736         return send_and_recv_msgs(drv, msg, NULL, NULL);
1737  nla_put_failure:
1738         return -ENOBUFS;
1739 }
1740
1741
1742 /**
1743  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1744  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1745  *
1746  * Shut down driver interface and processing of driver events. Free
1747  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1748  */
1749 static void wpa_driver_nl80211_deinit(void *priv)
1750 {
1751         struct i802_bss *bss = priv;
1752         struct wpa_driver_nl80211_data *drv = bss->drv;
1753
1754         if (drv->added_if_into_bridge) {
1755                 if (linux_br_del_if(drv->ioctl_sock, drv->brname, bss->ifname)
1756                     < 0)
1757                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1758                                    "interface %s from bridge %s: %s",
1759                                    bss->ifname, drv->brname, strerror(errno));
1760         }
1761         if (drv->added_bridge) {
1762                 if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
1763                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1764                                    "bridge %s: %s",
1765                                    drv->brname, strerror(errno));
1766         }
1767
1768         nl80211_remove_monitor_interface(drv);
1769
1770         if (drv->nlmode == NL80211_IFTYPE_AP)
1771                 wpa_driver_nl80211_del_beacon(drv);
1772
1773 #ifdef HOSTAPD
1774         if (drv->last_freq_ht) {
1775                 /* Clear HT flags from the driver */
1776                 struct hostapd_freq_params freq;
1777                 os_memset(&freq, 0, sizeof(freq));
1778                 freq.freq = drv->last_freq;
1779                 i802_set_freq(priv, &freq);
1780         }
1781
1782         if (drv->eapol_sock >= 0) {
1783                 eloop_unregister_read_sock(drv->eapol_sock);
1784                 close(drv->eapol_sock);
1785         }
1786
1787         if (drv->if_indices != drv->default_if_indices)
1788                 os_free(drv->if_indices);
1789 #endif /* HOSTAPD */
1790
1791         if (drv->disable_11b_rates)
1792                 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
1793
1794         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1795         netlink_deinit(drv->netlink);
1796         rfkill_deinit(drv->rfkill);
1797
1798         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1799
1800         (void) linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0);
1801         wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_INFRA);
1802
1803         if (drv->ioctl_sock >= 0)
1804                 close(drv->ioctl_sock);
1805
1806         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1807         genl_family_put(drv->nl80211);
1808         nl_cache_free(drv->nl_cache);
1809         nl_cache_free(drv->nl_cache_event);
1810         nl80211_handle_destroy(drv->nl_handle);
1811         nl80211_handle_destroy(drv->nl_handle_event);
1812         nl_cb_put(drv->nl_cb);
1813
1814         eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1815                              drv, NULL);
1816
1817         os_free(drv->filter_ssids);
1818
1819         os_free(drv);
1820 }
1821
1822
1823 /**
1824  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1825  * @eloop_ctx: Driver private data
1826  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1827  *
1828  * This function can be used as registered timeout when starting a scan to
1829  * generate a scan completed event if the driver does not report this.
1830  */
1831 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1832 {
1833         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1834         if (drv->ap_scan_as_station) {
1835                 wpa_driver_nl80211_set_mode(&drv->first_bss,
1836                                             IEEE80211_MODE_AP);
1837                 drv->ap_scan_as_station = 0;
1838         }
1839         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1840         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1841 }
1842
1843
1844 /**
1845  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1846  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1847  * @params: Scan parameters
1848  * Returns: 0 on success, -1 on failure
1849  */
1850 static int wpa_driver_nl80211_scan(void *priv,
1851                                    struct wpa_driver_scan_params *params)
1852 {
1853         struct i802_bss *bss = priv;
1854         struct wpa_driver_nl80211_data *drv = bss->drv;
1855         int ret = 0, timeout;
1856         struct nl_msg *msg, *ssids, *freqs;
1857         size_t i;
1858
1859         msg = nlmsg_alloc();
1860         ssids = nlmsg_alloc();
1861         freqs = nlmsg_alloc();
1862         if (!msg || !ssids || !freqs) {
1863                 nlmsg_free(msg);
1864                 nlmsg_free(ssids);
1865                 nlmsg_free(freqs);
1866                 return -1;
1867         }
1868
1869         os_free(drv->filter_ssids);
1870         drv->filter_ssids = params->filter_ssids;
1871         params->filter_ssids = NULL;
1872         drv->num_filter_ssids = params->num_filter_ssids;
1873
1874         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1875                     NL80211_CMD_TRIGGER_SCAN, 0);
1876
1877         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1878
1879         for (i = 0; i < params->num_ssids; i++) {
1880                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan SSID",
1881                                   params->ssids[i].ssid,
1882                                   params->ssids[i].ssid_len);
1883                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1884                         params->ssids[i].ssid);
1885         }
1886         if (params->num_ssids)
1887                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1888
1889         if (params->extra_ies) {
1890                 wpa_hexdump_ascii(MSG_MSGDUMP, "nl80211: Scan extra IEs",
1891                                   params->extra_ies, params->extra_ies_len);
1892                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1893                         params->extra_ies);
1894         }
1895
1896         if (params->freqs) {
1897                 for (i = 0; params->freqs[i]; i++) {
1898                         wpa_printf(MSG_MSGDUMP, "nl80211: Scan frequency %u "
1899                                    "MHz", params->freqs[i]);
1900                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1901                 }
1902                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1903         }
1904
1905         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1906         msg = NULL;
1907         if (ret) {
1908                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1909                            "(%s)", ret, strerror(-ret));
1910 #ifdef HOSTAPD
1911                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1912                         /*
1913                          * mac80211 does not allow scan requests in AP mode, so
1914                          * try to do this in station mode.
1915                          */
1916                         if (wpa_driver_nl80211_set_mode(bss,
1917                                                         IEEE80211_MODE_INFRA))
1918                                 goto nla_put_failure;
1919
1920                         if (wpa_driver_nl80211_scan(drv, params)) {
1921                                 wpa_driver_nl80211_set_mode(bss,
1922                                                             IEEE80211_MODE_AP);
1923                                 goto nla_put_failure;
1924                         }
1925
1926                         /* Restore AP mode when processing scan results */
1927                         drv->ap_scan_as_station = 1;
1928                         ret = 0;
1929                 } else
1930                         goto nla_put_failure;
1931 #else /* HOSTAPD */
1932                 goto nla_put_failure;
1933 #endif /* HOSTAPD */
1934         }
1935
1936         /* Not all drivers generate "scan completed" wireless event, so try to
1937          * read results after a timeout. */
1938         timeout = 10;
1939         if (drv->scan_complete_events) {
1940                 /*
1941                  * The driver seems to deliver events to notify when scan is
1942                  * complete, so use longer timeout to avoid race conditions
1943                  * with scanning and following association request.
1944                  */
1945                 timeout = 30;
1946         }
1947         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1948                    "seconds", ret, timeout);
1949         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1950         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1951                                drv, drv->ctx);
1952
1953 nla_put_failure:
1954         nlmsg_free(ssids);
1955         nlmsg_free(msg);
1956         nlmsg_free(freqs);
1957         return ret;
1958 }
1959
1960
1961 static const u8 * nl80211_get_ie(const u8 *ies, size_t ies_len, u8 ie)
1962 {
1963         const u8 *end, *pos;
1964
1965         if (ies == NULL)
1966                 return NULL;
1967
1968         pos = ies;
1969         end = ies + ies_len;
1970
1971         while (pos + 1 < end) {
1972                 if (pos + 2 + pos[1] > end)
1973                         break;
1974                 if (pos[0] == ie)
1975                         return pos;
1976                 pos += 2 + pos[1];
1977         }
1978
1979         return NULL;
1980 }
1981
1982
1983 static int nl80211_scan_filtered(struct wpa_driver_nl80211_data *drv,
1984                                  const u8 *ie, size_t ie_len)
1985 {
1986         const u8 *ssid;
1987         size_t i;
1988
1989         if (drv->filter_ssids == NULL)
1990                 return 0;
1991
1992         ssid = nl80211_get_ie(ie, ie_len, WLAN_EID_SSID);
1993         if (ssid == NULL)
1994                 return 1;
1995
1996         for (i = 0; i < drv->num_filter_ssids; i++) {
1997                 if (ssid[1] == drv->filter_ssids[i].ssid_len &&
1998                     os_memcmp(ssid + 2, drv->filter_ssids[i].ssid, ssid[1]) ==
1999                     0)
2000                         return 0;
2001         }
2002
2003         return 1;
2004 }
2005
2006
2007 struct nl80211_bss_info_arg {
2008         struct wpa_driver_nl80211_data *drv;
2009         struct wpa_scan_results *res;
2010 };
2011
2012 static int bss_info_handler(struct nl_msg *msg, void *arg)
2013 {
2014         struct nlattr *tb[NL80211_ATTR_MAX + 1];
2015         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2016         struct nlattr *bss[NL80211_BSS_MAX + 1];
2017         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
2018                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
2019                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
2020                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
2021                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
2022                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
2023                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
2024                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
2025                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
2026                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
2027                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
2028                 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
2029         };
2030         struct nl80211_bss_info_arg *_arg = arg;
2031         struct wpa_scan_results *res = _arg->res;
2032         struct wpa_scan_res **tmp;
2033         struct wpa_scan_res *r;
2034         const u8 *ie, *beacon_ie;
2035         size_t ie_len, beacon_ie_len;
2036         u8 *pos;
2037
2038         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2039                   genlmsg_attrlen(gnlh, 0), NULL);
2040         if (!tb[NL80211_ATTR_BSS])
2041                 return NL_SKIP;
2042         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
2043                              bss_policy))
2044                 return NL_SKIP;
2045         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
2046                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2047                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
2048         } else {
2049                 ie = NULL;
2050                 ie_len = 0;
2051         }
2052         if (bss[NL80211_BSS_BEACON_IES]) {
2053                 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
2054                 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
2055         } else {
2056                 beacon_ie = NULL;
2057                 beacon_ie_len = 0;
2058         }
2059
2060         if (nl80211_scan_filtered(_arg->drv, ie ? ie : beacon_ie,
2061                                   ie ? ie_len : beacon_ie_len))
2062                 return NL_SKIP;
2063
2064         r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
2065         if (r == NULL)
2066                 return NL_SKIP;
2067         if (bss[NL80211_BSS_BSSID])
2068                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
2069                           ETH_ALEN);
2070         if (bss[NL80211_BSS_FREQUENCY])
2071                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
2072         if (bss[NL80211_BSS_BEACON_INTERVAL])
2073                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
2074         if (bss[NL80211_BSS_CAPABILITY])
2075                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
2076         r->flags |= WPA_SCAN_NOISE_INVALID;
2077         if (bss[NL80211_BSS_SIGNAL_MBM]) {
2078                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
2079                 r->level /= 100; /* mBm to dBm */
2080                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
2081         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
2082                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
2083                 r->flags |= WPA_SCAN_LEVEL_INVALID;
2084         } else
2085                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
2086         if (bss[NL80211_BSS_TSF])
2087                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
2088         if (bss[NL80211_BSS_SEEN_MS_AGO])
2089                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
2090         r->ie_len = ie_len;
2091         pos = (u8 *) (r + 1);
2092         if (ie) {
2093                 os_memcpy(pos, ie, ie_len);
2094                 pos += ie_len;
2095         }
2096         r->beacon_ie_len = beacon_ie_len;
2097         if (beacon_ie)
2098                 os_memcpy(pos, beacon_ie, beacon_ie_len);
2099
2100         if (bss[NL80211_BSS_STATUS]) {
2101                 enum nl80211_bss_status status;
2102                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
2103                 switch (status) {
2104                 case NL80211_BSS_STATUS_AUTHENTICATED:
2105                         r->flags |= WPA_SCAN_AUTHENTICATED;
2106                         break;
2107                 case NL80211_BSS_STATUS_ASSOCIATED:
2108                         r->flags |= WPA_SCAN_ASSOCIATED;
2109                         break;
2110                 default:
2111                         break;
2112                 }
2113         }
2114
2115         tmp = os_realloc(res->res,
2116                          (res->num + 1) * sizeof(struct wpa_scan_res *));
2117         if (tmp == NULL) {
2118                 os_free(r);
2119                 return NL_SKIP;
2120         }
2121         tmp[res->num++] = r;
2122         res->res = tmp;
2123
2124         return NL_SKIP;
2125 }
2126
2127
2128 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
2129                                  const u8 *addr)
2130 {
2131         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
2132                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
2133                            "mismatch (" MACSTR ")", MAC2STR(addr));
2134                 wpa_driver_nl80211_mlme(drv, addr,
2135                                         NL80211_CMD_DEAUTHENTICATE,
2136                                         WLAN_REASON_PREV_AUTH_NOT_VALID, 1);
2137         }
2138 }
2139
2140
2141 static void wpa_driver_nl80211_check_bss_status(
2142         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
2143 {
2144         size_t i;
2145
2146         for (i = 0; i < res->num; i++) {
2147                 struct wpa_scan_res *r = res->res[i];
2148                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
2149                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
2150                                    "indicates BSS status with " MACSTR
2151                                    " as authenticated",
2152                                    MAC2STR(r->bssid));
2153                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
2154                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
2155                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
2156                             0) {
2157                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
2158                                            " in local state (auth=" MACSTR
2159                                            " assoc=" MACSTR ")",
2160                                            MAC2STR(drv->auth_bssid),
2161                                            MAC2STR(drv->bssid));
2162                                 clear_state_mismatch(drv, r->bssid);
2163                         }
2164                 }
2165
2166                 if (r->flags & WPA_SCAN_ASSOCIATED) {
2167                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
2168                                    "indicate BSS status with " MACSTR
2169                                    " as associated",
2170                                    MAC2STR(r->bssid));
2171                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
2172                             !drv->associated) {
2173                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2174                                            "(not associated) does not match "
2175                                            "with BSS state");
2176                                 clear_state_mismatch(drv, r->bssid);
2177                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
2178                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
2179                                    0) {
2180                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
2181                                            "(associated with " MACSTR ") does "
2182                                            "not match with BSS state",
2183                                            MAC2STR(drv->bssid));
2184                                 clear_state_mismatch(drv, r->bssid);
2185                                 clear_state_mismatch(drv, drv->bssid);
2186                         }
2187                 }
2188         }
2189 }
2190
2191
2192 static void wpa_scan_results_free(struct wpa_scan_results *res)
2193 {
2194         size_t i;
2195
2196         if (res == NULL)
2197                 return;
2198
2199         for (i = 0; i < res->num; i++)
2200                 os_free(res->res[i]);
2201         os_free(res->res);
2202         os_free(res);
2203 }
2204
2205
2206 static struct wpa_scan_results *
2207 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
2208 {
2209         struct nl_msg *msg;
2210         struct wpa_scan_results *res;
2211         int ret;
2212         struct nl80211_bss_info_arg arg;
2213
2214         res = os_zalloc(sizeof(*res));
2215         if (res == NULL)
2216                 return NULL;
2217         msg = nlmsg_alloc();
2218         if (!msg)
2219                 goto nla_put_failure;
2220
2221         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
2222                     NL80211_CMD_GET_SCAN, 0);
2223         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2224
2225         arg.drv = drv;
2226         arg.res = res;
2227         ret = send_and_recv_msgs(drv, msg, bss_info_handler, &arg);
2228         msg = NULL;
2229         if (ret == 0) {
2230                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
2231                            (unsigned long) res->num);
2232                 return res;
2233         }
2234         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
2235                    "(%s)", ret, strerror(-ret));
2236 nla_put_failure:
2237         nlmsg_free(msg);
2238         wpa_scan_results_free(res);
2239         return NULL;
2240 }
2241
2242
2243 /**
2244  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
2245  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
2246  * Returns: Scan results on success, -1 on failure
2247  */
2248 static struct wpa_scan_results *
2249 wpa_driver_nl80211_get_scan_results(void *priv)
2250 {
2251         struct i802_bss *bss = priv;
2252         struct wpa_driver_nl80211_data *drv = bss->drv;
2253         struct wpa_scan_results *res;
2254
2255         res = nl80211_get_scan_results(drv);
2256         if (res)
2257                 wpa_driver_nl80211_check_bss_status(drv, res);
2258         return res;
2259 }
2260
2261
2262 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
2263 {
2264         struct wpa_scan_results *res;
2265         size_t i;
2266
2267         res = nl80211_get_scan_results(drv);
2268         if (res == NULL) {
2269                 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
2270                 return;
2271         }
2272
2273         wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
2274         for (i = 0; i < res->num; i++) {
2275                 struct wpa_scan_res *r = res->res[i];
2276                 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
2277                            (int) i, (int) res->num, MAC2STR(r->bssid),
2278                            r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
2279                            r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
2280         }
2281
2282         wpa_scan_results_free(res);
2283 }
2284
2285
2286 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
2287                                       enum wpa_alg alg, const u8 *addr,
2288                                       int key_idx, int set_tx,
2289                                       const u8 *seq, size_t seq_len,
2290                                       const u8 *key, size_t key_len)
2291 {
2292         struct i802_bss *bss = priv;
2293         struct wpa_driver_nl80211_data *drv = bss->drv;
2294         int ifindex = if_nametoindex(ifname);
2295         struct nl_msg *msg;
2296         int ret;
2297
2298         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
2299                    "set_tx=%d seq_len=%lu key_len=%lu",
2300                    __func__, ifindex, alg, addr, key_idx, set_tx,
2301                    (unsigned long) seq_len, (unsigned long) key_len);
2302
2303         msg = nlmsg_alloc();
2304         if (!msg)
2305                 return -ENOMEM;
2306
2307         if (alg == WPA_ALG_NONE) {
2308                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2309                             0, NL80211_CMD_DEL_KEY, 0);
2310         } else {
2311                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2312                             0, NL80211_CMD_NEW_KEY, 0);
2313                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
2314                 switch (alg) {
2315                 case WPA_ALG_WEP:
2316                         if (key_len == 5)
2317                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2318                                             WLAN_CIPHER_SUITE_WEP40);
2319                         else
2320                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2321                                             WLAN_CIPHER_SUITE_WEP104);
2322                         break;
2323                 case WPA_ALG_TKIP:
2324                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2325                                     WLAN_CIPHER_SUITE_TKIP);
2326                         break;
2327                 case WPA_ALG_CCMP:
2328                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2329                                     WLAN_CIPHER_SUITE_CCMP);
2330                         break;
2331                 case WPA_ALG_IGTK:
2332                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2333                                     WLAN_CIPHER_SUITE_AES_CMAC);
2334                         break;
2335                 default:
2336                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2337                                    "algorithm %d", __func__, alg);
2338                         nlmsg_free(msg);
2339                         return -1;
2340                 }
2341         }
2342
2343         if (seq && seq_len)
2344                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
2345
2346         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
2347         {
2348                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
2349                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2350         }
2351         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2352         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2353
2354         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2355         if ((ret == -ENOENT || ret == -ENOLINK) && alg == WPA_ALG_NONE)
2356                 ret = 0;
2357         if (ret)
2358                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
2359                            ret, strerror(-ret));
2360
2361         /*
2362          * If we failed or don't need to set the default TX key (below),
2363          * we're done here.
2364          */
2365         if (ret || !set_tx || alg == WPA_ALG_NONE)
2366                 return ret;
2367 #ifdef HOSTAPD
2368         if (addr)
2369                 return ret;
2370 #else /* HOSTAPD */
2371         if (drv->nlmode == NL80211_IFTYPE_AP && addr)
2372                 return ret;
2373 #endif /* HOSTAPD */
2374
2375         msg = nlmsg_alloc();
2376         if (!msg)
2377                 return -ENOMEM;
2378
2379         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2380                     0, NL80211_CMD_SET_KEY, 0);
2381         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
2382         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2383         if (alg == WPA_ALG_IGTK)
2384                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2385         else
2386                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2387
2388         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2389         if (ret == -ENOENT)
2390                 ret = 0;
2391         if (ret)
2392                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
2393                            "err=%d %s)", ret, strerror(-ret));
2394         return ret;
2395
2396 nla_put_failure:
2397         return -ENOBUFS;
2398 }
2399
2400
2401 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
2402                       int key_idx, int defkey,
2403                       const u8 *seq, size_t seq_len,
2404                       const u8 *key, size_t key_len)
2405 {
2406         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
2407         if (!key_attr)
2408                 return -1;
2409
2410         if (defkey && alg == WPA_ALG_IGTK)
2411                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
2412         else if (defkey)
2413                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2414
2415         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
2416
2417         switch (alg) {
2418         case WPA_ALG_WEP:
2419                 if (key_len == 5)
2420                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2421                                     WLAN_CIPHER_SUITE_WEP40);
2422                 else
2423                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2424                                     WLAN_CIPHER_SUITE_WEP104);
2425                 break;
2426         case WPA_ALG_TKIP:
2427                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
2428                 break;
2429         case WPA_ALG_CCMP:
2430                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
2431                 break;
2432         case WPA_ALG_IGTK:
2433                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2434                             WLAN_CIPHER_SUITE_AES_CMAC);
2435                 break;
2436         default:
2437                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2438                            "algorithm %d", __func__, alg);
2439                 return -1;
2440         }
2441
2442         if (seq && seq_len)
2443                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
2444
2445         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
2446
2447         nla_nest_end(msg, key_attr);
2448
2449         return 0;
2450  nla_put_failure:
2451         return -1;
2452 }
2453
2454
2455 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
2456                                  struct nl_msg *msg)
2457 {
2458         int i, privacy = 0;
2459         struct nlattr *nl_keys, *nl_key;
2460
2461         for (i = 0; i < 4; i++) {
2462                 if (!params->wep_key[i])
2463                         continue;
2464                 privacy = 1;
2465                 break;
2466         }
2467         if (!privacy)
2468                 return 0;
2469
2470         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2471
2472         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2473         if (!nl_keys)
2474                 goto nla_put_failure;
2475
2476         for (i = 0; i < 4; i++) {
2477                 if (!params->wep_key[i])
2478                         continue;
2479
2480                 nl_key = nla_nest_start(msg, i);
2481                 if (!nl_key)
2482                         goto nla_put_failure;
2483
2484                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2485                         params->wep_key[i]);
2486                 if (params->wep_key_len[i] == 5)
2487                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2488                                     WLAN_CIPHER_SUITE_WEP40);
2489                 else
2490                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2491                                     WLAN_CIPHER_SUITE_WEP104);
2492
2493                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2494
2495                 if (i == params->wep_tx_keyidx)
2496                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2497
2498                 nla_nest_end(msg, nl_key);
2499         }
2500         nla_nest_end(msg, nl_keys);
2501
2502         return 0;
2503
2504 nla_put_failure:
2505         return -ENOBUFS;
2506 }
2507
2508
2509 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2510                                    const u8 *addr, int cmd, u16 reason_code,
2511                                    int local_state_change)
2512 {
2513         int ret = -1;
2514         struct nl_msg *msg;
2515
2516         msg = nlmsg_alloc();
2517         if (!msg)
2518                 return -1;
2519
2520         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2521
2522         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2523         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2524         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2525         if (local_state_change)
2526                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2527
2528         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2529         msg = NULL;
2530         if (ret) {
2531                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2532                            "(%s)", ret, strerror(-ret));
2533                 goto nla_put_failure;
2534         }
2535         ret = 0;
2536
2537 nla_put_failure:
2538         nlmsg_free(msg);
2539         return ret;
2540 }
2541
2542
2543 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2544                                          const u8 *addr, int reason_code)
2545 {
2546         wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
2547                    __func__, MAC2STR(addr), reason_code);
2548         drv->associated = 0;
2549         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2550                                        reason_code, 0);
2551 }
2552
2553
2554 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2555                                              int reason_code)
2556 {
2557         struct i802_bss *bss = priv;
2558         struct wpa_driver_nl80211_data *drv = bss->drv;
2559         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2560                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2561         wpa_printf(MSG_DEBUG, "%s(addr=" MACSTR " reason_code=%d)",
2562                    __func__, MAC2STR(addr), reason_code);
2563         drv->associated = 0;
2564         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2565                                        reason_code, 0);
2566 }
2567
2568
2569 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2570                                            int reason_code)
2571 {
2572         struct i802_bss *bss = priv;
2573         struct wpa_driver_nl80211_data *drv = bss->drv;
2574         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2575                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2576         wpa_printf(MSG_DEBUG, "%s", __func__);
2577         drv->associated = 0;
2578         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2579                                        reason_code, 0);
2580 }
2581
2582
2583 static int wpa_driver_nl80211_authenticate(
2584         void *priv, struct wpa_driver_auth_params *params)
2585 {
2586         struct i802_bss *bss = priv;
2587         struct wpa_driver_nl80211_data *drv = bss->drv;
2588         int ret = -1, i;
2589         struct nl_msg *msg;
2590         enum nl80211_auth_type type;
2591         int count = 0;
2592
2593         drv->associated = 0;
2594         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2595         /* FIX: IBSS mode */
2596         if (drv->nlmode != NL80211_IFTYPE_STATION)
2597                 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2598
2599         if (wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA) < 0)
2600                 return -1;
2601
2602 retry:
2603         msg = nlmsg_alloc();
2604         if (!msg)
2605                 return -1;
2606
2607         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2608                    drv->ifindex);
2609
2610         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2611                     NL80211_CMD_AUTHENTICATE, 0);
2612
2613         for (i = 0; i < 4; i++) {
2614                 if (!params->wep_key[i])
2615                         continue;
2616                 wpa_driver_nl80211_set_key(bss->ifname, priv, WPA_ALG_WEP,
2617                                            NULL, i,
2618                                            i == params->wep_tx_keyidx, NULL, 0,
2619                                            params->wep_key[i],
2620                                            params->wep_key_len[i]);
2621                 if (params->wep_tx_keyidx != i)
2622                         continue;
2623                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2624                                params->wep_key[i], params->wep_key_len[i])) {
2625                         nlmsg_free(msg);
2626                         return -1;
2627                 }
2628         }
2629
2630         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2631         if (params->bssid) {
2632                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2633                            MAC2STR(params->bssid));
2634                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2635         }
2636         if (params->freq) {
2637                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2638                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2639         }
2640         if (params->ssid) {
2641                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2642                                   params->ssid, params->ssid_len);
2643                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2644                         params->ssid);
2645         }
2646         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2647         if (params->ie)
2648                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2649         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2650                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2651         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2652                 type = NL80211_AUTHTYPE_SHARED_KEY;
2653         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2654                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2655         else if (params->auth_alg & WPA_AUTH_ALG_FT)
2656                 type = NL80211_AUTHTYPE_FT;
2657         else
2658                 goto nla_put_failure;
2659         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2660         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2661         if (params->local_state_change) {
2662                 wpa_printf(MSG_DEBUG, "  * Local state change only");
2663                 NLA_PUT_FLAG(msg, NL80211_ATTR_LOCAL_STATE_CHANGE);
2664         }
2665
2666         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2667         msg = NULL;
2668         if (ret) {
2669                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2670                            "(%s)", ret, strerror(-ret));
2671                 count++;
2672                 if (ret == -EALREADY && count == 1 && params->bssid &&
2673                     !params->local_state_change) {
2674                         /*
2675                          * mac80211 does not currently accept new
2676                          * authentication if we are already authenticated. As a
2677                          * workaround, force deauthentication and try again.
2678                          */
2679                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2680                                    "after forced deauthentication");
2681                         wpa_driver_nl80211_deauthenticate(
2682                                 bss, params->bssid,
2683                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2684                         nlmsg_free(msg);
2685                         goto retry;
2686                 }
2687                 goto nla_put_failure;
2688         }
2689         ret = 0;
2690         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2691                    "successfully");
2692
2693 nla_put_failure:
2694         nlmsg_free(msg);
2695         return ret;
2696 }
2697
2698
2699 struct phy_info_arg {
2700         u16 *num_modes;
2701         struct hostapd_hw_modes *modes;
2702 };
2703
2704 static int phy_info_handler(struct nl_msg *msg, void *arg)
2705 {
2706         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2707         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2708         struct phy_info_arg *phy_info = arg;
2709
2710         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2711
2712         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2713         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2714                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2715                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2716                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2717                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2718                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2719                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2720         };
2721
2722         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2723         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2724                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2725                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2726         };
2727
2728         struct nlattr *nl_band;
2729         struct nlattr *nl_freq;
2730         struct nlattr *nl_rate;
2731         int rem_band, rem_freq, rem_rate;
2732         struct hostapd_hw_modes *mode;
2733         int idx, mode_is_set;
2734
2735         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2736                   genlmsg_attrlen(gnlh, 0), NULL);
2737
2738         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2739                 return NL_SKIP;
2740
2741         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2742                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2743                 if (!mode)
2744                         return NL_SKIP;
2745                 phy_info->modes = mode;
2746
2747                 mode_is_set = 0;
2748
2749                 mode = &phy_info->modes[*(phy_info->num_modes)];
2750                 memset(mode, 0, sizeof(*mode));
2751                 *(phy_info->num_modes) += 1;
2752
2753                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2754                           nla_len(nl_band), NULL);
2755
2756                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2757                         mode->ht_capab = nla_get_u16(
2758                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2759                 }
2760
2761                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2762                         mode->a_mpdu_params |= nla_get_u8(
2763                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2764                                 0x03;
2765                 }
2766
2767                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2768                         mode->a_mpdu_params |= nla_get_u8(
2769                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2770                                 2;
2771                 }
2772
2773                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2774                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2775                         u8 *mcs;
2776                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2777                         os_memcpy(mode->mcs_set, mcs, 16);
2778                 }
2779
2780                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2781                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2782                                   nla_len(nl_freq), freq_policy);
2783                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2784                                 continue;
2785                         mode->num_channels++;
2786                 }
2787
2788                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2789                 if (!mode->channels)
2790                         return NL_SKIP;
2791
2792                 idx = 0;
2793
2794                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2795                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2796                                   nla_len(nl_freq), freq_policy);
2797                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2798                                 continue;
2799
2800                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2801                         mode->channels[idx].flag = 0;
2802
2803                         if (!mode_is_set) {
2804                                 /* crude heuristic */
2805                                 if (mode->channels[idx].freq < 4000)
2806                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2807                                 else
2808                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2809                                 mode_is_set = 1;
2810                         }
2811
2812                         /* crude heuristic */
2813                         if (mode->channels[idx].freq < 4000)
2814                                 if (mode->channels[idx].freq == 2484)
2815                                         mode->channels[idx].chan = 14;
2816                                 else
2817                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2818                         else
2819                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2820
2821                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2822                                 mode->channels[idx].flag |=
2823                                         HOSTAPD_CHAN_DISABLED;
2824                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2825                                 mode->channels[idx].flag |=
2826                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2827                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2828                                 mode->channels[idx].flag |=
2829                                         HOSTAPD_CHAN_NO_IBSS;
2830                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2831                                 mode->channels[idx].flag |=
2832                                         HOSTAPD_CHAN_RADAR;
2833
2834                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2835                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2836                                 mode->channels[idx].max_tx_power =
2837                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2838
2839                         idx++;
2840                 }
2841
2842                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2843                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2844                                   nla_len(nl_rate), rate_policy);
2845                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2846                                 continue;
2847                         mode->num_rates++;
2848                 }
2849
2850                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2851                 if (!mode->rates)
2852                         return NL_SKIP;
2853
2854                 idx = 0;
2855
2856                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2857                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2858                                   nla_len(nl_rate), rate_policy);
2859                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2860                                 continue;
2861                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2862
2863                         /* crude heuristic */
2864                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2865                             mode->rates[idx] > 200)
2866                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2867
2868                         idx++;
2869                 }
2870         }
2871
2872         return NL_SKIP;
2873 }
2874
2875 static struct hostapd_hw_modes *
2876 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2877 {
2878         u16 m;
2879         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2880         int i, mode11g_idx = -1;
2881
2882         /* If only 802.11g mode is included, use it to construct matching
2883          * 802.11b mode data. */
2884
2885         for (m = 0; m < *num_modes; m++) {
2886                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2887                         return modes; /* 802.11b already included */
2888                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2889                         mode11g_idx = m;
2890         }
2891
2892         if (mode11g_idx < 0)
2893                 return modes; /* 2.4 GHz band not supported at all */
2894
2895         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2896         if (nmodes == NULL)
2897                 return modes; /* Could not add 802.11b mode */
2898
2899         mode = &nmodes[*num_modes];
2900         os_memset(mode, 0, sizeof(*mode));
2901         (*num_modes)++;
2902         modes = nmodes;
2903
2904         mode->mode = HOSTAPD_MODE_IEEE80211B;
2905
2906         mode11g = &modes[mode11g_idx];
2907         mode->num_channels = mode11g->num_channels;
2908         mode->channels = os_malloc(mode11g->num_channels *
2909                                    sizeof(struct hostapd_channel_data));
2910         if (mode->channels == NULL) {
2911                 (*num_modes)--;
2912                 return modes; /* Could not add 802.11b mode */
2913         }
2914         os_memcpy(mode->channels, mode11g->channels,
2915                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2916
2917         mode->num_rates = 0;
2918         mode->rates = os_malloc(4 * sizeof(int));
2919         if (mode->rates == NULL) {
2920                 os_free(mode->channels);
2921                 (*num_modes)--;
2922                 return modes; /* Could not add 802.11b mode */
2923         }
2924
2925         for (i = 0; i < mode11g->num_rates; i++) {
2926                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2927                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2928                         continue;
2929                 mode->rates[mode->num_rates] = mode11g->rates[i];
2930                 mode->num_rates++;
2931                 if (mode->num_rates == 4)
2932                         break;
2933         }
2934
2935         if (mode->num_rates == 0) {
2936                 os_free(mode->channels);
2937                 os_free(mode->rates);
2938                 (*num_modes)--;
2939                 return modes; /* No 802.11b rates */
2940         }
2941
2942         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2943                    "information");
2944
2945         return modes;
2946 }
2947
2948
2949 static struct hostapd_hw_modes *
2950 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2951 {
2952         struct i802_bss *bss = priv;
2953         struct wpa_driver_nl80211_data *drv = bss->drv;
2954         struct nl_msg *msg;
2955         struct phy_info_arg result = {
2956                 .num_modes = num_modes,
2957                 .modes = NULL,
2958         };
2959
2960         *num_modes = 0;
2961         *flags = 0;
2962
2963         msg = nlmsg_alloc();
2964         if (!msg)
2965                 return NULL;
2966
2967         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2968                     0, NL80211_CMD_GET_WIPHY, 0);
2969
2970         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2971
2972         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2973                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2974  nla_put_failure:
2975         return NULL;
2976 }
2977
2978
2979 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2980                                          const void *data, size_t len,
2981                                          int encrypt)
2982 {
2983         __u8 rtap_hdr[] = {
2984                 0x00, 0x00, /* radiotap version */
2985                 0x0e, 0x00, /* radiotap length */
2986                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2987                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2988                 0x00,       /* padding */
2989                 0x00, 0x00, /* RX and TX flags to indicate that */
2990                 0x00, 0x00, /* this is the injected frame directly */
2991         };
2992         struct iovec iov[2] = {
2993                 {
2994                         .iov_base = &rtap_hdr,
2995                         .iov_len = sizeof(rtap_hdr),
2996                 },
2997                 {
2998                         .iov_base = (void *) data,
2999                         .iov_len = len,
3000                 }
3001         };
3002         struct msghdr msg = {
3003                 .msg_name = NULL,
3004                 .msg_namelen = 0,
3005                 .msg_iov = iov,
3006                 .msg_iovlen = 2,
3007                 .msg_control = NULL,
3008                 .msg_controllen = 0,
3009                 .msg_flags = 0,
3010         };
3011
3012         if (encrypt)
3013                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
3014
3015         return sendmsg(drv->monitor_sock, &msg, 0);
3016 }
3017
3018
3019 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
3020                                         size_t data_len)
3021 {
3022         struct i802_bss *bss = priv;
3023         struct wpa_driver_nl80211_data *drv = bss->drv;
3024         struct ieee80211_mgmt *mgmt;
3025         int encrypt = 1;
3026         u16 fc;
3027
3028         mgmt = (struct ieee80211_mgmt *) data;
3029         fc = le_to_host16(mgmt->frame_control);
3030
3031         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
3032             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
3033                 /*
3034                  * Only one of the authentication frame types is encrypted.
3035                  * In order for static WEP encryption to work properly (i.e.,
3036                  * to not encrypt the frame), we need to tell mac80211 about
3037                  * the frames that must not be encrypted.
3038                  */
3039                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
3040                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
3041                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
3042                         encrypt = 0;
3043         }
3044
3045         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
3046 }
3047
3048
3049 static int wpa_driver_nl80211_set_beacon(void *priv,
3050                                          const u8 *head, size_t head_len,
3051                                          const u8 *tail, size_t tail_len,
3052                                          int dtim_period, int beacon_int)
3053 {
3054         struct i802_bss *bss = priv;
3055         struct wpa_driver_nl80211_data *drv = bss->drv;
3056         struct nl_msg *msg;
3057         u8 cmd = NL80211_CMD_NEW_BEACON;
3058         int ret;
3059         int beacon_set;
3060         int ifindex = if_nametoindex(bss->ifname);
3061
3062         beacon_set = bss->beacon_set;
3063
3064         msg = nlmsg_alloc();
3065         if (!msg)
3066                 return -ENOMEM;
3067
3068         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
3069                    beacon_set);
3070         if (beacon_set)
3071                 cmd = NL80211_CMD_SET_BEACON;
3072
3073         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3074                     0, cmd, 0);
3075         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
3076         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
3077         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3078         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
3079         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
3080
3081         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3082         if (ret) {
3083                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
3084                            ret, strerror(-ret));
3085         } else {
3086                 bss->beacon_set = 1;
3087         }
3088         return ret;
3089  nla_put_failure:
3090         return -ENOBUFS;
3091 }
3092
3093
3094 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
3095                                        int freq, int ht_enabled,
3096                                        int sec_channel_offset)
3097 {
3098         struct nl_msg *msg;
3099         int ret;
3100
3101         msg = nlmsg_alloc();
3102         if (!msg)
3103                 return -1;
3104
3105         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3106                     NL80211_CMD_SET_WIPHY, 0);
3107
3108         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3109         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
3110         if (ht_enabled) {
3111                 switch (sec_channel_offset) {
3112                 case -1:
3113                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3114                                     NL80211_CHAN_HT40MINUS);
3115                         break;
3116                 case 1:
3117                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3118                                     NL80211_CHAN_HT40PLUS);
3119                         break;
3120                 default:
3121                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3122                                     NL80211_CHAN_HT20);
3123                         break;
3124                 }
3125         }
3126
3127         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3128         if (ret == 0)
3129                 return 0;
3130         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
3131                    "%d (%s)", freq, ret, strerror(-ret));
3132 nla_put_failure:
3133         return -1;
3134 }
3135
3136
3137 static int wpa_driver_nl80211_sta_add(void *priv,
3138                                       struct hostapd_sta_add_params *params)
3139 {
3140         struct i802_bss *bss = priv;
3141         struct wpa_driver_nl80211_data *drv = bss->drv;
3142         struct nl_msg *msg;
3143         int ret = -ENOBUFS;
3144
3145         msg = nlmsg_alloc();
3146         if (!msg)
3147                 return -ENOMEM;
3148
3149         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3150                     0, NL80211_CMD_NEW_STATION, 0);
3151
3152         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
3153         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3154         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3155         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3156                 params->supp_rates);
3157         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3158                     params->listen_interval);
3159         if (params->ht_capabilities) {
3160                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3161                         sizeof(*params->ht_capabilities),
3162                         params->ht_capabilities);
3163         }
3164
3165         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3166         if (ret)
3167                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3168                            "result: %d (%s)", ret, strerror(-ret));
3169         if (ret == -EEXIST)
3170                 ret = 0;
3171  nla_put_failure:
3172         return ret;
3173 }
3174
3175
3176 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
3177 {
3178         struct i802_bss *bss = priv;
3179         struct wpa_driver_nl80211_data *drv = bss->drv;
3180         struct nl_msg *msg;
3181         int ret;
3182
3183         msg = nlmsg_alloc();
3184         if (!msg)
3185                 return -ENOMEM;
3186
3187         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3188                     0, NL80211_CMD_DEL_STATION, 0);
3189
3190         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3191                     if_nametoindex(bss->ifname));
3192         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3193
3194         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3195         if (ret == -ENOENT)
3196                 return 0;
3197         return ret;
3198  nla_put_failure:
3199         return -ENOBUFS;
3200 }
3201
3202
3203 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
3204                                  int ifidx)
3205 {
3206         struct nl_msg *msg;
3207
3208         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
3209
3210 #ifdef HOSTAPD
3211         /* stop listening for EAPOL on this interface */
3212         del_ifidx(drv, ifidx);
3213 #endif /* HOSTAPD */
3214
3215         msg = nlmsg_alloc();
3216         if (!msg)
3217                 goto nla_put_failure;
3218
3219         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3220                     0, NL80211_CMD_DEL_INTERFACE, 0);
3221         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
3222
3223         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3224                 return;
3225  nla_put_failure:
3226         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
3227 }
3228
3229
3230 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
3231                                      const char *ifname,
3232                                      enum nl80211_iftype iftype,
3233                                      const u8 *addr, int wds)
3234 {
3235         struct nl_msg *msg, *flags = NULL;
3236         int ifidx;
3237         int ret = -ENOBUFS;
3238
3239         msg = nlmsg_alloc();
3240         if (!msg)
3241                 return -1;
3242
3243         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3244                     0, NL80211_CMD_NEW_INTERFACE, 0);
3245         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3246         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
3247         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
3248
3249         if (iftype == NL80211_IFTYPE_MONITOR) {
3250                 int err;
3251
3252                 flags = nlmsg_alloc();
3253                 if (!flags)
3254                         goto nla_put_failure;
3255
3256                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
3257
3258                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
3259
3260                 nlmsg_free(flags);
3261
3262                 if (err)
3263                         goto nla_put_failure;
3264         } else if (wds) {
3265                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
3266         }
3267
3268         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3269         if (ret) {
3270  nla_put_failure:
3271                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
3272                            ifname, ret, strerror(-ret));
3273                 return ret;
3274         }
3275
3276         ifidx = if_nametoindex(ifname);
3277         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
3278                    ifname, ifidx);
3279
3280         if (ifidx <= 0)
3281                 return -1;
3282
3283 #ifdef HOSTAPD
3284         /* start listening for EAPOL on this interface */
3285         add_ifidx(drv, ifidx);
3286 #endif /* HOSTAPD */
3287
3288         if (addr && iftype != NL80211_IFTYPE_MONITOR &&
3289             linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
3290                 nl80211_remove_iface(drv, ifidx);
3291                 return -1;
3292         }
3293
3294         return ifidx;
3295 }
3296
3297
3298 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
3299                                 const char *ifname, enum nl80211_iftype iftype,
3300                                 const u8 *addr, int wds)
3301 {
3302         int ret;
3303
3304         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
3305
3306         /* if error occured and interface exists already */
3307         if (ret == -ENFILE && if_nametoindex(ifname)) {
3308                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
3309
3310                 /* Try to remove the interface that was already there. */
3311                 nl80211_remove_iface(drv, if_nametoindex(ifname));
3312
3313                 /* Try to create the interface again */
3314                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
3315                                                 wds);
3316         }
3317
3318         if (ret >= 0 && drv->disable_11b_rates)
3319                 nl80211_disable_11b_rates(drv, ret, 1);
3320
3321         return ret;
3322 }
3323
3324
3325 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
3326 {
3327         struct ieee80211_hdr *hdr;
3328         u16 fc;
3329         union wpa_event_data event;
3330
3331         hdr = (struct ieee80211_hdr *) buf;
3332         fc = le_to_host16(hdr->frame_control);
3333
3334         os_memset(&event, 0, sizeof(event));
3335         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
3336         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
3337         event.tx_status.dst = hdr->addr1;
3338         event.tx_status.data = buf;
3339         event.tx_status.data_len = len;
3340         event.tx_status.ack = ok;
3341         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
3342 }
3343
3344
3345 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
3346                              u8 *buf, size_t len)
3347 {
3348         union wpa_event_data event;
3349         os_memset(&event, 0, sizeof(event));
3350         event.rx_from_unknown.frame = buf;
3351         event.rx_from_unknown.len = len;
3352         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
3353 }
3354
3355
3356 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3357                          u8 *buf, size_t len, int datarate, int ssi_signal)
3358 {
3359         struct ieee80211_hdr *hdr;
3360         u16 fc;
3361         union wpa_event_data event;
3362
3363         hdr = (struct ieee80211_hdr *) buf;
3364         fc = le_to_host16(hdr->frame_control);
3365
3366         switch (WLAN_FC_GET_TYPE(fc)) {
3367         case WLAN_FC_TYPE_MGMT:
3368                 os_memset(&event, 0, sizeof(event));
3369                 event.rx_mgmt.frame = buf;
3370                 event.rx_mgmt.frame_len = len;
3371                 event.rx_mgmt.datarate = datarate;
3372                 event.rx_mgmt.ssi_signal = ssi_signal;
3373                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
3374                 break;
3375         case WLAN_FC_TYPE_CTRL:
3376                 /* can only get here with PS-Poll frames */
3377                 wpa_printf(MSG_DEBUG, "CTRL");
3378                 from_unknown_sta(drv, buf, len);
3379                 break;
3380         case WLAN_FC_TYPE_DATA:
3381                 from_unknown_sta(drv, buf, len);
3382                 break;
3383         }
3384 }
3385
3386
3387 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
3388 {
3389         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3390         int len;
3391         unsigned char buf[3000];
3392         struct ieee80211_radiotap_iterator iter;
3393         int ret;
3394         int datarate = 0, ssi_signal = 0;
3395         int injected = 0, failed = 0, rxflags = 0;
3396
3397         len = recv(sock, buf, sizeof(buf), 0);
3398         if (len < 0) {
3399                 perror("recv");
3400                 return;
3401         }
3402
3403         if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
3404                 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
3405                            "frame since Probe Request reporting is disabled");
3406                 return;
3407         }
3408
3409         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
3410                 printf("received invalid radiotap frame\n");
3411                 return;
3412         }
3413
3414         while (1) {
3415                 ret = ieee80211_radiotap_iterator_next(&iter);
3416                 if (ret == -ENOENT)
3417                         break;
3418                 if (ret) {
3419                         printf("received invalid radiotap frame (%d)\n", ret);
3420                         return;
3421                 }
3422                 switch (iter.this_arg_index) {
3423                 case IEEE80211_RADIOTAP_FLAGS:
3424                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
3425                                 len -= 4;
3426                         break;
3427                 case IEEE80211_RADIOTAP_RX_FLAGS:
3428                         rxflags = 1;
3429                         break;
3430                 case IEEE80211_RADIOTAP_TX_FLAGS:
3431                         injected = 1;
3432                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3433                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3434                         break;
3435                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3436                         break;
3437                 case IEEE80211_RADIOTAP_CHANNEL:
3438                         /* TODO: convert from freq/flags to channel number */
3439                         break;
3440                 case IEEE80211_RADIOTAP_RATE:
3441                         datarate = *iter.this_arg * 5;
3442                         break;
3443                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3444                         ssi_signal = *iter.this_arg;
3445                         break;
3446                 }
3447         }
3448
3449         if (rxflags && injected)
3450                 return;
3451
3452         if (!injected)
3453                 handle_frame(drv, buf + iter.max_length,
3454                              len - iter.max_length, datarate, ssi_signal);
3455         else
3456                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3457                                    len - iter.max_length, !failed);
3458 }
3459
3460
3461 /*
3462  * we post-process the filter code later and rewrite
3463  * this to the offset to the last instruction
3464  */
3465 #define PASS    0xFF
3466 #define FAIL    0xFE
3467
3468 static struct sock_filter msock_filter_insns[] = {
3469         /*
3470          * do a little-endian load of the radiotap length field
3471          */
3472         /* load lower byte into A */
3473         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3474         /* put it into X (== index register) */
3475         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3476         /* load upper byte into A */
3477         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3478         /* left-shift it by 8 */
3479         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3480         /* or with X */
3481         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3482         /* put result into X */
3483         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3484
3485         /*
3486          * Allow management frames through, this also gives us those
3487          * management frames that we sent ourselves with status
3488          */
3489         /* load the lower byte of the IEEE 802.11 frame control field */
3490         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3491         /* mask off frame type and version */
3492         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3493         /* accept frame if it's both 0, fall through otherwise */
3494         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3495
3496         /*
3497          * TODO: add a bit to radiotap RX flags that indicates
3498          * that the sending station is not associated, then
3499          * add a filter here that filters on our DA and that flag
3500          * to allow us to deauth frames to that bad station.
3501          *
3502          * Not a regression -- we didn't do it before either.
3503          */
3504
3505 #if 0
3506         /*
3507          * drop non-data frames
3508          */
3509         /* load the lower byte of the frame control field */
3510         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3511         /* mask off QoS bit */
3512         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3513         /* drop non-data frames */
3514         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3515 #endif
3516         /* load the upper byte of the frame control field */
3517         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
3518         /* mask off toDS/fromDS */
3519         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3520         /* accept WDS frames */
3521         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
3522
3523         /*
3524          * add header length to index
3525          */
3526         /* load the lower byte of the frame control field */
3527         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3528         /* mask off QoS bit */
3529         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3530         /* right shift it by 6 to give 0 or 2 */
3531         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3532         /* add data frame header length */
3533         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3534         /* add index, was start of 802.11 header */
3535         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3536         /* move to index, now start of LL header */
3537         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3538
3539         /*
3540          * Accept empty data frames, we use those for
3541          * polling activity.
3542          */
3543         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3544         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3545
3546         /*
3547          * Accept EAPOL frames
3548          */
3549         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3550         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3551         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3552         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3553
3554         /* keep these last two statements or change the code below */
3555         /* return 0 == "DROP" */
3556         BPF_STMT(BPF_RET | BPF_K, 0),
3557         /* return ~0 == "keep all" */
3558         BPF_STMT(BPF_RET | BPF_K, ~0),
3559 };
3560
3561 static struct sock_fprog msock_filter = {
3562         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3563         .filter = msock_filter_insns,
3564 };
3565
3566
3567 static int add_monitor_filter(int s)
3568 {
3569         int idx;
3570
3571         /* rewrite all PASS/FAIL jump offsets */
3572         for (idx = 0; idx < msock_filter.len; idx++) {
3573                 struct sock_filter *insn = &msock_filter_insns[idx];
3574
3575                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3576                         if (insn->code == (BPF_JMP|BPF_JA)) {
3577                                 if (insn->k == PASS)
3578                                         insn->k = msock_filter.len - idx - 2;
3579                                 else if (insn->k == FAIL)
3580                                         insn->k = msock_filter.len - idx - 3;
3581                         }
3582
3583                         if (insn->jt == PASS)
3584                                 insn->jt = msock_filter.len - idx - 2;
3585                         else if (insn->jt == FAIL)
3586                                 insn->jt = msock_filter.len - idx - 3;
3587
3588                         if (insn->jf == PASS)
3589                                 insn->jf = msock_filter.len - idx - 2;
3590                         else if (insn->jf == FAIL)
3591                                 insn->jf = msock_filter.len - idx - 3;
3592                 }
3593         }
3594
3595         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3596                        &msock_filter, sizeof(msock_filter))) {
3597                 perror("SO_ATTACH_FILTER");
3598                 return -1;
3599         }
3600
3601         return 0;
3602 }
3603
3604
3605 static void nl80211_remove_monitor_interface(
3606         struct wpa_driver_nl80211_data *drv)
3607 {
3608         if (drv->monitor_ifidx >= 0) {
3609                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3610                 drv->monitor_ifidx = -1;
3611         }
3612         if (drv->monitor_sock >= 0) {
3613                 eloop_unregister_read_sock(drv->monitor_sock);
3614                 close(drv->monitor_sock);
3615                 drv->monitor_sock = -1;
3616         }
3617 }
3618
3619
3620 static int
3621 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3622 {
3623         char buf[IFNAMSIZ];
3624         struct sockaddr_ll ll;
3625         int optval;
3626         socklen_t optlen;
3627
3628         snprintf(buf, IFNAMSIZ, "mon.%s", drv->first_bss.ifname);
3629         buf[IFNAMSIZ - 1] = '\0';
3630
3631         drv->monitor_ifidx =
3632                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3633                                      0);
3634
3635         if (drv->monitor_ifidx < 0)
3636                 return -1;
3637
3638         if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3639                 goto error;
3640
3641         memset(&ll, 0, sizeof(ll));
3642         ll.sll_family = AF_PACKET;
3643         ll.sll_ifindex = drv->monitor_ifidx;
3644         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3645         if (drv->monitor_sock < 0) {
3646                 perror("socket[PF_PACKET,SOCK_RAW]");
3647                 goto error;
3648         }
3649
3650         if (add_monitor_filter(drv->monitor_sock)) {
3651                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3652                            "interface; do filtering in user space");
3653                 /* This works, but will cost in performance. */
3654         }
3655
3656         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3657                 perror("monitor socket bind");
3658                 goto error;
3659         }
3660
3661         optlen = sizeof(optval);
3662         optval = 20;
3663         if (setsockopt
3664             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3665                 perror("Failed to set socket priority");
3666                 goto error;
3667         }
3668
3669         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3670                                      drv, NULL)) {
3671                 printf("Could not register monitor read socket\n");
3672                 goto error;
3673         }
3674
3675         return 0;
3676  error:
3677         nl80211_remove_monitor_interface(drv);
3678         return -1;
3679 }
3680
3681
3682 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3683
3684 static int wpa_driver_nl80211_hapd_send_eapol(
3685         void *priv, const u8 *addr, const u8 *data,
3686         size_t data_len, int encrypt, const u8 *own_addr)
3687 {
3688         struct i802_bss *bss = priv;
3689         struct wpa_driver_nl80211_data *drv = bss->drv;
3690         struct ieee80211_hdr *hdr;
3691         size_t len;
3692         u8 *pos;
3693         int res;
3694 #if 0 /* FIX */
3695         int qos = sta->flags & WPA_STA_WMM;
3696 #else
3697         int qos = 0;
3698 #endif
3699
3700         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3701                 data_len;
3702         hdr = os_zalloc(len);
3703         if (hdr == NULL) {
3704                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3705                        (unsigned long) len);
3706                 return -1;
3707         }
3708
3709         hdr->frame_control =
3710                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3711         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3712         if (encrypt)
3713                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3714 #if 0 /* To be enabled if qos determination is added above */
3715         if (qos) {
3716                 hdr->frame_control |=
3717                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3718         }
3719 #endif
3720
3721         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3722         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3723         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3724         pos = (u8 *) (hdr + 1);
3725
3726 #if 0 /* To be enabled if qos determination is added above */
3727         if (qos) {
3728                 /* add an empty QoS header if needed */
3729                 pos[0] = 0;
3730                 pos[1] = 0;
3731                 pos += 2;
3732         }
3733 #endif
3734
3735         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3736         pos += sizeof(rfc1042_header);
3737         WPA_PUT_BE16(pos, ETH_P_PAE);
3738         pos += 2;
3739         memcpy(pos, data, data_len);
3740
3741         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3742         if (res < 0) {
3743                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3744                            "failed: %d (%s)",
3745                            (unsigned long) len, errno, strerror(errno));
3746         }
3747         os_free(hdr);
3748
3749         return res;
3750 }
3751
3752
3753 static u32 sta_flags_nl80211(int flags)
3754 {
3755         u32 f = 0;
3756
3757         if (flags & WPA_STA_AUTHORIZED)
3758                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3759         if (flags & WPA_STA_WMM)
3760                 f |= BIT(NL80211_STA_FLAG_WME);
3761         if (flags & WPA_STA_SHORT_PREAMBLE)
3762                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3763         if (flags & WPA_STA_MFP)
3764                 f |= BIT(NL80211_STA_FLAG_MFP);
3765
3766         return f;
3767 }
3768
3769
3770 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3771                                             int total_flags,
3772                                             int flags_or, int flags_and)
3773 {
3774         struct i802_bss *bss = priv;
3775         struct wpa_driver_nl80211_data *drv = bss->drv;
3776         struct nl_msg *msg, *flags = NULL;
3777         struct nl80211_sta_flag_update upd;
3778
3779         msg = nlmsg_alloc();
3780         if (!msg)
3781                 return -ENOMEM;
3782
3783         flags = nlmsg_alloc();
3784         if (!flags) {
3785                 nlmsg_free(msg);
3786                 return -ENOMEM;
3787         }
3788
3789         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3790                     0, NL80211_CMD_SET_STATION, 0);
3791
3792         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3793                     if_nametoindex(bss->ifname));
3794         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3795
3796         /*
3797          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3798          * can be removed eventually.
3799          */
3800         if (total_flags & WPA_STA_AUTHORIZED)
3801                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3802
3803         if (total_flags & WPA_STA_WMM)
3804                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3805
3806         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3807                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3808
3809         if (total_flags & WPA_STA_MFP)
3810                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3811
3812         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3813                 goto nla_put_failure;
3814
3815         os_memset(&upd, 0, sizeof(upd));
3816         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3817         upd.set = sta_flags_nl80211(flags_or);
3818         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3819
3820         nlmsg_free(flags);
3821
3822         return send_and_recv_msgs(drv, msg, NULL, NULL);
3823  nla_put_failure:
3824         nlmsg_free(flags);
3825         return -ENOBUFS;
3826 }
3827
3828
3829 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3830                                  struct wpa_driver_associate_params *params)
3831 {
3832         if (params->p2p)
3833                 wpa_printf(MSG_DEBUG, "nl80211: Setup AP operations for P2P "
3834                            "group (GO)");
3835         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode) ||
3836             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3837                 nl80211_remove_monitor_interface(drv);
3838                 return -1;
3839         }
3840
3841         /* TODO: setup monitor interface (and add code somewhere to remove this
3842          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3843
3844         return 0;
3845 }
3846
3847
3848 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3849 {
3850         struct nl_msg *msg;
3851         int ret = -1;
3852
3853         msg = nlmsg_alloc();
3854         if (!msg)
3855                 return -1;
3856
3857         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3858                     NL80211_CMD_LEAVE_IBSS, 0);
3859         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3860         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3861         msg = NULL;
3862         if (ret) {
3863                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3864                            "(%s)", ret, strerror(-ret));
3865                 goto nla_put_failure;
3866         }
3867
3868         ret = 0;
3869         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3870
3871 nla_put_failure:
3872         nlmsg_free(msg);
3873         return ret;
3874 }
3875
3876
3877 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3878                                    struct wpa_driver_associate_params *params)
3879 {
3880         struct nl_msg *msg;
3881         int ret = -1;
3882         int count = 0;
3883
3884         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3885
3886         if (wpa_driver_nl80211_set_mode(&drv->first_bss, params->mode)) {
3887                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3888                            "IBSS mode");
3889                 return -1;
3890         }
3891
3892 retry:
3893         msg = nlmsg_alloc();
3894         if (!msg)
3895                 return -1;
3896
3897         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3898                     NL80211_CMD_JOIN_IBSS, 0);
3899         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3900
3901         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3902                 goto nla_put_failure;
3903
3904         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3905                           params->ssid, params->ssid_len);
3906         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3907                 params->ssid);
3908         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3909         drv->ssid_len = params->ssid_len;
3910
3911         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3912         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3913
3914         ret = nl80211_set_conn_keys(params, msg);
3915         if (ret)
3916                 goto nla_put_failure;
3917
3918         if (params->wpa_ie) {
3919                 wpa_hexdump(MSG_DEBUG,
3920                             "  * Extra IEs for Beacon/Probe Response frames",
3921                             params->wpa_ie, params->wpa_ie_len);
3922                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3923                         params->wpa_ie);
3924         }
3925
3926         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3927         msg = NULL;
3928         if (ret) {
3929                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3930                            ret, strerror(-ret));
3931                 count++;
3932                 if (ret == -EALREADY && count == 1) {
3933                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3934                                    "forced leave");
3935                         nl80211_leave_ibss(drv);
3936                         nlmsg_free(msg);
3937                         goto retry;
3938                 }
3939
3940                 goto nla_put_failure;
3941         }
3942         ret = 0;
3943         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3944
3945 nla_put_failure:
3946         nlmsg_free(msg);
3947         return ret;
3948 }
3949
3950
3951 static int wpa_driver_nl80211_connect(
3952         struct wpa_driver_nl80211_data *drv,
3953         struct wpa_driver_associate_params *params)
3954 {
3955         struct nl_msg *msg;
3956         enum nl80211_auth_type type;
3957         int ret = 0;
3958
3959         msg = nlmsg_alloc();
3960         if (!msg)
3961                 return -1;
3962
3963         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3964         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3965                     NL80211_CMD_CONNECT, 0);
3966
3967         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3968         if (params->bssid) {
3969                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3970                            MAC2STR(params->bssid));
3971                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3972         }
3973         if (params->freq) {
3974                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3975                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3976         }
3977         if (params->ssid) {
3978                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3979                                   params->ssid, params->ssid_len);
3980                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3981                         params->ssid);
3982                 if (params->ssid_len > sizeof(drv->ssid))
3983                         goto nla_put_failure;
3984                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3985                 drv->ssid_len = params->ssid_len;
3986         }
3987         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3988         if (params->wpa_ie)
3989                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3990                         params->wpa_ie);
3991
3992         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3993                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3994         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3995                 type = NL80211_AUTHTYPE_SHARED_KEY;
3996         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3997                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3998         else if (params->auth_alg & WPA_AUTH_ALG_FT)
3999                 type = NL80211_AUTHTYPE_FT;
4000         else
4001                 goto nla_put_failure;
4002
4003         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
4004         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
4005
4006         if (params->wpa_ie && params->wpa_ie_len) {
4007                 enum nl80211_wpa_versions ver;
4008
4009                 if (params->wpa_ie[0] == WLAN_EID_RSN)
4010                         ver = NL80211_WPA_VERSION_2;
4011                 else
4012                         ver = NL80211_WPA_VERSION_1;
4013
4014                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
4015                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
4016         }
4017
4018         if (params->pairwise_suite != CIPHER_NONE) {
4019                 int cipher;
4020
4021                 switch (params->pairwise_suite) {
4022                 case CIPHER_WEP40:
4023                         cipher = WLAN_CIPHER_SUITE_WEP40;
4024                         break;
4025                 case CIPHER_WEP104:
4026                         cipher = WLAN_CIPHER_SUITE_WEP104;
4027                         break;
4028                 case CIPHER_CCMP:
4029                         cipher = WLAN_CIPHER_SUITE_CCMP;
4030                         break;
4031                 case CIPHER_TKIP:
4032                 default:
4033                         cipher = WLAN_CIPHER_SUITE_TKIP;
4034                         break;
4035                 }
4036                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
4037         }
4038
4039         if (params->group_suite != CIPHER_NONE) {
4040                 int cipher;
4041
4042                 switch (params->group_suite) {
4043                 case CIPHER_WEP40:
4044                         cipher = WLAN_CIPHER_SUITE_WEP40;
4045                         break;
4046                 case CIPHER_WEP104:
4047                         cipher = WLAN_CIPHER_SUITE_WEP104;
4048                         break;
4049                 case CIPHER_CCMP:
4050                         cipher = WLAN_CIPHER_SUITE_CCMP;
4051                         break;
4052                 case CIPHER_TKIP:
4053                 default:
4054                         cipher = WLAN_CIPHER_SUITE_TKIP;
4055                         break;
4056                 }
4057                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
4058         }
4059
4060         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
4061             params->key_mgmt_suite == KEY_MGMT_PSK) {
4062                 int mgmt = WLAN_AKM_SUITE_PSK;
4063
4064                 switch (params->key_mgmt_suite) {
4065                 case KEY_MGMT_802_1X:
4066                         mgmt = WLAN_AKM_SUITE_8021X;
4067                         break;
4068                 case KEY_MGMT_PSK:
4069                 default:
4070                         mgmt = WLAN_AKM_SUITE_PSK;
4071                         break;
4072                 }
4073                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
4074         }
4075
4076         ret = nl80211_set_conn_keys(params, msg);
4077         if (ret)
4078                 goto nla_put_failure;
4079
4080         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4081         msg = NULL;
4082         if (ret) {
4083                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
4084                            "(%s)", ret, strerror(-ret));
4085                 goto nla_put_failure;
4086         }
4087         ret = 0;
4088         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
4089
4090 nla_put_failure:
4091         nlmsg_free(msg);
4092         return ret;
4093
4094 }
4095
4096
4097 static int wpa_driver_nl80211_associate(
4098         void *priv, struct wpa_driver_associate_params *params)
4099 {
4100         struct i802_bss *bss = priv;
4101         struct wpa_driver_nl80211_data *drv = bss->drv;
4102         int ret = -1;
4103         struct nl_msg *msg;
4104
4105         if (params->mode == IEEE80211_MODE_AP)
4106                 return wpa_driver_nl80211_ap(drv, params);
4107
4108         if (params->mode == IEEE80211_MODE_IBSS)
4109                 return wpa_driver_nl80211_ibss(drv, params);
4110
4111         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
4112                 if (wpa_driver_nl80211_set_mode(priv, params->mode) < 0)
4113                         return -1;
4114                 return wpa_driver_nl80211_connect(drv, params);
4115         }
4116
4117         drv->associated = 0;
4118
4119         msg = nlmsg_alloc();
4120         if (!msg)
4121                 return -1;
4122
4123         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
4124                    drv->ifindex);
4125         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4126                     NL80211_CMD_ASSOCIATE, 0);
4127
4128         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4129         if (params->bssid) {
4130                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
4131                            MAC2STR(params->bssid));
4132                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
4133         }
4134         if (params->freq) {
4135                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
4136                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
4137                 drv->assoc_freq = params->freq;
4138         } else
4139                 drv->assoc_freq = 0;
4140         if (params->ssid) {
4141                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
4142                                   params->ssid, params->ssid_len);
4143                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
4144                         params->ssid);
4145                 if (params->ssid_len > sizeof(drv->ssid))
4146                         goto nla_put_failure;
4147                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
4148                 drv->ssid_len = params->ssid_len;
4149         }
4150         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
4151         if (params->wpa_ie)
4152                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
4153                         params->wpa_ie);
4154
4155 #ifdef CONFIG_IEEE80211W
4156         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
4157                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
4158 #endif /* CONFIG_IEEE80211W */
4159
4160         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
4161
4162         if (params->prev_bssid) {
4163                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
4164                            MAC2STR(params->prev_bssid));
4165                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
4166                         params->prev_bssid);
4167         }
4168
4169         if (params->p2p)
4170                 wpa_printf(MSG_DEBUG, "  * P2P group");
4171
4172         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4173         msg = NULL;
4174         if (ret) {
4175                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
4176                            "(%s)", ret, strerror(-ret));
4177                 nl80211_dump_scan(drv);
4178                 goto nla_put_failure;
4179         }
4180         ret = 0;
4181         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
4182                    "successfully");
4183
4184 nla_put_failure:
4185         nlmsg_free(msg);
4186         return ret;
4187 }
4188
4189
4190 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
4191                             int ifindex, int mode)
4192 {
4193         struct nl_msg *msg;
4194         int ret = -ENOBUFS;
4195
4196         msg = nlmsg_alloc();
4197         if (!msg)
4198                 return -ENOMEM;
4199
4200         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4201                     0, NL80211_CMD_SET_INTERFACE, 0);
4202         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
4203         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
4204
4205         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4206         if (!ret)
4207                 return 0;
4208 nla_put_failure:
4209         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
4210                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
4211         return ret;
4212 }
4213
4214
4215 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
4216 {
4217         struct i802_bss *bss = priv;
4218         struct wpa_driver_nl80211_data *drv = bss->drv;
4219         int ret = -1;
4220         int nlmode;
4221         int i;
4222
4223         switch (mode) {
4224         case 0:
4225                 nlmode = NL80211_IFTYPE_STATION;
4226                 break;
4227         case 1:
4228                 nlmode = NL80211_IFTYPE_ADHOC;
4229                 break;
4230         case 2:
4231                 nlmode = NL80211_IFTYPE_AP;
4232                 break;
4233         default:
4234                 return -1;
4235         }
4236
4237         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
4238                 drv->nlmode = nlmode;
4239                 ret = 0;
4240                 goto done;
4241         }
4242
4243         if (nlmode == drv->nlmode) {
4244                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
4245                            "requested mode - ignore error");
4246                 ret = 0;
4247                 goto done; /* Already in the requested mode */
4248         }
4249
4250         /* mac80211 doesn't allow mode changes while the device is up, so
4251          * take the device down, try to set the mode again, and bring the
4252          * device back up.
4253          */
4254         wpa_printf(MSG_DEBUG, "nl80211: Try mode change after setting "
4255                    "interface down");
4256         for (i = 0; i < 10; i++) {
4257                 if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0) ==
4258                     0) {
4259                         /* Try to set the mode again while the interface is
4260                          * down */
4261                         ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
4262                         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname,
4263                                                   1))
4264                                 ret = -1;
4265                         if (!ret)
4266                                 break;
4267                 } else
4268                         wpa_printf(MSG_DEBUG, "nl80211: Failed to set "
4269                                    "interface down");
4270                 os_sleep(0, 100000);
4271         }
4272
4273         if (!ret) {
4274                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
4275                            "interface is down");
4276                 drv->nlmode = nlmode;
4277         }
4278
4279 done:
4280         if (!ret && nlmode == NL80211_IFTYPE_AP) {
4281                 /* Setup additional AP mode functionality if needed */
4282                 if (drv->monitor_ifidx < 0 &&
4283                     nl80211_create_monitor_interface(drv))
4284                         return -1;
4285         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
4286                 /* Remove additional AP mode functionality */
4287                 nl80211_remove_monitor_interface(drv);
4288                 bss->beacon_set = 0;
4289         }
4290
4291         if (ret)
4292                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
4293                            "from %d failed", nlmode, drv->nlmode);
4294
4295         return ret;
4296 }
4297
4298
4299 static int wpa_driver_nl80211_get_capa(void *priv,
4300                                        struct wpa_driver_capa *capa)
4301 {
4302         struct i802_bss *bss = priv;
4303         struct wpa_driver_nl80211_data *drv = bss->drv;
4304         if (!drv->has_capability)
4305                 return -1;
4306         os_memcpy(capa, &drv->capa, sizeof(*capa));
4307         return 0;
4308 }
4309
4310
4311 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
4312 {
4313         struct i802_bss *bss = priv;
4314         struct wpa_driver_nl80211_data *drv = bss->drv;
4315
4316         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
4317                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
4318         drv->operstate = state;
4319         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
4320                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
4321 }
4322
4323
4324 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
4325 {
4326         struct i802_bss *bss = priv;
4327         struct wpa_driver_nl80211_data *drv = bss->drv;
4328         struct nl_msg *msg;
4329         struct nl80211_sta_flag_update upd;
4330
4331         msg = nlmsg_alloc();
4332         if (!msg)
4333                 return -ENOMEM;
4334
4335         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4336                     0, NL80211_CMD_SET_STATION, 0);
4337
4338         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4339                     if_nametoindex(bss->ifname));
4340         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
4341
4342         os_memset(&upd, 0, sizeof(upd));
4343         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
4344         if (authorized)
4345                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
4346         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
4347
4348         return send_and_recv_msgs(drv, msg, NULL, NULL);
4349  nla_put_failure:
4350         return -ENOBUFS;
4351 }
4352
4353
4354 #ifdef HOSTAPD
4355
4356 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4357 {
4358         int i;
4359         int *old;
4360
4361         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
4362                    ifidx);
4363         for (i = 0; i < drv->num_if_indices; i++) {
4364                 if (drv->if_indices[i] == 0) {
4365                         drv->if_indices[i] = ifidx;
4366                         return;
4367                 }
4368         }
4369
4370         if (drv->if_indices != drv->default_if_indices)
4371                 old = drv->if_indices;
4372         else
4373                 old = NULL;
4374
4375         drv->if_indices = os_realloc(old,
4376                                      sizeof(int) * (drv->num_if_indices + 1));
4377         if (!drv->if_indices) {
4378                 if (!old)
4379                         drv->if_indices = drv->default_if_indices;
4380                 else
4381                         drv->if_indices = old;
4382                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
4383                            "interfaces");
4384                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
4385                 return;
4386         } else if (!old)
4387                 os_memcpy(drv->if_indices, drv->default_if_indices,
4388                           sizeof(drv->default_if_indices));
4389         drv->if_indices[drv->num_if_indices] = ifidx;
4390         drv->num_if_indices++;
4391 }
4392
4393
4394 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4395 {
4396         int i;
4397
4398         for (i = 0; i < drv->num_if_indices; i++) {
4399                 if (drv->if_indices[i] == ifidx) {
4400                         drv->if_indices[i] = 0;
4401                         break;
4402                 }
4403         }
4404 }
4405
4406
4407 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
4408 {
4409         int i;
4410
4411         for (i = 0; i < drv->num_if_indices; i++)
4412                 if (drv->if_indices[i] == ifidx)
4413                         return 1;
4414
4415         return 0;
4416 }
4417
4418
4419 static inline int min_int(int a, int b)
4420 {
4421         if (a < b)
4422                 return a;
4423         return b;
4424 }
4425
4426
4427 static int get_key_handler(struct nl_msg *msg, void *arg)
4428 {
4429         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4430         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4431
4432         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4433                   genlmsg_attrlen(gnlh, 0), NULL);
4434
4435         /*
4436          * TODO: validate the key index and mac address!
4437          * Otherwise, there's a race condition as soon as
4438          * the kernel starts sending key notifications.
4439          */
4440
4441         if (tb[NL80211_ATTR_KEY_SEQ])
4442                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4443                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4444         return NL_SKIP;
4445 }
4446
4447
4448 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4449                            int idx, u8 *seq)
4450 {
4451         struct i802_bss *bss = priv;
4452         struct wpa_driver_nl80211_data *drv = bss->drv;
4453         struct nl_msg *msg;
4454
4455         msg = nlmsg_alloc();
4456         if (!msg)
4457                 return -ENOMEM;
4458
4459         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4460                     0, NL80211_CMD_GET_KEY, 0);
4461
4462         if (addr)
4463                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4464         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4465         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4466
4467         memset(seq, 0, 6);
4468
4469         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4470  nla_put_failure:
4471         return -ENOBUFS;
4472 }
4473
4474
4475 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4476                               int mode)
4477 {
4478         struct i802_bss *bss = priv;
4479         struct wpa_driver_nl80211_data *drv = bss->drv;
4480         struct nl_msg *msg;
4481         u8 rates[NL80211_MAX_SUPP_RATES];
4482         u8 rates_len = 0;
4483         int i;
4484
4485         msg = nlmsg_alloc();
4486         if (!msg)
4487                 return -ENOMEM;
4488
4489         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4490                     NL80211_CMD_SET_BSS, 0);
4491
4492         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4493                 rates[rates_len++] = basic_rates[i] / 5;
4494
4495         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4496
4497         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4498
4499         return send_and_recv_msgs(drv, msg, NULL, NULL);
4500  nla_put_failure:
4501         return -ENOBUFS;
4502 }
4503
4504 #endif /* HOSTAPD */
4505
4506
4507 /* Set kernel driver on given frequency (MHz) */
4508 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4509 {
4510         struct i802_bss *bss = priv;
4511         struct wpa_driver_nl80211_data *drv = bss->drv;
4512         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4513                                            freq->sec_channel_offset);
4514 }
4515
4516
4517 #ifdef HOSTAPD
4518
4519 static int i802_set_rts(void *priv, int rts)
4520 {
4521         struct i802_bss *bss = priv;
4522         struct wpa_driver_nl80211_data *drv = bss->drv;
4523         struct nl_msg *msg;
4524         int ret = -ENOBUFS;
4525         u32 val;
4526
4527         msg = nlmsg_alloc();
4528         if (!msg)
4529                 return -ENOMEM;
4530
4531         if (rts >= 2347)
4532                 val = (u32) -1;
4533         else
4534                 val = rts;
4535
4536         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4537                     0, NL80211_CMD_SET_WIPHY, 0);
4538         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4539         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4540
4541         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4542         if (!ret)
4543                 return 0;
4544 nla_put_failure:
4545         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4546                    "%d (%s)", rts, ret, strerror(-ret));
4547         return ret;
4548 }
4549
4550
4551 static int i802_set_frag(void *priv, int frag)
4552 {
4553         struct i802_bss *bss = priv;
4554         struct wpa_driver_nl80211_data *drv = bss->drv;
4555         struct nl_msg *msg;
4556         int ret = -ENOBUFS;
4557         u32 val;
4558
4559         msg = nlmsg_alloc();
4560         if (!msg)
4561                 return -ENOMEM;
4562
4563         if (frag >= 2346)
4564                 val = (u32) -1;
4565         else
4566                 val = frag;
4567
4568         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4569                     0, NL80211_CMD_SET_WIPHY, 0);
4570         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4571         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4572
4573         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4574         if (!ret)
4575                 return 0;
4576 nla_put_failure:
4577         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4578                    "%d: %d (%s)", frag, ret, strerror(-ret));
4579         return ret;
4580 }
4581
4582
4583 static int i802_flush(void *priv)
4584 {
4585         struct i802_bss *bss = priv;
4586         struct wpa_driver_nl80211_data *drv = bss->drv;
4587         struct nl_msg *msg;
4588
4589         msg = nlmsg_alloc();
4590         if (!msg)
4591                 return -1;
4592
4593         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4594                     0, NL80211_CMD_DEL_STATION, 0);
4595
4596         /*
4597          * XXX: FIX! this needs to flush all VLANs too
4598          */
4599         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4600                     if_nametoindex(bss->ifname));
4601
4602         return send_and_recv_msgs(drv, msg, NULL, NULL);
4603  nla_put_failure:
4604         return -ENOBUFS;
4605 }
4606
4607
4608 static int get_sta_handler(struct nl_msg *msg, void *arg)
4609 {
4610         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4611         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4612         struct hostap_sta_driver_data *data = arg;
4613         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4614         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4615                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4616                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4617                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4618                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4619                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4620         };
4621
4622         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4623                   genlmsg_attrlen(gnlh, 0), NULL);
4624
4625         /*
4626          * TODO: validate the interface and mac address!
4627          * Otherwise, there's a race condition as soon as
4628          * the kernel starts sending station notifications.
4629          */
4630
4631         if (!tb[NL80211_ATTR_STA_INFO]) {
4632                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4633                 return NL_SKIP;
4634         }
4635         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4636                              tb[NL80211_ATTR_STA_INFO],
4637                              stats_policy)) {
4638                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4639                 return NL_SKIP;
4640         }
4641
4642         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4643                 data->inactive_msec =
4644                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4645         if (stats[NL80211_STA_INFO_RX_BYTES])
4646                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4647         if (stats[NL80211_STA_INFO_TX_BYTES])
4648                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4649         if (stats[NL80211_STA_INFO_RX_PACKETS])
4650                 data->rx_packets =
4651                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4652         if (stats[NL80211_STA_INFO_TX_PACKETS])
4653                 data->tx_packets =
4654                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4655
4656         return NL_SKIP;
4657 }
4658
4659 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4660                               const u8 *addr)
4661 {
4662         struct i802_bss *bss = priv;
4663         struct wpa_driver_nl80211_data *drv = bss->drv;
4664         struct nl_msg *msg;
4665
4666         os_memset(data, 0, sizeof(*data));
4667         msg = nlmsg_alloc();
4668         if (!msg)
4669                 return -ENOMEM;
4670
4671         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4672                     0, NL80211_CMD_GET_STATION, 0);
4673
4674         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4675         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4676
4677         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4678  nla_put_failure:
4679         return -ENOBUFS;
4680 }
4681
4682
4683 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4684                                     int cw_min, int cw_max, int burst_time)
4685 {
4686         struct i802_bss *bss = priv;
4687         struct wpa_driver_nl80211_data *drv = bss->drv;
4688         struct nl_msg *msg;
4689         struct nlattr *txq, *params;
4690
4691         msg = nlmsg_alloc();
4692         if (!msg)
4693                 return -1;
4694
4695         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4696                     0, NL80211_CMD_SET_WIPHY, 0);
4697
4698         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4699
4700         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4701         if (!txq)
4702                 goto nla_put_failure;
4703
4704         /* We are only sending parameters for a single TXQ at a time */
4705         params = nla_nest_start(msg, 1);
4706         if (!params)
4707                 goto nla_put_failure;
4708
4709         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4710         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4711          * 32 usec, so need to convert the value here. */
4712         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4713         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4714         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4715         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4716
4717         nla_nest_end(msg, params);
4718
4719         nla_nest_end(msg, txq);
4720
4721         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4722                 return 0;
4723  nla_put_failure:
4724         return -1;
4725 }
4726
4727
4728 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4729 {
4730         struct i802_bss *bss = priv;
4731         struct wpa_driver_nl80211_data *drv = bss->drv;
4732         struct nl_msg *msg;
4733
4734         msg = nlmsg_alloc();
4735         if (!msg)
4736                 return -ENOMEM;
4737
4738         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4739                     NL80211_CMD_SET_BSS, 0);
4740
4741         if (cts >= 0)
4742                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4743         if (preamble >= 0)
4744                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4745         if (slot >= 0)
4746                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4747
4748         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(bss->ifname));
4749
4750         return send_and_recv_msgs(drv, msg, NULL, NULL);
4751  nla_put_failure:
4752         return -ENOBUFS;
4753 }
4754
4755
4756 static int i802_set_cts_protect(void *priv, int value)
4757 {
4758         return i802_set_bss(priv, value, -1, -1);
4759 }
4760
4761
4762 static int i802_set_preamble(void *priv, int value)
4763 {
4764         return i802_set_bss(priv, -1, value, -1);
4765 }
4766
4767
4768 static int i802_set_short_slot_time(void *priv, int value)
4769 {
4770         return i802_set_bss(priv, -1, -1, value);
4771 }
4772
4773
4774 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4775                              const char *ifname, int vlan_id)
4776 {
4777         struct i802_bss *bss = priv;
4778         struct wpa_driver_nl80211_data *drv = bss->drv;
4779         struct nl_msg *msg;
4780         int ret = -ENOBUFS;
4781
4782         msg = nlmsg_alloc();
4783         if (!msg)
4784                 return -ENOMEM;
4785
4786         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4787                     0, NL80211_CMD_SET_STATION, 0);
4788
4789         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4790                     if_nametoindex(bss->ifname));
4791         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4792         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4793                     if_nametoindex(ifname));
4794
4795         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4796         if (ret < 0) {
4797                 wpa_printf(MSG_ERROR, "nl80211: NL80211_ATTR_STA_VLAN (addr="
4798                            MACSTR " ifname=%s vlan_id=%d) failed: %d (%s)",
4799                            MAC2STR(addr), ifname, vlan_id, ret,
4800                            strerror(-ret));
4801         }
4802  nla_put_failure:
4803         return ret;
4804 }
4805
4806
4807 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4808 {
4809         struct i802_bss *bss = priv;
4810         struct wpa_driver_nl80211_data *drv = bss->drv;
4811         char name[IFNAMSIZ + 1];
4812
4813         os_snprintf(name, sizeof(name), "%s.sta%d", bss->ifname, aid);
4814         wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
4815                    " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
4816         if (val) {
4817                 if (nl80211_create_iface(drv, name, NL80211_IFTYPE_AP_VLAN,
4818                                          NULL, 1) < 0)
4819                         return -1;
4820                 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4821                 return i802_set_sta_vlan(priv, addr, name, 0);
4822         } else {
4823                 i802_set_sta_vlan(priv, addr, bss->ifname, 0);
4824                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4825                                                     name);
4826         }
4827 }
4828
4829
4830 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4831 {
4832         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4833         struct sockaddr_ll lladdr;
4834         unsigned char buf[3000];
4835         int len;
4836         socklen_t fromlen = sizeof(lladdr);
4837
4838         len = recvfrom(sock, buf, sizeof(buf), 0,
4839                        (struct sockaddr *)&lladdr, &fromlen);
4840         if (len < 0) {
4841                 perror("recv");
4842                 return;
4843         }
4844
4845         if (have_ifidx(drv, lladdr.sll_ifindex))
4846                 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4847 }
4848
4849
4850 static int i802_get_inact_sec(void *priv, const u8 *addr)
4851 {
4852         struct hostap_sta_driver_data data;
4853         int ret;
4854
4855         data.inactive_msec = (unsigned long) -1;
4856         ret = i802_read_sta_data(priv, &data, addr);
4857         if (ret || data.inactive_msec == (unsigned long) -1)
4858                 return -1;
4859         return data.inactive_msec / 1000;
4860 }
4861
4862
4863 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4864 {
4865 #if 0
4866         /* TODO */
4867 #endif
4868         return 0;
4869 }
4870
4871
4872 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4873                            int reason)
4874 {
4875         struct i802_bss *bss = priv;
4876         struct ieee80211_mgmt mgmt;
4877
4878         memset(&mgmt, 0, sizeof(mgmt));
4879         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4880                                           WLAN_FC_STYPE_DEAUTH);
4881         memcpy(mgmt.da, addr, ETH_ALEN);
4882         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4883         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4884         mgmt.u.deauth.reason_code = host_to_le16(reason);
4885         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4886                                             IEEE80211_HDRLEN +
4887                                             sizeof(mgmt.u.deauth));
4888 }
4889
4890
4891 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4892                              int reason)
4893 {
4894         struct i802_bss *bss = priv;
4895         struct ieee80211_mgmt mgmt;
4896
4897         memset(&mgmt, 0, sizeof(mgmt));
4898         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4899                                           WLAN_FC_STYPE_DISASSOC);
4900         memcpy(mgmt.da, addr, ETH_ALEN);
4901         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4902         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4903         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4904         return wpa_driver_nl80211_send_mlme(bss, (u8 *) &mgmt,
4905                                             IEEE80211_HDRLEN +
4906                                             sizeof(mgmt.u.disassoc));
4907 }
4908
4909
4910 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
4911                              const char *brname, const char *ifname)
4912 {
4913         int ifindex;
4914         char in_br[IFNAMSIZ];
4915
4916         os_strlcpy(drv->brname, brname, IFNAMSIZ);
4917         ifindex = if_nametoindex(brname);
4918         if (ifindex == 0) {
4919                 /*
4920                  * Bridge was configured, but the bridge device does
4921                  * not exist. Try to add it now.
4922                  */
4923                 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
4924                         wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
4925                                    "bridge interface %s: %s",
4926                                    brname, strerror(errno));
4927                         return -1;
4928                 }
4929                 drv->added_bridge = 1;
4930                 add_ifidx(drv, if_nametoindex(brname));
4931         }
4932
4933         if (linux_br_get(in_br, ifname) == 0) {
4934                 if (os_strcmp(in_br, brname) == 0)
4935                         return 0; /* already in the bridge */
4936
4937                 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
4938                            "bridge %s", ifname, in_br);
4939                 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
4940                         wpa_printf(MSG_ERROR, "nl80211: Failed to "
4941                                    "remove interface %s from bridge "
4942                                    "%s: %s",
4943                                    ifname, brname, strerror(errno));
4944                         return -1;
4945                 }
4946         }
4947
4948         wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
4949                    ifname, brname);
4950         if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
4951                 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
4952                            "into bridge %s: %s",
4953                            ifname, brname, strerror(errno));
4954                 return -1;
4955         }
4956         drv->added_if_into_bridge = 1;
4957
4958         return 0;
4959 }
4960
4961
4962 static void *i802_init(struct hostapd_data *hapd,
4963                        struct wpa_init_params *params)
4964 {
4965         struct wpa_driver_nl80211_data *drv;
4966         struct i802_bss *bss;
4967         size_t i;
4968         char brname[IFNAMSIZ];
4969         int ifindex, br_ifindex;
4970         int br_added = 0;
4971
4972         bss = wpa_driver_nl80211_init(hapd, params->ifname);
4973         if (bss == NULL)
4974                 return NULL;
4975
4976         drv = bss->drv;
4977         if (linux_br_get(brname, params->ifname) == 0) {
4978                 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
4979                            params->ifname, brname);
4980                 br_ifindex = if_nametoindex(brname);
4981         } else {
4982                 brname[0] = '\0';
4983                 br_ifindex = 0;
4984         }
4985
4986         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4987         drv->if_indices = drv->default_if_indices;
4988         for (i = 0; i < params->num_bridge; i++) {
4989                 if (params->bridge[i]) {
4990                         ifindex = if_nametoindex(params->bridge[i]);
4991                         if (ifindex)
4992                                 add_ifidx(drv, ifindex);
4993                         if (ifindex == br_ifindex)
4994                                 br_added = 1;
4995                 }
4996         }
4997         if (!br_added && br_ifindex &&
4998             (params->num_bridge == 0 || !params->bridge[0]))
4999                 add_ifidx(drv, br_ifindex);
5000
5001         /* start listening for EAPOL on the default AP interface */
5002         add_ifidx(drv, drv->ifindex);
5003
5004         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 0))
5005                 goto failed;
5006
5007         if (params->bssid) {
5008                 if (linux_set_ifhwaddr(drv->ioctl_sock, bss->ifname,
5009                                        params->bssid))
5010                         goto failed;
5011         }
5012
5013         if (wpa_driver_nl80211_set_mode(bss, IEEE80211_MODE_AP)) {
5014                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
5015                            "into AP mode", bss->ifname);
5016                 goto failed;
5017         }
5018
5019         if (params->num_bridge && params->bridge[0] &&
5020             i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
5021                 goto failed;
5022
5023         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1))
5024                 goto failed;
5025
5026         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
5027         if (drv->eapol_sock < 0) {
5028                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
5029                 goto failed;
5030         }
5031
5032         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
5033         {
5034                 printf("Could not register read socket for eapol\n");
5035                 goto failed;
5036         }
5037
5038         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, params->own_addr))
5039                 goto failed;
5040
5041         return bss;
5042
5043 failed:
5044         nl80211_remove_monitor_interface(drv);
5045         if (drv->ioctl_sock >= 0)
5046                 close(drv->ioctl_sock);
5047
5048         genl_family_put(drv->nl80211);
5049         nl_cache_free(drv->nl_cache);
5050         nl80211_handle_destroy(drv->nl_handle);
5051         nl_cb_put(drv->nl_cb);
5052
5053         os_free(drv);
5054         return NULL;
5055 }
5056
5057
5058 static void i802_deinit(void *priv)
5059 {
5060         wpa_driver_nl80211_deinit(priv);
5061 }
5062
5063 #endif /* HOSTAPD */
5064
5065
5066 static enum nl80211_iftype wpa_driver_nl80211_if_type(
5067         enum wpa_driver_if_type type)
5068 {
5069         switch (type) {
5070         case WPA_IF_STATION:
5071         case WPA_IF_P2P_CLIENT:
5072         case WPA_IF_P2P_GROUP:
5073                 return NL80211_IFTYPE_STATION;
5074         case WPA_IF_AP_VLAN:
5075                 return NL80211_IFTYPE_AP_VLAN;
5076         case WPA_IF_AP_BSS:
5077         case WPA_IF_P2P_GO:
5078                 return NL80211_IFTYPE_AP;
5079         }
5080         return -1;
5081 }
5082
5083
5084 static int wpa_driver_nl80211_if_add(void *priv, enum wpa_driver_if_type type,
5085                                      const char *ifname, const u8 *addr,
5086                                      void *bss_ctx, void **drv_priv,
5087                                      char *force_ifname, u8 *if_addr)
5088 {
5089         struct i802_bss *bss = priv;
5090         struct wpa_driver_nl80211_data *drv = bss->drv;
5091         int ifidx;
5092 #ifdef HOSTAPD
5093         struct i802_bss *new_bss = NULL;
5094
5095         if (type == WPA_IF_AP_BSS) {
5096                 new_bss = os_zalloc(sizeof(*new_bss));
5097                 if (new_bss == NULL)
5098                         return -1;
5099         }
5100 #endif /* HOSTAPD */
5101
5102         if (addr)
5103                 os_memcpy(if_addr, addr, ETH_ALEN);
5104         ifidx = nl80211_create_iface(drv, ifname,
5105                                      wpa_driver_nl80211_if_type(type), addr,
5106                                      0);
5107         if (ifidx < 0) {
5108 #ifdef HOSTAPD
5109                 os_free(new_bss);
5110 #endif /* HOSTAPD */
5111                 return -1;
5112         }
5113
5114         if (!addr &&
5115             linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, if_addr) < 0)
5116                 return -1;
5117
5118 #ifdef HOSTAPD
5119         if (type == WPA_IF_AP_BSS) {
5120                 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
5121                         nl80211_remove_iface(drv, ifidx);
5122                         os_free(new_bss);
5123                         return -1;
5124                 }
5125                 os_strlcpy(new_bss->ifname, ifname, IFNAMSIZ);
5126                 new_bss->ifindex = ifidx;
5127                 new_bss->drv = drv;
5128                 new_bss->next = drv->first_bss.next;
5129                 drv->first_bss.next = new_bss;
5130                 if (drv_priv)
5131                         *drv_priv = new_bss;
5132         }
5133 #endif /* HOSTAPD */
5134
5135         return 0;
5136 }
5137
5138
5139 static int wpa_driver_nl80211_if_remove(void *priv,
5140                                         enum wpa_driver_if_type type,
5141                                         const char *ifname)
5142 {
5143         struct i802_bss *bss = priv;
5144         struct wpa_driver_nl80211_data *drv = bss->drv;
5145         int ifindex = if_nametoindex(ifname);
5146
5147         wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
5148                    __func__, type, ifname, ifindex);
5149         if (ifindex <= 0)
5150                 return -1;
5151         nl80211_remove_iface(drv, ifindex);
5152
5153 #ifdef HOSTAPD
5154         if (type != WPA_IF_AP_BSS)
5155                 return 0;
5156
5157         if (bss != &drv->first_bss) {
5158                 struct i802_bss *tbss = &drv->first_bss;
5159
5160                 while (tbss) {
5161                         if (tbss->next != bss)
5162                                 continue;
5163
5164                         tbss->next = bss->next;
5165                         os_free(bss);
5166                         break;
5167                 }
5168         }
5169 #endif /* HOSTAPD */
5170
5171         return 0;
5172 }
5173
5174
5175 static int cookie_handler(struct nl_msg *msg, void *arg)
5176 {
5177         struct nlattr *tb[NL80211_ATTR_MAX + 1];
5178         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
5179         u64 *cookie = arg;
5180         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
5181                   genlmsg_attrlen(gnlh, 0), NULL);
5182         if (tb[NL80211_ATTR_COOKIE])
5183                 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
5184         return NL_SKIP;
5185 }
5186
5187
5188 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
5189                                           const u8 *dst, const u8 *src,
5190                                           const u8 *bssid,
5191                                           const u8 *data, size_t data_len)
5192 {
5193         struct i802_bss *bss = priv;
5194         struct wpa_driver_nl80211_data *drv = bss->drv;
5195         int ret = -1;
5196         struct nl_msg *msg;
5197         u8 *buf;
5198         struct ieee80211_hdr *hdr;
5199         u64 cookie;
5200
5201         wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
5202                    drv->ifindex);
5203
5204         buf = os_zalloc(24 + data_len);
5205         if (buf == NULL)
5206                 return ret;
5207         os_memcpy(buf + 24, data, data_len);
5208         hdr = (struct ieee80211_hdr *) buf;
5209         hdr->frame_control =
5210                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
5211         os_memcpy(hdr->addr1, dst, ETH_ALEN);
5212         os_memcpy(hdr->addr2, src, ETH_ALEN);
5213         os_memcpy(hdr->addr3, bssid, ETH_ALEN);
5214
5215         if (drv->nlmode == NL80211_IFTYPE_AP) {
5216                 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
5217                 os_free(buf);
5218                 return ret;
5219         }
5220
5221         msg = nlmsg_alloc();
5222         if (!msg) {
5223                 os_free(buf);
5224                 return -1;
5225         }
5226
5227         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5228                     NL80211_CMD_ACTION, 0);
5229
5230         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5231         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5232         NLA_PUT(msg, NL80211_ATTR_FRAME, 24 + data_len, buf);
5233         os_free(buf);
5234         buf = NULL;
5235
5236         cookie = 0;
5237         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5238         msg = NULL;
5239         if (ret) {
5240                 wpa_printf(MSG_DEBUG, "nl80211: Action command failed: ret=%d "
5241                            "(%s)", ret, strerror(-ret));
5242                 goto nla_put_failure;
5243         }
5244         wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
5245                    "cookie 0x%llx", (long long unsigned int) cookie);
5246         drv->send_action_cookie = cookie;
5247         ret = 0;
5248
5249 nla_put_failure:
5250         os_free(buf);
5251         nlmsg_free(msg);
5252         return ret;
5253 }
5254
5255
5256 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
5257                                                 unsigned int duration)
5258 {
5259         struct i802_bss *bss = priv;
5260         struct wpa_driver_nl80211_data *drv = bss->drv;
5261         struct nl_msg *msg;
5262         int ret;
5263         u64 cookie;
5264
5265         msg = nlmsg_alloc();
5266         if (!msg)
5267                 return -1;
5268
5269         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5270                     NL80211_CMD_REMAIN_ON_CHANNEL, 0);
5271
5272         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5273         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
5274         NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
5275
5276         cookie = 0;
5277         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
5278         if (ret == 0) {
5279                 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
5280                            "0x%llx for freq=%u MHz duration=%u",
5281                            (long long unsigned int) cookie, freq, duration);
5282                 drv->remain_on_chan_cookie = cookie;
5283                 return 0;
5284         }
5285         wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
5286                    "(freq=%d duration=%u): %d (%s)",
5287                    freq, duration, ret, strerror(-ret));
5288 nla_put_failure:
5289         return -1;
5290 }
5291
5292
5293 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
5294 {
5295         struct i802_bss *bss = priv;
5296         struct wpa_driver_nl80211_data *drv = bss->drv;
5297         struct nl_msg *msg;
5298         int ret;
5299
5300         if (!drv->pending_remain_on_chan) {
5301                 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
5302                            "to cancel");
5303                 return -1;
5304         }
5305
5306         wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
5307                    "0x%llx",
5308                    (long long unsigned int) drv->remain_on_chan_cookie);
5309
5310         msg = nlmsg_alloc();
5311         if (!msg)
5312                 return -1;
5313
5314         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5315                     NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
5316
5317         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
5318         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
5319
5320         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5321         if (ret == 0)
5322                 return 0;
5323         wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
5324                    "%d (%s)", ret, strerror(-ret));
5325 nla_put_failure:
5326         return -1;
5327 }
5328
5329
5330 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
5331                                                         void *timeout_ctx)
5332 {
5333         struct wpa_driver_nl80211_data *drv = eloop_ctx;
5334         if (drv->monitor_ifidx < 0)
5335                 return; /* monitor interface already removed */
5336
5337         if (drv->nlmode != NL80211_IFTYPE_STATION)
5338                 return; /* not in station mode anymore */
5339
5340         if (drv->probe_req_report)
5341                 return; /* reporting enabled */
5342
5343         wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
5344                    "Probe Request reporting needed anymore");
5345         nl80211_remove_monitor_interface(drv);
5346 }
5347
5348
5349 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
5350 {
5351         struct i802_bss *bss = priv;
5352         struct wpa_driver_nl80211_data *drv = bss->drv;
5353
5354         if (drv->nlmode != NL80211_IFTYPE_STATION) {
5355                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
5356                            "allowed in station mode (iftype=%d)",
5357                            drv->nlmode);
5358                 return -1;
5359         }
5360         drv->probe_req_report = report;
5361
5362         if (report) {
5363                 eloop_cancel_timeout(
5364                         wpa_driver_nl80211_probe_req_report_timeout,
5365                         drv, NULL);
5366                 if (drv->monitor_ifidx < 0 &&
5367                     nl80211_create_monitor_interface(drv))
5368                         return -1;
5369         } else {
5370                 /*
5371                  * It takes a while to remove the monitor interface, so try to
5372                  * avoid doing this if it is needed again shortly. Instead,
5373                  * schedule the interface to be removed later if no need for it
5374                  * is seen.
5375                  */
5376                 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
5377                            "to be removed after 10 seconds of no use");
5378                 eloop_register_timeout(
5379                         10, 0, wpa_driver_nl80211_probe_req_report_timeout,
5380                         drv, NULL);
5381         }
5382
5383         return 0;
5384 }
5385
5386
5387 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
5388                                      int ifindex, int disabled)
5389 {
5390         struct nl_msg *msg;
5391         struct nlattr *bands, *band;
5392         int ret;
5393
5394         msg = nlmsg_alloc();
5395         if (!msg)
5396                 return -1;
5397
5398         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
5399                     NL80211_CMD_SET_TX_BITRATE_MASK, 0);
5400         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
5401
5402         bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
5403         if (!bands)
5404                 goto nla_put_failure;
5405
5406         /*
5407          * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
5408          * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
5409          * rates. All 5 GHz rates are left enabled.
5410          */
5411         band = nla_nest_start(msg, NL80211_BAND_2GHZ);
5412         if (!band)
5413                 goto nla_put_failure;
5414         NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
5415                 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
5416         nla_nest_end(msg, band);
5417
5418         nla_nest_end(msg, bands);
5419
5420         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
5421         msg = NULL;
5422         if (ret) {
5423                 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
5424                            "(%s)", ret, strerror(-ret));
5425         }
5426
5427         return ret;
5428
5429 nla_put_failure:
5430         nlmsg_free(msg);
5431         return -1;
5432 }
5433
5434
5435 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
5436 {
5437         struct i802_bss *bss = priv;
5438         struct wpa_driver_nl80211_data *drv = bss->drv;
5439         drv->disable_11b_rates = disabled;
5440         return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
5441 }
5442
5443
5444 static int wpa_driver_nl80211_deinit_ap(void *priv)
5445 {
5446         struct i802_bss *bss = priv;
5447         struct wpa_driver_nl80211_data *drv = bss->drv;
5448         if (drv->nlmode != NL80211_IFTYPE_AP)
5449                 return -1;
5450         wpa_driver_nl80211_del_beacon(drv);
5451         return wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
5452 }
5453
5454
5455 static void wpa_driver_nl80211_resume(void *priv)
5456 {
5457         struct i802_bss *bss = priv;
5458         struct wpa_driver_nl80211_data *drv = bss->drv;
5459         if (linux_set_iface_flags(drv->ioctl_sock, bss->ifname, 1)) {
5460                 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
5461                            "resume event");
5462         }
5463 }
5464
5465
5466 static int nl80211_send_ft_action(void *priv, u8 action, const u8 *target_ap,
5467                                   const u8 *ies, size_t ies_len)
5468 {
5469         struct i802_bss *bss = priv;
5470         struct wpa_driver_nl80211_data *drv = bss->drv;
5471         int ret;
5472         u8 *data, *pos;
5473         size_t data_len;
5474         u8 own_addr[ETH_ALEN];
5475
5476         if (linux_get_ifhwaddr(drv->ioctl_sock, bss->ifname, own_addr) < 0)
5477                 return -1;
5478
5479         if (action != 1) {
5480                 wpa_printf(MSG_ERROR, "nl80211: Unsupported send_ft_action "
5481                            "action %d", action);
5482                 return -1;
5483         }
5484
5485         /*
5486          * Action frame payload:
5487          * Category[1] = 6 (Fast BSS Transition)
5488          * Action[1] = 1 (Fast BSS Transition Request)
5489          * STA Address
5490          * Target AP Address
5491          * FT IEs
5492          */
5493
5494         data_len = 2 + 2 * ETH_ALEN + ies_len;
5495         data = os_malloc(data_len);
5496         if (data == NULL)
5497                 return -1;
5498         pos = data;
5499         *pos++ = 0x06; /* FT Action category */
5500         *pos++ = action;
5501         os_memcpy(pos, own_addr, ETH_ALEN);
5502         pos += ETH_ALEN;
5503         os_memcpy(pos, target_ap, ETH_ALEN);
5504         pos += ETH_ALEN;
5505         os_memcpy(pos, ies, ies_len);
5506
5507         ret = wpa_driver_nl80211_send_action(bss, drv->assoc_freq, drv->bssid,
5508                                              own_addr, drv->bssid,
5509                                              data, data_len);
5510         os_free(data);
5511
5512         return ret;
5513 }
5514
5515
5516 static int nl80211_signal_monitor(void *priv, int threshold, int hysteresis)
5517 {
5518         struct i802_bss *bss = priv;
5519         struct wpa_driver_nl80211_data *drv = bss->drv;
5520         struct nl_msg *msg, *cqm = NULL;
5521
5522         wpa_printf(MSG_DEBUG, "nl80211: Signal monitor threshold=%d "
5523                    "hysteresis=%d", threshold, hysteresis);
5524
5525         msg = nlmsg_alloc();
5526         if (!msg)
5527                 return -1;
5528
5529         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
5530                     0, NL80211_CMD_SET_CQM, 0);
5531
5532         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, bss->ifindex);
5533
5534         cqm = nlmsg_alloc();
5535         if (cqm == NULL)
5536                 return -1;
5537
5538         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_THOLD, threshold);
5539         NLA_PUT_U32(cqm, NL80211_ATTR_CQM_RSSI_HYST, hysteresis);
5540         nla_put_nested(msg, NL80211_ATTR_CQM, cqm);
5541
5542         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
5543                 return 0;
5544         msg = NULL;
5545
5546 nla_put_failure:
5547         if (cqm)
5548                 nlmsg_free(cqm);
5549         nlmsg_free(msg);
5550         return -1;
5551 }
5552
5553
5554 static int nl80211_send_frame(void *priv, const u8 *data, size_t data_len,
5555                               int encrypt)
5556 {
5557         struct i802_bss *bss = priv;
5558         struct wpa_driver_nl80211_data *drv = bss->drv;
5559         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
5560 }
5561
5562
5563 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5564         .name = "nl80211",
5565         .desc = "Linux nl80211/cfg80211",
5566         .get_bssid = wpa_driver_nl80211_get_bssid,
5567         .get_ssid = wpa_driver_nl80211_get_ssid,
5568         .set_key = wpa_driver_nl80211_set_key,
5569         .scan2 = wpa_driver_nl80211_scan,
5570         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5571         .deauthenticate = wpa_driver_nl80211_deauthenticate,
5572         .disassociate = wpa_driver_nl80211_disassociate,
5573         .authenticate = wpa_driver_nl80211_authenticate,
5574         .associate = wpa_driver_nl80211_associate,
5575         .init = wpa_driver_nl80211_init,
5576         .deinit = wpa_driver_nl80211_deinit,
5577         .get_capa = wpa_driver_nl80211_get_capa,
5578         .set_operstate = wpa_driver_nl80211_set_operstate,
5579         .set_supp_port = wpa_driver_nl80211_set_supp_port,
5580         .set_country = wpa_driver_nl80211_set_country,
5581         .set_beacon = wpa_driver_nl80211_set_beacon,
5582         .if_add = wpa_driver_nl80211_if_add,
5583         .if_remove = wpa_driver_nl80211_if_remove,
5584         .send_mlme = wpa_driver_nl80211_send_mlme,
5585         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5586         .sta_add = wpa_driver_nl80211_sta_add,
5587         .sta_remove = wpa_driver_nl80211_sta_remove,
5588         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
5589         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
5590 #ifdef HOSTAPD
5591         .hapd_init = i802_init,
5592         .hapd_deinit = i802_deinit,
5593         .get_seqnum = i802_get_seqnum,
5594         .flush = i802_flush,
5595         .read_sta_data = i802_read_sta_data,
5596         .sta_deauth = i802_sta_deauth,
5597         .sta_disassoc = i802_sta_disassoc,
5598         .get_inact_sec = i802_get_inact_sec,
5599         .sta_clear_stats = i802_sta_clear_stats,
5600         .set_rts = i802_set_rts,
5601         .set_frag = i802_set_frag,
5602         .set_rate_sets = i802_set_rate_sets,
5603         .set_cts_protect = i802_set_cts_protect,
5604         .set_preamble = i802_set_preamble,
5605         .set_short_slot_time = i802_set_short_slot_time,
5606         .set_tx_queue_params = i802_set_tx_queue_params,
5607         .set_sta_vlan = i802_set_sta_vlan,
5608         .set_wds_sta = i802_set_wds_sta,
5609 #endif /* HOSTAPD */
5610         .set_freq = i802_set_freq,
5611         .send_action = wpa_driver_nl80211_send_action,
5612         .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
5613         .cancel_remain_on_channel =
5614         wpa_driver_nl80211_cancel_remain_on_channel,
5615         .probe_req_report = wpa_driver_nl80211_probe_req_report,
5616         .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
5617         .deinit_ap = wpa_driver_nl80211_deinit_ap,
5618         .resume = wpa_driver_nl80211_resume,
5619         .send_ft_action = nl80211_send_ft_action,
5620         .signal_monitor = nl80211_signal_monitor,
5621         .send_frame = nl80211_send_frame,
5622 };