src/drivers/driver_nl80211.c

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