src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2008, 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_arp.h>
  22 #include <netlink/genl/genl.h>
  23 #include <netlink/genl/family.h>
  24 #include <netlink/genl/ctrl.h>
  25 #include "nl80211_copy.h"
  26 #include "wireless_copy.h"
  27
  28 #include "common.h"
  29 #include "driver.h"
  30 #include "eloop.h"
  31 #include "ieee802_11_defs.h"
  32
  33 #if defined(CONFIG_AP) || defined(HOSTAPD)
  34 #include <netpacket/packet.h>
  35 #include <linux/filter.h>
  36 #include "radiotap.h"
  37 #include "radiotap_iter.h"
  38 #endif /* CONFIG_AP || HOSTAPD */
  39
  40 #ifdef CONFIG_AP
  41
  42 #include "../hostapd/hostapd_defs.h"
  43
  44 #ifndef ETH_P_ALL
  45 #define ETH_P_ALL 0x0003
  46 #endif
  47
  48 #endif /* CONFIG_AP */
  49
  50 #ifdef HOSTAPD
  51 #include "../../hostapd/hostapd.h"
  52 #include "../../hostapd/sta_flags.h"
  53 #include "ieee802_11_common.h"
  54
  55 #ifdef CONFIG_LIBNL20
  56 /* libnl 2.0 compatibility code */
  57 #define nl_handle_alloc_cb nl_socket_alloc_cb
  58 #define nl_handle_destroy nl_socket_free
  59 #endif /* CONFIG_LIBNL20 */
  60
  61 #endif /* HOSTAPD */
  62
  63
  64 #ifndef IFF_LOWER_UP
  65 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  66 #endif
  67 #ifndef IFF_DORMANT
  68 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  69 #endif
  70
  71 #ifndef IF_OPER_DORMANT
  72 #define IF_OPER_DORMANT 5
  73 #endif
  74 #ifndef IF_OPER_UP
  75 #define IF_OPER_UP 6
  76 #endif
  77
  78 enum ieee80211_msg_type {
  79         ieee80211_msg_normal = 0,
  80         ieee80211_msg_tx_callback_ack = 1,
  81         ieee80211_msg_tx_callback_fail = 2,
  82 };
  83
  84 struct i802_bss {
  85         struct i802_bss *next;
  86         int ifindex;
  87         unsigned int beacon_set:1;
  88 };
  89
  90 struct wpa_driver_nl80211_data {
  91         void *ctx;
  92         int link_event_sock;
  93         int ioctl_sock; /* socket for ioctl() use */
  94         char ifname[IFNAMSIZ + 1];
  95         int ifindex;
  96         int if_removed;
  97         struct wpa_driver_capa capa;
  98         int has_capability;
  99
 100         int operstate;
 101
 102         int scan_complete_events;
 103
 104         struct nl_handle *nl_handle;
 105         struct nl_cache *nl_cache;
 106         struct nl_cb *nl_cb;
 107         struct genl_family *nl80211;
 108
 109         u8 bssid[ETH_ALEN];
 110         int associated;
 111         u8 ssid[32];
 112         size_t ssid_len;
 113
 114 #if defined(CONFIG_AP) || defined(HOSTAPD)
 115         int beacon_int;
 116         int monitor_sock;
 117         int monitor_ifidx;
 118 #endif /* CONFIG_AP || HOSTAPD */
 119
 120 #ifdef CONFIG_AP
 121         unsigned int beacon_set:1;
 122 #endif /* CONFIG_AP */
 123
 124 #ifdef HOSTAPD
 125         struct hostapd_data *hapd;
 126
 127         int eapol_sock; /* socket for EAPOL frames */
 128
 129         int default_if_indices[16];
 130         int *if_indices;
 131         int num_if_indices;
 132
 133         struct i802_bss bss;
 134         unsigned int ht_40mhz_scan:1;
 135
 136         int last_freq;
 137         int last_freq_ht;
 138         struct hostapd_neighbor_bss *neighbors;
 139         size_t num_neighbors;
 140 #endif /* HOSTAPD */
 141 };
 142
 143
 144 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 145                                             void *timeout_ctx);
 146 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
 147                                        int mode);
 148 static int
 149 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 150
 151 #ifdef CONFIG_AP
 152 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 153                                  int ifidx);
 154 #endif /* CONFIG_AP */
 155
 156 #ifdef HOSTAPD
 157 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 158 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 159 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 160                                  int ifindex);
 161 #endif /* HOSTAPD */
 162
 163
 164 /* nl80211 code */
 165 static int ack_handler(struct nl_msg *msg, void *arg)
 166 {
 167         int *err = arg;
 168         *err = 0;
 169         return NL_STOP;
 170 }
 171
 172 static int finish_handler(struct nl_msg *msg, void *arg)
 173 {
 174         int *ret = arg;
 175         *ret = 0;
 176         return NL_SKIP;
 177 }
 178
 179 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 180                          void *arg)
 181 {
 182         int *ret = arg;
 183         *ret = err->error;
 184         return NL_SKIP;
 185 }
 186
 187
 188 static int no_seq_check(struct nl_msg *msg, void *arg)
 189 {
 190         return NL_OK;
 191 }
 192
 193
 194 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 195                               struct nl_msg *msg,
 196                               int (*valid_handler)(struct nl_msg *, void *),
 197                               void *valid_data)
 198 {
 199         struct nl_cb *cb;
 200         int err = -ENOMEM;
 201
 202         cb = nl_cb_clone(drv->nl_cb);
 203         if (!cb)
 204                 goto out;
 205
 206         err = nl_send_auto_complete(drv->nl_handle, msg);
 207         if (err < 0)
 208                 goto out;
 209
 210         err = 1;
 211
 212         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 213         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 214         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 215
 216         if (valid_handler)
 217                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 218                           valid_handler, valid_data);
 219
 220         while (err > 0)
 221                 nl_recvmsgs(drv->nl_handle, cb);
 222  out:
 223         nl_cb_put(cb);
 224         nlmsg_free(msg);
 225         return err;
 226 }
 227
 228
 229 struct family_data {
 230         const char *group;
 231         int id;
 232 };
 233
 234
 235 static int family_handler(struct nl_msg *msg, void *arg)
 236 {
 237         struct family_data *res = arg;
 238         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 239         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 240         struct nlattr *mcgrp;
 241         int i;
 242
 243         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 244                   genlmsg_attrlen(gnlh, 0), NULL);
 245         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 246                 return NL_SKIP;
 247
 248         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 249                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 250                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 251                           nla_len(mcgrp), NULL);
 252                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 253                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 254                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 255                                res->group,
 256                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 257                         continue;
 258                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 259                 break;
 260         };
 261
 262         return NL_SKIP;
 263 }
 264
 265
 266 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 267                                const char *family, const char *group)
 268 {
 269         struct nl_msg *msg;
 270         int ret = -1;
 271         struct family_data res = { group, -ENOENT };
 272
 273         msg = nlmsg_alloc();
 274         if (!msg)
 275                 return -ENOMEM;
 276         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 277                     0, 0, CTRL_CMD_GETFAMILY, 0);
 278         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 279
 280         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 281         msg = NULL;
 282         if (ret == 0)
 283                 ret = res.id;
 284
 285 nla_put_failure:
 286         nlmsg_free(msg);
 287         return ret;
 288 }
 289
 290
 291 static int wpa_driver_nl80211_send_oper_ifla(
 292         struct wpa_driver_nl80211_data *drv,
 293         int linkmode, int operstate)
 294 {
 295         struct {
 296                 struct nlmsghdr hdr;
 297                 struct ifinfomsg ifinfo;
 298                 char opts[16];
 299         } req;
 300         struct rtattr *rta;
 301         static int nl_seq;
 302         ssize_t ret;
 303
 304         os_memset(&req, 0, sizeof(req));
 305
 306         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 307         req.hdr.nlmsg_type = RTM_SETLINK;
 308         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 309         req.hdr.nlmsg_seq = ++nl_seq;
 310         req.hdr.nlmsg_pid = 0;
 311
 312         req.ifinfo.ifi_family = AF_UNSPEC;
 313         req.ifinfo.ifi_type = 0;
 314         req.ifinfo.ifi_index = drv->ifindex;
 315         req.ifinfo.ifi_flags = 0;
 316         req.ifinfo.ifi_change = 0;
 317
 318         if (linkmode != -1) {
 319                 rta = (struct rtattr *)
 320                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 321                 rta->rta_type = IFLA_LINKMODE;
 322                 rta->rta_len = RTA_LENGTH(sizeof(char));
 323                 *((char *) RTA_DATA(rta)) = linkmode;
 324                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 325                         RTA_LENGTH(sizeof(char));
 326         }
 327         if (operstate != -1) {
 328                 rta = (struct rtattr *)
 329                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 330                 rta->rta_type = IFLA_OPERSTATE;
 331                 rta->rta_len = RTA_LENGTH(sizeof(char));
 332                 *((char *) RTA_DATA(rta)) = operstate;
 333                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 334                         RTA_LENGTH(sizeof(char));
 335         }
 336
 337         wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
 338                    linkmode, operstate);
 339
 340         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 341         if (ret < 0) {
 342                 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
 343                            " %s (assume operstate is not supported)",
 344                            strerror(errno));
 345         }
 346
 347         return ret < 0 ? -1 : 0;
 348 }
 349
 350
 351 static int wpa_driver_nl80211_set_auth_param(
 352         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 353 {
 354         struct iwreq iwr;
 355         int ret = 0;
 356
 357         os_memset(&iwr, 0, sizeof(iwr));
 358         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 359         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 360         iwr.u.param.value = value;
 361
 362         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 363                 if (errno != EOPNOTSUPP) {
 364                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 365                                    "value 0x%x) failed: %s)",
 366                                    idx, value, strerror(errno));
 367                 }
 368                 ret = errno == EOPNOTSUPP ? -2 : -1;
 369         }
 370
 371         return ret;
 372 }
 373
 374
 375 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 376 {
 377         struct wpa_driver_nl80211_data *drv = priv;
 378         if (!drv->associated)
 379                 return -1;
 380         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 381         return 0;
 382 }
 383
 384
 385 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 386 {
 387         struct wpa_driver_nl80211_data *drv = priv;
 388         if (!drv->associated)
 389                 return -1;
 390         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 391         return drv->ssid_len;
 392 }
 393
 394
 395 #ifndef HOSTAPD
 396 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 397                                           void *ctx, char *buf, size_t len,
 398                                           int del)
 399 {
 400         union wpa_event_data event;
 401
 402         os_memset(&event, 0, sizeof(event));
 403         if (len > sizeof(event.interface_status.ifname))
 404                 len = sizeof(event.interface_status.ifname) - 1;
 405         os_memcpy(event.interface_status.ifname, buf, len);
 406         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 407                 EVENT_INTERFACE_ADDED;
 408
 409         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 410                    del ? "DEL" : "NEW",
 411                    event.interface_status.ifname,
 412                    del ? "removed" : "added");
 413
 414         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 415                 if (del)
 416                         drv->if_removed = 1;
 417                 else
 418                         drv->if_removed = 0;
 419         }
 420
 421         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 422 }
 423
 424
 425 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 426                                          struct nlmsghdr *h)
 427 {
 428         struct ifinfomsg *ifi;
 429         int attrlen, _nlmsg_len, rta_len;
 430         struct rtattr *attr;
 431
 432         ifi = NLMSG_DATA(h);
 433
 434         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 435
 436         attrlen = h->nlmsg_len - _nlmsg_len;
 437         if (attrlen < 0)
 438                 return 0;
 439
 440         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 441
 442         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 443         while (RTA_OK(attr, attrlen)) {
 444                 if (attr->rta_type == IFLA_IFNAME) {
 445                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 446                             == 0)
 447                                 return 1;
 448                         else
 449                                 break;
 450                 }
 451                 attr = RTA_NEXT(attr, attrlen);
 452         }
 453
 454         return 0;
 455 }
 456
 457
 458 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 459                                           int ifindex, struct nlmsghdr *h)
 460 {
 461         if (drv->ifindex == ifindex)
 462                 return 1;
 463
 464         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 465                 drv->ifindex = if_nametoindex(drv->ifname);
 466                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 467                            "interface");
 468                 wpa_driver_nl80211_finish_drv_init(drv);
 469                 return 1;
 470         }
 471
 472         return 0;
 473 }
 474
 475
 476 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 477                                               void *ctx, struct nlmsghdr *h,
 478                                               size_t len)
 479 {
 480         struct ifinfomsg *ifi;
 481         int attrlen, _nlmsg_len, rta_len;
 482         struct rtattr * attr;
 483
 484         if (len < sizeof(*ifi))
 485                 return;
 486
 487         ifi = NLMSG_DATA(h);
 488
 489         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 490                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 491                            ifi->ifi_index);
 492                 return;
 493         }
 494
 495         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 496                    "(%s%s%s%s)",
 497                    drv->operstate, ifi->ifi_flags,
 498                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 499                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 500                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 501                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 502         /*
 503          * Some drivers send the association event before the operup event--in
 504          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 505          * fails. This will hit us when wpa_supplicant does not need to do
 506          * IEEE 802.1X authentication
 507          */
 508         if (drv->operstate == 1 &&
 509             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 510             !(ifi->ifi_flags & IFF_RUNNING))
 511                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 512
 513         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 514
 515         attrlen = h->nlmsg_len - _nlmsg_len;
 516         if (attrlen < 0)
 517                 return;
 518
 519         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 520
 521         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 522         while (RTA_OK(attr, attrlen)) {
 523                 if (attr->rta_type == IFLA_IFNAME) {
 524                         wpa_driver_nl80211_event_link(
 525                                 drv, ctx,
 526                                 ((char *) attr) + rta_len,
 527                                 attr->rta_len - rta_len, 0);
 528                 }
 529                 attr = RTA_NEXT(attr, attrlen);
 530         }
 531 }
 532
 533
 534 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 535                                               void *ctx, struct nlmsghdr *h,
 536                                               size_t len)
 537 {
 538         struct ifinfomsg *ifi;
 539         int attrlen, _nlmsg_len, rta_len;
 540         struct rtattr * attr;
 541
 542         if (len < sizeof(*ifi))
 543                 return;
 544
 545         ifi = NLMSG_DATA(h);
 546
 547         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 548
 549         attrlen = h->nlmsg_len - _nlmsg_len;
 550         if (attrlen < 0)
 551                 return;
 552
 553         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 554
 555         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 556         while (RTA_OK(attr, attrlen)) {
 557                 if (attr->rta_type == IFLA_IFNAME) {
 558                         wpa_driver_nl80211_event_link(
 559                                 drv, ctx,
 560                                 ((char *) attr) + rta_len,
 561                                 attr->rta_len - rta_len, 1);
 562                 }
 563                 attr = RTA_NEXT(attr, attrlen);
 564         }
 565 }
 566
 567
 568 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 569                                                   void *sock_ctx)
 570 {
 571         char buf[8192];
 572         int left;
 573         struct sockaddr_nl from;
 574         socklen_t fromlen;
 575         struct nlmsghdr *h;
 576         int max_events = 10;
 577
 578 try_again:
 579         fromlen = sizeof(from);
 580         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 581                         (struct sockaddr *) &from, &fromlen);
 582         if (left < 0) {
 583                 if (errno != EINTR && errno != EAGAIN)
 584                         perror("recvfrom(netlink)");
 585                 return;
 586         }
 587
 588         h = (struct nlmsghdr *) buf;
 589         while (left >= (int) sizeof(*h)) {
 590                 int len, plen;
 591
 592                 len = h->nlmsg_len;
 593                 plen = len - sizeof(*h);
 594                 if (len > left || plen < 0) {
 595                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 596                                    "len=%d left=%d plen=%d",
 597                                    len, left, plen);
 598                         break;
 599                 }
 600
 601                 switch (h->nlmsg_type) {
 602                 case RTM_NEWLINK:
 603                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 604                                                           h, plen);
 605                         break;
 606                 case RTM_DELLINK:
 607                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 608                                                           h, plen);
 609                         break;
 610                 }
 611
 612                 len = NLMSG_ALIGN(len);
 613                 left -= len;
 614                 h = (struct nlmsghdr *) ((char *) h + len);
 615         }
 616
 617         if (left > 0) {
 618                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 619                            "message", left);
 620         }
 621
 622         if (--max_events > 0) {
 623                 /*
 624                  * Try to receive all events in one eloop call in order to
 625                  * limit race condition on cases where AssocInfo event, Assoc
 626                  * event, and EAPOL frames are received more or less at the
 627                  * same time. We want to process the event messages first
 628                  * before starting EAPOL processing.
 629                  */
 630                 goto try_again;
 631         }
 632 }
 633
 634
 635 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 636                             const u8 *frame, size_t len)
 637 {
 638         const struct ieee80211_mgmt *mgmt;
 639         union wpa_event_data event;
 640
 641         mgmt = (const struct ieee80211_mgmt *) frame;
 642         if (len < 24 + sizeof(mgmt->u.auth)) {
 643                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 644                            "frame");
 645                 return;
 646         }
 647
 648         os_memset(&event, 0, sizeof(event));
 649         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 650         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 651         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 652         if (len > 24 + sizeof(mgmt->u.auth)) {
 653                 event.auth.ies = mgmt->u.auth.variable;
 654                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 655         }
 656
 657         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 658 }
 659
 660
 661 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 662                             const u8 *frame, size_t len)
 663 {
 664         const struct ieee80211_mgmt *mgmt;
 665         union wpa_event_data event;
 666         u16 status;
 667
 668         mgmt = (const struct ieee80211_mgmt *) frame;
 669         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 670                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 671                            "frame");
 672                 return;
 673         }
 674
 675         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 676         if (status != WLAN_STATUS_SUCCESS) {
 677                 os_memset(&event, 0, sizeof(event));
 678                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 679                         event.assoc_reject.resp_ies =
 680                                 (u8 *) mgmt->u.assoc_resp.variable;
 681                         event.assoc_reject.resp_ies_len =
 682                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 683                 }
 684                 event.assoc_reject.status_code = status;
 685
 686                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 687                 return;
 688         }
 689
 690         drv->associated = 1;
 691         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 692
 693         os_memset(&event, 0, sizeof(event));
 694         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 695                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 696                 event.assoc_info.resp_ies_len =
 697                         len - 24 - sizeof(mgmt->u.assoc_resp);
 698         }
 699
 700         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 701 }
 702
 703
 704 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 705                        enum nl80211_commands cmd, struct nlattr *frame)
 706 {
 707         if (frame == NULL) {
 708                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 709                            "data", cmd);
 710                 return;
 711         }
 712
 713         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 714         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 715                     nla_data(frame), nla_len(frame));
 716
 717         switch (cmd) {
 718         case NL80211_CMD_AUTHENTICATE:
 719                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 720                 break;
 721         case NL80211_CMD_ASSOCIATE:
 722                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 723                 break;
 724         case NL80211_CMD_DEAUTHENTICATE:
 725                 drv->associated = 0;
 726                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 727                 break;
 728         case NL80211_CMD_DISASSOCIATE:
 729                 drv->associated = 0;
 730                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 731                 break;
 732         default:
 733                 break;
 734         }
 735 }
 736
 737 #endif /* HOSTAPD */
 738
 739
 740 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 741                                            struct nlattr *tb[])
 742 {
 743 #ifdef HOSTAPD
 744         if (tb[NL80211_ATTR_MAC])
 745                 hostapd_michael_mic_failure(drv->hapd,
 746                                             nla_data(tb[NL80211_ATTR_MAC]));
 747 #else /* HOSTAPD */
 748         union wpa_event_data data;
 749
 750         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 751         os_memset(&data, 0, sizeof(data));
 752         if (tb[NL80211_ATTR_MAC]) {
 753                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 754                             nla_data(tb[NL80211_ATTR_MAC]),
 755                             nla_len(tb[NL80211_ATTR_MAC]));
 756         }
 757         if (tb[NL80211_ATTR_KEY_SEQ]) {
 758                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 759                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 760                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 761         }
 762         if (tb[NL80211_ATTR_KEY_TYPE]) {
 763                 enum nl80211_key_type key_type =
 764                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 765                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 766                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 767                         data.michael_mic_failure.unicast = 1;
 768         } else
 769                 data.michael_mic_failure.unicast = 1;
 770
 771         if (tb[NL80211_ATTR_KEY_IDX]) {
 772                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 773                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 774         }
 775
 776         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 777 #endif /* HOSTAPD */
 778 }
 779
 780
 781 static int process_event(struct nl_msg *msg, void *arg)
 782 {
 783         struct wpa_driver_nl80211_data *drv = arg;
 784         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 785         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 786
 787         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 788                   genlmsg_attrlen(gnlh, 0), NULL);
 789
 790         if (tb[NL80211_ATTR_IFINDEX]) {
 791                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 792                 if (ifindex != drv->ifindex) {
 793                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 794                                    " for foreign interface (ifindex %d)",
 795                                    gnlh->cmd, ifindex);
 796                         return NL_SKIP;
 797                 }
 798         }
 799
 800         switch (gnlh->cmd) {
 801 #ifndef HOSTAPD
 802         case NL80211_CMD_NEW_SCAN_RESULTS:
 803                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 804                 drv->scan_complete_events = 1;
 805                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 806                                      drv->ctx);
 807                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 808                 break;
 809         case NL80211_CMD_SCAN_ABORTED:
 810                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 811                 /*
 812                  * Need to indicate that scan results are available in order
 813                  * not to make wpa_supplicant stop its scanning.
 814                  */
 815                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 816                                      drv->ctx);
 817                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 818                 break;
 819         case NL80211_CMD_AUTHENTICATE:
 820         case NL80211_CMD_ASSOCIATE:
 821         case NL80211_CMD_DEAUTHENTICATE:
 822         case NL80211_CMD_DISASSOCIATE:
 823                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
 824                 break;
 825 #endif /* HOSTAPD */
 826         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 827                 mlme_event_michael_mic_failure(drv, tb);
 828                 break;
 829         default:
 830                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 831                            "(cmd=%d)", gnlh->cmd);
 832                 break;
 833         }
 834
 835         return NL_SKIP;
 836 }
 837
 838
 839 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 840                                              void *sock_ctx)
 841 {
 842         struct nl_cb *cb;
 843         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 844
 845         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 846
 847         cb = nl_cb_clone(drv->nl_cb);
 848         if (!cb)
 849                 return;
 850         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 851         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 852         nl_recvmsgs(drv->nl_handle, cb);
 853         nl_cb_put(cb);
 854 }
 855
 856
 857 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 858                                    const char *ifname, int dev_up)
 859 {
 860         struct ifreq ifr;
 861
 862         if (drv->ioctl_sock < 0)
 863                 return -1;
 864
 865         os_memset(&ifr, 0, sizeof(ifr));
 866         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 867
 868         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 869                 perror("ioctl[SIOCGIFFLAGS]");
 870                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 871                            ifname);
 872                 return -1;
 873         }
 874
 875         if (dev_up) {
 876                 if (ifr.ifr_flags & IFF_UP)
 877                         return 0;
 878                 ifr.ifr_flags |= IFF_UP;
 879         } else {
 880                 if (!(ifr.ifr_flags & IFF_UP))
 881                         return 0;
 882                 ifr.ifr_flags &= ~IFF_UP;
 883         }
 884
 885         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 886                 perror("ioctl[SIOCSIFFLAGS]");
 887                 return -1;
 888         }
 889
 890         return 0;
 891 }
 892
 893
 894 /**
 895  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 896  * @priv: driver_nl80211 private data
 897  * @alpha2_arg: country to which to switch to
 898  * Returns: 0 on success, -1 on failure
 899  *
 900  * This asks nl80211 to set the regulatory domain for given
 901  * country ISO / IEC alpha2.
 902  */
 903 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 904 {
 905         struct wpa_driver_nl80211_data *drv = priv;
 906         char alpha2[3];
 907         struct nl_msg *msg;
 908
 909         msg = nlmsg_alloc();
 910         if (!msg)
 911                 return -ENOMEM;
 912
 913         alpha2[0] = alpha2_arg[0];
 914         alpha2[1] = alpha2_arg[1];
 915         alpha2[2] = '\0';
 916
 917         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 918                     0, NL80211_CMD_REQ_SET_REG, 0);
 919
 920         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 921         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 922                 return -EINVAL;
 923         return 0;
 924 nla_put_failure:
 925         return -EINVAL;
 926 }
 927
 928
 929 struct wiphy_info_data {
 930         int max_scan_ssids;
 931         int ap_supported;
 932 };
 933
 934
 935 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 936 {
 937         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 938         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 939         struct wiphy_info_data *info = arg;
 940
 941         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 942                   genlmsg_attrlen(gnlh, 0), NULL);
 943
 944         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 945                 info->max_scan_ssids =
 946                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 947
 948         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 949                 struct nlattr *nl_mode;
 950                 int i;
 951                 nla_for_each_nested(nl_mode,
 952                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 953                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 954                                 info->ap_supported = 1;
 955                                 break;
 956                         }
 957                 }
 958         }
 959
 960         return NL_SKIP;
 961 }
 962
 963
 964 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 965                                        struct wiphy_info_data *info)
 966 {
 967         struct nl_msg *msg;
 968
 969         os_memset(info, 0, sizeof(*info));
 970         msg = nlmsg_alloc();
 971         if (!msg)
 972                 return -1;
 973
 974         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 975                     0, NL80211_CMD_GET_WIPHY, 0);
 976
 977         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 978
 979         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
 980                 return 0;
 981         msg = NULL;
 982 nla_put_failure:
 983         nlmsg_free(msg);
 984         return -1;
 985 }
 986
 987
 988 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
 989 {
 990         struct wiphy_info_data info;
 991         if (wpa_driver_nl80211_get_info(drv, &info))
 992                 return;
 993         drv->has_capability = 1;
 994         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
 995         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
 996                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
 997                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
 998                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
 999         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1000                 WPA_DRIVER_CAPA_ENC_WEP104 |
1001                 WPA_DRIVER_CAPA_ENC_TKIP |
1002                 WPA_DRIVER_CAPA_ENC_CCMP;
1003
1004         drv->capa.max_scan_ssids = info.max_scan_ssids;
1005         if (info.ap_supported)
1006                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1007 }
1008
1009
1010 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1011                                       void *ctx)
1012 {
1013         int ret;
1014
1015         /* Initialize generic netlink and nl80211 */
1016
1017         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1018         if (drv->nl_cb == NULL) {
1019                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1020                            "callbacks");
1021                 goto err1;
1022         }
1023
1024         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1025         if (drv->nl_handle == NULL) {
1026                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1027                            "callbacks");
1028                 goto err2;
1029         }
1030
1031         if (genl_connect(drv->nl_handle)) {
1032                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1033                            "netlink");
1034                 goto err3;
1035         }
1036
1037 #ifdef CONFIG_LIBNL20
1038         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1039                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1040                            "netlink cache");
1041                 goto err3;
1042         }
1043 #else /* CONFIG_LIBNL20 */
1044         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1045         if (drv->nl_cache == NULL) {
1046                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1047                            "netlink cache");
1048                 goto err3;
1049         }
1050 #endif /* CONFIG_LIBNL20 */
1051
1052
1053         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1054         if (drv->nl80211 == NULL) {
1055                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1056                            "found");
1057                 goto err4;
1058         }
1059
1060         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1061         if (ret >= 0)
1062                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1063         if (ret < 0) {
1064                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1065                            "membership for scan events: %d (%s)",
1066                            ret, strerror(-ret));
1067                 goto err4;
1068         }
1069
1070         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1071         if (ret >= 0)
1072                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1073         if (ret < 0) {
1074                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1075                            "membership for mlme events: %d (%s)",
1076                            ret, strerror(-ret));
1077                 goto err4;
1078         }
1079
1080         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1081                                  wpa_driver_nl80211_event_receive, drv, ctx);
1082
1083         return 0;
1084
1085 err4:
1086         nl_cache_free(drv->nl_cache);
1087 err3:
1088         nl_handle_destroy(drv->nl_handle);
1089 err2:
1090         nl_cb_put(drv->nl_cb);
1091 err1:
1092         return -1;
1093 }
1094
1095
1096 /**
1097  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1098  * @ctx: context to be used when calling wpa_supplicant functions,
1099  * e.g., wpa_supplicant_event()
1100  * @ifname: interface name, e.g., wlan0
1101  * Returns: Pointer to private data, %NULL on failure
1102  */
1103 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1104 {
1105         int s;
1106         struct sockaddr_nl local;
1107         struct wpa_driver_nl80211_data *drv;
1108
1109         drv = os_zalloc(sizeof(*drv));
1110         if (drv == NULL)
1111                 return NULL;
1112         drv->ctx = ctx;
1113         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1114 #ifdef CONFIG_AP
1115         drv->monitor_ifidx = -1;
1116         drv->monitor_sock = -1;
1117 #endif /* CONFIG_AP */
1118
1119         if (wpa_driver_nl80211_init_nl(drv, ctx))
1120                 goto err1;
1121
1122         drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1123
1124         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1125         if (drv->ioctl_sock < 0) {
1126                 perror("socket(PF_INET,SOCK_DGRAM)");
1127                 goto err5;
1128         }
1129
1130         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1131         if (s < 0) {
1132                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1133                 goto err6;
1134         }
1135
1136         os_memset(&local, 0, sizeof(local));
1137         local.nl_family = AF_NETLINK;
1138         local.nl_groups = RTMGRP_LINK;
1139         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1140                 perror("bind(netlink)");
1141                 close(s);
1142                 goto err6;
1143         }
1144
1145 #ifndef HOSTAPD
1146         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1147                                  ctx);
1148 #endif /* HOSTAPD */
1149         drv->link_event_sock = s;
1150
1151         if (wpa_driver_nl80211_finish_drv_init(drv))
1152                 goto err7;
1153
1154         return drv;
1155
1156 err7:
1157         eloop_unregister_read_sock(drv->link_event_sock);
1158         close(drv->link_event_sock);
1159 err6:
1160         close(drv->ioctl_sock);
1161 err5:
1162         genl_family_put(drv->nl80211);
1163         nl_cache_free(drv->nl_cache);
1164         nl_handle_destroy(drv->nl_handle);
1165         nl_cb_put(drv->nl_cb);
1166 err1:
1167         os_free(drv);
1168         return NULL;
1169 }
1170
1171
1172 static int
1173 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1174 {
1175         drv->ifindex = if_nametoindex(drv->ifname);
1176
1177         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1178                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1179                            "use managed mode");
1180         }
1181
1182         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1183                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1184                            "UP", drv->ifname);
1185                 return -1;
1186         }
1187
1188         wpa_driver_nl80211_capa(drv);
1189
1190         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1191
1192         return 0;
1193 }
1194
1195
1196 /**
1197  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1198  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1199  *
1200  * Shut down driver interface and processing of driver events. Free
1201  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1202  */
1203 static void wpa_driver_nl80211_deinit(void *priv)
1204 {
1205         struct wpa_driver_nl80211_data *drv = priv;
1206
1207 #ifdef CONFIG_AP
1208         if (drv->monitor_ifidx >= 0)
1209                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1210         if (drv->monitor_sock >= 0) {
1211                 eloop_unregister_read_sock(drv->monitor_sock);
1212                 close(drv->monitor_sock);
1213         }
1214 #endif /* CONFIG_AP */
1215
1216         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1217
1218         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1219
1220         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1221
1222         eloop_unregister_read_sock(drv->link_event_sock);
1223
1224         hostapd_set_iface_flags(drv, drv->ifname, 0);
1225         wpa_driver_nl80211_set_mode(drv, 0);
1226
1227         close(drv->link_event_sock);
1228         close(drv->ioctl_sock);
1229
1230         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1231         genl_family_put(drv->nl80211);
1232         nl_cache_free(drv->nl_cache);
1233         nl_handle_destroy(drv->nl_handle);
1234         nl_cb_put(drv->nl_cb);
1235
1236         os_free(drv);
1237 }
1238
1239
1240 /**
1241  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1242  * @eloop_ctx: Unused
1243  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1244  *
1245  * This function can be used as registered timeout when starting a scan to
1246  * generate a scan completed event if the driver does not report this.
1247  */
1248 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1249 {
1250         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1251 #ifndef HOSTAPD
1252         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1253 #endif /* HOSTAPD */
1254 }
1255
1256
1257 /**
1258  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1259  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1260  * @params: Scan parameters
1261  * Returns: 0 on success, -1 on failure
1262  */
1263 static int wpa_driver_nl80211_scan(void *priv,
1264                                    struct wpa_driver_scan_params *params)
1265 {
1266         struct wpa_driver_nl80211_data *drv = priv;
1267         int ret = 0, timeout;
1268         struct nl_msg *msg, *ssids, *freqs;
1269         size_t i;
1270
1271         msg = nlmsg_alloc();
1272         ssids = nlmsg_alloc();
1273         freqs = nlmsg_alloc();
1274         if (!msg || !ssids || !freqs) {
1275                 nlmsg_free(msg);
1276                 nlmsg_free(ssids);
1277                 nlmsg_free(freqs);
1278                 return -1;
1279         }
1280
1281         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1282                     NL80211_CMD_TRIGGER_SCAN, 0);
1283
1284         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1285
1286         for (i = 0; i < params->num_ssids; i++) {
1287                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1288                         params->ssids[i].ssid);
1289         }
1290         if (params->num_ssids)
1291                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1292
1293         if (params->extra_ies) {
1294                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1295                         params->extra_ies);
1296         }
1297
1298         if (params->freqs) {
1299                 for (i = 0; params->freqs[i]; i++)
1300                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1301                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1302         }
1303
1304         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1305         msg = NULL;
1306         if (ret) {
1307                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1308                            "(%s)", ret, strerror(-ret));
1309                 goto nla_put_failure;
1310         }
1311
1312         /* Not all drivers generate "scan completed" wireless event, so try to
1313          * read results after a timeout. */
1314         timeout = 10;
1315         if (drv->scan_complete_events) {
1316                 /*
1317                  * The driver seems to deliver events to notify when scan is
1318                  * complete, so use longer timeout to avoid race conditions
1319                  * with scanning and following association request.
1320                  */
1321                 timeout = 30;
1322         }
1323         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1324                    "seconds", ret, timeout);
1325         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1326         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1327                                drv, drv->ctx);
1328
1329 nla_put_failure:
1330         nlmsg_free(ssids);
1331         nlmsg_free(msg);
1332         nlmsg_free(freqs);
1333         return ret;
1334 }
1335
1336
1337 static int bss_info_handler(struct nl_msg *msg, void *arg)
1338 {
1339         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1340         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1341         struct nlattr *bss[NL80211_BSS_MAX + 1];
1342         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1343                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1344                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1345                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1346                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1347                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1348                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1349                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1350                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1351         };
1352         struct wpa_scan_results *res = arg;
1353         struct wpa_scan_res **tmp;
1354         struct wpa_scan_res *r;
1355         const u8 *ie;
1356         size_t ie_len;
1357
1358         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1359                   genlmsg_attrlen(gnlh, 0), NULL);
1360         if (!tb[NL80211_ATTR_BSS])
1361                 return NL_SKIP;
1362         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1363                              bss_policy))
1364                 return NL_SKIP;
1365         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1366                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1367                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1368         } else {
1369                 ie = NULL;
1370                 ie_len = 0;
1371         }
1372
1373         r = os_zalloc(sizeof(*r) + ie_len);
1374         if (r == NULL)
1375                 return NL_SKIP;
1376         if (bss[NL80211_BSS_BSSID])
1377                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1378                           ETH_ALEN);
1379         if (bss[NL80211_BSS_FREQUENCY])
1380                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1381         if (bss[NL80211_BSS_BEACON_INTERVAL])
1382                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1383         if (bss[NL80211_BSS_CAPABILITY])
1384                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1385         r->flags |= WPA_SCAN_NOISE_INVALID;
1386         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1387                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1388                 r->level /= 100; /* mBm to dBm */
1389                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1390         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1391                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1392                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1393         } else
1394                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1395         if (bss[NL80211_BSS_TSF])
1396                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1397         r->ie_len = ie_len;
1398         if (ie)
1399                 os_memcpy(r + 1, ie, ie_len);
1400
1401         tmp = os_realloc(res->res,
1402                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1403         if (tmp == NULL) {
1404                 os_free(r);
1405                 return NL_SKIP;
1406         }
1407         tmp[res->num++] = r;
1408         res->res = tmp;
1409
1410         return NL_SKIP;
1411 }
1412
1413
1414 /**
1415  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1416  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1417  * Returns: Scan results on success, -1 on failure
1418  */
1419 static struct wpa_scan_results *
1420 wpa_driver_nl80211_get_scan_results(void *priv)
1421 {
1422         struct wpa_driver_nl80211_data *drv = priv;
1423         struct nl_msg *msg;
1424         struct wpa_scan_results *res;
1425         int ret;
1426
1427         res = os_zalloc(sizeof(*res));
1428         if (res == NULL)
1429                 return 0;
1430         msg = nlmsg_alloc();
1431         if (!msg)
1432                 goto nla_put_failure;
1433
1434         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1435                     NL80211_CMD_GET_SCAN, 0);
1436         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1437
1438         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1439         msg = NULL;
1440         if (ret == 0) {
1441                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1442                            (unsigned long) res->num);
1443                 return res;
1444         }
1445         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1446                    "(%s)", ret, strerror(-ret));
1447 nla_put_failure:
1448         nlmsg_free(msg);
1449         wpa_scan_results_free(res);
1450         return NULL;
1451 }
1452
1453
1454 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1455                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1456                        const u8 *seq, size_t seq_len,
1457                        const u8 *key, size_t key_len)
1458 {
1459         struct nl_msg *msg;
1460         int ret;
1461
1462         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1463                    "set_tx=%d seq_len=%lu key_len=%lu",
1464                    __func__, ifindex, alg, addr, key_idx, set_tx,
1465                    (unsigned long) seq_len, (unsigned long) key_len);
1466
1467         msg = nlmsg_alloc();
1468         if (!msg)
1469                 return -ENOMEM;
1470
1471         if (alg == WPA_ALG_NONE) {
1472                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1473                             0, NL80211_CMD_DEL_KEY, 0);
1474         } else {
1475                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1476                             0, NL80211_CMD_NEW_KEY, 0);
1477                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1478                 switch (alg) {
1479                 case WPA_ALG_WEP:
1480                         if (key_len == 5)
1481                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1482                                             0x000FAC01);
1483                         else
1484                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1485                                             0x000FAC05);
1486                         break;
1487                 case WPA_ALG_TKIP:
1488                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1489                         break;
1490                 case WPA_ALG_CCMP:
1491                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1492                         break;
1493                 case WPA_ALG_IGTK:
1494                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1495                         break;
1496                 default:
1497                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1498                                    "algorithm %d", __func__, alg);
1499                         nlmsg_free(msg);
1500                         return -1;
1501                 }
1502         }
1503
1504         if (seq)
1505                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1506
1507         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1508         {
1509                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1510                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1511         }
1512         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1513         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1514
1515         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1516         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1517                 ret = 0;
1518         if (ret)
1519                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1520                            ret, strerror(-ret));
1521
1522         /*
1523          * If we failed or don't need to set the default TX key (below),
1524          * we're done here.
1525          */
1526         if (ret || !set_tx || alg == WPA_ALG_NONE)
1527                 return ret;
1528 #ifdef HOSTAPD /* FIX: is this needed? */
1529         if (addr)
1530                 return ret;
1531 #endif /* HOSTAPD */
1532
1533         msg = nlmsg_alloc();
1534         if (!msg)
1535                 return -ENOMEM;
1536
1537         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1538                     0, NL80211_CMD_SET_KEY, 0);
1539         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1540         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1541         if (alg == WPA_ALG_IGTK)
1542                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1543         else
1544                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1545
1546         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1547         if (ret == -ENOENT)
1548                 ret = 0;
1549         if (ret)
1550                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1551                            "err=%d %s)", ret, strerror(-ret));
1552         return ret;
1553
1554 nla_put_failure:
1555         return -ENOBUFS;
1556 }
1557
1558
1559 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1560                                       const u8 *addr, int key_idx,
1561                                       int set_tx, const u8 *seq,
1562                                       size_t seq_len,
1563                                       const u8 *key, size_t key_len)
1564 {
1565         struct wpa_driver_nl80211_data *drv = priv;
1566         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1567                            seq_len, key, key_len);
1568 }
1569
1570
1571 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1572                                    const u8 *addr, int cmd, u16 reason_code)
1573 {
1574         int ret = -1;
1575         struct nl_msg *msg;
1576
1577         msg = nlmsg_alloc();
1578         if (!msg)
1579                 return -1;
1580
1581         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1582
1583         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1584         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1585         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1586
1587         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1588         msg = NULL;
1589         if (ret) {
1590                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1591                            "(%s)", ret, strerror(-ret));
1592                 goto nla_put_failure;
1593         }
1594         ret = 0;
1595
1596 nla_put_failure:
1597         nlmsg_free(msg);
1598         return ret;
1599 }
1600
1601
1602 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1603                                              int reason_code)
1604 {
1605         struct wpa_driver_nl80211_data *drv = priv;
1606         wpa_printf(MSG_DEBUG, "%s", __func__);
1607         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1608                                        reason_code);
1609 }
1610
1611
1612 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1613                                            int reason_code)
1614 {
1615         struct wpa_driver_nl80211_data *drv = priv;
1616         wpa_printf(MSG_DEBUG, "%s", __func__);
1617         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1618                                        reason_code);
1619 }
1620
1621
1622 static int wpa_driver_nl80211_authenticate(
1623         void *priv, struct wpa_driver_auth_params *params)
1624 {
1625         struct wpa_driver_nl80211_data *drv = priv;
1626         int ret = -1, i;
1627         struct nl_msg *msg;
1628         enum nl80211_auth_type type;
1629
1630         drv->associated = 0;
1631
1632         msg = nlmsg_alloc();
1633         if (!msg)
1634                 return -1;
1635
1636         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1637                    drv->ifindex);
1638
1639         for (i = 0; i < 4; i++) {
1640                 if (!params->wep_key[i])
1641                         continue;
1642                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1643                                            i == params->wep_tx_keyidx, NULL, 0,
1644                                            params->wep_key[i],
1645                                            params->wep_key_len[i]);
1646         }
1647
1648         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1649                     NL80211_CMD_AUTHENTICATE, 0);
1650
1651         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1652         if (params->bssid) {
1653                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1654                            MAC2STR(params->bssid));
1655                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1656         }
1657         if (params->freq) {
1658                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1659                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1660         }
1661         if (params->ssid) {
1662                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1663                                   params->ssid, params->ssid_len);
1664                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1665                         params->ssid);
1666         }
1667         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1668         if (params->ie)
1669                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1670         /*
1671          * TODO: if multiple auth_alg options enabled, try them one by one if
1672          * the AP rejects authentication due to unknown auth alg
1673          */
1674         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1675                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1676         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1677                 type = NL80211_AUTHTYPE_SHARED_KEY;
1678         else if (params->auth_alg & AUTH_ALG_LEAP)
1679                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1680         else if (params->auth_alg & AUTH_ALG_FT)
1681                 type = NL80211_AUTHTYPE_FT;
1682         else
1683                 goto nla_put_failure;
1684         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1685         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1686
1687         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1688         msg = NULL;
1689         if (ret) {
1690                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1691                            "(%s)", ret, strerror(-ret));
1692                 goto nla_put_failure;
1693         }
1694         ret = 0;
1695         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1696                    "successfully");
1697
1698 nla_put_failure:
1699         nlmsg_free(msg);
1700         return ret;
1701 }
1702
1703
1704 #if defined(CONFIG_AP) || defined(HOSTAPD)
1705
1706 struct phy_info_arg {
1707         u16 *num_modes;
1708         struct hostapd_hw_modes *modes;
1709 };
1710
1711 static int phy_info_handler(struct nl_msg *msg, void *arg)
1712 {
1713         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1714         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1715         struct phy_info_arg *phy_info = arg;
1716
1717         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1718
1719         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1720         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1721                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1722                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1723                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1724                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1725                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1726                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1727         };
1728
1729         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1730         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1731                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1732                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1733         };
1734
1735         struct nlattr *nl_band;
1736         struct nlattr *nl_freq;
1737         struct nlattr *nl_rate;
1738         int rem_band, rem_freq, rem_rate;
1739         struct hostapd_hw_modes *mode;
1740         int idx, mode_is_set;
1741
1742         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1743                   genlmsg_attrlen(gnlh, 0), NULL);
1744
1745         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1746                 return NL_SKIP;
1747
1748         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1749                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1750                 if (!mode)
1751                         return NL_SKIP;
1752                 phy_info->modes = mode;
1753
1754                 mode_is_set = 0;
1755
1756                 mode = &phy_info->modes[*(phy_info->num_modes)];
1757                 memset(mode, 0, sizeof(*mode));
1758                 *(phy_info->num_modes) += 1;
1759
1760                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1761                           nla_len(nl_band), NULL);
1762
1763                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1764                         mode->ht_capab = nla_get_u16(
1765                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1766                 }
1767
1768                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1769                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1770                                   nla_len(nl_freq), freq_policy);
1771                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1772                                 continue;
1773                         mode->num_channels++;
1774                 }
1775
1776                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1777                 if (!mode->channels)
1778                         return NL_SKIP;
1779
1780                 idx = 0;
1781
1782                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1783                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1784                                   nla_len(nl_freq), freq_policy);
1785                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1786                                 continue;
1787
1788                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1789                         mode->channels[idx].flag = 0;
1790
1791                         if (!mode_is_set) {
1792                                 /* crude heuristic */
1793                                 if (mode->channels[idx].freq < 4000)
1794                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1795                                 else
1796                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1797                                 mode_is_set = 1;
1798                         }
1799
1800                         /* crude heuristic */
1801                         if (mode->channels[idx].freq < 4000)
1802                                 if (mode->channels[idx].freq == 2484)
1803                                         mode->channels[idx].chan = 14;
1804                                 else
1805                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1806                         else
1807                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1808
1809                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1810                                 mode->channels[idx].flag |=
1811                                         HOSTAPD_CHAN_DISABLED;
1812                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1813                                 mode->channels[idx].flag |=
1814                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1815                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1816                                 mode->channels[idx].flag |=
1817                                         HOSTAPD_CHAN_NO_IBSS;
1818                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1819                                 mode->channels[idx].flag |=
1820                                         HOSTAPD_CHAN_RADAR;
1821
1822                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1823                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1824                                 mode->channels[idx].max_tx_power =
1825                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1826
1827                         idx++;
1828                 }
1829
1830                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1831                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1832                                   nla_len(nl_rate), rate_policy);
1833                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1834                                 continue;
1835                         mode->num_rates++;
1836                 }
1837
1838                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1839                 if (!mode->rates)
1840                         return NL_SKIP;
1841
1842                 idx = 0;
1843
1844                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1845                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1846                                   nla_len(nl_rate), rate_policy);
1847                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1848                                 continue;
1849                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1850
1851                         /* crude heuristic */
1852                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1853                             mode->rates[idx].rate > 200)
1854                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1855
1856                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1857                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1858
1859                         idx++;
1860                 }
1861         }
1862
1863         return NL_SKIP;
1864 }
1865
1866 static struct hostapd_hw_modes *
1867 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1868 {
1869         u16 m;
1870         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1871         int i, mode11g_idx = -1;
1872
1873         /* If only 802.11g mode is included, use it to construct matching
1874          * 802.11b mode data. */
1875
1876         for (m = 0; m < *num_modes; m++) {
1877                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1878                         return modes; /* 802.11b already included */
1879                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1880                         mode11g_idx = m;
1881         }
1882
1883         if (mode11g_idx < 0)
1884                 return modes; /* 2.4 GHz band not supported at all */
1885
1886         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1887         if (nmodes == NULL)
1888                 return modes; /* Could not add 802.11b mode */
1889
1890         mode = &nmodes[*num_modes];
1891         os_memset(mode, 0, sizeof(*mode));
1892         (*num_modes)++;
1893         modes = nmodes;
1894
1895         mode->mode = HOSTAPD_MODE_IEEE80211B;
1896
1897         mode11g = &modes[mode11g_idx];
1898         mode->num_channels = mode11g->num_channels;
1899         mode->channels = os_malloc(mode11g->num_channels *
1900                                    sizeof(struct hostapd_channel_data));
1901         if (mode->channels == NULL) {
1902                 (*num_modes)--;
1903                 return modes; /* Could not add 802.11b mode */
1904         }
1905         os_memcpy(mode->channels, mode11g->channels,
1906                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
1907
1908         mode->num_rates = 0;
1909         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1910         if (mode->rates == NULL) {
1911                 os_free(mode->channels);
1912                 (*num_modes)--;
1913                 return modes; /* Could not add 802.11b mode */
1914         }
1915
1916         for (i = 0; i < mode11g->num_rates; i++) {
1917                 if (mode11g->rates[i].rate > 110 ||
1918                     mode11g->rates[i].flags &
1919                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1920                         continue;
1921                 mode->rates[mode->num_rates] = mode11g->rates[i];
1922                 mode->num_rates++;
1923                 if (mode->num_rates == 4)
1924                         break;
1925         }
1926
1927         if (mode->num_rates == 0) {
1928                 os_free(mode->channels);
1929                 os_free(mode->rates);
1930                 (*num_modes)--;
1931                 return modes; /* No 802.11b rates */
1932         }
1933
1934         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1935                    "information");
1936
1937         return modes;
1938 }
1939
1940
1941 static struct hostapd_hw_modes *
1942 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1943 {
1944         struct wpa_driver_nl80211_data *drv = priv;
1945         struct nl_msg *msg;
1946         struct phy_info_arg result = {
1947                 .num_modes = num_modes,
1948                 .modes = NULL,
1949         };
1950
1951         *num_modes = 0;
1952         *flags = 0;
1953
1954         msg = nlmsg_alloc();
1955         if (!msg)
1956                 return NULL;
1957
1958         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1959                     0, NL80211_CMD_GET_WIPHY, 0);
1960
1961         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1962
1963         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1964                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1965  nla_put_failure:
1966         return NULL;
1967 }
1968
1969
1970 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1971                                          const void *data, size_t len,
1972                                          int encrypt)
1973 {
1974         __u8 rtap_hdr[] = {
1975                 0x00, 0x00, /* radiotap version */
1976                 0x0e, 0x00, /* radiotap length */
1977                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1978                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1979                 0x00,       /* padding */
1980                 0x00, 0x00, /* RX and TX flags to indicate that */
1981                 0x00, 0x00, /* this is the injected frame directly */
1982         };
1983         struct iovec iov[2] = {
1984                 {
1985                         .iov_base = &rtap_hdr,
1986                         .iov_len = sizeof(rtap_hdr),
1987                 },
1988                 {
1989                         .iov_base = (void *) data,
1990                         .iov_len = len,
1991                 }
1992         };
1993         struct msghdr msg = {
1994                 .msg_name = NULL,
1995                 .msg_namelen = 0,
1996                 .msg_iov = iov,
1997                 .msg_iovlen = 2,
1998                 .msg_control = NULL,
1999                 .msg_controllen = 0,
2000                 .msg_flags = 0,
2001         };
2002
2003         if (encrypt)
2004                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2005
2006         return sendmsg(drv->monitor_sock, &msg, 0);
2007 }
2008
2009
2010 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2011                                         size_t data_len)
2012 {
2013         struct wpa_driver_nl80211_data *drv = priv;
2014         struct ieee80211_mgmt *mgmt;
2015         int do_not_encrypt = 0;
2016         u16 fc;
2017
2018         mgmt = (struct ieee80211_mgmt *) data;
2019         fc = le_to_host16(mgmt->frame_control);
2020
2021         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2022             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2023                 /*
2024                  * Only one of the authentication frame types is encrypted.
2025                  * In order for static WEP encryption to work properly (i.e.,
2026                  * to not encrypt the frame), we need to tell mac80211 about
2027                  * the frames that must not be encrypted.
2028                  */
2029                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2030                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2031                 if (auth_alg == WLAN_AUTH_OPEN ||
2032                     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2033                         do_not_encrypt = 1;
2034         }
2035
2036         return wpa_driver_nl80211_send_frame(drv, data, data_len,
2037                                              !do_not_encrypt);
2038 }
2039
2040
2041 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2042                                                const u8 *head, size_t head_len,
2043                                                const u8 *tail, size_t tail_len,
2044                                                int dtim_period)
2045 {
2046         struct wpa_driver_nl80211_data *drv = priv;
2047         struct nl_msg *msg;
2048         u8 cmd = NL80211_CMD_NEW_BEACON;
2049         int ret;
2050         int beacon_set;
2051 #ifdef HOSTAPD
2052         struct i802_bss *bss;
2053
2054         bss = get_bss(drv, ifindex);
2055         if (bss == NULL)
2056                 return -ENOENT;
2057         beacon_set = bss->beacon_set;
2058 #else /* HOSTAPD */
2059         beacon_set = drv->beacon_set;
2060 #endif /* HOSTAPD */
2061
2062         msg = nlmsg_alloc();
2063         if (!msg)
2064                 return -ENOMEM;
2065
2066         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2067                    beacon_set);
2068         if (beacon_set)
2069                 cmd = NL80211_CMD_SET_BEACON;
2070
2071         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2072                     0, cmd, 0);
2073         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2074         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2075         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2076         if (!drv->beacon_int)
2077                 drv->beacon_int = 100;
2078         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2079         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2080
2081         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2082         if (ret) {
2083                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2084                            ret, strerror(-ret));
2085         } else {
2086 #ifdef HOSTAPD
2087                 bss->beacon_set = 1;
2088 #else /* HOSTAPD */
2089                 drv->beacon_set = 1;
2090 #endif /* HOSTAPD */
2091         }
2092         return ret;
2093  nla_put_failure:
2094         return -ENOBUFS;
2095 }
2096
2097
2098 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2099 {
2100         struct wpa_driver_nl80211_data *drv = priv;
2101         struct nl_msg *msg;
2102
2103         drv->beacon_int = value;
2104
2105 #ifdef HOSTAPD
2106         if (!drv->bss.beacon_set)
2107                 return 0;
2108 #else /* HOSTAPD */
2109         if (!drv->beacon_set)
2110                 return 0;
2111 #endif /* HOSTAPD */
2112
2113         msg = nlmsg_alloc();
2114         if (!msg)
2115                 return -ENOMEM;
2116
2117         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2118         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2119                     0, NL80211_CMD_SET_BEACON, 0);
2120         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2121
2122         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2123
2124         return send_and_recv_msgs(drv, msg, NULL, NULL);
2125  nla_put_failure:
2126         return -ENOBUFS;
2127 }
2128
2129
2130 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2131                                        int freq, int ht_enabled,
2132                                        int sec_channel_offset)
2133 {
2134         struct nl_msg *msg;
2135         int ret;
2136
2137         msg = nlmsg_alloc();
2138         if (!msg)
2139                 return -1;
2140
2141         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2142                     NL80211_CMD_SET_WIPHY, 0);
2143
2144         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2145         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2146         if (ht_enabled) {
2147                 switch (sec_channel_offset) {
2148                 case -1:
2149                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2150                                     NL80211_CHAN_HT40MINUS);
2151                         break;
2152                 case 1:
2153                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2154                                     NL80211_CHAN_HT40PLUS);
2155                         break;
2156                 default:
2157                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2158                                     NL80211_CHAN_HT20);
2159                         break;
2160                 }
2161         }
2162
2163         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2164         if (ret == 0)
2165                 return 0;
2166         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2167                    "%d (%s)", freq, ret, strerror(-ret));
2168 nla_put_failure:
2169         return -1;
2170 }
2171
2172 #endif /* CONFIG_AP || HOSTAPD */
2173
2174
2175 #ifdef CONFIG_AP
2176
2177 static int wpa_driver_nl80211_set_beacon(void *priv,
2178                                          const u8 *head, size_t head_len,
2179                                          const u8 *tail, size_t tail_len,
2180                                          int dtim_period)
2181 {
2182         struct wpa_driver_nl80211_data *drv = priv;
2183         return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2184                                                    head, head_len,
2185                                                    tail, tail_len,
2186                                                    dtim_period);
2187 }
2188
2189 #endif /* CONFIG_AP */
2190
2191 #if defined(CONFIG_AP) || defined(HOSTAPD)
2192
2193 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2194                                  int ifidx)
2195 {
2196         struct nl_msg *msg;
2197
2198 #ifdef HOSTAPD
2199         /* stop listening for EAPOL on this interface */
2200         del_ifidx(drv, ifidx);
2201 #endif /* HOSTAPD */
2202
2203         msg = nlmsg_alloc();
2204         if (!msg)
2205                 goto nla_put_failure;
2206
2207         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2208                     0, NL80211_CMD_DEL_INTERFACE, 0);
2209         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2210
2211         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2212                 return;
2213  nla_put_failure:
2214         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2215                    ifidx);
2216 }
2217
2218
2219 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2220                                 const char *ifname, enum nl80211_iftype iftype,
2221                                 const u8 *addr)
2222 {
2223         struct nl_msg *msg, *flags = NULL;
2224         int ifidx;
2225         int ret = -ENOBUFS;
2226 #ifdef HOSTAPD
2227         struct ifreq ifreq;
2228         struct iwreq iwr;
2229 #endif /* HOSTAPD */
2230
2231         msg = nlmsg_alloc();
2232         if (!msg)
2233                 return -1;
2234
2235         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2236                     0, NL80211_CMD_NEW_INTERFACE, 0);
2237         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2238         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2239         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2240
2241         if (iftype == NL80211_IFTYPE_MONITOR) {
2242                 int err;
2243
2244                 flags = nlmsg_alloc();
2245                 if (!flags)
2246                         goto nla_put_failure;
2247
2248                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2249
2250                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2251
2252                 nlmsg_free(flags);
2253
2254                 if (err)
2255                         goto nla_put_failure;
2256         }
2257
2258         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2259         if (ret) {
2260  nla_put_failure:
2261                 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2262                            ifname);
2263                 return ret;
2264         }
2265
2266         ifidx = if_nametoindex(ifname);
2267
2268         if (ifidx <= 0)
2269                 return -1;
2270
2271 #ifdef HOSTAPD
2272         /* start listening for EAPOL on this interface */
2273         add_ifidx(drv, ifidx);
2274
2275         if (addr) {
2276                 switch (iftype) {
2277                 case NL80211_IFTYPE_AP:
2278                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
2279                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
2280                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2281
2282                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
2283                                 nl80211_remove_iface(drv, ifidx);
2284                                 return -1;
2285                         }
2286                         break;
2287                 case NL80211_IFTYPE_WDS:
2288                         memset(&iwr, 0, sizeof(iwr));
2289                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
2290                         iwr.u.addr.sa_family = ARPHRD_ETHER;
2291                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
2292                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
2293                                 return -1;
2294                         break;
2295                 default:
2296                         /* nothing */
2297                         break;
2298                 }
2299         }
2300 #endif /* HOSTAPD */
2301
2302         return ifidx;
2303 }
2304
2305 #endif /* CONFIG_AP || HOSTAPD */
2306
2307 #ifdef CONFIG_AP
2308
2309 void ap_tx_status(void *ctx, const u8 *addr,
2310                   const u8 *buf, size_t len, int ack);
2311 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2312 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2313                 struct hostapd_frame_info *fi);
2314 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2315
2316 #endif /* CONFIG_AP */
2317
2318 #if defined(CONFIG_AP) || defined(HOSTAPD)
2319
2320 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2321 {
2322         struct ieee80211_hdr *hdr;
2323         u16 fc, type, stype;
2324
2325         hdr = (struct ieee80211_hdr *) buf;
2326         fc = le_to_host16(hdr->frame_control);
2327
2328         type = WLAN_FC_GET_TYPE(fc);
2329         stype = WLAN_FC_GET_STYPE(fc);
2330
2331         switch (type) {
2332         case WLAN_FC_TYPE_MGMT:
2333                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2334                            ok ? "ACK" : "fail");
2335 #ifdef HOSTAPD
2336                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2337 #else /* HOSTAPD */
2338                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2339 #endif /* HOSTAPD */
2340                 break;
2341         case WLAN_FC_TYPE_CTRL:
2342                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2343                            ok ? "ACK" : "fail");
2344                 break;
2345         case WLAN_FC_TYPE_DATA:
2346 #ifdef HOSTAPD
2347                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2348 #else /* HOSTAPD */
2349                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2350 #endif /* HOSTAPD */
2351                 break;
2352         default:
2353                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2354                            type);
2355                 break;
2356         }
2357 }
2358
2359
2360 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2361                          u8 *buf, size_t len,
2362                          struct hostapd_frame_info *hfi,
2363                          enum ieee80211_msg_type msg_type)
2364 {
2365         struct ieee80211_hdr *hdr;
2366         u16 fc, type, stype;
2367         size_t data_len = len;
2368         u8 *bssid;
2369         void *ctx = drv->ctx;
2370 #ifdef HOSTAPD
2371         struct hostapd_iface *iface = drv->hapd->iface;
2372         struct hostapd_data *hapd = NULL;
2373         int broadcast_bssid = 0;
2374         size_t i;
2375 #endif /* HOSTAPD */
2376
2377         /*
2378          * PS-Poll frames are 16 bytes. All other frames are
2379          * 24 bytes or longer.
2380          */
2381         if (len < 16)
2382                 return;
2383
2384         hdr = (struct ieee80211_hdr *) buf;
2385         fc = le_to_host16(hdr->frame_control);
2386
2387         type = WLAN_FC_GET_TYPE(fc);
2388         stype = WLAN_FC_GET_STYPE(fc);
2389
2390         switch (type) {
2391         case WLAN_FC_TYPE_DATA:
2392                 if (len < 24)
2393                         return;
2394                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2395                 case WLAN_FC_TODS:
2396                         bssid = hdr->addr1;
2397                         break;
2398                 case WLAN_FC_FROMDS:
2399                         bssid = hdr->addr2;
2400                         break;
2401                 default:
2402                         /* discard */
2403                         return;
2404                 }
2405                 break;
2406         case WLAN_FC_TYPE_CTRL:
2407                 /* discard non-ps-poll frames */
2408                 if (stype != WLAN_FC_STYPE_PSPOLL)
2409                         return;
2410                 bssid = hdr->addr1;
2411                 break;
2412         case WLAN_FC_TYPE_MGMT:
2413                 bssid = hdr->addr3;
2414                 break;
2415         default:
2416                 /* discard */
2417                 return;
2418         }
2419
2420 #ifdef HOSTAPD
2421         /* find interface frame belongs to */
2422         for (i = 0; i < iface->num_bss; i++) {
2423                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
2424                         hapd = iface->bss[i];
2425                         break;
2426                 }
2427         }
2428
2429         if (hapd == NULL) {
2430                 hapd = iface->bss[0];
2431
2432                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
2433                     bssid[2] != 0xff || bssid[3] != 0xff ||
2434                     bssid[4] != 0xff || bssid[5] != 0xff) {
2435                         /*
2436                          * Unknown BSSID - drop frame if this is not from
2437                          * passive scanning or a beacon (at least ProbeReq
2438                          * frames to other APs may be allowed through RX
2439                          * filtering in the wlan hw/driver)
2440                          */
2441                         if ((type != WLAN_FC_TYPE_MGMT ||
2442                              stype != WLAN_FC_STYPE_BEACON))
2443                                 return;
2444                 } else
2445                         broadcast_bssid = 1;
2446         }
2447         ctx = hapd;
2448 #endif /* HOSTAPD */
2449
2450         switch (msg_type) {
2451         case ieee80211_msg_normal:
2452                 /* continue processing */
2453                 break;
2454         case ieee80211_msg_tx_callback_ack:
2455                 handle_tx_callback(ctx, buf, data_len, 1);
2456                 return;
2457         case ieee80211_msg_tx_callback_fail:
2458                 handle_tx_callback(ctx, buf, data_len, 0);
2459                 return;
2460         }
2461
2462         switch (type) {
2463         case WLAN_FC_TYPE_MGMT:
2464                 if (stype != WLAN_FC_STYPE_BEACON &&
2465                     stype != WLAN_FC_STYPE_PROBE_REQ)
2466                         wpa_printf(MSG_MSGDUMP, "MGMT");
2467 #ifdef HOSTAPD
2468                 if (broadcast_bssid) {
2469                         for (i = 0; i < iface->num_bss; i++)
2470                                 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
2471                                                 stype, hfi);
2472                 } else
2473                         hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
2474 #else /* HOSTAPD */
2475                 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2476 #endif /* HOSTAPD */
2477                 break;
2478         case WLAN_FC_TYPE_CTRL:
2479                 /* can only get here with PS-Poll frames */
2480                 wpa_printf(MSG_DEBUG, "CTRL");
2481 #ifdef HOSTAPD
2482                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
2483 #else /* HOSTAPD */
2484                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2485 #endif /* HOSTAPD */
2486                 break;
2487         case WLAN_FC_TYPE_DATA:
2488 #ifdef HOSTAPD
2489                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
2490 #else /* HOSTAPD */
2491                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2492 #endif /* HOSTAPD */
2493                 break;
2494         }
2495 }
2496
2497
2498 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2499 {
2500         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2501         int len;
2502         unsigned char buf[3000];
2503         struct ieee80211_radiotap_iterator iter;
2504         int ret;
2505         struct hostapd_frame_info hfi;
2506         int injected = 0, failed = 0, msg_type, rxflags = 0;
2507
2508         len = recv(sock, buf, sizeof(buf), 0);
2509         if (len < 0) {
2510                 perror("recv");
2511                 return;
2512         }
2513
2514         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2515                 printf("received invalid radiotap frame\n");
2516                 return;
2517         }
2518
2519         memset(&hfi, 0, sizeof(hfi));
2520
2521         while (1) {
2522                 ret = ieee80211_radiotap_iterator_next(&iter);
2523                 if (ret == -ENOENT)
2524                         break;
2525                 if (ret) {
2526                         printf("received invalid radiotap frame (%d)\n", ret);
2527                         return;
2528                 }
2529                 switch (iter.this_arg_index) {
2530                 case IEEE80211_RADIOTAP_FLAGS:
2531                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2532                                 len -= 4;
2533                         break;
2534                 case IEEE80211_RADIOTAP_RX_FLAGS:
2535                         rxflags = 1;
2536                         break;
2537                 case IEEE80211_RADIOTAP_TX_FLAGS:
2538                         injected = 1;
2539                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2540                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2541                         break;
2542                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2543                         break;
2544                 case IEEE80211_RADIOTAP_CHANNEL:
2545                         /* TODO convert from freq/flags to channel number
2546                         hfi.channel = XXX;
2547                         hfi.phytype = XXX;
2548                          */
2549                         break;
2550                 case IEEE80211_RADIOTAP_RATE:
2551                         hfi.datarate = *iter.this_arg * 5;
2552                         break;
2553                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2554                         hfi.ssi_signal = *iter.this_arg;
2555                         break;
2556                 }
2557         }
2558
2559         if (rxflags && injected)
2560                 return;
2561
2562         if (!injected)
2563                 msg_type = ieee80211_msg_normal;
2564         else if (failed)
2565                 msg_type = ieee80211_msg_tx_callback_fail;
2566         else
2567                 msg_type = ieee80211_msg_tx_callback_ack;
2568
2569         handle_frame(drv, buf + iter.max_length,
2570                      len - iter.max_length, &hfi, msg_type);
2571 }
2572
2573
2574 /*
2575  * we post-process the filter code later and rewrite
2576  * this to the offset to the last instruction
2577  */
2578 #define PASS    0xFF
2579 #define FAIL    0xFE
2580
2581 static struct sock_filter msock_filter_insns[] = {
2582         /*
2583          * do a little-endian load of the radiotap length field
2584          */
2585         /* load lower byte into A */
2586         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2587         /* put it into X (== index register) */
2588         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2589         /* load upper byte into A */
2590         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2591         /* left-shift it by 8 */
2592         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2593         /* or with X */
2594         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2595         /* put result into X */
2596         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2597
2598         /*
2599          * Allow management frames through, this also gives us those
2600          * management frames that we sent ourselves with status
2601          */
2602         /* load the lower byte of the IEEE 802.11 frame control field */
2603         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2604         /* mask off frame type and version */
2605         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2606         /* accept frame if it's both 0, fall through otherwise */
2607         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2608
2609         /*
2610          * TODO: add a bit to radiotap RX flags that indicates
2611          * that the sending station is not associated, then
2612          * add a filter here that filters on our DA and that flag
2613          * to allow us to deauth frames to that bad station.
2614          *
2615          * Not a regression -- we didn't do it before either.
2616          */
2617
2618 #if 0
2619         /*
2620          * drop non-data frames, WDS frames
2621          */
2622         /* load the lower byte of the frame control field */
2623         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2624         /* mask off QoS bit */
2625         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2626         /* drop non-data frames */
2627         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2628         /* load the upper byte of the frame control field */
2629         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2630         /* mask off toDS/fromDS */
2631         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2632         /* drop WDS frames */
2633         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2634 #endif
2635
2636         /*
2637          * add header length to index
2638          */
2639         /* load the lower byte of the frame control field */
2640         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2641         /* mask off QoS bit */
2642         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2643         /* right shift it by 6 to give 0 or 2 */
2644         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2645         /* add data frame header length */
2646         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2647         /* add index, was start of 802.11 header */
2648         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2649         /* move to index, now start of LL header */
2650         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2651
2652         /*
2653          * Accept empty data frames, we use those for
2654          * polling activity.
2655          */
2656         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2657         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2658
2659         /*
2660          * Accept EAPOL frames
2661          */
2662         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2663         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2664         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2665         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2666
2667         /* keep these last two statements or change the code below */
2668         /* return 0 == "DROP" */
2669         BPF_STMT(BPF_RET | BPF_K, 0),
2670         /* return ~0 == "keep all" */
2671         BPF_STMT(BPF_RET | BPF_K, ~0),
2672 };
2673
2674 static struct sock_fprog msock_filter = {
2675         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2676         .filter = msock_filter_insns,
2677 };
2678
2679
2680 static int add_monitor_filter(int s)
2681 {
2682         int idx;
2683
2684         /* rewrite all PASS/FAIL jump offsets */
2685         for (idx = 0; idx < msock_filter.len; idx++) {
2686                 struct sock_filter *insn = &msock_filter_insns[idx];
2687
2688                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2689                         if (insn->code == (BPF_JMP|BPF_JA)) {
2690                                 if (insn->k == PASS)
2691                                         insn->k = msock_filter.len - idx - 2;
2692                                 else if (insn->k == FAIL)
2693                                         insn->k = msock_filter.len - idx - 3;
2694                         }
2695
2696                         if (insn->jt == PASS)
2697                                 insn->jt = msock_filter.len - idx - 2;
2698                         else if (insn->jt == FAIL)
2699                                 insn->jt = msock_filter.len - idx - 3;
2700
2701                         if (insn->jf == PASS)
2702                                 insn->jf = msock_filter.len - idx - 2;
2703                         else if (insn->jf == FAIL)
2704                                 insn->jf = msock_filter.len - idx - 3;
2705                 }
2706         }
2707
2708         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2709                        &msock_filter, sizeof(msock_filter))) {
2710                 perror("SO_ATTACH_FILTER");
2711                 return -1;
2712         }
2713
2714         return 0;
2715 }
2716
2717
2718 static int
2719 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2720 {
2721         char buf[IFNAMSIZ];
2722         struct sockaddr_ll ll;
2723         int optval;
2724         socklen_t optlen;
2725
2726         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2727         buf[IFNAMSIZ - 1] = '\0';
2728
2729         drv->monitor_ifidx =
2730                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2731
2732         if (drv->monitor_ifidx < 0)
2733                 return -1;
2734
2735         if (hostapd_set_iface_flags(drv, buf, 1))
2736                 goto error;
2737
2738         memset(&ll, 0, sizeof(ll));
2739         ll.sll_family = AF_PACKET;
2740         ll.sll_ifindex = drv->monitor_ifidx;
2741         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2742         if (drv->monitor_sock < 0) {
2743                 perror("socket[PF_PACKET,SOCK_RAW]");
2744                 goto error;
2745         }
2746
2747         if (add_monitor_filter(drv->monitor_sock)) {
2748                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2749                            "interface; do filtering in user space");
2750                 /* This works, but will cost in performance. */
2751         }
2752
2753         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2754                 perror("monitor socket bind");
2755                 goto error;
2756         }
2757
2758         optlen = sizeof(optval);
2759         optval = 20;
2760         if (setsockopt
2761             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2762                 perror("Failed to set socket priority");
2763                 goto error;
2764         }
2765
2766         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2767                                      drv, NULL)) {
2768                 printf("Could not register monitor read socket\n");
2769                 goto error;
2770         }
2771
2772         return 0;
2773  error:
2774         nl80211_remove_iface(drv, drv->monitor_ifidx);
2775         return -1;
2776 }
2777
2778 #endif /* CONFIG_AP || HOSTAPD */
2779
2780 #ifdef CONFIG_AP
2781
2782 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2783                                  struct wpa_driver_associate_params *params)
2784 {
2785         if (drv->monitor_ifidx < 0 &&
2786             nl80211_create_monitor_interface(drv))
2787                 return -1;
2788
2789         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2790             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
2791                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2792                 drv->monitor_ifidx = -1;
2793                 return -1;
2794         }
2795
2796         /* TODO: setup monitor interface (and add code somewhere to remove this
2797          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2798
2799         return 0;
2800 }
2801 #endif /* CONFIG_AP */
2802
2803
2804 static int wpa_driver_nl80211_associate(
2805         void *priv, struct wpa_driver_associate_params *params)
2806 {
2807         struct wpa_driver_nl80211_data *drv = priv;
2808         int ret = -1;
2809         struct nl_msg *msg;
2810
2811 #ifdef CONFIG_AP
2812         if (params->mode == 2)
2813                 return wpa_driver_nl80211_ap(drv, params);
2814 #endif /* CONFIG_AP */
2815
2816         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2817                                           params->drop_unencrypted);
2818
2819         drv->associated = 0;
2820
2821         msg = nlmsg_alloc();
2822         if (!msg)
2823                 return -1;
2824
2825         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2826                    drv->ifindex);
2827         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2828                     NL80211_CMD_ASSOCIATE, 0);
2829
2830         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2831         if (params->bssid) {
2832                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2833                            MAC2STR(params->bssid));
2834                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2835         }
2836         if (params->freq) {
2837                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2838                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2839         }
2840         if (params->ssid) {
2841                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2842                                   params->ssid, params->ssid_len);
2843                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2844                         params->ssid);
2845                 if (params->ssid_len > sizeof(drv->ssid))
2846                         goto nla_put_failure;
2847                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2848                 drv->ssid_len = params->ssid_len;
2849         }
2850         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
2851         if (params->wpa_ie)
2852                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2853                         params->wpa_ie);
2854
2855         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2856         msg = NULL;
2857         if (ret) {
2858                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2859                            "(%s)", ret, strerror(-ret));
2860                 goto nla_put_failure;
2861         }
2862         ret = 0;
2863         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2864                    "successfully");
2865
2866 nla_put_failure:
2867         nlmsg_free(msg);
2868         return ret;
2869 }
2870
2871
2872 /**
2873  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2874  * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2875  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2876  * Returns: 0 on success, -1 on failure
2877  */
2878 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2879                                        int mode)
2880 {
2881         int ret = -1;
2882         struct nl_msg *msg;
2883         int nlmode;
2884
2885         switch (mode) {
2886         case 0:
2887                 nlmode = NL80211_IFTYPE_STATION;
2888                 break;
2889         case 1:
2890                 nlmode = NL80211_IFTYPE_ADHOC;
2891                 break;
2892         case 2:
2893                 nlmode = NL80211_IFTYPE_AP;
2894                 break;
2895         default:
2896                 return -1;
2897         }
2898
2899         msg = nlmsg_alloc();
2900         if (!msg)
2901                 return -1;
2902
2903         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2904                     0, NL80211_CMD_SET_INTERFACE, 0);
2905         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2906         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2907
2908         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2909         if (!ret)
2910                 return 0;
2911         else
2912                 goto try_again;
2913
2914 nla_put_failure:
2915         wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2916                    ret, strerror(-ret));
2917         return -1;
2918
2919 try_again:
2920         /* mac80211 doesn't allow mode changes while the device is up, so
2921          * take the device down, try to set the mode again, and bring the
2922          * device back up.
2923          */
2924         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2925                 /* Try to set the mode again while the interface is down */
2926                 msg = nlmsg_alloc();
2927                 if (!msg)
2928                         return -1;
2929
2930                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2931                             0, NL80211_CMD_SET_INTERFACE, 0);
2932                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2933                 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2934                 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2935                 if (ret) {
2936                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
2937                                    "mode(try_again): %d (%s)",
2938                                    drv->ifname, ret, strerror(-ret));
2939                 }
2940
2941                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2942                         ret = -1;
2943         }
2944
2945         return ret;
2946 }
2947
2948
2949 static int wpa_driver_nl80211_get_capa(void *priv,
2950                                        struct wpa_driver_capa *capa)
2951 {
2952         struct wpa_driver_nl80211_data *drv = priv;
2953         if (!drv->has_capability)
2954                 return -1;
2955         os_memcpy(capa, &drv->capa, sizeof(*capa));
2956         return 0;
2957 }
2958
2959
2960 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2961 {
2962         struct wpa_driver_nl80211_data *drv = priv;
2963
2964         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2965                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2966         drv->operstate = state;
2967         return wpa_driver_nl80211_send_oper_ifla(
2968                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2969 }
2970
2971
2972 #ifdef HOSTAPD
2973
2974 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2975
2976 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2977 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2978
2979
2980 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2981                                  int ifindex)
2982 {
2983         struct i802_bss *bss = &drv->bss;
2984         while (bss) {
2985                 if (ifindex == bss->ifindex)
2986                         return bss;
2987                 bss = bss->next;
2988         }
2989         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
2990         return NULL;
2991 }
2992
2993
2994 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2995 {
2996         int i;
2997         int *old;
2998
2999         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3000                    ifidx);
3001         for (i = 0; i < drv->num_if_indices; i++) {
3002                 if (drv->if_indices[i] == 0) {
3003                         drv->if_indices[i] = ifidx;
3004                         return;
3005                 }
3006         }
3007
3008         if (drv->if_indices != drv->default_if_indices)
3009                 old = drv->if_indices;
3010         else
3011                 old = NULL;
3012
3013         drv->if_indices = realloc(old,
3014                                   sizeof(int) * (drv->num_if_indices + 1));
3015         if (!drv->if_indices) {
3016                 if (!old)
3017                         drv->if_indices = drv->default_if_indices;
3018                 else
3019                         drv->if_indices = old;
3020                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3021                            "interfaces");
3022                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3023                 return;
3024         }
3025         drv->if_indices[drv->num_if_indices] = ifidx;
3026         drv->num_if_indices++;
3027 }
3028
3029
3030 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3031 {
3032         int i;
3033
3034         for (i = 0; i < drv->num_if_indices; i++) {
3035                 if (drv->if_indices[i] == ifidx) {
3036                         drv->if_indices[i] = 0;
3037                         break;
3038                 }
3039         }
3040 }
3041
3042
3043 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3044 {
3045         int i;
3046
3047         for (i = 0; i < drv->num_if_indices; i++)
3048                 if (drv->if_indices[i] == ifidx)
3049                         return 1;
3050
3051         return 0;
3052 }
3053
3054
3055 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3056                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3057                         size_t seq_len, const u8 *key, size_t key_len)
3058 {
3059         struct wpa_driver_nl80211_data *drv = priv;
3060         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3061                            set_tx, seq, seq_len, key, key_len);
3062 }
3063
3064
3065 static inline int min_int(int a, int b)
3066 {
3067         if (a < b)
3068                 return a;
3069         return b;
3070 }
3071
3072
3073 static int get_key_handler(struct nl_msg *msg, void *arg)
3074 {
3075         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3076         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3077
3078         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3079                   genlmsg_attrlen(gnlh, 0), NULL);
3080
3081         /*
3082          * TODO: validate the key index and mac address!
3083          * Otherwise, there's a race condition as soon as
3084          * the kernel starts sending key notifications.
3085          */
3086
3087         if (tb[NL80211_ATTR_KEY_SEQ])
3088                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3089                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3090         return NL_SKIP;
3091 }
3092
3093
3094 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3095                            int idx, u8 *seq)
3096 {
3097         struct wpa_driver_nl80211_data *drv = priv;
3098         struct nl_msg *msg;
3099
3100         msg = nlmsg_alloc();
3101         if (!msg)
3102                 return -ENOMEM;
3103
3104         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3105                     0, NL80211_CMD_GET_KEY, 0);
3106
3107         if (addr)
3108                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3109         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3110         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3111
3112         memset(seq, 0, 6);
3113
3114         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3115  nla_put_failure:
3116         return -ENOBUFS;
3117 }
3118
3119
3120 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3121                               int mode)
3122 {
3123         struct wpa_driver_nl80211_data *drv = priv;
3124         struct nl_msg *msg;
3125         u8 rates[NL80211_MAX_SUPP_RATES];
3126         u8 rates_len = 0;
3127         int i;
3128
3129         msg = nlmsg_alloc();
3130         if (!msg)
3131                 return -ENOMEM;
3132
3133         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3134                     NL80211_CMD_SET_BSS, 0);
3135
3136         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3137                 rates[rates_len++] = basic_rates[i] / 5;
3138
3139         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3140
3141         /* TODO: multi-BSS support */
3142         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3143
3144         return send_and_recv_msgs(drv, msg, NULL, NULL);
3145  nla_put_failure:
3146         return -ENOBUFS;
3147 }
3148
3149
3150 /* Set kernel driver on given frequency (MHz) */
3151 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3152 {
3153         struct wpa_driver_nl80211_data *drv = priv;
3154         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3155                                            freq->sec_channel_offset);
3156 }
3157
3158
3159 static int i802_set_rts(void *priv, int rts)
3160 {
3161         struct wpa_driver_nl80211_data *drv = priv;
3162         struct iwreq iwr;
3163
3164         memset(&iwr, 0, sizeof(iwr));
3165         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3166         iwr.u.rts.value = rts;
3167         iwr.u.rts.fixed = 1;
3168
3169         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3170                 perror("ioctl[SIOCSIWRTS]");
3171                 return -1;
3172         }
3173
3174         return 0;
3175 }
3176
3177
3178 static int i802_set_frag(void *priv, int frag)
3179 {
3180         struct wpa_driver_nl80211_data *drv = priv;
3181         struct iwreq iwr;
3182
3183         memset(&iwr, 0, sizeof(iwr));
3184         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3185         iwr.u.frag.value = frag;
3186         iwr.u.frag.fixed = 1;
3187
3188         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3189                 perror("ioctl[SIOCSIWFRAG]");
3190                 return -1;
3191         }
3192
3193         return 0;
3194 }
3195
3196
3197 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3198 {
3199         struct wpa_driver_nl80211_data *drv = priv;
3200         struct iwreq iwr;
3201
3202         memset(&iwr, 0, sizeof(iwr));
3203         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3204
3205         iwr.u.retry.value = short_retry;
3206         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3207         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3208                 perror("ioctl[SIOCSIWRETRY(short)]");
3209                 return -1;
3210         }
3211
3212         iwr.u.retry.value = long_retry;
3213         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3214         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3215                 perror("ioctl[SIOCSIWRETRY(long)]");
3216                 return -1;
3217         }
3218
3219         return 0;
3220 }
3221
3222
3223 static int i802_flush(void *priv)
3224 {
3225         struct wpa_driver_nl80211_data *drv = priv;
3226         struct nl_msg *msg;
3227
3228         msg = nlmsg_alloc();
3229         if (!msg)
3230                 return -1;
3231
3232         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3233                     0, NL80211_CMD_DEL_STATION, 0);
3234
3235         /*
3236          * XXX: FIX! this needs to flush all VLANs too
3237          */
3238         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3239                     if_nametoindex(drv->ifname));
3240
3241         return send_and_recv_msgs(drv, msg, NULL, NULL);
3242  nla_put_failure:
3243         return -ENOBUFS;
3244 }
3245
3246
3247 static int get_sta_handler(struct nl_msg *msg, void *arg)
3248 {
3249         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3250         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3251         struct hostap_sta_driver_data *data = arg;
3252         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3253         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3254                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3255                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3256                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3257                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3258                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3259         };
3260
3261         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3262                   genlmsg_attrlen(gnlh, 0), NULL);
3263
3264         /*
3265          * TODO: validate the interface and mac address!
3266          * Otherwise, there's a race condition as soon as
3267          * the kernel starts sending station notifications.
3268          */
3269
3270         if (!tb[NL80211_ATTR_STA_INFO]) {
3271                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3272                 return NL_SKIP;
3273         }
3274         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3275                              tb[NL80211_ATTR_STA_INFO],
3276                              stats_policy)) {
3277                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3278                 return NL_SKIP;
3279         }
3280
3281         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3282                 data->inactive_msec =
3283                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3284         if (stats[NL80211_STA_INFO_RX_BYTES])
3285                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3286         if (stats[NL80211_STA_INFO_TX_BYTES])
3287                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3288         if (stats[NL80211_STA_INFO_RX_PACKETS])
3289                 data->rx_packets =
3290                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3291         if (stats[NL80211_STA_INFO_TX_PACKETS])
3292                 data->tx_packets =
3293                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3294
3295         return NL_SKIP;
3296 }
3297
3298 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3299                               const u8 *addr)
3300 {
3301         struct wpa_driver_nl80211_data *drv = priv;
3302         struct nl_msg *msg;
3303
3304         os_memset(data, 0, sizeof(*data));
3305         msg = nlmsg_alloc();
3306         if (!msg)
3307                 return -ENOMEM;
3308
3309         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3310                     0, NL80211_CMD_GET_STATION, 0);
3311
3312         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3313         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3314
3315         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3316  nla_put_failure:
3317         return -ENOBUFS;
3318 }
3319
3320
3321 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3322                            size_t data_len, int encrypt, const u8 *own_addr)
3323 {
3324         struct wpa_driver_nl80211_data *drv = priv;
3325         struct ieee80211_hdr *hdr;
3326         size_t len;
3327         u8 *pos;
3328         int res;
3329 #if 0 /* FIX */
3330         int qos = sta->flags & WLAN_STA_WME;
3331 #else
3332         int qos = 0;
3333 #endif
3334
3335         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3336                 data_len;
3337         hdr = os_zalloc(len);
3338         if (hdr == NULL) {
3339                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3340                        (unsigned long) len);
3341                 return -1;
3342         }
3343
3344         hdr->frame_control =
3345                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3346         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3347         if (encrypt)
3348                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3349 #if 0 /* To be enabled if qos determination is added above */
3350         if (qos) {
3351                 hdr->frame_control |=
3352                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3353         }
3354 #endif
3355
3356         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3357         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3358         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3359         pos = (u8 *) (hdr + 1);
3360
3361 #if 0 /* To be enabled if qos determination is added above */
3362         if (qos) {
3363                 /* add an empty QoS header if needed */
3364                 pos[0] = 0;
3365                 pos[1] = 0;
3366                 pos += 2;
3367         }
3368 #endif
3369
3370         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3371         pos += sizeof(rfc1042_header);
3372         WPA_PUT_BE16(pos, ETH_P_PAE);
3373         pos += 2;
3374         memcpy(pos, data, data_len);
3375
3376         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3377         if (res < 0) {
3378                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3379                            "failed: %d (%s)",
3380                            (unsigned long) len, errno, strerror(errno));
3381         }
3382         free(hdr);
3383
3384         return res;
3385 }
3386
3387
3388 static int i802_sta_add(const char *ifname, void *priv,
3389                         struct hostapd_sta_add_params *params)
3390 {
3391         struct wpa_driver_nl80211_data *drv = priv;
3392         struct nl_msg *msg;
3393         int ret = -ENOBUFS;
3394
3395         msg = nlmsg_alloc();
3396         if (!msg)
3397                 return -ENOMEM;
3398
3399         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3400                     0, NL80211_CMD_NEW_STATION, 0);
3401
3402         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3403                     if_nametoindex(drv->ifname));
3404         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3405         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3406         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3407                 params->supp_rates);
3408         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3409                     params->listen_interval);
3410
3411 #ifdef CONFIG_IEEE80211N
3412         if (params->ht_capabilities) {
3413                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3414                         params->ht_capabilities->length,
3415                         &params->ht_capabilities->data);
3416         }
3417 #endif /* CONFIG_IEEE80211N */
3418
3419         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3420         if (ret)
3421                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3422                            "result: %d (%s)", ret, strerror(-ret));
3423         if (ret == -EEXIST)
3424                 ret = 0;
3425  nla_put_failure:
3426         return ret;
3427 }
3428
3429
3430 static int i802_sta_remove(void *priv, const u8 *addr)
3431 {
3432         struct wpa_driver_nl80211_data *drv = priv;
3433         struct nl_msg *msg;
3434         int ret;
3435
3436         msg = nlmsg_alloc();
3437         if (!msg)
3438                 return -ENOMEM;
3439
3440         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3441                     0, NL80211_CMD_DEL_STATION, 0);
3442
3443         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3444                     if_nametoindex(drv->ifname));
3445         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3446
3447         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3448         if (ret == -ENOENT)
3449                 return 0;
3450         return ret;
3451  nla_put_failure:
3452         return -ENOBUFS;
3453 }
3454
3455
3456 static int i802_sta_set_flags(void *priv, const u8 *addr,
3457                               int total_flags, int flags_or, int flags_and)
3458 {
3459         struct wpa_driver_nl80211_data *drv = priv;
3460         struct nl_msg *msg, *flags = NULL;
3461
3462         msg = nlmsg_alloc();
3463         if (!msg)
3464                 return -ENOMEM;
3465
3466         flags = nlmsg_alloc();
3467         if (!flags) {
3468                 nlmsg_free(msg);
3469                 return -ENOMEM;
3470         }
3471
3472         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3473                     0, NL80211_CMD_SET_STATION, 0);
3474
3475         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3476                     if_nametoindex(drv->ifname));
3477         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3478
3479         if (total_flags & WLAN_STA_AUTHORIZED)
3480                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3481
3482         if (total_flags & WLAN_STA_WMM)
3483                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3484
3485         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3486                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3487
3488         if (total_flags & WLAN_STA_MFP)
3489                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3490
3491         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3492                 goto nla_put_failure;
3493
3494         nlmsg_free(flags);
3495
3496         return send_and_recv_msgs(drv, msg, NULL, NULL);
3497  nla_put_failure:
3498         nlmsg_free(flags);
3499         return -ENOBUFS;
3500 }
3501
3502
3503 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3504                                     int cw_min, int cw_max, int burst_time)
3505 {
3506         struct wpa_driver_nl80211_data *drv = priv;
3507         struct nl_msg *msg;
3508         struct nlattr *txq, *params;
3509
3510         msg = nlmsg_alloc();
3511         if (!msg)
3512                 return -1;
3513
3514         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3515                     0, NL80211_CMD_SET_WIPHY, 0);
3516
3517         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3518
3519         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3520         if (!txq)
3521                 goto nla_put_failure;
3522
3523         /* We are only sending parameters for a single TXQ at a time */
3524         params = nla_nest_start(msg, 1);
3525         if (!params)
3526                 goto nla_put_failure;
3527
3528         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3529         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3530          * 32 usec, so need to convert the value here. */
3531         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3532         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3533         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3534         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3535
3536         nla_nest_end(msg, params);
3537
3538         nla_nest_end(msg, txq);
3539
3540         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3541                 return 0;
3542  nla_put_failure:
3543         return -1;
3544 }
3545
3546
3547 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3548 {
3549         struct wpa_driver_nl80211_data *drv = priv;
3550         int ifidx;
3551         struct i802_bss *bss;
3552
3553         bss = os_zalloc(sizeof(*bss));
3554         if (bss == NULL)
3555                 return -1;
3556         bss->ifindex = if_nametoindex(ifname);
3557
3558         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3559         if (ifidx < 0) {
3560                 os_free(bss);
3561                 return -1;
3562         }
3563         if (hostapd_set_iface_flags(priv, ifname, 1)) {
3564                 nl80211_remove_iface(priv, ifidx);
3565                 os_free(bss);
3566                 return -1;
3567         }
3568         bss->next = drv->bss.next;
3569         drv->bss.next = bss;
3570         return 0;
3571 }
3572
3573
3574 static int i802_bss_remove(void *priv, const char *ifname)
3575 {
3576         struct wpa_driver_nl80211_data *drv = priv;
3577         struct i802_bss *bss, *prev;
3578         int ifindex = if_nametoindex(ifname);
3579         nl80211_remove_iface(priv, ifindex);
3580         prev = &drv->bss;
3581         bss = drv->bss.next;
3582         while (bss) {
3583                 if (ifindex == bss->ifindex) {
3584                         prev->next = bss->next;
3585                         os_free(bss);
3586                         break;
3587                 }
3588                 prev = bss;
3589                 bss = bss->next;
3590         }
3591         return 0;
3592 }
3593
3594
3595 static int i802_set_beacon(const char *iface, void *priv,
3596                            const u8 *head, size_t head_len,
3597                            const u8 *tail, size_t tail_len, int dtim_period)
3598 {
3599         return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3600                                                    head, head_len,
3601                                                    tail, tail_len,
3602                                                    dtim_period);
3603 }
3604
3605
3606 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3607 {
3608         struct nl_msg *msg;
3609
3610         msg = nlmsg_alloc();
3611         if (!msg)
3612                 return -ENOMEM;
3613
3614         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3615                     0, NL80211_CMD_DEL_BEACON, 0);
3616         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3617
3618         return send_and_recv_msgs(drv, msg, NULL, NULL);
3619  nla_put_failure:
3620         return -ENOBUFS;
3621 }
3622
3623
3624 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3625 {
3626         struct wpa_driver_nl80211_data *drv = priv;
3627         struct nl_msg *msg;
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, 0,
3634                     NL80211_CMD_SET_BSS, 0);
3635
3636         if (cts >= 0)
3637                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3638         if (preamble >= 0)
3639                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3640         if (slot >= 0)
3641                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3642
3643         /* TODO: multi-BSS support */
3644         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3645
3646         return send_and_recv_msgs(drv, msg, NULL, NULL);
3647  nla_put_failure:
3648         return -ENOBUFS;
3649 }
3650
3651
3652 static int i802_set_cts_protect(void *priv, int value)
3653 {
3654         return i802_set_bss(priv, value, -1, -1);
3655 }
3656
3657
3658 static int i802_set_preamble(void *priv, int value)
3659 {
3660         return i802_set_bss(priv, -1, value, -1);
3661 }
3662
3663
3664 static int i802_set_short_slot_time(void *priv, int value)
3665 {
3666         return i802_set_bss(priv, -1, -1, value);
3667 }
3668
3669
3670 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3671 {
3672         switch (type) {
3673         case HOSTAPD_IF_VLAN:
3674                 return NL80211_IFTYPE_AP_VLAN;
3675         case HOSTAPD_IF_WDS:
3676                 return NL80211_IFTYPE_WDS;
3677         }
3678         return -1;
3679 }
3680
3681
3682 static int i802_if_add(const char *iface, void *priv,
3683                        enum hostapd_driver_if_type type, char *ifname,
3684                        const u8 *addr)
3685 {
3686         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3687                 return -1;
3688         return 0;
3689 }
3690
3691
3692 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3693                           char *ifname, const u8 *addr)
3694 {
3695         /* unused at the moment */
3696         return -1;
3697 }
3698
3699
3700 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3701                           const char *ifname, const u8 *addr)
3702 {
3703         nl80211_remove_iface(priv, if_nametoindex(ifname));
3704         return 0;
3705 }
3706
3707
3708 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3709                              const char *ifname, int vlan_id)
3710 {
3711         struct wpa_driver_nl80211_data *drv = priv;
3712         struct nl_msg *msg;
3713
3714         msg = nlmsg_alloc();
3715         if (!msg)
3716                 return -ENOMEM;
3717
3718         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3719                     0, NL80211_CMD_SET_STATION, 0);
3720
3721         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3722                     if_nametoindex(drv->ifname));
3723         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3724         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3725                     if_nametoindex(ifname));
3726
3727         return send_and_recv_msgs(drv, msg, NULL, NULL);
3728  nla_put_failure:
3729         return -ENOBUFS;
3730 }
3731
3732
3733 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3734 {
3735         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3736         struct sockaddr_ll lladdr;
3737         unsigned char buf[3000];
3738         int len;
3739         socklen_t fromlen = sizeof(lladdr);
3740
3741         len = recvfrom(sock, buf, sizeof(buf), 0,
3742                        (struct sockaddr *)&lladdr, &fromlen);
3743         if (len < 0) {
3744                 perror("recv");
3745                 return;
3746         }
3747
3748         if (have_ifidx(drv, lladdr.sll_ifindex)) {
3749                 struct hostapd_data *hapd;
3750                 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3751                 if (!hapd)
3752                         return;
3753                 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3754         }
3755 }
3756
3757
3758 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
3759                             int mode)
3760 {
3761         struct nl_msg *msg;
3762         int ret = -ENOBUFS;
3763
3764         msg = nlmsg_alloc();
3765         if (!msg)
3766                 return -ENOMEM;
3767
3768         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3769                     0, NL80211_CMD_SET_INTERFACE, 0);
3770         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3771                     if_nametoindex(ifname));
3772         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3773
3774         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3775         if (!ret)
3776                 return 0;
3777  nla_put_failure:
3778         wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
3779                    "mode.", ifname);
3780         return ret;
3781 }
3782
3783
3784 #ifdef CONFIG_IEEE80211N
3785 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
3786                               int freq, u8 *ie, size_t ie_len)
3787 {
3788         struct ieee802_11_elems elems;
3789         int ht, pri_chan = 0, sec_chan = 0;
3790         struct ieee80211_ht_operation *oper;
3791         struct hostapd_neighbor_bss *nnei;
3792
3793         ieee802_11_parse_elems(ie, ie_len, &elems, 0);
3794         ht = elems.ht_capabilities || elems.ht_operation;
3795         if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
3796                 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
3797                 pri_chan = oper->control_chan;
3798                 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
3799                         if (oper->ht_param &
3800                             HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
3801                                 sec_chan = pri_chan + 4;
3802                         else if (oper->ht_param &
3803                             HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
3804                                 sec_chan = pri_chan - 4;
3805                 }
3806         }
3807
3808         wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
3809                    " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
3810                    MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
3811
3812         nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
3813                           sizeof(struct hostapd_neighbor_bss));
3814         if (nnei == NULL)
3815                 return;
3816         drv->neighbors = nnei;
3817         nnei = &nnei[drv->num_neighbors];
3818         os_memcpy(nnei->bssid, bssid, ETH_ALEN);
3819         nnei->freq = freq;
3820         nnei->ht = !!ht;
3821         nnei->pri_chan = pri_chan;
3822         nnei->sec_chan = sec_chan;
3823         drv->num_neighbors++;
3824 }
3825
3826
3827 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
3828 {
3829         int divi = 1000000, i;
3830
3831         if (iwe->u.freq.e == 0) {
3832                 /*
3833                  * Some drivers do not report frequency, but a channel.
3834                  * Try to map this to frequency by assuming they are using
3835                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
3836                  * frequency if the driver sends both frequency and channel,
3837                  * since the driver may be sending an A-band channel that we
3838                  * don't handle here.
3839                  */
3840
3841                 if (*freq)
3842                         return 0;
3843
3844                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
3845                         *freq = 2407 + 5 * iwe->u.freq.m;
3846                         return 0;
3847                 } else if (iwe->u.freq.m == 14) {
3848                         *freq = 2484;
3849                         return 0;
3850                 }
3851         }
3852
3853         if (iwe->u.freq.e > 6) {
3854                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
3855                            "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
3856                 return -1;
3857         }
3858
3859         for (i = 0; i < iwe->u.freq.e; i++)
3860                 divi /= 10;
3861         *freq = iwe->u.freq.m / divi;
3862         return 0;
3863 }
3864
3865
3866 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
3867                            size_t len)
3868 {
3869         size_t ap_num = 0;
3870         int first;
3871         struct iw_event iwe_buf, *iwe = &iwe_buf;
3872         char *pos, *end, *custom;
3873         u8 bssid[ETH_ALEN];
3874         int freq = 0;
3875         u8 *ie = NULL;
3876         size_t ie_len = 0;
3877
3878         ap_num = 0;
3879         first = 1;
3880
3881         pos = (char *) res_buf;
3882         end = (char *) res_buf + len;
3883
3884         while (pos + IW_EV_LCP_LEN <= end) {
3885                 /* Event data may be unaligned, so make a local, aligned copy
3886                  * before processing. */
3887                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
3888                 if (iwe->len <= IW_EV_LCP_LEN)
3889                         break;
3890
3891                 custom = pos + IW_EV_POINT_LEN;
3892                 if (iwe->cmd == IWEVGENIE) {
3893                         /* WE-19 removed the pointer from struct iw_point */
3894                         char *dpos = (char *) &iwe_buf.u.data.length;
3895                         int dlen = dpos - (char *) &iwe_buf;
3896                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
3897                                   sizeof(struct iw_event) - dlen);
3898                 } else {
3899                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
3900                         custom += IW_EV_POINT_OFF;
3901                 }
3902
3903                 switch (iwe->cmd) {
3904                 case SIOCGIWAP:
3905                         if (!first)
3906                                 i802_add_neighbor(drv, bssid, freq, ie,
3907                                                   ie_len);
3908                         first = 0;
3909                         os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
3910                         freq = 0;
3911                         ie = NULL;
3912                         ie_len = 0;
3913                         break;
3914                 case SIOCGIWFREQ:
3915                         i802_get_scan_freq(iwe, &freq);
3916                         break;
3917                 case IWEVGENIE:
3918                         if (custom + iwe->u.data.length > end) {
3919                                 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
3920                                 return -1;
3921                         }
3922                         ie = (u8 *) custom;
3923                         ie_len = iwe->u.data.length;
3924                         break;
3925                 }
3926
3927                 pos += iwe->len;
3928         }
3929
3930         if (!first)
3931                 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
3932
3933         return 0;
3934 }
3935
3936
3937 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
3938 {
3939         struct iwreq iwr;
3940         u8 *res_buf;
3941         size_t res_buf_len;
3942         int res;
3943
3944         res_buf_len = IW_SCAN_MAX_DATA;
3945         for (;;) {
3946                 res_buf = os_malloc(res_buf_len);
3947                 if (res_buf == NULL)
3948                         return -1;
3949                 os_memset(&iwr, 0, sizeof(iwr));
3950                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3951                 iwr.u.data.pointer = res_buf;
3952                 iwr.u.data.length = res_buf_len;
3953
3954                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
3955                         break;
3956
3957                 if (errno == E2BIG && res_buf_len < 65535) {
3958                         os_free(res_buf);
3959                         res_buf = NULL;
3960                         res_buf_len *= 2;
3961                         if (res_buf_len > 65535)
3962                                 res_buf_len = 65535; /* 16-bit length field */
3963                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
3964                                    "trying larger buffer (%lu bytes)",
3965                                    (unsigned long) res_buf_len);
3966                 } else {
3967                         perror("ioctl[SIOCGIWSCAN]");
3968                         os_free(res_buf);
3969                         return -1;
3970                 }
3971         }
3972
3973         if (iwr.u.data.length > res_buf_len) {
3974                 os_free(res_buf);
3975                 return -1;
3976         }
3977
3978         res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
3979         os_free(res_buf);
3980
3981         return res;
3982 }
3983
3984
3985 static int i802_is_event_wireless_scan_complete(char *data, int len)
3986 {
3987         struct iw_event iwe_buf, *iwe = &iwe_buf;
3988         char *pos, *end;
3989
3990         pos = data;
3991         end = data + len;
3992
3993         while (pos + IW_EV_LCP_LEN <= end) {
3994                 /* Event data may be unaligned, so make a local, aligned copy
3995                  * before processing. */
3996                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
3997                 if (iwe->cmd == SIOCGIWSCAN)
3998                         return 1;
3999
4000                 pos += iwe->len;
4001         }
4002
4003         return 0;
4004 }
4005
4006
4007 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4008 {
4009         struct ifinfomsg *ifi;
4010         int attrlen, _nlmsg_len, rta_len;
4011         struct rtattr *attr;
4012
4013         if (len < (int) sizeof(*ifi))
4014                 return 0;
4015
4016         ifi = NLMSG_DATA(h);
4017
4018         if (ifindex != ifi->ifi_index)
4019                 return 0; /* event for foreign ifindex */
4020
4021         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4022
4023         attrlen = h->nlmsg_len - _nlmsg_len;
4024         if (attrlen < 0)
4025                 return 0;
4026
4027         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4028
4029         rta_len = RTA_ALIGN(sizeof(struct rtattr));
4030         while (RTA_OK(attr, attrlen)) {
4031                 if (attr->rta_type == IFLA_WIRELESS &&
4032                     i802_is_event_wireless_scan_complete(
4033                             ((char *) attr) + rta_len,
4034                             attr->rta_len - rta_len))
4035                         return 1;
4036                 attr = RTA_NEXT(attr, attrlen);
4037         }
4038
4039         return 0;
4040 }
4041
4042
4043 static int i802_is_scan_complete(int s, int ifindex)
4044 {
4045         char buf[1024];
4046         int left;
4047         struct nlmsghdr *h;
4048
4049         left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4050         if (left < 0) {
4051                 perror("recv(netlink)");
4052                 return 0;
4053         }
4054
4055         h = (struct nlmsghdr *) buf;
4056         while (left >= (int) sizeof(*h)) {
4057                 int len, plen;
4058
4059                 len = h->nlmsg_len;
4060                 plen = len - sizeof(*h);
4061                 if (len > left || plen < 0) {
4062                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4063                                    "len=%d left=%d plen=%d",
4064                                    len, left, plen);
4065                         break;
4066                 }
4067
4068                 switch (h->nlmsg_type) {
4069                 case RTM_NEWLINK:
4070                         if (i802_is_rtm_scan_complete(ifindex, h, plen))
4071                                 return 1;
4072                         break;
4073                 }
4074
4075                 len = NLMSG_ALIGN(len);
4076                 left -= len;
4077                 h = (struct nlmsghdr *) ((char *) h + len);
4078         }
4079
4080         return 0;
4081 }
4082
4083
4084 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4085 {
4086         struct iwreq iwr;
4087         int s, res, ifindex;
4088         struct sockaddr_nl local;
4089         time_t now, end;
4090         fd_set rfds;
4091         struct timeval tv;
4092
4093         wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4094                    "starting HT 20/40 MHz BSS");
4095
4096         /* Request a new scan */
4097         /* TODO: would be enough to scan the selected band */
4098         os_memset(&iwr, 0, sizeof(iwr));
4099         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4100         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4101                 perror("ioctl[SIOCSIWSCAN]");
4102                 return -1;
4103         }
4104
4105         ifindex = if_nametoindex(drv->ifname);
4106
4107         /* Wait for scan completion event or timeout */
4108         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4109         if (s < 0) {
4110                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4111                 return -1;
4112         }
4113
4114         os_memset(&local, 0, sizeof(local));
4115         local.nl_family = AF_NETLINK;
4116         local.nl_groups = RTMGRP_LINK;
4117         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
4118                 perror("bind(netlink)");
4119                 close(s);
4120                 return -1;
4121         }
4122
4123         time(&end);
4124         end += 30; /* Wait at most 30 seconds for scan results */
4125         for (;;) {
4126                 time(&now);
4127                 tv.tv_sec = end > now ? end - now : 0;
4128                 tv.tv_usec = 0;
4129                 FD_ZERO(&rfds);
4130                 FD_SET(s, &rfds);
4131                 res = select(s + 1, &rfds, NULL, NULL, &tv);
4132                 if (res < 0) {
4133                         perror("select");
4134                         /* Assume results are ready after 10 seconds wait */
4135                         os_sleep(10, 0);
4136                         break;
4137                 } else if (res) {
4138                         if (i802_is_scan_complete(s, ifindex)) {
4139                                 wpa_printf(MSG_DEBUG, "nl80211: Scan "
4140                                            "completed");
4141                                 break;
4142                         }
4143                 } else {
4144                         wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
4145                         /* Assume results are ready to be read now */
4146                         break;
4147                 }
4148         }
4149
4150         close(s);
4151
4152         return i802_get_ht_scan_res(drv);
4153 }
4154 #endif /* CONFIG_IEEE80211N */
4155
4156
4157 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
4158 {
4159         struct ifreq ifr;
4160
4161         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
4162         if (drv->ioctl_sock < 0) {
4163                 perror("socket[PF_INET,SOCK_DGRAM]");
4164                 return -1;
4165         }
4166
4167         /* start listening for EAPOL on the default AP interface */
4168         add_ifidx(drv, if_nametoindex(drv->ifname));
4169
4170         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4171                 return -1;
4172
4173         if (bssid) {
4174                 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
4175                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
4176                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
4177
4178                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
4179                         perror("ioctl(SIOCSIFHWADDR)");
4180                         return -1;
4181                 }
4182         }
4183
4184         if (wpa_driver_nl80211_init_nl(drv, drv->hapd))
4185                 return -1;
4186
4187 #ifdef CONFIG_IEEE80211N
4188         if (drv->ht_40mhz_scan) {
4189                 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
4190                     || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
4191                     i802_ht_scan(drv) ||
4192                     hostapd_set_iface_flags(drv, drv->ifname, 0)) {
4193                         wpa_printf(MSG_ERROR, "Failed to scan channels for "
4194                                    "HT 40 MHz operations");
4195                         return -1;
4196                 }
4197         }
4198 #endif /* CONFIG_IEEE80211N */
4199
4200         /* Initialise a monitor interface */
4201         if (nl80211_create_monitor_interface(drv))
4202                 return -1;
4203
4204         if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
4205                 goto fail1;
4206
4207         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4208                 goto fail1;
4209
4210         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4211         if (drv->eapol_sock < 0) {
4212                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4213                 goto fail1;
4214         }
4215
4216         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4217         {
4218                 printf("Could not register read socket for eapol\n");
4219                 return -1;
4220         }
4221
4222         memset(&ifr, 0, sizeof(ifr));
4223         os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
4224         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
4225                 perror("ioctl(SIOCGIFHWADDR)");
4226                 goto fail1;
4227         }
4228
4229         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
4230                 printf("Invalid HW-addr family 0x%04x\n",
4231                        ifr.ifr_hwaddr.sa_family);
4232                 goto fail1;
4233         }
4234         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
4235
4236         return 0;
4237
4238 fail1:
4239         nl80211_remove_iface(drv, drv->monitor_ifidx);
4240         return -1;
4241 }
4242
4243
4244 static int i802_get_inact_sec(void *priv, const u8 *addr)
4245 {
4246         struct hostap_sta_driver_data data;
4247         int ret;
4248
4249         data.inactive_msec = (unsigned long) -1;
4250         ret = i802_read_sta_data(priv, &data, addr);
4251         if (ret || data.inactive_msec == (unsigned long) -1)
4252                 return -1;
4253         return data.inactive_msec / 1000;
4254 }
4255
4256
4257 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4258 {
4259 #if 0
4260         /* TODO */
4261 #endif
4262         return 0;
4263 }
4264
4265
4266 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
4267 {
4268         struct wpa_driver_nl80211_data *drv = priv;
4269         struct ieee80211_mgmt mgmt;
4270
4271         memset(&mgmt, 0, sizeof(mgmt));
4272         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4273                                           WLAN_FC_STYPE_DEAUTH);
4274         memcpy(mgmt.da, addr, ETH_ALEN);
4275         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4276         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4277         mgmt.u.deauth.reason_code = host_to_le16(reason);
4278         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4279                                             IEEE80211_HDRLEN +
4280                                             sizeof(mgmt.u.deauth));
4281 }
4282
4283
4284 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
4285 {
4286         struct wpa_driver_nl80211_data *drv = priv;
4287         struct ieee80211_mgmt mgmt;
4288
4289         memset(&mgmt, 0, sizeof(mgmt));
4290         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4291                                           WLAN_FC_STYPE_DISASSOC);
4292         memcpy(mgmt.da, addr, ETH_ALEN);
4293         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4294         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4295         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4296         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4297                                             IEEE80211_HDRLEN +
4298                                             sizeof(mgmt.u.disassoc));
4299 }
4300
4301
4302 static const struct hostapd_neighbor_bss *
4303 i802_get_neighbor_bss(void *priv, size_t *num)
4304 {
4305         struct wpa_driver_nl80211_data *drv = priv;
4306         *num = drv->num_neighbors;
4307         return drv->neighbors;
4308 }
4309
4310
4311 static void *i802_init(struct hostapd_data *hapd,
4312                        struct wpa_init_params *params)
4313 {
4314         struct wpa_driver_nl80211_data *drv;
4315         size_t i;
4316
4317         drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
4318         if (drv == NULL) {
4319                 printf("Could not allocate memory for i802 driver data\n");
4320                 return NULL;
4321         }
4322
4323         drv->hapd = hapd;
4324         memcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
4325         drv->ifindex = if_nametoindex(drv->ifname);
4326         drv->bss.ifindex = drv->ifindex;
4327
4328         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4329         drv->if_indices = drv->default_if_indices;
4330         for (i = 0; i < params->num_bridge; i++) {
4331                 if (params->bridge[i])
4332                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4333         }
4334         drv->ht_40mhz_scan = params->ht_40mhz_scan;
4335
4336         if (i802_init_sockets(drv, params->bssid))
4337                 goto failed;
4338
4339         return drv;
4340
4341 failed:
4342         free(drv);
4343         return NULL;
4344 }
4345
4346
4347 static void i802_deinit(void *priv)
4348 {
4349         struct wpa_driver_nl80211_data *drv = priv;
4350         struct i802_bss *bss, *prev;
4351
4352         if (drv->last_freq_ht) {
4353                 /* Clear HT flags from the driver */
4354                 struct hostapd_freq_params freq;
4355                 os_memset(&freq, 0, sizeof(freq));
4356                 freq.freq = drv->last_freq;
4357                 i802_set_freq(priv, &freq);
4358         }
4359
4360         i802_del_beacon(drv);
4361
4362         /* remove monitor interface */
4363         nl80211_remove_iface(drv, drv->monitor_ifidx);
4364
4365         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
4366
4367         if (drv->monitor_sock >= 0) {
4368                 eloop_unregister_read_sock(drv->monitor_sock);
4369                 close(drv->monitor_sock);
4370         }
4371         if (drv->ioctl_sock >= 0)
4372                 close(drv->ioctl_sock);
4373         if (drv->eapol_sock >= 0) {
4374                 eloop_unregister_read_sock(drv->eapol_sock);
4375                 close(drv->eapol_sock);
4376         }
4377
4378         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
4379         genl_family_put(drv->nl80211);
4380         nl_cache_free(drv->nl_cache);
4381         nl_handle_destroy(drv->nl_handle);
4382         nl_cb_put(drv->nl_cb);
4383
4384         if (drv->if_indices != drv->default_if_indices)
4385                 free(drv->if_indices);
4386
4387         os_free(drv->neighbors);
4388
4389         bss = drv->bss.next;
4390         while (bss) {
4391                 prev = bss;
4392                 bss = bss->next;
4393                 os_free(bss);
4394         }
4395
4396         free(drv);
4397 }
4398
4399 #endif /* HOSTAPD */
4400
4401
4402 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4403         .name = "nl80211",
4404         .desc = "Linux nl80211/cfg80211",
4405         .get_bssid = wpa_driver_nl80211_get_bssid,
4406         .get_ssid = wpa_driver_nl80211_get_ssid,
4407         .set_key = wpa_driver_nl80211_set_key,
4408         .scan2 = wpa_driver_nl80211_scan,
4409         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4410         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4411         .disassociate = wpa_driver_nl80211_disassociate,
4412         .authenticate = wpa_driver_nl80211_authenticate,
4413         .associate = wpa_driver_nl80211_associate,
4414         .init = wpa_driver_nl80211_init,
4415         .deinit = wpa_driver_nl80211_deinit,
4416         .get_capa = wpa_driver_nl80211_get_capa,
4417         .set_operstate = wpa_driver_nl80211_set_operstate,
4418         .set_country = wpa_driver_nl80211_set_country,
4419 #ifdef CONFIG_AP
4420         .set_beacon = wpa_driver_nl80211_set_beacon,
4421 #endif /* CONFIG_AP */
4422 #if defined(CONFIG_AP) || defined(HOSTAPD)
4423         .send_mlme = wpa_driver_nl80211_send_mlme,
4424         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4425         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4426 #endif /* CONFIG_AP || HOSTAPD */
4427 #ifdef HOSTAPD
4428         .hapd_init = i802_init,
4429         .hapd_deinit = i802_deinit,
4430         .hapd_set_key = i802_set_key,
4431         .get_seqnum = i802_get_seqnum,
4432         .flush = i802_flush,
4433         .read_sta_data = i802_read_sta_data,
4434         .hapd_send_eapol = i802_send_eapol,
4435         .sta_set_flags = i802_sta_set_flags,
4436         .sta_deauth = i802_sta_deauth,
4437         .sta_disassoc = i802_sta_disassoc,
4438         .sta_remove = i802_sta_remove,
4439         .sta_add = i802_sta_add,
4440         .get_inact_sec = i802_get_inact_sec,
4441         .sta_clear_stats = i802_sta_clear_stats,
4442         .set_freq = i802_set_freq,
4443         .set_rts = i802_set_rts,
4444         .set_frag = i802_set_frag,
4445         .set_retry = i802_set_retry,
4446         .set_rate_sets = i802_set_rate_sets,
4447         .hapd_set_beacon = i802_set_beacon,
4448         .set_cts_protect = i802_set_cts_protect,
4449         .set_preamble = i802_set_preamble,
4450         .set_short_slot_time = i802_set_short_slot_time,
4451         .set_tx_queue_params = i802_set_tx_queue_params,
4452         .bss_add = i802_bss_add,
4453         .bss_remove = i802_bss_remove,
4454         .if_add = i802_if_add,
4455         .if_update = i802_if_update,
4456         .if_remove = i802_if_remove,
4457         .set_sta_vlan = i802_set_sta_vlan,
4458         .get_neighbor_bss = i802_get_neighbor_bss,
4459 #endif /* HOSTAPD */
4460 };