vcs.maemo.org Git - wpasupplicant/blob - 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 #ifdef CONFIG_AP
 115         int beacon_int;
 116         unsigned int beacon_set:1;
 117         int monitor_sock;
 118         int monitor_ifidx;
 119 #endif /* CONFIG_AP */
 120
 121 #ifdef HOSTAPD
 122         struct hostapd_data *hapd;
 123
 124         int eapol_sock; /* socket for EAPOL frames */
 125         int monitor_sock; /* socket for monitor */
 126         int monitor_ifidx;
 127
 128         int default_if_indices[16];
 129         int *if_indices;
 130         int num_if_indices;
 131
 132         int beacon_int;
 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 handle_frame(struct wpa_driver_nl80211_data *drv,
 158                          u8 *buf, size_t len,
 159                          struct hostapd_frame_info *hfi,
 160                          enum ieee80211_msg_type msg_type);
 161 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 162 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 163 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 164                                  int ifindex);
 165 #endif /* HOSTAPD */
 166
 167
 168 /* nl80211 code */
 169 static int ack_handler(struct nl_msg *msg, void *arg)
 170 {
 171         int *err = arg;
 172         *err = 0;
 173         return NL_STOP;
 174 }
 175
 176 static int finish_handler(struct nl_msg *msg, void *arg)
 177 {
 178         int *ret = arg;
 179         *ret = 0;
 180         return NL_SKIP;
 181 }
 182
 183 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 184                          void *arg)
 185 {
 186         int *ret = arg;
 187         *ret = err->error;
 188         return NL_SKIP;
 189 }
 190
 191
 192 static int no_seq_check(struct nl_msg *msg, void *arg)
 193 {
 194         return NL_OK;
 195 }
 196
 197
 198 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 199                               struct nl_msg *msg,
 200                               int (*valid_handler)(struct nl_msg *, void *),
 201                               void *valid_data)
 202 {
 203         struct nl_cb *cb;
 204         int err = -ENOMEM;
 205
 206         cb = nl_cb_clone(drv->nl_cb);
 207         if (!cb)
 208                 goto out;
 209
 210         err = nl_send_auto_complete(drv->nl_handle, msg);
 211         if (err < 0)
 212                 goto out;
 213
 214         err = 1;
 215
 216         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 217         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 218         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 219
 220         if (valid_handler)
 221                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 222                           valid_handler, valid_data);
 223
 224         while (err > 0)
 225                 nl_recvmsgs(drv->nl_handle, cb);
 226  out:
 227         nl_cb_put(cb);
 228         nlmsg_free(msg);
 229         return err;
 230 }
 231
 232
 233 struct family_data {
 234         const char *group;
 235         int id;
 236 };
 237
 238
 239 static int family_handler(struct nl_msg *msg, void *arg)
 240 {
 241         struct family_data *res = arg;
 242         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 243         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 244         struct nlattr *mcgrp;
 245         int i;
 246
 247         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 248                   genlmsg_attrlen(gnlh, 0), NULL);
 249         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 250                 return NL_SKIP;
 251
 252         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 253                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 254                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 255                           nla_len(mcgrp), NULL);
 256                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 257                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 258                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 259                                res->group,
 260                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 261                         continue;
 262                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 263                 break;
 264         };
 265
 266         return NL_SKIP;
 267 }
 268
 269
 270 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 271                                const char *family, const char *group)
 272 {
 273         struct nl_msg *msg;
 274         int ret = -1;
 275         struct family_data res = { group, -ENOENT };
 276
 277         msg = nlmsg_alloc();
 278         if (!msg)
 279                 return -ENOMEM;
 280         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 281                     0, 0, CTRL_CMD_GETFAMILY, 0);
 282         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 283
 284         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 285         msg = NULL;
 286         if (ret == 0)
 287                 ret = res.id;
 288
 289 nla_put_failure:
 290         nlmsg_free(msg);
 291         return ret;
 292 }
 293
 294
 295 static int wpa_driver_nl80211_send_oper_ifla(
 296         struct wpa_driver_nl80211_data *drv,
 297         int linkmode, int operstate)
 298 {
 299         struct {
 300                 struct nlmsghdr hdr;
 301                 struct ifinfomsg ifinfo;
 302                 char opts[16];
 303         } req;
 304         struct rtattr *rta;
 305         static int nl_seq;
 306         ssize_t ret;
 307
 308         os_memset(&req, 0, sizeof(req));
 309
 310         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 311         req.hdr.nlmsg_type = RTM_SETLINK;
 312         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 313         req.hdr.nlmsg_seq = ++nl_seq;
 314         req.hdr.nlmsg_pid = 0;
 315
 316         req.ifinfo.ifi_family = AF_UNSPEC;
 317         req.ifinfo.ifi_type = 0;
 318         req.ifinfo.ifi_index = drv->ifindex;
 319         req.ifinfo.ifi_flags = 0;
 320         req.ifinfo.ifi_change = 0;
 321
 322         if (linkmode != -1) {
 323                 rta = (struct rtattr *)
 324                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 325                 rta->rta_type = IFLA_LINKMODE;
 326                 rta->rta_len = RTA_LENGTH(sizeof(char));
 327                 *((char *) RTA_DATA(rta)) = linkmode;
 328                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 329                         RTA_LENGTH(sizeof(char));
 330         }
 331         if (operstate != -1) {
 332                 rta = (struct rtattr *)
 333                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 334                 rta->rta_type = IFLA_OPERSTATE;
 335                 rta->rta_len = RTA_LENGTH(sizeof(char));
 336                 *((char *) RTA_DATA(rta)) = operstate;
 337                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 338                         RTA_LENGTH(sizeof(char));
 339         }
 340
 341         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 342                    linkmode, operstate);
 343
 344         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 345         if (ret < 0) {
 346                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 347                            "%s (assume operstate is not supported)",
 348                            strerror(errno));
 349         }
 350
 351         return ret < 0 ? -1 : 0;
 352 }
 353
 354
 355 static int wpa_driver_nl80211_set_auth_param(
 356         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 357 {
 358         struct iwreq iwr;
 359         int ret = 0;
 360
 361         os_memset(&iwr, 0, sizeof(iwr));
 362         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 363         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 364         iwr.u.param.value = value;
 365
 366         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 367                 if (errno != EOPNOTSUPP) {
 368                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 369                                    "value 0x%x) failed: %s)",
 370                                    idx, value, strerror(errno));
 371                 }
 372                 ret = errno == EOPNOTSUPP ? -2 : -1;
 373         }
 374
 375         return ret;
 376 }
 377
 378
 379 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 380 {
 381         struct wpa_driver_nl80211_data *drv = priv;
 382         if (!drv->associated)
 383                 return -1;
 384         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 385         return 0;
 386 }
 387
 388
 389 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 390 {
 391         struct wpa_driver_nl80211_data *drv = priv;
 392         if (!drv->associated)
 393                 return -1;
 394         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 395         return drv->ssid_len;
 396 }
 397
 398
 399 #ifndef HOSTAPD
 400 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 401                                           void *ctx, char *buf, size_t len,
 402                                           int del)
 403 {
 404         union wpa_event_data event;
 405
 406         os_memset(&event, 0, sizeof(event));
 407         if (len > sizeof(event.interface_status.ifname))
 408                 len = sizeof(event.interface_status.ifname) - 1;
 409         os_memcpy(event.interface_status.ifname, buf, len);
 410         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 411                 EVENT_INTERFACE_ADDED;
 412
 413         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 414                    del ? "DEL" : "NEW",
 415                    event.interface_status.ifname,
 416                    del ? "removed" : "added");
 417
 418         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 419                 if (del)
 420                         drv->if_removed = 1;
 421                 else
 422                         drv->if_removed = 0;
 423         }
 424
 425         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 426 }
 427
 428
 429 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 430                                          struct nlmsghdr *h)
 431 {
 432         struct ifinfomsg *ifi;
 433         int attrlen, _nlmsg_len, rta_len;
 434         struct rtattr *attr;
 435
 436         ifi = NLMSG_DATA(h);
 437
 438         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 439
 440         attrlen = h->nlmsg_len - _nlmsg_len;
 441         if (attrlen < 0)
 442                 return 0;
 443
 444         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 445
 446         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 447         while (RTA_OK(attr, attrlen)) {
 448                 if (attr->rta_type == IFLA_IFNAME) {
 449                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 450                             == 0)
 451                                 return 1;
 452                         else
 453                                 break;
 454                 }
 455                 attr = RTA_NEXT(attr, attrlen);
 456         }
 457
 458         return 0;
 459 }
 460
 461
 462 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 463                                           int ifindex, struct nlmsghdr *h)
 464 {
 465         if (drv->ifindex == ifindex)
 466                 return 1;
 467
 468         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 469                 drv->ifindex = if_nametoindex(drv->ifname);
 470                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 471                            "interface");
 472                 wpa_driver_nl80211_finish_drv_init(drv);
 473                 return 1;
 474         }
 475
 476         return 0;
 477 }
 478
 479
 480 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 481                                               void *ctx, struct nlmsghdr *h,
 482                                               size_t len)
 483 {
 484         struct ifinfomsg *ifi;
 485         int attrlen, _nlmsg_len, rta_len;
 486         struct rtattr * attr;
 487
 488         if (len < sizeof(*ifi))
 489                 return;
 490
 491         ifi = NLMSG_DATA(h);
 492
 493         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 494                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 495                            ifi->ifi_index);
 496                 return;
 497         }
 498
 499         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 500                    "(%s%s%s%s)",
 501                    drv->operstate, ifi->ifi_flags,
 502                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 503                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 504                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 505                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 506         /*
 507          * Some drivers send the association event before the operup event--in
 508          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 509          * fails. This will hit us when wpa_supplicant does not need to do
 510          * IEEE 802.1X authentication
 511          */
 512         if (drv->operstate == 1 &&
 513             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 514             !(ifi->ifi_flags & IFF_RUNNING))
 515                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 516
 517         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 518
 519         attrlen = h->nlmsg_len - _nlmsg_len;
 520         if (attrlen < 0)
 521                 return;
 522
 523         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 524
 525         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 526         while (RTA_OK(attr, attrlen)) {
 527                 if (attr->rta_type == IFLA_IFNAME) {
 528                         wpa_driver_nl80211_event_link(
 529                                 drv, ctx,
 530                                 ((char *) attr) + rta_len,
 531                                 attr->rta_len - rta_len, 0);
 532                 }
 533                 attr = RTA_NEXT(attr, attrlen);
 534         }
 535 }
 536
 537
 538 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 539                                               void *ctx, struct nlmsghdr *h,
 540                                               size_t len)
 541 {
 542         struct ifinfomsg *ifi;
 543         int attrlen, _nlmsg_len, rta_len;
 544         struct rtattr * attr;
 545
 546         if (len < sizeof(*ifi))
 547                 return;
 548
 549         ifi = NLMSG_DATA(h);
 550
 551         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 552
 553         attrlen = h->nlmsg_len - _nlmsg_len;
 554         if (attrlen < 0)
 555                 return;
 556
 557         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 558
 559         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 560         while (RTA_OK(attr, attrlen)) {
 561                 if (attr->rta_type == IFLA_IFNAME) {
 562                         wpa_driver_nl80211_event_link(
 563                                 drv, ctx,
 564                                 ((char *) attr) + rta_len,
 565                                 attr->rta_len - rta_len, 1);
 566                 }
 567                 attr = RTA_NEXT(attr, attrlen);
 568         }
 569 }
 570
 571
 572 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 573                                                   void *sock_ctx)
 574 {
 575         char buf[8192];
 576         int left;
 577         struct sockaddr_nl from;
 578         socklen_t fromlen;
 579         struct nlmsghdr *h;
 580         int max_events = 10;
 581
 582 try_again:
 583         fromlen = sizeof(from);
 584         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 585                         (struct sockaddr *) &from, &fromlen);
 586         if (left < 0) {
 587                 if (errno != EINTR && errno != EAGAIN)
 588                         perror("recvfrom(netlink)");
 589                 return;
 590         }
 591
 592         h = (struct nlmsghdr *) buf;
 593         while (left >= (int) sizeof(*h)) {
 594                 int len, plen;
 595
 596                 len = h->nlmsg_len;
 597                 plen = len - sizeof(*h);
 598                 if (len > left || plen < 0) {
 599                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 600                                    "len=%d left=%d plen=%d",
 601                                    len, left, plen);
 602                         break;
 603                 }
 604
 605                 switch (h->nlmsg_type) {
 606                 case RTM_NEWLINK:
 607                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 608                                                           h, plen);
 609                         break;
 610                 case RTM_DELLINK:
 611                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 612                                                           h, plen);
 613                         break;
 614                 }
 615
 616                 len = NLMSG_ALIGN(len);
 617                 left -= len;
 618                 h = (struct nlmsghdr *) ((char *) h + len);
 619         }
 620
 621         if (left > 0) {
 622                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 623                            "message", left);
 624         }
 625
 626         if (--max_events > 0) {
 627                 /*
 628                  * Try to receive all events in one eloop call in order to
 629                  * limit race condition on cases where AssocInfo event, Assoc
 630                  * event, and EAPOL frames are received more or less at the
 631                  * same time. We want to process the event messages first
 632                  * before starting EAPOL processing.
 633                  */
 634                 goto try_again;
 635         }
 636 }
 637
 638
 639 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 640                             const u8 *frame, size_t len)
 641 {
 642         const struct ieee80211_mgmt *mgmt;
 643         union wpa_event_data event;
 644
 645         mgmt = (const struct ieee80211_mgmt *) frame;
 646         if (len < 24 + sizeof(mgmt->u.auth)) {
 647                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 648                            "frame");
 649                 return;
 650         }
 651
 652         os_memset(&event, 0, sizeof(event));
 653         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 654         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 655         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 656         if (len > 24 + sizeof(mgmt->u.auth)) {
 657                 event.auth.ies = mgmt->u.auth.variable;
 658                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 659         }
 660
 661         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 662 }
 663
 664
 665 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 666                             const u8 *frame, size_t len)
 667 {
 668         const struct ieee80211_mgmt *mgmt;
 669         union wpa_event_data event;
 670         u16 status;
 671
 672         mgmt = (const struct ieee80211_mgmt *) frame;
 673         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 674                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 675                            "frame");
 676                 return;
 677         }
 678
 679         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 680         if (status != WLAN_STATUS_SUCCESS) {
 681                 os_memset(&event, 0, sizeof(event));
 682                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 683                         event.assoc_reject.resp_ies =
 684                                 (u8 *) mgmt->u.assoc_resp.variable;
 685                         event.assoc_reject.resp_ies_len =
 686                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 687                 }
 688                 event.assoc_reject.status_code = status;
 689
 690                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 691                 return;
 692         }
 693
 694         drv->associated = 1;
 695         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 696
 697         os_memset(&event, 0, sizeof(event));
 698         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 699                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 700                 event.assoc_info.resp_ies_len =
 701                         len - 24 - sizeof(mgmt->u.assoc_resp);
 702         }
 703
 704         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 705 }
 706
 707
 708 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 709                        enum nl80211_commands cmd, struct nlattr *frame)
 710 {
 711         if (frame == NULL) {
 712                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 713                            "data", cmd);
 714                 return;
 715         }
 716
 717         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 718         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 719                     nla_data(frame), nla_len(frame));
 720
 721         switch (cmd) {
 722         case NL80211_CMD_AUTHENTICATE:
 723                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 724                 break;
 725         case NL80211_CMD_ASSOCIATE:
 726                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 727                 break;
 728         case NL80211_CMD_DEAUTHENTICATE:
 729                 drv->associated = 0;
 730                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 731                 break;
 732         case NL80211_CMD_DISASSOCIATE:
 733                 drv->associated = 0;
 734                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 735                 break;
 736         default:
 737                 break;
 738         }
 739 }
 740
 741 #endif /* HOSTAPD */
 742
 743
 744 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 745                                            struct nlattr *tb[])
 746 {
 747 #ifdef HOSTAPD
 748         if (tb[NL80211_ATTR_MAC])
 749                 hostapd_michael_mic_failure(drv->hapd,
 750                                             nla_data(tb[NL80211_ATTR_MAC]));
 751 #else /* HOSTAPD */
 752         union wpa_event_data data;
 753
 754         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 755         os_memset(&data, 0, sizeof(data));
 756         if (tb[NL80211_ATTR_MAC]) {
 757                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 758                             nla_data(tb[NL80211_ATTR_MAC]),
 759                             nla_len(tb[NL80211_ATTR_MAC]));
 760         }
 761         if (tb[NL80211_ATTR_KEY_SEQ]) {
 762                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 763                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 764                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 765         }
 766         if (tb[NL80211_ATTR_KEY_TYPE]) {
 767                 enum nl80211_key_type key_type =
 768                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 769                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 770                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 771                         data.michael_mic_failure.unicast = 1;
 772         } else
 773                 data.michael_mic_failure.unicast = 1;
 774
 775         if (tb[NL80211_ATTR_KEY_IDX]) {
 776                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 777                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 778         }
 779
 780         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 781 #endif /* HOSTAPD */
 782 }
 783
 784
 785 static int process_event(struct nl_msg *msg, void *arg)
 786 {
 787         struct wpa_driver_nl80211_data *drv = arg;
 788         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 789         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 790
 791         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 792                   genlmsg_attrlen(gnlh, 0), NULL);
 793
 794         if (tb[NL80211_ATTR_IFINDEX]) {
 795                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 796                 if (ifindex != drv->ifindex) {
 797                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 798                                    " for foreign interface (ifindex %d)",
 799                                    gnlh->cmd, ifindex);
 800                         return NL_SKIP;
 801                 }
 802         }
 803
 804         switch (gnlh->cmd) {
 805 #ifndef HOSTAPD
 806         case NL80211_CMD_NEW_SCAN_RESULTS:
 807                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 808                 drv->scan_complete_events = 1;
 809                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 810                                      drv->ctx);
 811                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 812                 break;
 813         case NL80211_CMD_SCAN_ABORTED:
 814                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 815                 /*
 816                  * Need to indicate that scan results are available in order
 817                  * not to make wpa_supplicant stop its scanning.
 818                  */
 819                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 820                                      drv->ctx);
 821                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 822                 break;
 823         case NL80211_CMD_AUTHENTICATE:
 824         case NL80211_CMD_ASSOCIATE:
 825         case NL80211_CMD_DEAUTHENTICATE:
 826         case NL80211_CMD_DISASSOCIATE:
 827                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
 828                 break;
 829 #endif /* HOSTAPD */
 830         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 831                 mlme_event_michael_mic_failure(drv, tb);
 832                 break;
 833         default:
 834                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 835                            "(cmd=%d)", gnlh->cmd);
 836                 break;
 837         }
 838
 839         return NL_SKIP;
 840 }
 841
 842
 843 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 844                                              void *sock_ctx)
 845 {
 846         struct nl_cb *cb;
 847         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 848
 849         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 850
 851         cb = nl_cb_clone(drv->nl_cb);
 852         if (!cb)
 853                 return;
 854         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 855         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 856         nl_recvmsgs(drv->nl_handle, cb);
 857         nl_cb_put(cb);
 858 }
 859
 860
 861 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 862                                    const char *ifname, int dev_up)
 863 {
 864         struct ifreq ifr;
 865
 866         if (drv->ioctl_sock < 0)
 867                 return -1;
 868
 869         os_memset(&ifr, 0, sizeof(ifr));
 870         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 871
 872         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 873                 perror("ioctl[SIOCGIFFLAGS]");
 874                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 875                            ifname);
 876                 return -1;
 877         }
 878
 879         if (dev_up) {
 880                 if (ifr.ifr_flags & IFF_UP)
 881                         return 0;
 882                 ifr.ifr_flags |= IFF_UP;
 883         } else {
 884                 if (!(ifr.ifr_flags & IFF_UP))
 885                         return 0;
 886                 ifr.ifr_flags &= ~IFF_UP;
 887         }
 888
 889         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 890                 perror("ioctl[SIOCSIFFLAGS]");
 891                 return -1;
 892         }
 893
 894         return 0;
 895 }
 896
 897
 898 /**
 899  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 900  * @priv: driver_nl80211 private data
 901  * @alpha2_arg: country to which to switch to
 902  * Returns: 0 on success, -1 on failure
 903  *
 904  * This asks nl80211 to set the regulatory domain for given
 905  * country ISO / IEC alpha2.
 906  */
 907 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 908 {
 909         struct wpa_driver_nl80211_data *drv = priv;
 910         char alpha2[3];
 911         struct nl_msg *msg;
 912
 913         msg = nlmsg_alloc();
 914         if (!msg)
 915                 return -ENOMEM;
 916
 917         alpha2[0] = alpha2_arg[0];
 918         alpha2[1] = alpha2_arg[1];
 919         alpha2[2] = '\0';
 920
 921         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 922                     0, NL80211_CMD_REQ_SET_REG, 0);
 923
 924         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 925         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 926                 return -EINVAL;
 927         return 0;
 928 nla_put_failure:
 929         return -EINVAL;
 930 }
 931
 932
 933 struct wiphy_info_data {
 934         int max_scan_ssids;
 935         int ap_supported;
 936 };
 937
 938
 939 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 940 {
 941         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 942         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 943         struct wiphy_info_data *info = arg;
 944
 945         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 946                   genlmsg_attrlen(gnlh, 0), NULL);
 947
 948         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 949                 info->max_scan_ssids =
 950                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 951
 952         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 953                 struct nlattr *nl_mode;
 954                 int i;
 955                 nla_for_each_nested(nl_mode,
 956                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 957                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 958                                 info->ap_supported = 1;
 959                                 break;
 960                         }
 961                 }
 962         }
 963
 964         return NL_SKIP;
 965 }
 966
 967
 968 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 969                                        struct wiphy_info_data *info)
 970 {
 971         struct nl_msg *msg;
 972
 973         os_memset(info, 0, sizeof(*info));
 974         msg = nlmsg_alloc();
 975         if (!msg)
 976                 return -1;
 977
 978         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 979                     0, NL80211_CMD_GET_WIPHY, 0);
 980
 981         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 982
 983         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
 984                 return 0;
 985         msg = NULL;
 986 nla_put_failure:
 987         nlmsg_free(msg);
 988         return -1;
 989 }
 990
 991
 992 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
 993 {
 994         struct wiphy_info_data info;
 995         if (wpa_driver_nl80211_get_info(drv, &info))
 996                 return;
 997         drv->has_capability = 1;
 998         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
 999         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1000                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1001                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1002                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1003         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1004                 WPA_DRIVER_CAPA_ENC_WEP104 |
1005                 WPA_DRIVER_CAPA_ENC_TKIP |
1006                 WPA_DRIVER_CAPA_ENC_CCMP;
1007
1008         drv->capa.max_scan_ssids = info.max_scan_ssids;
1009         if (info.ap_supported)
1010                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1011 }
1012
1013
1014 /**
1015  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1016  * @ctx: context to be used when calling wpa_supplicant functions,
1017  * e.g., wpa_supplicant_event()
1018  * @ifname: interface name, e.g., wlan0
1019  * Returns: Pointer to private data, %NULL on failure
1020  */
1021 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1022 {
1023         int s, ret;
1024         struct sockaddr_nl local;
1025         struct wpa_driver_nl80211_data *drv;
1026
1027         drv = os_zalloc(sizeof(*drv));
1028         if (drv == NULL)
1029                 return NULL;
1030         drv->ctx = ctx;
1031         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1032 #ifdef CONFIG_AP
1033         drv->monitor_ifidx = -1;
1034         drv->monitor_sock = -1;
1035 #endif /* CONFIG_AP */
1036
1037         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1038         if (drv->nl_cb == NULL) {
1039                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1040                            "callbacks");
1041                 goto err1;
1042         }
1043
1044         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1045         if (drv->nl_handle == NULL) {
1046                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1047                            "callbacks");
1048                 goto err2;
1049         }
1050
1051         if (genl_connect(drv->nl_handle)) {
1052                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1053                            "netlink");
1054                 goto err3;
1055         }
1056
1057         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1058         if (drv->nl_cache == NULL) {
1059                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1060                            "netlink cache");
1061                 goto err3;
1062         }
1063
1064         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1065         if (drv->nl80211 == NULL) {
1066                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1067                            "found");
1068                 goto err4;
1069         }
1070
1071         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1072         if (ret >= 0)
1073                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1074         if (ret < 0) {
1075                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1076                            "membership for scan events: %d (%s)",
1077                            ret, strerror(-ret));
1078                 goto err4;
1079         }
1080
1081         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1082         if (ret >= 0)
1083                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1084         if (ret < 0) {
1085                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1086                            "membership for mlme events: %d (%s)",
1087                            ret, strerror(-ret));
1088                 goto err4;
1089         }
1090         drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1091
1092         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1093                                  wpa_driver_nl80211_event_receive, drv, ctx);
1094
1095         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1096         if (drv->ioctl_sock < 0) {
1097                 perror("socket(PF_INET,SOCK_DGRAM)");
1098                 goto err5;
1099         }
1100
1101         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1102         if (s < 0) {
1103                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1104                 goto err6;
1105         }
1106
1107         os_memset(&local, 0, sizeof(local));
1108         local.nl_family = AF_NETLINK;
1109         local.nl_groups = RTMGRP_LINK;
1110         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1111                 perror("bind(netlink)");
1112                 close(s);
1113                 goto err6;
1114         }
1115
1116 #ifndef HOSTAPD
1117         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1118                                  ctx);
1119 #endif /* HOSTAPD */
1120         drv->link_event_sock = s;
1121
1122         if (wpa_driver_nl80211_finish_drv_init(drv))
1123                 goto err7;
1124
1125         return drv;
1126
1127 err7:
1128         eloop_unregister_read_sock(drv->link_event_sock);
1129         close(drv->link_event_sock);
1130 err6:
1131         close(drv->ioctl_sock);
1132 err5:
1133         genl_family_put(drv->nl80211);
1134 err4:
1135         nl_cache_free(drv->nl_cache);
1136 err3:
1137         nl_handle_destroy(drv->nl_handle);
1138 err2:
1139         nl_cb_put(drv->nl_cb);
1140 err1:
1141         os_free(drv);
1142         return NULL;
1143 }
1144
1145
1146 static int
1147 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1148 {
1149         drv->ifindex = if_nametoindex(drv->ifname);
1150
1151         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1152                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1153                            "use managed mode");
1154         }
1155
1156         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1157                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1158                            "UP", drv->ifname);
1159                 return -1;
1160         }
1161
1162         wpa_driver_nl80211_capa(drv);
1163
1164         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1165
1166         return 0;
1167 }
1168
1169
1170 /**
1171  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1172  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1173  *
1174  * Shut down driver interface and processing of driver events. Free
1175  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1176  */
1177 static void wpa_driver_nl80211_deinit(void *priv)
1178 {
1179         struct wpa_driver_nl80211_data *drv = priv;
1180
1181 #ifdef CONFIG_AP
1182         if (drv->monitor_ifidx >= 0)
1183                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1184         if (drv->monitor_sock >= 0) {
1185                 eloop_unregister_read_sock(drv->monitor_sock);
1186                 close(drv->monitor_sock);
1187         }
1188 #endif /* CONFIG_AP */
1189
1190         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1191
1192         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1193
1194         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1195
1196         eloop_unregister_read_sock(drv->link_event_sock);
1197
1198         hostapd_set_iface_flags(drv, drv->ifname, 0);
1199         wpa_driver_nl80211_set_mode(drv, 0);
1200
1201         close(drv->link_event_sock);
1202         close(drv->ioctl_sock);
1203
1204         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1205         genl_family_put(drv->nl80211);
1206         nl_cache_free(drv->nl_cache);
1207         nl_handle_destroy(drv->nl_handle);
1208         nl_cb_put(drv->nl_cb);
1209
1210         os_free(drv);
1211 }
1212
1213
1214 /**
1215  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1216  * @eloop_ctx: Unused
1217  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1218  *
1219  * This function can be used as registered timeout when starting a scan to
1220  * generate a scan completed event if the driver does not report this.
1221  */
1222 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1223 {
1224         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1225 #ifndef HOSTAPD
1226         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1227 #endif /* HOSTAPD */
1228 }
1229
1230
1231 /**
1232  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1233  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1234  * @params: Scan parameters
1235  * Returns: 0 on success, -1 on failure
1236  */
1237 static int wpa_driver_nl80211_scan(void *priv,
1238                                    struct wpa_driver_scan_params *params)
1239 {
1240         struct wpa_driver_nl80211_data *drv = priv;
1241         int ret = 0, timeout;
1242         struct nl_msg *msg, *ssids, *freqs;
1243         size_t i;
1244
1245         msg = nlmsg_alloc();
1246         ssids = nlmsg_alloc();
1247         freqs = nlmsg_alloc();
1248         if (!msg || !ssids || !freqs) {
1249                 nlmsg_free(msg);
1250                 nlmsg_free(ssids);
1251                 nlmsg_free(freqs);
1252                 return -1;
1253         }
1254
1255         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1256                     NL80211_CMD_TRIGGER_SCAN, 0);
1257
1258         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1259
1260         for (i = 0; i < params->num_ssids; i++) {
1261                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1262                         params->ssids[i].ssid);
1263         }
1264         if (params->num_ssids)
1265                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1266
1267         if (params->extra_ies) {
1268                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1269                         params->extra_ies);
1270         }
1271
1272         if (params->freqs) {
1273                 for (i = 0; params->freqs[i]; i++)
1274                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1275                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1276         }
1277
1278         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1279         msg = NULL;
1280         if (ret) {
1281                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1282                            "(%s)", ret, strerror(-ret));
1283                 goto nla_put_failure;
1284         }
1285
1286         /* Not all drivers generate "scan completed" wireless event, so try to
1287          * read results after a timeout. */
1288         timeout = 10;
1289         if (drv->scan_complete_events) {
1290                 /*
1291                  * The driver seems to deliver events to notify when scan is
1292                  * complete, so use longer timeout to avoid race conditions
1293                  * with scanning and following association request.
1294                  */
1295                 timeout = 30;
1296         }
1297         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1298                    "seconds", ret, timeout);
1299         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1300         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1301                                drv, drv->ctx);
1302
1303 nla_put_failure:
1304         nlmsg_free(ssids);
1305         nlmsg_free(msg);
1306         nlmsg_free(freqs);
1307         return ret;
1308 }
1309
1310
1311 static int bss_info_handler(struct nl_msg *msg, void *arg)
1312 {
1313         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1314         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1315         struct nlattr *bss[NL80211_BSS_MAX + 1];
1316         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1317                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1318                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1319                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1320                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1321                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1322                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1323                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1324                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1325         };
1326         struct wpa_scan_results *res = arg;
1327         struct wpa_scan_res **tmp;
1328         struct wpa_scan_res *r;
1329         const u8 *ie;
1330         size_t ie_len;
1331
1332         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1333                   genlmsg_attrlen(gnlh, 0), NULL);
1334         if (!tb[NL80211_ATTR_BSS])
1335                 return NL_SKIP;
1336         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1337                              bss_policy))
1338                 return NL_SKIP;
1339         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1340                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1341                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1342         } else {
1343                 ie = NULL;
1344                 ie_len = 0;
1345         }
1346
1347         r = os_zalloc(sizeof(*r) + ie_len);
1348         if (r == NULL)
1349                 return NL_SKIP;
1350         if (bss[NL80211_BSS_BSSID])
1351                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1352                           ETH_ALEN);
1353         if (bss[NL80211_BSS_FREQUENCY])
1354                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1355         if (bss[NL80211_BSS_BEACON_INTERVAL])
1356                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1357         if (bss[NL80211_BSS_CAPABILITY])
1358                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1359         r->flags |= WPA_SCAN_NOISE_INVALID;
1360         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1361                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1362                 r->level /= 100; /* mBm to dBm */
1363                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1364         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1365                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1366                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1367         } else
1368                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1369         if (bss[NL80211_BSS_TSF])
1370                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1371         r->ie_len = ie_len;
1372         if (ie)
1373                 os_memcpy(r + 1, ie, ie_len);
1374
1375         tmp = os_realloc(res->res,
1376                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1377         if (tmp == NULL) {
1378                 os_free(r);
1379                 return NL_SKIP;
1380         }
1381         tmp[res->num++] = r;
1382         res->res = tmp;
1383
1384         return NL_SKIP;
1385 }
1386
1387
1388 /**
1389  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1390  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1391  * Returns: Scan results on success, -1 on failure
1392  */
1393 static struct wpa_scan_results *
1394 wpa_driver_nl80211_get_scan_results(void *priv)
1395 {
1396         struct wpa_driver_nl80211_data *drv = priv;
1397         struct nl_msg *msg;
1398         struct wpa_scan_results *res;
1399         int ret;
1400
1401         res = os_zalloc(sizeof(*res));
1402         if (res == NULL)
1403                 return 0;
1404         msg = nlmsg_alloc();
1405         if (!msg)
1406                 goto nla_put_failure;
1407
1408         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1409                     NL80211_CMD_GET_SCAN, 0);
1410         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1411
1412         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1413         msg = NULL;
1414         if (ret == 0) {
1415                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1416                            (unsigned long) res->num);
1417                 return res;
1418         }
1419         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1420                    "(%s)", ret, strerror(-ret));
1421 nla_put_failure:
1422         nlmsg_free(msg);
1423         wpa_scan_results_free(res);
1424         return NULL;
1425 }
1426
1427
1428 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1429                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1430                        const u8 *seq, size_t seq_len,
1431                        const u8 *key, size_t key_len)
1432 {
1433         struct nl_msg *msg;
1434         int ret;
1435
1436         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1437                    "set_tx=%d seq_len=%lu key_len=%lu",
1438                    __func__, ifindex, alg, addr, key_idx, set_tx,
1439                    (unsigned long) seq_len, (unsigned long) key_len);
1440
1441         msg = nlmsg_alloc();
1442         if (!msg)
1443                 return -ENOMEM;
1444
1445         if (alg == WPA_ALG_NONE) {
1446                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1447                             0, NL80211_CMD_DEL_KEY, 0);
1448         } else {
1449                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1450                             0, NL80211_CMD_NEW_KEY, 0);
1451                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1452                 switch (alg) {
1453                 case WPA_ALG_WEP:
1454                         if (key_len == 5)
1455                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1456                                             0x000FAC01);
1457                         else
1458                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1459                                             0x000FAC05);
1460                         break;
1461                 case WPA_ALG_TKIP:
1462                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1463                         break;
1464                 case WPA_ALG_CCMP:
1465                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1466                         break;
1467                 case WPA_ALG_IGTK:
1468                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1469                         break;
1470                 default:
1471                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1472                                    "algorithm %d", __func__, alg);
1473                         nlmsg_free(msg);
1474                         return -1;
1475                 }
1476         }
1477
1478         if (seq)
1479                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1480
1481         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1482         {
1483                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1484                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1485         }
1486         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1487         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1488
1489         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1490         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1491                 ret = 0;
1492         if (ret)
1493                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1494                            ret, strerror(-ret));
1495
1496         /*
1497          * If we failed or don't need to set the default TX key (below),
1498          * we're done here.
1499          */
1500         if (ret || !set_tx || alg == WPA_ALG_NONE)
1501                 return ret;
1502 #ifdef HOSTAPD /* FIX: is this needed? */
1503         if (addr)
1504                 return ret;
1505 #endif /* HOSTAPD */
1506
1507         msg = nlmsg_alloc();
1508         if (!msg)
1509                 return -ENOMEM;
1510
1511         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1512                     0, NL80211_CMD_SET_KEY, 0);
1513         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1514         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1515         if (alg == WPA_ALG_IGTK)
1516                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1517         else
1518                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1519
1520         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1521         if (ret == -ENOENT)
1522                 ret = 0;
1523         if (ret)
1524                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1525                            "err=%d %s)", ret, strerror(-ret));
1526         return ret;
1527
1528 nla_put_failure:
1529         return -ENOBUFS;
1530 }
1531
1532
1533 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1534                                       const u8 *addr, int key_idx,
1535                                       int set_tx, const u8 *seq,
1536                                       size_t seq_len,
1537                                       const u8 *key, size_t key_len)
1538 {
1539         struct wpa_driver_nl80211_data *drv = priv;
1540         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1541                            seq_len, key, key_len);
1542 }
1543
1544
1545 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1546                                    const u8 *addr, int cmd, u16 reason_code)
1547 {
1548         int ret = -1;
1549         struct nl_msg *msg;
1550
1551         msg = nlmsg_alloc();
1552         if (!msg)
1553                 return -1;
1554
1555         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1556
1557         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1558         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1559         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1560
1561         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1562         msg = NULL;
1563         if (ret) {
1564                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1565                            "(%s)", ret, strerror(-ret));
1566                 goto nla_put_failure;
1567         }
1568         ret = 0;
1569
1570 nla_put_failure:
1571         nlmsg_free(msg);
1572         return ret;
1573 }
1574
1575
1576 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1577                                              int reason_code)
1578 {
1579         struct wpa_driver_nl80211_data *drv = priv;
1580         wpa_printf(MSG_DEBUG, "%s", __func__);
1581         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1582                                        reason_code);
1583 }
1584
1585
1586 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1587                                            int reason_code)
1588 {
1589         struct wpa_driver_nl80211_data *drv = priv;
1590         wpa_printf(MSG_DEBUG, "%s", __func__);
1591         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1592                                        reason_code);
1593 }
1594
1595
1596 static int wpa_driver_nl80211_authenticate(
1597         void *priv, struct wpa_driver_auth_params *params)
1598 {
1599         struct wpa_driver_nl80211_data *drv = priv;
1600         int ret = -1, i;
1601         struct nl_msg *msg;
1602         enum nl80211_auth_type type;
1603
1604         drv->associated = 0;
1605
1606         msg = nlmsg_alloc();
1607         if (!msg)
1608                 return -1;
1609
1610         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1611                    drv->ifindex);
1612
1613         for (i = 0; i < 4; i++) {
1614                 if (!params->wep_key[i])
1615                         continue;
1616                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1617                                            i == params->wep_tx_keyidx, NULL, 0,
1618                                            params->wep_key[i],
1619                                            params->wep_key_len[i]);
1620         }
1621
1622         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1623                     NL80211_CMD_AUTHENTICATE, 0);
1624
1625         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1626         if (params->bssid) {
1627                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1628                            MAC2STR(params->bssid));
1629                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1630         }
1631         if (params->freq) {
1632                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1633                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1634         }
1635         if (params->ssid) {
1636                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1637                                   params->ssid, params->ssid_len);
1638                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1639                         params->ssid);
1640         }
1641         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1642         if (params->ie)
1643                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1644         /*
1645          * TODO: if multiple auth_alg options enabled, try them one by one if
1646          * the AP rejects authentication due to unknown auth alg
1647          */
1648         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1649                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1650         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1651                 type = NL80211_AUTHTYPE_SHARED_KEY;
1652         else if (params->auth_alg & AUTH_ALG_LEAP)
1653                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1654         else if (params->auth_alg & AUTH_ALG_FT)
1655                 type = NL80211_AUTHTYPE_FT;
1656         else
1657                 goto nla_put_failure;
1658         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1659         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1660
1661         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1662         msg = NULL;
1663         if (ret) {
1664                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1665                            "(%s)", ret, strerror(-ret));
1666                 goto nla_put_failure;
1667         }
1668         ret = 0;
1669         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1670                    "successfully");
1671
1672 nla_put_failure:
1673         nlmsg_free(msg);
1674         return ret;
1675 }
1676
1677
1678 #if defined(CONFIG_AP) || defined(HOSTAPD)
1679
1680 struct phy_info_arg {
1681         u16 *num_modes;
1682         struct hostapd_hw_modes *modes;
1683 };
1684
1685 static int phy_info_handler(struct nl_msg *msg, void *arg)
1686 {
1687         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1688         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1689         struct phy_info_arg *phy_info = arg;
1690
1691         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1692
1693         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1694         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1695                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1696                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1697                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1698                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1699                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1700                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1701         };
1702
1703         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1704         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1705                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1706                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1707         };
1708
1709         struct nlattr *nl_band;
1710         struct nlattr *nl_freq;
1711         struct nlattr *nl_rate;
1712         int rem_band, rem_freq, rem_rate;
1713         struct hostapd_hw_modes *mode;
1714         int idx, mode_is_set;
1715
1716         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1717                   genlmsg_attrlen(gnlh, 0), NULL);
1718
1719         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1720                 return NL_SKIP;
1721
1722         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1723                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1724                 if (!mode)
1725                         return NL_SKIP;
1726                 phy_info->modes = mode;
1727
1728                 mode_is_set = 0;
1729
1730                 mode = &phy_info->modes[*(phy_info->num_modes)];
1731                 memset(mode, 0, sizeof(*mode));
1732                 *(phy_info->num_modes) += 1;
1733
1734                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1735                           nla_len(nl_band), NULL);
1736
1737                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1738                         mode->ht_capab = nla_get_u16(
1739                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1740                 }
1741
1742                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1743                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1744                                   nla_len(nl_freq), freq_policy);
1745                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1746                                 continue;
1747                         mode->num_channels++;
1748                 }
1749
1750                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1751                 if (!mode->channels)
1752                         return NL_SKIP;
1753
1754                 idx = 0;
1755
1756                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1757                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1758                                   nla_len(nl_freq), freq_policy);
1759                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1760                                 continue;
1761
1762                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1763                         mode->channels[idx].flag = 0;
1764
1765                         if (!mode_is_set) {
1766                                 /* crude heuristic */
1767                                 if (mode->channels[idx].freq < 4000)
1768                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1769                                 else
1770                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1771                                 mode_is_set = 1;
1772                         }
1773
1774                         /* crude heuristic */
1775                         if (mode->channels[idx].freq < 4000)
1776                                 if (mode->channels[idx].freq == 2484)
1777                                         mode->channels[idx].chan = 14;
1778                                 else
1779                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1780                         else
1781                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1782
1783                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1784                                 mode->channels[idx].flag |=
1785                                         HOSTAPD_CHAN_DISABLED;
1786                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1787                                 mode->channels[idx].flag |=
1788                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1789                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1790                                 mode->channels[idx].flag |=
1791                                         HOSTAPD_CHAN_NO_IBSS;
1792                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1793                                 mode->channels[idx].flag |=
1794                                         HOSTAPD_CHAN_RADAR;
1795
1796                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1797                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1798                                 mode->channels[idx].max_tx_power =
1799                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1800
1801                         idx++;
1802                 }
1803
1804                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1805                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1806                                   nla_len(nl_rate), rate_policy);
1807                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1808                                 continue;
1809                         mode->num_rates++;
1810                 }
1811
1812                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1813                 if (!mode->rates)
1814                         return NL_SKIP;
1815
1816                 idx = 0;
1817
1818                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1819                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1820                                   nla_len(nl_rate), rate_policy);
1821                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1822                                 continue;
1823                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1824
1825                         /* crude heuristic */
1826                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1827                             mode->rates[idx].rate > 200)
1828                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1829
1830                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1831                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1832
1833                         idx++;
1834                 }
1835         }
1836
1837         return NL_SKIP;
1838 }
1839
1840 static struct hostapd_hw_modes *
1841 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1842 {
1843         u16 m;
1844         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1845         int i, mode11g_idx = -1;
1846
1847         /* If only 802.11g mode is included, use it to construct matching
1848          * 802.11b mode data. */
1849
1850         for (m = 0; m < *num_modes; m++) {
1851                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1852                         return modes; /* 802.11b already included */
1853                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1854                         mode11g_idx = m;
1855         }
1856
1857         if (mode11g_idx < 0)
1858                 return modes; /* 2.4 GHz band not supported at all */
1859
1860         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1861         if (nmodes == NULL)
1862                 return modes; /* Could not add 802.11b mode */
1863
1864         mode = &nmodes[*num_modes];
1865         os_memset(mode, 0, sizeof(*mode));
1866         (*num_modes)++;
1867         modes = nmodes;
1868
1869         mode->mode = HOSTAPD_MODE_IEEE80211B;
1870
1871         mode11g = &modes[mode11g_idx];
1872         mode->num_channels = mode11g->num_channels;
1873         mode->channels = os_malloc(mode11g->num_channels *
1874                                    sizeof(struct hostapd_channel_data));
1875         if (mode->channels == NULL) {
1876                 (*num_modes)--;
1877                 return modes; /* Could not add 802.11b mode */
1878         }
1879         os_memcpy(mode->channels, mode11g->channels,
1880                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
1881
1882         mode->num_rates = 0;
1883         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1884         if (mode->rates == NULL) {
1885                 os_free(mode->channels);
1886                 (*num_modes)--;
1887                 return modes; /* Could not add 802.11b mode */
1888         }
1889
1890         for (i = 0; i < mode11g->num_rates; i++) {
1891                 if (mode11g->rates[i].rate > 110 ||
1892                     mode11g->rates[i].flags &
1893                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1894                         continue;
1895                 mode->rates[mode->num_rates] = mode11g->rates[i];
1896                 mode->num_rates++;
1897                 if (mode->num_rates == 4)
1898                         break;
1899         }
1900
1901         if (mode->num_rates == 0) {
1902                 os_free(mode->channels);
1903                 os_free(mode->rates);
1904                 (*num_modes)--;
1905                 return modes; /* No 802.11b rates */
1906         }
1907
1908         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1909                    "information");
1910
1911         return modes;
1912 }
1913
1914
1915 static struct hostapd_hw_modes *
1916 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1917 {
1918         struct wpa_driver_nl80211_data *drv = priv;
1919         struct nl_msg *msg;
1920         struct phy_info_arg result = {
1921                 .num_modes = num_modes,
1922                 .modes = NULL,
1923         };
1924
1925         *num_modes = 0;
1926         *flags = 0;
1927
1928         msg = nlmsg_alloc();
1929         if (!msg)
1930                 return NULL;
1931
1932         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1933                     0, NL80211_CMD_GET_WIPHY, 0);
1934
1935         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1936
1937         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1938                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1939  nla_put_failure:
1940         return NULL;
1941 }
1942
1943
1944 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1945                                          const void *data, size_t len,
1946                                          int encrypt)
1947 {
1948         __u8 rtap_hdr[] = {
1949                 0x00, 0x00, /* radiotap version */
1950                 0x0e, 0x00, /* radiotap length */
1951                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1952                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1953                 0x00,       /* padding */
1954                 0x00, 0x00, /* RX and TX flags to indicate that */
1955                 0x00, 0x00, /* this is the injected frame directly */
1956         };
1957         struct iovec iov[2] = {
1958                 {
1959                         .iov_base = &rtap_hdr,
1960                         .iov_len = sizeof(rtap_hdr),
1961                 },
1962                 {
1963                         .iov_base = (void *) data,
1964                         .iov_len = len,
1965                 }
1966         };
1967         struct msghdr msg = {
1968                 .msg_name = NULL,
1969                 .msg_namelen = 0,
1970                 .msg_iov = iov,
1971                 .msg_iovlen = 2,
1972                 .msg_control = NULL,
1973                 .msg_controllen = 0,
1974                 .msg_flags = 0,
1975         };
1976
1977         if (encrypt)
1978                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
1979
1980         return sendmsg(drv->monitor_sock, &msg, 0);
1981 }
1982
1983
1984 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
1985                                         size_t data_len)
1986 {
1987         struct wpa_driver_nl80211_data *drv = priv;
1988         struct ieee80211_mgmt *mgmt;
1989         int do_not_encrypt = 0;
1990         u16 fc;
1991
1992         mgmt = (struct ieee80211_mgmt *) data;
1993         fc = le_to_host16(mgmt->frame_control);
1994
1995         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
1996             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
1997                 /*
1998                  * Only one of the authentication frame types is encrypted.
1999                  * In order for static WEP encryption to work properly (i.e.,
2000                  * to not encrypt the frame), we need to tell mac80211 about
2001                  * the frames that must not be encrypted.
2002                  */
2003                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2004                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2005                 if (auth_alg == WLAN_AUTH_OPEN ||
2006                     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2007                         do_not_encrypt = 1;
2008         }
2009
2010         return wpa_driver_nl80211_send_frame(drv, data, data_len,
2011                                              !do_not_encrypt);
2012 }
2013
2014
2015 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2016                                                const u8 *head, size_t head_len,
2017                                                const u8 *tail, size_t tail_len,
2018                                                int dtim_period)
2019 {
2020         struct wpa_driver_nl80211_data *drv = priv;
2021         struct nl_msg *msg;
2022         u8 cmd = NL80211_CMD_NEW_BEACON;
2023         int ret;
2024         int beacon_set;
2025 #ifdef HOSTAPD
2026         struct i802_bss *bss;
2027
2028         bss = get_bss(drv, ifindex);
2029         if (bss == NULL)
2030                 return -ENOENT;
2031         beacon_set = bss->beacon_set;
2032 #else /* HOSTAPD */
2033         beacon_set = drv->beacon_set;
2034 #endif /* HOSTAPD */
2035
2036         msg = nlmsg_alloc();
2037         if (!msg)
2038                 return -ENOMEM;
2039
2040         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2041                    beacon_set);
2042         if (beacon_set)
2043                 cmd = NL80211_CMD_SET_BEACON;
2044
2045         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2046                     0, cmd, 0);
2047         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2048         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2049         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2050         if (!drv->beacon_int)
2051                 drv->beacon_int = 100;
2052         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2053         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2054
2055         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2056         if (ret) {
2057                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2058                            ret, strerror(-ret));
2059         } else {
2060 #ifdef HOSTAPD
2061                 bss->beacon_set = 1;
2062 #else /* HOSTAPD */
2063                 drv->beacon_set = 1;
2064 #endif /* HOSTAPD */
2065         }
2066         return ret;
2067  nla_put_failure:
2068         return -ENOBUFS;
2069 }
2070
2071
2072 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2073 {
2074         struct wpa_driver_nl80211_data *drv = priv;
2075         struct nl_msg *msg;
2076
2077         drv->beacon_int = value;
2078
2079 #ifdef HOSTAPD
2080         if (!drv->bss.beacon_set)
2081                 return 0;
2082 #else /* HOSTAPD */
2083         if (!drv->beacon_set)
2084                 return 0;
2085 #endif /* HOSTAPD */
2086
2087         msg = nlmsg_alloc();
2088         if (!msg)
2089                 return -ENOMEM;
2090
2091         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2092         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2093                     0, NL80211_CMD_SET_BEACON, 0);
2094         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2095
2096         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2097
2098         return send_and_recv_msgs(drv, msg, NULL, NULL);
2099  nla_put_failure:
2100         return -ENOBUFS;
2101 }
2102
2103
2104 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2105                                        int freq, int ht_enabled,
2106                                        int sec_channel_offset)
2107 {
2108         struct nl_msg *msg;
2109         int ret;
2110
2111         msg = nlmsg_alloc();
2112         if (!msg)
2113                 return -1;
2114
2115         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2116                     NL80211_CMD_SET_WIPHY, 0);
2117
2118         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2119         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2120         if (ht_enabled) {
2121                 switch (sec_channel_offset) {
2122                 case -1:
2123                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2124                                     NL80211_CHAN_HT40MINUS);
2125                         break;
2126                 case 1:
2127                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2128                                     NL80211_CHAN_HT40PLUS);
2129                         break;
2130                 default:
2131                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2132                                     NL80211_CHAN_HT20);
2133                         break;
2134                 }
2135         }
2136
2137         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2138         if (ret == 0)
2139                 return 0;
2140         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2141                    "%d (%s)", freq, ret, strerror(-ret));
2142 nla_put_failure:
2143         return -1;
2144 }
2145
2146 #endif /* CONFIG_AP || HOSTAPD */
2147
2148
2149 #ifdef CONFIG_AP
2150
2151 static int wpa_driver_nl80211_set_beacon(void *priv,
2152                                          const u8 *head, size_t head_len,
2153                                          const u8 *tail, size_t tail_len,
2154                                          int dtim_period)
2155 {
2156         struct wpa_driver_nl80211_data *drv = priv;
2157         return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2158                                                    head, head_len,
2159                                                    tail, tail_len,
2160                                                    dtim_period);
2161 }
2162
2163 #endif /* CONFIG_AP */
2164
2165 #if defined(CONFIG_AP) || defined(HOSTAPD)
2166
2167 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2168                                  int ifidx)
2169 {
2170         struct nl_msg *msg;
2171
2172 #ifdef HOSTAPD
2173         /* stop listening for EAPOL on this interface */
2174         del_ifidx(drv, ifidx);
2175 #endif /* HOSTAPD */
2176
2177         msg = nlmsg_alloc();
2178         if (!msg)
2179                 goto nla_put_failure;
2180
2181         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2182                     0, NL80211_CMD_DEL_INTERFACE, 0);
2183         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2184
2185         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2186                 return;
2187  nla_put_failure:
2188         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2189                    ifidx);
2190 }
2191
2192
2193 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2194                                 const char *ifname, enum nl80211_iftype iftype,
2195                                 const u8 *addr)
2196 {
2197         struct nl_msg *msg, *flags = NULL;
2198         int ifidx;
2199         int ret = -ENOBUFS;
2200 #ifdef HOSTAPD
2201         struct ifreq ifreq;
2202         struct iwreq iwr;
2203 #endif /* HOSTAPD */
2204
2205         msg = nlmsg_alloc();
2206         if (!msg)
2207                 return -1;
2208
2209         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2210                     0, NL80211_CMD_NEW_INTERFACE, 0);
2211         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2212         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2213         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2214
2215         if (iftype == NL80211_IFTYPE_MONITOR) {
2216                 int err;
2217
2218                 flags = nlmsg_alloc();
2219                 if (!flags)
2220                         goto nla_put_failure;
2221
2222                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2223
2224                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2225
2226                 nlmsg_free(flags);
2227
2228                 if (err)
2229                         goto nla_put_failure;
2230         }
2231
2232         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2233         if (ret) {
2234  nla_put_failure:
2235                 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2236                            ifname);
2237                 return ret;
2238         }
2239
2240         ifidx = if_nametoindex(ifname);
2241
2242         if (ifidx <= 0)
2243                 return -1;
2244
2245 #ifdef HOSTAPD
2246         /* start listening for EAPOL on this interface */
2247         add_ifidx(drv, ifidx);
2248
2249         if (addr) {
2250                 switch (iftype) {
2251                 case NL80211_IFTYPE_AP:
2252                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
2253                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
2254                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2255
2256                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
2257                                 nl80211_remove_iface(drv, ifidx);
2258                                 return -1;
2259                         }
2260                         break;
2261                 case NL80211_IFTYPE_WDS:
2262                         memset(&iwr, 0, sizeof(iwr));
2263                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
2264                         iwr.u.addr.sa_family = ARPHRD_ETHER;
2265                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
2266                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
2267                                 return -1;
2268                         break;
2269                 default:
2270                         /* nothing */
2271                         break;
2272                 }
2273         }
2274 #endif /* HOSTAPD */
2275
2276         return ifidx;
2277 }
2278
2279 #endif /* CONFIG_AP || HOSTAPD */
2280
2281 #ifdef CONFIG_AP
2282
2283 void ap_tx_status(void *ctx, const u8 *addr,
2284                   const u8 *buf, size_t len, int ack);
2285 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2286 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2287                 struct hostapd_frame_info *fi);
2288 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2289
2290 #endif /* CONFIG_AP */
2291
2292 #if defined(CONFIG_AP) || defined(HOSTAPD)
2293
2294 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2295 {
2296         struct ieee80211_hdr *hdr;
2297         u16 fc, type, stype;
2298
2299         hdr = (struct ieee80211_hdr *) buf;
2300         fc = le_to_host16(hdr->frame_control);
2301
2302         type = WLAN_FC_GET_TYPE(fc);
2303         stype = WLAN_FC_GET_STYPE(fc);
2304
2305         switch (type) {
2306         case WLAN_FC_TYPE_MGMT:
2307                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2308                            ok ? "ACK" : "fail");
2309 #ifdef HOSTAPD
2310                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2311 #else /* HOSTAPD */
2312                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2313 #endif /* HOSTAPD */
2314                 break;
2315         case WLAN_FC_TYPE_CTRL:
2316                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2317                            ok ? "ACK" : "fail");
2318                 break;
2319         case WLAN_FC_TYPE_DATA:
2320 #ifdef HOSTAPD
2321                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2322 #else /* HOSTAPD */
2323                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2324 #endif /* HOSTAPD */
2325                 break;
2326         default:
2327                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2328                            type);
2329                 break;
2330         }
2331 }
2332
2333 #endif /* CONFIG_AP || HOSTAPD */
2334
2335 #ifdef CONFIG_AP
2336
2337 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2338                          u8 *buf, size_t len,
2339                          struct hostapd_frame_info *hfi,
2340                          enum ieee80211_msg_type msg_type)
2341 {
2342         struct ieee80211_hdr *hdr;
2343         u16 fc, type, stype;
2344         size_t data_len = len;
2345
2346         /*
2347          * PS-Poll frames are 16 bytes. All other frames are
2348          * 24 bytes or longer.
2349          */
2350         if (len < 16)
2351                 return;
2352
2353         hdr = (struct ieee80211_hdr *) buf;
2354         fc = le_to_host16(hdr->frame_control);
2355
2356         type = WLAN_FC_GET_TYPE(fc);
2357         stype = WLAN_FC_GET_STYPE(fc);
2358
2359         switch (type) {
2360         case WLAN_FC_TYPE_DATA:
2361                 if (len < 24)
2362                         return;
2363                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2364                 case WLAN_FC_TODS:
2365                         break;
2366                 case WLAN_FC_FROMDS:
2367                         break;
2368                 default:
2369                         /* discard */
2370                         return;
2371                 }
2372                 break;
2373         case WLAN_FC_TYPE_CTRL:
2374                 /* discard non-ps-poll frames */
2375                 if (stype != WLAN_FC_STYPE_PSPOLL)
2376                         return;
2377                 break;
2378         case WLAN_FC_TYPE_MGMT:
2379                 break;
2380         default:
2381                 /* discard */
2382                 return;
2383         }
2384
2385         switch (msg_type) {
2386         case ieee80211_msg_normal:
2387                 /* continue processing */
2388                 break;
2389         case ieee80211_msg_tx_callback_ack:
2390                 handle_tx_callback(drv->ctx, buf, data_len, 1);
2391                 return;
2392         case ieee80211_msg_tx_callback_fail:
2393                 handle_tx_callback(drv->ctx, buf, data_len, 0);
2394                 return;
2395         }
2396
2397         switch (type) {
2398         case WLAN_FC_TYPE_MGMT:
2399                 if (stype != WLAN_FC_STYPE_BEACON &&
2400                     stype != WLAN_FC_STYPE_PROBE_REQ)
2401                         wpa_printf(MSG_MSGDUMP, "MGMT");
2402                 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2403                 break;
2404         case WLAN_FC_TYPE_CTRL:
2405                 /* can only get here with PS-Poll frames */
2406                 wpa_printf(MSG_DEBUG, "CTRL");
2407                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2408                 break;
2409         case WLAN_FC_TYPE_DATA:
2410                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2411                 break;
2412         }
2413 }
2414
2415 #endif /* CONFIG_AP */
2416
2417 #if defined(CONFIG_AP) || defined(HOSTAPD)
2418
2419 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2420 {
2421         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2422         int len;
2423         unsigned char buf[3000];
2424         struct ieee80211_radiotap_iterator iter;
2425         int ret;
2426         struct hostapd_frame_info hfi;
2427         int injected = 0, failed = 0, msg_type, rxflags = 0;
2428
2429         len = recv(sock, buf, sizeof(buf), 0);
2430         if (len < 0) {
2431                 perror("recv");
2432                 return;
2433         }
2434
2435         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2436                 printf("received invalid radiotap frame\n");
2437                 return;
2438         }
2439
2440         memset(&hfi, 0, sizeof(hfi));
2441
2442         while (1) {
2443                 ret = ieee80211_radiotap_iterator_next(&iter);
2444                 if (ret == -ENOENT)
2445                         break;
2446                 if (ret) {
2447                         printf("received invalid radiotap frame (%d)\n", ret);
2448                         return;
2449                 }
2450                 switch (iter.this_arg_index) {
2451                 case IEEE80211_RADIOTAP_FLAGS:
2452                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2453                                 len -= 4;
2454                         break;
2455                 case IEEE80211_RADIOTAP_RX_FLAGS:
2456                         rxflags = 1;
2457                         break;
2458                 case IEEE80211_RADIOTAP_TX_FLAGS:
2459                         injected = 1;
2460                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2461                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2462                         break;
2463                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2464                         break;
2465                 case IEEE80211_RADIOTAP_CHANNEL:
2466                         /* TODO convert from freq/flags to channel number
2467                         hfi.channel = XXX;
2468                         hfi.phytype = XXX;
2469                          */
2470                         break;
2471                 case IEEE80211_RADIOTAP_RATE:
2472                         hfi.datarate = *iter.this_arg * 5;
2473                         break;
2474                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2475                         hfi.ssi_signal = *iter.this_arg;
2476                         break;
2477                 }
2478         }
2479
2480         if (rxflags && injected)
2481                 return;
2482
2483         if (!injected)
2484                 msg_type = ieee80211_msg_normal;
2485         else if (failed)
2486                 msg_type = ieee80211_msg_tx_callback_fail;
2487         else
2488                 msg_type = ieee80211_msg_tx_callback_ack;
2489
2490         handle_frame(drv, buf + iter.max_length,
2491                      len - iter.max_length, &hfi, msg_type);
2492 }
2493
2494
2495 /*
2496  * we post-process the filter code later and rewrite
2497  * this to the offset to the last instruction
2498  */
2499 #define PASS    0xFF
2500 #define FAIL    0xFE
2501
2502 static struct sock_filter msock_filter_insns[] = {
2503         /*
2504          * do a little-endian load of the radiotap length field
2505          */
2506         /* load lower byte into A */
2507         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2508         /* put it into X (== index register) */
2509         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2510         /* load upper byte into A */
2511         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2512         /* left-shift it by 8 */
2513         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2514         /* or with X */
2515         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2516         /* put result into X */
2517         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2518
2519         /*
2520          * Allow management frames through, this also gives us those
2521          * management frames that we sent ourselves with status
2522          */
2523         /* load the lower byte of the IEEE 802.11 frame control field */
2524         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2525         /* mask off frame type and version */
2526         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2527         /* accept frame if it's both 0, fall through otherwise */
2528         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2529
2530         /*
2531          * TODO: add a bit to radiotap RX flags that indicates
2532          * that the sending station is not associated, then
2533          * add a filter here that filters on our DA and that flag
2534          * to allow us to deauth frames to that bad station.
2535          *
2536          * Not a regression -- we didn't do it before either.
2537          */
2538
2539 #if 0
2540         /*
2541          * drop non-data frames, WDS frames
2542          */
2543         /* load the lower byte of the frame control field */
2544         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2545         /* mask off QoS bit */
2546         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2547         /* drop non-data frames */
2548         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2549         /* load the upper byte of the frame control field */
2550         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2551         /* mask off toDS/fromDS */
2552         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2553         /* drop WDS frames */
2554         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2555 #endif
2556
2557         /*
2558          * add header length to index
2559          */
2560         /* load the lower byte of the frame control field */
2561         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2562         /* mask off QoS bit */
2563         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2564         /* right shift it by 6 to give 0 or 2 */
2565         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2566         /* add data frame header length */
2567         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2568         /* add index, was start of 802.11 header */
2569         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2570         /* move to index, now start of LL header */
2571         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2572
2573         /*
2574          * Accept empty data frames, we use those for
2575          * polling activity.
2576          */
2577         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2578         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2579
2580         /*
2581          * Accept EAPOL frames
2582          */
2583         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2584         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2585         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2586         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2587
2588         /* keep these last two statements or change the code below */
2589         /* return 0 == "DROP" */
2590         BPF_STMT(BPF_RET | BPF_K, 0),
2591         /* return ~0 == "keep all" */
2592         BPF_STMT(BPF_RET | BPF_K, ~0),
2593 };
2594
2595 static struct sock_fprog msock_filter = {
2596         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2597         .filter = msock_filter_insns,
2598 };
2599
2600
2601 static int add_monitor_filter(int s)
2602 {
2603         int idx;
2604
2605         /* rewrite all PASS/FAIL jump offsets */
2606         for (idx = 0; idx < msock_filter.len; idx++) {
2607                 struct sock_filter *insn = &msock_filter_insns[idx];
2608
2609                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2610                         if (insn->code == (BPF_JMP|BPF_JA)) {
2611                                 if (insn->k == PASS)
2612                                         insn->k = msock_filter.len - idx - 2;
2613                                 else if (insn->k == FAIL)
2614                                         insn->k = msock_filter.len - idx - 3;
2615                         }
2616
2617                         if (insn->jt == PASS)
2618                                 insn->jt = msock_filter.len - idx - 2;
2619                         else if (insn->jt == FAIL)
2620                                 insn->jt = msock_filter.len - idx - 3;
2621
2622                         if (insn->jf == PASS)
2623                                 insn->jf = msock_filter.len - idx - 2;
2624                         else if (insn->jf == FAIL)
2625                                 insn->jf = msock_filter.len - idx - 3;
2626                 }
2627         }
2628
2629         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2630                        &msock_filter, sizeof(msock_filter))) {
2631                 perror("SO_ATTACH_FILTER");
2632                 return -1;
2633         }
2634
2635         return 0;
2636 }
2637
2638
2639 static int
2640 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2641 {
2642         char buf[IFNAMSIZ];
2643         struct sockaddr_ll ll;
2644         int optval;
2645         socklen_t optlen;
2646
2647         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2648         buf[IFNAMSIZ - 1] = '\0';
2649
2650         drv->monitor_ifidx =
2651                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2652
2653         if (drv->monitor_ifidx < 0)
2654                 return -1;
2655
2656         if (hostapd_set_iface_flags(drv, buf, 1))
2657                 goto error;
2658
2659         memset(&ll, 0, sizeof(ll));
2660         ll.sll_family = AF_PACKET;
2661         ll.sll_ifindex = drv->monitor_ifidx;
2662         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2663         if (drv->monitor_sock < 0) {
2664                 perror("socket[PF_PACKET,SOCK_RAW]");
2665                 goto error;
2666         }
2667
2668         if (add_monitor_filter(drv->monitor_sock)) {
2669                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2670                            "interface; do filtering in user space");
2671                 /* This works, but will cost in performance. */
2672         }
2673
2674         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2675                 perror("monitor socket bind");
2676                 goto error;
2677         }
2678
2679         optlen = sizeof(optval);
2680         optval = 20;
2681         if (setsockopt
2682             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2683                 perror("Failed to set socket priority");
2684                 goto error;
2685         }
2686
2687         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2688                                      drv, NULL)) {
2689                 printf("Could not register monitor read socket\n");
2690                 goto error;
2691         }
2692
2693         return 0;
2694  error:
2695         nl80211_remove_iface(drv, drv->monitor_ifidx);
2696         return -1;
2697 }
2698
2699 #endif /* CONFIG_AP || HOSTAPD */
2700
2701 #ifdef CONFIG_AP
2702
2703 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2704                                  struct wpa_driver_associate_params *params)
2705 {
2706         if (drv->monitor_ifidx < 0 &&
2707             nl80211_create_monitor_interface(drv))
2708                 return -1;
2709
2710         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2711             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
2712                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2713                 drv->monitor_ifidx = -1;
2714                 return -1;
2715         }
2716
2717         /* TODO: setup monitor interface (and add code somewhere to remove this
2718          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2719
2720         return 0;
2721 }
2722 #endif /* CONFIG_AP */
2723
2724
2725 static int wpa_driver_nl80211_associate(
2726         void *priv, struct wpa_driver_associate_params *params)
2727 {
2728         struct wpa_driver_nl80211_data *drv = priv;
2729         int ret = -1;
2730         struct nl_msg *msg;
2731
2732 #ifdef CONFIG_AP
2733         if (params->mode == 2)
2734                 return wpa_driver_nl80211_ap(drv, params);
2735 #endif /* CONFIG_AP */
2736
2737         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2738                                           params->drop_unencrypted);
2739
2740         drv->associated = 0;
2741
2742         msg = nlmsg_alloc();
2743         if (!msg)
2744                 return -1;
2745
2746         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2747                    drv->ifindex);
2748         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2749                     NL80211_CMD_ASSOCIATE, 0);
2750
2751         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2752         if (params->bssid) {
2753                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2754                            MAC2STR(params->bssid));
2755                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2756         }
2757         if (params->freq) {
2758                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2759                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2760         }
2761         if (params->ssid) {
2762                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2763                                   params->ssid, params->ssid_len);
2764                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2765                         params->ssid);
2766                 if (params->ssid_len > sizeof(drv->ssid))
2767                         goto nla_put_failure;
2768                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2769                 drv->ssid_len = params->ssid_len;
2770         }
2771         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
2772         if (params->wpa_ie)
2773                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2774                         params->wpa_ie);
2775
2776         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2777         msg = NULL;
2778         if (ret) {
2779                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2780                            "(%s)", ret, strerror(-ret));
2781                 goto nla_put_failure;
2782         }
2783         ret = 0;
2784         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2785                    "successfully");
2786
2787 nla_put_failure:
2788         nlmsg_free(msg);
2789         return ret;
2790 }
2791
2792
2793 /**
2794  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2795  * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2796  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2797  * Returns: 0 on success, -1 on failure
2798  */
2799 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2800                                        int mode)
2801 {
2802         int ret = -1;
2803         struct nl_msg *msg;
2804         int nlmode;
2805
2806         switch (mode) {
2807         case 0:
2808                 nlmode = NL80211_IFTYPE_STATION;
2809                 break;
2810         case 1:
2811                 nlmode = NL80211_IFTYPE_ADHOC;
2812                 break;
2813         case 2:
2814                 nlmode = NL80211_IFTYPE_AP;
2815                 break;
2816         default:
2817                 return -1;
2818         }
2819
2820         msg = nlmsg_alloc();
2821         if (!msg)
2822                 return -1;
2823
2824         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2825                     0, NL80211_CMD_SET_INTERFACE, 0);
2826         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2827         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2828
2829         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2830         if (!ret)
2831                 return 0;
2832         else
2833                 goto try_again;
2834
2835 nla_put_failure:
2836         wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2837                    ret, strerror(-ret));
2838         return -1;
2839
2840 try_again:
2841         /* mac80211 doesn't allow mode changes while the device is up, so
2842          * take the device down, try to set the mode again, and bring the
2843          * device back up.
2844          */
2845         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2846                 /* Try to set the mode again while the interface is down */
2847                 msg = nlmsg_alloc();
2848                 if (!msg)
2849                         return -1;
2850
2851                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2852                             0, NL80211_CMD_SET_INTERFACE, 0);
2853                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2854                 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2855                 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2856                 if (ret) {
2857                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
2858                                    "mode(try_again): %d (%s)",
2859                                    drv->ifname, ret, strerror(-ret));
2860                 }
2861
2862                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2863                         ret = -1;
2864         }
2865
2866         return ret;
2867 }
2868
2869
2870 static int wpa_driver_nl80211_get_capa(void *priv,
2871                                        struct wpa_driver_capa *capa)
2872 {
2873         struct wpa_driver_nl80211_data *drv = priv;
2874         if (!drv->has_capability)
2875                 return -1;
2876         os_memcpy(capa, &drv->capa, sizeof(*capa));
2877         return 0;
2878 }
2879
2880
2881 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2882 {
2883         struct wpa_driver_nl80211_data *drv = priv;
2884
2885         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2886                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2887         drv->operstate = state;
2888         return wpa_driver_nl80211_send_oper_ifla(
2889                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2890 }
2891
2892
2893 #ifdef HOSTAPD
2894
2895 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2896
2897 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2898 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2899
2900
2901 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2902                                  int ifindex)
2903 {
2904         struct i802_bss *bss = &drv->bss;
2905         while (bss) {
2906                 if (ifindex == bss->ifindex)
2907                         return bss;
2908                 bss = bss->next;
2909         }
2910         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
2911         return NULL;
2912 }
2913
2914
2915 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2916 {
2917         int i;
2918         int *old;
2919
2920         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
2921                    ifidx);
2922         for (i = 0; i < drv->num_if_indices; i++) {
2923                 if (drv->if_indices[i] == 0) {
2924                         drv->if_indices[i] = ifidx;
2925                         return;
2926                 }
2927         }
2928
2929         if (drv->if_indices != drv->default_if_indices)
2930                 old = drv->if_indices;
2931         else
2932                 old = NULL;
2933
2934         drv->if_indices = realloc(old,
2935                                   sizeof(int) * (drv->num_if_indices + 1));
2936         if (!drv->if_indices) {
2937                 if (!old)
2938                         drv->if_indices = drv->default_if_indices;
2939                 else
2940                         drv->if_indices = old;
2941                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
2942                            "interfaces");
2943                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
2944                 return;
2945         }
2946         drv->if_indices[drv->num_if_indices] = ifidx;
2947         drv->num_if_indices++;
2948 }
2949
2950
2951 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2952 {
2953         int i;
2954
2955         for (i = 0; i < drv->num_if_indices; i++) {
2956                 if (drv->if_indices[i] == ifidx) {
2957                         drv->if_indices[i] = 0;
2958                         break;
2959                 }
2960         }
2961 }
2962
2963
2964 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2965 {
2966         int i;
2967
2968         for (i = 0; i < drv->num_if_indices; i++)
2969                 if (drv->if_indices[i] == ifidx)
2970                         return 1;
2971
2972         return 0;
2973 }
2974
2975
2976 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
2977                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
2978                         size_t seq_len, const u8 *key, size_t key_len)
2979 {
2980         struct wpa_driver_nl80211_data *drv = priv;
2981         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
2982                            set_tx, seq, seq_len, key, key_len);
2983 }
2984
2985
2986 static inline int min_int(int a, int b)
2987 {
2988         if (a < b)
2989                 return a;
2990         return b;
2991 }
2992
2993
2994 static int get_key_handler(struct nl_msg *msg, void *arg)
2995 {
2996         struct nlattr *tb[NL80211_ATTR_MAX + 1];
2997         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2998
2999         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3000                   genlmsg_attrlen(gnlh, 0), NULL);
3001
3002         /*
3003          * TODO: validate the key index and mac address!
3004          * Otherwise, there's a race condition as soon as
3005          * the kernel starts sending key notifications.
3006          */
3007
3008         if (tb[NL80211_ATTR_KEY_SEQ])
3009                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3010                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3011         return NL_SKIP;
3012 }
3013
3014
3015 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3016                            int idx, u8 *seq)
3017 {
3018         struct wpa_driver_nl80211_data *drv = priv;
3019         struct nl_msg *msg;
3020
3021         msg = nlmsg_alloc();
3022         if (!msg)
3023                 return -ENOMEM;
3024
3025         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3026                     0, NL80211_CMD_GET_KEY, 0);
3027
3028         if (addr)
3029                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3030         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3031         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3032
3033         memset(seq, 0, 6);
3034
3035         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3036  nla_put_failure:
3037         return -ENOBUFS;
3038 }
3039
3040
3041 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3042                               int mode)
3043 {
3044         struct wpa_driver_nl80211_data *drv = priv;
3045         struct nl_msg *msg;
3046         u8 rates[NL80211_MAX_SUPP_RATES];
3047         u8 rates_len = 0;
3048         int i;
3049
3050         msg = nlmsg_alloc();
3051         if (!msg)
3052                 return -ENOMEM;
3053
3054         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3055                     NL80211_CMD_SET_BSS, 0);
3056
3057         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3058                 rates[rates_len++] = basic_rates[i] / 5;
3059
3060         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3061
3062         /* TODO: multi-BSS support */
3063         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3064
3065         return send_and_recv_msgs(drv, msg, NULL, NULL);
3066  nla_put_failure:
3067         return -ENOBUFS;
3068 }
3069
3070
3071 /* Set kernel driver on given frequency (MHz) */
3072 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3073 {
3074         struct wpa_driver_nl80211_data *drv = priv;
3075         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3076                                            freq->sec_channel_offset);
3077 }
3078
3079
3080 static int i802_set_rts(void *priv, int rts)
3081 {
3082         struct wpa_driver_nl80211_data *drv = priv;
3083         struct iwreq iwr;
3084
3085         memset(&iwr, 0, sizeof(iwr));
3086         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3087         iwr.u.rts.value = rts;
3088         iwr.u.rts.fixed = 1;
3089
3090         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3091                 perror("ioctl[SIOCSIWRTS]");
3092                 return -1;
3093         }
3094
3095         return 0;
3096 }
3097
3098
3099 static int i802_set_frag(void *priv, int frag)
3100 {
3101         struct wpa_driver_nl80211_data *drv = priv;
3102         struct iwreq iwr;
3103
3104         memset(&iwr, 0, sizeof(iwr));
3105         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3106         iwr.u.frag.value = frag;
3107         iwr.u.frag.fixed = 1;
3108
3109         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3110                 perror("ioctl[SIOCSIWFRAG]");
3111                 return -1;
3112         }
3113
3114         return 0;
3115 }
3116
3117
3118 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3119 {
3120         struct wpa_driver_nl80211_data *drv = priv;
3121         struct iwreq iwr;
3122
3123         memset(&iwr, 0, sizeof(iwr));
3124         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3125
3126         iwr.u.retry.value = short_retry;
3127         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3128         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3129                 perror("ioctl[SIOCSIWRETRY(short)]");
3130                 return -1;
3131         }
3132
3133         iwr.u.retry.value = long_retry;
3134         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3135         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3136                 perror("ioctl[SIOCSIWRETRY(long)]");
3137                 return -1;
3138         }
3139
3140         return 0;
3141 }
3142
3143
3144 static int i802_flush(void *priv)
3145 {
3146         struct wpa_driver_nl80211_data *drv = priv;
3147         struct nl_msg *msg;
3148
3149         msg = nlmsg_alloc();
3150         if (!msg)
3151                 return -1;
3152
3153         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3154                     0, NL80211_CMD_DEL_STATION, 0);
3155
3156         /*
3157          * XXX: FIX! this needs to flush all VLANs too
3158          */
3159         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3160                     if_nametoindex(drv->ifname));
3161
3162         return send_and_recv_msgs(drv, msg, NULL, NULL);
3163  nla_put_failure:
3164         return -ENOBUFS;
3165 }
3166
3167
3168 static int get_sta_handler(struct nl_msg *msg, void *arg)
3169 {
3170         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3171         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3172         struct hostap_sta_driver_data *data = arg;
3173         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3174         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3175                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3176                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3177                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3178                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3179                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3180         };
3181
3182         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3183                   genlmsg_attrlen(gnlh, 0), NULL);
3184
3185         /*
3186          * TODO: validate the interface and mac address!
3187          * Otherwise, there's a race condition as soon as
3188          * the kernel starts sending station notifications.
3189          */
3190
3191         if (!tb[NL80211_ATTR_STA_INFO]) {
3192                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3193                 return NL_SKIP;
3194         }
3195         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3196                              tb[NL80211_ATTR_STA_INFO],
3197                              stats_policy)) {
3198                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3199                 return NL_SKIP;
3200         }
3201
3202         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3203                 data->inactive_msec =
3204                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3205         if (stats[NL80211_STA_INFO_RX_BYTES])
3206                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3207         if (stats[NL80211_STA_INFO_TX_BYTES])
3208                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3209         if (stats[NL80211_STA_INFO_RX_PACKETS])
3210                 data->rx_packets =
3211                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3212         if (stats[NL80211_STA_INFO_TX_PACKETS])
3213                 data->tx_packets =
3214                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3215
3216         return NL_SKIP;
3217 }
3218
3219 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3220                               const u8 *addr)
3221 {
3222         struct wpa_driver_nl80211_data *drv = priv;
3223         struct nl_msg *msg;
3224
3225         os_memset(data, 0, sizeof(*data));
3226         msg = nlmsg_alloc();
3227         if (!msg)
3228                 return -ENOMEM;
3229
3230         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3231                     0, NL80211_CMD_GET_STATION, 0);
3232
3233         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3234         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3235
3236         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3237  nla_put_failure:
3238         return -ENOBUFS;
3239 }
3240
3241
3242 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3243                            size_t data_len, int encrypt, const u8 *own_addr)
3244 {
3245         struct wpa_driver_nl80211_data *drv = priv;
3246         struct ieee80211_hdr *hdr;
3247         size_t len;
3248         u8 *pos;
3249         int res;
3250 #if 0 /* FIX */
3251         int qos = sta->flags & WLAN_STA_WME;
3252 #else
3253         int qos = 0;
3254 #endif
3255
3256         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3257                 data_len;
3258         hdr = os_zalloc(len);
3259         if (hdr == NULL) {
3260                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3261                        (unsigned long) len);
3262                 return -1;
3263         }
3264
3265         hdr->frame_control =
3266                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3267         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3268         if (encrypt)
3269                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3270 #if 0 /* To be enabled if qos determination is added above */
3271         if (qos) {
3272                 hdr->frame_control |=
3273                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3274         }
3275 #endif
3276
3277         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3278         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3279         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3280         pos = (u8 *) (hdr + 1);
3281
3282 #if 0 /* To be enabled if qos determination is added above */
3283         if (qos) {
3284                 /* add an empty QoS header if needed */
3285                 pos[0] = 0;
3286                 pos[1] = 0;
3287                 pos += 2;
3288         }
3289 #endif
3290
3291         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3292         pos += sizeof(rfc1042_header);
3293         WPA_PUT_BE16(pos, ETH_P_PAE);
3294         pos += 2;
3295         memcpy(pos, data, data_len);
3296
3297         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3298         if (res < 0) {
3299                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3300                            "failed: %d (%s)",
3301                            (unsigned long) len, errno, strerror(errno));
3302         }
3303         free(hdr);
3304
3305         return res;
3306 }
3307
3308
3309 static int i802_sta_add(const char *ifname, void *priv,
3310                         struct hostapd_sta_add_params *params)
3311 {
3312         struct wpa_driver_nl80211_data *drv = priv;
3313         struct nl_msg *msg;
3314         int ret = -ENOBUFS;
3315
3316         msg = nlmsg_alloc();
3317         if (!msg)
3318                 return -ENOMEM;
3319
3320         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3321                     0, NL80211_CMD_NEW_STATION, 0);
3322
3323         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3324                     if_nametoindex(drv->ifname));
3325         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3326         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3327         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3328                 params->supp_rates);
3329         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3330                     params->listen_interval);
3331
3332 #ifdef CONFIG_IEEE80211N
3333         if (params->ht_capabilities) {
3334                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3335                         params->ht_capabilities->length,
3336                         &params->ht_capabilities->data);
3337         }
3338 #endif /* CONFIG_IEEE80211N */
3339
3340         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3341         if (ret)
3342                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3343                            "result: %d (%s)", ret, strerror(-ret));
3344         if (ret == -EEXIST)
3345                 ret = 0;
3346  nla_put_failure:
3347         return ret;
3348 }
3349
3350
3351 static int i802_sta_remove(void *priv, const u8 *addr)
3352 {
3353         struct wpa_driver_nl80211_data *drv = priv;
3354         struct nl_msg *msg;
3355         int ret;
3356
3357         msg = nlmsg_alloc();
3358         if (!msg)
3359                 return -ENOMEM;
3360
3361         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3362                     0, NL80211_CMD_DEL_STATION, 0);
3363
3364         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3365                     if_nametoindex(drv->ifname));
3366         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3367
3368         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3369         if (ret == -ENOENT)
3370                 return 0;
3371         return ret;
3372  nla_put_failure:
3373         return -ENOBUFS;
3374 }
3375
3376
3377 static int i802_sta_set_flags(void *priv, const u8 *addr,
3378                               int total_flags, int flags_or, int flags_and)
3379 {
3380         struct wpa_driver_nl80211_data *drv = priv;
3381         struct nl_msg *msg, *flags = NULL;
3382
3383         msg = nlmsg_alloc();
3384         if (!msg)
3385                 return -ENOMEM;
3386
3387         flags = nlmsg_alloc();
3388         if (!flags) {
3389                 nlmsg_free(msg);
3390                 return -ENOMEM;
3391         }
3392
3393         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3394                     0, NL80211_CMD_SET_STATION, 0);
3395
3396         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3397                     if_nametoindex(drv->ifname));
3398         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3399
3400         if (total_flags & WLAN_STA_AUTHORIZED)
3401                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3402
3403         if (total_flags & WLAN_STA_WMM)
3404                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3405
3406         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3407                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3408
3409         if (total_flags & WLAN_STA_MFP)
3410                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3411
3412         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3413                 goto nla_put_failure;
3414
3415         nlmsg_free(flags);
3416
3417         return send_and_recv_msgs(drv, msg, NULL, NULL);
3418  nla_put_failure:
3419         nlmsg_free(flags);
3420         return -ENOBUFS;
3421 }
3422
3423
3424 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3425                                     int cw_min, int cw_max, int burst_time)
3426 {
3427         struct wpa_driver_nl80211_data *drv = priv;
3428         struct nl_msg *msg;
3429         struct nlattr *txq, *params;
3430
3431         msg = nlmsg_alloc();
3432         if (!msg)
3433                 return -1;
3434
3435         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3436                     0, NL80211_CMD_SET_WIPHY, 0);
3437
3438         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3439
3440         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3441         if (!txq)
3442                 goto nla_put_failure;
3443
3444         /* We are only sending parameters for a single TXQ at a time */
3445         params = nla_nest_start(msg, 1);
3446         if (!params)
3447                 goto nla_put_failure;
3448
3449         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3450         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3451          * 32 usec, so need to convert the value here. */
3452         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3453         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3454         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3455         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3456
3457         nla_nest_end(msg, params);
3458
3459         nla_nest_end(msg, txq);
3460
3461         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3462                 return 0;
3463  nla_put_failure:
3464         return -1;
3465 }
3466
3467
3468 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3469 {
3470         struct wpa_driver_nl80211_data *drv = priv;
3471         int ifidx;
3472         struct i802_bss *bss;
3473
3474         bss = os_zalloc(sizeof(*bss));
3475         if (bss == NULL)
3476                 return -1;
3477         bss->ifindex = if_nametoindex(ifname);
3478
3479         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3480         if (ifidx < 0) {
3481                 os_free(bss);
3482                 return -1;
3483         }
3484         if (hostapd_set_iface_flags(priv, ifname, 1)) {
3485                 nl80211_remove_iface(priv, ifidx);
3486                 os_free(bss);
3487                 return -1;
3488         }
3489         bss->next = drv->bss.next;
3490         drv->bss.next = bss;
3491         return 0;
3492 }
3493
3494
3495 static int i802_bss_remove(void *priv, const char *ifname)
3496 {
3497         struct wpa_driver_nl80211_data *drv = priv;
3498         struct i802_bss *bss, *prev;
3499         int ifindex = if_nametoindex(ifname);
3500         nl80211_remove_iface(priv, ifindex);
3501         prev = &drv->bss;
3502         bss = drv->bss.next;
3503         while (bss) {
3504                 if (ifindex == bss->ifindex) {
3505                         prev->next = bss->next;
3506                         os_free(bss);
3507                         break;
3508                 }
3509                 prev = bss;
3510                 bss = bss->next;
3511         }
3512         return 0;
3513 }
3514
3515
3516 static int i802_set_beacon(const char *iface, void *priv,
3517                            const u8 *head, size_t head_len,
3518                            const u8 *tail, size_t tail_len, int dtim_period)
3519 {
3520         return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3521                                                    head, head_len,
3522                                                    tail, tail_len,
3523                                                    dtim_period);
3524 }
3525
3526
3527 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3528 {
3529         struct nl_msg *msg;
3530
3531         msg = nlmsg_alloc();
3532         if (!msg)
3533                 return -ENOMEM;
3534
3535         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3536                     0, NL80211_CMD_DEL_BEACON, 0);
3537         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3538
3539         return send_and_recv_msgs(drv, msg, NULL, NULL);
3540  nla_put_failure:
3541         return -ENOBUFS;
3542 }
3543
3544
3545 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3546 {
3547         struct wpa_driver_nl80211_data *drv = priv;
3548         struct nl_msg *msg;
3549
3550         msg = nlmsg_alloc();
3551         if (!msg)
3552                 return -ENOMEM;
3553
3554         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3555                     NL80211_CMD_SET_BSS, 0);
3556
3557         if (cts >= 0)
3558                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3559         if (preamble >= 0)
3560                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3561         if (slot >= 0)
3562                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3563
3564         /* TODO: multi-BSS support */
3565         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3566
3567         return send_and_recv_msgs(drv, msg, NULL, NULL);
3568  nla_put_failure:
3569         return -ENOBUFS;
3570 }
3571
3572
3573 static int i802_set_cts_protect(void *priv, int value)
3574 {
3575         return i802_set_bss(priv, value, -1, -1);
3576 }
3577
3578
3579 static int i802_set_preamble(void *priv, int value)
3580 {
3581         return i802_set_bss(priv, -1, value, -1);
3582 }
3583
3584
3585 static int i802_set_short_slot_time(void *priv, int value)
3586 {
3587         return i802_set_bss(priv, -1, -1, value);
3588 }
3589
3590
3591 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3592 {
3593         switch (type) {
3594         case HOSTAPD_IF_VLAN:
3595                 return NL80211_IFTYPE_AP_VLAN;
3596         case HOSTAPD_IF_WDS:
3597                 return NL80211_IFTYPE_WDS;
3598         }
3599         return -1;
3600 }
3601
3602
3603 static int i802_if_add(const char *iface, void *priv,
3604                        enum hostapd_driver_if_type type, char *ifname,
3605                        const u8 *addr)
3606 {
3607         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3608                 return -1;
3609         return 0;
3610 }
3611
3612
3613 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3614                           char *ifname, const u8 *addr)
3615 {
3616         /* unused at the moment */
3617         return -1;
3618 }
3619
3620
3621 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3622                           const char *ifname, const u8 *addr)
3623 {
3624         nl80211_remove_iface(priv, if_nametoindex(ifname));
3625         return 0;
3626 }
3627
3628
3629 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3630                              const char *ifname, int vlan_id)
3631 {
3632         struct wpa_driver_nl80211_data *drv = priv;
3633         struct nl_msg *msg;
3634
3635         msg = nlmsg_alloc();
3636         if (!msg)
3637                 return -ENOMEM;
3638
3639         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3640                     0, NL80211_CMD_SET_STATION, 0);
3641
3642         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3643                     if_nametoindex(drv->ifname));
3644         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3645         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3646                     if_nametoindex(ifname));
3647
3648         return send_and_recv_msgs(drv, msg, NULL, NULL);
3649  nla_put_failure:
3650         return -ENOBUFS;
3651 }
3652
3653
3654 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3655                          u8 *buf, size_t len,
3656                          struct hostapd_frame_info *hfi,
3657                          enum ieee80211_msg_type msg_type)
3658 {
3659         struct hostapd_iface *iface = drv->hapd->iface;
3660         struct ieee80211_hdr *hdr;
3661         u16 fc, type, stype;
3662         size_t data_len = len;
3663         struct hostapd_data *hapd = NULL;
3664         int broadcast_bssid = 0;
3665         size_t i;
3666         u8 *bssid;
3667
3668         /*
3669          * PS-Poll frames are 16 bytes. All other frames are
3670          * 24 bytes or longer.
3671          */
3672         if (len < 16)
3673                 return;
3674
3675         hdr = (struct ieee80211_hdr *) buf;
3676         fc = le_to_host16(hdr->frame_control);
3677
3678         type = WLAN_FC_GET_TYPE(fc);
3679         stype = WLAN_FC_GET_STYPE(fc);
3680
3681         switch (type) {
3682         case WLAN_FC_TYPE_DATA:
3683                 if (len < 24)
3684                         return;
3685                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
3686                 case WLAN_FC_TODS:
3687                         bssid = hdr->addr1;
3688                         break;
3689                 case WLAN_FC_FROMDS:
3690                         bssid = hdr->addr2;
3691                         break;
3692                 default:
3693                         /* discard */
3694                         return;
3695                 }
3696                 break;
3697         case WLAN_FC_TYPE_CTRL:
3698                 /* discard non-ps-poll frames */
3699                 if (stype != WLAN_FC_STYPE_PSPOLL)
3700                         return;
3701                 bssid = hdr->addr1;
3702                 break;
3703         case WLAN_FC_TYPE_MGMT:
3704                 bssid = hdr->addr3;
3705                 break;
3706         default:
3707                 /* discard */
3708                 return;
3709         }
3710
3711         /* find interface frame belongs to */
3712         for (i = 0; i < iface->num_bss; i++) {
3713                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
3714                         hapd = iface->bss[i];
3715                         break;
3716                 }
3717         }
3718
3719         if (hapd == NULL) {
3720                 hapd = iface->bss[0];
3721
3722                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
3723                     bssid[2] != 0xff || bssid[3] != 0xff ||
3724                     bssid[4] != 0xff || bssid[5] != 0xff) {
3725                         /*
3726                          * Unknown BSSID - drop frame if this is not from
3727                          * passive scanning or a beacon (at least ProbeReq
3728                          * frames to other APs may be allowed through RX
3729                          * filtering in the wlan hw/driver)
3730                          */
3731                         if ((type != WLAN_FC_TYPE_MGMT ||
3732                              stype != WLAN_FC_STYPE_BEACON))
3733                                 return;
3734                 } else
3735                         broadcast_bssid = 1;
3736         }
3737
3738         switch (msg_type) {
3739         case ieee80211_msg_normal:
3740                 /* continue processing */
3741                 break;
3742         case ieee80211_msg_tx_callback_ack:
3743                 handle_tx_callback(hapd, buf, data_len, 1);
3744                 return;
3745         case ieee80211_msg_tx_callback_fail:
3746                 handle_tx_callback(hapd, buf, data_len, 0);
3747                 return;
3748         }
3749
3750         switch (type) {
3751         case WLAN_FC_TYPE_MGMT:
3752                 if (stype != WLAN_FC_STYPE_BEACON &&
3753                     stype != WLAN_FC_STYPE_PROBE_REQ)
3754                         wpa_printf(MSG_MSGDUMP, "MGMT");
3755                 if (broadcast_bssid) {
3756                         for (i = 0; i < iface->num_bss; i++)
3757                                 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
3758                                                 stype, hfi);
3759                 } else
3760                         hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
3761                 break;
3762         case WLAN_FC_TYPE_CTRL:
3763                 /* can only get here with PS-Poll frames */
3764                 wpa_printf(MSG_DEBUG, "CTRL");
3765                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3766                 break;
3767         case WLAN_FC_TYPE_DATA:
3768                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3769                 break;
3770         }
3771 }
3772
3773
3774 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3775 {
3776         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3777         struct sockaddr_ll lladdr;
3778         unsigned char buf[3000];
3779         int len;
3780         socklen_t fromlen = sizeof(lladdr);
3781
3782         len = recvfrom(sock, buf, sizeof(buf), 0,
3783                        (struct sockaddr *)&lladdr, &fromlen);
3784         if (len < 0) {
3785                 perror("recv");
3786                 return;
3787         }
3788
3789         if (have_ifidx(drv, lladdr.sll_ifindex)) {
3790                 struct hostapd_data *hapd;
3791                 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3792                 if (!hapd)
3793                         return;
3794                 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3795         }
3796 }
3797
3798
3799 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
3800                             int mode)
3801 {
3802         struct nl_msg *msg;
3803         int ret = -ENOBUFS;
3804
3805         msg = nlmsg_alloc();
3806         if (!msg)
3807                 return -ENOMEM;
3808
3809         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3810                     0, NL80211_CMD_SET_INTERFACE, 0);
3811         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3812                     if_nametoindex(ifname));
3813         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3814
3815         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3816         if (!ret)
3817                 return 0;
3818  nla_put_failure:
3819         wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
3820                    "mode.", ifname);
3821         return ret;
3822 }
3823
3824
3825 #ifdef CONFIG_IEEE80211N
3826 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
3827                               int freq, u8 *ie, size_t ie_len)
3828 {
3829         struct ieee802_11_elems elems;
3830         int ht, pri_chan = 0, sec_chan = 0;
3831         struct ieee80211_ht_operation *oper;
3832         struct hostapd_neighbor_bss *nnei;
3833
3834         ieee802_11_parse_elems(ie, ie_len, &elems, 0);
3835         ht = elems.ht_capabilities || elems.ht_operation;
3836         if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
3837                 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
3838                 pri_chan = oper->control_chan;
3839                 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
3840                         if (oper->ht_param &
3841                             HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
3842                                 sec_chan = pri_chan + 4;
3843                         else if (oper->ht_param &
3844                             HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
3845                                 sec_chan = pri_chan - 4;
3846                 }
3847         }
3848
3849         wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
3850                    " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
3851                    MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
3852
3853         nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
3854                           sizeof(struct hostapd_neighbor_bss));
3855         if (nnei == NULL)
3856                 return;
3857         drv->neighbors = nnei;
3858         nnei = &nnei[drv->num_neighbors];
3859         os_memcpy(nnei->bssid, bssid, ETH_ALEN);
3860         nnei->freq = freq;
3861         nnei->ht = !!ht;
3862         nnei->pri_chan = pri_chan;
3863         nnei->sec_chan = sec_chan;
3864         drv->num_neighbors++;
3865 }
3866
3867
3868 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
3869 {
3870         int divi = 1000000, i;
3871
3872         if (iwe->u.freq.e == 0) {
3873                 /*
3874                  * Some drivers do not report frequency, but a channel.
3875                  * Try to map this to frequency by assuming they are using
3876                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
3877                  * frequency if the driver sends both frequency and channel,
3878                  * since the driver may be sending an A-band channel that we
3879                  * don't handle here.
3880                  */
3881
3882                 if (*freq)
3883                         return 0;
3884
3885                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
3886                         *freq = 2407 + 5 * iwe->u.freq.m;
3887                         return 0;
3888                 } else if (iwe->u.freq.m == 14) {
3889                         *freq = 2484;
3890                         return 0;
3891                 }
3892         }
3893
3894         if (iwe->u.freq.e > 6) {
3895                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
3896                            "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
3897                 return -1;
3898         }
3899
3900         for (i = 0; i < iwe->u.freq.e; i++)
3901                 divi /= 10;
3902         *freq = iwe->u.freq.m / divi;
3903         return 0;
3904 }
3905
3906
3907 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
3908                            size_t len)
3909 {
3910         size_t ap_num = 0;
3911         int first;
3912         struct iw_event iwe_buf, *iwe = &iwe_buf;
3913         char *pos, *end, *custom;
3914         u8 bssid[ETH_ALEN];
3915         int freq = 0;
3916         u8 *ie = NULL;
3917         size_t ie_len = 0;
3918
3919         ap_num = 0;
3920         first = 1;
3921
3922         pos = (char *) res_buf;
3923         end = (char *) res_buf + len;
3924
3925         while (pos + IW_EV_LCP_LEN <= end) {
3926                 /* Event data may be unaligned, so make a local, aligned copy
3927                  * before processing. */
3928                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
3929                 if (iwe->len <= IW_EV_LCP_LEN)
3930                         break;
3931
3932                 custom = pos + IW_EV_POINT_LEN;
3933                 if (iwe->cmd == IWEVGENIE) {
3934                         /* WE-19 removed the pointer from struct iw_point */
3935                         char *dpos = (char *) &iwe_buf.u.data.length;
3936                         int dlen = dpos - (char *) &iwe_buf;
3937                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
3938                                   sizeof(struct iw_event) - dlen);
3939                 } else {
3940                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
3941                         custom += IW_EV_POINT_OFF;
3942                 }
3943
3944                 switch (iwe->cmd) {
3945                 case SIOCGIWAP:
3946                         if (!first)
3947                                 i802_add_neighbor(drv, bssid, freq, ie,
3948                                                   ie_len);
3949                         first = 0;
3950                         os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
3951                         freq = 0;
3952                         ie = NULL;
3953                         ie_len = 0;
3954                         break;
3955                 case SIOCGIWFREQ:
3956                         i802_get_scan_freq(iwe, &freq);
3957                         break;
3958                 case IWEVGENIE:
3959                         if (custom + iwe->u.data.length > end) {
3960                                 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
3961                                 return -1;
3962                         }
3963                         ie = (u8 *) custom;
3964                         ie_len = iwe->u.data.length;
3965                         break;
3966                 }
3967
3968                 pos += iwe->len;
3969         }
3970
3971         if (!first)
3972                 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
3973
3974         return 0;
3975 }
3976
3977
3978 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
3979 {
3980         struct iwreq iwr;
3981         u8 *res_buf;
3982         size_t res_buf_len;
3983         int res;
3984
3985         res_buf_len = IW_SCAN_MAX_DATA;
3986         for (;;) {
3987                 res_buf = os_malloc(res_buf_len);
3988                 if (res_buf == NULL)
3989                         return -1;
3990                 os_memset(&iwr, 0, sizeof(iwr));
3991                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3992                 iwr.u.data.pointer = res_buf;
3993                 iwr.u.data.length = res_buf_len;
3994
3995                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
3996                         break;
3997
3998                 if (errno == E2BIG && res_buf_len < 65535) {
3999                         os_free(res_buf);
4000                         res_buf = NULL;
4001                         res_buf_len *= 2;
4002                         if (res_buf_len > 65535)
4003                                 res_buf_len = 65535; /* 16-bit length field */
4004                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
4005                                    "trying larger buffer (%lu bytes)",
4006                                    (unsigned long) res_buf_len);
4007                 } else {
4008                         perror("ioctl[SIOCGIWSCAN]");
4009                         os_free(res_buf);
4010                         return -1;
4011                 }
4012         }
4013
4014         if (iwr.u.data.length > res_buf_len) {
4015                 os_free(res_buf);
4016                 return -1;
4017         }
4018
4019         res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
4020         os_free(res_buf);
4021
4022         return res;
4023 }
4024
4025
4026 static int i802_is_event_wireless_scan_complete(char *data, int len)
4027 {
4028         struct iw_event iwe_buf, *iwe = &iwe_buf;
4029         char *pos, *end;
4030
4031         pos = data;
4032         end = data + len;
4033
4034         while (pos + IW_EV_LCP_LEN <= end) {
4035                 /* Event data may be unaligned, so make a local, aligned copy
4036                  * before processing. */
4037                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4038                 if (iwe->cmd == SIOCGIWSCAN)
4039                         return 1;
4040
4041                 pos += iwe->len;
4042         }
4043
4044         return 0;
4045 }
4046
4047
4048 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4049 {
4050         struct ifinfomsg *ifi;
4051         int attrlen, _nlmsg_len, rta_len;
4052         struct rtattr *attr;
4053
4054         if (len < (int) sizeof(*ifi))
4055                 return 0;
4056
4057         ifi = NLMSG_DATA(h);
4058
4059         if (ifindex != ifi->ifi_index)
4060                 return 0; /* event for foreign ifindex */
4061
4062         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4063
4064         attrlen = h->nlmsg_len - _nlmsg_len;
4065         if (attrlen < 0)
4066                 return 0;
4067
4068         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4069
4070         rta_len = RTA_ALIGN(sizeof(struct rtattr));
4071         while (RTA_OK(attr, attrlen)) {
4072                 if (attr->rta_type == IFLA_WIRELESS &&
4073                     i802_is_event_wireless_scan_complete(
4074                             ((char *) attr) + rta_len,
4075                             attr->rta_len - rta_len))
4076                         return 1;
4077                 attr = RTA_NEXT(attr, attrlen);
4078         }
4079
4080         return 0;
4081 }
4082
4083
4084 static int i802_is_scan_complete(int s, int ifindex)
4085 {
4086         char buf[1024];
4087         int left;
4088         struct nlmsghdr *h;
4089
4090         left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4091         if (left < 0) {
4092                 perror("recv(netlink)");
4093                 return 0;
4094         }
4095
4096         h = (struct nlmsghdr *) buf;
4097         while (left >= (int) sizeof(*h)) {
4098                 int len, plen;
4099
4100                 len = h->nlmsg_len;
4101                 plen = len - sizeof(*h);
4102                 if (len > left || plen < 0) {
4103                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4104                                    "len=%d left=%d plen=%d",
4105                                    len, left, plen);
4106                         break;
4107                 }
4108
4109                 switch (h->nlmsg_type) {
4110                 case RTM_NEWLINK:
4111                         if (i802_is_rtm_scan_complete(ifindex, h, plen))
4112                                 return 1;
4113                         break;
4114                 }
4115
4116                 len = NLMSG_ALIGN(len);
4117                 left -= len;
4118                 h = (struct nlmsghdr *) ((char *) h + len);
4119         }
4120
4121         return 0;
4122 }
4123
4124
4125 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4126 {
4127         struct iwreq iwr;
4128         int s, res, ifindex;
4129         struct sockaddr_nl local;
4130         time_t now, end;
4131         fd_set rfds;
4132         struct timeval tv;
4133
4134         wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4135                    "starting HT 20/40 MHz BSS");
4136
4137         /* Request a new scan */
4138         /* TODO: would be enough to scan the selected band */
4139         os_memset(&iwr, 0, sizeof(iwr));
4140         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4141         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4142                 perror("ioctl[SIOCSIWSCAN]");
4143                 return -1;
4144         }
4145
4146         ifindex = if_nametoindex(drv->ifname);
4147
4148         /* Wait for scan completion event or timeout */
4149         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4150         if (s < 0) {
4151                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4152                 return -1;
4153         }
4154
4155         os_memset(&local, 0, sizeof(local));
4156         local.nl_family = AF_NETLINK;
4157         local.nl_groups = RTMGRP_LINK;
4158         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
4159                 perror("bind(netlink)");
4160                 close(s);
4161                 return -1;
4162         }
4163
4164         time(&end);
4165         end += 30; /* Wait at most 30 seconds for scan results */
4166         for (;;) {
4167                 time(&now);
4168                 tv.tv_sec = end > now ? end - now : 0;
4169                 tv.tv_usec = 0;
4170                 FD_ZERO(&rfds);
4171                 FD_SET(s, &rfds);
4172                 res = select(s + 1, &rfds, NULL, NULL, &tv);
4173                 if (res < 0) {
4174                         perror("select");
4175                         /* Assume results are ready after 10 seconds wait */
4176                         os_sleep(10, 0);
4177                         break;
4178                 } else if (res) {
4179                         if (i802_is_scan_complete(s, ifindex)) {
4180                                 wpa_printf(MSG_DEBUG, "nl80211: Scan "
4181                                            "completed");
4182                                 break;
4183                         }
4184                 } else {
4185                         wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
4186                         /* Assume results are ready to be read now */
4187                         break;
4188                 }
4189         }
4190
4191         close(s);
4192
4193         return i802_get_ht_scan_res(drv);
4194 }
4195 #endif /* CONFIG_IEEE80211N */
4196
4197
4198 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
4199 {
4200         struct ifreq ifr;
4201         int ret;
4202
4203         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
4204         if (drv->ioctl_sock < 0) {
4205                 perror("socket[PF_INET,SOCK_DGRAM]");
4206                 return -1;
4207         }
4208
4209         /* start listening for EAPOL on the default AP interface */
4210         add_ifidx(drv, if_nametoindex(drv->ifname));
4211
4212         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4213                 return -1;
4214
4215         if (bssid) {
4216                 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
4217                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
4218                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
4219
4220                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
4221                         perror("ioctl(SIOCSIFHWADDR)");
4222                         return -1;
4223                 }
4224         }
4225
4226         /*
4227          * initialise generic netlink and nl80211
4228          */
4229         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
4230         if (!drv->nl_cb) {
4231                 printf("Failed to allocate netlink callbacks.\n");
4232                 return -1;
4233         }
4234
4235         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
4236         if (!drv->nl_handle) {
4237                 printf("Failed to allocate netlink handle.\n");
4238                 return -1;
4239         }
4240
4241         if (genl_connect(drv->nl_handle)) {
4242                 printf("Failed to connect to generic netlink.\n");
4243                 return -1;
4244         }
4245
4246 #ifdef CONFIG_LIBNL20
4247         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
4248                 printf("Failed to allocate generic netlink cache.\n");
4249                 return -1;
4250         }
4251 #else /* CONFIG_LIBNL20 */
4252         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
4253         if (!drv->nl_cache) {
4254                 printf("Failed to allocate generic netlink cache.\n");
4255                 return -1;
4256         }
4257 #endif /* CONFIG_LIBNL20 */
4258
4259         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
4260         if (!drv->nl80211) {
4261                 printf("nl80211 not found.\n");
4262                 return -1;
4263         }
4264
4265         ret = nl_get_multicast_id(drv, "nl80211", "scan");
4266         if (ret >= 0)
4267                 ret = nl_socket_add_membership(drv->nl_handle, ret);
4268         if (ret < 0) {
4269                 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4270                            "membership for scan events: %d (%s)",
4271                            ret, strerror(-ret));
4272         }
4273
4274         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
4275         if (ret >= 0)
4276                 ret = nl_socket_add_membership(drv->nl_handle, ret);
4277         if (ret < 0) {
4278                 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4279                            "membership for mlme events: %d (%s)",
4280                            ret, strerror(-ret));
4281         }
4282
4283         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
4284                                  wpa_driver_nl80211_event_receive, drv,
4285                                  drv->hapd);
4286
4287 #ifdef CONFIG_IEEE80211N
4288         if (drv->ht_40mhz_scan) {
4289                 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
4290                     || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
4291                     i802_ht_scan(drv) ||
4292                     hostapd_set_iface_flags(drv, drv->ifname, 0)) {
4293                         wpa_printf(MSG_ERROR, "Failed to scan channels for "
4294                                    "HT 40 MHz operations");
4295                         return -1;
4296                 }
4297         }
4298 #endif /* CONFIG_IEEE80211N */
4299
4300         /* Initialise a monitor interface */
4301         if (nl80211_create_monitor_interface(drv))
4302                 return -1;
4303
4304         if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
4305                 goto fail1;
4306
4307         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4308                 goto fail1;
4309
4310         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4311         if (drv->eapol_sock < 0) {
4312                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4313                 goto fail1;
4314         }
4315
4316         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4317         {
4318                 printf("Could not register read socket for eapol\n");
4319                 return -1;
4320         }
4321
4322         memset(&ifr, 0, sizeof(ifr));
4323         os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
4324         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
4325                 perror("ioctl(SIOCGIFHWADDR)");
4326                 goto fail1;
4327         }
4328
4329         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
4330                 printf("Invalid HW-addr family 0x%04x\n",
4331                        ifr.ifr_hwaddr.sa_family);
4332                 goto fail1;
4333         }
4334         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
4335
4336         return 0;
4337
4338 fail1:
4339         nl80211_remove_iface(drv, drv->monitor_ifidx);
4340         return -1;
4341 }
4342
4343
4344 static int i802_get_inact_sec(void *priv, const u8 *addr)
4345 {
4346         struct hostap_sta_driver_data data;
4347         int ret;
4348
4349         data.inactive_msec = (unsigned long) -1;
4350         ret = i802_read_sta_data(priv, &data, addr);
4351         if (ret || data.inactive_msec == (unsigned long) -1)
4352                 return -1;
4353         return data.inactive_msec / 1000;
4354 }
4355
4356
4357 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4358 {
4359 #if 0
4360         /* TODO */
4361 #endif
4362         return 0;
4363 }
4364
4365
4366 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
4367 {
4368         struct wpa_driver_nl80211_data *drv = priv;
4369         struct ieee80211_mgmt mgmt;
4370
4371         memset(&mgmt, 0, sizeof(mgmt));
4372         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4373                                           WLAN_FC_STYPE_DEAUTH);
4374         memcpy(mgmt.da, addr, ETH_ALEN);
4375         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4376         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4377         mgmt.u.deauth.reason_code = host_to_le16(reason);
4378         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4379                                             IEEE80211_HDRLEN +
4380                                             sizeof(mgmt.u.deauth));
4381 }
4382
4383
4384 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
4385 {
4386         struct wpa_driver_nl80211_data *drv = priv;
4387         struct ieee80211_mgmt mgmt;
4388
4389         memset(&mgmt, 0, sizeof(mgmt));
4390         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4391                                           WLAN_FC_STYPE_DISASSOC);
4392         memcpy(mgmt.da, addr, ETH_ALEN);
4393         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4394         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4395         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4396         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4397                                             IEEE80211_HDRLEN +
4398                                             sizeof(mgmt.u.disassoc));
4399 }
4400
4401
4402 static const struct hostapd_neighbor_bss *
4403 i802_get_neighbor_bss(void *priv, size_t *num)
4404 {
4405         struct wpa_driver_nl80211_data *drv = priv;
4406         *num = drv->num_neighbors;
4407         return drv->neighbors;
4408 }
4409
4410
4411 static void *i802_init(struct hostapd_data *hapd,
4412                        struct wpa_init_params *params)
4413 {
4414         struct wpa_driver_nl80211_data *drv;
4415         size_t i;
4416
4417         drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
4418         if (drv == NULL) {
4419                 printf("Could not allocate memory for i802 driver data\n");
4420                 return NULL;
4421         }
4422
4423         drv->hapd = hapd;
4424         memcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
4425         drv->ifindex = if_nametoindex(drv->ifname);
4426         drv->bss.ifindex = drv->ifindex;
4427
4428         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4429         drv->if_indices = drv->default_if_indices;
4430         for (i = 0; i < params->num_bridge; i++) {
4431                 if (params->bridge[i])
4432                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4433         }
4434         drv->ht_40mhz_scan = params->ht_40mhz_scan;
4435
4436         if (i802_init_sockets(drv, params->bssid))
4437                 goto failed;
4438
4439         return drv;
4440
4441 failed:
4442         free(drv);
4443         return NULL;
4444 }
4445
4446
4447 static void i802_deinit(void *priv)
4448 {
4449         struct wpa_driver_nl80211_data *drv = priv;
4450         struct i802_bss *bss, *prev;
4451
4452         if (drv->last_freq_ht) {
4453                 /* Clear HT flags from the driver */
4454                 struct hostapd_freq_params freq;
4455                 os_memset(&freq, 0, sizeof(freq));
4456                 freq.freq = drv->last_freq;
4457                 i802_set_freq(priv, &freq);
4458         }
4459
4460         i802_del_beacon(drv);
4461
4462         /* remove monitor interface */
4463         nl80211_remove_iface(drv, drv->monitor_ifidx);
4464
4465         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
4466
4467         if (drv->monitor_sock >= 0) {
4468                 eloop_unregister_read_sock(drv->monitor_sock);
4469                 close(drv->monitor_sock);
4470         }
4471         if (drv->ioctl_sock >= 0)
4472                 close(drv->ioctl_sock);
4473         if (drv->eapol_sock >= 0) {
4474                 eloop_unregister_read_sock(drv->eapol_sock);
4475                 close(drv->eapol_sock);
4476         }
4477
4478         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
4479         genl_family_put(drv->nl80211);
4480         nl_cache_free(drv->nl_cache);
4481         nl_handle_destroy(drv->nl_handle);
4482         nl_cb_put(drv->nl_cb);
4483
4484         if (drv->if_indices != drv->default_if_indices)
4485                 free(drv->if_indices);
4486
4487         os_free(drv->neighbors);
4488
4489         bss = drv->bss.next;
4490         while (bss) {
4491                 prev = bss;
4492                 bss = bss->next;
4493                 os_free(bss);
4494         }
4495
4496         free(drv);
4497 }
4498
4499 #endif /* HOSTAPD */
4500
4501
4502 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4503         .name = "nl80211",
4504         .desc = "Linux nl80211/cfg80211",
4505         .get_bssid = wpa_driver_nl80211_get_bssid,
4506         .get_ssid = wpa_driver_nl80211_get_ssid,
4507         .set_key = wpa_driver_nl80211_set_key,
4508         .scan2 = wpa_driver_nl80211_scan,
4509         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4510         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4511         .disassociate = wpa_driver_nl80211_disassociate,
4512         .authenticate = wpa_driver_nl80211_authenticate,
4513         .associate = wpa_driver_nl80211_associate,
4514         .init = wpa_driver_nl80211_init,
4515         .deinit = wpa_driver_nl80211_deinit,
4516         .get_capa = wpa_driver_nl80211_get_capa,
4517         .set_operstate = wpa_driver_nl80211_set_operstate,
4518         .set_country = wpa_driver_nl80211_set_country,
4519 #ifdef CONFIG_AP
4520         .set_beacon = wpa_driver_nl80211_set_beacon,
4521 #endif /* CONFIG_AP */
4522 #if defined(CONFIG_AP) || defined(HOSTAPD)
4523         .send_mlme = wpa_driver_nl80211_send_mlme,
4524         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4525         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4526 #endif /* CONFIG_AP || HOSTAPD */
4527 #ifdef HOSTAPD
4528         .hapd_init = i802_init,
4529         .hapd_deinit = i802_deinit,
4530         .hapd_set_key = i802_set_key,
4531         .get_seqnum = i802_get_seqnum,
4532         .flush = i802_flush,
4533         .read_sta_data = i802_read_sta_data,
4534         .hapd_send_eapol = i802_send_eapol,
4535         .sta_set_flags = i802_sta_set_flags,
4536         .sta_deauth = i802_sta_deauth,
4537         .sta_disassoc = i802_sta_disassoc,
4538         .sta_remove = i802_sta_remove,
4539         .sta_add = i802_sta_add,
4540         .get_inact_sec = i802_get_inact_sec,
4541         .sta_clear_stats = i802_sta_clear_stats,
4542         .set_freq = i802_set_freq,
4543         .set_rts = i802_set_rts,
4544         .set_frag = i802_set_frag,
4545         .set_retry = i802_set_retry,
4546         .set_rate_sets = i802_set_rate_sets,
4547         .hapd_set_beacon = i802_set_beacon,
4548         .set_cts_protect = i802_set_cts_protect,
4549         .set_preamble = i802_set_preamble,
4550         .set_short_slot_time = i802_set_short_slot_time,
4551         .set_tx_queue_params = i802_set_tx_queue_params,
4552         .bss_add = i802_bss_add,
4553         .bss_remove = i802_bss_remove,
4554         .if_add = i802_if_add,
4555         .if_update = i802_if_update,
4556         .if_remove = i802_if_remove,
4557         .set_sta_vlan = i802_set_sta_vlan,
4558         .get_neighbor_bss = i802_get_neighbor_bss,
4559 #endif /* HOSTAPD */
4560 };