git.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 <netlink/msg.h>
  52 #include <netlink/attr.h>
  53 #include <net/if.h>
  54 #include <net/if_arp.h>
  55
  56 #include "../../hostapd/hostapd.h"
  57 #include "../../hostapd/config.h"
  58 #include "../../hostapd/hw_features.h"
  59 #include "../../hostapd/mlme.h"
  60 #include "../../hostapd/sta_flags.h"
  61 #include "ieee802_11_common.h"
  62
  63 #ifdef CONFIG_LIBNL20
  64 /* libnl 2.0 compatibility code */
  65 #define nl_handle_alloc_cb nl_socket_alloc_cb
  66 #define nl_handle_destroy nl_socket_free
  67 #endif /* CONFIG_LIBNL20 */
  68
  69 #endif /* HOSTAPD */
  70
  71
  72 #ifndef IFF_LOWER_UP
  73 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  74 #endif
  75 #ifndef IFF_DORMANT
  76 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  77 #endif
  78
  79 #ifndef IF_OPER_DORMANT
  80 #define IF_OPER_DORMANT 5
  81 #endif
  82 #ifndef IF_OPER_UP
  83 #define IF_OPER_UP 6
  84 #endif
  85
  86 enum ieee80211_msg_type {
  87         ieee80211_msg_normal = 0,
  88         ieee80211_msg_tx_callback_ack = 1,
  89         ieee80211_msg_tx_callback_fail = 2,
  90 };
  91
  92 struct i802_bss {
  93         struct i802_bss *next;
  94         char ifname[IFNAMSIZ + 1];
  95         unsigned int beacon_set:1;
  96 };
  97
  98 struct wpa_driver_nl80211_data {
  99         void *ctx;
 100         int link_event_sock;
 101         int ioctl_sock; /* socket for ioctl() use */
 102         char ifname[IFNAMSIZ + 1];
 103         int ifindex;
 104         int if_removed;
 105         struct wpa_driver_capa capa;
 106         int has_capability;
 107
 108         int operstate;
 109
 110         int scan_complete_events;
 111
 112         struct nl_handle *nl_handle;
 113         struct nl_cache *nl_cache;
 114         struct nl_cb *nl_cb;
 115         struct genl_family *nl80211;
 116
 117         u8 bssid[ETH_ALEN];
 118         int associated;
 119         u8 ssid[32];
 120         size_t ssid_len;
 121
 122 #ifdef CONFIG_AP
 123         int beacon_int;
 124         unsigned int beacon_set:1;
 125         int monitor_sock;
 126         int monitor_ifidx;
 127 #endif /* CONFIG_AP */
 128
 129 #ifdef HOSTAPD
 130         struct hostapd_data *hapd;
 131
 132         int eapol_sock; /* socket for EAPOL frames */
 133         int monitor_sock; /* socket for monitor */
 134         int monitor_ifidx;
 135
 136         int default_if_indices[16];
 137         int *if_indices;
 138         int num_if_indices;
 139
 140         int beacon_int;
 141         struct i802_bss bss;
 142         unsigned int ht_40mhz_scan:1;
 143
 144         int last_freq;
 145         int last_freq_ht;
 146         struct hostapd_neighbor_bss *neighbors;
 147         size_t num_neighbors;
 148 #endif /* HOSTAPD */
 149 };
 150
 151
 152 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 153                                             void *timeout_ctx);
 154 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
 155                                        int mode);
 156 static int
 157 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 158
 159 #ifdef CONFIG_AP
 160 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 161                                  int ifidx);
 162 #endif /* CONFIG_AP */
 163
 164 #ifdef HOSTAPD
 165 static void handle_frame(struct wpa_driver_nl80211_data *drv,
 166                          u8 *buf, size_t len,
 167                          struct hostapd_frame_info *hfi,
 168                          enum ieee80211_msg_type msg_type);
 169 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 170 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 171 #endif /* HOSTAPD */
 172
 173
 174 /* nl80211 code */
 175 static int ack_handler(struct nl_msg *msg, void *arg)
 176 {
 177         int *err = arg;
 178         *err = 0;
 179         return NL_STOP;
 180 }
 181
 182 static int finish_handler(struct nl_msg *msg, void *arg)
 183 {
 184         int *ret = arg;
 185         *ret = 0;
 186         return NL_SKIP;
 187 }
 188
 189 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 190                          void *arg)
 191 {
 192         int *ret = arg;
 193         *ret = err->error;
 194         return NL_SKIP;
 195 }
 196
 197
 198 static int no_seq_check(struct nl_msg *msg, void *arg)
 199 {
 200         return NL_OK;
 201 }
 202
 203
 204 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 205                               struct nl_msg *msg,
 206                               int (*valid_handler)(struct nl_msg *, void *),
 207                               void *valid_data)
 208 {
 209         struct nl_cb *cb;
 210         int err = -ENOMEM;
 211
 212         cb = nl_cb_clone(drv->nl_cb);
 213         if (!cb)
 214                 goto out;
 215
 216         err = nl_send_auto_complete(drv->nl_handle, msg);
 217         if (err < 0)
 218                 goto out;
 219
 220         err = 1;
 221
 222         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 223         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 224         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 225
 226         if (valid_handler)
 227                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 228                           valid_handler, valid_data);
 229
 230         while (err > 0)
 231                 nl_recvmsgs(drv->nl_handle, cb);
 232  out:
 233         nl_cb_put(cb);
 234         nlmsg_free(msg);
 235         return err;
 236 }
 237
 238
 239 struct family_data {
 240         const char *group;
 241         int id;
 242 };
 243
 244
 245 static int family_handler(struct nl_msg *msg, void *arg)
 246 {
 247         struct family_data *res = arg;
 248         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 249         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 250         struct nlattr *mcgrp;
 251         int i;
 252
 253         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 254                   genlmsg_attrlen(gnlh, 0), NULL);
 255         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 256                 return NL_SKIP;
 257
 258         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 259                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 260                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 261                           nla_len(mcgrp), NULL);
 262                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 263                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 264                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 265                                res->group,
 266                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 267                         continue;
 268                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 269                 break;
 270         };
 271
 272         return NL_SKIP;
 273 }
 274
 275
 276 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 277                                const char *family, const char *group)
 278 {
 279         struct nl_msg *msg;
 280         int ret = -1;
 281         struct family_data res = { group, -ENOENT };
 282
 283         msg = nlmsg_alloc();
 284         if (!msg)
 285                 return -ENOMEM;
 286         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 287                     0, 0, CTRL_CMD_GETFAMILY, 0);
 288         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 289
 290         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 291         msg = NULL;
 292         if (ret == 0)
 293                 ret = res.id;
 294
 295 nla_put_failure:
 296         nlmsg_free(msg);
 297         return ret;
 298 }
 299
 300
 301 static int wpa_driver_nl80211_send_oper_ifla(
 302         struct wpa_driver_nl80211_data *drv,
 303         int linkmode, int operstate)
 304 {
 305         struct {
 306                 struct nlmsghdr hdr;
 307                 struct ifinfomsg ifinfo;
 308                 char opts[16];
 309         } req;
 310         struct rtattr *rta;
 311         static int nl_seq;
 312         ssize_t ret;
 313
 314         os_memset(&req, 0, sizeof(req));
 315
 316         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 317         req.hdr.nlmsg_type = RTM_SETLINK;
 318         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 319         req.hdr.nlmsg_seq = ++nl_seq;
 320         req.hdr.nlmsg_pid = 0;
 321
 322         req.ifinfo.ifi_family = AF_UNSPEC;
 323         req.ifinfo.ifi_type = 0;
 324         req.ifinfo.ifi_index = drv->ifindex;
 325         req.ifinfo.ifi_flags = 0;
 326         req.ifinfo.ifi_change = 0;
 327
 328         if (linkmode != -1) {
 329                 rta = (struct rtattr *)
 330                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 331                 rta->rta_type = IFLA_LINKMODE;
 332                 rta->rta_len = RTA_LENGTH(sizeof(char));
 333                 *((char *) RTA_DATA(rta)) = linkmode;
 334                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 335                         RTA_LENGTH(sizeof(char));
 336         }
 337         if (operstate != -1) {
 338                 rta = (struct rtattr *)
 339                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 340                 rta->rta_type = IFLA_OPERSTATE;
 341                 rta->rta_len = RTA_LENGTH(sizeof(char));
 342                 *((char *) RTA_DATA(rta)) = operstate;
 343                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 344                         RTA_LENGTH(sizeof(char));
 345         }
 346
 347         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 348                    linkmode, operstate);
 349
 350         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 351         if (ret < 0) {
 352                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 353                            "%s (assume operstate is not supported)",
 354                            strerror(errno));
 355         }
 356
 357         return ret < 0 ? -1 : 0;
 358 }
 359
 360
 361 static int wpa_driver_nl80211_set_auth_param(
 362         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 363 {
 364         struct iwreq iwr;
 365         int ret = 0;
 366
 367         os_memset(&iwr, 0, sizeof(iwr));
 368         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 369         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 370         iwr.u.param.value = value;
 371
 372         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 373                 if (errno != EOPNOTSUPP) {
 374                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 375                                    "value 0x%x) failed: %s)",
 376                                    idx, value, strerror(errno));
 377                 }
 378                 ret = errno == EOPNOTSUPP ? -2 : -1;
 379         }
 380
 381         return ret;
 382 }
 383
 384
 385 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 386 {
 387         struct wpa_driver_nl80211_data *drv = priv;
 388         if (!drv->associated)
 389                 return -1;
 390         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 391         return 0;
 392 }
 393
 394
 395 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 396 {
 397         struct wpa_driver_nl80211_data *drv = priv;
 398         if (!drv->associated)
 399                 return -1;
 400         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 401         return drv->ssid_len;
 402 }
 403
 404
 405 #ifndef HOSTAPD
 406 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 407                                           void *ctx, char *buf, size_t len,
 408                                           int del)
 409 {
 410         union wpa_event_data event;
 411
 412         os_memset(&event, 0, sizeof(event));
 413         if (len > sizeof(event.interface_status.ifname))
 414                 len = sizeof(event.interface_status.ifname) - 1;
 415         os_memcpy(event.interface_status.ifname, buf, len);
 416         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 417                 EVENT_INTERFACE_ADDED;
 418
 419         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 420                    del ? "DEL" : "NEW",
 421                    event.interface_status.ifname,
 422                    del ? "removed" : "added");
 423
 424         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 425                 if (del)
 426                         drv->if_removed = 1;
 427                 else
 428                         drv->if_removed = 0;
 429         }
 430
 431         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 432 }
 433
 434
 435 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 436                                          struct nlmsghdr *h)
 437 {
 438         struct ifinfomsg *ifi;
 439         int attrlen, _nlmsg_len, rta_len;
 440         struct rtattr *attr;
 441
 442         ifi = NLMSG_DATA(h);
 443
 444         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 445
 446         attrlen = h->nlmsg_len - _nlmsg_len;
 447         if (attrlen < 0)
 448                 return 0;
 449
 450         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 451
 452         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 453         while (RTA_OK(attr, attrlen)) {
 454                 if (attr->rta_type == IFLA_IFNAME) {
 455                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 456                             == 0)
 457                                 return 1;
 458                         else
 459                                 break;
 460                 }
 461                 attr = RTA_NEXT(attr, attrlen);
 462         }
 463
 464         return 0;
 465 }
 466
 467
 468 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 469                                           int ifindex, struct nlmsghdr *h)
 470 {
 471         if (drv->ifindex == ifindex)
 472                 return 1;
 473
 474         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 475                 drv->ifindex = if_nametoindex(drv->ifname);
 476                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 477                            "interface");
 478                 wpa_driver_nl80211_finish_drv_init(drv);
 479                 return 1;
 480         }
 481
 482         return 0;
 483 }
 484
 485
 486 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 487                                               void *ctx, struct nlmsghdr *h,
 488                                               size_t len)
 489 {
 490         struct ifinfomsg *ifi;
 491         int attrlen, _nlmsg_len, rta_len;
 492         struct rtattr * attr;
 493
 494         if (len < sizeof(*ifi))
 495                 return;
 496
 497         ifi = NLMSG_DATA(h);
 498
 499         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 500                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 501                            ifi->ifi_index);
 502                 return;
 503         }
 504
 505         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 506                    "(%s%s%s%s)",
 507                    drv->operstate, ifi->ifi_flags,
 508                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 509                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 510                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 511                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 512         /*
 513          * Some drivers send the association event before the operup event--in
 514          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 515          * fails. This will hit us when wpa_supplicant does not need to do
 516          * IEEE 802.1X authentication
 517          */
 518         if (drv->operstate == 1 &&
 519             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 520             !(ifi->ifi_flags & IFF_RUNNING))
 521                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 522
 523         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 524
 525         attrlen = h->nlmsg_len - _nlmsg_len;
 526         if (attrlen < 0)
 527                 return;
 528
 529         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 530
 531         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 532         while (RTA_OK(attr, attrlen)) {
 533                 if (attr->rta_type == IFLA_IFNAME) {
 534                         wpa_driver_nl80211_event_link(
 535                                 drv, ctx,
 536                                 ((char *) attr) + rta_len,
 537                                 attr->rta_len - rta_len, 0);
 538                 }
 539                 attr = RTA_NEXT(attr, attrlen);
 540         }
 541 }
 542
 543
 544 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 545                                               void *ctx, struct nlmsghdr *h,
 546                                               size_t len)
 547 {
 548         struct ifinfomsg *ifi;
 549         int attrlen, _nlmsg_len, rta_len;
 550         struct rtattr * attr;
 551
 552         if (len < sizeof(*ifi))
 553                 return;
 554
 555         ifi = NLMSG_DATA(h);
 556
 557         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 558
 559         attrlen = h->nlmsg_len - _nlmsg_len;
 560         if (attrlen < 0)
 561                 return;
 562
 563         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 564
 565         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 566         while (RTA_OK(attr, attrlen)) {
 567                 if (attr->rta_type == IFLA_IFNAME) {
 568                         wpa_driver_nl80211_event_link(
 569                                 drv, ctx,
 570                                 ((char *) attr) + rta_len,
 571                                 attr->rta_len - rta_len, 1);
 572                 }
 573                 attr = RTA_NEXT(attr, attrlen);
 574         }
 575 }
 576
 577
 578 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 579                                                   void *sock_ctx)
 580 {
 581         char buf[8192];
 582         int left;
 583         struct sockaddr_nl from;
 584         socklen_t fromlen;
 585         struct nlmsghdr *h;
 586         int max_events = 10;
 587
 588 try_again:
 589         fromlen = sizeof(from);
 590         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 591                         (struct sockaddr *) &from, &fromlen);
 592         if (left < 0) {
 593                 if (errno != EINTR && errno != EAGAIN)
 594                         perror("recvfrom(netlink)");
 595                 return;
 596         }
 597
 598         h = (struct nlmsghdr *) buf;
 599         while (left >= (int) sizeof(*h)) {
 600                 int len, plen;
 601
 602                 len = h->nlmsg_len;
 603                 plen = len - sizeof(*h);
 604                 if (len > left || plen < 0) {
 605                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 606                                    "len=%d left=%d plen=%d",
 607                                    len, left, plen);
 608                         break;
 609                 }
 610
 611                 switch (h->nlmsg_type) {
 612                 case RTM_NEWLINK:
 613                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 614                                                           h, plen);
 615                         break;
 616                 case RTM_DELLINK:
 617                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 618                                                           h, plen);
 619                         break;
 620                 }
 621
 622                 len = NLMSG_ALIGN(len);
 623                 left -= len;
 624                 h = (struct nlmsghdr *) ((char *) h + len);
 625         }
 626
 627         if (left > 0) {
 628                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 629                            "message", left);
 630         }
 631
 632         if (--max_events > 0) {
 633                 /*
 634                  * Try to receive all events in one eloop call in order to
 635                  * limit race condition on cases where AssocInfo event, Assoc
 636                  * event, and EAPOL frames are received more or less at the
 637                  * same time. We want to process the event messages first
 638                  * before starting EAPOL processing.
 639                  */
 640                 goto try_again;
 641         }
 642 }
 643
 644
 645 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 646                             const u8 *frame, size_t len)
 647 {
 648         const struct ieee80211_mgmt *mgmt;
 649         union wpa_event_data event;
 650
 651         mgmt = (const struct ieee80211_mgmt *) frame;
 652         if (len < 24 + sizeof(mgmt->u.auth)) {
 653                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 654                            "frame");
 655                 return;
 656         }
 657
 658         os_memset(&event, 0, sizeof(event));
 659         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 660         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 661         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 662         if (len > 24 + sizeof(mgmt->u.auth)) {
 663                 event.auth.ies = mgmt->u.auth.variable;
 664                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 665         }
 666
 667         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 668 }
 669
 670
 671 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 672                             const u8 *frame, size_t len)
 673 {
 674         const struct ieee80211_mgmt *mgmt;
 675         union wpa_event_data event;
 676         u16 status;
 677
 678         mgmt = (const struct ieee80211_mgmt *) frame;
 679         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 680                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 681                            "frame");
 682                 return;
 683         }
 684
 685         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 686         if (status != WLAN_STATUS_SUCCESS) {
 687                 os_memset(&event, 0, sizeof(event));
 688                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 689                         event.assoc_reject.resp_ies =
 690                                 (u8 *) mgmt->u.assoc_resp.variable;
 691                         event.assoc_reject.resp_ies_len =
 692                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 693                 }
 694                 event.assoc_reject.status_code = status;
 695
 696                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 697                 return;
 698         }
 699
 700         drv->associated = 1;
 701         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 702
 703         os_memset(&event, 0, sizeof(event));
 704         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 705                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 706                 event.assoc_info.resp_ies_len =
 707                         len - 24 - sizeof(mgmt->u.assoc_resp);
 708         }
 709
 710         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 711 }
 712
 713
 714 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 715                        enum nl80211_commands cmd, struct nlattr *frame)
 716 {
 717         if (frame == NULL) {
 718                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 719                            "data", cmd);
 720                 return;
 721         }
 722
 723         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 724         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 725                     nla_data(frame), nla_len(frame));
 726
 727         switch (cmd) {
 728         case NL80211_CMD_AUTHENTICATE:
 729                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 730                 break;
 731         case NL80211_CMD_ASSOCIATE:
 732                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 733                 break;
 734         case NL80211_CMD_DEAUTHENTICATE:
 735                 drv->associated = 0;
 736                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 737                 break;
 738         case NL80211_CMD_DISASSOCIATE:
 739                 drv->associated = 0;
 740                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 741                 break;
 742         default:
 743                 break;
 744         }
 745 }
 746
 747 #endif /* HOSTAPD */
 748
 749
 750 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 751                                            struct nlattr *tb[])
 752 {
 753 #ifdef HOSTAPD
 754         if (tb[NL80211_ATTR_MAC])
 755                 hostapd_michael_mic_failure(drv->hapd,
 756                                             nla_data(tb[NL80211_ATTR_MAC]));
 757 #else /* HOSTAPD */
 758         union wpa_event_data data;
 759
 760         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 761         os_memset(&data, 0, sizeof(data));
 762         if (tb[NL80211_ATTR_MAC]) {
 763                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 764                             nla_data(tb[NL80211_ATTR_MAC]),
 765                             nla_len(tb[NL80211_ATTR_MAC]));
 766         }
 767         if (tb[NL80211_ATTR_KEY_SEQ]) {
 768                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 769                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 770                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 771         }
 772         if (tb[NL80211_ATTR_KEY_TYPE]) {
 773                 enum nl80211_key_type key_type =
 774                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 775                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 776                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 777                         data.michael_mic_failure.unicast = 1;
 778         } else
 779                 data.michael_mic_failure.unicast = 1;
 780
 781         if (tb[NL80211_ATTR_KEY_IDX]) {
 782                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 783                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 784         }
 785
 786         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 787 #endif /* HOSTAPD */
 788 }
 789
 790
 791 static int process_event(struct nl_msg *msg, void *arg)
 792 {
 793         struct wpa_driver_nl80211_data *drv = arg;
 794         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 795         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 796
 797         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 798                   genlmsg_attrlen(gnlh, 0), NULL);
 799
 800         if (tb[NL80211_ATTR_IFINDEX]) {
 801                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 802                 if (ifindex != drv->ifindex) {
 803                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 804                                    " for foreign interface (ifindex %d)",
 805                                    gnlh->cmd, ifindex);
 806                         return NL_SKIP;
 807                 }
 808         }
 809
 810         switch (gnlh->cmd) {
 811 #ifndef HOSTAPD
 812         case NL80211_CMD_NEW_SCAN_RESULTS:
 813                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 814                 drv->scan_complete_events = 1;
 815                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 816                                      drv->ctx);
 817                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 818                 break;
 819         case NL80211_CMD_SCAN_ABORTED:
 820                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 821                 /*
 822                  * Need to indicate that scan results are available in order
 823                  * not to make wpa_supplicant stop its scanning.
 824                  */
 825                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 826                                      drv->ctx);
 827                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 828                 break;
 829         case NL80211_CMD_AUTHENTICATE:
 830         case NL80211_CMD_ASSOCIATE:
 831         case NL80211_CMD_DEAUTHENTICATE:
 832         case NL80211_CMD_DISASSOCIATE:
 833                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
 834                 break;
 835 #endif /* HOSTAPD */
 836         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 837                 mlme_event_michael_mic_failure(drv, tb);
 838                 break;
 839         default:
 840                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 841                            "(cmd=%d)", gnlh->cmd);
 842                 break;
 843         }
 844
 845         return NL_SKIP;
 846 }
 847
 848
 849 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 850                                              void *sock_ctx)
 851 {
 852         struct nl_cb *cb;
 853         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 854
 855         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 856
 857         cb = nl_cb_clone(drv->nl_cb);
 858         if (!cb)
 859                 return;
 860         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 861         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 862         nl_recvmsgs(drv->nl_handle, cb);
 863         nl_cb_put(cb);
 864 }
 865
 866
 867 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 868                                    const char *ifname, int dev_up)
 869 {
 870         struct ifreq ifr;
 871
 872         if (drv->ioctl_sock < 0)
 873                 return -1;
 874
 875         os_memset(&ifr, 0, sizeof(ifr));
 876         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 877
 878         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 879                 perror("ioctl[SIOCGIFFLAGS]");
 880                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 881                            ifname);
 882                 return -1;
 883         }
 884
 885         if (dev_up) {
 886                 if (ifr.ifr_flags & IFF_UP)
 887                         return 0;
 888                 ifr.ifr_flags |= IFF_UP;
 889         } else {
 890                 if (!(ifr.ifr_flags & IFF_UP))
 891                         return 0;
 892                 ifr.ifr_flags &= ~IFF_UP;
 893         }
 894
 895         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 896                 perror("ioctl[SIOCSIFFLAGS]");
 897                 return -1;
 898         }
 899
 900         return 0;
 901 }
 902
 903
 904 /**
 905  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 906  * @priv: driver_nl80211 private data
 907  * @alpha2_arg: country to which to switch to
 908  * Returns: 0 on success, -1 on failure
 909  *
 910  * This asks nl80211 to set the regulatory domain for given
 911  * country ISO / IEC alpha2.
 912  */
 913 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 914 {
 915         struct wpa_driver_nl80211_data *drv = priv;
 916         char alpha2[3];
 917         struct nl_msg *msg;
 918
 919         msg = nlmsg_alloc();
 920         if (!msg)
 921                 return -ENOMEM;
 922
 923         alpha2[0] = alpha2_arg[0];
 924         alpha2[1] = alpha2_arg[1];
 925         alpha2[2] = '\0';
 926
 927         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 928                     0, NL80211_CMD_REQ_SET_REG, 0);
 929
 930         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 931         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 932                 return -EINVAL;
 933         return 0;
 934 nla_put_failure:
 935         return -EINVAL;
 936 }
 937
 938
 939 struct wiphy_info_data {
 940         int max_scan_ssids;
 941         int ap_supported;
 942 };
 943
 944
 945 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 946 {
 947         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 948         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 949         struct wiphy_info_data *info = arg;
 950
 951         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 952                   genlmsg_attrlen(gnlh, 0), NULL);
 953
 954         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 955                 info->max_scan_ssids =
 956                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 957
 958         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 959                 struct nlattr *nl_mode;
 960                 int i;
 961                 nla_for_each_nested(nl_mode,
 962                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 963                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 964                                 info->ap_supported = 1;
 965                                 break;
 966                         }
 967                 }
 968         }
 969
 970         return NL_SKIP;
 971 }
 972
 973
 974 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 975                                        struct wiphy_info_data *info)
 976 {
 977         struct nl_msg *msg;
 978
 979         os_memset(info, 0, sizeof(*info));
 980         msg = nlmsg_alloc();
 981         if (!msg)
 982                 return -1;
 983
 984         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 985                     0, NL80211_CMD_GET_WIPHY, 0);
 986
 987         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 988
 989         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
 990                 return 0;
 991         msg = NULL;
 992 nla_put_failure:
 993         nlmsg_free(msg);
 994         return -1;
 995 }
 996
 997
 998 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
 999 {
1000         struct wiphy_info_data info;
1001         if (wpa_driver_nl80211_get_info(drv, &info))
1002                 return;
1003         drv->has_capability = 1;
1004         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1005         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1006                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1007                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1008                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1009         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1010                 WPA_DRIVER_CAPA_ENC_WEP104 |
1011                 WPA_DRIVER_CAPA_ENC_TKIP |
1012                 WPA_DRIVER_CAPA_ENC_CCMP;
1013
1014         drv->capa.max_scan_ssids = info.max_scan_ssids;
1015         if (info.ap_supported)
1016                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1017 }
1018
1019
1020 /**
1021  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1022  * @ctx: context to be used when calling wpa_supplicant functions,
1023  * e.g., wpa_supplicant_event()
1024  * @ifname: interface name, e.g., wlan0
1025  * Returns: Pointer to private data, %NULL on failure
1026  */
1027 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1028 {
1029         int s, ret;
1030         struct sockaddr_nl local;
1031         struct wpa_driver_nl80211_data *drv;
1032
1033         drv = os_zalloc(sizeof(*drv));
1034         if (drv == NULL)
1035                 return NULL;
1036         drv->ctx = ctx;
1037         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1038 #ifdef CONFIG_AP
1039         drv->monitor_ifidx = -1;
1040         drv->monitor_sock = -1;
1041 #endif /* CONFIG_AP */
1042
1043         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1044         if (drv->nl_cb == NULL) {
1045                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1046                            "callbacks");
1047                 goto err1;
1048         }
1049
1050         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1051         if (drv->nl_handle == NULL) {
1052                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1053                            "callbacks");
1054                 goto err2;
1055         }
1056
1057         if (genl_connect(drv->nl_handle)) {
1058                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1059                            "netlink");
1060                 goto err3;
1061         }
1062
1063         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1064         if (drv->nl_cache == NULL) {
1065                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1066                            "netlink cache");
1067                 goto err3;
1068         }
1069
1070         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1071         if (drv->nl80211 == NULL) {
1072                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1073                            "found");
1074                 goto err4;
1075         }
1076
1077         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1078         if (ret >= 0)
1079                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1080         if (ret < 0) {
1081                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1082                            "membership for scan events: %d (%s)",
1083                            ret, strerror(-ret));
1084                 goto err4;
1085         }
1086
1087         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1088         if (ret >= 0)
1089                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1090         if (ret < 0) {
1091                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1092                            "membership for mlme events: %d (%s)",
1093                            ret, strerror(-ret));
1094                 goto err4;
1095         }
1096         drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1097
1098         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1099                                  wpa_driver_nl80211_event_receive, drv, ctx);
1100
1101         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1102         if (drv->ioctl_sock < 0) {
1103                 perror("socket(PF_INET,SOCK_DGRAM)");
1104                 goto err5;
1105         }
1106
1107         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1108         if (s < 0) {
1109                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1110                 goto err6;
1111         }
1112
1113         os_memset(&local, 0, sizeof(local));
1114         local.nl_family = AF_NETLINK;
1115         local.nl_groups = RTMGRP_LINK;
1116         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1117                 perror("bind(netlink)");
1118                 close(s);
1119                 goto err6;
1120         }
1121
1122 #ifndef HOSTAPD
1123         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1124                                  ctx);
1125 #endif /* HOSTAPD */
1126         drv->link_event_sock = s;
1127
1128         if (wpa_driver_nl80211_finish_drv_init(drv))
1129                 goto err7;
1130
1131         return drv;
1132
1133 err7:
1134         eloop_unregister_read_sock(drv->link_event_sock);
1135         close(drv->link_event_sock);
1136 err6:
1137         close(drv->ioctl_sock);
1138 err5:
1139         genl_family_put(drv->nl80211);
1140 err4:
1141         nl_cache_free(drv->nl_cache);
1142 err3:
1143         nl_handle_destroy(drv->nl_handle);
1144 err2:
1145         nl_cb_put(drv->nl_cb);
1146 err1:
1147         os_free(drv);
1148         return NULL;
1149 }
1150
1151
1152 static int
1153 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1154 {
1155         drv->ifindex = if_nametoindex(drv->ifname);
1156
1157         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1158                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1159                            "use managed mode");
1160         }
1161
1162         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1163                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1164                            "UP", drv->ifname);
1165                 return -1;
1166         }
1167
1168         wpa_driver_nl80211_capa(drv);
1169
1170         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1171
1172         return 0;
1173 }
1174
1175
1176 /**
1177  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1178  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1179  *
1180  * Shut down driver interface and processing of driver events. Free
1181  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1182  */
1183 static void wpa_driver_nl80211_deinit(void *priv)
1184 {
1185         struct wpa_driver_nl80211_data *drv = priv;
1186
1187 #ifdef CONFIG_AP
1188         if (drv->monitor_ifidx >= 0)
1189                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1190         if (drv->monitor_sock >= 0) {
1191                 eloop_unregister_read_sock(drv->monitor_sock);
1192                 close(drv->monitor_sock);
1193         }
1194 #endif /* CONFIG_AP */
1195
1196         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1197
1198         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1199
1200         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1201
1202         eloop_unregister_read_sock(drv->link_event_sock);
1203
1204         hostapd_set_iface_flags(drv, drv->ifname, 0);
1205         wpa_driver_nl80211_set_mode(drv, 0);
1206
1207         close(drv->link_event_sock);
1208         close(drv->ioctl_sock);
1209
1210         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1211         genl_family_put(drv->nl80211);
1212         nl_cache_free(drv->nl_cache);
1213         nl_handle_destroy(drv->nl_handle);
1214         nl_cb_put(drv->nl_cb);
1215
1216         os_free(drv);
1217 }
1218
1219
1220 /**
1221  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1222  * @eloop_ctx: Unused
1223  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1224  *
1225  * This function can be used as registered timeout when starting a scan to
1226  * generate a scan completed event if the driver does not report this.
1227  */
1228 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1229 {
1230         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1231 #ifndef HOSTAPD
1232         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1233 #endif /* HOSTAPD */
1234 }
1235
1236
1237 /**
1238  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1239  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1240  * @params: Scan parameters
1241  * Returns: 0 on success, -1 on failure
1242  */
1243 static int wpa_driver_nl80211_scan(void *priv,
1244                                    struct wpa_driver_scan_params *params)
1245 {
1246         struct wpa_driver_nl80211_data *drv = priv;
1247         int ret = 0, timeout;
1248         struct nl_msg *msg, *ssids, *freqs;
1249         size_t i;
1250
1251         msg = nlmsg_alloc();
1252         ssids = nlmsg_alloc();
1253         freqs = nlmsg_alloc();
1254         if (!msg || !ssids || !freqs) {
1255                 nlmsg_free(msg);
1256                 nlmsg_free(ssids);
1257                 nlmsg_free(freqs);
1258                 return -1;
1259         }
1260
1261         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1262                     NL80211_CMD_TRIGGER_SCAN, 0);
1263
1264         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1265
1266         for (i = 0; i < params->num_ssids; i++) {
1267                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1268                         params->ssids[i].ssid);
1269         }
1270         if (params->num_ssids)
1271                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1272
1273         if (params->extra_ies) {
1274                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1275                         params->extra_ies);
1276         }
1277
1278         if (params->freqs) {
1279                 for (i = 0; params->freqs[i]; i++)
1280                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1281                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1282         }
1283
1284         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1285         msg = NULL;
1286         if (ret) {
1287                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1288                            "(%s)", ret, strerror(-ret));
1289                 goto nla_put_failure;
1290         }
1291
1292         /* Not all drivers generate "scan completed" wireless event, so try to
1293          * read results after a timeout. */
1294         timeout = 10;
1295         if (drv->scan_complete_events) {
1296                 /*
1297                  * The driver seems to deliver events to notify when scan is
1298                  * complete, so use longer timeout to avoid race conditions
1299                  * with scanning and following association request.
1300                  */
1301                 timeout = 30;
1302         }
1303         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1304                    "seconds", ret, timeout);
1305         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1306         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1307                                drv, drv->ctx);
1308
1309 nla_put_failure:
1310         nlmsg_free(ssids);
1311         nlmsg_free(msg);
1312         nlmsg_free(freqs);
1313         return ret;
1314 }
1315
1316
1317 static int bss_info_handler(struct nl_msg *msg, void *arg)
1318 {
1319         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1320         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1321         struct nlattr *bss[NL80211_BSS_MAX + 1];
1322         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1323                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1324                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1325                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1326                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1327                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1328                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1329                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1330                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1331         };
1332         struct wpa_scan_results *res = arg;
1333         struct wpa_scan_res **tmp;
1334         struct wpa_scan_res *r;
1335         const u8 *ie;
1336         size_t ie_len;
1337
1338         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1339                   genlmsg_attrlen(gnlh, 0), NULL);
1340         if (!tb[NL80211_ATTR_BSS])
1341                 return NL_SKIP;
1342         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1343                              bss_policy))
1344                 return NL_SKIP;
1345         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1346                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1347                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1348         } else {
1349                 ie = NULL;
1350                 ie_len = 0;
1351         }
1352
1353         r = os_zalloc(sizeof(*r) + ie_len);
1354         if (r == NULL)
1355                 return NL_SKIP;
1356         if (bss[NL80211_BSS_BSSID])
1357                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1358                           ETH_ALEN);
1359         if (bss[NL80211_BSS_FREQUENCY])
1360                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1361         if (bss[NL80211_BSS_BEACON_INTERVAL])
1362                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1363         if (bss[NL80211_BSS_CAPABILITY])
1364                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1365         r->flags |= WPA_SCAN_NOISE_INVALID;
1366         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1367                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1368                 r->level /= 100; /* mBm to dBm */
1369                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1370         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1371                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1372                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1373         } else
1374                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1375         if (bss[NL80211_BSS_TSF])
1376                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1377         r->ie_len = ie_len;
1378         if (ie)
1379                 os_memcpy(r + 1, ie, ie_len);
1380
1381         tmp = os_realloc(res->res,
1382                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1383         if (tmp == NULL) {
1384                 os_free(r);
1385                 return NL_SKIP;
1386         }
1387         tmp[res->num++] = r;
1388         res->res = tmp;
1389
1390         return NL_SKIP;
1391 }
1392
1393
1394 /**
1395  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1396  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1397  * Returns: Scan results on success, -1 on failure
1398  */
1399 static struct wpa_scan_results *
1400 wpa_driver_nl80211_get_scan_results(void *priv)
1401 {
1402         struct wpa_driver_nl80211_data *drv = priv;
1403         struct nl_msg *msg;
1404         struct wpa_scan_results *res;
1405         int ret;
1406
1407         res = os_zalloc(sizeof(*res));
1408         if (res == NULL)
1409                 return 0;
1410         msg = nlmsg_alloc();
1411         if (!msg)
1412                 goto nla_put_failure;
1413
1414         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1415                     NL80211_CMD_GET_SCAN, 0);
1416         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1417
1418         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1419         msg = NULL;
1420         if (ret == 0) {
1421                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1422                            (unsigned long) res->num);
1423                 return res;
1424         }
1425         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1426                    "(%s)", ret, strerror(-ret));
1427 nla_put_failure:
1428         nlmsg_free(msg);
1429         wpa_scan_results_free(res);
1430         return NULL;
1431 }
1432
1433
1434 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1435                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1436                        const u8 *seq, size_t seq_len,
1437                        const u8 *key, size_t key_len)
1438 {
1439         struct nl_msg *msg;
1440         int ret;
1441
1442         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1443                    "set_tx=%d seq_len=%lu key_len=%lu",
1444                    __func__, ifindex, alg, addr, key_idx, set_tx,
1445                    (unsigned long) seq_len, (unsigned long) key_len);
1446
1447         msg = nlmsg_alloc();
1448         if (!msg)
1449                 return -ENOMEM;
1450
1451         if (alg == WPA_ALG_NONE) {
1452                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1453                             0, NL80211_CMD_DEL_KEY, 0);
1454         } else {
1455                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1456                             0, NL80211_CMD_NEW_KEY, 0);
1457                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1458                 switch (alg) {
1459                 case WPA_ALG_WEP:
1460                         if (key_len == 5)
1461                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1462                                             0x000FAC01);
1463                         else
1464                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1465                                             0x000FAC05);
1466                         break;
1467                 case WPA_ALG_TKIP:
1468                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1469                         break;
1470                 case WPA_ALG_CCMP:
1471                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1472                         break;
1473                 case WPA_ALG_IGTK:
1474                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1475                         break;
1476                 default:
1477                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1478                                    "algorithm %d", __func__, alg);
1479                         nlmsg_free(msg);
1480                         return -1;
1481                 }
1482         }
1483
1484         if (seq)
1485                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1486
1487         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1488         {
1489                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1490                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1491         }
1492         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1493         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1494
1495         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1496         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1497                 ret = 0;
1498         if (ret)
1499                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1500                            ret, strerror(-ret));
1501
1502         /*
1503          * If we failed or don't need to set the default TX key (below),
1504          * we're done here.
1505          */
1506         if (ret || !set_tx || alg == WPA_ALG_NONE)
1507                 return ret;
1508 #ifdef HOSTAPD /* FIX: is this needed? */
1509         if (addr)
1510                 return ret;
1511 #endif /* HOSTAPD */
1512
1513         msg = nlmsg_alloc();
1514         if (!msg)
1515                 return -ENOMEM;
1516
1517         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1518                     0, NL80211_CMD_SET_KEY, 0);
1519         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1520         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1521         if (alg == WPA_ALG_IGTK)
1522                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1523         else
1524                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1525
1526         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1527         if (ret == -ENOENT)
1528                 ret = 0;
1529         if (ret)
1530                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1531                            "err=%d %s)", ret, strerror(-ret));
1532         return ret;
1533
1534 nla_put_failure:
1535         return -ENOBUFS;
1536 }
1537
1538
1539 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1540                                       const u8 *addr, int key_idx,
1541                                       int set_tx, const u8 *seq,
1542                                       size_t seq_len,
1543                                       const u8 *key, size_t key_len)
1544 {
1545         struct wpa_driver_nl80211_data *drv = priv;
1546         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1547                            seq_len, key, key_len);
1548 }
1549
1550
1551 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1552                                    const u8 *addr, int cmd, u16 reason_code)
1553 {
1554         int ret = -1;
1555         struct nl_msg *msg;
1556
1557         msg = nlmsg_alloc();
1558         if (!msg)
1559                 return -1;
1560
1561         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1562
1563         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1564         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1565         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1566
1567         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1568         msg = NULL;
1569         if (ret) {
1570                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1571                            "(%s)", ret, strerror(-ret));
1572                 goto nla_put_failure;
1573         }
1574         ret = 0;
1575
1576 nla_put_failure:
1577         nlmsg_free(msg);
1578         return ret;
1579 }
1580
1581
1582 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1583                                              int reason_code)
1584 {
1585         struct wpa_driver_nl80211_data *drv = priv;
1586         wpa_printf(MSG_DEBUG, "%s", __func__);
1587         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1588                                        reason_code);
1589 }
1590
1591
1592 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1593                                            int reason_code)
1594 {
1595         struct wpa_driver_nl80211_data *drv = priv;
1596         wpa_printf(MSG_DEBUG, "%s", __func__);
1597         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1598                                        reason_code);
1599 }
1600
1601
1602 static int wpa_driver_nl80211_authenticate(
1603         void *priv, struct wpa_driver_auth_params *params)
1604 {
1605         struct wpa_driver_nl80211_data *drv = priv;
1606         int ret = -1, i;
1607         struct nl_msg *msg;
1608         enum nl80211_auth_type type;
1609
1610         drv->associated = 0;
1611
1612         msg = nlmsg_alloc();
1613         if (!msg)
1614                 return -1;
1615
1616         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1617                    drv->ifindex);
1618
1619         for (i = 0; i < 4; i++) {
1620                 if (!params->wep_key[i])
1621                         continue;
1622                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1623                                            i == params->wep_tx_keyidx, NULL, 0,
1624                                            params->wep_key[i],
1625                                            params->wep_key_len[i]);
1626         }
1627
1628         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1629                     NL80211_CMD_AUTHENTICATE, 0);
1630
1631         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1632         if (params->bssid) {
1633                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1634                            MAC2STR(params->bssid));
1635                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1636         }
1637         if (params->freq) {
1638                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1639                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1640         }
1641         if (params->ssid) {
1642                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1643                                   params->ssid, params->ssid_len);
1644                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1645                         params->ssid);
1646         }
1647         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1648         if (params->ie)
1649                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1650         /*
1651          * TODO: if multiple auth_alg options enabled, try them one by one if
1652          * the AP rejects authentication due to unknown auth alg
1653          */
1654         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1655                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1656         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1657                 type = NL80211_AUTHTYPE_SHARED_KEY;
1658         else if (params->auth_alg & AUTH_ALG_LEAP)
1659                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1660         else if (params->auth_alg & AUTH_ALG_FT)
1661                 type = NL80211_AUTHTYPE_FT;
1662         else
1663                 goto nla_put_failure;
1664         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1665         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1666
1667         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1668         msg = NULL;
1669         if (ret) {
1670                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1671                            "(%s)", ret, strerror(-ret));
1672                 goto nla_put_failure;
1673         }
1674         ret = 0;
1675         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1676                    "successfully");
1677
1678 nla_put_failure:
1679         nlmsg_free(msg);
1680         return ret;
1681 }
1682
1683
1684 #if defined(CONFIG_AP) || defined(HOSTAPD)
1685
1686 struct phy_info_arg {
1687         u16 *num_modes;
1688         struct hostapd_hw_modes *modes;
1689 };
1690
1691 static int phy_info_handler(struct nl_msg *msg, void *arg)
1692 {
1693         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1694         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1695         struct phy_info_arg *phy_info = arg;
1696
1697         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1698
1699         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1700         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1701                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1702                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1703                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1704                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1705                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1706                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1707         };
1708
1709         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1710         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1711                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1712                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1713         };
1714
1715         struct nlattr *nl_band;
1716         struct nlattr *nl_freq;
1717         struct nlattr *nl_rate;
1718         int rem_band, rem_freq, rem_rate;
1719         struct hostapd_hw_modes *mode;
1720         int idx, mode_is_set;
1721
1722         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1723                   genlmsg_attrlen(gnlh, 0), NULL);
1724
1725         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1726                 return NL_SKIP;
1727
1728         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1729                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1730                 if (!mode)
1731                         return NL_SKIP;
1732                 phy_info->modes = mode;
1733
1734                 mode_is_set = 0;
1735
1736                 mode = &phy_info->modes[*(phy_info->num_modes)];
1737                 memset(mode, 0, sizeof(*mode));
1738                 *(phy_info->num_modes) += 1;
1739
1740                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1741                           nla_len(nl_band), NULL);
1742
1743                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1744                         mode->ht_capab = nla_get_u16(
1745                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1746                 }
1747
1748                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1749                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1750                                   nla_len(nl_freq), freq_policy);
1751                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1752                                 continue;
1753                         mode->num_channels++;
1754                 }
1755
1756                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1757                 if (!mode->channels)
1758                         return NL_SKIP;
1759
1760                 idx = 0;
1761
1762                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1763                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1764                                   nla_len(nl_freq), freq_policy);
1765                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1766                                 continue;
1767
1768                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1769                         mode->channels[idx].flag = 0;
1770
1771                         if (!mode_is_set) {
1772                                 /* crude heuristic */
1773                                 if (mode->channels[idx].freq < 4000)
1774                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1775                                 else
1776                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1777                                 mode_is_set = 1;
1778                         }
1779
1780                         /* crude heuristic */
1781                         if (mode->channels[idx].freq < 4000)
1782                                 if (mode->channels[idx].freq == 2484)
1783                                         mode->channels[idx].chan = 14;
1784                                 else
1785                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1786                         else
1787                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1788
1789                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1790                                 mode->channels[idx].flag |=
1791                                         HOSTAPD_CHAN_DISABLED;
1792                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1793                                 mode->channels[idx].flag |=
1794                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1795                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1796                                 mode->channels[idx].flag |=
1797                                         HOSTAPD_CHAN_NO_IBSS;
1798                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1799                                 mode->channels[idx].flag |=
1800                                         HOSTAPD_CHAN_RADAR;
1801
1802                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1803                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1804                                 mode->channels[idx].max_tx_power =
1805                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1806
1807                         idx++;
1808                 }
1809
1810                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1811                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1812                                   nla_len(nl_rate), rate_policy);
1813                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1814                                 continue;
1815                         mode->num_rates++;
1816                 }
1817
1818                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1819                 if (!mode->rates)
1820                         return NL_SKIP;
1821
1822                 idx = 0;
1823
1824                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1825                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1826                                   nla_len(nl_rate), rate_policy);
1827                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1828                                 continue;
1829                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1830
1831                         /* crude heuristic */
1832                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1833                             mode->rates[idx].rate > 200)
1834                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1835
1836                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1837                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1838
1839                         idx++;
1840                 }
1841         }
1842
1843         return NL_SKIP;
1844 }
1845
1846 static struct hostapd_hw_modes *
1847 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1848 {
1849         u16 m;
1850         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1851         int i, mode11g_idx = -1;
1852
1853         /* If only 802.11g mode is included, use it to construct matching
1854          * 802.11b mode data. */
1855
1856         for (m = 0; m < *num_modes; m++) {
1857                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1858                         return modes; /* 802.11b already included */
1859                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1860                         mode11g_idx = m;
1861         }
1862
1863         if (mode11g_idx < 0)
1864                 return modes; /* 2.4 GHz band not supported at all */
1865
1866         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1867         if (nmodes == NULL)
1868                 return modes; /* Could not add 802.11b mode */
1869
1870         mode = &nmodes[*num_modes];
1871         os_memset(mode, 0, sizeof(*mode));
1872         (*num_modes)++;
1873         modes = nmodes;
1874
1875         mode->mode = HOSTAPD_MODE_IEEE80211B;
1876
1877         mode11g = &modes[mode11g_idx];
1878         mode->num_channels = mode11g->num_channels;
1879         mode->channels = os_malloc(mode11g->num_channels *
1880                                    sizeof(struct hostapd_channel_data));
1881         if (mode->channels == NULL) {
1882                 (*num_modes)--;
1883                 return modes; /* Could not add 802.11b mode */
1884         }
1885         os_memcpy(mode->channels, mode11g->channels,
1886                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
1887
1888         mode->num_rates = 0;
1889         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1890         if (mode->rates == NULL) {
1891                 os_free(mode->channels);
1892                 (*num_modes)--;
1893                 return modes; /* Could not add 802.11b mode */
1894         }
1895
1896         for (i = 0; i < mode11g->num_rates; i++) {
1897                 if (mode11g->rates[i].rate > 110 ||
1898                     mode11g->rates[i].flags &
1899                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1900                         continue;
1901                 mode->rates[mode->num_rates] = mode11g->rates[i];
1902                 mode->num_rates++;
1903                 if (mode->num_rates == 4)
1904                         break;
1905         }
1906
1907         if (mode->num_rates == 0) {
1908                 os_free(mode->channels);
1909                 os_free(mode->rates);
1910                 (*num_modes)--;
1911                 return modes; /* No 802.11b rates */
1912         }
1913
1914         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1915                    "information");
1916
1917         return modes;
1918 }
1919
1920
1921 static struct hostapd_hw_modes *
1922 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1923 {
1924         struct wpa_driver_nl80211_data *drv = priv;
1925         struct nl_msg *msg;
1926         struct phy_info_arg result = {
1927                 .num_modes = num_modes,
1928                 .modes = NULL,
1929         };
1930
1931         *num_modes = 0;
1932         *flags = 0;
1933
1934         msg = nlmsg_alloc();
1935         if (!msg)
1936                 return NULL;
1937
1938         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1939                     0, NL80211_CMD_GET_WIPHY, 0);
1940
1941         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1942
1943         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1944                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1945  nla_put_failure:
1946         return NULL;
1947 }
1948
1949
1950 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1951                                          const void *data, size_t len,
1952                                          int encrypt)
1953 {
1954         __u8 rtap_hdr[] = {
1955                 0x00, 0x00, /* radiotap version */
1956                 0x0e, 0x00, /* radiotap length */
1957                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1958                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1959                 0x00,       /* padding */
1960                 0x00, 0x00, /* RX and TX flags to indicate that */
1961                 0x00, 0x00, /* this is the injected frame directly */
1962         };
1963         struct iovec iov[2] = {
1964                 {
1965                         .iov_base = &rtap_hdr,
1966                         .iov_len = sizeof(rtap_hdr),
1967                 },
1968                 {
1969                         .iov_base = (void *) data,
1970                         .iov_len = len,
1971                 }
1972         };
1973         struct msghdr msg = {
1974                 .msg_name = NULL,
1975                 .msg_namelen = 0,
1976                 .msg_iov = iov,
1977                 .msg_iovlen = 2,
1978                 .msg_control = NULL,
1979                 .msg_controllen = 0,
1980                 .msg_flags = 0,
1981         };
1982
1983         if (encrypt)
1984                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
1985
1986         return sendmsg(drv->monitor_sock, &msg, 0);
1987 }
1988
1989
1990 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
1991                                         size_t data_len)
1992 {
1993         struct wpa_driver_nl80211_data *drv = priv;
1994         struct ieee80211_mgmt *mgmt;
1995         int do_not_encrypt = 0;
1996         u16 fc;
1997
1998         mgmt = (struct ieee80211_mgmt *) data;
1999         fc = le_to_host16(mgmt->frame_control);
2000
2001         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2002             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2003                 /*
2004                  * Only one of the authentication frame types is encrypted.
2005                  * In order for static WEP encryption to work properly (i.e.,
2006                  * to not encrypt the frame), we need to tell mac80211 about
2007                  * the frames that must not be encrypted.
2008                  */
2009                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2010                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2011                 if (auth_alg == WLAN_AUTH_OPEN ||
2012                     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2013                         do_not_encrypt = 1;
2014         }
2015
2016         return wpa_driver_nl80211_send_frame(drv, data, data_len,
2017                                              !do_not_encrypt);
2018 }
2019
2020 #endif /* CONFIG_AP || HOSTAPD */
2021
2022
2023 #ifdef CONFIG_AP
2024
2025 static int wpa_driver_nl80211_set_beacon(void *priv,
2026                                          const u8 *head, size_t head_len,
2027                                          const u8 *tail, size_t tail_len,
2028                                          int dtim_period)
2029 {
2030         struct wpa_driver_nl80211_data *drv = priv;
2031         struct nl_msg *msg;
2032         u8 cmd = NL80211_CMD_NEW_BEACON;
2033         int ret;
2034
2035         msg = nlmsg_alloc();
2036         if (!msg)
2037                 return -ENOMEM;
2038
2039         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2040                    drv->beacon_set);
2041         if (drv->beacon_set)
2042                 cmd = NL80211_CMD_SET_BEACON;
2043
2044         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2045                     0, cmd, 0);
2046         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2047         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2048         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2049         if (!drv->beacon_int)
2050                 drv->beacon_int = 100;
2051         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2052         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2053
2054         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2055         if (ret) {
2056                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2057                            ret, strerror(-ret));
2058         } else
2059                 drv->beacon_set = 1;
2060         return ret;
2061  nla_put_failure:
2062         return -ENOBUFS;
2063 }
2064
2065
2066 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2067 {
2068         struct wpa_driver_nl80211_data *drv = priv;
2069         struct nl_msg *msg;
2070
2071         drv->beacon_int = value;
2072
2073         if (!drv->beacon_set)
2074                 return 0;
2075
2076         msg = nlmsg_alloc();
2077         if (!msg)
2078                 return -ENOMEM;
2079
2080         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
2081                    "(beacon_set=%d)", value, drv->beacon_set);
2082         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2083                     0, NL80211_CMD_SET_BEACON, 0);
2084         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2085
2086         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2087
2088         return send_and_recv_msgs(drv, msg, NULL, NULL);
2089  nla_put_failure:
2090         return -ENOBUFS;
2091 }
2092
2093
2094 static int wpa_driver_nl80211_set_freq2(
2095         struct wpa_driver_nl80211_data *drv,
2096         struct wpa_driver_associate_params *params)
2097 {
2098         struct nl_msg *msg;
2099         int ret;
2100
2101         msg = nlmsg_alloc();
2102         if (!msg)
2103                 return -1;
2104
2105         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2106                     NL80211_CMD_SET_WIPHY, 0);
2107
2108         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2109
2110         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2111
2112         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2113         if (ret == 0)
2114                 return 0;
2115         wpa_printf(MSG_DEBUG, "nl80211: MLME Failed to set channel (freq=%d): "
2116                    "%d (%s)", params->freq, ret, strerror(-ret));
2117 nla_put_failure:
2118         return -1;
2119 }
2120
2121 #endif /* CONFIG_AP */
2122
2123 #if defined(CONFIG_AP) || defined(HOSTAPD)
2124
2125 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2126                                  int ifidx)
2127 {
2128         struct nl_msg *msg;
2129
2130 #ifdef HOSTAPD
2131         /* stop listening for EAPOL on this interface */
2132         del_ifidx(drv, ifidx);
2133 #endif /* HOSTAPD */
2134
2135         msg = nlmsg_alloc();
2136         if (!msg)
2137                 goto nla_put_failure;
2138
2139         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2140                     0, NL80211_CMD_DEL_INTERFACE, 0);
2141         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2142
2143         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2144                 return;
2145  nla_put_failure:
2146         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2147                    ifidx);
2148 }
2149
2150
2151 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2152                                 const char *ifname, enum nl80211_iftype iftype,
2153                                 const u8 *addr)
2154 {
2155         struct nl_msg *msg, *flags = NULL;
2156         int ifidx;
2157         int ret = -ENOBUFS;
2158 #ifdef HOSTAPD
2159         struct ifreq ifreq;
2160         struct iwreq iwr;
2161 #endif /* HOSTAPD */
2162
2163         msg = nlmsg_alloc();
2164         if (!msg)
2165                 return -1;
2166
2167         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2168                     0, NL80211_CMD_NEW_INTERFACE, 0);
2169         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2170         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2171         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2172
2173         if (iftype == NL80211_IFTYPE_MONITOR) {
2174                 int err;
2175
2176                 flags = nlmsg_alloc();
2177                 if (!flags)
2178                         goto nla_put_failure;
2179
2180                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2181
2182                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2183
2184                 nlmsg_free(flags);
2185
2186                 if (err)
2187                         goto nla_put_failure;
2188         }
2189
2190         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2191         if (ret) {
2192  nla_put_failure:
2193                 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2194                            ifname);
2195                 return ret;
2196         }
2197
2198         ifidx = if_nametoindex(ifname);
2199
2200         if (ifidx <= 0)
2201                 return -1;
2202
2203 #ifdef HOSTAPD
2204         /* start listening for EAPOL on this interface */
2205         add_ifidx(drv, ifidx);
2206
2207         if (addr) {
2208                 switch (iftype) {
2209                 case NL80211_IFTYPE_AP:
2210                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
2211                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
2212                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2213
2214                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
2215                                 nl80211_remove_iface(drv, ifidx);
2216                                 return -1;
2217                         }
2218                         break;
2219                 case NL80211_IFTYPE_WDS:
2220                         memset(&iwr, 0, sizeof(iwr));
2221                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
2222                         iwr.u.addr.sa_family = ARPHRD_ETHER;
2223                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
2224                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
2225                                 return -1;
2226                         break;
2227                 default:
2228                         /* nothing */
2229                         break;
2230                 }
2231         }
2232 #endif /* HOSTAPD */
2233
2234         return ifidx;
2235 }
2236
2237 #endif /* CONFIG_AP || HOSTAPD */
2238
2239 #ifdef CONFIG_AP
2240
2241 void ap_tx_status(void *ctx, const u8 *addr,
2242                   const u8 *buf, size_t len, int ack);
2243 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2244 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2245                 struct hostapd_frame_info *fi);
2246 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2247
2248 #endif /* CONFIG_AP */
2249
2250 #if defined(CONFIG_AP) || defined(HOSTAPD)
2251
2252 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2253 {
2254         struct ieee80211_hdr *hdr;
2255         u16 fc, type, stype;
2256
2257         hdr = (struct ieee80211_hdr *) buf;
2258         fc = le_to_host16(hdr->frame_control);
2259
2260         type = WLAN_FC_GET_TYPE(fc);
2261         stype = WLAN_FC_GET_STYPE(fc);
2262
2263         switch (type) {
2264         case WLAN_FC_TYPE_MGMT:
2265                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2266                            ok ? "ACK" : "fail");
2267 #ifdef HOSTAPD
2268                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2269 #else /* HOSTAPD */
2270                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2271 #endif /* HOSTAPD */
2272                 break;
2273         case WLAN_FC_TYPE_CTRL:
2274                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2275                            ok ? "ACK" : "fail");
2276                 break;
2277         case WLAN_FC_TYPE_DATA:
2278 #ifdef HOSTAPD
2279                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2280 #else /* HOSTAPD */
2281                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2282 #endif /* HOSTAPD */
2283                 break;
2284         default:
2285                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2286                            type);
2287                 break;
2288         }
2289 }
2290
2291 #endif /* CONFIG_AP || HOSTAPD */
2292
2293 #ifdef CONFIG_AP
2294
2295 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2296                          u8 *buf, size_t len,
2297                          struct hostapd_frame_info *hfi,
2298                          enum ieee80211_msg_type msg_type)
2299 {
2300         struct ieee80211_hdr *hdr;
2301         u16 fc, type, stype;
2302         size_t data_len = len;
2303
2304         /*
2305          * PS-Poll frames are 16 bytes. All other frames are
2306          * 24 bytes or longer.
2307          */
2308         if (len < 16)
2309                 return;
2310
2311         hdr = (struct ieee80211_hdr *) buf;
2312         fc = le_to_host16(hdr->frame_control);
2313
2314         type = WLAN_FC_GET_TYPE(fc);
2315         stype = WLAN_FC_GET_STYPE(fc);
2316
2317         switch (type) {
2318         case WLAN_FC_TYPE_DATA:
2319                 if (len < 24)
2320                         return;
2321                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2322                 case WLAN_FC_TODS:
2323                         break;
2324                 case WLAN_FC_FROMDS:
2325                         break;
2326                 default:
2327                         /* discard */
2328                         return;
2329                 }
2330                 break;
2331         case WLAN_FC_TYPE_CTRL:
2332                 /* discard non-ps-poll frames */
2333                 if (stype != WLAN_FC_STYPE_PSPOLL)
2334                         return;
2335                 break;
2336         case WLAN_FC_TYPE_MGMT:
2337                 break;
2338         default:
2339                 /* discard */
2340                 return;
2341         }
2342
2343         switch (msg_type) {
2344         case ieee80211_msg_normal:
2345                 /* continue processing */
2346                 break;
2347         case ieee80211_msg_tx_callback_ack:
2348                 handle_tx_callback(drv->ctx, buf, data_len, 1);
2349                 return;
2350         case ieee80211_msg_tx_callback_fail:
2351                 handle_tx_callback(drv->ctx, buf, data_len, 0);
2352                 return;
2353         }
2354
2355         switch (type) {
2356         case WLAN_FC_TYPE_MGMT:
2357                 if (stype != WLAN_FC_STYPE_BEACON &&
2358                     stype != WLAN_FC_STYPE_PROBE_REQ)
2359                         wpa_printf(MSG_MSGDUMP, "MGMT");
2360                 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2361                 break;
2362         case WLAN_FC_TYPE_CTRL:
2363                 /* can only get here with PS-Poll frames */
2364                 wpa_printf(MSG_DEBUG, "CTRL");
2365                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2366                 break;
2367         case WLAN_FC_TYPE_DATA:
2368                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2369                 break;
2370         }
2371 }
2372
2373 #endif /* CONFIG_AP */
2374
2375 #if defined(CONFIG_AP) || defined(HOSTAPD)
2376
2377 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2378 {
2379         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2380         int len;
2381         unsigned char buf[3000];
2382         struct ieee80211_radiotap_iterator iter;
2383         int ret;
2384         struct hostapd_frame_info hfi;
2385         int injected = 0, failed = 0, msg_type, rxflags = 0;
2386
2387         len = recv(sock, buf, sizeof(buf), 0);
2388         if (len < 0) {
2389                 perror("recv");
2390                 return;
2391         }
2392
2393         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2394                 printf("received invalid radiotap frame\n");
2395                 return;
2396         }
2397
2398         memset(&hfi, 0, sizeof(hfi));
2399
2400         while (1) {
2401                 ret = ieee80211_radiotap_iterator_next(&iter);
2402                 if (ret == -ENOENT)
2403                         break;
2404                 if (ret) {
2405                         printf("received invalid radiotap frame (%d)\n", ret);
2406                         return;
2407                 }
2408                 switch (iter.this_arg_index) {
2409                 case IEEE80211_RADIOTAP_FLAGS:
2410                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2411                                 len -= 4;
2412                         break;
2413                 case IEEE80211_RADIOTAP_RX_FLAGS:
2414                         rxflags = 1;
2415                         break;
2416                 case IEEE80211_RADIOTAP_TX_FLAGS:
2417                         injected = 1;
2418                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2419                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2420                         break;
2421                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2422                         break;
2423                 case IEEE80211_RADIOTAP_CHANNEL:
2424                         /* TODO convert from freq/flags to channel number
2425                         hfi.channel = XXX;
2426                         hfi.phytype = XXX;
2427                          */
2428                         break;
2429                 case IEEE80211_RADIOTAP_RATE:
2430                         hfi.datarate = *iter.this_arg * 5;
2431                         break;
2432                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2433                         hfi.ssi_signal = *iter.this_arg;
2434                         break;
2435                 }
2436         }
2437
2438         if (rxflags && injected)
2439                 return;
2440
2441         if (!injected)
2442                 msg_type = ieee80211_msg_normal;
2443         else if (failed)
2444                 msg_type = ieee80211_msg_tx_callback_fail;
2445         else
2446                 msg_type = ieee80211_msg_tx_callback_ack;
2447
2448         handle_frame(drv, buf + iter.max_length,
2449                      len - iter.max_length, &hfi, msg_type);
2450 }
2451
2452
2453 /*
2454  * we post-process the filter code later and rewrite
2455  * this to the offset to the last instruction
2456  */
2457 #define PASS    0xFF
2458 #define FAIL    0xFE
2459
2460 static struct sock_filter msock_filter_insns[] = {
2461         /*
2462          * do a little-endian load of the radiotap length field
2463          */
2464         /* load lower byte into A */
2465         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2466         /* put it into X (== index register) */
2467         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2468         /* load upper byte into A */
2469         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2470         /* left-shift it by 8 */
2471         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2472         /* or with X */
2473         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2474         /* put result into X */
2475         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2476
2477         /*
2478          * Allow management frames through, this also gives us those
2479          * management frames that we sent ourselves with status
2480          */
2481         /* load the lower byte of the IEEE 802.11 frame control field */
2482         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2483         /* mask off frame type and version */
2484         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2485         /* accept frame if it's both 0, fall through otherwise */
2486         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2487
2488         /*
2489          * TODO: add a bit to radiotap RX flags that indicates
2490          * that the sending station is not associated, then
2491          * add a filter here that filters on our DA and that flag
2492          * to allow us to deauth frames to that bad station.
2493          *
2494          * Not a regression -- we didn't do it before either.
2495          */
2496
2497 #if 0
2498         /*
2499          * drop non-data frames, WDS frames
2500          */
2501         /* load the lower byte of the frame control field */
2502         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2503         /* mask off QoS bit */
2504         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2505         /* drop non-data frames */
2506         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2507         /* load the upper byte of the frame control field */
2508         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2509         /* mask off toDS/fromDS */
2510         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2511         /* drop WDS frames */
2512         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2513 #endif
2514
2515         /*
2516          * add header length to index
2517          */
2518         /* load the lower byte of the frame control field */
2519         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2520         /* mask off QoS bit */
2521         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2522         /* right shift it by 6 to give 0 or 2 */
2523         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2524         /* add data frame header length */
2525         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2526         /* add index, was start of 802.11 header */
2527         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2528         /* move to index, now start of LL header */
2529         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2530
2531         /*
2532          * Accept empty data frames, we use those for
2533          * polling activity.
2534          */
2535         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2536         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2537
2538         /*
2539          * Accept EAPOL frames
2540          */
2541         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2542         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2543         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2544         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2545
2546         /* keep these last two statements or change the code below */
2547         /* return 0 == "DROP" */
2548         BPF_STMT(BPF_RET | BPF_K, 0),
2549         /* return ~0 == "keep all" */
2550         BPF_STMT(BPF_RET | BPF_K, ~0),
2551 };
2552
2553 static struct sock_fprog msock_filter = {
2554         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2555         .filter = msock_filter_insns,
2556 };
2557
2558
2559 static int add_monitor_filter(int s)
2560 {
2561         int idx;
2562
2563         /* rewrite all PASS/FAIL jump offsets */
2564         for (idx = 0; idx < msock_filter.len; idx++) {
2565                 struct sock_filter *insn = &msock_filter_insns[idx];
2566
2567                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2568                         if (insn->code == (BPF_JMP|BPF_JA)) {
2569                                 if (insn->k == PASS)
2570                                         insn->k = msock_filter.len - idx - 2;
2571                                 else if (insn->k == FAIL)
2572                                         insn->k = msock_filter.len - idx - 3;
2573                         }
2574
2575                         if (insn->jt == PASS)
2576                                 insn->jt = msock_filter.len - idx - 2;
2577                         else if (insn->jt == FAIL)
2578                                 insn->jt = msock_filter.len - idx - 3;
2579
2580                         if (insn->jf == PASS)
2581                                 insn->jf = msock_filter.len - idx - 2;
2582                         else if (insn->jf == FAIL)
2583                                 insn->jf = msock_filter.len - idx - 3;
2584                 }
2585         }
2586
2587         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2588                        &msock_filter, sizeof(msock_filter))) {
2589                 perror("SO_ATTACH_FILTER");
2590                 return -1;
2591         }
2592
2593         return 0;
2594 }
2595
2596
2597 static int
2598 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2599 {
2600         char buf[IFNAMSIZ];
2601         struct sockaddr_ll ll;
2602         int optval;
2603         socklen_t optlen;
2604
2605         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2606         buf[IFNAMSIZ - 1] = '\0';
2607
2608         drv->monitor_ifidx =
2609                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2610
2611         if (drv->monitor_ifidx < 0)
2612                 return -1;
2613
2614         if (hostapd_set_iface_flags(drv, buf, 1))
2615                 goto error;
2616
2617         memset(&ll, 0, sizeof(ll));
2618         ll.sll_family = AF_PACKET;
2619         ll.sll_ifindex = drv->monitor_ifidx;
2620         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2621         if (drv->monitor_sock < 0) {
2622                 perror("socket[PF_PACKET,SOCK_RAW]");
2623                 goto error;
2624         }
2625
2626         if (add_monitor_filter(drv->monitor_sock)) {
2627                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2628                            "interface; do filtering in user space");
2629                 /* This works, but will cost in performance. */
2630         }
2631
2632         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2633                 perror("monitor socket bind");
2634                 goto error;
2635         }
2636
2637         optlen = sizeof(optval);
2638         optval = 20;
2639         if (setsockopt
2640             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2641                 perror("Failed to set socket priority");
2642                 goto error;
2643         }
2644
2645         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2646                                      drv, NULL)) {
2647                 printf("Could not register monitor read socket\n");
2648                 goto error;
2649         }
2650
2651         return 0;
2652  error:
2653         nl80211_remove_iface(drv, drv->monitor_ifidx);
2654         return -1;
2655 }
2656
2657 #endif /* CONFIG_AP || HOSTAPD */
2658
2659 #ifdef CONFIG_AP
2660
2661 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2662                                  struct wpa_driver_associate_params *params)
2663 {
2664         if (drv->monitor_ifidx < 0 &&
2665             nl80211_create_monitor_interface(drv))
2666                 return -1;
2667
2668         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2669             wpa_driver_nl80211_set_freq2(drv, params)) {
2670                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2671                 drv->monitor_ifidx = -1;
2672                 return -1;
2673         }
2674
2675         /* TODO: setup monitor interface (and add code somewhere to remove this
2676          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2677
2678         return 0;
2679 }
2680 #endif /* CONFIG_AP */
2681
2682
2683 static int wpa_driver_nl80211_associate(
2684         void *priv, struct wpa_driver_associate_params *params)
2685 {
2686         struct wpa_driver_nl80211_data *drv = priv;
2687         int ret = -1;
2688         struct nl_msg *msg;
2689
2690 #ifdef CONFIG_AP
2691         if (params->mode == 2)
2692                 return wpa_driver_nl80211_ap(drv, params);
2693 #endif /* CONFIG_AP */
2694
2695         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2696                                           params->drop_unencrypted);
2697
2698         drv->associated = 0;
2699
2700         msg = nlmsg_alloc();
2701         if (!msg)
2702                 return -1;
2703
2704         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2705                    drv->ifindex);
2706         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2707                     NL80211_CMD_ASSOCIATE, 0);
2708
2709         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2710         if (params->bssid) {
2711                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2712                            MAC2STR(params->bssid));
2713                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2714         }
2715         if (params->freq) {
2716                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2717                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2718         }
2719         if (params->ssid) {
2720                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2721                                   params->ssid, params->ssid_len);
2722                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2723                         params->ssid);
2724                 if (params->ssid_len > sizeof(drv->ssid))
2725                         goto nla_put_failure;
2726                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2727                 drv->ssid_len = params->ssid_len;
2728         }
2729         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
2730         if (params->wpa_ie)
2731                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2732                         params->wpa_ie);
2733
2734         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2735         msg = NULL;
2736         if (ret) {
2737                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2738                            "(%s)", ret, strerror(-ret));
2739                 goto nla_put_failure;
2740         }
2741         ret = 0;
2742         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2743                    "successfully");
2744
2745 nla_put_failure:
2746         nlmsg_free(msg);
2747         return ret;
2748 }
2749
2750
2751 /**
2752  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2753  * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2754  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2755  * Returns: 0 on success, -1 on failure
2756  */
2757 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2758                                        int mode)
2759 {
2760         int ret = -1;
2761         struct nl_msg *msg;
2762         int nlmode;
2763
2764         switch (mode) {
2765         case 0:
2766                 nlmode = NL80211_IFTYPE_STATION;
2767                 break;
2768         case 1:
2769                 nlmode = NL80211_IFTYPE_ADHOC;
2770                 break;
2771         case 2:
2772                 nlmode = NL80211_IFTYPE_AP;
2773                 break;
2774         default:
2775                 return -1;
2776         }
2777
2778         msg = nlmsg_alloc();
2779         if (!msg)
2780                 return -1;
2781
2782         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2783                     0, NL80211_CMD_SET_INTERFACE, 0);
2784         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2785         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2786
2787         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2788         if (!ret)
2789                 return 0;
2790         else
2791                 goto try_again;
2792
2793 nla_put_failure:
2794         wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2795                    ret, strerror(-ret));
2796         return -1;
2797
2798 try_again:
2799         /* mac80211 doesn't allow mode changes while the device is up, so
2800          * take the device down, try to set the mode again, and bring the
2801          * device back up.
2802          */
2803         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2804                 /* Try to set the mode again while the interface is down */
2805                 msg = nlmsg_alloc();
2806                 if (!msg)
2807                         return -1;
2808
2809                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2810                             0, NL80211_CMD_SET_INTERFACE, 0);
2811                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2812                 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2813                 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2814                 if (ret) {
2815                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
2816                                    "mode(try_again): %d (%s)",
2817                                    drv->ifname, ret, strerror(-ret));
2818                 }
2819
2820                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2821                         ret = -1;
2822         }
2823
2824         return ret;
2825 }
2826
2827
2828 static int wpa_driver_nl80211_get_capa(void *priv,
2829                                        struct wpa_driver_capa *capa)
2830 {
2831         struct wpa_driver_nl80211_data *drv = priv;
2832         if (!drv->has_capability)
2833                 return -1;
2834         os_memcpy(capa, &drv->capa, sizeof(*capa));
2835         return 0;
2836 }
2837
2838
2839 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2840 {
2841         struct wpa_driver_nl80211_data *drv = priv;
2842
2843         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2844                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2845         drv->operstate = state;
2846         return wpa_driver_nl80211_send_oper_ifla(
2847                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2848 }
2849
2850
2851 #ifdef HOSTAPD
2852
2853 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2854
2855 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2856 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2857
2858
2859 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2860                                  const char *iface)
2861 {
2862         struct i802_bss *bss = &drv->bss;
2863         while (bss) {
2864                 if (os_strncmp(iface, bss->ifname, IFNAMSIZ) == 0)
2865                         return bss;
2866                 bss = bss->next;
2867         }
2868         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%s) failed", iface);
2869         return NULL;
2870 }
2871
2872
2873 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2874 {
2875         int i;
2876         int *old;
2877
2878         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
2879                    ifidx);
2880         for (i = 0; i < drv->num_if_indices; i++) {
2881                 if (drv->if_indices[i] == 0) {
2882                         drv->if_indices[i] = ifidx;
2883                         return;
2884                 }
2885         }
2886
2887         if (drv->if_indices != drv->default_if_indices)
2888                 old = drv->if_indices;
2889         else
2890                 old = NULL;
2891
2892         drv->if_indices = realloc(old,
2893                                   sizeof(int) * (drv->num_if_indices + 1));
2894         if (!drv->if_indices) {
2895                 if (!old)
2896                         drv->if_indices = drv->default_if_indices;
2897                 else
2898                         drv->if_indices = old;
2899                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
2900                            "interfaces");
2901                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
2902                 return;
2903         }
2904         drv->if_indices[drv->num_if_indices] = ifidx;
2905         drv->num_if_indices++;
2906 }
2907
2908
2909 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2910 {
2911         int i;
2912
2913         for (i = 0; i < drv->num_if_indices; i++) {
2914                 if (drv->if_indices[i] == ifidx) {
2915                         drv->if_indices[i] = 0;
2916                         break;
2917                 }
2918         }
2919 }
2920
2921
2922 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2923 {
2924         int i;
2925
2926         for (i = 0; i < drv->num_if_indices; i++)
2927                 if (drv->if_indices[i] == ifidx)
2928                         return 1;
2929
2930         return 0;
2931 }
2932
2933
2934 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
2935                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
2936                         size_t seq_len, const u8 *key, size_t key_len)
2937 {
2938         struct wpa_driver_nl80211_data *drv = priv;
2939         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
2940                            set_tx, seq, seq_len, key, key_len);
2941 }
2942
2943
2944 static inline int min_int(int a, int b)
2945 {
2946         if (a < b)
2947                 return a;
2948         return b;
2949 }
2950
2951
2952 static int get_key_handler(struct nl_msg *msg, void *arg)
2953 {
2954         struct nlattr *tb[NL80211_ATTR_MAX + 1];
2955         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2956
2957         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2958                   genlmsg_attrlen(gnlh, 0), NULL);
2959
2960         /*
2961          * TODO: validate the key index and mac address!
2962          * Otherwise, there's a race condition as soon as
2963          * the kernel starts sending key notifications.
2964          */
2965
2966         if (tb[NL80211_ATTR_KEY_SEQ])
2967                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
2968                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
2969         return NL_SKIP;
2970 }
2971
2972
2973 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
2974                            int idx, u8 *seq)
2975 {
2976         struct wpa_driver_nl80211_data *drv = priv;
2977         struct nl_msg *msg;
2978
2979         msg = nlmsg_alloc();
2980         if (!msg)
2981                 return -ENOMEM;
2982
2983         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2984                     0, NL80211_CMD_GET_KEY, 0);
2985
2986         if (addr)
2987                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2988         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
2989         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
2990
2991         memset(seq, 0, 6);
2992
2993         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
2994  nla_put_failure:
2995         return -ENOBUFS;
2996 }
2997
2998
2999 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3000                               int mode)
3001 {
3002         struct wpa_driver_nl80211_data *drv = priv;
3003         struct nl_msg *msg;
3004         u8 rates[NL80211_MAX_SUPP_RATES];
3005         u8 rates_len = 0;
3006         int i;
3007
3008         msg = nlmsg_alloc();
3009         if (!msg)
3010                 return -ENOMEM;
3011
3012         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3013                     NL80211_CMD_SET_BSS, 0);
3014
3015         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3016                 rates[rates_len++] = basic_rates[i] / 5;
3017
3018         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3019
3020         /* TODO: multi-BSS support */
3021         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3022
3023         return send_and_recv_msgs(drv, msg, NULL, NULL);
3024  nla_put_failure:
3025         return -ENOBUFS;
3026 }
3027
3028
3029 /* Set kernel driver on given frequency (MHz) */
3030 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3031 {
3032         struct wpa_driver_nl80211_data *drv = priv;
3033         struct nl_msg *msg;
3034
3035         msg = nlmsg_alloc();
3036         if (!msg)
3037                 return -1;
3038
3039         drv->last_freq = freq->freq;
3040         drv->last_freq_ht = freq->ht_enabled;
3041
3042         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3043                     NL80211_CMD_SET_WIPHY, 0);
3044
3045         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3046         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq);
3047         if (freq->ht_enabled) {
3048                 switch (freq->sec_channel_offset) {
3049                 case -1:
3050                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3051                                     NL80211_CHAN_HT40MINUS);
3052                         break;
3053                 case 1:
3054                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3055                                     NL80211_CHAN_HT40PLUS);
3056                         break;
3057                 default:
3058                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3059                                     NL80211_CHAN_HT20);
3060                         break;
3061                 }
3062         }
3063
3064         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3065                 return 0;
3066  nla_put_failure:
3067         return -1;
3068 }
3069
3070
3071 static int i802_set_rts(void *priv, int rts)
3072 {
3073         struct wpa_driver_nl80211_data *drv = priv;
3074         struct iwreq iwr;
3075
3076         memset(&iwr, 0, sizeof(iwr));
3077         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3078         iwr.u.rts.value = rts;
3079         iwr.u.rts.fixed = 1;
3080
3081         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3082                 perror("ioctl[SIOCSIWRTS]");
3083                 return -1;
3084         }
3085
3086         return 0;
3087 }
3088
3089
3090 static int i802_set_frag(void *priv, int frag)
3091 {
3092         struct wpa_driver_nl80211_data *drv = priv;
3093         struct iwreq iwr;
3094
3095         memset(&iwr, 0, sizeof(iwr));
3096         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3097         iwr.u.frag.value = frag;
3098         iwr.u.frag.fixed = 1;
3099
3100         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3101                 perror("ioctl[SIOCSIWFRAG]");
3102                 return -1;
3103         }
3104
3105         return 0;
3106 }
3107
3108
3109 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3110 {
3111         struct wpa_driver_nl80211_data *drv = priv;
3112         struct iwreq iwr;
3113
3114         memset(&iwr, 0, sizeof(iwr));
3115         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3116
3117         iwr.u.retry.value = short_retry;
3118         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3119         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3120                 perror("ioctl[SIOCSIWRETRY(short)]");
3121                 return -1;
3122         }
3123
3124         iwr.u.retry.value = long_retry;
3125         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3126         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3127                 perror("ioctl[SIOCSIWRETRY(long)]");
3128                 return -1;
3129         }
3130
3131         return 0;
3132 }
3133
3134
3135 static int i802_flush(void *priv)
3136 {
3137         struct wpa_driver_nl80211_data *drv = priv;
3138         struct nl_msg *msg;
3139
3140         msg = nlmsg_alloc();
3141         if (!msg)
3142                 return -1;
3143
3144         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3145                     0, NL80211_CMD_DEL_STATION, 0);
3146
3147         /*
3148          * XXX: FIX! this needs to flush all VLANs too
3149          */
3150         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3151                     if_nametoindex(drv->ifname));
3152
3153         return send_and_recv_msgs(drv, msg, NULL, NULL);
3154  nla_put_failure:
3155         return -ENOBUFS;
3156 }
3157
3158
3159 static int get_sta_handler(struct nl_msg *msg, void *arg)
3160 {
3161         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3162         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3163         struct hostap_sta_driver_data *data = arg;
3164         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3165         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3166                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3167                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3168                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3169                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3170                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3171         };
3172
3173         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3174                   genlmsg_attrlen(gnlh, 0), NULL);
3175
3176         /*
3177          * TODO: validate the interface and mac address!
3178          * Otherwise, there's a race condition as soon as
3179          * the kernel starts sending station notifications.
3180          */
3181
3182         if (!tb[NL80211_ATTR_STA_INFO]) {
3183                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3184                 return NL_SKIP;
3185         }
3186         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3187                              tb[NL80211_ATTR_STA_INFO],
3188                              stats_policy)) {
3189                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3190                 return NL_SKIP;
3191         }
3192
3193         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3194                 data->inactive_msec =
3195                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3196         if (stats[NL80211_STA_INFO_RX_BYTES])
3197                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3198         if (stats[NL80211_STA_INFO_TX_BYTES])
3199                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3200         if (stats[NL80211_STA_INFO_RX_PACKETS])
3201                 data->rx_packets =
3202                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3203         if (stats[NL80211_STA_INFO_TX_PACKETS])
3204                 data->tx_packets =
3205                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3206
3207         return NL_SKIP;
3208 }
3209
3210 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3211                               const u8 *addr)
3212 {
3213         struct wpa_driver_nl80211_data *drv = priv;
3214         struct nl_msg *msg;
3215
3216         os_memset(data, 0, sizeof(*data));
3217         msg = nlmsg_alloc();
3218         if (!msg)
3219                 return -ENOMEM;
3220
3221         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3222                     0, NL80211_CMD_GET_STATION, 0);
3223
3224         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3225         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3226
3227         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3228  nla_put_failure:
3229         return -ENOBUFS;
3230 }
3231
3232
3233 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3234                            size_t data_len, int encrypt, const u8 *own_addr)
3235 {
3236         struct wpa_driver_nl80211_data *drv = priv;
3237         struct ieee80211_hdr *hdr;
3238         size_t len;
3239         u8 *pos;
3240         int res;
3241 #if 0 /* FIX */
3242         int qos = sta->flags & WLAN_STA_WME;
3243 #else
3244         int qos = 0;
3245 #endif
3246
3247         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3248                 data_len;
3249         hdr = os_zalloc(len);
3250         if (hdr == NULL) {
3251                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3252                        (unsigned long) len);
3253                 return -1;
3254         }
3255
3256         hdr->frame_control =
3257                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3258         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3259         if (encrypt)
3260                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3261 #if 0 /* To be enabled if qos determination is added above */
3262         if (qos) {
3263                 hdr->frame_control |=
3264                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3265         }
3266 #endif
3267
3268         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3269         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3270         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3271         pos = (u8 *) (hdr + 1);
3272
3273 #if 0 /* To be enabled if qos determination is added above */
3274         if (qos) {
3275                 /* add an empty QoS header if needed */
3276                 pos[0] = 0;
3277                 pos[1] = 0;
3278                 pos += 2;
3279         }
3280 #endif
3281
3282         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3283         pos += sizeof(rfc1042_header);
3284         WPA_PUT_BE16(pos, ETH_P_PAE);
3285         pos += 2;
3286         memcpy(pos, data, data_len);
3287
3288         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3289         if (res < 0) {
3290                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3291                            "failed: %d (%s)",
3292                            (unsigned long) len, errno, strerror(errno));
3293         }
3294         free(hdr);
3295
3296         return res;
3297 }
3298
3299
3300 static int i802_sta_add(const char *ifname, void *priv,
3301                         struct hostapd_sta_add_params *params)
3302 {
3303         struct wpa_driver_nl80211_data *drv = priv;
3304         struct nl_msg *msg;
3305         int ret = -ENOBUFS;
3306
3307         msg = nlmsg_alloc();
3308         if (!msg)
3309                 return -ENOMEM;
3310
3311         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3312                     0, NL80211_CMD_NEW_STATION, 0);
3313
3314         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3315                     if_nametoindex(drv->ifname));
3316         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3317         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3318         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3319                 params->supp_rates);
3320         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3321                     params->listen_interval);
3322
3323 #ifdef CONFIG_IEEE80211N
3324         if (params->ht_capabilities) {
3325                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3326                         params->ht_capabilities->length,
3327                         &params->ht_capabilities->data);
3328         }
3329 #endif /* CONFIG_IEEE80211N */
3330
3331         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3332         if (ret)
3333                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3334                            "result: %d (%s)", ret, strerror(-ret));
3335         if (ret == -EEXIST)
3336                 ret = 0;
3337  nla_put_failure:
3338         return ret;
3339 }
3340
3341
3342 static int i802_sta_remove(void *priv, const u8 *addr)
3343 {
3344         struct wpa_driver_nl80211_data *drv = priv;
3345         struct nl_msg *msg;
3346         int ret;
3347
3348         msg = nlmsg_alloc();
3349         if (!msg)
3350                 return -ENOMEM;
3351
3352         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3353                     0, NL80211_CMD_DEL_STATION, 0);
3354
3355         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3356                     if_nametoindex(drv->ifname));
3357         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3358
3359         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3360         if (ret == -ENOENT)
3361                 return 0;
3362         return ret;
3363  nla_put_failure:
3364         return -ENOBUFS;
3365 }
3366
3367
3368 static int i802_sta_set_flags(void *priv, const u8 *addr,
3369                               int total_flags, int flags_or, int flags_and)
3370 {
3371         struct wpa_driver_nl80211_data *drv = priv;
3372         struct nl_msg *msg, *flags = NULL;
3373
3374         msg = nlmsg_alloc();
3375         if (!msg)
3376                 return -ENOMEM;
3377
3378         flags = nlmsg_alloc();
3379         if (!flags) {
3380                 nlmsg_free(msg);
3381                 return -ENOMEM;
3382         }
3383
3384         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3385                     0, NL80211_CMD_SET_STATION, 0);
3386
3387         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3388                     if_nametoindex(drv->ifname));
3389         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3390
3391         if (total_flags & WLAN_STA_AUTHORIZED)
3392                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3393
3394         if (total_flags & WLAN_STA_WMM)
3395                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3396
3397         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3398                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3399
3400         if (total_flags & WLAN_STA_MFP)
3401                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3402
3403         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3404                 goto nla_put_failure;
3405
3406         nlmsg_free(flags);
3407
3408         return send_and_recv_msgs(drv, msg, NULL, NULL);
3409  nla_put_failure:
3410         nlmsg_free(flags);
3411         return -ENOBUFS;
3412 }
3413
3414
3415 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3416                                     int cw_min, int cw_max, int burst_time)
3417 {
3418         struct wpa_driver_nl80211_data *drv = priv;
3419         struct nl_msg *msg;
3420         struct nlattr *txq, *params;
3421
3422         msg = nlmsg_alloc();
3423         if (!msg)
3424                 return -1;
3425
3426         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3427                     0, NL80211_CMD_SET_WIPHY, 0);
3428
3429         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3430
3431         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3432         if (!txq)
3433                 goto nla_put_failure;
3434
3435         /* We are only sending parameters for a single TXQ at a time */
3436         params = nla_nest_start(msg, 1);
3437         if (!params)
3438                 goto nla_put_failure;
3439
3440         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3441         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3442          * 32 usec, so need to convert the value here. */
3443         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3444         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3445         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3446         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3447
3448         nla_nest_end(msg, params);
3449
3450         nla_nest_end(msg, txq);
3451
3452         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3453                 return 0;
3454  nla_put_failure:
3455         return -1;
3456 }
3457
3458
3459 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3460 {
3461         struct wpa_driver_nl80211_data *drv = priv;
3462         int ifidx;
3463         struct i802_bss *bss;
3464
3465         bss = os_zalloc(sizeof(*bss));
3466         if (bss == NULL)
3467                 return -1;
3468         os_strlcpy(bss->ifname, ifname, IFNAMSIZ);
3469
3470         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3471         if (ifidx < 0) {
3472                 os_free(bss);
3473                 return -1;
3474         }
3475         if (hostapd_set_iface_flags(priv, ifname, 1)) {
3476                 nl80211_remove_iface(priv, ifidx);
3477                 os_free(bss);
3478                 return -1;
3479         }
3480         bss->next = drv->bss.next;
3481         drv->bss.next = bss;
3482         return 0;
3483 }
3484
3485
3486 static int i802_bss_remove(void *priv, const char *ifname)
3487 {
3488         struct wpa_driver_nl80211_data *drv = priv;
3489         struct i802_bss *bss, *prev;
3490         nl80211_remove_iface(priv, if_nametoindex(ifname));
3491         prev = &drv->bss;
3492         bss = drv->bss.next;
3493         while (bss) {
3494                 if (os_strncmp(ifname, bss->ifname, IFNAMSIZ) == 0) {
3495                         prev->next = bss->next;
3496                         os_free(bss);
3497                         break;
3498                 }
3499                 prev = bss;
3500                 bss = bss->next;
3501         }
3502         return 0;
3503 }
3504
3505
3506 static int i802_set_beacon(const char *iface, void *priv,
3507                            const u8 *head, size_t head_len,
3508                            const u8 *tail, size_t tail_len, int dtim_period)
3509 {
3510         struct wpa_driver_nl80211_data *drv = priv;
3511         struct nl_msg *msg;
3512         u8 cmd = NL80211_CMD_NEW_BEACON;
3513         int ret;
3514         struct i802_bss *bss;
3515
3516         bss = get_bss(drv, iface);
3517         if (bss == NULL)
3518                 return -ENOENT;
3519
3520         msg = nlmsg_alloc();
3521         if (!msg)
3522                 return -ENOMEM;
3523
3524         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (iface=%s beacon_set=%d)",
3525                    iface, bss->beacon_set);
3526         if (bss->beacon_set)
3527                 cmd = NL80211_CMD_SET_BEACON;
3528
3529         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3530                     0, cmd, 0);
3531         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
3532         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
3533         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3534         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
3535         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
3536
3537         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3538         if (!ret)
3539                 bss->beacon_set = 1;
3540         return ret;
3541  nla_put_failure:
3542         return -ENOBUFS;
3543 }
3544
3545
3546 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3547 {
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,
3555                     0, NL80211_CMD_DEL_BEACON, 0);
3556         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3557
3558         return send_and_recv_msgs(drv, msg, NULL, NULL);
3559  nla_put_failure:
3560         return -ENOBUFS;
3561 }
3562
3563
3564 static int i802_set_beacon_int(void *priv, int value)
3565 {
3566         struct wpa_driver_nl80211_data *drv = priv;
3567         struct nl_msg *msg;
3568
3569         drv->beacon_int = value;
3570
3571         if (!drv->bss.beacon_set)
3572                 return 0;
3573
3574         msg = nlmsg_alloc();
3575         if (!msg)
3576                 return -ENOMEM;
3577
3578         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
3579                    "(beacon_set=%d)", value, drv->bss.beacon_set);
3580         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3581                     0, NL80211_CMD_SET_BEACON, 0);
3582         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3583
3584         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
3585
3586         return send_and_recv_msgs(drv, msg, NULL, NULL);
3587  nla_put_failure:
3588         return -ENOBUFS;
3589 }
3590
3591
3592 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3593 {
3594         struct wpa_driver_nl80211_data *drv = priv;
3595         struct nl_msg *msg;
3596
3597         msg = nlmsg_alloc();
3598         if (!msg)
3599                 return -ENOMEM;
3600
3601         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3602                     NL80211_CMD_SET_BSS, 0);
3603
3604         if (cts >= 0)
3605                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3606         if (preamble >= 0)
3607                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3608         if (slot >= 0)
3609                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3610
3611         /* TODO: multi-BSS support */
3612         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3613
3614         return send_and_recv_msgs(drv, msg, NULL, NULL);
3615  nla_put_failure:
3616         return -ENOBUFS;
3617 }
3618
3619
3620 static int i802_set_cts_protect(void *priv, int value)
3621 {
3622         return i802_set_bss(priv, value, -1, -1);
3623 }
3624
3625
3626 static int i802_set_preamble(void *priv, int value)
3627 {
3628         return i802_set_bss(priv, -1, value, -1);
3629 }
3630
3631
3632 static int i802_set_short_slot_time(void *priv, int value)
3633 {
3634         return i802_set_bss(priv, -1, -1, value);
3635 }
3636
3637
3638 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3639 {
3640         switch (type) {
3641         case HOSTAPD_IF_VLAN:
3642                 return NL80211_IFTYPE_AP_VLAN;
3643         case HOSTAPD_IF_WDS:
3644                 return NL80211_IFTYPE_WDS;
3645         }
3646         return -1;
3647 }
3648
3649
3650 static int i802_if_add(const char *iface, void *priv,
3651                        enum hostapd_driver_if_type type, char *ifname,
3652                        const u8 *addr)
3653 {
3654         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3655                 return -1;
3656         return 0;
3657 }
3658
3659
3660 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3661                           char *ifname, const u8 *addr)
3662 {
3663         /* unused at the moment */
3664         return -1;
3665 }
3666
3667
3668 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3669                           const char *ifname, const u8 *addr)
3670 {
3671         nl80211_remove_iface(priv, if_nametoindex(ifname));
3672         return 0;
3673 }
3674
3675
3676 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3677                              const char *ifname, int vlan_id)
3678 {
3679         struct wpa_driver_nl80211_data *drv = priv;
3680         struct nl_msg *msg;
3681
3682         msg = nlmsg_alloc();
3683         if (!msg)
3684                 return -ENOMEM;
3685
3686         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3687                     0, NL80211_CMD_SET_STATION, 0);
3688
3689         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3690                     if_nametoindex(drv->ifname));
3691         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3692         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3693                     if_nametoindex(ifname));
3694
3695         return send_and_recv_msgs(drv, msg, NULL, NULL);
3696  nla_put_failure:
3697         return -ENOBUFS;
3698 }
3699
3700
3701 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3702                          u8 *buf, size_t len,
3703                          struct hostapd_frame_info *hfi,
3704                          enum ieee80211_msg_type msg_type)
3705 {
3706         struct hostapd_iface *iface = drv->hapd->iface;
3707         struct ieee80211_hdr *hdr;
3708         u16 fc, type, stype;
3709         size_t data_len = len;
3710         struct hostapd_data *hapd = NULL;
3711         int broadcast_bssid = 0;
3712         size_t i;
3713         u8 *bssid;
3714
3715         /*
3716          * PS-Poll frames are 16 bytes. All other frames are
3717          * 24 bytes or longer.
3718          */
3719         if (len < 16)
3720                 return;
3721
3722         hdr = (struct ieee80211_hdr *) buf;
3723         fc = le_to_host16(hdr->frame_control);
3724
3725         type = WLAN_FC_GET_TYPE(fc);
3726         stype = WLAN_FC_GET_STYPE(fc);
3727
3728         switch (type) {
3729         case WLAN_FC_TYPE_DATA:
3730                 if (len < 24)
3731                         return;
3732                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
3733                 case WLAN_FC_TODS:
3734                         bssid = hdr->addr1;
3735                         break;
3736                 case WLAN_FC_FROMDS:
3737                         bssid = hdr->addr2;
3738                         break;
3739                 default:
3740                         /* discard */
3741                         return;
3742                 }
3743                 break;
3744         case WLAN_FC_TYPE_CTRL:
3745                 /* discard non-ps-poll frames */
3746                 if (stype != WLAN_FC_STYPE_PSPOLL)
3747                         return;
3748                 bssid = hdr->addr1;
3749                 break;
3750         case WLAN_FC_TYPE_MGMT:
3751                 bssid = hdr->addr3;
3752                 break;
3753         default:
3754                 /* discard */
3755                 return;
3756         }
3757
3758         /* find interface frame belongs to */
3759         for (i = 0; i < iface->num_bss; i++) {
3760                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
3761                         hapd = iface->bss[i];
3762                         break;
3763                 }
3764         }
3765
3766         if (hapd == NULL) {
3767                 hapd = iface->bss[0];
3768
3769                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
3770                     bssid[2] != 0xff || bssid[3] != 0xff ||
3771                     bssid[4] != 0xff || bssid[5] != 0xff) {
3772                         /*
3773                          * Unknown BSSID - drop frame if this is not from
3774                          * passive scanning or a beacon (at least ProbeReq
3775                          * frames to other APs may be allowed through RX
3776                          * filtering in the wlan hw/driver)
3777                          */
3778                         if ((type != WLAN_FC_TYPE_MGMT ||
3779                              stype != WLAN_FC_STYPE_BEACON))
3780                                 return;
3781                 } else
3782                         broadcast_bssid = 1;
3783         }
3784
3785         switch (msg_type) {
3786         case ieee80211_msg_normal:
3787                 /* continue processing */
3788                 break;
3789         case ieee80211_msg_tx_callback_ack:
3790                 handle_tx_callback(hapd, buf, data_len, 1);
3791                 return;
3792         case ieee80211_msg_tx_callback_fail:
3793                 handle_tx_callback(hapd, buf, data_len, 0);
3794                 return;
3795         }
3796
3797         switch (type) {
3798         case WLAN_FC_TYPE_MGMT:
3799                 if (stype != WLAN_FC_STYPE_BEACON &&
3800                     stype != WLAN_FC_STYPE_PROBE_REQ)
3801                         wpa_printf(MSG_MSGDUMP, "MGMT");
3802                 if (broadcast_bssid) {
3803                         for (i = 0; i < iface->num_bss; i++)
3804                                 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
3805                                                 stype, hfi);
3806                 } else
3807                         hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
3808                 break;
3809         case WLAN_FC_TYPE_CTRL:
3810                 /* can only get here with PS-Poll frames */
3811                 wpa_printf(MSG_DEBUG, "CTRL");
3812                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3813                 break;
3814         case WLAN_FC_TYPE_DATA:
3815                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3816                 break;
3817         }
3818 }
3819
3820
3821 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3822 {
3823         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3824         struct sockaddr_ll lladdr;
3825         unsigned char buf[3000];
3826         int len;
3827         socklen_t fromlen = sizeof(lladdr);
3828
3829         len = recvfrom(sock, buf, sizeof(buf), 0,
3830                        (struct sockaddr *)&lladdr, &fromlen);
3831         if (len < 0) {
3832                 perror("recv");
3833                 return;
3834         }
3835
3836         if (have_ifidx(drv, lladdr.sll_ifindex)) {
3837                 struct hostapd_data *hapd;
3838                 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3839                 if (!hapd)
3840                         return;
3841                 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3842         }
3843 }
3844
3845
3846 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
3847                             int mode)
3848 {
3849         struct nl_msg *msg;
3850         int ret = -ENOBUFS;
3851
3852         msg = nlmsg_alloc();
3853         if (!msg)
3854                 return -ENOMEM;
3855
3856         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3857                     0, NL80211_CMD_SET_INTERFACE, 0);
3858         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3859                     if_nametoindex(ifname));
3860         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3861
3862         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3863         if (!ret)
3864                 return 0;
3865  nla_put_failure:
3866         wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
3867                    "mode.", ifname);
3868         return ret;
3869 }
3870
3871
3872 #ifdef CONFIG_IEEE80211N
3873 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
3874                               int freq, u8 *ie, size_t ie_len)
3875 {
3876         struct ieee802_11_elems elems;
3877         int ht, pri_chan = 0, sec_chan = 0;
3878         struct ieee80211_ht_operation *oper;
3879         struct hostapd_neighbor_bss *nnei;
3880
3881         ieee802_11_parse_elems(ie, ie_len, &elems, 0);
3882         ht = elems.ht_capabilities || elems.ht_operation;
3883         if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
3884                 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
3885                 pri_chan = oper->control_chan;
3886                 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
3887                         if (oper->ht_param &
3888                             HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
3889                                 sec_chan = pri_chan + 4;
3890                         else if (oper->ht_param &
3891                             HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
3892                                 sec_chan = pri_chan - 4;
3893                 }
3894         }
3895
3896         wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
3897                    " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
3898                    MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
3899
3900         nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
3901                           sizeof(struct hostapd_neighbor_bss));
3902         if (nnei == NULL)
3903                 return;
3904         drv->neighbors = nnei;
3905         nnei = &nnei[drv->num_neighbors];
3906         os_memcpy(nnei->bssid, bssid, ETH_ALEN);
3907         nnei->freq = freq;
3908         nnei->ht = !!ht;
3909         nnei->pri_chan = pri_chan;
3910         nnei->sec_chan = sec_chan;
3911         drv->num_neighbors++;
3912 }
3913
3914
3915 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
3916 {
3917         int divi = 1000000, i;
3918
3919         if (iwe->u.freq.e == 0) {
3920                 /*
3921                  * Some drivers do not report frequency, but a channel.
3922                  * Try to map this to frequency by assuming they are using
3923                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
3924                  * frequency if the driver sends both frequency and channel,
3925                  * since the driver may be sending an A-band channel that we
3926                  * don't handle here.
3927                  */
3928
3929                 if (*freq)
3930                         return 0;
3931
3932                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
3933                         *freq = 2407 + 5 * iwe->u.freq.m;
3934                         return 0;
3935                 } else if (iwe->u.freq.m == 14) {
3936                         *freq = 2484;
3937                         return 0;
3938                 }
3939         }
3940
3941         if (iwe->u.freq.e > 6) {
3942                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
3943                            "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
3944                 return -1;
3945         }
3946
3947         for (i = 0; i < iwe->u.freq.e; i++)
3948                 divi /= 10;
3949         *freq = iwe->u.freq.m / divi;
3950         return 0;
3951 }
3952
3953
3954 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
3955                            size_t len)
3956 {
3957         size_t ap_num = 0;
3958         int first;
3959         struct iw_event iwe_buf, *iwe = &iwe_buf;
3960         char *pos, *end, *custom;
3961         u8 bssid[ETH_ALEN];
3962         int freq = 0;
3963         u8 *ie = NULL;
3964         size_t ie_len = 0;
3965
3966         ap_num = 0;
3967         first = 1;
3968
3969         pos = (char *) res_buf;
3970         end = (char *) res_buf + len;
3971
3972         while (pos + IW_EV_LCP_LEN <= end) {
3973                 /* Event data may be unaligned, so make a local, aligned copy
3974                  * before processing. */
3975                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
3976                 if (iwe->len <= IW_EV_LCP_LEN)
3977                         break;
3978
3979                 custom = pos + IW_EV_POINT_LEN;
3980                 if (iwe->cmd == IWEVGENIE) {
3981                         /* WE-19 removed the pointer from struct iw_point */
3982                         char *dpos = (char *) &iwe_buf.u.data.length;
3983                         int dlen = dpos - (char *) &iwe_buf;
3984                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
3985                                   sizeof(struct iw_event) - dlen);
3986                 } else {
3987                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
3988                         custom += IW_EV_POINT_OFF;
3989                 }
3990
3991                 switch (iwe->cmd) {
3992                 case SIOCGIWAP:
3993                         if (!first)
3994                                 i802_add_neighbor(drv, bssid, freq, ie,
3995                                                   ie_len);
3996                         first = 0;
3997                         os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
3998                         freq = 0;
3999                         ie = NULL;
4000                         ie_len = 0;
4001                         break;
4002                 case SIOCGIWFREQ:
4003                         i802_get_scan_freq(iwe, &freq);
4004                         break;
4005                 case IWEVGENIE:
4006                         if (custom + iwe->u.data.length > end) {
4007                                 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
4008                                 return -1;
4009                         }
4010                         ie = (u8 *) custom;
4011                         ie_len = iwe->u.data.length;
4012                         break;
4013                 }
4014
4015                 pos += iwe->len;
4016         }
4017
4018         if (!first)
4019                 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
4020
4021         return 0;
4022 }
4023
4024
4025 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
4026 {
4027         struct iwreq iwr;
4028         u8 *res_buf;
4029         size_t res_buf_len;
4030         int res;
4031
4032         res_buf_len = IW_SCAN_MAX_DATA;
4033         for (;;) {
4034                 res_buf = os_malloc(res_buf_len);
4035                 if (res_buf == NULL)
4036                         return -1;
4037                 os_memset(&iwr, 0, sizeof(iwr));
4038                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4039                 iwr.u.data.pointer = res_buf;
4040                 iwr.u.data.length = res_buf_len;
4041
4042                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
4043                         break;
4044
4045                 if (errno == E2BIG && res_buf_len < 65535) {
4046                         os_free(res_buf);
4047                         res_buf = NULL;
4048                         res_buf_len *= 2;
4049                         if (res_buf_len > 65535)
4050                                 res_buf_len = 65535; /* 16-bit length field */
4051                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
4052                                    "trying larger buffer (%lu bytes)",
4053                                    (unsigned long) res_buf_len);
4054                 } else {
4055                         perror("ioctl[SIOCGIWSCAN]");
4056                         os_free(res_buf);
4057                         return -1;
4058                 }
4059         }
4060
4061         if (iwr.u.data.length > res_buf_len) {
4062                 os_free(res_buf);
4063                 return -1;
4064         }
4065
4066         res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
4067         os_free(res_buf);
4068
4069         return res;
4070 }
4071
4072
4073 static int i802_is_event_wireless_scan_complete(char *data, int len)
4074 {
4075         struct iw_event iwe_buf, *iwe = &iwe_buf;
4076         char *pos, *end;
4077
4078         pos = data;
4079         end = data + len;
4080
4081         while (pos + IW_EV_LCP_LEN <= end) {
4082                 /* Event data may be unaligned, so make a local, aligned copy
4083                  * before processing. */
4084                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4085                 if (iwe->cmd == SIOCGIWSCAN)
4086                         return 1;
4087
4088                 pos += iwe->len;
4089         }
4090
4091         return 0;
4092 }
4093
4094
4095 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4096 {
4097         struct ifinfomsg *ifi;
4098         int attrlen, _nlmsg_len, rta_len;
4099         struct rtattr *attr;
4100
4101         if (len < (int) sizeof(*ifi))
4102                 return 0;
4103
4104         ifi = NLMSG_DATA(h);
4105
4106         if (ifindex != ifi->ifi_index)
4107                 return 0; /* event for foreign ifindex */
4108
4109         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4110
4111         attrlen = h->nlmsg_len - _nlmsg_len;
4112         if (attrlen < 0)
4113                 return 0;
4114
4115         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4116
4117         rta_len = RTA_ALIGN(sizeof(struct rtattr));
4118         while (RTA_OK(attr, attrlen)) {
4119                 if (attr->rta_type == IFLA_WIRELESS &&
4120                     i802_is_event_wireless_scan_complete(
4121                             ((char *) attr) + rta_len,
4122                             attr->rta_len - rta_len))
4123                         return 1;
4124                 attr = RTA_NEXT(attr, attrlen);
4125         }
4126
4127         return 0;
4128 }
4129
4130
4131 static int i802_is_scan_complete(int s, int ifindex)
4132 {
4133         char buf[1024];
4134         int left;
4135         struct nlmsghdr *h;
4136
4137         left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4138         if (left < 0) {
4139                 perror("recv(netlink)");
4140                 return 0;
4141         }
4142
4143         h = (struct nlmsghdr *) buf;
4144         while (left >= (int) sizeof(*h)) {
4145                 int len, plen;
4146
4147                 len = h->nlmsg_len;
4148                 plen = len - sizeof(*h);
4149                 if (len > left || plen < 0) {
4150                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4151                                    "len=%d left=%d plen=%d",
4152                                    len, left, plen);
4153                         break;
4154                 }
4155
4156                 switch (h->nlmsg_type) {
4157                 case RTM_NEWLINK:
4158                         if (i802_is_rtm_scan_complete(ifindex, h, plen))
4159                                 return 1;
4160                         break;
4161                 }
4162
4163                 len = NLMSG_ALIGN(len);
4164                 left -= len;
4165                 h = (struct nlmsghdr *) ((char *) h + len);
4166         }
4167
4168         return 0;
4169 }
4170
4171
4172 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4173 {
4174         struct iwreq iwr;
4175         int s, res, ifindex;
4176         struct sockaddr_nl local;
4177         time_t now, end;
4178         fd_set rfds;
4179         struct timeval tv;
4180
4181         wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4182                    "starting HT 20/40 MHz BSS");
4183
4184         /* Request a new scan */
4185         /* TODO: would be enough to scan the selected band */
4186         os_memset(&iwr, 0, sizeof(iwr));
4187         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4188         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4189                 perror("ioctl[SIOCSIWSCAN]");
4190                 return -1;
4191         }
4192
4193         ifindex = if_nametoindex(drv->ifname);
4194
4195         /* Wait for scan completion event or timeout */
4196         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4197         if (s < 0) {
4198                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4199                 return -1;
4200         }
4201
4202         os_memset(&local, 0, sizeof(local));
4203         local.nl_family = AF_NETLINK;
4204         local.nl_groups = RTMGRP_LINK;
4205         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
4206                 perror("bind(netlink)");
4207                 close(s);
4208                 return -1;
4209         }
4210
4211         time(&end);
4212         end += 30; /* Wait at most 30 seconds for scan results */
4213         for (;;) {
4214                 time(&now);
4215                 tv.tv_sec = end > now ? end - now : 0;
4216                 tv.tv_usec = 0;
4217                 FD_ZERO(&rfds);
4218                 FD_SET(s, &rfds);
4219                 res = select(s + 1, &rfds, NULL, NULL, &tv);
4220                 if (res < 0) {
4221                         perror("select");
4222                         /* Assume results are ready after 10 seconds wait */
4223                         os_sleep(10, 0);
4224                         break;
4225                 } else if (res) {
4226                         if (i802_is_scan_complete(s, ifindex)) {
4227                                 wpa_printf(MSG_DEBUG, "nl80211: Scan "
4228                                            "completed");
4229                                 break;
4230                         }
4231                 } else {
4232                         wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
4233                         /* Assume results are ready to be read now */
4234                         break;
4235                 }
4236         }
4237
4238         close(s);
4239
4240         return i802_get_ht_scan_res(drv);
4241 }
4242 #endif /* CONFIG_IEEE80211N */
4243
4244
4245 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
4246 {
4247         struct ifreq ifr;
4248         int ret;
4249
4250         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
4251         if (drv->ioctl_sock < 0) {
4252                 perror("socket[PF_INET,SOCK_DGRAM]");
4253                 return -1;
4254         }
4255
4256         /* start listening for EAPOL on the default AP interface */
4257         add_ifidx(drv, if_nametoindex(drv->ifname));
4258
4259         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4260                 return -1;
4261
4262         if (bssid) {
4263                 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
4264                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
4265                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
4266
4267                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
4268                         perror("ioctl(SIOCSIFHWADDR)");
4269                         return -1;
4270                 }
4271         }
4272
4273         /*
4274          * initialise generic netlink and nl80211
4275          */
4276         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
4277         if (!drv->nl_cb) {
4278                 printf("Failed to allocate netlink callbacks.\n");
4279                 return -1;
4280         }
4281
4282         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
4283         if (!drv->nl_handle) {
4284                 printf("Failed to allocate netlink handle.\n");
4285                 return -1;
4286         }
4287
4288         if (genl_connect(drv->nl_handle)) {
4289                 printf("Failed to connect to generic netlink.\n");
4290                 return -1;
4291         }
4292
4293 #ifdef CONFIG_LIBNL20
4294         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
4295                 printf("Failed to allocate generic netlink cache.\n");
4296                 return -1;
4297         }
4298 #else /* CONFIG_LIBNL20 */
4299         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
4300         if (!drv->nl_cache) {
4301                 printf("Failed to allocate generic netlink cache.\n");
4302                 return -1;
4303         }
4304 #endif /* CONFIG_LIBNL20 */
4305
4306         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
4307         if (!drv->nl80211) {
4308                 printf("nl80211 not found.\n");
4309                 return -1;
4310         }
4311
4312         ret = nl_get_multicast_id(drv, "nl80211", "scan");
4313         if (ret >= 0)
4314                 ret = nl_socket_add_membership(drv->nl_handle, ret);
4315         if (ret < 0) {
4316                 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4317                            "membership for scan events: %d (%s)",
4318                            ret, strerror(-ret));
4319         }
4320
4321         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
4322         if (ret >= 0)
4323                 ret = nl_socket_add_membership(drv->nl_handle, ret);
4324         if (ret < 0) {
4325                 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4326                            "membership for mlme events: %d (%s)",
4327                            ret, strerror(-ret));
4328         }
4329
4330         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
4331                                  wpa_driver_nl80211_event_receive, drv,
4332                                  drv->hapd);
4333
4334 #ifdef CONFIG_IEEE80211N
4335         if (drv->ht_40mhz_scan) {
4336                 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
4337                     || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
4338                     i802_ht_scan(drv) ||
4339                     hostapd_set_iface_flags(drv, drv->ifname, 0)) {
4340                         wpa_printf(MSG_ERROR, "Failed to scan channels for "
4341                                    "HT 40 MHz operations");
4342                         return -1;
4343                 }
4344         }
4345 #endif /* CONFIG_IEEE80211N */
4346
4347         /* Initialise a monitor interface */
4348         if (nl80211_create_monitor_interface(drv))
4349                 return -1;
4350
4351         if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
4352                 goto fail1;
4353
4354         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4355                 goto fail1;
4356
4357         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4358         if (drv->eapol_sock < 0) {
4359                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4360                 goto fail1;
4361         }
4362
4363         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4364         {
4365                 printf("Could not register read socket for eapol\n");
4366                 return -1;
4367         }
4368
4369         memset(&ifr, 0, sizeof(ifr));
4370         os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
4371         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
4372                 perror("ioctl(SIOCGIFHWADDR)");
4373                 goto fail1;
4374         }
4375
4376         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
4377                 printf("Invalid HW-addr family 0x%04x\n",
4378                        ifr.ifr_hwaddr.sa_family);
4379                 goto fail1;
4380         }
4381         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
4382
4383         return 0;
4384
4385 fail1:
4386         nl80211_remove_iface(drv, drv->monitor_ifidx);
4387         return -1;
4388 }
4389
4390
4391 static int i802_get_inact_sec(void *priv, const u8 *addr)
4392 {
4393         struct hostap_sta_driver_data data;
4394         int ret;
4395
4396         data.inactive_msec = (unsigned long) -1;
4397         ret = i802_read_sta_data(priv, &data, addr);
4398         if (ret || data.inactive_msec == (unsigned long) -1)
4399                 return -1;
4400         return data.inactive_msec / 1000;
4401 }
4402
4403
4404 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4405 {
4406 #if 0
4407         /* TODO */
4408 #endif
4409         return 0;
4410 }
4411
4412
4413 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
4414 {
4415         struct wpa_driver_nl80211_data *drv = priv;
4416         struct ieee80211_mgmt mgmt;
4417
4418         memset(&mgmt, 0, sizeof(mgmt));
4419         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4420                                           WLAN_FC_STYPE_DEAUTH);
4421         memcpy(mgmt.da, addr, ETH_ALEN);
4422         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4423         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4424         mgmt.u.deauth.reason_code = host_to_le16(reason);
4425         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4426                                             IEEE80211_HDRLEN +
4427                                             sizeof(mgmt.u.deauth));
4428 }
4429
4430
4431 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
4432 {
4433         struct wpa_driver_nl80211_data *drv = priv;
4434         struct ieee80211_mgmt mgmt;
4435
4436         memset(&mgmt, 0, sizeof(mgmt));
4437         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4438                                           WLAN_FC_STYPE_DISASSOC);
4439         memcpy(mgmt.da, addr, ETH_ALEN);
4440         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4441         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4442         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4443         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4444                                             IEEE80211_HDRLEN +
4445                                             sizeof(mgmt.u.disassoc));
4446 }
4447
4448
4449 static const struct hostapd_neighbor_bss *
4450 i802_get_neighbor_bss(void *priv, size_t *num)
4451 {
4452         struct wpa_driver_nl80211_data *drv = priv;
4453         *num = drv->num_neighbors;
4454         return drv->neighbors;
4455 }
4456
4457
4458 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
4459 {
4460         struct wpa_driver_nl80211_data *drv;
4461         size_t i;
4462
4463         drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
4464         if (drv == NULL) {
4465                 printf("Could not allocate memory for i802 driver data\n");
4466                 return NULL;
4467         }
4468
4469         drv->hapd = hapd;
4470         memcpy(drv->ifname, hapd->conf->iface, sizeof(drv->ifname));
4471         memcpy(drv->bss.ifname, hapd->conf->iface, sizeof(drv->bss.ifname));
4472         drv->ifindex = if_nametoindex(drv->ifname);
4473
4474         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4475         drv->if_indices = drv->default_if_indices;
4476         for (i = 0; i < hapd->iface->num_bss; i++) {
4477                 struct hostapd_data *bss = hapd->iface->bss[i];
4478                 if (bss->conf->bridge)
4479                         add_ifidx(drv, if_nametoindex(bss->conf->bridge));
4480         }
4481         drv->ht_40mhz_scan = hapd->iconf->secondary_channel != 0;
4482
4483         if (i802_init_sockets(drv, bssid))
4484                 goto failed;
4485
4486         return drv;
4487
4488 failed:
4489         free(drv);
4490         return NULL;
4491 }
4492
4493
4494 static void *i802_init(struct hostapd_data *hapd)
4495 {
4496         return i802_init_bssid(hapd, NULL);
4497 }
4498
4499
4500 static void i802_deinit(void *priv)
4501 {
4502         struct wpa_driver_nl80211_data *drv = priv;
4503         struct i802_bss *bss, *prev;
4504
4505         if (drv->last_freq_ht) {
4506                 /* Clear HT flags from the driver */
4507                 struct hostapd_freq_params freq;
4508                 os_memset(&freq, 0, sizeof(freq));
4509                 freq.freq = drv->last_freq;
4510                 i802_set_freq(priv, &freq);
4511         }
4512
4513         i802_del_beacon(drv);
4514
4515         /* remove monitor interface */
4516         nl80211_remove_iface(drv, drv->monitor_ifidx);
4517
4518         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
4519
4520         if (drv->monitor_sock >= 0) {
4521                 eloop_unregister_read_sock(drv->monitor_sock);
4522                 close(drv->monitor_sock);
4523         }
4524         if (drv->ioctl_sock >= 0)
4525                 close(drv->ioctl_sock);
4526         if (drv->eapol_sock >= 0) {
4527                 eloop_unregister_read_sock(drv->eapol_sock);
4528                 close(drv->eapol_sock);
4529         }
4530
4531         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
4532         genl_family_put(drv->nl80211);
4533         nl_cache_free(drv->nl_cache);
4534         nl_handle_destroy(drv->nl_handle);
4535         nl_cb_put(drv->nl_cb);
4536
4537         if (drv->if_indices != drv->default_if_indices)
4538                 free(drv->if_indices);
4539
4540         os_free(drv->neighbors);
4541
4542         bss = drv->bss.next;
4543         while (bss) {
4544                 prev = bss;
4545                 bss = bss->next;
4546                 os_free(bss);
4547         }
4548
4549         free(drv);
4550 }
4551
4552 #endif /* HOSTAPD */
4553
4554
4555 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4556         .name = "nl80211",
4557         .desc = "Linux nl80211/cfg80211",
4558         .get_bssid = wpa_driver_nl80211_get_bssid,
4559         .get_ssid = wpa_driver_nl80211_get_ssid,
4560         .set_key = wpa_driver_nl80211_set_key,
4561         .scan2 = wpa_driver_nl80211_scan,
4562         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4563         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4564         .disassociate = wpa_driver_nl80211_disassociate,
4565         .authenticate = wpa_driver_nl80211_authenticate,
4566         .associate = wpa_driver_nl80211_associate,
4567         .init = wpa_driver_nl80211_init,
4568         .deinit = wpa_driver_nl80211_deinit,
4569         .get_capa = wpa_driver_nl80211_get_capa,
4570         .set_operstate = wpa_driver_nl80211_set_operstate,
4571         .set_country = wpa_driver_nl80211_set_country,
4572 #ifdef CONFIG_AP
4573         .set_beacon = wpa_driver_nl80211_set_beacon,
4574         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4575         .send_mlme = wpa_driver_nl80211_send_mlme,
4576 #endif /* CONFIG_AP */
4577 #if defined(CONFIG_AP) || defined(HOSTAPD)
4578         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4579 #endif /* CONFIG_AP || HOSTAPD */
4580 #ifdef HOSTAPD
4581         .hapd_init = i802_init,
4582         .init_bssid = i802_init_bssid,
4583         .hapd_deinit = i802_deinit,
4584         .hapd_set_key = i802_set_key,
4585         .get_seqnum = i802_get_seqnum,
4586         .flush = i802_flush,
4587         .read_sta_data = i802_read_sta_data,
4588         .hapd_send_eapol = i802_send_eapol,
4589         .sta_set_flags = i802_sta_set_flags,
4590         .sta_deauth = i802_sta_deauth,
4591         .sta_disassoc = i802_sta_disassoc,
4592         .sta_remove = i802_sta_remove,
4593         .sta_add = i802_sta_add,
4594         .get_inact_sec = i802_get_inact_sec,
4595         .sta_clear_stats = i802_sta_clear_stats,
4596         .set_freq = i802_set_freq,
4597         .set_rts = i802_set_rts,
4598         .set_frag = i802_set_frag,
4599         .set_retry = i802_set_retry,
4600         .set_rate_sets = i802_set_rate_sets,
4601         .hapd_set_beacon = i802_set_beacon,
4602         .hapd_set_beacon_int = i802_set_beacon_int,
4603         .set_cts_protect = i802_set_cts_protect,
4604         .set_preamble = i802_set_preamble,
4605         .set_short_slot_time = i802_set_short_slot_time,
4606         .set_tx_queue_params = i802_set_tx_queue_params,
4607         .bss_add = i802_bss_add,
4608         .bss_remove = i802_bss_remove,
4609         .if_add = i802_if_add,
4610         .if_update = i802_if_update,
4611         .if_remove = i802_if_remove,
4612         .set_sta_vlan = i802_set_sta_vlan,
4613         .get_neighbor_bss = i802_get_neighbor_bss,
4614 #endif /* HOSTAPD */
4615 };