vcs.maemo.org Git - wpasupplicant/blob - src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if_arp.h>
  22 #include <netlink/genl/genl.h>
  23 #include <netlink/genl/family.h>
  24 #include <netlink/genl/ctrl.h>
  25 #include "nl80211_copy.h"
  26 #include "wireless_copy.h"
  27
  28 #include "common.h"
  29 #include "driver.h"
  30 #include "eloop.h"
  31 #include "ieee802_11_defs.h"
  32
  33 #if defined(CONFIG_AP) || defined(HOSTAPD)
  34 #include <netpacket/packet.h>
  35 #include <linux/filter.h>
  36 #include "radiotap.h"
  37 #include "radiotap_iter.h"
  38 #endif /* CONFIG_AP || HOSTAPD */
  39
  40 #ifdef CONFIG_AP
  41
  42 #include "../hostapd/hostapd_defs.h"
  43
  44 #ifndef ETH_P_ALL
  45 #define ETH_P_ALL 0x0003
  46 #endif
  47
  48 #endif /* CONFIG_AP */
  49
  50 #ifdef HOSTAPD
  51 #include <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/sta_flags.h"
  58 #include "ieee802_11_common.h"
  59
  60 #ifdef CONFIG_LIBNL20
  61 /* libnl 2.0 compatibility code */
  62 #define nl_handle_alloc_cb nl_socket_alloc_cb
  63 #define nl_handle_destroy nl_socket_free
  64 #endif /* CONFIG_LIBNL20 */
  65
  66 #endif /* HOSTAPD */
  67
  68
  69 #ifndef IFF_LOWER_UP
  70 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  71 #endif
  72 #ifndef IFF_DORMANT
  73 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  74 #endif
  75
  76 #ifndef IF_OPER_DORMANT
  77 #define IF_OPER_DORMANT 5
  78 #endif
  79 #ifndef IF_OPER_UP
  80 #define IF_OPER_UP 6
  81 #endif
  82
  83 enum ieee80211_msg_type {
  84         ieee80211_msg_normal = 0,
  85         ieee80211_msg_tx_callback_ack = 1,
  86         ieee80211_msg_tx_callback_fail = 2,
  87 };
  88
  89 struct i802_bss {
  90         struct i802_bss *next;
  91         int ifindex;
  92         unsigned int beacon_set:1;
  93 };
  94
  95 struct wpa_driver_nl80211_data {
  96         void *ctx;
  97         int link_event_sock;
  98         int ioctl_sock; /* socket for ioctl() use */
  99         char ifname[IFNAMSIZ + 1];
 100         int ifindex;
 101         int if_removed;
 102         struct wpa_driver_capa capa;
 103         int has_capability;
 104
 105         int operstate;
 106
 107         int scan_complete_events;
 108
 109         struct nl_handle *nl_handle;
 110         struct nl_cache *nl_cache;
 111         struct nl_cb *nl_cb;
 112         struct genl_family *nl80211;
 113
 114         u8 bssid[ETH_ALEN];
 115         int associated;
 116         u8 ssid[32];
 117         size_t ssid_len;
 118
 119 #ifdef CONFIG_AP
 120         int beacon_int;
 121         unsigned int beacon_set:1;
 122         int monitor_sock;
 123         int monitor_ifidx;
 124 #endif /* CONFIG_AP */
 125
 126 #ifdef HOSTAPD
 127         struct hostapd_data *hapd;
 128
 129         int eapol_sock; /* socket for EAPOL frames */
 130         int monitor_sock; /* socket for monitor */
 131         int monitor_ifidx;
 132
 133         int default_if_indices[16];
 134         int *if_indices;
 135         int num_if_indices;
 136
 137         int beacon_int;
 138         struct i802_bss bss;
 139         unsigned int ht_40mhz_scan:1;
 140
 141         int last_freq;
 142         int last_freq_ht;
 143         struct hostapd_neighbor_bss *neighbors;
 144         size_t num_neighbors;
 145 #endif /* HOSTAPD */
 146 };
 147
 148
 149 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 150                                             void *timeout_ctx);
 151 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
 152                                        int mode);
 153 static int
 154 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 155
 156 #ifdef CONFIG_AP
 157 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 158                                  int ifidx);
 159 #endif /* CONFIG_AP */
 160
 161 #ifdef HOSTAPD
 162 static void handle_frame(struct wpa_driver_nl80211_data *drv,
 163                          u8 *buf, size_t len,
 164                          struct hostapd_frame_info *hfi,
 165                          enum ieee80211_msg_type msg_type);
 166 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 167 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 168 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 169                                  int ifindex);
 170 #endif /* HOSTAPD */
 171
 172
 173 /* nl80211 code */
 174 static int ack_handler(struct nl_msg *msg, void *arg)
 175 {
 176         int *err = arg;
 177         *err = 0;
 178         return NL_STOP;
 179 }
 180
 181 static int finish_handler(struct nl_msg *msg, void *arg)
 182 {
 183         int *ret = arg;
 184         *ret = 0;
 185         return NL_SKIP;
 186 }
 187
 188 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 189                          void *arg)
 190 {
 191         int *ret = arg;
 192         *ret = err->error;
 193         return NL_SKIP;
 194 }
 195
 196
 197 static int no_seq_check(struct nl_msg *msg, void *arg)
 198 {
 199         return NL_OK;
 200 }
 201
 202
 203 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 204                               struct nl_msg *msg,
 205                               int (*valid_handler)(struct nl_msg *, void *),
 206                               void *valid_data)
 207 {
 208         struct nl_cb *cb;
 209         int err = -ENOMEM;
 210
 211         cb = nl_cb_clone(drv->nl_cb);
 212         if (!cb)
 213                 goto out;
 214
 215         err = nl_send_auto_complete(drv->nl_handle, msg);
 216         if (err < 0)
 217                 goto out;
 218
 219         err = 1;
 220
 221         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 222         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 223         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 224
 225         if (valid_handler)
 226                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 227                           valid_handler, valid_data);
 228
 229         while (err > 0)
 230                 nl_recvmsgs(drv->nl_handle, cb);
 231  out:
 232         nl_cb_put(cb);
 233         nlmsg_free(msg);
 234         return err;
 235 }
 236
 237
 238 struct family_data {
 239         const char *group;
 240         int id;
 241 };
 242
 243
 244 static int family_handler(struct nl_msg *msg, void *arg)
 245 {
 246         struct family_data *res = arg;
 247         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 248         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 249         struct nlattr *mcgrp;
 250         int i;
 251
 252         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 253                   genlmsg_attrlen(gnlh, 0), NULL);
 254         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 255                 return NL_SKIP;
 256
 257         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 258                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 259                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 260                           nla_len(mcgrp), NULL);
 261                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 262                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 263                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 264                                res->group,
 265                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 266                         continue;
 267                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 268                 break;
 269         };
 270
 271         return NL_SKIP;
 272 }
 273
 274
 275 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 276                                const char *family, const char *group)
 277 {
 278         struct nl_msg *msg;
 279         int ret = -1;
 280         struct family_data res = { group, -ENOENT };
 281
 282         msg = nlmsg_alloc();
 283         if (!msg)
 284                 return -ENOMEM;
 285         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 286                     0, 0, CTRL_CMD_GETFAMILY, 0);
 287         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 288
 289         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 290         msg = NULL;
 291         if (ret == 0)
 292                 ret = res.id;
 293
 294 nla_put_failure:
 295         nlmsg_free(msg);
 296         return ret;
 297 }
 298
 299
 300 static int wpa_driver_nl80211_send_oper_ifla(
 301         struct wpa_driver_nl80211_data *drv,
 302         int linkmode, int operstate)
 303 {
 304         struct {
 305                 struct nlmsghdr hdr;
 306                 struct ifinfomsg ifinfo;
 307                 char opts[16];
 308         } req;
 309         struct rtattr *rta;
 310         static int nl_seq;
 311         ssize_t ret;
 312
 313         os_memset(&req, 0, sizeof(req));
 314
 315         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 316         req.hdr.nlmsg_type = RTM_SETLINK;
 317         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 318         req.hdr.nlmsg_seq = ++nl_seq;
 319         req.hdr.nlmsg_pid = 0;
 320
 321         req.ifinfo.ifi_family = AF_UNSPEC;
 322         req.ifinfo.ifi_type = 0;
 323         req.ifinfo.ifi_index = drv->ifindex;
 324         req.ifinfo.ifi_flags = 0;
 325         req.ifinfo.ifi_change = 0;
 326
 327         if (linkmode != -1) {
 328                 rta = (struct rtattr *)
 329                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 330                 rta->rta_type = IFLA_LINKMODE;
 331                 rta->rta_len = RTA_LENGTH(sizeof(char));
 332                 *((char *) RTA_DATA(rta)) = linkmode;
 333                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 334                         RTA_LENGTH(sizeof(char));
 335         }
 336         if (operstate != -1) {
 337                 rta = (struct rtattr *)
 338                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 339                 rta->rta_type = IFLA_OPERSTATE;
 340                 rta->rta_len = RTA_LENGTH(sizeof(char));
 341                 *((char *) RTA_DATA(rta)) = operstate;
 342                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 343                         RTA_LENGTH(sizeof(char));
 344         }
 345
 346         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 347                    linkmode, operstate);
 348
 349         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 350         if (ret < 0) {
 351                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 352                            "%s (assume operstate is not supported)",
 353                            strerror(errno));
 354         }
 355
 356         return ret < 0 ? -1 : 0;
 357 }
 358
 359
 360 static int wpa_driver_nl80211_set_auth_param(
 361         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 362 {
 363         struct iwreq iwr;
 364         int ret = 0;
 365
 366         os_memset(&iwr, 0, sizeof(iwr));
 367         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 368         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 369         iwr.u.param.value = value;
 370
 371         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 372                 if (errno != EOPNOTSUPP) {
 373                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 374                                    "value 0x%x) failed: %s)",
 375                                    idx, value, strerror(errno));
 376                 }
 377                 ret = errno == EOPNOTSUPP ? -2 : -1;
 378         }
 379
 380         return ret;
 381 }
 382
 383
 384 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 385 {
 386         struct wpa_driver_nl80211_data *drv = priv;
 387         if (!drv->associated)
 388                 return -1;
 389         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 390         return 0;
 391 }
 392
 393
 394 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 395 {
 396         struct wpa_driver_nl80211_data *drv = priv;
 397         if (!drv->associated)
 398                 return -1;
 399         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 400         return drv->ssid_len;
 401 }
 402
 403
 404 #ifndef HOSTAPD
 405 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 406                                           void *ctx, char *buf, size_t len,
 407                                           int del)
 408 {
 409         union wpa_event_data event;
 410
 411         os_memset(&event, 0, sizeof(event));
 412         if (len > sizeof(event.interface_status.ifname))
 413                 len = sizeof(event.interface_status.ifname) - 1;
 414         os_memcpy(event.interface_status.ifname, buf, len);
 415         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 416                 EVENT_INTERFACE_ADDED;
 417
 418         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 419                    del ? "DEL" : "NEW",
 420                    event.interface_status.ifname,
 421                    del ? "removed" : "added");
 422
 423         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 424                 if (del)
 425                         drv->if_removed = 1;
 426                 else
 427                         drv->if_removed = 0;
 428         }
 429
 430         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 431 }
 432
 433
 434 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 435                                          struct nlmsghdr *h)
 436 {
 437         struct ifinfomsg *ifi;
 438         int attrlen, _nlmsg_len, rta_len;
 439         struct rtattr *attr;
 440
 441         ifi = NLMSG_DATA(h);
 442
 443         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 444
 445         attrlen = h->nlmsg_len - _nlmsg_len;
 446         if (attrlen < 0)
 447                 return 0;
 448
 449         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 450
 451         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 452         while (RTA_OK(attr, attrlen)) {
 453                 if (attr->rta_type == IFLA_IFNAME) {
 454                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 455                             == 0)
 456                                 return 1;
 457                         else
 458                                 break;
 459                 }
 460                 attr = RTA_NEXT(attr, attrlen);
 461         }
 462
 463         return 0;
 464 }
 465
 466
 467 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 468                                           int ifindex, struct nlmsghdr *h)
 469 {
 470         if (drv->ifindex == ifindex)
 471                 return 1;
 472
 473         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 474                 drv->ifindex = if_nametoindex(drv->ifname);
 475                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 476                            "interface");
 477                 wpa_driver_nl80211_finish_drv_init(drv);
 478                 return 1;
 479         }
 480
 481         return 0;
 482 }
 483
 484
 485 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 486                                               void *ctx, struct nlmsghdr *h,
 487                                               size_t len)
 488 {
 489         struct ifinfomsg *ifi;
 490         int attrlen, _nlmsg_len, rta_len;
 491         struct rtattr * attr;
 492
 493         if (len < sizeof(*ifi))
 494                 return;
 495
 496         ifi = NLMSG_DATA(h);
 497
 498         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 499                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 500                            ifi->ifi_index);
 501                 return;
 502         }
 503
 504         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 505                    "(%s%s%s%s)",
 506                    drv->operstate, ifi->ifi_flags,
 507                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 508                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 509                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 510                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 511         /*
 512          * Some drivers send the association event before the operup event--in
 513          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 514          * fails. This will hit us when wpa_supplicant does not need to do
 515          * IEEE 802.1X authentication
 516          */
 517         if (drv->operstate == 1 &&
 518             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 519             !(ifi->ifi_flags & IFF_RUNNING))
 520                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 521
 522         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 523
 524         attrlen = h->nlmsg_len - _nlmsg_len;
 525         if (attrlen < 0)
 526                 return;
 527
 528         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 529
 530         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 531         while (RTA_OK(attr, attrlen)) {
 532                 if (attr->rta_type == IFLA_IFNAME) {
 533                         wpa_driver_nl80211_event_link(
 534                                 drv, ctx,
 535                                 ((char *) attr) + rta_len,
 536                                 attr->rta_len - rta_len, 0);
 537                 }
 538                 attr = RTA_NEXT(attr, attrlen);
 539         }
 540 }
 541
 542
 543 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 544                                               void *ctx, struct nlmsghdr *h,
 545                                               size_t len)
 546 {
 547         struct ifinfomsg *ifi;
 548         int attrlen, _nlmsg_len, rta_len;
 549         struct rtattr * attr;
 550
 551         if (len < sizeof(*ifi))
 552                 return;
 553
 554         ifi = NLMSG_DATA(h);
 555
 556         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 557
 558         attrlen = h->nlmsg_len - _nlmsg_len;
 559         if (attrlen < 0)
 560                 return;
 561
 562         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 563
 564         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 565         while (RTA_OK(attr, attrlen)) {
 566                 if (attr->rta_type == IFLA_IFNAME) {
 567                         wpa_driver_nl80211_event_link(
 568                                 drv, ctx,
 569                                 ((char *) attr) + rta_len,
 570                                 attr->rta_len - rta_len, 1);
 571                 }
 572                 attr = RTA_NEXT(attr, attrlen);
 573         }
 574 }
 575
 576
 577 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 578                                                   void *sock_ctx)
 579 {
 580         char buf[8192];
 581         int left;
 582         struct sockaddr_nl from;
 583         socklen_t fromlen;
 584         struct nlmsghdr *h;
 585         int max_events = 10;
 586
 587 try_again:
 588         fromlen = sizeof(from);
 589         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 590                         (struct sockaddr *) &from, &fromlen);
 591         if (left < 0) {
 592                 if (errno != EINTR && errno != EAGAIN)
 593                         perror("recvfrom(netlink)");
 594                 return;
 595         }
 596
 597         h = (struct nlmsghdr *) buf;
 598         while (left >= (int) sizeof(*h)) {
 599                 int len, plen;
 600
 601                 len = h->nlmsg_len;
 602                 plen = len - sizeof(*h);
 603                 if (len > left || plen < 0) {
 604                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 605                                    "len=%d left=%d plen=%d",
 606                                    len, left, plen);
 607                         break;
 608                 }
 609
 610                 switch (h->nlmsg_type) {
 611                 case RTM_NEWLINK:
 612                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 613                                                           h, plen);
 614                         break;
 615                 case RTM_DELLINK:
 616                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 617                                                           h, plen);
 618                         break;
 619                 }
 620
 621                 len = NLMSG_ALIGN(len);
 622                 left -= len;
 623                 h = (struct nlmsghdr *) ((char *) h + len);
 624         }
 625
 626         if (left > 0) {
 627                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 628                            "message", left);
 629         }
 630
 631         if (--max_events > 0) {
 632                 /*
 633                  * Try to receive all events in one eloop call in order to
 634                  * limit race condition on cases where AssocInfo event, Assoc
 635                  * event, and EAPOL frames are received more or less at the
 636                  * same time. We want to process the event messages first
 637                  * before starting EAPOL processing.
 638                  */
 639                 goto try_again;
 640         }
 641 }
 642
 643
 644 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 645                             const u8 *frame, size_t len)
 646 {
 647         const struct ieee80211_mgmt *mgmt;
 648         union wpa_event_data event;
 649
 650         mgmt = (const struct ieee80211_mgmt *) frame;
 651         if (len < 24 + sizeof(mgmt->u.auth)) {
 652                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 653                            "frame");
 654                 return;
 655         }
 656
 657         os_memset(&event, 0, sizeof(event));
 658         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 659         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 660         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 661         if (len > 24 + sizeof(mgmt->u.auth)) {
 662                 event.auth.ies = mgmt->u.auth.variable;
 663                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 664         }
 665
 666         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 667 }
 668
 669
 670 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 671                             const u8 *frame, size_t len)
 672 {
 673         const struct ieee80211_mgmt *mgmt;
 674         union wpa_event_data event;
 675         u16 status;
 676
 677         mgmt = (const struct ieee80211_mgmt *) frame;
 678         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 679                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 680                            "frame");
 681                 return;
 682         }
 683
 684         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 685         if (status != WLAN_STATUS_SUCCESS) {
 686                 os_memset(&event, 0, sizeof(event));
 687                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 688                         event.assoc_reject.resp_ies =
 689                                 (u8 *) mgmt->u.assoc_resp.variable;
 690                         event.assoc_reject.resp_ies_len =
 691                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 692                 }
 693                 event.assoc_reject.status_code = status;
 694
 695                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 696                 return;
 697         }
 698
 699         drv->associated = 1;
 700         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 701
 702         os_memset(&event, 0, sizeof(event));
 703         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 704                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 705                 event.assoc_info.resp_ies_len =
 706                         len - 24 - sizeof(mgmt->u.assoc_resp);
 707         }
 708
 709         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 710 }
 711
 712
 713 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 714                        enum nl80211_commands cmd, struct nlattr *frame)
 715 {
 716         if (frame == NULL) {
 717                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 718                            "data", cmd);
 719                 return;
 720         }
 721
 722         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 723         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 724                     nla_data(frame), nla_len(frame));
 725
 726         switch (cmd) {
 727         case NL80211_CMD_AUTHENTICATE:
 728                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 729                 break;
 730         case NL80211_CMD_ASSOCIATE:
 731                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 732                 break;
 733         case NL80211_CMD_DEAUTHENTICATE:
 734                 drv->associated = 0;
 735                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 736                 break;
 737         case NL80211_CMD_DISASSOCIATE:
 738                 drv->associated = 0;
 739                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 740                 break;
 741         default:
 742                 break;
 743         }
 744 }
 745
 746 #endif /* HOSTAPD */
 747
 748
 749 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 750                                            struct nlattr *tb[])
 751 {
 752 #ifdef HOSTAPD
 753         if (tb[NL80211_ATTR_MAC])
 754                 hostapd_michael_mic_failure(drv->hapd,
 755                                             nla_data(tb[NL80211_ATTR_MAC]));
 756 #else /* HOSTAPD */
 757         union wpa_event_data data;
 758
 759         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 760         os_memset(&data, 0, sizeof(data));
 761         if (tb[NL80211_ATTR_MAC]) {
 762                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 763                             nla_data(tb[NL80211_ATTR_MAC]),
 764                             nla_len(tb[NL80211_ATTR_MAC]));
 765         }
 766         if (tb[NL80211_ATTR_KEY_SEQ]) {
 767                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 768                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 769                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 770         }
 771         if (tb[NL80211_ATTR_KEY_TYPE]) {
 772                 enum nl80211_key_type key_type =
 773                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 774                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 775                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 776                         data.michael_mic_failure.unicast = 1;
 777         } else
 778                 data.michael_mic_failure.unicast = 1;
 779
 780         if (tb[NL80211_ATTR_KEY_IDX]) {
 781                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 782                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 783         }
 784
 785         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 786 #endif /* HOSTAPD */
 787 }
 788
 789
 790 static int process_event(struct nl_msg *msg, void *arg)
 791 {
 792         struct wpa_driver_nl80211_data *drv = arg;
 793         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 794         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 795
 796         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 797                   genlmsg_attrlen(gnlh, 0), NULL);
 798
 799         if (tb[NL80211_ATTR_IFINDEX]) {
 800                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 801                 if (ifindex != drv->ifindex) {
 802                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 803                                    " for foreign interface (ifindex %d)",
 804                                    gnlh->cmd, ifindex);
 805                         return NL_SKIP;
 806                 }
 807         }
 808
 809         switch (gnlh->cmd) {
 810 #ifndef HOSTAPD
 811         case NL80211_CMD_NEW_SCAN_RESULTS:
 812                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 813                 drv->scan_complete_events = 1;
 814                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 815                                      drv->ctx);
 816                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 817                 break;
 818         case NL80211_CMD_SCAN_ABORTED:
 819                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 820                 /*
 821                  * Need to indicate that scan results are available in order
 822                  * not to make wpa_supplicant stop its scanning.
 823                  */
 824                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 825                                      drv->ctx);
 826                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 827                 break;
 828         case NL80211_CMD_AUTHENTICATE:
 829         case NL80211_CMD_ASSOCIATE:
 830         case NL80211_CMD_DEAUTHENTICATE:
 831         case NL80211_CMD_DISASSOCIATE:
 832                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
 833                 break;
 834 #endif /* HOSTAPD */
 835         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 836                 mlme_event_michael_mic_failure(drv, tb);
 837                 break;
 838         default:
 839                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 840                            "(cmd=%d)", gnlh->cmd);
 841                 break;
 842         }
 843
 844         return NL_SKIP;
 845 }
 846
 847
 848 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 849                                              void *sock_ctx)
 850 {
 851         struct nl_cb *cb;
 852         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 853
 854         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 855
 856         cb = nl_cb_clone(drv->nl_cb);
 857         if (!cb)
 858                 return;
 859         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 860         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 861         nl_recvmsgs(drv->nl_handle, cb);
 862         nl_cb_put(cb);
 863 }
 864
 865
 866 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 867                                    const char *ifname, int dev_up)
 868 {
 869         struct ifreq ifr;
 870
 871         if (drv->ioctl_sock < 0)
 872                 return -1;
 873
 874         os_memset(&ifr, 0, sizeof(ifr));
 875         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 876
 877         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 878                 perror("ioctl[SIOCGIFFLAGS]");
 879                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 880                            ifname);
 881                 return -1;
 882         }
 883
 884         if (dev_up) {
 885                 if (ifr.ifr_flags & IFF_UP)
 886                         return 0;
 887                 ifr.ifr_flags |= IFF_UP;
 888         } else {
 889                 if (!(ifr.ifr_flags & IFF_UP))
 890                         return 0;
 891                 ifr.ifr_flags &= ~IFF_UP;
 892         }
 893
 894         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 895                 perror("ioctl[SIOCSIFFLAGS]");
 896                 return -1;
 897         }
 898
 899         return 0;
 900 }
 901
 902
 903 /**
 904  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 905  * @priv: driver_nl80211 private data
 906  * @alpha2_arg: country to which to switch to
 907  * Returns: 0 on success, -1 on failure
 908  *
 909  * This asks nl80211 to set the regulatory domain for given
 910  * country ISO / IEC alpha2.
 911  */
 912 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 913 {
 914         struct wpa_driver_nl80211_data *drv = priv;
 915         char alpha2[3];
 916         struct nl_msg *msg;
 917
 918         msg = nlmsg_alloc();
 919         if (!msg)
 920                 return -ENOMEM;
 921
 922         alpha2[0] = alpha2_arg[0];
 923         alpha2[1] = alpha2_arg[1];
 924         alpha2[2] = '\0';
 925
 926         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 927                     0, NL80211_CMD_REQ_SET_REG, 0);
 928
 929         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 930         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 931                 return -EINVAL;
 932         return 0;
 933 nla_put_failure:
 934         return -EINVAL;
 935 }
 936
 937
 938 struct wiphy_info_data {
 939         int max_scan_ssids;
 940         int ap_supported;
 941 };
 942
 943
 944 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 945 {
 946         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 947         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 948         struct wiphy_info_data *info = arg;
 949
 950         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 951                   genlmsg_attrlen(gnlh, 0), NULL);
 952
 953         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 954                 info->max_scan_ssids =
 955                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 956
 957         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 958                 struct nlattr *nl_mode;
 959                 int i;
 960                 nla_for_each_nested(nl_mode,
 961                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 962                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 963                                 info->ap_supported = 1;
 964                                 break;
 965                         }
 966                 }
 967         }
 968
 969         return NL_SKIP;
 970 }
 971
 972
 973 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 974                                        struct wiphy_info_data *info)
 975 {
 976         struct nl_msg *msg;
 977
 978         os_memset(info, 0, sizeof(*info));
 979         msg = nlmsg_alloc();
 980         if (!msg)
 981                 return -1;
 982
 983         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 984                     0, NL80211_CMD_GET_WIPHY, 0);
 985
 986         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 987
 988         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
 989                 return 0;
 990         msg = NULL;
 991 nla_put_failure:
 992         nlmsg_free(msg);
 993         return -1;
 994 }
 995
 996
 997 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
 998 {
 999         struct wiphy_info_data info;
1000         if (wpa_driver_nl80211_get_info(drv, &info))
1001                 return;
1002         drv->has_capability = 1;
1003         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1004         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1005                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1006                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1007                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1008         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1009                 WPA_DRIVER_CAPA_ENC_WEP104 |
1010                 WPA_DRIVER_CAPA_ENC_TKIP |
1011                 WPA_DRIVER_CAPA_ENC_CCMP;
1012
1013         drv->capa.max_scan_ssids = info.max_scan_ssids;
1014         if (info.ap_supported)
1015                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1016 }
1017
1018
1019 /**
1020  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1021  * @ctx: context to be used when calling wpa_supplicant functions,
1022  * e.g., wpa_supplicant_event()
1023  * @ifname: interface name, e.g., wlan0
1024  * Returns: Pointer to private data, %NULL on failure
1025  */
1026 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1027 {
1028         int s, ret;
1029         struct sockaddr_nl local;
1030         struct wpa_driver_nl80211_data *drv;
1031
1032         drv = os_zalloc(sizeof(*drv));
1033         if (drv == NULL)
1034                 return NULL;
1035         drv->ctx = ctx;
1036         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1037 #ifdef CONFIG_AP
1038         drv->monitor_ifidx = -1;
1039         drv->monitor_sock = -1;
1040 #endif /* CONFIG_AP */
1041
1042         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1043         if (drv->nl_cb == NULL) {
1044                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1045                            "callbacks");
1046                 goto err1;
1047         }
1048
1049         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1050         if (drv->nl_handle == NULL) {
1051                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1052                            "callbacks");
1053                 goto err2;
1054         }
1055
1056         if (genl_connect(drv->nl_handle)) {
1057                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1058                            "netlink");
1059                 goto err3;
1060         }
1061
1062         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1063         if (drv->nl_cache == NULL) {
1064                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1065                            "netlink cache");
1066                 goto err3;
1067         }
1068
1069         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1070         if (drv->nl80211 == NULL) {
1071                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1072                            "found");
1073                 goto err4;
1074         }
1075
1076         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1077         if (ret >= 0)
1078                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1079         if (ret < 0) {
1080                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1081                            "membership for scan events: %d (%s)",
1082                            ret, strerror(-ret));
1083                 goto err4;
1084         }
1085
1086         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1087         if (ret >= 0)
1088                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1089         if (ret < 0) {
1090                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1091                            "membership for mlme events: %d (%s)",
1092                            ret, strerror(-ret));
1093                 goto err4;
1094         }
1095         drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1096
1097         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1098                                  wpa_driver_nl80211_event_receive, drv, ctx);
1099
1100         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1101         if (drv->ioctl_sock < 0) {
1102                 perror("socket(PF_INET,SOCK_DGRAM)");
1103                 goto err5;
1104         }
1105
1106         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1107         if (s < 0) {
1108                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1109                 goto err6;
1110         }
1111
1112         os_memset(&local, 0, sizeof(local));
1113         local.nl_family = AF_NETLINK;
1114         local.nl_groups = RTMGRP_LINK;
1115         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1116                 perror("bind(netlink)");
1117                 close(s);
1118                 goto err6;
1119         }
1120
1121 #ifndef HOSTAPD
1122         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1123                                  ctx);
1124 #endif /* HOSTAPD */
1125         drv->link_event_sock = s;
1126
1127         if (wpa_driver_nl80211_finish_drv_init(drv))
1128                 goto err7;
1129
1130         return drv;
1131
1132 err7:
1133         eloop_unregister_read_sock(drv->link_event_sock);
1134         close(drv->link_event_sock);
1135 err6:
1136         close(drv->ioctl_sock);
1137 err5:
1138         genl_family_put(drv->nl80211);
1139 err4:
1140         nl_cache_free(drv->nl_cache);
1141 err3:
1142         nl_handle_destroy(drv->nl_handle);
1143 err2:
1144         nl_cb_put(drv->nl_cb);
1145 err1:
1146         os_free(drv);
1147         return NULL;
1148 }
1149
1150
1151 static int
1152 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1153 {
1154         drv->ifindex = if_nametoindex(drv->ifname);
1155
1156         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1157                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1158                            "use managed mode");
1159         }
1160
1161         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1162                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1163                            "UP", drv->ifname);
1164                 return -1;
1165         }
1166
1167         wpa_driver_nl80211_capa(drv);
1168
1169         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1170
1171         return 0;
1172 }
1173
1174
1175 /**
1176  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1177  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1178  *
1179  * Shut down driver interface and processing of driver events. Free
1180  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1181  */
1182 static void wpa_driver_nl80211_deinit(void *priv)
1183 {
1184         struct wpa_driver_nl80211_data *drv = priv;
1185
1186 #ifdef CONFIG_AP
1187         if (drv->monitor_ifidx >= 0)
1188                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1189         if (drv->monitor_sock >= 0) {
1190                 eloop_unregister_read_sock(drv->monitor_sock);
1191                 close(drv->monitor_sock);
1192         }
1193 #endif /* CONFIG_AP */
1194
1195         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1196
1197         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1198
1199         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1200
1201         eloop_unregister_read_sock(drv->link_event_sock);
1202
1203         hostapd_set_iface_flags(drv, drv->ifname, 0);
1204         wpa_driver_nl80211_set_mode(drv, 0);
1205
1206         close(drv->link_event_sock);
1207         close(drv->ioctl_sock);
1208
1209         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1210         genl_family_put(drv->nl80211);
1211         nl_cache_free(drv->nl_cache);
1212         nl_handle_destroy(drv->nl_handle);
1213         nl_cb_put(drv->nl_cb);
1214
1215         os_free(drv);
1216 }
1217
1218
1219 /**
1220  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1221  * @eloop_ctx: Unused
1222  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1223  *
1224  * This function can be used as registered timeout when starting a scan to
1225  * generate a scan completed event if the driver does not report this.
1226  */
1227 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1228 {
1229         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1230 #ifndef HOSTAPD
1231         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1232 #endif /* HOSTAPD */
1233 }
1234
1235
1236 /**
1237  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1238  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1239  * @params: Scan parameters
1240  * Returns: 0 on success, -1 on failure
1241  */
1242 static int wpa_driver_nl80211_scan(void *priv,
1243                                    struct wpa_driver_scan_params *params)
1244 {
1245         struct wpa_driver_nl80211_data *drv = priv;
1246         int ret = 0, timeout;
1247         struct nl_msg *msg, *ssids, *freqs;
1248         size_t i;
1249
1250         msg = nlmsg_alloc();
1251         ssids = nlmsg_alloc();
1252         freqs = nlmsg_alloc();
1253         if (!msg || !ssids || !freqs) {
1254                 nlmsg_free(msg);
1255                 nlmsg_free(ssids);
1256                 nlmsg_free(freqs);
1257                 return -1;
1258         }
1259
1260         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1261                     NL80211_CMD_TRIGGER_SCAN, 0);
1262
1263         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1264
1265         for (i = 0; i < params->num_ssids; i++) {
1266                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1267                         params->ssids[i].ssid);
1268         }
1269         if (params->num_ssids)
1270                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1271
1272         if (params->extra_ies) {
1273                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1274                         params->extra_ies);
1275         }
1276
1277         if (params->freqs) {
1278                 for (i = 0; params->freqs[i]; i++)
1279                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1280                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1281         }
1282
1283         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1284         msg = NULL;
1285         if (ret) {
1286                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1287                            "(%s)", ret, strerror(-ret));
1288                 goto nla_put_failure;
1289         }
1290
1291         /* Not all drivers generate "scan completed" wireless event, so try to
1292          * read results after a timeout. */
1293         timeout = 10;
1294         if (drv->scan_complete_events) {
1295                 /*
1296                  * The driver seems to deliver events to notify when scan is
1297                  * complete, so use longer timeout to avoid race conditions
1298                  * with scanning and following association request.
1299                  */
1300                 timeout = 30;
1301         }
1302         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1303                    "seconds", ret, timeout);
1304         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1305         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1306                                drv, drv->ctx);
1307
1308 nla_put_failure:
1309         nlmsg_free(ssids);
1310         nlmsg_free(msg);
1311         nlmsg_free(freqs);
1312         return ret;
1313 }
1314
1315
1316 static int bss_info_handler(struct nl_msg *msg, void *arg)
1317 {
1318         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1319         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1320         struct nlattr *bss[NL80211_BSS_MAX + 1];
1321         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1322                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1323                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1324                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1325                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1326                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1327                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1328                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1329                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1330         };
1331         struct wpa_scan_results *res = arg;
1332         struct wpa_scan_res **tmp;
1333         struct wpa_scan_res *r;
1334         const u8 *ie;
1335         size_t ie_len;
1336
1337         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1338                   genlmsg_attrlen(gnlh, 0), NULL);
1339         if (!tb[NL80211_ATTR_BSS])
1340                 return NL_SKIP;
1341         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1342                              bss_policy))
1343                 return NL_SKIP;
1344         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1345                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1346                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1347         } else {
1348                 ie = NULL;
1349                 ie_len = 0;
1350         }
1351
1352         r = os_zalloc(sizeof(*r) + ie_len);
1353         if (r == NULL)
1354                 return NL_SKIP;
1355         if (bss[NL80211_BSS_BSSID])
1356                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1357                           ETH_ALEN);
1358         if (bss[NL80211_BSS_FREQUENCY])
1359                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1360         if (bss[NL80211_BSS_BEACON_INTERVAL])
1361                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1362         if (bss[NL80211_BSS_CAPABILITY])
1363                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1364         r->flags |= WPA_SCAN_NOISE_INVALID;
1365         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1366                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1367                 r->level /= 100; /* mBm to dBm */
1368                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1369         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1370                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1371                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1372         } else
1373                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1374         if (bss[NL80211_BSS_TSF])
1375                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1376         r->ie_len = ie_len;
1377         if (ie)
1378                 os_memcpy(r + 1, ie, ie_len);
1379
1380         tmp = os_realloc(res->res,
1381                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1382         if (tmp == NULL) {
1383                 os_free(r);
1384                 return NL_SKIP;
1385         }
1386         tmp[res->num++] = r;
1387         res->res = tmp;
1388
1389         return NL_SKIP;
1390 }
1391
1392
1393 /**
1394  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1395  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1396  * Returns: Scan results on success, -1 on failure
1397  */
1398 static struct wpa_scan_results *
1399 wpa_driver_nl80211_get_scan_results(void *priv)
1400 {
1401         struct wpa_driver_nl80211_data *drv = priv;
1402         struct nl_msg *msg;
1403         struct wpa_scan_results *res;
1404         int ret;
1405
1406         res = os_zalloc(sizeof(*res));
1407         if (res == NULL)
1408                 return 0;
1409         msg = nlmsg_alloc();
1410         if (!msg)
1411                 goto nla_put_failure;
1412
1413         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1414                     NL80211_CMD_GET_SCAN, 0);
1415         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1416
1417         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1418         msg = NULL;
1419         if (ret == 0) {
1420                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1421                            (unsigned long) res->num);
1422                 return res;
1423         }
1424         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1425                    "(%s)", ret, strerror(-ret));
1426 nla_put_failure:
1427         nlmsg_free(msg);
1428         wpa_scan_results_free(res);
1429         return NULL;
1430 }
1431
1432
1433 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1434                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1435                        const u8 *seq, size_t seq_len,
1436                        const u8 *key, size_t key_len)
1437 {
1438         struct nl_msg *msg;
1439         int ret;
1440
1441         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1442                    "set_tx=%d seq_len=%lu key_len=%lu",
1443                    __func__, ifindex, alg, addr, key_idx, set_tx,
1444                    (unsigned long) seq_len, (unsigned long) key_len);
1445
1446         msg = nlmsg_alloc();
1447         if (!msg)
1448                 return -ENOMEM;
1449
1450         if (alg == WPA_ALG_NONE) {
1451                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1452                             0, NL80211_CMD_DEL_KEY, 0);
1453         } else {
1454                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1455                             0, NL80211_CMD_NEW_KEY, 0);
1456                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1457                 switch (alg) {
1458                 case WPA_ALG_WEP:
1459                         if (key_len == 5)
1460                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1461                                             0x000FAC01);
1462                         else
1463                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1464                                             0x000FAC05);
1465                         break;
1466                 case WPA_ALG_TKIP:
1467                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1468                         break;
1469                 case WPA_ALG_CCMP:
1470                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1471                         break;
1472                 case WPA_ALG_IGTK:
1473                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1474                         break;
1475                 default:
1476                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1477                                    "algorithm %d", __func__, alg);
1478                         nlmsg_free(msg);
1479                         return -1;
1480                 }
1481         }
1482
1483         if (seq)
1484                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1485
1486         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1487         {
1488                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1489                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1490         }
1491         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1492         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1493
1494         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1495         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1496                 ret = 0;
1497         if (ret)
1498                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1499                            ret, strerror(-ret));
1500
1501         /*
1502          * If we failed or don't need to set the default TX key (below),
1503          * we're done here.
1504          */
1505         if (ret || !set_tx || alg == WPA_ALG_NONE)
1506                 return ret;
1507 #ifdef HOSTAPD /* FIX: is this needed? */
1508         if (addr)
1509                 return ret;
1510 #endif /* HOSTAPD */
1511
1512         msg = nlmsg_alloc();
1513         if (!msg)
1514                 return -ENOMEM;
1515
1516         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1517                     0, NL80211_CMD_SET_KEY, 0);
1518         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1519         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1520         if (alg == WPA_ALG_IGTK)
1521                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1522         else
1523                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1524
1525         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1526         if (ret == -ENOENT)
1527                 ret = 0;
1528         if (ret)
1529                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1530                            "err=%d %s)", ret, strerror(-ret));
1531         return ret;
1532
1533 nla_put_failure:
1534         return -ENOBUFS;
1535 }
1536
1537
1538 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1539                                       const u8 *addr, int key_idx,
1540                                       int set_tx, const u8 *seq,
1541                                       size_t seq_len,
1542                                       const u8 *key, size_t key_len)
1543 {
1544         struct wpa_driver_nl80211_data *drv = priv;
1545         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1546                            seq_len, key, key_len);
1547 }
1548
1549
1550 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1551                                    const u8 *addr, int cmd, u16 reason_code)
1552 {
1553         int ret = -1;
1554         struct nl_msg *msg;
1555
1556         msg = nlmsg_alloc();
1557         if (!msg)
1558                 return -1;
1559
1560         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1561
1562         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1563         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1564         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1565
1566         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1567         msg = NULL;
1568         if (ret) {
1569                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1570                            "(%s)", ret, strerror(-ret));
1571                 goto nla_put_failure;
1572         }
1573         ret = 0;
1574
1575 nla_put_failure:
1576         nlmsg_free(msg);
1577         return ret;
1578 }
1579
1580
1581 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1582                                              int reason_code)
1583 {
1584         struct wpa_driver_nl80211_data *drv = priv;
1585         wpa_printf(MSG_DEBUG, "%s", __func__);
1586         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1587                                        reason_code);
1588 }
1589
1590
1591 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1592                                            int reason_code)
1593 {
1594         struct wpa_driver_nl80211_data *drv = priv;
1595         wpa_printf(MSG_DEBUG, "%s", __func__);
1596         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1597                                        reason_code);
1598 }
1599
1600
1601 static int wpa_driver_nl80211_authenticate(
1602         void *priv, struct wpa_driver_auth_params *params)
1603 {
1604         struct wpa_driver_nl80211_data *drv = priv;
1605         int ret = -1, i;
1606         struct nl_msg *msg;
1607         enum nl80211_auth_type type;
1608
1609         drv->associated = 0;
1610
1611         msg = nlmsg_alloc();
1612         if (!msg)
1613                 return -1;
1614
1615         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1616                    drv->ifindex);
1617
1618         for (i = 0; i < 4; i++) {
1619                 if (!params->wep_key[i])
1620                         continue;
1621                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1622                                            i == params->wep_tx_keyidx, NULL, 0,
1623                                            params->wep_key[i],
1624                                            params->wep_key_len[i]);
1625         }
1626
1627         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1628                     NL80211_CMD_AUTHENTICATE, 0);
1629
1630         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1631         if (params->bssid) {
1632                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1633                            MAC2STR(params->bssid));
1634                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1635         }
1636         if (params->freq) {
1637                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1638                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1639         }
1640         if (params->ssid) {
1641                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1642                                   params->ssid, params->ssid_len);
1643                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1644                         params->ssid);
1645         }
1646         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1647         if (params->ie)
1648                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1649         /*
1650          * TODO: if multiple auth_alg options enabled, try them one by one if
1651          * the AP rejects authentication due to unknown auth alg
1652          */
1653         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1654                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1655         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1656                 type = NL80211_AUTHTYPE_SHARED_KEY;
1657         else if (params->auth_alg & AUTH_ALG_LEAP)
1658                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1659         else if (params->auth_alg & AUTH_ALG_FT)
1660                 type = NL80211_AUTHTYPE_FT;
1661         else
1662                 goto nla_put_failure;
1663         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1664         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1665
1666         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1667         msg = NULL;
1668         if (ret) {
1669                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1670                            "(%s)", ret, strerror(-ret));
1671                 goto nla_put_failure;
1672         }
1673         ret = 0;
1674         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1675                    "successfully");
1676
1677 nla_put_failure:
1678         nlmsg_free(msg);
1679         return ret;
1680 }
1681
1682
1683 #if defined(CONFIG_AP) || defined(HOSTAPD)
1684
1685 struct phy_info_arg {
1686         u16 *num_modes;
1687         struct hostapd_hw_modes *modes;
1688 };
1689
1690 static int phy_info_handler(struct nl_msg *msg, void *arg)
1691 {
1692         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1693         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1694         struct phy_info_arg *phy_info = arg;
1695
1696         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1697
1698         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1699         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1700                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1701                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1702                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1703                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1704                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1705                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1706         };
1707
1708         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1709         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1710                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1711                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1712         };
1713
1714         struct nlattr *nl_band;
1715         struct nlattr *nl_freq;
1716         struct nlattr *nl_rate;
1717         int rem_band, rem_freq, rem_rate;
1718         struct hostapd_hw_modes *mode;
1719         int idx, mode_is_set;
1720
1721         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1722                   genlmsg_attrlen(gnlh, 0), NULL);
1723
1724         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1725                 return NL_SKIP;
1726
1727         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1728                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1729                 if (!mode)
1730                         return NL_SKIP;
1731                 phy_info->modes = mode;
1732
1733                 mode_is_set = 0;
1734
1735                 mode = &phy_info->modes[*(phy_info->num_modes)];
1736                 memset(mode, 0, sizeof(*mode));
1737                 *(phy_info->num_modes) += 1;
1738
1739                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1740                           nla_len(nl_band), NULL);
1741
1742                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1743                         mode->ht_capab = nla_get_u16(
1744                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1745                 }
1746
1747                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1748                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1749                                   nla_len(nl_freq), freq_policy);
1750                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1751                                 continue;
1752                         mode->num_channels++;
1753                 }
1754
1755                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1756                 if (!mode->channels)
1757                         return NL_SKIP;
1758
1759                 idx = 0;
1760
1761                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1762                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1763                                   nla_len(nl_freq), freq_policy);
1764                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1765                                 continue;
1766
1767                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1768                         mode->channels[idx].flag = 0;
1769
1770                         if (!mode_is_set) {
1771                                 /* crude heuristic */
1772                                 if (mode->channels[idx].freq < 4000)
1773                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1774                                 else
1775                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1776                                 mode_is_set = 1;
1777                         }
1778
1779                         /* crude heuristic */
1780                         if (mode->channels[idx].freq < 4000)
1781                                 if (mode->channels[idx].freq == 2484)
1782                                         mode->channels[idx].chan = 14;
1783                                 else
1784                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1785                         else
1786                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1787
1788                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1789                                 mode->channels[idx].flag |=
1790                                         HOSTAPD_CHAN_DISABLED;
1791                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1792                                 mode->channels[idx].flag |=
1793                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1794                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1795                                 mode->channels[idx].flag |=
1796                                         HOSTAPD_CHAN_NO_IBSS;
1797                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1798                                 mode->channels[idx].flag |=
1799                                         HOSTAPD_CHAN_RADAR;
1800
1801                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1802                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1803                                 mode->channels[idx].max_tx_power =
1804                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1805
1806                         idx++;
1807                 }
1808
1809                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1810                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1811                                   nla_len(nl_rate), rate_policy);
1812                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1813                                 continue;
1814                         mode->num_rates++;
1815                 }
1816
1817                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1818                 if (!mode->rates)
1819                         return NL_SKIP;
1820
1821                 idx = 0;
1822
1823                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1824                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1825                                   nla_len(nl_rate), rate_policy);
1826                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1827                                 continue;
1828                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1829
1830                         /* crude heuristic */
1831                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1832                             mode->rates[idx].rate > 200)
1833                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1834
1835                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1836                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1837
1838                         idx++;
1839                 }
1840         }
1841
1842         return NL_SKIP;
1843 }
1844
1845 static struct hostapd_hw_modes *
1846 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1847 {
1848         u16 m;
1849         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1850         int i, mode11g_idx = -1;
1851
1852         /* If only 802.11g mode is included, use it to construct matching
1853          * 802.11b mode data. */
1854
1855         for (m = 0; m < *num_modes; m++) {
1856                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1857                         return modes; /* 802.11b already included */
1858                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1859                         mode11g_idx = m;
1860         }
1861
1862         if (mode11g_idx < 0)
1863                 return modes; /* 2.4 GHz band not supported at all */
1864
1865         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1866         if (nmodes == NULL)
1867                 return modes; /* Could not add 802.11b mode */
1868
1869         mode = &nmodes[*num_modes];
1870         os_memset(mode, 0, sizeof(*mode));
1871         (*num_modes)++;
1872         modes = nmodes;
1873
1874         mode->mode = HOSTAPD_MODE_IEEE80211B;
1875
1876         mode11g = &modes[mode11g_idx];
1877         mode->num_channels = mode11g->num_channels;
1878         mode->channels = os_malloc(mode11g->num_channels *
1879                                    sizeof(struct hostapd_channel_data));
1880         if (mode->channels == NULL) {
1881                 (*num_modes)--;
1882                 return modes; /* Could not add 802.11b mode */
1883         }
1884         os_memcpy(mode->channels, mode11g->channels,
1885                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
1886
1887         mode->num_rates = 0;
1888         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1889         if (mode->rates == NULL) {
1890                 os_free(mode->channels);
1891                 (*num_modes)--;
1892                 return modes; /* Could not add 802.11b mode */
1893         }
1894
1895         for (i = 0; i < mode11g->num_rates; i++) {
1896                 if (mode11g->rates[i].rate > 110 ||
1897                     mode11g->rates[i].flags &
1898                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1899                         continue;
1900                 mode->rates[mode->num_rates] = mode11g->rates[i];
1901                 mode->num_rates++;
1902                 if (mode->num_rates == 4)
1903                         break;
1904         }
1905
1906         if (mode->num_rates == 0) {
1907                 os_free(mode->channels);
1908                 os_free(mode->rates);
1909                 (*num_modes)--;
1910                 return modes; /* No 802.11b rates */
1911         }
1912
1913         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1914                    "information");
1915
1916         return modes;
1917 }
1918
1919
1920 static struct hostapd_hw_modes *
1921 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1922 {
1923         struct wpa_driver_nl80211_data *drv = priv;
1924         struct nl_msg *msg;
1925         struct phy_info_arg result = {
1926                 .num_modes = num_modes,
1927                 .modes = NULL,
1928         };
1929
1930         *num_modes = 0;
1931         *flags = 0;
1932
1933         msg = nlmsg_alloc();
1934         if (!msg)
1935                 return NULL;
1936
1937         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1938                     0, NL80211_CMD_GET_WIPHY, 0);
1939
1940         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1941
1942         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1943                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1944  nla_put_failure:
1945         return NULL;
1946 }
1947
1948
1949 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1950                                          const void *data, size_t len,
1951                                          int encrypt)
1952 {
1953         __u8 rtap_hdr[] = {
1954                 0x00, 0x00, /* radiotap version */
1955                 0x0e, 0x00, /* radiotap length */
1956                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1957                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1958                 0x00,       /* padding */
1959                 0x00, 0x00, /* RX and TX flags to indicate that */
1960                 0x00, 0x00, /* this is the injected frame directly */
1961         };
1962         struct iovec iov[2] = {
1963                 {
1964                         .iov_base = &rtap_hdr,
1965                         .iov_len = sizeof(rtap_hdr),
1966                 },
1967                 {
1968                         .iov_base = (void *) data,
1969                         .iov_len = len,
1970                 }
1971         };
1972         struct msghdr msg = {
1973                 .msg_name = NULL,
1974                 .msg_namelen = 0,
1975                 .msg_iov = iov,
1976                 .msg_iovlen = 2,
1977                 .msg_control = NULL,
1978                 .msg_controllen = 0,
1979                 .msg_flags = 0,
1980         };
1981
1982         if (encrypt)
1983                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
1984
1985         return sendmsg(drv->monitor_sock, &msg, 0);
1986 }
1987
1988
1989 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
1990                                         size_t data_len)
1991 {
1992         struct wpa_driver_nl80211_data *drv = priv;
1993         struct ieee80211_mgmt *mgmt;
1994         int do_not_encrypt = 0;
1995         u16 fc;
1996
1997         mgmt = (struct ieee80211_mgmt *) data;
1998         fc = le_to_host16(mgmt->frame_control);
1999
2000         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2001             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2002                 /*
2003                  * Only one of the authentication frame types is encrypted.
2004                  * In order for static WEP encryption to work properly (i.e.,
2005                  * to not encrypt the frame), we need to tell mac80211 about
2006                  * the frames that must not be encrypted.
2007                  */
2008                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2009                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2010                 if (auth_alg == WLAN_AUTH_OPEN ||
2011                     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2012                         do_not_encrypt = 1;
2013         }
2014
2015         return wpa_driver_nl80211_send_frame(drv, data, data_len,
2016                                              !do_not_encrypt);
2017 }
2018
2019
2020 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2021                                                const u8 *head, size_t head_len,
2022                                                const u8 *tail, size_t tail_len,
2023                                                int dtim_period)
2024 {
2025         struct wpa_driver_nl80211_data *drv = priv;
2026         struct nl_msg *msg;
2027         u8 cmd = NL80211_CMD_NEW_BEACON;
2028         int ret;
2029         int beacon_set;
2030 #ifdef HOSTAPD
2031         struct i802_bss *bss;
2032
2033         bss = get_bss(drv, ifindex);
2034         if (bss == NULL)
2035                 return -ENOENT;
2036         beacon_set = bss->beacon_set;
2037 #else /* HOSTAPD */
2038         beacon_set = drv->beacon_set;
2039 #endif /* HOSTAPD */
2040
2041         msg = nlmsg_alloc();
2042         if (!msg)
2043                 return -ENOMEM;
2044
2045         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2046                    beacon_set);
2047         if (beacon_set)
2048                 cmd = NL80211_CMD_SET_BEACON;
2049
2050         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2051                     0, cmd, 0);
2052         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2053         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2054         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2055         if (!drv->beacon_int)
2056                 drv->beacon_int = 100;
2057         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2058         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2059
2060         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2061         if (ret) {
2062                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2063                            ret, strerror(-ret));
2064         } else {
2065 #ifdef HOSTAPD
2066                 bss->beacon_set = 1;
2067 #else /* HOSTAPD */
2068                 drv->beacon_set = 1;
2069 #endif /* HOSTAPD */
2070         }
2071         return ret;
2072  nla_put_failure:
2073         return -ENOBUFS;
2074 }
2075
2076
2077 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2078 {
2079         struct wpa_driver_nl80211_data *drv = priv;
2080         struct nl_msg *msg;
2081
2082         drv->beacon_int = value;
2083
2084 #ifdef HOSTAPD
2085         if (!drv->bss.beacon_set)
2086                 return 0;
2087 #else /* HOSTAPD */
2088         if (!drv->beacon_set)
2089                 return 0;
2090 #endif /* HOSTAPD */
2091
2092         msg = nlmsg_alloc();
2093         if (!msg)
2094                 return -ENOMEM;
2095
2096         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2097         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2098                     0, NL80211_CMD_SET_BEACON, 0);
2099         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2100
2101         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2102
2103         return send_and_recv_msgs(drv, msg, NULL, NULL);
2104  nla_put_failure:
2105         return -ENOBUFS;
2106 }
2107
2108 #endif /* CONFIG_AP || HOSTAPD */
2109
2110
2111 #ifdef CONFIG_AP
2112
2113 static int wpa_driver_nl80211_set_beacon(void *priv,
2114                                          const u8 *head, size_t head_len,
2115                                          const u8 *tail, size_t tail_len,
2116                                          int dtim_period)
2117 {
2118         struct wpa_driver_nl80211_data *drv = priv;
2119         return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2120                                                    head, head_len,
2121                                                    tail, tail_len,
2122                                                    dtim_period);
2123 }
2124
2125
2126 static int wpa_driver_nl80211_set_freq2(
2127         struct wpa_driver_nl80211_data *drv,
2128         struct wpa_driver_associate_params *params)
2129 {
2130         struct nl_msg *msg;
2131         int ret;
2132
2133         msg = nlmsg_alloc();
2134         if (!msg)
2135                 return -1;
2136
2137         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2138                     NL80211_CMD_SET_WIPHY, 0);
2139
2140         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2141
2142         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2143
2144         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2145         if (ret == 0)
2146                 return 0;
2147         wpa_printf(MSG_DEBUG, "nl80211: MLME Failed to set channel (freq=%d): "
2148                    "%d (%s)", params->freq, ret, strerror(-ret));
2149 nla_put_failure:
2150         return -1;
2151 }
2152
2153 #endif /* CONFIG_AP */
2154
2155 #if defined(CONFIG_AP) || defined(HOSTAPD)
2156
2157 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2158                                  int ifidx)
2159 {
2160         struct nl_msg *msg;
2161
2162 #ifdef HOSTAPD
2163         /* stop listening for EAPOL on this interface */
2164         del_ifidx(drv, ifidx);
2165 #endif /* HOSTAPD */
2166
2167         msg = nlmsg_alloc();
2168         if (!msg)
2169                 goto nla_put_failure;
2170
2171         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2172                     0, NL80211_CMD_DEL_INTERFACE, 0);
2173         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2174
2175         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2176                 return;
2177  nla_put_failure:
2178         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2179                    ifidx);
2180 }
2181
2182
2183 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2184                                 const char *ifname, enum nl80211_iftype iftype,
2185                                 const u8 *addr)
2186 {
2187         struct nl_msg *msg, *flags = NULL;
2188         int ifidx;
2189         int ret = -ENOBUFS;
2190 #ifdef HOSTAPD
2191         struct ifreq ifreq;
2192         struct iwreq iwr;
2193 #endif /* HOSTAPD */
2194
2195         msg = nlmsg_alloc();
2196         if (!msg)
2197                 return -1;
2198
2199         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2200                     0, NL80211_CMD_NEW_INTERFACE, 0);
2201         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2202         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2203         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2204
2205         if (iftype == NL80211_IFTYPE_MONITOR) {
2206                 int err;
2207
2208                 flags = nlmsg_alloc();
2209                 if (!flags)
2210                         goto nla_put_failure;
2211
2212                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2213
2214                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2215
2216                 nlmsg_free(flags);
2217
2218                 if (err)
2219                         goto nla_put_failure;
2220         }
2221
2222         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2223         if (ret) {
2224  nla_put_failure:
2225                 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2226                            ifname);
2227                 return ret;
2228         }
2229
2230         ifidx = if_nametoindex(ifname);
2231
2232         if (ifidx <= 0)
2233                 return -1;
2234
2235 #ifdef HOSTAPD
2236         /* start listening for EAPOL on this interface */
2237         add_ifidx(drv, ifidx);
2238
2239         if (addr) {
2240                 switch (iftype) {
2241                 case NL80211_IFTYPE_AP:
2242                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
2243                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
2244                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2245
2246                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
2247                                 nl80211_remove_iface(drv, ifidx);
2248                                 return -1;
2249                         }
2250                         break;
2251                 case NL80211_IFTYPE_WDS:
2252                         memset(&iwr, 0, sizeof(iwr));
2253                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
2254                         iwr.u.addr.sa_family = ARPHRD_ETHER;
2255                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
2256                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
2257                                 return -1;
2258                         break;
2259                 default:
2260                         /* nothing */
2261                         break;
2262                 }
2263         }
2264 #endif /* HOSTAPD */
2265
2266         return ifidx;
2267 }
2268
2269 #endif /* CONFIG_AP || HOSTAPD */
2270
2271 #ifdef CONFIG_AP
2272
2273 void ap_tx_status(void *ctx, const u8 *addr,
2274                   const u8 *buf, size_t len, int ack);
2275 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2276 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2277                 struct hostapd_frame_info *fi);
2278 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2279
2280 #endif /* CONFIG_AP */
2281
2282 #if defined(CONFIG_AP) || defined(HOSTAPD)
2283
2284 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2285 {
2286         struct ieee80211_hdr *hdr;
2287         u16 fc, type, stype;
2288
2289         hdr = (struct ieee80211_hdr *) buf;
2290         fc = le_to_host16(hdr->frame_control);
2291
2292         type = WLAN_FC_GET_TYPE(fc);
2293         stype = WLAN_FC_GET_STYPE(fc);
2294
2295         switch (type) {
2296         case WLAN_FC_TYPE_MGMT:
2297                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2298                            ok ? "ACK" : "fail");
2299 #ifdef HOSTAPD
2300                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2301 #else /* HOSTAPD */
2302                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2303 #endif /* HOSTAPD */
2304                 break;
2305         case WLAN_FC_TYPE_CTRL:
2306                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2307                            ok ? "ACK" : "fail");
2308                 break;
2309         case WLAN_FC_TYPE_DATA:
2310 #ifdef HOSTAPD
2311                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2312 #else /* HOSTAPD */
2313                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2314 #endif /* HOSTAPD */
2315                 break;
2316         default:
2317                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2318                            type);
2319                 break;
2320         }
2321 }
2322
2323 #endif /* CONFIG_AP || HOSTAPD */
2324
2325 #ifdef CONFIG_AP
2326
2327 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2328                          u8 *buf, size_t len,
2329                          struct hostapd_frame_info *hfi,
2330                          enum ieee80211_msg_type msg_type)
2331 {
2332         struct ieee80211_hdr *hdr;
2333         u16 fc, type, stype;
2334         size_t data_len = len;
2335
2336         /*
2337          * PS-Poll frames are 16 bytes. All other frames are
2338          * 24 bytes or longer.
2339          */
2340         if (len < 16)
2341                 return;
2342
2343         hdr = (struct ieee80211_hdr *) buf;
2344         fc = le_to_host16(hdr->frame_control);
2345
2346         type = WLAN_FC_GET_TYPE(fc);
2347         stype = WLAN_FC_GET_STYPE(fc);
2348
2349         switch (type) {
2350         case WLAN_FC_TYPE_DATA:
2351                 if (len < 24)
2352                         return;
2353                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2354                 case WLAN_FC_TODS:
2355                         break;
2356                 case WLAN_FC_FROMDS:
2357                         break;
2358                 default:
2359                         /* discard */
2360                         return;
2361                 }
2362                 break;
2363         case WLAN_FC_TYPE_CTRL:
2364                 /* discard non-ps-poll frames */
2365                 if (stype != WLAN_FC_STYPE_PSPOLL)
2366                         return;
2367                 break;
2368         case WLAN_FC_TYPE_MGMT:
2369                 break;
2370         default:
2371                 /* discard */
2372                 return;
2373         }
2374
2375         switch (msg_type) {
2376         case ieee80211_msg_normal:
2377                 /* continue processing */
2378                 break;
2379         case ieee80211_msg_tx_callback_ack:
2380                 handle_tx_callback(drv->ctx, buf, data_len, 1);
2381                 return;
2382         case ieee80211_msg_tx_callback_fail:
2383                 handle_tx_callback(drv->ctx, buf, data_len, 0);
2384                 return;
2385         }
2386
2387         switch (type) {
2388         case WLAN_FC_TYPE_MGMT:
2389                 if (stype != WLAN_FC_STYPE_BEACON &&
2390                     stype != WLAN_FC_STYPE_PROBE_REQ)
2391                         wpa_printf(MSG_MSGDUMP, "MGMT");
2392                 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2393                 break;
2394         case WLAN_FC_TYPE_CTRL:
2395                 /* can only get here with PS-Poll frames */
2396                 wpa_printf(MSG_DEBUG, "CTRL");
2397                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2398                 break;
2399         case WLAN_FC_TYPE_DATA:
2400                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2401                 break;
2402         }
2403 }
2404
2405 #endif /* CONFIG_AP */
2406
2407 #if defined(CONFIG_AP) || defined(HOSTAPD)
2408
2409 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2410 {
2411         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2412         int len;
2413         unsigned char buf[3000];
2414         struct ieee80211_radiotap_iterator iter;
2415         int ret;
2416         struct hostapd_frame_info hfi;
2417         int injected = 0, failed = 0, msg_type, rxflags = 0;
2418
2419         len = recv(sock, buf, sizeof(buf), 0);
2420         if (len < 0) {
2421                 perror("recv");
2422                 return;
2423         }
2424
2425         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2426                 printf("received invalid radiotap frame\n");
2427                 return;
2428         }
2429
2430         memset(&hfi, 0, sizeof(hfi));
2431
2432         while (1) {
2433                 ret = ieee80211_radiotap_iterator_next(&iter);
2434                 if (ret == -ENOENT)
2435                         break;
2436                 if (ret) {
2437                         printf("received invalid radiotap frame (%d)\n", ret);
2438                         return;
2439                 }
2440                 switch (iter.this_arg_index) {
2441                 case IEEE80211_RADIOTAP_FLAGS:
2442                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2443                                 len -= 4;
2444                         break;
2445                 case IEEE80211_RADIOTAP_RX_FLAGS:
2446                         rxflags = 1;
2447                         break;
2448                 case IEEE80211_RADIOTAP_TX_FLAGS:
2449                         injected = 1;
2450                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2451                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2452                         break;
2453                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2454                         break;
2455                 case IEEE80211_RADIOTAP_CHANNEL:
2456                         /* TODO convert from freq/flags to channel number
2457                         hfi.channel = XXX;
2458                         hfi.phytype = XXX;
2459                          */
2460                         break;
2461                 case IEEE80211_RADIOTAP_RATE:
2462                         hfi.datarate = *iter.this_arg * 5;
2463                         break;
2464                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2465                         hfi.ssi_signal = *iter.this_arg;
2466                         break;
2467                 }
2468         }
2469
2470         if (rxflags && injected)
2471                 return;
2472
2473         if (!injected)
2474                 msg_type = ieee80211_msg_normal;
2475         else if (failed)
2476                 msg_type = ieee80211_msg_tx_callback_fail;
2477         else
2478                 msg_type = ieee80211_msg_tx_callback_ack;
2479
2480         handle_frame(drv, buf + iter.max_length,
2481                      len - iter.max_length, &hfi, msg_type);
2482 }
2483
2484
2485 /*
2486  * we post-process the filter code later and rewrite
2487  * this to the offset to the last instruction
2488  */
2489 #define PASS    0xFF
2490 #define FAIL    0xFE
2491
2492 static struct sock_filter msock_filter_insns[] = {
2493         /*
2494          * do a little-endian load of the radiotap length field
2495          */
2496         /* load lower byte into A */
2497         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2498         /* put it into X (== index register) */
2499         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2500         /* load upper byte into A */
2501         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2502         /* left-shift it by 8 */
2503         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2504         /* or with X */
2505         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2506         /* put result into X */
2507         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2508
2509         /*
2510          * Allow management frames through, this also gives us those
2511          * management frames that we sent ourselves with status
2512          */
2513         /* load the lower byte of the IEEE 802.11 frame control field */
2514         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2515         /* mask off frame type and version */
2516         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2517         /* accept frame if it's both 0, fall through otherwise */
2518         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2519
2520         /*
2521          * TODO: add a bit to radiotap RX flags that indicates
2522          * that the sending station is not associated, then
2523          * add a filter here that filters on our DA and that flag
2524          * to allow us to deauth frames to that bad station.
2525          *
2526          * Not a regression -- we didn't do it before either.
2527          */
2528
2529 #if 0
2530         /*
2531          * drop non-data frames, WDS frames
2532          */
2533         /* load the lower byte of the frame control field */
2534         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2535         /* mask off QoS bit */
2536         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2537         /* drop non-data frames */
2538         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2539         /* load the upper byte of the frame control field */
2540         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2541         /* mask off toDS/fromDS */
2542         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2543         /* drop WDS frames */
2544         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2545 #endif
2546
2547         /*
2548          * add header length to index
2549          */
2550         /* load the lower byte of the frame control field */
2551         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2552         /* mask off QoS bit */
2553         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2554         /* right shift it by 6 to give 0 or 2 */
2555         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2556         /* add data frame header length */
2557         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2558         /* add index, was start of 802.11 header */
2559         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2560         /* move to index, now start of LL header */
2561         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2562
2563         /*
2564          * Accept empty data frames, we use those for
2565          * polling activity.
2566          */
2567         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2568         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2569
2570         /*
2571          * Accept EAPOL frames
2572          */
2573         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2574         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2575         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2576         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2577
2578         /* keep these last two statements or change the code below */
2579         /* return 0 == "DROP" */
2580         BPF_STMT(BPF_RET | BPF_K, 0),
2581         /* return ~0 == "keep all" */
2582         BPF_STMT(BPF_RET | BPF_K, ~0),
2583 };
2584
2585 static struct sock_fprog msock_filter = {
2586         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2587         .filter = msock_filter_insns,
2588 };
2589
2590
2591 static int add_monitor_filter(int s)
2592 {
2593         int idx;
2594
2595         /* rewrite all PASS/FAIL jump offsets */
2596         for (idx = 0; idx < msock_filter.len; idx++) {
2597                 struct sock_filter *insn = &msock_filter_insns[idx];
2598
2599                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2600                         if (insn->code == (BPF_JMP|BPF_JA)) {
2601                                 if (insn->k == PASS)
2602                                         insn->k = msock_filter.len - idx - 2;
2603                                 else if (insn->k == FAIL)
2604                                         insn->k = msock_filter.len - idx - 3;
2605                         }
2606
2607                         if (insn->jt == PASS)
2608                                 insn->jt = msock_filter.len - idx - 2;
2609                         else if (insn->jt == FAIL)
2610                                 insn->jt = msock_filter.len - idx - 3;
2611
2612                         if (insn->jf == PASS)
2613                                 insn->jf = msock_filter.len - idx - 2;
2614                         else if (insn->jf == FAIL)
2615                                 insn->jf = msock_filter.len - idx - 3;
2616                 }
2617         }
2618
2619         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2620                        &msock_filter, sizeof(msock_filter))) {
2621                 perror("SO_ATTACH_FILTER");
2622                 return -1;
2623         }
2624
2625         return 0;
2626 }
2627
2628
2629 static int
2630 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2631 {
2632         char buf[IFNAMSIZ];
2633         struct sockaddr_ll ll;
2634         int optval;
2635         socklen_t optlen;
2636
2637         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2638         buf[IFNAMSIZ - 1] = '\0';
2639
2640         drv->monitor_ifidx =
2641                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2642
2643         if (drv->monitor_ifidx < 0)
2644                 return -1;
2645
2646         if (hostapd_set_iface_flags(drv, buf, 1))
2647                 goto error;
2648
2649         memset(&ll, 0, sizeof(ll));
2650         ll.sll_family = AF_PACKET;
2651         ll.sll_ifindex = drv->monitor_ifidx;
2652         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2653         if (drv->monitor_sock < 0) {
2654                 perror("socket[PF_PACKET,SOCK_RAW]");
2655                 goto error;
2656         }
2657
2658         if (add_monitor_filter(drv->monitor_sock)) {
2659                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2660                            "interface; do filtering in user space");
2661                 /* This works, but will cost in performance. */
2662         }
2663
2664         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2665                 perror("monitor socket bind");
2666                 goto error;
2667         }
2668
2669         optlen = sizeof(optval);
2670         optval = 20;
2671         if (setsockopt
2672             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2673                 perror("Failed to set socket priority");
2674                 goto error;
2675         }
2676
2677         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2678                                      drv, NULL)) {
2679                 printf("Could not register monitor read socket\n");
2680                 goto error;
2681         }
2682
2683         return 0;
2684  error:
2685         nl80211_remove_iface(drv, drv->monitor_ifidx);
2686         return -1;
2687 }
2688
2689 #endif /* CONFIG_AP || HOSTAPD */
2690
2691 #ifdef CONFIG_AP
2692
2693 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2694                                  struct wpa_driver_associate_params *params)
2695 {
2696         if (drv->monitor_ifidx < 0 &&
2697             nl80211_create_monitor_interface(drv))
2698                 return -1;
2699
2700         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2701             wpa_driver_nl80211_set_freq2(drv, params)) {
2702                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2703                 drv->monitor_ifidx = -1;
2704                 return -1;
2705         }
2706
2707         /* TODO: setup monitor interface (and add code somewhere to remove this
2708          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2709
2710         return 0;
2711 }
2712 #endif /* CONFIG_AP */
2713
2714
2715 static int wpa_driver_nl80211_associate(
2716         void *priv, struct wpa_driver_associate_params *params)
2717 {
2718         struct wpa_driver_nl80211_data *drv = priv;
2719         int ret = -1;
2720         struct nl_msg *msg;
2721
2722 #ifdef CONFIG_AP
2723         if (params->mode == 2)
2724                 return wpa_driver_nl80211_ap(drv, params);
2725 #endif /* CONFIG_AP */
2726
2727         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2728                                           params->drop_unencrypted);
2729
2730         drv->associated = 0;
2731
2732         msg = nlmsg_alloc();
2733         if (!msg)
2734                 return -1;
2735
2736         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2737                    drv->ifindex);
2738         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2739                     NL80211_CMD_ASSOCIATE, 0);
2740
2741         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2742         if (params->bssid) {
2743                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2744                            MAC2STR(params->bssid));
2745                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2746         }
2747         if (params->freq) {
2748                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2749                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2750         }
2751         if (params->ssid) {
2752                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2753                                   params->ssid, params->ssid_len);
2754                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2755                         params->ssid);
2756                 if (params->ssid_len > sizeof(drv->ssid))
2757                         goto nla_put_failure;
2758                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2759                 drv->ssid_len = params->ssid_len;
2760         }
2761         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
2762         if (params->wpa_ie)
2763                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2764                         params->wpa_ie);
2765
2766         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2767         msg = NULL;
2768         if (ret) {
2769                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2770                            "(%s)", ret, strerror(-ret));
2771                 goto nla_put_failure;
2772         }
2773         ret = 0;
2774         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2775                    "successfully");
2776
2777 nla_put_failure:
2778         nlmsg_free(msg);
2779         return ret;
2780 }
2781
2782
2783 /**
2784  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2785  * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2786  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2787  * Returns: 0 on success, -1 on failure
2788  */
2789 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2790                                        int mode)
2791 {
2792         int ret = -1;
2793         struct nl_msg *msg;
2794         int nlmode;
2795
2796         switch (mode) {
2797         case 0:
2798                 nlmode = NL80211_IFTYPE_STATION;
2799                 break;
2800         case 1:
2801                 nlmode = NL80211_IFTYPE_ADHOC;
2802                 break;
2803         case 2:
2804                 nlmode = NL80211_IFTYPE_AP;
2805                 break;
2806         default:
2807                 return -1;
2808         }
2809
2810         msg = nlmsg_alloc();
2811         if (!msg)
2812                 return -1;
2813
2814         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2815                     0, NL80211_CMD_SET_INTERFACE, 0);
2816         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2817         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2818
2819         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2820         if (!ret)
2821                 return 0;
2822         else
2823                 goto try_again;
2824
2825 nla_put_failure:
2826         wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2827                    ret, strerror(-ret));
2828         return -1;
2829
2830 try_again:
2831         /* mac80211 doesn't allow mode changes while the device is up, so
2832          * take the device down, try to set the mode again, and bring the
2833          * device back up.
2834          */
2835         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2836                 /* Try to set the mode again while the interface is down */
2837                 msg = nlmsg_alloc();
2838                 if (!msg)
2839                         return -1;
2840
2841                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2842                             0, NL80211_CMD_SET_INTERFACE, 0);
2843                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2844                 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2845                 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2846                 if (ret) {
2847                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
2848                                    "mode(try_again): %d (%s)",
2849                                    drv->ifname, ret, strerror(-ret));
2850                 }
2851
2852                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2853                         ret = -1;
2854         }
2855
2856         return ret;
2857 }
2858
2859
2860 static int wpa_driver_nl80211_get_capa(void *priv,
2861                                        struct wpa_driver_capa *capa)
2862 {
2863         struct wpa_driver_nl80211_data *drv = priv;
2864         if (!drv->has_capability)
2865                 return -1;
2866         os_memcpy(capa, &drv->capa, sizeof(*capa));
2867         return 0;
2868 }
2869
2870
2871 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2872 {
2873         struct wpa_driver_nl80211_data *drv = priv;
2874
2875         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2876                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2877         drv->operstate = state;
2878         return wpa_driver_nl80211_send_oper_ifla(
2879                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2880 }
2881
2882
2883 #ifdef HOSTAPD
2884
2885 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2886
2887 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2888 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2889
2890
2891 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2892                                  int ifindex)
2893 {
2894         struct i802_bss *bss = &drv->bss;
2895         while (bss) {
2896                 if (ifindex == bss->ifindex)
2897                         return bss;
2898                 bss = bss->next;
2899         }
2900         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
2901         return NULL;
2902 }
2903
2904
2905 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2906 {
2907         int i;
2908         int *old;
2909
2910         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
2911                    ifidx);
2912         for (i = 0; i < drv->num_if_indices; i++) {
2913                 if (drv->if_indices[i] == 0) {
2914                         drv->if_indices[i] = ifidx;
2915                         return;
2916                 }
2917         }
2918
2919         if (drv->if_indices != drv->default_if_indices)
2920                 old = drv->if_indices;
2921         else
2922                 old = NULL;
2923
2924         drv->if_indices = realloc(old,
2925                                   sizeof(int) * (drv->num_if_indices + 1));
2926         if (!drv->if_indices) {
2927                 if (!old)
2928                         drv->if_indices = drv->default_if_indices;
2929                 else
2930                         drv->if_indices = old;
2931                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
2932                            "interfaces");
2933                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
2934                 return;
2935         }
2936         drv->if_indices[drv->num_if_indices] = ifidx;
2937         drv->num_if_indices++;
2938 }
2939
2940
2941 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2942 {
2943         int i;
2944
2945         for (i = 0; i < drv->num_if_indices; i++) {
2946                 if (drv->if_indices[i] == ifidx) {
2947                         drv->if_indices[i] = 0;
2948                         break;
2949                 }
2950         }
2951 }
2952
2953
2954 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2955 {
2956         int i;
2957
2958         for (i = 0; i < drv->num_if_indices; i++)
2959                 if (drv->if_indices[i] == ifidx)
2960                         return 1;
2961
2962         return 0;
2963 }
2964
2965
2966 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
2967                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
2968                         size_t seq_len, const u8 *key, size_t key_len)
2969 {
2970         struct wpa_driver_nl80211_data *drv = priv;
2971         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
2972                            set_tx, seq, seq_len, key, key_len);
2973 }
2974
2975
2976 static inline int min_int(int a, int b)
2977 {
2978         if (a < b)
2979                 return a;
2980         return b;
2981 }
2982
2983
2984 static int get_key_handler(struct nl_msg *msg, void *arg)
2985 {
2986         struct nlattr *tb[NL80211_ATTR_MAX + 1];
2987         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2988
2989         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2990                   genlmsg_attrlen(gnlh, 0), NULL);
2991
2992         /*
2993          * TODO: validate the key index and mac address!
2994          * Otherwise, there's a race condition as soon as
2995          * the kernel starts sending key notifications.
2996          */
2997
2998         if (tb[NL80211_ATTR_KEY_SEQ])
2999                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3000                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3001         return NL_SKIP;
3002 }
3003
3004
3005 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3006                            int idx, u8 *seq)
3007 {
3008         struct wpa_driver_nl80211_data *drv = priv;
3009         struct nl_msg *msg;
3010
3011         msg = nlmsg_alloc();
3012         if (!msg)
3013                 return -ENOMEM;
3014
3015         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3016                     0, NL80211_CMD_GET_KEY, 0);
3017
3018         if (addr)
3019                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3020         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3021         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3022
3023         memset(seq, 0, 6);
3024
3025         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3026  nla_put_failure:
3027         return -ENOBUFS;
3028 }
3029
3030
3031 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3032                               int mode)
3033 {
3034         struct wpa_driver_nl80211_data *drv = priv;
3035         struct nl_msg *msg;
3036         u8 rates[NL80211_MAX_SUPP_RATES];
3037         u8 rates_len = 0;
3038         int i;
3039
3040         msg = nlmsg_alloc();
3041         if (!msg)
3042                 return -ENOMEM;
3043
3044         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3045                     NL80211_CMD_SET_BSS, 0);
3046
3047         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3048                 rates[rates_len++] = basic_rates[i] / 5;
3049
3050         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3051
3052         /* TODO: multi-BSS support */
3053         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3054
3055         return send_and_recv_msgs(drv, msg, NULL, NULL);
3056  nla_put_failure:
3057         return -ENOBUFS;
3058 }
3059
3060
3061 /* Set kernel driver on given frequency (MHz) */
3062 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3063 {
3064         struct wpa_driver_nl80211_data *drv = priv;
3065         struct nl_msg *msg;
3066
3067         msg = nlmsg_alloc();
3068         if (!msg)
3069                 return -1;
3070
3071         drv->last_freq = freq->freq;
3072         drv->last_freq_ht = freq->ht_enabled;
3073
3074         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3075                     NL80211_CMD_SET_WIPHY, 0);
3076
3077         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3078         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq);
3079         if (freq->ht_enabled) {
3080                 switch (freq->sec_channel_offset) {
3081                 case -1:
3082                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3083                                     NL80211_CHAN_HT40MINUS);
3084                         break;
3085                 case 1:
3086                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3087                                     NL80211_CHAN_HT40PLUS);
3088                         break;
3089                 default:
3090                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3091                                     NL80211_CHAN_HT20);
3092                         break;
3093                 }
3094         }
3095
3096         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3097                 return 0;
3098  nla_put_failure:
3099         return -1;
3100 }
3101
3102
3103 static int i802_set_rts(void *priv, int rts)
3104 {
3105         struct wpa_driver_nl80211_data *drv = priv;
3106         struct iwreq iwr;
3107
3108         memset(&iwr, 0, sizeof(iwr));
3109         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3110         iwr.u.rts.value = rts;
3111         iwr.u.rts.fixed = 1;
3112
3113         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3114                 perror("ioctl[SIOCSIWRTS]");
3115                 return -1;
3116         }
3117
3118         return 0;
3119 }
3120
3121
3122 static int i802_set_frag(void *priv, int frag)
3123 {
3124         struct wpa_driver_nl80211_data *drv = priv;
3125         struct iwreq iwr;
3126
3127         memset(&iwr, 0, sizeof(iwr));
3128         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3129         iwr.u.frag.value = frag;
3130         iwr.u.frag.fixed = 1;
3131
3132         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3133                 perror("ioctl[SIOCSIWFRAG]");
3134                 return -1;
3135         }
3136
3137         return 0;
3138 }
3139
3140
3141 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3142 {
3143         struct wpa_driver_nl80211_data *drv = priv;
3144         struct iwreq iwr;
3145
3146         memset(&iwr, 0, sizeof(iwr));
3147         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3148
3149         iwr.u.retry.value = short_retry;
3150         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3151         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3152                 perror("ioctl[SIOCSIWRETRY(short)]");
3153                 return -1;
3154         }
3155
3156         iwr.u.retry.value = long_retry;
3157         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3158         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3159                 perror("ioctl[SIOCSIWRETRY(long)]");
3160                 return -1;
3161         }
3162
3163         return 0;
3164 }
3165
3166
3167 static int i802_flush(void *priv)
3168 {
3169         struct wpa_driver_nl80211_data *drv = priv;
3170         struct nl_msg *msg;
3171
3172         msg = nlmsg_alloc();
3173         if (!msg)
3174                 return -1;
3175
3176         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3177                     0, NL80211_CMD_DEL_STATION, 0);
3178
3179         /*
3180          * XXX: FIX! this needs to flush all VLANs too
3181          */
3182         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3183                     if_nametoindex(drv->ifname));
3184
3185         return send_and_recv_msgs(drv, msg, NULL, NULL);
3186  nla_put_failure:
3187         return -ENOBUFS;
3188 }
3189
3190
3191 static int get_sta_handler(struct nl_msg *msg, void *arg)
3192 {
3193         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3194         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3195         struct hostap_sta_driver_data *data = arg;
3196         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3197         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3198                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3199                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3200                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3201                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3202                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3203         };
3204
3205         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3206                   genlmsg_attrlen(gnlh, 0), NULL);
3207
3208         /*
3209          * TODO: validate the interface and mac address!
3210          * Otherwise, there's a race condition as soon as
3211          * the kernel starts sending station notifications.
3212          */
3213
3214         if (!tb[NL80211_ATTR_STA_INFO]) {
3215                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3216                 return NL_SKIP;
3217         }
3218         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3219                              tb[NL80211_ATTR_STA_INFO],
3220                              stats_policy)) {
3221                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3222                 return NL_SKIP;
3223         }
3224
3225         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3226                 data->inactive_msec =
3227                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3228         if (stats[NL80211_STA_INFO_RX_BYTES])
3229                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3230         if (stats[NL80211_STA_INFO_TX_BYTES])
3231                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3232         if (stats[NL80211_STA_INFO_RX_PACKETS])
3233                 data->rx_packets =
3234                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3235         if (stats[NL80211_STA_INFO_TX_PACKETS])
3236                 data->tx_packets =
3237                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3238
3239         return NL_SKIP;
3240 }
3241
3242 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3243                               const u8 *addr)
3244 {
3245         struct wpa_driver_nl80211_data *drv = priv;
3246         struct nl_msg *msg;
3247
3248         os_memset(data, 0, sizeof(*data));
3249         msg = nlmsg_alloc();
3250         if (!msg)
3251                 return -ENOMEM;
3252
3253         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3254                     0, NL80211_CMD_GET_STATION, 0);
3255
3256         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3257         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3258
3259         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3260  nla_put_failure:
3261         return -ENOBUFS;
3262 }
3263
3264
3265 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3266                            size_t data_len, int encrypt, const u8 *own_addr)
3267 {
3268         struct wpa_driver_nl80211_data *drv = priv;
3269         struct ieee80211_hdr *hdr;
3270         size_t len;
3271         u8 *pos;
3272         int res;
3273 #if 0 /* FIX */
3274         int qos = sta->flags & WLAN_STA_WME;
3275 #else
3276         int qos = 0;
3277 #endif
3278
3279         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3280                 data_len;
3281         hdr = os_zalloc(len);
3282         if (hdr == NULL) {
3283                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3284                        (unsigned long) len);
3285                 return -1;
3286         }
3287
3288         hdr->frame_control =
3289                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3290         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3291         if (encrypt)
3292                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3293 #if 0 /* To be enabled if qos determination is added above */
3294         if (qos) {
3295                 hdr->frame_control |=
3296                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3297         }
3298 #endif
3299
3300         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3301         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3302         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3303         pos = (u8 *) (hdr + 1);
3304
3305 #if 0 /* To be enabled if qos determination is added above */
3306         if (qos) {
3307                 /* add an empty QoS header if needed */
3308                 pos[0] = 0;
3309                 pos[1] = 0;
3310                 pos += 2;
3311         }
3312 #endif
3313
3314         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3315         pos += sizeof(rfc1042_header);
3316         WPA_PUT_BE16(pos, ETH_P_PAE);
3317         pos += 2;
3318         memcpy(pos, data, data_len);
3319
3320         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3321         if (res < 0) {
3322                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3323                            "failed: %d (%s)",
3324                            (unsigned long) len, errno, strerror(errno));
3325         }
3326         free(hdr);
3327
3328         return res;
3329 }
3330
3331
3332 static int i802_sta_add(const char *ifname, void *priv,
3333                         struct hostapd_sta_add_params *params)
3334 {
3335         struct wpa_driver_nl80211_data *drv = priv;
3336         struct nl_msg *msg;
3337         int ret = -ENOBUFS;
3338
3339         msg = nlmsg_alloc();
3340         if (!msg)
3341                 return -ENOMEM;
3342
3343         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3344                     0, NL80211_CMD_NEW_STATION, 0);
3345
3346         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3347                     if_nametoindex(drv->ifname));
3348         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3349         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3350         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3351                 params->supp_rates);
3352         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3353                     params->listen_interval);
3354
3355 #ifdef CONFIG_IEEE80211N
3356         if (params->ht_capabilities) {
3357                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3358                         params->ht_capabilities->length,
3359                         &params->ht_capabilities->data);
3360         }
3361 #endif /* CONFIG_IEEE80211N */
3362
3363         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3364         if (ret)
3365                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3366                            "result: %d (%s)", ret, strerror(-ret));
3367         if (ret == -EEXIST)
3368                 ret = 0;
3369  nla_put_failure:
3370         return ret;
3371 }
3372
3373
3374 static int i802_sta_remove(void *priv, const u8 *addr)
3375 {
3376         struct wpa_driver_nl80211_data *drv = priv;
3377         struct nl_msg *msg;
3378         int ret;
3379
3380         msg = nlmsg_alloc();
3381         if (!msg)
3382                 return -ENOMEM;
3383
3384         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3385                     0, NL80211_CMD_DEL_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         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3392         if (ret == -ENOENT)
3393                 return 0;
3394         return ret;
3395  nla_put_failure:
3396         return -ENOBUFS;
3397 }
3398
3399
3400 static int i802_sta_set_flags(void *priv, const u8 *addr,
3401                               int total_flags, int flags_or, int flags_and)
3402 {
3403         struct wpa_driver_nl80211_data *drv = priv;
3404         struct nl_msg *msg, *flags = NULL;
3405
3406         msg = nlmsg_alloc();
3407         if (!msg)
3408                 return -ENOMEM;
3409
3410         flags = nlmsg_alloc();
3411         if (!flags) {
3412                 nlmsg_free(msg);
3413                 return -ENOMEM;
3414         }
3415
3416         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3417                     0, NL80211_CMD_SET_STATION, 0);
3418
3419         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3420                     if_nametoindex(drv->ifname));
3421         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3422
3423         if (total_flags & WLAN_STA_AUTHORIZED)
3424                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3425
3426         if (total_flags & WLAN_STA_WMM)
3427                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3428
3429         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3430                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3431
3432         if (total_flags & WLAN_STA_MFP)
3433                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3434
3435         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3436                 goto nla_put_failure;
3437
3438         nlmsg_free(flags);
3439
3440         return send_and_recv_msgs(drv, msg, NULL, NULL);
3441  nla_put_failure:
3442         nlmsg_free(flags);
3443         return -ENOBUFS;
3444 }
3445
3446
3447 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3448                                     int cw_min, int cw_max, int burst_time)
3449 {
3450         struct wpa_driver_nl80211_data *drv = priv;
3451         struct nl_msg *msg;
3452         struct nlattr *txq, *params;
3453
3454         msg = nlmsg_alloc();
3455         if (!msg)
3456                 return -1;
3457
3458         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3459                     0, NL80211_CMD_SET_WIPHY, 0);
3460
3461         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3462
3463         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3464         if (!txq)
3465                 goto nla_put_failure;
3466
3467         /* We are only sending parameters for a single TXQ at a time */
3468         params = nla_nest_start(msg, 1);
3469         if (!params)
3470                 goto nla_put_failure;
3471
3472         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3473         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3474          * 32 usec, so need to convert the value here. */
3475         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3476         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3477         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3478         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3479
3480         nla_nest_end(msg, params);
3481
3482         nla_nest_end(msg, txq);
3483
3484         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3485                 return 0;
3486  nla_put_failure:
3487         return -1;
3488 }
3489
3490
3491 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3492 {
3493         struct wpa_driver_nl80211_data *drv = priv;
3494         int ifidx;
3495         struct i802_bss *bss;
3496
3497         bss = os_zalloc(sizeof(*bss));
3498         if (bss == NULL)
3499                 return -1;
3500         bss->ifindex = if_nametoindex(ifname);
3501
3502         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3503         if (ifidx < 0) {
3504                 os_free(bss);
3505                 return -1;
3506         }
3507         if (hostapd_set_iface_flags(priv, ifname, 1)) {
3508                 nl80211_remove_iface(priv, ifidx);
3509                 os_free(bss);
3510                 return -1;
3511         }
3512         bss->next = drv->bss.next;
3513         drv->bss.next = bss;
3514         return 0;
3515 }
3516
3517
3518 static int i802_bss_remove(void *priv, const char *ifname)
3519 {
3520         struct wpa_driver_nl80211_data *drv = priv;
3521         struct i802_bss *bss, *prev;
3522         int ifindex = if_nametoindex(ifname);
3523         nl80211_remove_iface(priv, ifindex);
3524         prev = &drv->bss;
3525         bss = drv->bss.next;
3526         while (bss) {
3527                 if (ifindex == bss->ifindex) {
3528                         prev->next = bss->next;
3529                         os_free(bss);
3530                         break;
3531                 }
3532                 prev = bss;
3533                 bss = bss->next;
3534         }
3535         return 0;
3536 }
3537
3538
3539 static int i802_set_beacon(const char *iface, void *priv,
3540                            const u8 *head, size_t head_len,
3541                            const u8 *tail, size_t tail_len, int dtim_period)
3542 {
3543         return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3544                                                    head, head_len,
3545                                                    tail, tail_len,
3546                                                    dtim_period);
3547 }
3548
3549
3550 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3551 {
3552         struct nl_msg *msg;
3553
3554         msg = nlmsg_alloc();
3555         if (!msg)
3556                 return -ENOMEM;
3557
3558         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3559                     0, NL80211_CMD_DEL_BEACON, 0);
3560         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3561
3562         return send_and_recv_msgs(drv, msg, NULL, NULL);
3563  nla_put_failure:
3564         return -ENOBUFS;
3565 }
3566
3567
3568 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3569 {
3570         struct wpa_driver_nl80211_data *drv = priv;
3571         struct nl_msg *msg;
3572
3573         msg = nlmsg_alloc();
3574         if (!msg)
3575                 return -ENOMEM;
3576
3577         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3578                     NL80211_CMD_SET_BSS, 0);
3579
3580         if (cts >= 0)
3581                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3582         if (preamble >= 0)
3583                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3584         if (slot >= 0)
3585                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3586
3587         /* TODO: multi-BSS support */
3588         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3589
3590         return send_and_recv_msgs(drv, msg, NULL, NULL);
3591  nla_put_failure:
3592         return -ENOBUFS;
3593 }
3594
3595
3596 static int i802_set_cts_protect(void *priv, int value)
3597 {
3598         return i802_set_bss(priv, value, -1, -1);
3599 }
3600
3601
3602 static int i802_set_preamble(void *priv, int value)
3603 {
3604         return i802_set_bss(priv, -1, value, -1);
3605 }
3606
3607
3608 static int i802_set_short_slot_time(void *priv, int value)
3609 {
3610         return i802_set_bss(priv, -1, -1, value);
3611 }
3612
3613
3614 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3615 {
3616         switch (type) {
3617         case HOSTAPD_IF_VLAN:
3618                 return NL80211_IFTYPE_AP_VLAN;
3619         case HOSTAPD_IF_WDS:
3620                 return NL80211_IFTYPE_WDS;
3621         }
3622         return -1;
3623 }
3624
3625
3626 static int i802_if_add(const char *iface, void *priv,
3627                        enum hostapd_driver_if_type type, char *ifname,
3628                        const u8 *addr)
3629 {
3630         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3631                 return -1;
3632         return 0;
3633 }
3634
3635
3636 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3637                           char *ifname, const u8 *addr)
3638 {
3639         /* unused at the moment */
3640         return -1;
3641 }
3642
3643
3644 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3645                           const char *ifname, const u8 *addr)
3646 {
3647         nl80211_remove_iface(priv, if_nametoindex(ifname));
3648         return 0;
3649 }
3650
3651
3652 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3653                              const char *ifname, int vlan_id)
3654 {
3655         struct wpa_driver_nl80211_data *drv = priv;
3656         struct nl_msg *msg;
3657
3658         msg = nlmsg_alloc();
3659         if (!msg)
3660                 return -ENOMEM;
3661
3662         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3663                     0, NL80211_CMD_SET_STATION, 0);
3664
3665         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3666                     if_nametoindex(drv->ifname));
3667         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3668         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3669                     if_nametoindex(ifname));
3670
3671         return send_and_recv_msgs(drv, msg, NULL, NULL);
3672  nla_put_failure:
3673         return -ENOBUFS;
3674 }
3675
3676
3677 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3678                          u8 *buf, size_t len,
3679                          struct hostapd_frame_info *hfi,
3680                          enum ieee80211_msg_type msg_type)
3681 {
3682         struct hostapd_iface *iface = drv->hapd->iface;
3683         struct ieee80211_hdr *hdr;
3684         u16 fc, type, stype;
3685         size_t data_len = len;
3686         struct hostapd_data *hapd = NULL;
3687         int broadcast_bssid = 0;
3688         size_t i;
3689         u8 *bssid;
3690
3691         /*
3692          * PS-Poll frames are 16 bytes. All other frames are
3693          * 24 bytes or longer.
3694          */
3695         if (len < 16)
3696                 return;
3697
3698         hdr = (struct ieee80211_hdr *) buf;
3699         fc = le_to_host16(hdr->frame_control);
3700
3701         type = WLAN_FC_GET_TYPE(fc);
3702         stype = WLAN_FC_GET_STYPE(fc);
3703
3704         switch (type) {
3705         case WLAN_FC_TYPE_DATA:
3706                 if (len < 24)
3707                         return;
3708                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
3709                 case WLAN_FC_TODS:
3710                         bssid = hdr->addr1;
3711                         break;
3712                 case WLAN_FC_FROMDS:
3713                         bssid = hdr->addr2;
3714                         break;
3715                 default:
3716                         /* discard */
3717                         return;
3718                 }
3719                 break;
3720         case WLAN_FC_TYPE_CTRL:
3721                 /* discard non-ps-poll frames */
3722                 if (stype != WLAN_FC_STYPE_PSPOLL)
3723                         return;
3724                 bssid = hdr->addr1;
3725                 break;
3726         case WLAN_FC_TYPE_MGMT:
3727                 bssid = hdr->addr3;
3728                 break;
3729         default:
3730                 /* discard */
3731                 return;
3732         }
3733
3734         /* find interface frame belongs to */
3735         for (i = 0; i < iface->num_bss; i++) {
3736                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
3737                         hapd = iface->bss[i];
3738                         break;
3739                 }
3740         }
3741
3742         if (hapd == NULL) {
3743                 hapd = iface->bss[0];
3744
3745                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
3746                     bssid[2] != 0xff || bssid[3] != 0xff ||
3747                     bssid[4] != 0xff || bssid[5] != 0xff) {
3748                         /*
3749                          * Unknown BSSID - drop frame if this is not from
3750                          * passive scanning or a beacon (at least ProbeReq
3751                          * frames to other APs may be allowed through RX
3752                          * filtering in the wlan hw/driver)
3753                          */
3754                         if ((type != WLAN_FC_TYPE_MGMT ||
3755                              stype != WLAN_FC_STYPE_BEACON))
3756                                 return;
3757                 } else
3758                         broadcast_bssid = 1;
3759         }
3760
3761         switch (msg_type) {
3762         case ieee80211_msg_normal:
3763                 /* continue processing */
3764                 break;
3765         case ieee80211_msg_tx_callback_ack:
3766                 handle_tx_callback(hapd, buf, data_len, 1);
3767                 return;
3768         case ieee80211_msg_tx_callback_fail:
3769                 handle_tx_callback(hapd, buf, data_len, 0);
3770                 return;
3771         }
3772
3773         switch (type) {
3774         case WLAN_FC_TYPE_MGMT:
3775                 if (stype != WLAN_FC_STYPE_BEACON &&
3776                     stype != WLAN_FC_STYPE_PROBE_REQ)
3777                         wpa_printf(MSG_MSGDUMP, "MGMT");
3778                 if (broadcast_bssid) {
3779                         for (i = 0; i < iface->num_bss; i++)
3780                                 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
3781                                                 stype, hfi);
3782                 } else
3783                         hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
3784                 break;
3785         case WLAN_FC_TYPE_CTRL:
3786                 /* can only get here with PS-Poll frames */
3787                 wpa_printf(MSG_DEBUG, "CTRL");
3788                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3789                 break;
3790         case WLAN_FC_TYPE_DATA:
3791                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3792                 break;
3793         }
3794 }
3795
3796
3797 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3798 {
3799         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3800         struct sockaddr_ll lladdr;
3801         unsigned char buf[3000];
3802         int len;
3803         socklen_t fromlen = sizeof(lladdr);
3804
3805         len = recvfrom(sock, buf, sizeof(buf), 0,
3806                        (struct sockaddr *)&lladdr, &fromlen);
3807         if (len < 0) {
3808                 perror("recv");
3809                 return;
3810         }
3811
3812         if (have_ifidx(drv, lladdr.sll_ifindex)) {
3813                 struct hostapd_data *hapd;
3814                 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3815                 if (!hapd)
3816                         return;
3817                 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3818         }
3819 }
3820
3821
3822 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
3823                             int mode)
3824 {
3825         struct nl_msg *msg;
3826         int ret = -ENOBUFS;
3827
3828         msg = nlmsg_alloc();
3829         if (!msg)
3830                 return -ENOMEM;
3831
3832         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3833                     0, NL80211_CMD_SET_INTERFACE, 0);
3834         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3835                     if_nametoindex(ifname));
3836         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3837
3838         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3839         if (!ret)
3840                 return 0;
3841  nla_put_failure:
3842         wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
3843                    "mode.", ifname);
3844         return ret;
3845 }
3846
3847
3848 #ifdef CONFIG_IEEE80211N
3849 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
3850                               int freq, u8 *ie, size_t ie_len)
3851 {
3852         struct ieee802_11_elems elems;
3853         int ht, pri_chan = 0, sec_chan = 0;
3854         struct ieee80211_ht_operation *oper;
3855         struct hostapd_neighbor_bss *nnei;
3856
3857         ieee802_11_parse_elems(ie, ie_len, &elems, 0);
3858         ht = elems.ht_capabilities || elems.ht_operation;
3859         if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
3860                 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
3861                 pri_chan = oper->control_chan;
3862                 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
3863                         if (oper->ht_param &
3864                             HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
3865                                 sec_chan = pri_chan + 4;
3866                         else if (oper->ht_param &
3867                             HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
3868                                 sec_chan = pri_chan - 4;
3869                 }
3870         }
3871
3872         wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
3873                    " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
3874                    MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
3875
3876         nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
3877                           sizeof(struct hostapd_neighbor_bss));
3878         if (nnei == NULL)
3879                 return;
3880         drv->neighbors = nnei;
3881         nnei = &nnei[drv->num_neighbors];
3882         os_memcpy(nnei->bssid, bssid, ETH_ALEN);
3883         nnei->freq = freq;
3884         nnei->ht = !!ht;
3885         nnei->pri_chan = pri_chan;
3886         nnei->sec_chan = sec_chan;
3887         drv->num_neighbors++;
3888 }
3889
3890
3891 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
3892 {
3893         int divi = 1000000, i;
3894
3895         if (iwe->u.freq.e == 0) {
3896                 /*
3897                  * Some drivers do not report frequency, but a channel.
3898                  * Try to map this to frequency by assuming they are using
3899                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
3900                  * frequency if the driver sends both frequency and channel,
3901                  * since the driver may be sending an A-band channel that we
3902                  * don't handle here.
3903                  */
3904
3905                 if (*freq)
3906                         return 0;
3907
3908                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
3909                         *freq = 2407 + 5 * iwe->u.freq.m;
3910                         return 0;
3911                 } else if (iwe->u.freq.m == 14) {
3912                         *freq = 2484;
3913                         return 0;
3914                 }
3915         }
3916
3917         if (iwe->u.freq.e > 6) {
3918                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
3919                            "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
3920                 return -1;
3921         }
3922
3923         for (i = 0; i < iwe->u.freq.e; i++)
3924                 divi /= 10;
3925         *freq = iwe->u.freq.m / divi;
3926         return 0;
3927 }
3928
3929
3930 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
3931                            size_t len)
3932 {
3933         size_t ap_num = 0;
3934         int first;
3935         struct iw_event iwe_buf, *iwe = &iwe_buf;
3936         char *pos, *end, *custom;
3937         u8 bssid[ETH_ALEN];
3938         int freq = 0;
3939         u8 *ie = NULL;
3940         size_t ie_len = 0;
3941
3942         ap_num = 0;
3943         first = 1;
3944
3945         pos = (char *) res_buf;
3946         end = (char *) res_buf + len;
3947
3948         while (pos + IW_EV_LCP_LEN <= end) {
3949                 /* Event data may be unaligned, so make a local, aligned copy
3950                  * before processing. */
3951                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
3952                 if (iwe->len <= IW_EV_LCP_LEN)
3953                         break;
3954
3955                 custom = pos + IW_EV_POINT_LEN;
3956                 if (iwe->cmd == IWEVGENIE) {
3957                         /* WE-19 removed the pointer from struct iw_point */
3958                         char *dpos = (char *) &iwe_buf.u.data.length;
3959                         int dlen = dpos - (char *) &iwe_buf;
3960                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
3961                                   sizeof(struct iw_event) - dlen);
3962                 } else {
3963                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
3964                         custom += IW_EV_POINT_OFF;
3965                 }
3966
3967                 switch (iwe->cmd) {
3968                 case SIOCGIWAP:
3969                         if (!first)
3970                                 i802_add_neighbor(drv, bssid, freq, ie,
3971                                                   ie_len);
3972                         first = 0;
3973                         os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
3974                         freq = 0;
3975                         ie = NULL;
3976                         ie_len = 0;
3977                         break;
3978                 case SIOCGIWFREQ:
3979                         i802_get_scan_freq(iwe, &freq);
3980                         break;
3981                 case IWEVGENIE:
3982                         if (custom + iwe->u.data.length > end) {
3983                                 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
3984                                 return -1;
3985                         }
3986                         ie = (u8 *) custom;
3987                         ie_len = iwe->u.data.length;
3988                         break;
3989                 }
3990
3991                 pos += iwe->len;
3992         }
3993
3994         if (!first)
3995                 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
3996
3997         return 0;
3998 }
3999
4000
4001 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
4002 {
4003         struct iwreq iwr;
4004         u8 *res_buf;
4005         size_t res_buf_len;
4006         int res;
4007
4008         res_buf_len = IW_SCAN_MAX_DATA;
4009         for (;;) {
4010                 res_buf = os_malloc(res_buf_len);
4011                 if (res_buf == NULL)
4012                         return -1;
4013                 os_memset(&iwr, 0, sizeof(iwr));
4014                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4015                 iwr.u.data.pointer = res_buf;
4016                 iwr.u.data.length = res_buf_len;
4017
4018                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
4019                         break;
4020
4021                 if (errno == E2BIG && res_buf_len < 65535) {
4022                         os_free(res_buf);
4023                         res_buf = NULL;
4024                         res_buf_len *= 2;
4025                         if (res_buf_len > 65535)
4026                                 res_buf_len = 65535; /* 16-bit length field */
4027                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
4028                                    "trying larger buffer (%lu bytes)",
4029                                    (unsigned long) res_buf_len);
4030                 } else {
4031                         perror("ioctl[SIOCGIWSCAN]");
4032                         os_free(res_buf);
4033                         return -1;
4034                 }
4035         }
4036
4037         if (iwr.u.data.length > res_buf_len) {
4038                 os_free(res_buf);
4039                 return -1;
4040         }
4041
4042         res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
4043         os_free(res_buf);
4044
4045         return res;
4046 }
4047
4048
4049 static int i802_is_event_wireless_scan_complete(char *data, int len)
4050 {
4051         struct iw_event iwe_buf, *iwe = &iwe_buf;
4052         char *pos, *end;
4053
4054         pos = data;
4055         end = data + len;
4056
4057         while (pos + IW_EV_LCP_LEN <= end) {
4058                 /* Event data may be unaligned, so make a local, aligned copy
4059                  * before processing. */
4060                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4061                 if (iwe->cmd == SIOCGIWSCAN)
4062                         return 1;
4063
4064                 pos += iwe->len;
4065         }
4066
4067         return 0;
4068 }
4069
4070
4071 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4072 {
4073         struct ifinfomsg *ifi;
4074         int attrlen, _nlmsg_len, rta_len;
4075         struct rtattr *attr;
4076
4077         if (len < (int) sizeof(*ifi))
4078                 return 0;
4079
4080         ifi = NLMSG_DATA(h);
4081
4082         if (ifindex != ifi->ifi_index)
4083                 return 0; /* event for foreign ifindex */
4084
4085         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4086
4087         attrlen = h->nlmsg_len - _nlmsg_len;
4088         if (attrlen < 0)
4089                 return 0;
4090
4091         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4092
4093         rta_len = RTA_ALIGN(sizeof(struct rtattr));
4094         while (RTA_OK(attr, attrlen)) {
4095                 if (attr->rta_type == IFLA_WIRELESS &&
4096                     i802_is_event_wireless_scan_complete(
4097                             ((char *) attr) + rta_len,
4098                             attr->rta_len - rta_len))
4099                         return 1;
4100                 attr = RTA_NEXT(attr, attrlen);
4101         }
4102
4103         return 0;
4104 }
4105
4106
4107 static int i802_is_scan_complete(int s, int ifindex)
4108 {
4109         char buf[1024];
4110         int left;
4111         struct nlmsghdr *h;
4112
4113         left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4114         if (left < 0) {
4115                 perror("recv(netlink)");
4116                 return 0;
4117         }
4118
4119         h = (struct nlmsghdr *) buf;
4120         while (left >= (int) sizeof(*h)) {
4121                 int len, plen;
4122
4123                 len = h->nlmsg_len;
4124                 plen = len - sizeof(*h);
4125                 if (len > left || plen < 0) {
4126                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4127                                    "len=%d left=%d plen=%d",
4128                                    len, left, plen);
4129                         break;
4130                 }
4131
4132                 switch (h->nlmsg_type) {
4133                 case RTM_NEWLINK:
4134                         if (i802_is_rtm_scan_complete(ifindex, h, plen))
4135                                 return 1;
4136                         break;
4137                 }
4138
4139                 len = NLMSG_ALIGN(len);
4140                 left -= len;
4141                 h = (struct nlmsghdr *) ((char *) h + len);
4142         }
4143
4144         return 0;
4145 }
4146
4147
4148 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4149 {
4150         struct iwreq iwr;
4151         int s, res, ifindex;
4152         struct sockaddr_nl local;
4153         time_t now, end;
4154         fd_set rfds;
4155         struct timeval tv;
4156
4157         wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4158                    "starting HT 20/40 MHz BSS");
4159
4160         /* Request a new scan */
4161         /* TODO: would be enough to scan the selected band */
4162         os_memset(&iwr, 0, sizeof(iwr));
4163         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4164         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4165                 perror("ioctl[SIOCSIWSCAN]");
4166                 return -1;
4167         }
4168
4169         ifindex = if_nametoindex(drv->ifname);
4170
4171         /* Wait for scan completion event or timeout */
4172         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4173         if (s < 0) {
4174                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4175                 return -1;
4176         }
4177
4178         os_memset(&local, 0, sizeof(local));
4179         local.nl_family = AF_NETLINK;
4180         local.nl_groups = RTMGRP_LINK;
4181         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
4182                 perror("bind(netlink)");
4183                 close(s);
4184                 return -1;
4185         }
4186
4187         time(&end);
4188         end += 30; /* Wait at most 30 seconds for scan results */
4189         for (;;) {
4190                 time(&now);
4191                 tv.tv_sec = end > now ? end - now : 0;
4192                 tv.tv_usec = 0;
4193                 FD_ZERO(&rfds);
4194                 FD_SET(s, &rfds);
4195                 res = select(s + 1, &rfds, NULL, NULL, &tv);
4196                 if (res < 0) {
4197                         perror("select");
4198                         /* Assume results are ready after 10 seconds wait */
4199                         os_sleep(10, 0);
4200                         break;
4201                 } else if (res) {
4202                         if (i802_is_scan_complete(s, ifindex)) {
4203                                 wpa_printf(MSG_DEBUG, "nl80211: Scan "
4204                                            "completed");
4205                                 break;
4206                         }
4207                 } else {
4208                         wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
4209                         /* Assume results are ready to be read now */
4210                         break;
4211                 }
4212         }
4213
4214         close(s);
4215
4216         return i802_get_ht_scan_res(drv);
4217 }
4218 #endif /* CONFIG_IEEE80211N */
4219
4220
4221 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
4222 {
4223         struct ifreq ifr;
4224         int ret;
4225
4226         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
4227         if (drv->ioctl_sock < 0) {
4228                 perror("socket[PF_INET,SOCK_DGRAM]");
4229                 return -1;
4230         }
4231
4232         /* start listening for EAPOL on the default AP interface */
4233         add_ifidx(drv, if_nametoindex(drv->ifname));
4234
4235         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4236                 return -1;
4237
4238         if (bssid) {
4239                 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
4240                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
4241                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
4242
4243                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
4244                         perror("ioctl(SIOCSIFHWADDR)");
4245                         return -1;
4246                 }
4247         }
4248
4249         /*
4250          * initialise generic netlink and nl80211
4251          */
4252         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
4253         if (!drv->nl_cb) {
4254                 printf("Failed to allocate netlink callbacks.\n");
4255                 return -1;
4256         }
4257
4258         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
4259         if (!drv->nl_handle) {
4260                 printf("Failed to allocate netlink handle.\n");
4261                 return -1;
4262         }
4263
4264         if (genl_connect(drv->nl_handle)) {
4265                 printf("Failed to connect to generic netlink.\n");
4266                 return -1;
4267         }
4268
4269 #ifdef CONFIG_LIBNL20
4270         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
4271                 printf("Failed to allocate generic netlink cache.\n");
4272                 return -1;
4273         }
4274 #else /* CONFIG_LIBNL20 */
4275         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
4276         if (!drv->nl_cache) {
4277                 printf("Failed to allocate generic netlink cache.\n");
4278                 return -1;
4279         }
4280 #endif /* CONFIG_LIBNL20 */
4281
4282         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
4283         if (!drv->nl80211) {
4284                 printf("nl80211 not found.\n");
4285                 return -1;
4286         }
4287
4288         ret = nl_get_multicast_id(drv, "nl80211", "scan");
4289         if (ret >= 0)
4290                 ret = nl_socket_add_membership(drv->nl_handle, ret);
4291         if (ret < 0) {
4292                 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4293                            "membership for scan events: %d (%s)",
4294                            ret, strerror(-ret));
4295         }
4296
4297         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
4298         if (ret >= 0)
4299                 ret = nl_socket_add_membership(drv->nl_handle, ret);
4300         if (ret < 0) {
4301                 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4302                            "membership for mlme events: %d (%s)",
4303                            ret, strerror(-ret));
4304         }
4305
4306         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
4307                                  wpa_driver_nl80211_event_receive, drv,
4308                                  drv->hapd);
4309
4310 #ifdef CONFIG_IEEE80211N
4311         if (drv->ht_40mhz_scan) {
4312                 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
4313                     || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
4314                     i802_ht_scan(drv) ||
4315                     hostapd_set_iface_flags(drv, drv->ifname, 0)) {
4316                         wpa_printf(MSG_ERROR, "Failed to scan channels for "
4317                                    "HT 40 MHz operations");
4318                         return -1;
4319                 }
4320         }
4321 #endif /* CONFIG_IEEE80211N */
4322
4323         /* Initialise a monitor interface */
4324         if (nl80211_create_monitor_interface(drv))
4325                 return -1;
4326
4327         if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
4328                 goto fail1;
4329
4330         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4331                 goto fail1;
4332
4333         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4334         if (drv->eapol_sock < 0) {
4335                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4336                 goto fail1;
4337         }
4338
4339         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4340         {
4341                 printf("Could not register read socket for eapol\n");
4342                 return -1;
4343         }
4344
4345         memset(&ifr, 0, sizeof(ifr));
4346         os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
4347         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
4348                 perror("ioctl(SIOCGIFHWADDR)");
4349                 goto fail1;
4350         }
4351
4352         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
4353                 printf("Invalid HW-addr family 0x%04x\n",
4354                        ifr.ifr_hwaddr.sa_family);
4355                 goto fail1;
4356         }
4357         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
4358
4359         return 0;
4360
4361 fail1:
4362         nl80211_remove_iface(drv, drv->monitor_ifidx);
4363         return -1;
4364 }
4365
4366
4367 static int i802_get_inact_sec(void *priv, const u8 *addr)
4368 {
4369         struct hostap_sta_driver_data data;
4370         int ret;
4371
4372         data.inactive_msec = (unsigned long) -1;
4373         ret = i802_read_sta_data(priv, &data, addr);
4374         if (ret || data.inactive_msec == (unsigned long) -1)
4375                 return -1;
4376         return data.inactive_msec / 1000;
4377 }
4378
4379
4380 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4381 {
4382 #if 0
4383         /* TODO */
4384 #endif
4385         return 0;
4386 }
4387
4388
4389 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
4390 {
4391         struct wpa_driver_nl80211_data *drv = priv;
4392         struct ieee80211_mgmt mgmt;
4393
4394         memset(&mgmt, 0, sizeof(mgmt));
4395         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4396                                           WLAN_FC_STYPE_DEAUTH);
4397         memcpy(mgmt.da, addr, ETH_ALEN);
4398         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4399         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4400         mgmt.u.deauth.reason_code = host_to_le16(reason);
4401         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4402                                             IEEE80211_HDRLEN +
4403                                             sizeof(mgmt.u.deauth));
4404 }
4405
4406
4407 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
4408 {
4409         struct wpa_driver_nl80211_data *drv = priv;
4410         struct ieee80211_mgmt mgmt;
4411
4412         memset(&mgmt, 0, sizeof(mgmt));
4413         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4414                                           WLAN_FC_STYPE_DISASSOC);
4415         memcpy(mgmt.da, addr, ETH_ALEN);
4416         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4417         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4418         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4419         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4420                                             IEEE80211_HDRLEN +
4421                                             sizeof(mgmt.u.disassoc));
4422 }
4423
4424
4425 static const struct hostapd_neighbor_bss *
4426 i802_get_neighbor_bss(void *priv, size_t *num)
4427 {
4428         struct wpa_driver_nl80211_data *drv = priv;
4429         *num = drv->num_neighbors;
4430         return drv->neighbors;
4431 }
4432
4433
4434 static void *i802_init(struct hostapd_data *hapd,
4435                        struct wpa_init_params *params)
4436 {
4437         struct wpa_driver_nl80211_data *drv;
4438         size_t i;
4439
4440         drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
4441         if (drv == NULL) {
4442                 printf("Could not allocate memory for i802 driver data\n");
4443                 return NULL;
4444         }
4445
4446         drv->hapd = hapd;
4447         memcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
4448         drv->ifindex = if_nametoindex(drv->ifname);
4449         drv->bss.ifindex = drv->ifindex;
4450
4451         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4452         drv->if_indices = drv->default_if_indices;
4453         for (i = 0; i < params->num_bridge; i++) {
4454                 if (params->bridge[i])
4455                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4456         }
4457         drv->ht_40mhz_scan = params->ht_40mhz_scan;
4458
4459         if (i802_init_sockets(drv, params->bssid))
4460                 goto failed;
4461
4462         return drv;
4463
4464 failed:
4465         free(drv);
4466         return NULL;
4467 }
4468
4469
4470 static void i802_deinit(void *priv)
4471 {
4472         struct wpa_driver_nl80211_data *drv = priv;
4473         struct i802_bss *bss, *prev;
4474
4475         if (drv->last_freq_ht) {
4476                 /* Clear HT flags from the driver */
4477                 struct hostapd_freq_params freq;
4478                 os_memset(&freq, 0, sizeof(freq));
4479                 freq.freq = drv->last_freq;
4480                 i802_set_freq(priv, &freq);
4481         }
4482
4483         i802_del_beacon(drv);
4484
4485         /* remove monitor interface */
4486         nl80211_remove_iface(drv, drv->monitor_ifidx);
4487
4488         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
4489
4490         if (drv->monitor_sock >= 0) {
4491                 eloop_unregister_read_sock(drv->monitor_sock);
4492                 close(drv->monitor_sock);
4493         }
4494         if (drv->ioctl_sock >= 0)
4495                 close(drv->ioctl_sock);
4496         if (drv->eapol_sock >= 0) {
4497                 eloop_unregister_read_sock(drv->eapol_sock);
4498                 close(drv->eapol_sock);
4499         }
4500
4501         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
4502         genl_family_put(drv->nl80211);
4503         nl_cache_free(drv->nl_cache);
4504         nl_handle_destroy(drv->nl_handle);
4505         nl_cb_put(drv->nl_cb);
4506
4507         if (drv->if_indices != drv->default_if_indices)
4508                 free(drv->if_indices);
4509
4510         os_free(drv->neighbors);
4511
4512         bss = drv->bss.next;
4513         while (bss) {
4514                 prev = bss;
4515                 bss = bss->next;
4516                 os_free(bss);
4517         }
4518
4519         free(drv);
4520 }
4521
4522 #endif /* HOSTAPD */
4523
4524
4525 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4526         .name = "nl80211",
4527         .desc = "Linux nl80211/cfg80211",
4528         .get_bssid = wpa_driver_nl80211_get_bssid,
4529         .get_ssid = wpa_driver_nl80211_get_ssid,
4530         .set_key = wpa_driver_nl80211_set_key,
4531         .scan2 = wpa_driver_nl80211_scan,
4532         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4533         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4534         .disassociate = wpa_driver_nl80211_disassociate,
4535         .authenticate = wpa_driver_nl80211_authenticate,
4536         .associate = wpa_driver_nl80211_associate,
4537         .init = wpa_driver_nl80211_init,
4538         .deinit = wpa_driver_nl80211_deinit,
4539         .get_capa = wpa_driver_nl80211_get_capa,
4540         .set_operstate = wpa_driver_nl80211_set_operstate,
4541         .set_country = wpa_driver_nl80211_set_country,
4542 #ifdef CONFIG_AP
4543         .set_beacon = wpa_driver_nl80211_set_beacon,
4544         .send_mlme = wpa_driver_nl80211_send_mlme,
4545 #endif /* CONFIG_AP */
4546 #if defined(CONFIG_AP) || defined(HOSTAPD)
4547         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4548         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4549 #endif /* CONFIG_AP || HOSTAPD */
4550 #ifdef HOSTAPD
4551         .hapd_init = i802_init,
4552         .hapd_deinit = i802_deinit,
4553         .hapd_set_key = i802_set_key,
4554         .get_seqnum = i802_get_seqnum,
4555         .flush = i802_flush,
4556         .read_sta_data = i802_read_sta_data,
4557         .hapd_send_eapol = i802_send_eapol,
4558         .sta_set_flags = i802_sta_set_flags,
4559         .sta_deauth = i802_sta_deauth,
4560         .sta_disassoc = i802_sta_disassoc,
4561         .sta_remove = i802_sta_remove,
4562         .sta_add = i802_sta_add,
4563         .get_inact_sec = i802_get_inact_sec,
4564         .sta_clear_stats = i802_sta_clear_stats,
4565         .set_freq = i802_set_freq,
4566         .set_rts = i802_set_rts,
4567         .set_frag = i802_set_frag,
4568         .set_retry = i802_set_retry,
4569         .set_rate_sets = i802_set_rate_sets,
4570         .hapd_set_beacon = i802_set_beacon,
4571         .set_cts_protect = i802_set_cts_protect,
4572         .set_preamble = i802_set_preamble,
4573         .set_short_slot_time = i802_set_short_slot_time,
4574         .set_tx_queue_params = i802_set_tx_queue_params,
4575         .bss_add = i802_bss_add,
4576         .bss_remove = i802_bss_remove,
4577         .if_add = i802_if_add,
4578         .if_update = i802_if_update,
4579         .if_remove = i802_if_remove,
4580         .set_sta_vlan = i802_set_sta_vlan,
4581         .get_neighbor_bss = i802_get_neighbor_bss,
4582 #endif /* HOSTAPD */
4583 };