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

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if_arp.h>
  22 #include <netlink/genl/genl.h>
  23 #include <netlink/genl/family.h>
  24 #include <netlink/genl/ctrl.h>
  25 #include "nl80211_copy.h"
  26 #include "wireless_copy.h"
  27
  28 #include "common.h"
  29 #include "driver.h"
  30 #include "eloop.h"
  31 #include "ieee802_11_defs.h"
  32
  33 #if defined(CONFIG_AP) || defined(HOSTAPD)
  34 #include <netpacket/packet.h>
  35 #include <linux/filter.h>
  36 #include "radiotap.h"
  37 #include "radiotap_iter.h"
  38 #endif /* CONFIG_AP || HOSTAPD */
  39
  40 #ifdef CONFIG_AP
  41
  42 #include "../hostapd/hostapd_defs.h"
  43
  44 #ifndef ETH_P_ALL
  45 #define ETH_P_ALL 0x0003
  46 #endif
  47
  48 #endif /* CONFIG_AP */
  49
  50 #ifdef HOSTAPD
  51 #include "../../hostapd/hostapd.h"
  52 #include "../../hostapd/sta_flags.h"
  53 #include "ieee802_11_common.h"
  54
  55 #ifdef CONFIG_LIBNL20
  56 /* libnl 2.0 compatibility code */
  57 #define nl_handle_alloc_cb nl_socket_alloc_cb
  58 #define nl_handle_destroy nl_socket_free
  59 #endif /* CONFIG_LIBNL20 */
  60
  61 #endif /* HOSTAPD */
  62
  63
  64 #ifndef IFF_LOWER_UP
  65 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  66 #endif
  67 #ifndef IFF_DORMANT
  68 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  69 #endif
  70
  71 #ifndef IF_OPER_DORMANT
  72 #define IF_OPER_DORMANT 5
  73 #endif
  74 #ifndef IF_OPER_UP
  75 #define IF_OPER_UP 6
  76 #endif
  77
  78 enum ieee80211_msg_type {
  79         ieee80211_msg_normal = 0,
  80         ieee80211_msg_tx_callback_ack = 1,
  81         ieee80211_msg_tx_callback_fail = 2,
  82 };
  83
  84 struct i802_bss {
  85         struct i802_bss *next;
  86         int ifindex;
  87         unsigned int beacon_set:1;
  88 };
  89
  90 struct wpa_driver_nl80211_data {
  91         void *ctx;
  92         int link_event_sock;
  93         int ioctl_sock; /* socket for ioctl() use */
  94         char ifname[IFNAMSIZ + 1];
  95         int ifindex;
  96         int if_removed;
  97         struct wpa_driver_capa capa;
  98         int has_capability;
  99
 100         int operstate;
 101
 102         int scan_complete_events;
 103
 104         struct nl_handle *nl_handle;
 105         struct nl_cache *nl_cache;
 106         struct nl_cb *nl_cb;
 107         struct genl_family *nl80211;
 108
 109         u8 bssid[ETH_ALEN];
 110         int associated;
 111         u8 ssid[32];
 112         size_t ssid_len;
 113         int nlmode;
 114         int ap_scan_as_station;
 115
 116 #if defined(CONFIG_AP) || defined(HOSTAPD)
 117         int beacon_int;
 118         int monitor_sock;
 119         int monitor_ifidx;
 120 #endif /* CONFIG_AP || HOSTAPD */
 121
 122 #ifdef CONFIG_AP
 123         unsigned int beacon_set:1;
 124 #endif /* CONFIG_AP */
 125
 126 #ifdef HOSTAPD
 127         struct hostapd_data *hapd;
 128
 129         int eapol_sock; /* socket for EAPOL frames */
 130
 131         int default_if_indices[16];
 132         int *if_indices;
 133         int num_if_indices;
 134
 135         struct i802_bss bss;
 136
 137         int last_freq;
 138         int last_freq_ht;
 139 #endif /* HOSTAPD */
 140 };
 141
 142
 143 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 144                                             void *timeout_ctx);
 145 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 146 static int
 147 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 148
 149 #ifdef CONFIG_AP
 150 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 151                                  int ifidx);
 152 #endif /* CONFIG_AP */
 153
 154 #ifdef HOSTAPD
 155 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 156 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 157 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 158                                  int ifindex);
 159 #endif /* HOSTAPD */
 160
 161
 162 /* nl80211 code */
 163 static int ack_handler(struct nl_msg *msg, void *arg)
 164 {
 165         int *err = arg;
 166         *err = 0;
 167         return NL_STOP;
 168 }
 169
 170 static int finish_handler(struct nl_msg *msg, void *arg)
 171 {
 172         int *ret = arg;
 173         *ret = 0;
 174         return NL_SKIP;
 175 }
 176
 177 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 178                          void *arg)
 179 {
 180         int *ret = arg;
 181         *ret = err->error;
 182         return NL_SKIP;
 183 }
 184
 185
 186 static int no_seq_check(struct nl_msg *msg, void *arg)
 187 {
 188         return NL_OK;
 189 }
 190
 191
 192 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 193                               struct nl_msg *msg,
 194                               int (*valid_handler)(struct nl_msg *, void *),
 195                               void *valid_data)
 196 {
 197         struct nl_cb *cb;
 198         int err = -ENOMEM;
 199
 200         cb = nl_cb_clone(drv->nl_cb);
 201         if (!cb)
 202                 goto out;
 203
 204         err = nl_send_auto_complete(drv->nl_handle, msg);
 205         if (err < 0)
 206                 goto out;
 207
 208         err = 1;
 209
 210         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 211         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 212         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 213
 214         if (valid_handler)
 215                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 216                           valid_handler, valid_data);
 217
 218         while (err > 0)
 219                 nl_recvmsgs(drv->nl_handle, cb);
 220  out:
 221         nl_cb_put(cb);
 222         nlmsg_free(msg);
 223         return err;
 224 }
 225
 226
 227 struct family_data {
 228         const char *group;
 229         int id;
 230 };
 231
 232
 233 static int family_handler(struct nl_msg *msg, void *arg)
 234 {
 235         struct family_data *res = arg;
 236         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 237         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 238         struct nlattr *mcgrp;
 239         int i;
 240
 241         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 242                   genlmsg_attrlen(gnlh, 0), NULL);
 243         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 244                 return NL_SKIP;
 245
 246         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 247                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 248                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 249                           nla_len(mcgrp), NULL);
 250                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 251                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 252                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 253                                res->group,
 254                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 255                         continue;
 256                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 257                 break;
 258         };
 259
 260         return NL_SKIP;
 261 }
 262
 263
 264 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 265                                const char *family, const char *group)
 266 {
 267         struct nl_msg *msg;
 268         int ret = -1;
 269         struct family_data res = { group, -ENOENT };
 270
 271         msg = nlmsg_alloc();
 272         if (!msg)
 273                 return -ENOMEM;
 274         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 275                     0, 0, CTRL_CMD_GETFAMILY, 0);
 276         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 277
 278         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 279         msg = NULL;
 280         if (ret == 0)
 281                 ret = res.id;
 282
 283 nla_put_failure:
 284         nlmsg_free(msg);
 285         return ret;
 286 }
 287
 288
 289 static int wpa_driver_nl80211_send_oper_ifla(
 290         struct wpa_driver_nl80211_data *drv,
 291         int linkmode, int operstate)
 292 {
 293         struct {
 294                 struct nlmsghdr hdr;
 295                 struct ifinfomsg ifinfo;
 296                 char opts[16];
 297         } req;
 298         struct rtattr *rta;
 299         static int nl_seq;
 300         ssize_t ret;
 301
 302         os_memset(&req, 0, sizeof(req));
 303
 304         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 305         req.hdr.nlmsg_type = RTM_SETLINK;
 306         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 307         req.hdr.nlmsg_seq = ++nl_seq;
 308         req.hdr.nlmsg_pid = 0;
 309
 310         req.ifinfo.ifi_family = AF_UNSPEC;
 311         req.ifinfo.ifi_type = 0;
 312         req.ifinfo.ifi_index = drv->ifindex;
 313         req.ifinfo.ifi_flags = 0;
 314         req.ifinfo.ifi_change = 0;
 315
 316         if (linkmode != -1) {
 317                 rta = (struct rtattr *)
 318                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 319                 rta->rta_type = IFLA_LINKMODE;
 320                 rta->rta_len = RTA_LENGTH(sizeof(char));
 321                 *((char *) RTA_DATA(rta)) = linkmode;
 322                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 323                         RTA_LENGTH(sizeof(char));
 324         }
 325         if (operstate != -1) {
 326                 rta = (struct rtattr *)
 327                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 328                 rta->rta_type = IFLA_OPERSTATE;
 329                 rta->rta_len = RTA_LENGTH(sizeof(char));
 330                 *((char *) RTA_DATA(rta)) = operstate;
 331                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 332                         RTA_LENGTH(sizeof(char));
 333         }
 334
 335         wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
 336                    linkmode, operstate);
 337
 338         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 339         if (ret < 0) {
 340                 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
 341                            " %s (assume operstate is not supported)",
 342                            strerror(errno));
 343         }
 344
 345         return ret < 0 ? -1 : 0;
 346 }
 347
 348
 349 static int wpa_driver_nl80211_set_auth_param(
 350         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 351 {
 352         struct iwreq iwr;
 353         int ret = 0;
 354
 355         os_memset(&iwr, 0, sizeof(iwr));
 356         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 357         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 358         iwr.u.param.value = value;
 359
 360         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 361                 if (errno != EOPNOTSUPP) {
 362                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 363                                    "value 0x%x) failed: %s)",
 364                                    idx, value, strerror(errno));
 365                 }
 366                 ret = errno == EOPNOTSUPP ? -2 : -1;
 367         }
 368
 369         return ret;
 370 }
 371
 372
 373 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 374 {
 375         struct wpa_driver_nl80211_data *drv = priv;
 376         if (!drv->associated)
 377                 return -1;
 378         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 379         return 0;
 380 }
 381
 382
 383 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 384 {
 385         struct wpa_driver_nl80211_data *drv = priv;
 386         if (!drv->associated)
 387                 return -1;
 388         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 389         return drv->ssid_len;
 390 }
 391
 392
 393 #ifndef HOSTAPD
 394 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 395                                           void *ctx, char *buf, size_t len,
 396                                           int del)
 397 {
 398         union wpa_event_data event;
 399
 400         os_memset(&event, 0, sizeof(event));
 401         if (len > sizeof(event.interface_status.ifname))
 402                 len = sizeof(event.interface_status.ifname) - 1;
 403         os_memcpy(event.interface_status.ifname, buf, len);
 404         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 405                 EVENT_INTERFACE_ADDED;
 406
 407         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 408                    del ? "DEL" : "NEW",
 409                    event.interface_status.ifname,
 410                    del ? "removed" : "added");
 411
 412         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 413                 if (del)
 414                         drv->if_removed = 1;
 415                 else
 416                         drv->if_removed = 0;
 417         }
 418
 419         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 420 }
 421
 422
 423 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 424                                          struct nlmsghdr *h)
 425 {
 426         struct ifinfomsg *ifi;
 427         int attrlen, _nlmsg_len, rta_len;
 428         struct rtattr *attr;
 429
 430         ifi = NLMSG_DATA(h);
 431
 432         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 433
 434         attrlen = h->nlmsg_len - _nlmsg_len;
 435         if (attrlen < 0)
 436                 return 0;
 437
 438         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 439
 440         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 441         while (RTA_OK(attr, attrlen)) {
 442                 if (attr->rta_type == IFLA_IFNAME) {
 443                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 444                             == 0)
 445                                 return 1;
 446                         else
 447                                 break;
 448                 }
 449                 attr = RTA_NEXT(attr, attrlen);
 450         }
 451
 452         return 0;
 453 }
 454
 455
 456 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 457                                           int ifindex, struct nlmsghdr *h)
 458 {
 459         if (drv->ifindex == ifindex)
 460                 return 1;
 461
 462         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 463                 drv->ifindex = if_nametoindex(drv->ifname);
 464                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 465                            "interface");
 466                 wpa_driver_nl80211_finish_drv_init(drv);
 467                 return 1;
 468         }
 469
 470         return 0;
 471 }
 472
 473
 474 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 475                                               void *ctx, struct nlmsghdr *h,
 476                                               size_t len)
 477 {
 478         struct ifinfomsg *ifi;
 479         int attrlen, _nlmsg_len, rta_len;
 480         struct rtattr * attr;
 481
 482         if (len < sizeof(*ifi))
 483                 return;
 484
 485         ifi = NLMSG_DATA(h);
 486
 487         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 488                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 489                            ifi->ifi_index);
 490                 return;
 491         }
 492
 493         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 494                    "(%s%s%s%s)",
 495                    drv->operstate, ifi->ifi_flags,
 496                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 497                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 498                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 499                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 500         /*
 501          * Some drivers send the association event before the operup event--in
 502          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 503          * fails. This will hit us when wpa_supplicant does not need to do
 504          * IEEE 802.1X authentication
 505          */
 506         if (drv->operstate == 1 &&
 507             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 508             !(ifi->ifi_flags & IFF_RUNNING))
 509                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 510
 511         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 512
 513         attrlen = h->nlmsg_len - _nlmsg_len;
 514         if (attrlen < 0)
 515                 return;
 516
 517         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 518
 519         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 520         while (RTA_OK(attr, attrlen)) {
 521                 if (attr->rta_type == IFLA_IFNAME) {
 522                         wpa_driver_nl80211_event_link(
 523                                 drv, ctx,
 524                                 ((char *) attr) + rta_len,
 525                                 attr->rta_len - rta_len, 0);
 526                 }
 527                 attr = RTA_NEXT(attr, attrlen);
 528         }
 529 }
 530
 531
 532 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 533                                               void *ctx, struct nlmsghdr *h,
 534                                               size_t len)
 535 {
 536         struct ifinfomsg *ifi;
 537         int attrlen, _nlmsg_len, rta_len;
 538         struct rtattr * attr;
 539
 540         if (len < sizeof(*ifi))
 541                 return;
 542
 543         ifi = NLMSG_DATA(h);
 544
 545         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 546
 547         attrlen = h->nlmsg_len - _nlmsg_len;
 548         if (attrlen < 0)
 549                 return;
 550
 551         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 552
 553         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 554         while (RTA_OK(attr, attrlen)) {
 555                 if (attr->rta_type == IFLA_IFNAME) {
 556                         wpa_driver_nl80211_event_link(
 557                                 drv, ctx,
 558                                 ((char *) attr) + rta_len,
 559                                 attr->rta_len - rta_len, 1);
 560                 }
 561                 attr = RTA_NEXT(attr, attrlen);
 562         }
 563 }
 564
 565
 566 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 567                                                   void *sock_ctx)
 568 {
 569         char buf[8192];
 570         int left;
 571         struct sockaddr_nl from;
 572         socklen_t fromlen;
 573         struct nlmsghdr *h;
 574         int max_events = 10;
 575
 576 try_again:
 577         fromlen = sizeof(from);
 578         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 579                         (struct sockaddr *) &from, &fromlen);
 580         if (left < 0) {
 581                 if (errno != EINTR && errno != EAGAIN)
 582                         perror("recvfrom(netlink)");
 583                 return;
 584         }
 585
 586         h = (struct nlmsghdr *) buf;
 587         while (left >= (int) sizeof(*h)) {
 588                 int len, plen;
 589
 590                 len = h->nlmsg_len;
 591                 plen = len - sizeof(*h);
 592                 if (len > left || plen < 0) {
 593                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 594                                    "len=%d left=%d plen=%d",
 595                                    len, left, plen);
 596                         break;
 597                 }
 598
 599                 switch (h->nlmsg_type) {
 600                 case RTM_NEWLINK:
 601                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 602                                                           h, plen);
 603                         break;
 604                 case RTM_DELLINK:
 605                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 606                                                           h, plen);
 607                         break;
 608                 }
 609
 610                 len = NLMSG_ALIGN(len);
 611                 left -= len;
 612                 h = (struct nlmsghdr *) ((char *) h + len);
 613         }
 614
 615         if (left > 0) {
 616                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 617                            "message", left);
 618         }
 619
 620         if (--max_events > 0) {
 621                 /*
 622                  * Try to receive all events in one eloop call in order to
 623                  * limit race condition on cases where AssocInfo event, Assoc
 624                  * event, and EAPOL frames are received more or less at the
 625                  * same time. We want to process the event messages first
 626                  * before starting EAPOL processing.
 627                  */
 628                 goto try_again;
 629         }
 630 }
 631
 632
 633 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 634                             const u8 *frame, size_t len)
 635 {
 636         const struct ieee80211_mgmt *mgmt;
 637         union wpa_event_data event;
 638
 639         mgmt = (const struct ieee80211_mgmt *) frame;
 640         if (len < 24 + sizeof(mgmt->u.auth)) {
 641                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 642                            "frame");
 643                 return;
 644         }
 645
 646         os_memset(&event, 0, sizeof(event));
 647         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 648         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 649         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 650         if (len > 24 + sizeof(mgmt->u.auth)) {
 651                 event.auth.ies = mgmt->u.auth.variable;
 652                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 653         }
 654
 655         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 656 }
 657
 658
 659 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 660                             const u8 *frame, size_t len)
 661 {
 662         const struct ieee80211_mgmt *mgmt;
 663         union wpa_event_data event;
 664         u16 status;
 665
 666         mgmt = (const struct ieee80211_mgmt *) frame;
 667         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 668                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 669                            "frame");
 670                 return;
 671         }
 672
 673         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 674         if (status != WLAN_STATUS_SUCCESS) {
 675                 os_memset(&event, 0, sizeof(event));
 676                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 677                         event.assoc_reject.resp_ies =
 678                                 (u8 *) mgmt->u.assoc_resp.variable;
 679                         event.assoc_reject.resp_ies_len =
 680                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 681                 }
 682                 event.assoc_reject.status_code = status;
 683
 684                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 685                 return;
 686         }
 687
 688         drv->associated = 1;
 689         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 690
 691         os_memset(&event, 0, sizeof(event));
 692         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 693                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 694                 event.assoc_info.resp_ies_len =
 695                         len - 24 - sizeof(mgmt->u.assoc_resp);
 696         }
 697
 698         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 699 }
 700
 701
 702 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 703                        enum nl80211_commands cmd, struct nlattr *frame)
 704 {
 705         if (frame == NULL) {
 706                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 707                            "data", cmd);
 708                 return;
 709         }
 710
 711         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 712         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 713                     nla_data(frame), nla_len(frame));
 714
 715         switch (cmd) {
 716         case NL80211_CMD_AUTHENTICATE:
 717                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 718                 break;
 719         case NL80211_CMD_ASSOCIATE:
 720                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 721                 break;
 722         case NL80211_CMD_DEAUTHENTICATE:
 723                 drv->associated = 0;
 724                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 725                 break;
 726         case NL80211_CMD_DISASSOCIATE:
 727                 drv->associated = 0;
 728                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 729                 break;
 730         default:
 731                 break;
 732         }
 733 }
 734
 735 #endif /* HOSTAPD */
 736
 737
 738 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 739                                            struct nlattr *tb[])
 740 {
 741         union wpa_event_data data;
 742
 743         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 744         os_memset(&data, 0, sizeof(data));
 745         if (tb[NL80211_ATTR_MAC]) {
 746                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 747                             nla_data(tb[NL80211_ATTR_MAC]),
 748                             nla_len(tb[NL80211_ATTR_MAC]));
 749                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 750         }
 751         if (tb[NL80211_ATTR_KEY_SEQ]) {
 752                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 753                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 754                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 755         }
 756         if (tb[NL80211_ATTR_KEY_TYPE]) {
 757                 enum nl80211_key_type key_type =
 758                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 759                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 760                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 761                         data.michael_mic_failure.unicast = 1;
 762         } else
 763                 data.michael_mic_failure.unicast = 1;
 764
 765         if (tb[NL80211_ATTR_KEY_IDX]) {
 766                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 767                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 768         }
 769
 770         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 771 }
 772
 773
 774 static int process_event(struct nl_msg *msg, void *arg)
 775 {
 776         struct wpa_driver_nl80211_data *drv = arg;
 777         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 778         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 779
 780         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 781                   genlmsg_attrlen(gnlh, 0), NULL);
 782
 783         if (tb[NL80211_ATTR_IFINDEX]) {
 784                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 785                 if (ifindex != drv->ifindex) {
 786                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 787                                    " for foreign interface (ifindex %d)",
 788                                    gnlh->cmd, ifindex);
 789                         return NL_SKIP;
 790                 }
 791         }
 792
 793         if (drv->ap_scan_as_station &&
 794             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 795              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 796                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 797                 drv->ap_scan_as_station = 0;
 798         }
 799
 800         switch (gnlh->cmd) {
 801         case NL80211_CMD_NEW_SCAN_RESULTS:
 802                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 803                 drv->scan_complete_events = 1;
 804                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 805                                      drv->ctx);
 806                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 807                 break;
 808         case NL80211_CMD_SCAN_ABORTED:
 809                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 810                 /*
 811                  * Need to indicate that scan results are available in order
 812                  * not to make wpa_supplicant stop its scanning.
 813                  */
 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 #ifndef HOSTAPD
 819         case NL80211_CMD_AUTHENTICATE:
 820         case NL80211_CMD_ASSOCIATE:
 821         case NL80211_CMD_DEAUTHENTICATE:
 822         case NL80211_CMD_DISASSOCIATE:
 823                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
 824                 break;
 825 #endif /* HOSTAPD */
 826         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 827                 mlme_event_michael_mic_failure(drv, tb);
 828                 break;
 829         default:
 830                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 831                            "(cmd=%d)", gnlh->cmd);
 832                 break;
 833         }
 834
 835         return NL_SKIP;
 836 }
 837
 838
 839 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 840                                              void *sock_ctx)
 841 {
 842         struct nl_cb *cb;
 843         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 844
 845         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 846
 847         cb = nl_cb_clone(drv->nl_cb);
 848         if (!cb)
 849                 return;
 850         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 851         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 852         nl_recvmsgs(drv->nl_handle, cb);
 853         nl_cb_put(cb);
 854 }
 855
 856
 857 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 858                                    const char *ifname, int dev_up)
 859 {
 860         struct ifreq ifr;
 861
 862         if (drv->ioctl_sock < 0)
 863                 return -1;
 864
 865         os_memset(&ifr, 0, sizeof(ifr));
 866         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 867
 868         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 869                 perror("ioctl[SIOCGIFFLAGS]");
 870                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 871                            ifname);
 872                 return -1;
 873         }
 874
 875         if (dev_up) {
 876                 if (ifr.ifr_flags & IFF_UP)
 877                         return 0;
 878                 ifr.ifr_flags |= IFF_UP;
 879         } else {
 880                 if (!(ifr.ifr_flags & IFF_UP))
 881                         return 0;
 882                 ifr.ifr_flags &= ~IFF_UP;
 883         }
 884
 885         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 886                 perror("ioctl[SIOCSIFFLAGS]");
 887                 return -1;
 888         }
 889
 890         return 0;
 891 }
 892
 893
 894 /**
 895  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 896  * @priv: driver_nl80211 private data
 897  * @alpha2_arg: country to which to switch to
 898  * Returns: 0 on success, -1 on failure
 899  *
 900  * This asks nl80211 to set the regulatory domain for given
 901  * country ISO / IEC alpha2.
 902  */
 903 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 904 {
 905         struct wpa_driver_nl80211_data *drv = priv;
 906         char alpha2[3];
 907         struct nl_msg *msg;
 908
 909         msg = nlmsg_alloc();
 910         if (!msg)
 911                 return -ENOMEM;
 912
 913         alpha2[0] = alpha2_arg[0];
 914         alpha2[1] = alpha2_arg[1];
 915         alpha2[2] = '\0';
 916
 917         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 918                     0, NL80211_CMD_REQ_SET_REG, 0);
 919
 920         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 921         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 922                 return -EINVAL;
 923         return 0;
 924 nla_put_failure:
 925         return -EINVAL;
 926 }
 927
 928
 929 struct wiphy_info_data {
 930         int max_scan_ssids;
 931         int ap_supported;
 932 };
 933
 934
 935 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 936 {
 937         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 938         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 939         struct wiphy_info_data *info = arg;
 940
 941         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 942                   genlmsg_attrlen(gnlh, 0), NULL);
 943
 944         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 945                 info->max_scan_ssids =
 946                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 947
 948         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 949                 struct nlattr *nl_mode;
 950                 int i;
 951                 nla_for_each_nested(nl_mode,
 952                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 953                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 954                                 info->ap_supported = 1;
 955                                 break;
 956                         }
 957                 }
 958         }
 959
 960         return NL_SKIP;
 961 }
 962
 963
 964 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 965                                        struct wiphy_info_data *info)
 966 {
 967         struct nl_msg *msg;
 968
 969         os_memset(info, 0, sizeof(*info));
 970         msg = nlmsg_alloc();
 971         if (!msg)
 972                 return -1;
 973
 974         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 975                     0, NL80211_CMD_GET_WIPHY, 0);
 976
 977         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 978
 979         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
 980                 return 0;
 981         msg = NULL;
 982 nla_put_failure:
 983         nlmsg_free(msg);
 984         return -1;
 985 }
 986
 987
 988 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
 989 {
 990         struct wiphy_info_data info;
 991         if (wpa_driver_nl80211_get_info(drv, &info))
 992                 return;
 993         drv->has_capability = 1;
 994         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
 995         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
 996                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
 997                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
 998                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
 999         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1000                 WPA_DRIVER_CAPA_ENC_WEP104 |
1001                 WPA_DRIVER_CAPA_ENC_TKIP |
1002                 WPA_DRIVER_CAPA_ENC_CCMP;
1003
1004         drv->capa.max_scan_ssids = info.max_scan_ssids;
1005         if (info.ap_supported)
1006                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1007 }
1008
1009
1010 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1011                                       void *ctx)
1012 {
1013         int ret;
1014
1015         /* Initialize generic netlink and nl80211 */
1016
1017         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1018         if (drv->nl_cb == NULL) {
1019                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1020                            "callbacks");
1021                 goto err1;
1022         }
1023
1024         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1025         if (drv->nl_handle == NULL) {
1026                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1027                            "callbacks");
1028                 goto err2;
1029         }
1030
1031         if (genl_connect(drv->nl_handle)) {
1032                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1033                            "netlink");
1034                 goto err3;
1035         }
1036
1037 #ifdef CONFIG_LIBNL20
1038         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1039                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1040                            "netlink cache");
1041                 goto err3;
1042         }
1043 #else /* CONFIG_LIBNL20 */
1044         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1045         if (drv->nl_cache == NULL) {
1046                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1047                            "netlink cache");
1048                 goto err3;
1049         }
1050 #endif /* CONFIG_LIBNL20 */
1051
1052
1053         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1054         if (drv->nl80211 == NULL) {
1055                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1056                            "found");
1057                 goto err4;
1058         }
1059
1060         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1061         if (ret >= 0)
1062                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1063         if (ret < 0) {
1064                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1065                            "membership for scan events: %d (%s)",
1066                            ret, strerror(-ret));
1067                 goto err4;
1068         }
1069
1070         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1071         if (ret >= 0)
1072                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1073         if (ret < 0) {
1074                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1075                            "membership for mlme events: %d (%s)",
1076                            ret, strerror(-ret));
1077                 goto err4;
1078         }
1079
1080         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1081                                  wpa_driver_nl80211_event_receive, drv, ctx);
1082
1083         return 0;
1084
1085 err4:
1086         nl_cache_free(drv->nl_cache);
1087 err3:
1088         nl_handle_destroy(drv->nl_handle);
1089 err2:
1090         nl_cb_put(drv->nl_cb);
1091 err1:
1092         return -1;
1093 }
1094
1095
1096 /**
1097  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1098  * @ctx: context to be used when calling wpa_supplicant functions,
1099  * e.g., wpa_supplicant_event()
1100  * @ifname: interface name, e.g., wlan0
1101  * Returns: Pointer to private data, %NULL on failure
1102  */
1103 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1104 {
1105         int s;
1106         struct sockaddr_nl local;
1107         struct wpa_driver_nl80211_data *drv;
1108
1109         drv = os_zalloc(sizeof(*drv));
1110         if (drv == NULL)
1111                 return NULL;
1112         drv->ctx = ctx;
1113         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1114 #ifdef CONFIG_AP
1115         drv->monitor_ifidx = -1;
1116         drv->monitor_sock = -1;
1117 #endif /* CONFIG_AP */
1118
1119         if (wpa_driver_nl80211_init_nl(drv, ctx))
1120                 goto err1;
1121
1122         drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1123
1124         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1125         if (drv->ioctl_sock < 0) {
1126                 perror("socket(PF_INET,SOCK_DGRAM)");
1127                 goto err5;
1128         }
1129
1130         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1131         if (s < 0) {
1132                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1133                 goto err6;
1134         }
1135
1136         os_memset(&local, 0, sizeof(local));
1137         local.nl_family = AF_NETLINK;
1138         local.nl_groups = RTMGRP_LINK;
1139         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1140                 perror("bind(netlink)");
1141                 close(s);
1142                 goto err6;
1143         }
1144
1145 #ifndef HOSTAPD
1146         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1147                                  ctx);
1148 #endif /* HOSTAPD */
1149         drv->link_event_sock = s;
1150
1151         if (wpa_driver_nl80211_finish_drv_init(drv))
1152                 goto err7;
1153
1154         return drv;
1155
1156 err7:
1157         eloop_unregister_read_sock(drv->link_event_sock);
1158         close(drv->link_event_sock);
1159 err6:
1160         close(drv->ioctl_sock);
1161 err5:
1162         genl_family_put(drv->nl80211);
1163         nl_cache_free(drv->nl_cache);
1164         nl_handle_destroy(drv->nl_handle);
1165         nl_cb_put(drv->nl_cb);
1166 err1:
1167         os_free(drv);
1168         return NULL;
1169 }
1170
1171
1172 static int
1173 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1174 {
1175         drv->ifindex = if_nametoindex(drv->ifname);
1176
1177         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1178                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1179                            "use managed mode");
1180         }
1181
1182         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1183                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1184                            "UP", drv->ifname);
1185                 return -1;
1186         }
1187
1188         wpa_driver_nl80211_capa(drv);
1189
1190         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1191
1192         return 0;
1193 }
1194
1195
1196 /**
1197  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1198  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1199  *
1200  * Shut down driver interface and processing of driver events. Free
1201  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1202  */
1203 static void wpa_driver_nl80211_deinit(void *priv)
1204 {
1205         struct wpa_driver_nl80211_data *drv = priv;
1206
1207 #ifdef CONFIG_AP
1208         if (drv->monitor_ifidx >= 0)
1209                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1210         if (drv->monitor_sock >= 0) {
1211                 eloop_unregister_read_sock(drv->monitor_sock);
1212                 close(drv->monitor_sock);
1213         }
1214 #endif /* CONFIG_AP */
1215
1216         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1217
1218         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1219
1220         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1221
1222         eloop_unregister_read_sock(drv->link_event_sock);
1223
1224         hostapd_set_iface_flags(drv, drv->ifname, 0);
1225         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1226
1227         close(drv->link_event_sock);
1228         close(drv->ioctl_sock);
1229
1230         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1231         genl_family_put(drv->nl80211);
1232         nl_cache_free(drv->nl_cache);
1233         nl_handle_destroy(drv->nl_handle);
1234         nl_cb_put(drv->nl_cb);
1235
1236         os_free(drv);
1237 }
1238
1239
1240 /**
1241  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1242  * @eloop_ctx: Driver private data
1243  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1244  *
1245  * This function can be used as registered timeout when starting a scan to
1246  * generate a scan completed event if the driver does not report this.
1247  */
1248 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1249 {
1250         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1251         if (drv->ap_scan_as_station) {
1252                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1253                 drv->ap_scan_as_station = 0;
1254         }
1255         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1256         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1257 }
1258
1259
1260 /**
1261  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1262  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1263  * @params: Scan parameters
1264  * Returns: 0 on success, -1 on failure
1265  */
1266 static int wpa_driver_nl80211_scan(void *priv,
1267                                    struct wpa_driver_scan_params *params)
1268 {
1269         struct wpa_driver_nl80211_data *drv = priv;
1270         int ret = 0, timeout;
1271         struct nl_msg *msg, *ssids, *freqs;
1272         size_t i;
1273
1274         msg = nlmsg_alloc();
1275         ssids = nlmsg_alloc();
1276         freqs = nlmsg_alloc();
1277         if (!msg || !ssids || !freqs) {
1278                 nlmsg_free(msg);
1279                 nlmsg_free(ssids);
1280                 nlmsg_free(freqs);
1281                 return -1;
1282         }
1283
1284         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1285                     NL80211_CMD_TRIGGER_SCAN, 0);
1286
1287         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1288
1289         for (i = 0; i < params->num_ssids; i++) {
1290                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1291                         params->ssids[i].ssid);
1292         }
1293         if (params->num_ssids)
1294                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1295
1296         if (params->extra_ies) {
1297                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1298                         params->extra_ies);
1299         }
1300
1301         if (params->freqs) {
1302                 for (i = 0; params->freqs[i]; i++)
1303                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1304                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1305         }
1306
1307         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1308         msg = NULL;
1309         if (ret) {
1310                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1311                            "(%s)", ret, strerror(-ret));
1312 #ifdef HOSTAPD
1313                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1314                         /*
1315                          * mac80211 does not allow scan requests in AP mode, so
1316                          * try to do this in station mode.
1317                          */
1318                         if (wpa_driver_nl80211_set_mode(drv,
1319                                                         IEEE80211_MODE_INFRA))
1320                                 goto nla_put_failure;
1321
1322                         if (wpa_driver_nl80211_scan(drv, params)) {
1323                                 wpa_driver_nl80211_set_mode(drv,
1324                                                             IEEE80211_MODE_AP);
1325                                 goto nla_put_failure;
1326                         }
1327
1328                         /* Restore AP mode when processing scan results */
1329                         drv->ap_scan_as_station = 1;
1330                         ret = 0;
1331                 } else
1332                         goto nla_put_failure;
1333 #else /* HOSTAPD */
1334                 goto nla_put_failure;
1335 #endif /* HOSTAPD */
1336         }
1337
1338         /* Not all drivers generate "scan completed" wireless event, so try to
1339          * read results after a timeout. */
1340         timeout = 10;
1341         if (drv->scan_complete_events) {
1342                 /*
1343                  * The driver seems to deliver events to notify when scan is
1344                  * complete, so use longer timeout to avoid race conditions
1345                  * with scanning and following association request.
1346                  */
1347                 timeout = 30;
1348         }
1349         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1350                    "seconds", ret, timeout);
1351         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1352         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1353                                drv, drv->ctx);
1354
1355 nla_put_failure:
1356         nlmsg_free(ssids);
1357         nlmsg_free(msg);
1358         nlmsg_free(freqs);
1359         return ret;
1360 }
1361
1362
1363 static int bss_info_handler(struct nl_msg *msg, void *arg)
1364 {
1365         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1366         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1367         struct nlattr *bss[NL80211_BSS_MAX + 1];
1368         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1369                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1370                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1371                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1372                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1373                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1374                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1375                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1376                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1377         };
1378         struct wpa_scan_results *res = arg;
1379         struct wpa_scan_res **tmp;
1380         struct wpa_scan_res *r;
1381         const u8 *ie;
1382         size_t ie_len;
1383
1384         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1385                   genlmsg_attrlen(gnlh, 0), NULL);
1386         if (!tb[NL80211_ATTR_BSS])
1387                 return NL_SKIP;
1388         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1389                              bss_policy))
1390                 return NL_SKIP;
1391         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1392                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1393                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1394         } else {
1395                 ie = NULL;
1396                 ie_len = 0;
1397         }
1398
1399         r = os_zalloc(sizeof(*r) + ie_len);
1400         if (r == NULL)
1401                 return NL_SKIP;
1402         if (bss[NL80211_BSS_BSSID])
1403                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1404                           ETH_ALEN);
1405         if (bss[NL80211_BSS_FREQUENCY])
1406                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1407         if (bss[NL80211_BSS_BEACON_INTERVAL])
1408                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1409         if (bss[NL80211_BSS_CAPABILITY])
1410                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1411         r->flags |= WPA_SCAN_NOISE_INVALID;
1412         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1413                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1414                 r->level /= 100; /* mBm to dBm */
1415                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1416         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1417                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1418                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1419         } else
1420                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1421         if (bss[NL80211_BSS_TSF])
1422                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1423         r->ie_len = ie_len;
1424         if (ie)
1425                 os_memcpy(r + 1, ie, ie_len);
1426
1427         tmp = os_realloc(res->res,
1428                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1429         if (tmp == NULL) {
1430                 os_free(r);
1431                 return NL_SKIP;
1432         }
1433         tmp[res->num++] = r;
1434         res->res = tmp;
1435
1436         return NL_SKIP;
1437 }
1438
1439
1440 /**
1441  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1442  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1443  * Returns: Scan results on success, -1 on failure
1444  */
1445 static struct wpa_scan_results *
1446 wpa_driver_nl80211_get_scan_results(void *priv)
1447 {
1448         struct wpa_driver_nl80211_data *drv = priv;
1449         struct nl_msg *msg;
1450         struct wpa_scan_results *res;
1451         int ret;
1452
1453         res = os_zalloc(sizeof(*res));
1454         if (res == NULL)
1455                 return 0;
1456         msg = nlmsg_alloc();
1457         if (!msg)
1458                 goto nla_put_failure;
1459
1460         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1461                     NL80211_CMD_GET_SCAN, 0);
1462         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1463
1464         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1465         msg = NULL;
1466         if (ret == 0) {
1467                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1468                            (unsigned long) res->num);
1469                 return res;
1470         }
1471         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1472                    "(%s)", ret, strerror(-ret));
1473 nla_put_failure:
1474         nlmsg_free(msg);
1475         wpa_scan_results_free(res);
1476         return NULL;
1477 }
1478
1479
1480 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1481                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1482                        const u8 *seq, size_t seq_len,
1483                        const u8 *key, size_t key_len)
1484 {
1485         struct nl_msg *msg;
1486         int ret;
1487
1488         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1489                    "set_tx=%d seq_len=%lu key_len=%lu",
1490                    __func__, ifindex, alg, addr, key_idx, set_tx,
1491                    (unsigned long) seq_len, (unsigned long) key_len);
1492
1493         msg = nlmsg_alloc();
1494         if (!msg)
1495                 return -ENOMEM;
1496
1497         if (alg == WPA_ALG_NONE) {
1498                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1499                             0, NL80211_CMD_DEL_KEY, 0);
1500         } else {
1501                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1502                             0, NL80211_CMD_NEW_KEY, 0);
1503                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1504                 switch (alg) {
1505                 case WPA_ALG_WEP:
1506                         if (key_len == 5)
1507                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1508                                             0x000FAC01);
1509                         else
1510                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1511                                             0x000FAC05);
1512                         break;
1513                 case WPA_ALG_TKIP:
1514                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1515                         break;
1516                 case WPA_ALG_CCMP:
1517                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1518                         break;
1519                 case WPA_ALG_IGTK:
1520                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1521                         break;
1522                 default:
1523                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1524                                    "algorithm %d", __func__, alg);
1525                         nlmsg_free(msg);
1526                         return -1;
1527                 }
1528         }
1529
1530         if (seq)
1531                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1532
1533         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1534         {
1535                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1536                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1537         }
1538         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1539         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1540
1541         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1542         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1543                 ret = 0;
1544         if (ret)
1545                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1546                            ret, strerror(-ret));
1547
1548         /*
1549          * If we failed or don't need to set the default TX key (below),
1550          * we're done here.
1551          */
1552         if (ret || !set_tx || alg == WPA_ALG_NONE)
1553                 return ret;
1554 #ifdef HOSTAPD /* FIX: is this needed? */
1555         if (addr)
1556                 return ret;
1557 #endif /* HOSTAPD */
1558
1559         msg = nlmsg_alloc();
1560         if (!msg)
1561                 return -ENOMEM;
1562
1563         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1564                     0, NL80211_CMD_SET_KEY, 0);
1565         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1566         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1567         if (alg == WPA_ALG_IGTK)
1568                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1569         else
1570                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1571
1572         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1573         if (ret == -ENOENT)
1574                 ret = 0;
1575         if (ret)
1576                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1577                            "err=%d %s)", ret, strerror(-ret));
1578         return ret;
1579
1580 nla_put_failure:
1581         return -ENOBUFS;
1582 }
1583
1584
1585 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1586                                       const u8 *addr, int key_idx,
1587                                       int set_tx, const u8 *seq,
1588                                       size_t seq_len,
1589                                       const u8 *key, size_t key_len)
1590 {
1591         struct wpa_driver_nl80211_data *drv = priv;
1592         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1593                            seq_len, key, key_len);
1594 }
1595
1596
1597 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1598                                    const u8 *addr, int cmd, u16 reason_code)
1599 {
1600         int ret = -1;
1601         struct nl_msg *msg;
1602
1603         msg = nlmsg_alloc();
1604         if (!msg)
1605                 return -1;
1606
1607         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1608
1609         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1610         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1611         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1612
1613         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1614         msg = NULL;
1615         if (ret) {
1616                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1617                            "(%s)", ret, strerror(-ret));
1618                 goto nla_put_failure;
1619         }
1620         ret = 0;
1621
1622 nla_put_failure:
1623         nlmsg_free(msg);
1624         return ret;
1625 }
1626
1627
1628 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1629                                              int reason_code)
1630 {
1631         struct wpa_driver_nl80211_data *drv = priv;
1632         wpa_printf(MSG_DEBUG, "%s", __func__);
1633         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1634                                        reason_code);
1635 }
1636
1637
1638 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1639                                            int reason_code)
1640 {
1641         struct wpa_driver_nl80211_data *drv = priv;
1642         wpa_printf(MSG_DEBUG, "%s", __func__);
1643         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1644                                        reason_code);
1645 }
1646
1647
1648 static int wpa_driver_nl80211_authenticate(
1649         void *priv, struct wpa_driver_auth_params *params)
1650 {
1651         struct wpa_driver_nl80211_data *drv = priv;
1652         int ret = -1, i;
1653         struct nl_msg *msg;
1654         enum nl80211_auth_type type;
1655
1656         drv->associated = 0;
1657
1658         msg = nlmsg_alloc();
1659         if (!msg)
1660                 return -1;
1661
1662         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1663                    drv->ifindex);
1664
1665         for (i = 0; i < 4; i++) {
1666                 if (!params->wep_key[i])
1667                         continue;
1668                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1669                                            i == params->wep_tx_keyidx, NULL, 0,
1670                                            params->wep_key[i],
1671                                            params->wep_key_len[i]);
1672         }
1673
1674         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1675                     NL80211_CMD_AUTHENTICATE, 0);
1676
1677         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1678         if (params->bssid) {
1679                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1680                            MAC2STR(params->bssid));
1681                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1682         }
1683         if (params->freq) {
1684                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1685                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1686         }
1687         if (params->ssid) {
1688                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1689                                   params->ssid, params->ssid_len);
1690                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1691                         params->ssid);
1692         }
1693         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1694         if (params->ie)
1695                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1696         /*
1697          * TODO: if multiple auth_alg options enabled, try them one by one if
1698          * the AP rejects authentication due to unknown auth alg
1699          */
1700         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1701                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1702         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1703                 type = NL80211_AUTHTYPE_SHARED_KEY;
1704         else if (params->auth_alg & AUTH_ALG_LEAP)
1705                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1706         else if (params->auth_alg & AUTH_ALG_FT)
1707                 type = NL80211_AUTHTYPE_FT;
1708         else
1709                 goto nla_put_failure;
1710         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1711         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1712
1713         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1714         msg = NULL;
1715         if (ret) {
1716                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1717                            "(%s)", ret, strerror(-ret));
1718                 goto nla_put_failure;
1719         }
1720         ret = 0;
1721         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1722                    "successfully");
1723
1724 nla_put_failure:
1725         nlmsg_free(msg);
1726         return ret;
1727 }
1728
1729
1730 #if defined(CONFIG_AP) || defined(HOSTAPD)
1731
1732 struct phy_info_arg {
1733         u16 *num_modes;
1734         struct hostapd_hw_modes *modes;
1735 };
1736
1737 static int phy_info_handler(struct nl_msg *msg, void *arg)
1738 {
1739         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1740         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1741         struct phy_info_arg *phy_info = arg;
1742
1743         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1744
1745         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1746         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1747                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1748                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1749                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1750                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1751                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1752                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1753         };
1754
1755         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1756         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1757                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1758                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1759         };
1760
1761         struct nlattr *nl_band;
1762         struct nlattr *nl_freq;
1763         struct nlattr *nl_rate;
1764         int rem_band, rem_freq, rem_rate;
1765         struct hostapd_hw_modes *mode;
1766         int idx, mode_is_set;
1767
1768         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1769                   genlmsg_attrlen(gnlh, 0), NULL);
1770
1771         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1772                 return NL_SKIP;
1773
1774         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1775                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1776                 if (!mode)
1777                         return NL_SKIP;
1778                 phy_info->modes = mode;
1779
1780                 mode_is_set = 0;
1781
1782                 mode = &phy_info->modes[*(phy_info->num_modes)];
1783                 memset(mode, 0, sizeof(*mode));
1784                 *(phy_info->num_modes) += 1;
1785
1786                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1787                           nla_len(nl_band), NULL);
1788
1789                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1790                         mode->ht_capab = nla_get_u16(
1791                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1792                 }
1793
1794                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1795                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1796                                   nla_len(nl_freq), freq_policy);
1797                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1798                                 continue;
1799                         mode->num_channels++;
1800                 }
1801
1802                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1803                 if (!mode->channels)
1804                         return NL_SKIP;
1805
1806                 idx = 0;
1807
1808                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1809                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1810                                   nla_len(nl_freq), freq_policy);
1811                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1812                                 continue;
1813
1814                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1815                         mode->channels[idx].flag = 0;
1816
1817                         if (!mode_is_set) {
1818                                 /* crude heuristic */
1819                                 if (mode->channels[idx].freq < 4000)
1820                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1821                                 else
1822                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1823                                 mode_is_set = 1;
1824                         }
1825
1826                         /* crude heuristic */
1827                         if (mode->channels[idx].freq < 4000)
1828                                 if (mode->channels[idx].freq == 2484)
1829                                         mode->channels[idx].chan = 14;
1830                                 else
1831                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1832                         else
1833                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1834
1835                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1836                                 mode->channels[idx].flag |=
1837                                         HOSTAPD_CHAN_DISABLED;
1838                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1839                                 mode->channels[idx].flag |=
1840                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1841                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1842                                 mode->channels[idx].flag |=
1843                                         HOSTAPD_CHAN_NO_IBSS;
1844                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1845                                 mode->channels[idx].flag |=
1846                                         HOSTAPD_CHAN_RADAR;
1847
1848                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1849                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1850                                 mode->channels[idx].max_tx_power =
1851                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1852
1853                         idx++;
1854                 }
1855
1856                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1857                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1858                                   nla_len(nl_rate), rate_policy);
1859                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1860                                 continue;
1861                         mode->num_rates++;
1862                 }
1863
1864                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1865                 if (!mode->rates)
1866                         return NL_SKIP;
1867
1868                 idx = 0;
1869
1870                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1871                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1872                                   nla_len(nl_rate), rate_policy);
1873                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1874                                 continue;
1875                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1876
1877                         /* crude heuristic */
1878                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1879                             mode->rates[idx].rate > 200)
1880                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1881
1882                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1883                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1884
1885                         idx++;
1886                 }
1887         }
1888
1889         return NL_SKIP;
1890 }
1891
1892 static struct hostapd_hw_modes *
1893 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1894 {
1895         u16 m;
1896         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1897         int i, mode11g_idx = -1;
1898
1899         /* If only 802.11g mode is included, use it to construct matching
1900          * 802.11b mode data. */
1901
1902         for (m = 0; m < *num_modes; m++) {
1903                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1904                         return modes; /* 802.11b already included */
1905                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1906                         mode11g_idx = m;
1907         }
1908
1909         if (mode11g_idx < 0)
1910                 return modes; /* 2.4 GHz band not supported at all */
1911
1912         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1913         if (nmodes == NULL)
1914                 return modes; /* Could not add 802.11b mode */
1915
1916         mode = &nmodes[*num_modes];
1917         os_memset(mode, 0, sizeof(*mode));
1918         (*num_modes)++;
1919         modes = nmodes;
1920
1921         mode->mode = HOSTAPD_MODE_IEEE80211B;
1922
1923         mode11g = &modes[mode11g_idx];
1924         mode->num_channels = mode11g->num_channels;
1925         mode->channels = os_malloc(mode11g->num_channels *
1926                                    sizeof(struct hostapd_channel_data));
1927         if (mode->channels == NULL) {
1928                 (*num_modes)--;
1929                 return modes; /* Could not add 802.11b mode */
1930         }
1931         os_memcpy(mode->channels, mode11g->channels,
1932                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
1933
1934         mode->num_rates = 0;
1935         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1936         if (mode->rates == NULL) {
1937                 os_free(mode->channels);
1938                 (*num_modes)--;
1939                 return modes; /* Could not add 802.11b mode */
1940         }
1941
1942         for (i = 0; i < mode11g->num_rates; i++) {
1943                 if (mode11g->rates[i].rate > 110 ||
1944                     mode11g->rates[i].flags &
1945                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1946                         continue;
1947                 mode->rates[mode->num_rates] = mode11g->rates[i];
1948                 mode->num_rates++;
1949                 if (mode->num_rates == 4)
1950                         break;
1951         }
1952
1953         if (mode->num_rates == 0) {
1954                 os_free(mode->channels);
1955                 os_free(mode->rates);
1956                 (*num_modes)--;
1957                 return modes; /* No 802.11b rates */
1958         }
1959
1960         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1961                    "information");
1962
1963         return modes;
1964 }
1965
1966
1967 static struct hostapd_hw_modes *
1968 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1969 {
1970         struct wpa_driver_nl80211_data *drv = priv;
1971         struct nl_msg *msg;
1972         struct phy_info_arg result = {
1973                 .num_modes = num_modes,
1974                 .modes = NULL,
1975         };
1976
1977         *num_modes = 0;
1978         *flags = 0;
1979
1980         msg = nlmsg_alloc();
1981         if (!msg)
1982                 return NULL;
1983
1984         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1985                     0, NL80211_CMD_GET_WIPHY, 0);
1986
1987         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1988
1989         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1990                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1991  nla_put_failure:
1992         return NULL;
1993 }
1994
1995
1996 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1997                                          const void *data, size_t len,
1998                                          int encrypt)
1999 {
2000         __u8 rtap_hdr[] = {
2001                 0x00, 0x00, /* radiotap version */
2002                 0x0e, 0x00, /* radiotap length */
2003                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2004                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2005                 0x00,       /* padding */
2006                 0x00, 0x00, /* RX and TX flags to indicate that */
2007                 0x00, 0x00, /* this is the injected frame directly */
2008         };
2009         struct iovec iov[2] = {
2010                 {
2011                         .iov_base = &rtap_hdr,
2012                         .iov_len = sizeof(rtap_hdr),
2013                 },
2014                 {
2015                         .iov_base = (void *) data,
2016                         .iov_len = len,
2017                 }
2018         };
2019         struct msghdr msg = {
2020                 .msg_name = NULL,
2021                 .msg_namelen = 0,
2022                 .msg_iov = iov,
2023                 .msg_iovlen = 2,
2024                 .msg_control = NULL,
2025                 .msg_controllen = 0,
2026                 .msg_flags = 0,
2027         };
2028
2029         if (encrypt)
2030                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2031
2032         return sendmsg(drv->monitor_sock, &msg, 0);
2033 }
2034
2035
2036 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2037                                         size_t data_len)
2038 {
2039         struct wpa_driver_nl80211_data *drv = priv;
2040         struct ieee80211_mgmt *mgmt;
2041         int do_not_encrypt = 0;
2042         u16 fc;
2043
2044         mgmt = (struct ieee80211_mgmt *) data;
2045         fc = le_to_host16(mgmt->frame_control);
2046
2047         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2048             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2049                 /*
2050                  * Only one of the authentication frame types is encrypted.
2051                  * In order for static WEP encryption to work properly (i.e.,
2052                  * to not encrypt the frame), we need to tell mac80211 about
2053                  * the frames that must not be encrypted.
2054                  */
2055                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2056                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2057                 if (auth_alg == WLAN_AUTH_OPEN ||
2058                     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2059                         do_not_encrypt = 1;
2060         }
2061
2062         return wpa_driver_nl80211_send_frame(drv, data, data_len,
2063                                              !do_not_encrypt);
2064 }
2065
2066
2067 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2068                                                const u8 *head, size_t head_len,
2069                                                const u8 *tail, size_t tail_len,
2070                                                int dtim_period)
2071 {
2072         struct wpa_driver_nl80211_data *drv = priv;
2073         struct nl_msg *msg;
2074         u8 cmd = NL80211_CMD_NEW_BEACON;
2075         int ret;
2076         int beacon_set;
2077 #ifdef HOSTAPD
2078         struct i802_bss *bss;
2079
2080         bss = get_bss(drv, ifindex);
2081         if (bss == NULL)
2082                 return -ENOENT;
2083         beacon_set = bss->beacon_set;
2084 #else /* HOSTAPD */
2085         beacon_set = drv->beacon_set;
2086 #endif /* HOSTAPD */
2087
2088         msg = nlmsg_alloc();
2089         if (!msg)
2090                 return -ENOMEM;
2091
2092         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2093                    beacon_set);
2094         if (beacon_set)
2095                 cmd = NL80211_CMD_SET_BEACON;
2096
2097         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2098                     0, cmd, 0);
2099         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2100         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2101         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2102         if (!drv->beacon_int)
2103                 drv->beacon_int = 100;
2104         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2105         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2106
2107         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2108         if (ret) {
2109                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2110                            ret, strerror(-ret));
2111         } else {
2112 #ifdef HOSTAPD
2113                 bss->beacon_set = 1;
2114 #else /* HOSTAPD */
2115                 drv->beacon_set = 1;
2116 #endif /* HOSTAPD */
2117         }
2118         return ret;
2119  nla_put_failure:
2120         return -ENOBUFS;
2121 }
2122
2123
2124 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2125 {
2126         struct wpa_driver_nl80211_data *drv = priv;
2127         struct nl_msg *msg;
2128
2129         drv->beacon_int = value;
2130
2131 #ifdef HOSTAPD
2132         if (!drv->bss.beacon_set)
2133                 return 0;
2134 #else /* HOSTAPD */
2135         if (!drv->beacon_set)
2136                 return 0;
2137 #endif /* HOSTAPD */
2138
2139         msg = nlmsg_alloc();
2140         if (!msg)
2141                 return -ENOMEM;
2142
2143         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2144         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2145                     0, NL80211_CMD_SET_BEACON, 0);
2146         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2147
2148         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2149
2150         return send_and_recv_msgs(drv, msg, NULL, NULL);
2151  nla_put_failure:
2152         return -ENOBUFS;
2153 }
2154
2155
2156 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2157                                        int freq, int ht_enabled,
2158                                        int sec_channel_offset)
2159 {
2160         struct nl_msg *msg;
2161         int ret;
2162
2163         msg = nlmsg_alloc();
2164         if (!msg)
2165                 return -1;
2166
2167         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2168                     NL80211_CMD_SET_WIPHY, 0);
2169
2170         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2171         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2172         if (ht_enabled) {
2173                 switch (sec_channel_offset) {
2174                 case -1:
2175                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2176                                     NL80211_CHAN_HT40MINUS);
2177                         break;
2178                 case 1:
2179                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2180                                     NL80211_CHAN_HT40PLUS);
2181                         break;
2182                 default:
2183                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2184                                     NL80211_CHAN_HT20);
2185                         break;
2186                 }
2187         }
2188
2189         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2190         if (ret == 0)
2191                 return 0;
2192         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2193                    "%d (%s)", freq, ret, strerror(-ret));
2194 nla_put_failure:
2195         return -1;
2196 }
2197
2198 #endif /* CONFIG_AP || HOSTAPD */
2199
2200
2201 #ifdef CONFIG_AP
2202
2203 static int wpa_driver_nl80211_set_beacon(void *priv,
2204                                          const u8 *head, size_t head_len,
2205                                          const u8 *tail, size_t tail_len,
2206                                          int dtim_period)
2207 {
2208         struct wpa_driver_nl80211_data *drv = priv;
2209         return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2210                                                    head, head_len,
2211                                                    tail, tail_len,
2212                                                    dtim_period);
2213 }
2214
2215 #endif /* CONFIG_AP */
2216
2217 #if defined(CONFIG_AP) || defined(HOSTAPD)
2218
2219 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2220                                  int ifidx)
2221 {
2222         struct nl_msg *msg;
2223
2224 #ifdef HOSTAPD
2225         /* stop listening for EAPOL on this interface */
2226         del_ifidx(drv, ifidx);
2227 #endif /* HOSTAPD */
2228
2229         msg = nlmsg_alloc();
2230         if (!msg)
2231                 goto nla_put_failure;
2232
2233         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2234                     0, NL80211_CMD_DEL_INTERFACE, 0);
2235         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2236
2237         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2238                 return;
2239  nla_put_failure:
2240         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2241                    ifidx);
2242 }
2243
2244
2245 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2246                                 const char *ifname, enum nl80211_iftype iftype,
2247                                 const u8 *addr)
2248 {
2249         struct nl_msg *msg, *flags = NULL;
2250         int ifidx;
2251         int ret = -ENOBUFS;
2252 #ifdef HOSTAPD
2253         struct ifreq ifreq;
2254         struct iwreq iwr;
2255 #endif /* HOSTAPD */
2256
2257         msg = nlmsg_alloc();
2258         if (!msg)
2259                 return -1;
2260
2261         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2262                     0, NL80211_CMD_NEW_INTERFACE, 0);
2263         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2264         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2265         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2266
2267         if (iftype == NL80211_IFTYPE_MONITOR) {
2268                 int err;
2269
2270                 flags = nlmsg_alloc();
2271                 if (!flags)
2272                         goto nla_put_failure;
2273
2274                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2275
2276                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2277
2278                 nlmsg_free(flags);
2279
2280                 if (err)
2281                         goto nla_put_failure;
2282         }
2283
2284         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2285         if (ret) {
2286  nla_put_failure:
2287                 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2288                            ifname);
2289                 return ret;
2290         }
2291
2292         ifidx = if_nametoindex(ifname);
2293
2294         if (ifidx <= 0)
2295                 return -1;
2296
2297 #ifdef HOSTAPD
2298         /* start listening for EAPOL on this interface */
2299         add_ifidx(drv, ifidx);
2300
2301         if (addr) {
2302                 switch (iftype) {
2303                 case NL80211_IFTYPE_AP:
2304                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
2305                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
2306                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2307
2308                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
2309                                 nl80211_remove_iface(drv, ifidx);
2310                                 return -1;
2311                         }
2312                         break;
2313                 case NL80211_IFTYPE_WDS:
2314                         memset(&iwr, 0, sizeof(iwr));
2315                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
2316                         iwr.u.addr.sa_family = ARPHRD_ETHER;
2317                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
2318                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
2319                                 return -1;
2320                         break;
2321                 default:
2322                         /* nothing */
2323                         break;
2324                 }
2325         }
2326 #endif /* HOSTAPD */
2327
2328         return ifidx;
2329 }
2330
2331 #endif /* CONFIG_AP || HOSTAPD */
2332
2333 #ifdef CONFIG_AP
2334
2335 void ap_tx_status(void *ctx, const u8 *addr,
2336                   const u8 *buf, size_t len, int ack);
2337 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2338 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2339                 struct hostapd_frame_info *fi);
2340 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2341
2342 #endif /* CONFIG_AP */
2343
2344 #if defined(CONFIG_AP) || defined(HOSTAPD)
2345
2346 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2347 {
2348         struct ieee80211_hdr *hdr;
2349         u16 fc, type, stype;
2350
2351         hdr = (struct ieee80211_hdr *) buf;
2352         fc = le_to_host16(hdr->frame_control);
2353
2354         type = WLAN_FC_GET_TYPE(fc);
2355         stype = WLAN_FC_GET_STYPE(fc);
2356
2357         switch (type) {
2358         case WLAN_FC_TYPE_MGMT:
2359                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2360                            ok ? "ACK" : "fail");
2361 #ifdef HOSTAPD
2362                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2363 #else /* HOSTAPD */
2364                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2365 #endif /* HOSTAPD */
2366                 break;
2367         case WLAN_FC_TYPE_CTRL:
2368                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2369                            ok ? "ACK" : "fail");
2370                 break;
2371         case WLAN_FC_TYPE_DATA:
2372 #ifdef HOSTAPD
2373                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2374 #else /* HOSTAPD */
2375                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2376 #endif /* HOSTAPD */
2377                 break;
2378         default:
2379                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2380                            type);
2381                 break;
2382         }
2383 }
2384
2385
2386 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2387                          u8 *buf, size_t len,
2388                          struct hostapd_frame_info *hfi,
2389                          enum ieee80211_msg_type msg_type)
2390 {
2391         struct ieee80211_hdr *hdr;
2392         u16 fc, type, stype;
2393         size_t data_len = len;
2394         u8 *bssid;
2395         void *ctx = drv->ctx;
2396 #ifdef HOSTAPD
2397         struct hostapd_iface *iface = drv->hapd->iface;
2398         struct hostapd_data *hapd = NULL;
2399         int broadcast_bssid = 0;
2400         size_t i;
2401 #endif /* HOSTAPD */
2402
2403         /*
2404          * PS-Poll frames are 16 bytes. All other frames are
2405          * 24 bytes or longer.
2406          */
2407         if (len < 16)
2408                 return;
2409
2410         hdr = (struct ieee80211_hdr *) buf;
2411         fc = le_to_host16(hdr->frame_control);
2412
2413         type = WLAN_FC_GET_TYPE(fc);
2414         stype = WLAN_FC_GET_STYPE(fc);
2415
2416         switch (type) {
2417         case WLAN_FC_TYPE_DATA:
2418                 if (len < 24)
2419                         return;
2420                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2421                 case WLAN_FC_TODS:
2422                         bssid = hdr->addr1;
2423                         break;
2424                 case WLAN_FC_FROMDS:
2425                         bssid = hdr->addr2;
2426                         break;
2427                 default:
2428                         /* discard */
2429                         return;
2430                 }
2431                 break;
2432         case WLAN_FC_TYPE_CTRL:
2433                 /* discard non-ps-poll frames */
2434                 if (stype != WLAN_FC_STYPE_PSPOLL)
2435                         return;
2436                 bssid = hdr->addr1;
2437                 break;
2438         case WLAN_FC_TYPE_MGMT:
2439                 bssid = hdr->addr3;
2440                 break;
2441         default:
2442                 /* discard */
2443                 return;
2444         }
2445
2446 #ifdef HOSTAPD
2447         /* find interface frame belongs to */
2448         for (i = 0; i < iface->num_bss; i++) {
2449                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
2450                         hapd = iface->bss[i];
2451                         break;
2452                 }
2453         }
2454
2455         if (hapd == NULL) {
2456                 hapd = iface->bss[0];
2457
2458                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
2459                     bssid[2] != 0xff || bssid[3] != 0xff ||
2460                     bssid[4] != 0xff || bssid[5] != 0xff) {
2461                         /*
2462                          * Unknown BSSID - drop frame if this is not from
2463                          * passive scanning or a beacon (at least ProbeReq
2464                          * frames to other APs may be allowed through RX
2465                          * filtering in the wlan hw/driver)
2466                          */
2467                         if ((type != WLAN_FC_TYPE_MGMT ||
2468                              stype != WLAN_FC_STYPE_BEACON))
2469                                 return;
2470                 } else
2471                         broadcast_bssid = 1;
2472         }
2473         ctx = hapd;
2474 #endif /* HOSTAPD */
2475
2476         switch (msg_type) {
2477         case ieee80211_msg_normal:
2478                 /* continue processing */
2479                 break;
2480         case ieee80211_msg_tx_callback_ack:
2481                 handle_tx_callback(ctx, buf, data_len, 1);
2482                 return;
2483         case ieee80211_msg_tx_callback_fail:
2484                 handle_tx_callback(ctx, buf, data_len, 0);
2485                 return;
2486         }
2487
2488         switch (type) {
2489         case WLAN_FC_TYPE_MGMT:
2490                 if (stype != WLAN_FC_STYPE_BEACON &&
2491                     stype != WLAN_FC_STYPE_PROBE_REQ)
2492                         wpa_printf(MSG_MSGDUMP, "MGMT");
2493 #ifdef HOSTAPD
2494                 if (broadcast_bssid) {
2495                         for (i = 0; i < iface->num_bss; i++)
2496                                 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
2497                                                 stype, hfi);
2498                 } else
2499                         hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
2500 #else /* HOSTAPD */
2501                 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2502 #endif /* HOSTAPD */
2503                 break;
2504         case WLAN_FC_TYPE_CTRL:
2505                 /* can only get here with PS-Poll frames */
2506                 wpa_printf(MSG_DEBUG, "CTRL");
2507 #ifdef HOSTAPD
2508                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
2509 #else /* HOSTAPD */
2510                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2511 #endif /* HOSTAPD */
2512                 break;
2513         case WLAN_FC_TYPE_DATA:
2514 #ifdef HOSTAPD
2515                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
2516 #else /* HOSTAPD */
2517                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2518 #endif /* HOSTAPD */
2519                 break;
2520         }
2521 }
2522
2523
2524 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2525 {
2526         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2527         int len;
2528         unsigned char buf[3000];
2529         struct ieee80211_radiotap_iterator iter;
2530         int ret;
2531         struct hostapd_frame_info hfi;
2532         int injected = 0, failed = 0, msg_type, rxflags = 0;
2533
2534         len = recv(sock, buf, sizeof(buf), 0);
2535         if (len < 0) {
2536                 perror("recv");
2537                 return;
2538         }
2539
2540         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2541                 printf("received invalid radiotap frame\n");
2542                 return;
2543         }
2544
2545         memset(&hfi, 0, sizeof(hfi));
2546
2547         while (1) {
2548                 ret = ieee80211_radiotap_iterator_next(&iter);
2549                 if (ret == -ENOENT)
2550                         break;
2551                 if (ret) {
2552                         printf("received invalid radiotap frame (%d)\n", ret);
2553                         return;
2554                 }
2555                 switch (iter.this_arg_index) {
2556                 case IEEE80211_RADIOTAP_FLAGS:
2557                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2558                                 len -= 4;
2559                         break;
2560                 case IEEE80211_RADIOTAP_RX_FLAGS:
2561                         rxflags = 1;
2562                         break;
2563                 case IEEE80211_RADIOTAP_TX_FLAGS:
2564                         injected = 1;
2565                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2566                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2567                         break;
2568                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2569                         break;
2570                 case IEEE80211_RADIOTAP_CHANNEL:
2571                         /* TODO convert from freq/flags to channel number
2572                         hfi.channel = XXX;
2573                         hfi.phytype = XXX;
2574                          */
2575                         break;
2576                 case IEEE80211_RADIOTAP_RATE:
2577                         hfi.datarate = *iter.this_arg * 5;
2578                         break;
2579                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2580                         hfi.ssi_signal = *iter.this_arg;
2581                         break;
2582                 }
2583         }
2584
2585         if (rxflags && injected)
2586                 return;
2587
2588         if (!injected)
2589                 msg_type = ieee80211_msg_normal;
2590         else if (failed)
2591                 msg_type = ieee80211_msg_tx_callback_fail;
2592         else
2593                 msg_type = ieee80211_msg_tx_callback_ack;
2594
2595         handle_frame(drv, buf + iter.max_length,
2596                      len - iter.max_length, &hfi, msg_type);
2597 }
2598
2599
2600 /*
2601  * we post-process the filter code later and rewrite
2602  * this to the offset to the last instruction
2603  */
2604 #define PASS    0xFF
2605 #define FAIL    0xFE
2606
2607 static struct sock_filter msock_filter_insns[] = {
2608         /*
2609          * do a little-endian load of the radiotap length field
2610          */
2611         /* load lower byte into A */
2612         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2613         /* put it into X (== index register) */
2614         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2615         /* load upper byte into A */
2616         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2617         /* left-shift it by 8 */
2618         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2619         /* or with X */
2620         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2621         /* put result into X */
2622         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2623
2624         /*
2625          * Allow management frames through, this also gives us those
2626          * management frames that we sent ourselves with status
2627          */
2628         /* load the lower byte of the IEEE 802.11 frame control field */
2629         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2630         /* mask off frame type and version */
2631         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2632         /* accept frame if it's both 0, fall through otherwise */
2633         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2634
2635         /*
2636          * TODO: add a bit to radiotap RX flags that indicates
2637          * that the sending station is not associated, then
2638          * add a filter here that filters on our DA and that flag
2639          * to allow us to deauth frames to that bad station.
2640          *
2641          * Not a regression -- we didn't do it before either.
2642          */
2643
2644 #if 0
2645         /*
2646          * drop non-data frames, WDS frames
2647          */
2648         /* load the lower byte of the frame control field */
2649         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2650         /* mask off QoS bit */
2651         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2652         /* drop non-data frames */
2653         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2654         /* load the upper byte of the frame control field */
2655         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2656         /* mask off toDS/fromDS */
2657         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2658         /* drop WDS frames */
2659         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2660 #endif
2661
2662         /*
2663          * add header length to index
2664          */
2665         /* load the lower byte of the frame control field */
2666         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2667         /* mask off QoS bit */
2668         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2669         /* right shift it by 6 to give 0 or 2 */
2670         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2671         /* add data frame header length */
2672         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2673         /* add index, was start of 802.11 header */
2674         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2675         /* move to index, now start of LL header */
2676         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2677
2678         /*
2679          * Accept empty data frames, we use those for
2680          * polling activity.
2681          */
2682         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2683         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2684
2685         /*
2686          * Accept EAPOL frames
2687          */
2688         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2689         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2690         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2691         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2692
2693         /* keep these last two statements or change the code below */
2694         /* return 0 == "DROP" */
2695         BPF_STMT(BPF_RET | BPF_K, 0),
2696         /* return ~0 == "keep all" */
2697         BPF_STMT(BPF_RET | BPF_K, ~0),
2698 };
2699
2700 static struct sock_fprog msock_filter = {
2701         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2702         .filter = msock_filter_insns,
2703 };
2704
2705
2706 static int add_monitor_filter(int s)
2707 {
2708         int idx;
2709
2710         /* rewrite all PASS/FAIL jump offsets */
2711         for (idx = 0; idx < msock_filter.len; idx++) {
2712                 struct sock_filter *insn = &msock_filter_insns[idx];
2713
2714                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2715                         if (insn->code == (BPF_JMP|BPF_JA)) {
2716                                 if (insn->k == PASS)
2717                                         insn->k = msock_filter.len - idx - 2;
2718                                 else if (insn->k == FAIL)
2719                                         insn->k = msock_filter.len - idx - 3;
2720                         }
2721
2722                         if (insn->jt == PASS)
2723                                 insn->jt = msock_filter.len - idx - 2;
2724                         else if (insn->jt == FAIL)
2725                                 insn->jt = msock_filter.len - idx - 3;
2726
2727                         if (insn->jf == PASS)
2728                                 insn->jf = msock_filter.len - idx - 2;
2729                         else if (insn->jf == FAIL)
2730                                 insn->jf = msock_filter.len - idx - 3;
2731                 }
2732         }
2733
2734         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2735                        &msock_filter, sizeof(msock_filter))) {
2736                 perror("SO_ATTACH_FILTER");
2737                 return -1;
2738         }
2739
2740         return 0;
2741 }
2742
2743
2744 static int
2745 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2746 {
2747         char buf[IFNAMSIZ];
2748         struct sockaddr_ll ll;
2749         int optval;
2750         socklen_t optlen;
2751
2752         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2753         buf[IFNAMSIZ - 1] = '\0';
2754
2755         drv->monitor_ifidx =
2756                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2757
2758         if (drv->monitor_ifidx < 0)
2759                 return -1;
2760
2761         if (hostapd_set_iface_flags(drv, buf, 1))
2762                 goto error;
2763
2764         memset(&ll, 0, sizeof(ll));
2765         ll.sll_family = AF_PACKET;
2766         ll.sll_ifindex = drv->monitor_ifidx;
2767         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2768         if (drv->monitor_sock < 0) {
2769                 perror("socket[PF_PACKET,SOCK_RAW]");
2770                 goto error;
2771         }
2772
2773         if (add_monitor_filter(drv->monitor_sock)) {
2774                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2775                            "interface; do filtering in user space");
2776                 /* This works, but will cost in performance. */
2777         }
2778
2779         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2780                 perror("monitor socket bind");
2781                 goto error;
2782         }
2783
2784         optlen = sizeof(optval);
2785         optval = 20;
2786         if (setsockopt
2787             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2788                 perror("Failed to set socket priority");
2789                 goto error;
2790         }
2791
2792         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2793                                      drv, NULL)) {
2794                 printf("Could not register monitor read socket\n");
2795                 goto error;
2796         }
2797
2798         return 0;
2799  error:
2800         nl80211_remove_iface(drv, drv->monitor_ifidx);
2801         return -1;
2802 }
2803
2804 #endif /* CONFIG_AP || HOSTAPD */
2805
2806 #ifdef CONFIG_AP
2807
2808 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2809                                  struct wpa_driver_associate_params *params)
2810 {
2811         if (drv->monitor_ifidx < 0 &&
2812             nl80211_create_monitor_interface(drv))
2813                 return -1;
2814
2815         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2816             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
2817                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2818                 drv->monitor_ifidx = -1;
2819                 return -1;
2820         }
2821
2822         /* TODO: setup monitor interface (and add code somewhere to remove this
2823          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2824
2825         return 0;
2826 }
2827 #endif /* CONFIG_AP */
2828
2829
2830 static int wpa_driver_nl80211_associate(
2831         void *priv, struct wpa_driver_associate_params *params)
2832 {
2833         struct wpa_driver_nl80211_data *drv = priv;
2834         int ret = -1;
2835         struct nl_msg *msg;
2836
2837 #ifdef CONFIG_AP
2838         if (params->mode == 2)
2839                 return wpa_driver_nl80211_ap(drv, params);
2840 #endif /* CONFIG_AP */
2841
2842         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2843                                           params->drop_unencrypted);
2844
2845         drv->associated = 0;
2846
2847         msg = nlmsg_alloc();
2848         if (!msg)
2849                 return -1;
2850
2851         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2852                    drv->ifindex);
2853         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2854                     NL80211_CMD_ASSOCIATE, 0);
2855
2856         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2857         if (params->bssid) {
2858                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2859                            MAC2STR(params->bssid));
2860                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2861         }
2862         if (params->freq) {
2863                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2864                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2865         }
2866         if (params->ssid) {
2867                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2868                                   params->ssid, params->ssid_len);
2869                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2870                         params->ssid);
2871                 if (params->ssid_len > sizeof(drv->ssid))
2872                         goto nla_put_failure;
2873                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2874                 drv->ssid_len = params->ssid_len;
2875         }
2876         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
2877         if (params->wpa_ie)
2878                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2879                         params->wpa_ie);
2880
2881         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2882         msg = NULL;
2883         if (ret) {
2884                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2885                            "(%s)", ret, strerror(-ret));
2886                 goto nla_put_failure;
2887         }
2888         ret = 0;
2889         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2890                    "successfully");
2891
2892 nla_put_failure:
2893         nlmsg_free(msg);
2894         return ret;
2895 }
2896
2897
2898 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2899                             int ifindex, int mode)
2900 {
2901         struct nl_msg *msg;
2902         int ret = -ENOBUFS;
2903
2904         msg = nlmsg_alloc();
2905         if (!msg)
2906                 return -ENOMEM;
2907
2908         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2909                     0, NL80211_CMD_SET_INTERFACE, 0);
2910         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2911         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
2912
2913         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2914         if (!ret)
2915                 return 0;
2916 nla_put_failure:
2917         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
2918                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
2919         return ret;
2920 }
2921
2922
2923 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
2924 {
2925         struct wpa_driver_nl80211_data *drv = priv;
2926         int ret = -1;
2927         int nlmode;
2928
2929         switch (mode) {
2930         case 0:
2931                 nlmode = NL80211_IFTYPE_STATION;
2932                 break;
2933         case 1:
2934                 nlmode = NL80211_IFTYPE_ADHOC;
2935                 break;
2936         case 2:
2937                 nlmode = NL80211_IFTYPE_AP;
2938                 break;
2939         default:
2940                 return -1;
2941         }
2942
2943         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
2944                 drv->nlmode = nlmode;
2945                 return 0;
2946         }
2947
2948         if (nlmode == drv->nlmode)
2949                 return 0; /* Already in the requested mode */
2950
2951         /* mac80211 doesn't allow mode changes while the device is up, so
2952          * take the device down, try to set the mode again, and bring the
2953          * device back up.
2954          */
2955         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2956                 /* Try to set the mode again while the interface is down */
2957                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
2958                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2959                         ret = -1;
2960         }
2961
2962         if (!ret)
2963                 drv->nlmode = nlmode;
2964
2965         return ret;
2966 }
2967
2968
2969 static int wpa_driver_nl80211_get_capa(void *priv,
2970                                        struct wpa_driver_capa *capa)
2971 {
2972         struct wpa_driver_nl80211_data *drv = priv;
2973         if (!drv->has_capability)
2974                 return -1;
2975         os_memcpy(capa, &drv->capa, sizeof(*capa));
2976         return 0;
2977 }
2978
2979
2980 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2981 {
2982         struct wpa_driver_nl80211_data *drv = priv;
2983
2984         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2985                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2986         drv->operstate = state;
2987         return wpa_driver_nl80211_send_oper_ifla(
2988                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2989 }
2990
2991
2992 #ifdef HOSTAPD
2993
2994 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2995
2996 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2997 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2998
2999
3000 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3001                                  int ifindex)
3002 {
3003         struct i802_bss *bss = &drv->bss;
3004         while (bss) {
3005                 if (ifindex == bss->ifindex)
3006                         return bss;
3007                 bss = bss->next;
3008         }
3009         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3010         return NULL;
3011 }
3012
3013
3014 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3015 {
3016         int i;
3017         int *old;
3018
3019         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3020                    ifidx);
3021         for (i = 0; i < drv->num_if_indices; i++) {
3022                 if (drv->if_indices[i] == 0) {
3023                         drv->if_indices[i] = ifidx;
3024                         return;
3025                 }
3026         }
3027
3028         if (drv->if_indices != drv->default_if_indices)
3029                 old = drv->if_indices;
3030         else
3031                 old = NULL;
3032
3033         drv->if_indices = realloc(old,
3034                                   sizeof(int) * (drv->num_if_indices + 1));
3035         if (!drv->if_indices) {
3036                 if (!old)
3037                         drv->if_indices = drv->default_if_indices;
3038                 else
3039                         drv->if_indices = old;
3040                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3041                            "interfaces");
3042                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3043                 return;
3044         }
3045         drv->if_indices[drv->num_if_indices] = ifidx;
3046         drv->num_if_indices++;
3047 }
3048
3049
3050 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3051 {
3052         int i;
3053
3054         for (i = 0; i < drv->num_if_indices; i++) {
3055                 if (drv->if_indices[i] == ifidx) {
3056                         drv->if_indices[i] = 0;
3057                         break;
3058                 }
3059         }
3060 }
3061
3062
3063 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3064 {
3065         int i;
3066
3067         for (i = 0; i < drv->num_if_indices; i++)
3068                 if (drv->if_indices[i] == ifidx)
3069                         return 1;
3070
3071         return 0;
3072 }
3073
3074
3075 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3076                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3077                         size_t seq_len, const u8 *key, size_t key_len)
3078 {
3079         struct wpa_driver_nl80211_data *drv = priv;
3080         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3081                            set_tx, seq, seq_len, key, key_len);
3082 }
3083
3084
3085 static inline int min_int(int a, int b)
3086 {
3087         if (a < b)
3088                 return a;
3089         return b;
3090 }
3091
3092
3093 static int get_key_handler(struct nl_msg *msg, void *arg)
3094 {
3095         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3096         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3097
3098         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3099                   genlmsg_attrlen(gnlh, 0), NULL);
3100
3101         /*
3102          * TODO: validate the key index and mac address!
3103          * Otherwise, there's a race condition as soon as
3104          * the kernel starts sending key notifications.
3105          */
3106
3107         if (tb[NL80211_ATTR_KEY_SEQ])
3108                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3109                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3110         return NL_SKIP;
3111 }
3112
3113
3114 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3115                            int idx, u8 *seq)
3116 {
3117         struct wpa_driver_nl80211_data *drv = priv;
3118         struct nl_msg *msg;
3119
3120         msg = nlmsg_alloc();
3121         if (!msg)
3122                 return -ENOMEM;
3123
3124         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3125                     0, NL80211_CMD_GET_KEY, 0);
3126
3127         if (addr)
3128                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3129         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3130         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3131
3132         memset(seq, 0, 6);
3133
3134         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3135  nla_put_failure:
3136         return -ENOBUFS;
3137 }
3138
3139
3140 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3141                               int mode)
3142 {
3143         struct wpa_driver_nl80211_data *drv = priv;
3144         struct nl_msg *msg;
3145         u8 rates[NL80211_MAX_SUPP_RATES];
3146         u8 rates_len = 0;
3147         int i;
3148
3149         msg = nlmsg_alloc();
3150         if (!msg)
3151                 return -ENOMEM;
3152
3153         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3154                     NL80211_CMD_SET_BSS, 0);
3155
3156         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3157                 rates[rates_len++] = basic_rates[i] / 5;
3158
3159         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3160
3161         /* TODO: multi-BSS support */
3162         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3163
3164         return send_and_recv_msgs(drv, msg, NULL, NULL);
3165  nla_put_failure:
3166         return -ENOBUFS;
3167 }
3168
3169
3170 /* Set kernel driver on given frequency (MHz) */
3171 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3172 {
3173         struct wpa_driver_nl80211_data *drv = priv;
3174         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3175                                            freq->sec_channel_offset);
3176 }
3177
3178
3179 static int i802_set_rts(void *priv, int rts)
3180 {
3181         struct wpa_driver_nl80211_data *drv = priv;
3182         struct iwreq iwr;
3183
3184         memset(&iwr, 0, sizeof(iwr));
3185         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3186         iwr.u.rts.value = rts;
3187         iwr.u.rts.fixed = 1;
3188
3189         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3190                 perror("ioctl[SIOCSIWRTS]");
3191                 return -1;
3192         }
3193
3194         return 0;
3195 }
3196
3197
3198 static int i802_set_frag(void *priv, int frag)
3199 {
3200         struct wpa_driver_nl80211_data *drv = priv;
3201         struct iwreq iwr;
3202
3203         memset(&iwr, 0, sizeof(iwr));
3204         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3205         iwr.u.frag.value = frag;
3206         iwr.u.frag.fixed = 1;
3207
3208         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3209                 perror("ioctl[SIOCSIWFRAG]");
3210                 return -1;
3211         }
3212
3213         return 0;
3214 }
3215
3216
3217 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3218 {
3219         struct wpa_driver_nl80211_data *drv = priv;
3220         struct iwreq iwr;
3221
3222         memset(&iwr, 0, sizeof(iwr));
3223         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3224
3225         iwr.u.retry.value = short_retry;
3226         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3227         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3228                 perror("ioctl[SIOCSIWRETRY(short)]");
3229                 return -1;
3230         }
3231
3232         iwr.u.retry.value = long_retry;
3233         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3234         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3235                 perror("ioctl[SIOCSIWRETRY(long)]");
3236                 return -1;
3237         }
3238
3239         return 0;
3240 }
3241
3242
3243 static int i802_flush(void *priv)
3244 {
3245         struct wpa_driver_nl80211_data *drv = priv;
3246         struct nl_msg *msg;
3247
3248         msg = nlmsg_alloc();
3249         if (!msg)
3250                 return -1;
3251
3252         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3253                     0, NL80211_CMD_DEL_STATION, 0);
3254
3255         /*
3256          * XXX: FIX! this needs to flush all VLANs too
3257          */
3258         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3259                     if_nametoindex(drv->ifname));
3260
3261         return send_and_recv_msgs(drv, msg, NULL, NULL);
3262  nla_put_failure:
3263         return -ENOBUFS;
3264 }
3265
3266
3267 static int get_sta_handler(struct nl_msg *msg, void *arg)
3268 {
3269         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3270         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3271         struct hostap_sta_driver_data *data = arg;
3272         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3273         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3274                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3275                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3276                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3277                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3278                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3279         };
3280
3281         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3282                   genlmsg_attrlen(gnlh, 0), NULL);
3283
3284         /*
3285          * TODO: validate the interface and mac address!
3286          * Otherwise, there's a race condition as soon as
3287          * the kernel starts sending station notifications.
3288          */
3289
3290         if (!tb[NL80211_ATTR_STA_INFO]) {
3291                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3292                 return NL_SKIP;
3293         }
3294         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3295                              tb[NL80211_ATTR_STA_INFO],
3296                              stats_policy)) {
3297                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3298                 return NL_SKIP;
3299         }
3300
3301         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3302                 data->inactive_msec =
3303                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3304         if (stats[NL80211_STA_INFO_RX_BYTES])
3305                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3306         if (stats[NL80211_STA_INFO_TX_BYTES])
3307                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3308         if (stats[NL80211_STA_INFO_RX_PACKETS])
3309                 data->rx_packets =
3310                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3311         if (stats[NL80211_STA_INFO_TX_PACKETS])
3312                 data->tx_packets =
3313                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3314
3315         return NL_SKIP;
3316 }
3317
3318 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3319                               const u8 *addr)
3320 {
3321         struct wpa_driver_nl80211_data *drv = priv;
3322         struct nl_msg *msg;
3323
3324         os_memset(data, 0, sizeof(*data));
3325         msg = nlmsg_alloc();
3326         if (!msg)
3327                 return -ENOMEM;
3328
3329         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3330                     0, NL80211_CMD_GET_STATION, 0);
3331
3332         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3333         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3334
3335         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3336  nla_put_failure:
3337         return -ENOBUFS;
3338 }
3339
3340
3341 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3342                            size_t data_len, int encrypt, const u8 *own_addr)
3343 {
3344         struct wpa_driver_nl80211_data *drv = priv;
3345         struct ieee80211_hdr *hdr;
3346         size_t len;
3347         u8 *pos;
3348         int res;
3349 #if 0 /* FIX */
3350         int qos = sta->flags & WLAN_STA_WME;
3351 #else
3352         int qos = 0;
3353 #endif
3354
3355         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3356                 data_len;
3357         hdr = os_zalloc(len);
3358         if (hdr == NULL) {
3359                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3360                        (unsigned long) len);
3361                 return -1;
3362         }
3363
3364         hdr->frame_control =
3365                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3366         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3367         if (encrypt)
3368                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3369 #if 0 /* To be enabled if qos determination is added above */
3370         if (qos) {
3371                 hdr->frame_control |=
3372                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3373         }
3374 #endif
3375
3376         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3377         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3378         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3379         pos = (u8 *) (hdr + 1);
3380
3381 #if 0 /* To be enabled if qos determination is added above */
3382         if (qos) {
3383                 /* add an empty QoS header if needed */
3384                 pos[0] = 0;
3385                 pos[1] = 0;
3386                 pos += 2;
3387         }
3388 #endif
3389
3390         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3391         pos += sizeof(rfc1042_header);
3392         WPA_PUT_BE16(pos, ETH_P_PAE);
3393         pos += 2;
3394         memcpy(pos, data, data_len);
3395
3396         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3397         if (res < 0) {
3398                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3399                            "failed: %d (%s)",
3400                            (unsigned long) len, errno, strerror(errno));
3401         }
3402         free(hdr);
3403
3404         return res;
3405 }
3406
3407
3408 static int i802_sta_add(const char *ifname, void *priv,
3409                         struct hostapd_sta_add_params *params)
3410 {
3411         struct wpa_driver_nl80211_data *drv = priv;
3412         struct nl_msg *msg;
3413         int ret = -ENOBUFS;
3414
3415         msg = nlmsg_alloc();
3416         if (!msg)
3417                 return -ENOMEM;
3418
3419         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3420                     0, NL80211_CMD_NEW_STATION, 0);
3421
3422         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3423                     if_nametoindex(drv->ifname));
3424         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3425         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3426         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3427                 params->supp_rates);
3428         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3429                     params->listen_interval);
3430
3431 #ifdef CONFIG_IEEE80211N
3432         if (params->ht_capabilities) {
3433                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3434                         params->ht_capabilities->length,
3435                         &params->ht_capabilities->data);
3436         }
3437 #endif /* CONFIG_IEEE80211N */
3438
3439         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3440         if (ret)
3441                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3442                            "result: %d (%s)", ret, strerror(-ret));
3443         if (ret == -EEXIST)
3444                 ret = 0;
3445  nla_put_failure:
3446         return ret;
3447 }
3448
3449
3450 static int i802_sta_remove(void *priv, const u8 *addr)
3451 {
3452         struct wpa_driver_nl80211_data *drv = priv;
3453         struct nl_msg *msg;
3454         int ret;
3455
3456         msg = nlmsg_alloc();
3457         if (!msg)
3458                 return -ENOMEM;
3459
3460         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3461                     0, NL80211_CMD_DEL_STATION, 0);
3462
3463         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3464                     if_nametoindex(drv->ifname));
3465         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3466
3467         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3468         if (ret == -ENOENT)
3469                 return 0;
3470         return ret;
3471  nla_put_failure:
3472         return -ENOBUFS;
3473 }
3474
3475
3476 static int i802_sta_set_flags(void *priv, const u8 *addr,
3477                               int total_flags, int flags_or, int flags_and)
3478 {
3479         struct wpa_driver_nl80211_data *drv = priv;
3480         struct nl_msg *msg, *flags = NULL;
3481
3482         msg = nlmsg_alloc();
3483         if (!msg)
3484                 return -ENOMEM;
3485
3486         flags = nlmsg_alloc();
3487         if (!flags) {
3488                 nlmsg_free(msg);
3489                 return -ENOMEM;
3490         }
3491
3492         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3493                     0, NL80211_CMD_SET_STATION, 0);
3494
3495         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3496                     if_nametoindex(drv->ifname));
3497         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3498
3499         if (total_flags & WLAN_STA_AUTHORIZED)
3500                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3501
3502         if (total_flags & WLAN_STA_WMM)
3503                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3504
3505         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3506                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3507
3508         if (total_flags & WLAN_STA_MFP)
3509                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3510
3511         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3512                 goto nla_put_failure;
3513
3514         nlmsg_free(flags);
3515
3516         return send_and_recv_msgs(drv, msg, NULL, NULL);
3517  nla_put_failure:
3518         nlmsg_free(flags);
3519         return -ENOBUFS;
3520 }
3521
3522
3523 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3524                                     int cw_min, int cw_max, int burst_time)
3525 {
3526         struct wpa_driver_nl80211_data *drv = priv;
3527         struct nl_msg *msg;
3528         struct nlattr *txq, *params;
3529
3530         msg = nlmsg_alloc();
3531         if (!msg)
3532                 return -1;
3533
3534         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3535                     0, NL80211_CMD_SET_WIPHY, 0);
3536
3537         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3538
3539         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3540         if (!txq)
3541                 goto nla_put_failure;
3542
3543         /* We are only sending parameters for a single TXQ at a time */
3544         params = nla_nest_start(msg, 1);
3545         if (!params)
3546                 goto nla_put_failure;
3547
3548         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3549         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3550          * 32 usec, so need to convert the value here. */
3551         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3552         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3553         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3554         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3555
3556         nla_nest_end(msg, params);
3557
3558         nla_nest_end(msg, txq);
3559
3560         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3561                 return 0;
3562  nla_put_failure:
3563         return -1;
3564 }
3565
3566
3567 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3568 {
3569         struct wpa_driver_nl80211_data *drv = priv;
3570         int ifidx;
3571         struct i802_bss *bss;
3572
3573         bss = os_zalloc(sizeof(*bss));
3574         if (bss == NULL)
3575                 return -1;
3576         bss->ifindex = if_nametoindex(ifname);
3577
3578         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3579         if (ifidx < 0) {
3580                 os_free(bss);
3581                 return -1;
3582         }
3583         if (hostapd_set_iface_flags(priv, ifname, 1)) {
3584                 nl80211_remove_iface(priv, ifidx);
3585                 os_free(bss);
3586                 return -1;
3587         }
3588         bss->next = drv->bss.next;
3589         drv->bss.next = bss;
3590         return 0;
3591 }
3592
3593
3594 static int i802_bss_remove(void *priv, const char *ifname)
3595 {
3596         struct wpa_driver_nl80211_data *drv = priv;
3597         struct i802_bss *bss, *prev;
3598         int ifindex = if_nametoindex(ifname);
3599         nl80211_remove_iface(priv, ifindex);
3600         prev = &drv->bss;
3601         bss = drv->bss.next;
3602         while (bss) {
3603                 if (ifindex == bss->ifindex) {
3604                         prev->next = bss->next;
3605                         os_free(bss);
3606                         break;
3607                 }
3608                 prev = bss;
3609                 bss = bss->next;
3610         }
3611         return 0;
3612 }
3613
3614
3615 static int i802_set_beacon(const char *iface, void *priv,
3616                            const u8 *head, size_t head_len,
3617                            const u8 *tail, size_t tail_len, int dtim_period)
3618 {
3619         return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3620                                                    head, head_len,
3621                                                    tail, tail_len,
3622                                                    dtim_period);
3623 }
3624
3625
3626 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3627 {
3628         struct nl_msg *msg;
3629
3630         msg = nlmsg_alloc();
3631         if (!msg)
3632                 return -ENOMEM;
3633
3634         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3635                     0, NL80211_CMD_DEL_BEACON, 0);
3636         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3637
3638         return send_and_recv_msgs(drv, msg, NULL, NULL);
3639  nla_put_failure:
3640         return -ENOBUFS;
3641 }
3642
3643
3644 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3645 {
3646         struct wpa_driver_nl80211_data *drv = priv;
3647         struct nl_msg *msg;
3648
3649         msg = nlmsg_alloc();
3650         if (!msg)
3651                 return -ENOMEM;
3652
3653         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3654                     NL80211_CMD_SET_BSS, 0);
3655
3656         if (cts >= 0)
3657                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3658         if (preamble >= 0)
3659                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3660         if (slot >= 0)
3661                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3662
3663         /* TODO: multi-BSS support */
3664         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3665
3666         return send_and_recv_msgs(drv, msg, NULL, NULL);
3667  nla_put_failure:
3668         return -ENOBUFS;
3669 }
3670
3671
3672 static int i802_set_cts_protect(void *priv, int value)
3673 {
3674         return i802_set_bss(priv, value, -1, -1);
3675 }
3676
3677
3678 static int i802_set_preamble(void *priv, int value)
3679 {
3680         return i802_set_bss(priv, -1, value, -1);
3681 }
3682
3683
3684 static int i802_set_short_slot_time(void *priv, int value)
3685 {
3686         return i802_set_bss(priv, -1, -1, value);
3687 }
3688
3689
3690 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3691 {
3692         switch (type) {
3693         case HOSTAPD_IF_VLAN:
3694                 return NL80211_IFTYPE_AP_VLAN;
3695         case HOSTAPD_IF_WDS:
3696                 return NL80211_IFTYPE_WDS;
3697         }
3698         return -1;
3699 }
3700
3701
3702 static int i802_if_add(const char *iface, void *priv,
3703                        enum hostapd_driver_if_type type, char *ifname,
3704                        const u8 *addr)
3705 {
3706         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3707                 return -1;
3708         return 0;
3709 }
3710
3711
3712 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3713                           char *ifname, const u8 *addr)
3714 {
3715         /* unused at the moment */
3716         return -1;
3717 }
3718
3719
3720 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3721                           const char *ifname, const u8 *addr)
3722 {
3723         nl80211_remove_iface(priv, if_nametoindex(ifname));
3724         return 0;
3725 }
3726
3727
3728 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3729                              const char *ifname, int vlan_id)
3730 {
3731         struct wpa_driver_nl80211_data *drv = priv;
3732         struct nl_msg *msg;
3733
3734         msg = nlmsg_alloc();
3735         if (!msg)
3736                 return -ENOMEM;
3737
3738         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3739                     0, NL80211_CMD_SET_STATION, 0);
3740
3741         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3742                     if_nametoindex(drv->ifname));
3743         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3744         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3745                     if_nametoindex(ifname));
3746
3747         return send_and_recv_msgs(drv, msg, NULL, NULL);
3748  nla_put_failure:
3749         return -ENOBUFS;
3750 }
3751
3752
3753 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3754 {
3755         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3756         struct sockaddr_ll lladdr;
3757         unsigned char buf[3000];
3758         int len;
3759         socklen_t fromlen = sizeof(lladdr);
3760
3761         len = recvfrom(sock, buf, sizeof(buf), 0,
3762                        (struct sockaddr *)&lladdr, &fromlen);
3763         if (len < 0) {
3764                 perror("recv");
3765                 return;
3766         }
3767
3768         if (have_ifidx(drv, lladdr.sll_ifindex)) {
3769                 struct hostapd_data *hapd;
3770                 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3771                 if (!hapd)
3772                         return;
3773                 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3774         }
3775 }
3776
3777
3778 static int i802_get_inact_sec(void *priv, const u8 *addr)
3779 {
3780         struct hostap_sta_driver_data data;
3781         int ret;
3782
3783         data.inactive_msec = (unsigned long) -1;
3784         ret = i802_read_sta_data(priv, &data, addr);
3785         if (ret || data.inactive_msec == (unsigned long) -1)
3786                 return -1;
3787         return data.inactive_msec / 1000;
3788 }
3789
3790
3791 static int i802_sta_clear_stats(void *priv, const u8 *addr)
3792 {
3793 #if 0
3794         /* TODO */
3795 #endif
3796         return 0;
3797 }
3798
3799
3800 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
3801 {
3802         struct wpa_driver_nl80211_data *drv = priv;
3803         struct ieee80211_mgmt mgmt;
3804
3805         memset(&mgmt, 0, sizeof(mgmt));
3806         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3807                                           WLAN_FC_STYPE_DEAUTH);
3808         memcpy(mgmt.da, addr, ETH_ALEN);
3809         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
3810         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
3811         mgmt.u.deauth.reason_code = host_to_le16(reason);
3812         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3813                                             IEEE80211_HDRLEN +
3814                                             sizeof(mgmt.u.deauth));
3815 }
3816
3817
3818 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
3819 {
3820         struct wpa_driver_nl80211_data *drv = priv;
3821         struct ieee80211_mgmt mgmt;
3822
3823         memset(&mgmt, 0, sizeof(mgmt));
3824         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3825                                           WLAN_FC_STYPE_DISASSOC);
3826         memcpy(mgmt.da, addr, ETH_ALEN);
3827         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
3828         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
3829         mgmt.u.disassoc.reason_code = host_to_le16(reason);
3830         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3831                                             IEEE80211_HDRLEN +
3832                                             sizeof(mgmt.u.disassoc));
3833 }
3834
3835
3836 static void *i802_init(struct hostapd_data *hapd,
3837                        struct wpa_init_params *params)
3838 {
3839         struct wpa_driver_nl80211_data *drv;
3840         size_t i;
3841         struct ifreq ifr;
3842
3843         drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
3844         if (drv == NULL) {
3845                 printf("Could not allocate memory for i802 driver data\n");
3846                 return NULL;
3847         }
3848
3849         drv->hapd = hapd;
3850         drv->ctx = hapd;
3851         memcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
3852         drv->ifindex = if_nametoindex(drv->ifname);
3853         drv->bss.ifindex = drv->ifindex;
3854
3855         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
3856         drv->if_indices = drv->default_if_indices;
3857         for (i = 0; i < params->num_bridge; i++) {
3858                 if (params->bridge[i])
3859                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
3860         }
3861
3862         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
3863         if (drv->ioctl_sock < 0) {
3864                 perror("socket[PF_INET,SOCK_DGRAM]");
3865                 goto failed;
3866         }
3867
3868         /* start listening for EAPOL on the default AP interface */
3869         add_ifidx(drv, drv->ifindex);
3870
3871         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
3872                 goto failed;
3873
3874         if (params->bssid) {
3875                 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
3876                 os_memcpy(ifr.ifr_hwaddr.sa_data, params->bssid, ETH_ALEN);
3877                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
3878
3879                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
3880                         perror("ioctl(SIOCSIFHWADDR)");
3881                         goto failed;
3882                 }
3883         }
3884
3885         if (wpa_driver_nl80211_init_nl(drv, drv->hapd))
3886                 goto failed;
3887
3888         /* Initialise a monitor interface */
3889         if (nl80211_create_monitor_interface(drv))
3890                 goto failed;
3891
3892         if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
3893                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
3894                            "into AP mode", drv->ifname);
3895                 goto fail1;
3896         }
3897
3898         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3899                 goto fail1;
3900
3901         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
3902         if (drv->eapol_sock < 0) {
3903                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
3904                 goto fail1;
3905         }
3906
3907         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
3908         {
3909                 printf("Could not register read socket for eapol\n");
3910                 goto failed;
3911         }
3912
3913         os_memset(&ifr, 0, sizeof(ifr));
3914         os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
3915         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
3916                 perror("ioctl(SIOCGIFHWADDR)");
3917                 goto fail1;
3918         }
3919
3920         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
3921                 printf("Invalid HW-addr family 0x%04x\n",
3922                        ifr.ifr_hwaddr.sa_family);
3923                 goto fail1;
3924         }
3925         os_memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
3926
3927         return drv;
3928
3929 fail1:
3930         nl80211_remove_iface(drv, drv->monitor_ifidx);
3931 failed:
3932         free(drv);
3933         return NULL;
3934 }
3935
3936
3937 static void i802_deinit(void *priv)
3938 {
3939         struct wpa_driver_nl80211_data *drv = priv;
3940         struct i802_bss *bss, *prev;
3941
3942         if (drv->last_freq_ht) {
3943                 /* Clear HT flags from the driver */
3944                 struct hostapd_freq_params freq;
3945                 os_memset(&freq, 0, sizeof(freq));
3946                 freq.freq = drv->last_freq;
3947                 i802_set_freq(priv, &freq);
3948         }
3949
3950         i802_del_beacon(drv);
3951
3952         /* remove monitor interface */
3953         nl80211_remove_iface(drv, drv->monitor_ifidx);
3954
3955         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
3956
3957         if (drv->monitor_sock >= 0) {
3958                 eloop_unregister_read_sock(drv->monitor_sock);
3959                 close(drv->monitor_sock);
3960         }
3961         if (drv->ioctl_sock >= 0)
3962                 close(drv->ioctl_sock);
3963         if (drv->eapol_sock >= 0) {
3964                 eloop_unregister_read_sock(drv->eapol_sock);
3965                 close(drv->eapol_sock);
3966         }
3967
3968         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
3969         genl_family_put(drv->nl80211);
3970         nl_cache_free(drv->nl_cache);
3971         nl_handle_destroy(drv->nl_handle);
3972         nl_cb_put(drv->nl_cb);
3973
3974         if (drv->if_indices != drv->default_if_indices)
3975                 free(drv->if_indices);
3976
3977         bss = drv->bss.next;
3978         while (bss) {
3979                 prev = bss;
3980                 bss = bss->next;
3981                 os_free(bss);
3982         }
3983
3984         free(drv);
3985 }
3986
3987 #endif /* HOSTAPD */
3988
3989
3990 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
3991         .name = "nl80211",
3992         .desc = "Linux nl80211/cfg80211",
3993         .get_bssid = wpa_driver_nl80211_get_bssid,
3994         .get_ssid = wpa_driver_nl80211_get_ssid,
3995         .set_key = wpa_driver_nl80211_set_key,
3996         .scan2 = wpa_driver_nl80211_scan,
3997         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
3998         .deauthenticate = wpa_driver_nl80211_deauthenticate,
3999         .disassociate = wpa_driver_nl80211_disassociate,
4000         .authenticate = wpa_driver_nl80211_authenticate,
4001         .associate = wpa_driver_nl80211_associate,
4002         .init = wpa_driver_nl80211_init,
4003         .deinit = wpa_driver_nl80211_deinit,
4004         .get_capa = wpa_driver_nl80211_get_capa,
4005         .set_operstate = wpa_driver_nl80211_set_operstate,
4006         .set_country = wpa_driver_nl80211_set_country,
4007         .set_mode = wpa_driver_nl80211_set_mode,
4008 #ifdef CONFIG_AP
4009         .set_beacon = wpa_driver_nl80211_set_beacon,
4010 #endif /* CONFIG_AP */
4011 #if defined(CONFIG_AP) || defined(HOSTAPD)
4012         .send_mlme = wpa_driver_nl80211_send_mlme,
4013         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4014         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4015 #endif /* CONFIG_AP || HOSTAPD */
4016 #ifdef HOSTAPD
4017         .hapd_init = i802_init,
4018         .hapd_deinit = i802_deinit,
4019         .hapd_set_key = i802_set_key,
4020         .get_seqnum = i802_get_seqnum,
4021         .flush = i802_flush,
4022         .read_sta_data = i802_read_sta_data,
4023         .hapd_send_eapol = i802_send_eapol,
4024         .sta_set_flags = i802_sta_set_flags,
4025         .sta_deauth = i802_sta_deauth,
4026         .sta_disassoc = i802_sta_disassoc,
4027         .sta_remove = i802_sta_remove,
4028         .sta_add = i802_sta_add,
4029         .get_inact_sec = i802_get_inact_sec,
4030         .sta_clear_stats = i802_sta_clear_stats,
4031         .set_freq = i802_set_freq,
4032         .set_rts = i802_set_rts,
4033         .set_frag = i802_set_frag,
4034         .set_retry = i802_set_retry,
4035         .set_rate_sets = i802_set_rate_sets,
4036         .hapd_set_beacon = i802_set_beacon,
4037         .set_cts_protect = i802_set_cts_protect,
4038         .set_preamble = i802_set_preamble,
4039         .set_short_slot_time = i802_set_short_slot_time,
4040         .set_tx_queue_params = i802_set_tx_queue_params,
4041         .bss_add = i802_bss_add,
4042         .bss_remove = i802_bss_remove,
4043         .if_add = i802_if_add,
4044         .if_update = i802_if_update,
4045         .if_remove = i802_if_remove,
4046         .set_sta_vlan = i802_set_sta_vlan,
4047 #endif /* HOSTAPD */
4048 };