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

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if_arp.h>
  22 #include <net/if.h>
  23 #include <netlink/genl/genl.h>
  24 #include <netlink/genl/family.h>
  25 #include <netlink/genl/ctrl.h>
  26 #include "nl80211_copy.h"
  27 #ifndef NO_WEXT
  28 #include "wireless_copy.h"
  29 #endif /* NO_WEXT */
  30
  31 #include "common.h"
  32 #include "driver.h"
  33 #include "eloop.h"
  34 #include "ieee802_11_defs.h"
  35
  36 #if defined(CONFIG_AP) || defined(HOSTAPD)
  37 #include <netpacket/packet.h>
  38 #include <linux/filter.h>
  39 #include "radiotap.h"
  40 #include "radiotap_iter.h"
  41 #endif /* CONFIG_AP || HOSTAPD */
  42
  43 #ifdef CONFIG_AP
  44
  45 #include "../hostapd/hostapd_defs.h"
  46
  47 #ifndef ETH_P_ALL
  48 #define ETH_P_ALL 0x0003
  49 #endif
  50
  51 #endif /* CONFIG_AP */
  52
  53 #ifdef HOSTAPD
  54 #include "../../hostapd/hostapd.h"
  55 #include "../../hostapd/sta_flags.h"
  56 #include "ieee802_11_common.h"
  57
  58 #ifdef CONFIG_LIBNL20
  59 /* libnl 2.0 compatibility code */
  60 #define nl_handle_alloc_cb nl_socket_alloc_cb
  61 #define nl_handle_destroy nl_socket_free
  62 #endif /* CONFIG_LIBNL20 */
  63
  64 #endif /* HOSTAPD */
  65
  66
  67 #ifndef IFF_LOWER_UP
  68 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  69 #endif
  70 #ifndef IFF_DORMANT
  71 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  72 #endif
  73
  74 #ifndef IF_OPER_DORMANT
  75 #define IF_OPER_DORMANT 5
  76 #endif
  77 #ifndef IF_OPER_UP
  78 #define IF_OPER_UP 6
  79 #endif
  80
  81 enum ieee80211_msg_type {
  82         ieee80211_msg_normal = 0,
  83         ieee80211_msg_tx_callback_ack = 1,
  84         ieee80211_msg_tx_callback_fail = 2,
  85 };
  86
  87 struct i802_bss {
  88         struct i802_bss *next;
  89         int ifindex;
  90         unsigned int beacon_set:1;
  91 };
  92
  93 struct wpa_driver_nl80211_data {
  94         void *ctx;
  95         int link_event_sock;
  96         int ioctl_sock; /* socket for ioctl() use */
  97         char ifname[IFNAMSIZ + 1];
  98         int ifindex;
  99         int if_removed;
 100         struct wpa_driver_capa capa;
 101         int has_capability;
 102
 103         int operstate;
 104
 105         int scan_complete_events;
 106
 107         struct nl_handle *nl_handle;
 108         struct nl_cache *nl_cache;
 109         struct nl_cb *nl_cb;
 110         struct genl_family *nl80211;
 111
 112         u8 bssid[ETH_ALEN];
 113         int associated;
 114         u8 ssid[32];
 115         size_t ssid_len;
 116         int nlmode;
 117         int ap_scan_as_station;
 118
 119         int beacon_int;
 120         int monitor_sock;
 121         int monitor_ifidx;
 122
 123 #ifdef CONFIG_AP
 124         unsigned int beacon_set:1;
 125 #endif /* CONFIG_AP */
 126
 127 #ifdef HOSTAPD
 128         struct hostapd_data *hapd;
 129
 130         int eapol_sock; /* socket for EAPOL frames */
 131
 132         int default_if_indices[16];
 133         int *if_indices;
 134         int num_if_indices;
 135
 136         struct i802_bss bss;
 137
 138         int last_freq;
 139         int last_freq_ht;
 140 #endif /* HOSTAPD */
 141 };
 142
 143
 144 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 145                                             void *timeout_ctx);
 146 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 147 static int
 148 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 149
 150 #ifdef CONFIG_AP
 151 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 152                                  int ifidx);
 153 #endif /* CONFIG_AP */
 154
 155 #ifdef HOSTAPD
 156 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 157 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 158 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 159                                  int ifindex);
 160 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 161                                  int ifidx);
 162 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 163 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv);
 164 #endif /* HOSTAPD */
 165
 166
 167 /* nl80211 code */
 168 static int ack_handler(struct nl_msg *msg, void *arg)
 169 {
 170         int *err = arg;
 171         *err = 0;
 172         return NL_STOP;
 173 }
 174
 175 static int finish_handler(struct nl_msg *msg, void *arg)
 176 {
 177         int *ret = arg;
 178         *ret = 0;
 179         return NL_SKIP;
 180 }
 181
 182 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 183                          void *arg)
 184 {
 185         int *ret = arg;
 186         *ret = err->error;
 187         return NL_SKIP;
 188 }
 189
 190
 191 static int no_seq_check(struct nl_msg *msg, void *arg)
 192 {
 193         return NL_OK;
 194 }
 195
 196
 197 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 198                               struct nl_msg *msg,
 199                               int (*valid_handler)(struct nl_msg *, void *),
 200                               void *valid_data)
 201 {
 202         struct nl_cb *cb;
 203         int err = -ENOMEM;
 204
 205         cb = nl_cb_clone(drv->nl_cb);
 206         if (!cb)
 207                 goto out;
 208
 209         err = nl_send_auto_complete(drv->nl_handle, msg);
 210         if (err < 0)
 211                 goto out;
 212
 213         err = 1;
 214
 215         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 216         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 217         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 218
 219         if (valid_handler)
 220                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 221                           valid_handler, valid_data);
 222
 223         while (err > 0)
 224                 nl_recvmsgs(drv->nl_handle, cb);
 225  out:
 226         nl_cb_put(cb);
 227         nlmsg_free(msg);
 228         return err;
 229 }
 230
 231
 232 struct family_data {
 233         const char *group;
 234         int id;
 235 };
 236
 237
 238 static int family_handler(struct nl_msg *msg, void *arg)
 239 {
 240         struct family_data *res = arg;
 241         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 242         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 243         struct nlattr *mcgrp;
 244         int i;
 245
 246         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 247                   genlmsg_attrlen(gnlh, 0), NULL);
 248         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 249                 return NL_SKIP;
 250
 251         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 252                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 253                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 254                           nla_len(mcgrp), NULL);
 255                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 256                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 257                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 258                                res->group,
 259                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 260                         continue;
 261                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 262                 break;
 263         };
 264
 265         return NL_SKIP;
 266 }
 267
 268
 269 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 270                                const char *family, const char *group)
 271 {
 272         struct nl_msg *msg;
 273         int ret = -1;
 274         struct family_data res = { group, -ENOENT };
 275
 276         msg = nlmsg_alloc();
 277         if (!msg)
 278                 return -ENOMEM;
 279         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 280                     0, 0, CTRL_CMD_GETFAMILY, 0);
 281         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 282
 283         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 284         msg = NULL;
 285         if (ret == 0)
 286                 ret = res.id;
 287
 288 nla_put_failure:
 289         nlmsg_free(msg);
 290         return ret;
 291 }
 292
 293
 294 #ifdef HOSTAPD
 295 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 296                         const char *ifname, u8 *addr)
 297 {
 298         struct ifreq ifr;
 299
 300         os_memset(&ifr, 0, sizeof(ifr));
 301         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 302         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 303                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 304                            ifname, errno, strerror(errno));
 305                 return -1;
 306         }
 307
 308         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 309                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 310                            ifname, ifr.ifr_hwaddr.sa_family);
 311                 return -1;
 312         }
 313         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 314
 315         return 0;
 316 }
 317
 318
 319 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 320                         const char *ifname, const u8 *addr)
 321 {
 322         struct ifreq ifr;
 323
 324         os_memset(&ifr, 0, sizeof(ifr));
 325         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 326         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 327         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 328
 329         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 330                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 331                            ifname, errno, strerror(errno));
 332                 return -1;
 333         }
 334
 335         return 0;
 336 }
 337 #endif /* HOSTAPD */
 338
 339
 340 static int wpa_driver_nl80211_send_oper_ifla(
 341         struct wpa_driver_nl80211_data *drv,
 342         int linkmode, int operstate)
 343 {
 344         struct {
 345                 struct nlmsghdr hdr;
 346                 struct ifinfomsg ifinfo;
 347                 char opts[16];
 348         } req;
 349         struct rtattr *rta;
 350         static int nl_seq;
 351         ssize_t ret;
 352
 353         os_memset(&req, 0, sizeof(req));
 354
 355         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 356         req.hdr.nlmsg_type = RTM_SETLINK;
 357         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 358         req.hdr.nlmsg_seq = ++nl_seq;
 359         req.hdr.nlmsg_pid = 0;
 360
 361         req.ifinfo.ifi_family = AF_UNSPEC;
 362         req.ifinfo.ifi_type = 0;
 363         req.ifinfo.ifi_index = drv->ifindex;
 364         req.ifinfo.ifi_flags = 0;
 365         req.ifinfo.ifi_change = 0;
 366
 367         if (linkmode != -1) {
 368                 rta = (struct rtattr *)
 369                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 370                 rta->rta_type = IFLA_LINKMODE;
 371                 rta->rta_len = RTA_LENGTH(sizeof(char));
 372                 *((char *) RTA_DATA(rta)) = linkmode;
 373                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 374                         RTA_LENGTH(sizeof(char));
 375         }
 376         if (operstate != -1) {
 377                 rta = (struct rtattr *)
 378                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 379                 rta->rta_type = IFLA_OPERSTATE;
 380                 rta->rta_len = RTA_LENGTH(sizeof(char));
 381                 *((char *) RTA_DATA(rta)) = operstate;
 382                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 383                         RTA_LENGTH(sizeof(char));
 384         }
 385
 386         wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
 387                    linkmode, operstate);
 388
 389         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 390         if (ret < 0) {
 391                 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
 392                            " %s (assume operstate is not supported)",
 393                            strerror(errno));
 394         }
 395
 396         return ret < 0 ? -1 : 0;
 397 }
 398
 399
 400 #ifndef NO_WEXT
 401 static int wpa_driver_nl80211_set_auth_param(
 402         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 403 {
 404         struct iwreq iwr;
 405         int ret = 0;
 406
 407         os_memset(&iwr, 0, sizeof(iwr));
 408         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 409         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 410         iwr.u.param.value = value;
 411
 412         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 413                 if (errno != EOPNOTSUPP) {
 414                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 415                                    "value 0x%x) failed: %s)",
 416                                    idx, value, strerror(errno));
 417                 }
 418                 ret = errno == EOPNOTSUPP ? -2 : -1;
 419         }
 420
 421         return ret;
 422 }
 423 #endif /* NO_WEXT */
 424
 425
 426 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 427 {
 428         struct wpa_driver_nl80211_data *drv = priv;
 429         if (!drv->associated)
 430                 return -1;
 431         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 432         return 0;
 433 }
 434
 435
 436 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 437 {
 438         struct wpa_driver_nl80211_data *drv = priv;
 439         if (!drv->associated)
 440                 return -1;
 441         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 442         return drv->ssid_len;
 443 }
 444
 445
 446 #ifndef HOSTAPD
 447 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 448                                           void *ctx, char *buf, size_t len,
 449                                           int del)
 450 {
 451         union wpa_event_data event;
 452
 453         os_memset(&event, 0, sizeof(event));
 454         if (len > sizeof(event.interface_status.ifname))
 455                 len = sizeof(event.interface_status.ifname) - 1;
 456         os_memcpy(event.interface_status.ifname, buf, len);
 457         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 458                 EVENT_INTERFACE_ADDED;
 459
 460         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 461                    del ? "DEL" : "NEW",
 462                    event.interface_status.ifname,
 463                    del ? "removed" : "added");
 464
 465         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 466                 if (del)
 467                         drv->if_removed = 1;
 468                 else
 469                         drv->if_removed = 0;
 470         }
 471
 472         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 473 }
 474
 475
 476 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 477                                          struct nlmsghdr *h)
 478 {
 479         struct ifinfomsg *ifi;
 480         int attrlen, _nlmsg_len, rta_len;
 481         struct rtattr *attr;
 482
 483         ifi = NLMSG_DATA(h);
 484
 485         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 486
 487         attrlen = h->nlmsg_len - _nlmsg_len;
 488         if (attrlen < 0)
 489                 return 0;
 490
 491         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 492
 493         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 494         while (RTA_OK(attr, attrlen)) {
 495                 if (attr->rta_type == IFLA_IFNAME) {
 496                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 497                             == 0)
 498                                 return 1;
 499                         else
 500                                 break;
 501                 }
 502                 attr = RTA_NEXT(attr, attrlen);
 503         }
 504
 505         return 0;
 506 }
 507
 508
 509 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 510                                           int ifindex, struct nlmsghdr *h)
 511 {
 512         if (drv->ifindex == ifindex)
 513                 return 1;
 514
 515         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 516                 drv->ifindex = if_nametoindex(drv->ifname);
 517                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 518                            "interface");
 519                 wpa_driver_nl80211_finish_drv_init(drv);
 520                 return 1;
 521         }
 522
 523         return 0;
 524 }
 525
 526
 527 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 528                                               void *ctx, struct nlmsghdr *h,
 529                                               size_t len)
 530 {
 531         struct ifinfomsg *ifi;
 532         int attrlen, _nlmsg_len, rta_len;
 533         struct rtattr * attr;
 534
 535         if (len < sizeof(*ifi))
 536                 return;
 537
 538         ifi = NLMSG_DATA(h);
 539
 540         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 541                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 542                            ifi->ifi_index);
 543                 return;
 544         }
 545
 546         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 547                    "(%s%s%s%s)",
 548                    drv->operstate, ifi->ifi_flags,
 549                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 550                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 551                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 552                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 553         /*
 554          * Some drivers send the association event before the operup event--in
 555          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 556          * fails. This will hit us when wpa_supplicant does not need to do
 557          * IEEE 802.1X authentication
 558          */
 559         if (drv->operstate == 1 &&
 560             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 561             !(ifi->ifi_flags & IFF_RUNNING))
 562                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 563
 564         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 565
 566         attrlen = h->nlmsg_len - _nlmsg_len;
 567         if (attrlen < 0)
 568                 return;
 569
 570         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 571
 572         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 573         while (RTA_OK(attr, attrlen)) {
 574                 if (attr->rta_type == IFLA_IFNAME) {
 575                         wpa_driver_nl80211_event_link(
 576                                 drv, ctx,
 577                                 ((char *) attr) + rta_len,
 578                                 attr->rta_len - rta_len, 0);
 579                 }
 580                 attr = RTA_NEXT(attr, attrlen);
 581         }
 582 }
 583
 584
 585 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 586                                               void *ctx, struct nlmsghdr *h,
 587                                               size_t len)
 588 {
 589         struct ifinfomsg *ifi;
 590         int attrlen, _nlmsg_len, rta_len;
 591         struct rtattr * attr;
 592
 593         if (len < sizeof(*ifi))
 594                 return;
 595
 596         ifi = NLMSG_DATA(h);
 597
 598         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 599
 600         attrlen = h->nlmsg_len - _nlmsg_len;
 601         if (attrlen < 0)
 602                 return;
 603
 604         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 605
 606         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 607         while (RTA_OK(attr, attrlen)) {
 608                 if (attr->rta_type == IFLA_IFNAME) {
 609                         wpa_driver_nl80211_event_link(
 610                                 drv, ctx,
 611                                 ((char *) attr) + rta_len,
 612                                 attr->rta_len - rta_len, 1);
 613                 }
 614                 attr = RTA_NEXT(attr, attrlen);
 615         }
 616 }
 617
 618
 619 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 620                                                   void *sock_ctx)
 621 {
 622         char buf[8192];
 623         int left;
 624         struct sockaddr_nl from;
 625         socklen_t fromlen;
 626         struct nlmsghdr *h;
 627         int max_events = 10;
 628
 629 try_again:
 630         fromlen = sizeof(from);
 631         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 632                         (struct sockaddr *) &from, &fromlen);
 633         if (left < 0) {
 634                 if (errno != EINTR && errno != EAGAIN)
 635                         perror("recvfrom(netlink)");
 636                 return;
 637         }
 638
 639         h = (struct nlmsghdr *) buf;
 640         while (left >= (int) sizeof(*h)) {
 641                 int len, plen;
 642
 643                 len = h->nlmsg_len;
 644                 plen = len - sizeof(*h);
 645                 if (len > left || plen < 0) {
 646                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 647                                    "len=%d left=%d plen=%d",
 648                                    len, left, plen);
 649                         break;
 650                 }
 651
 652                 switch (h->nlmsg_type) {
 653                 case RTM_NEWLINK:
 654                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 655                                                           h, plen);
 656                         break;
 657                 case RTM_DELLINK:
 658                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 659                                                           h, plen);
 660                         break;
 661                 }
 662
 663                 len = NLMSG_ALIGN(len);
 664                 left -= len;
 665                 h = (struct nlmsghdr *) ((char *) h + len);
 666         }
 667
 668         if (left > 0) {
 669                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 670                            "message", left);
 671         }
 672
 673         if (--max_events > 0) {
 674                 /*
 675                  * Try to receive all events in one eloop call in order to
 676                  * limit race condition on cases where AssocInfo event, Assoc
 677                  * event, and EAPOL frames are received more or less at the
 678                  * same time. We want to process the event messages first
 679                  * before starting EAPOL processing.
 680                  */
 681                 goto try_again;
 682         }
 683 }
 684
 685
 686 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 687                             const u8 *frame, size_t len)
 688 {
 689         const struct ieee80211_mgmt *mgmt;
 690         union wpa_event_data event;
 691
 692         mgmt = (const struct ieee80211_mgmt *) frame;
 693         if (len < 24 + sizeof(mgmt->u.auth)) {
 694                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 695                            "frame");
 696                 return;
 697         }
 698
 699         os_memset(&event, 0, sizeof(event));
 700         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 701         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 702         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 703         if (len > 24 + sizeof(mgmt->u.auth)) {
 704                 event.auth.ies = mgmt->u.auth.variable;
 705                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 706         }
 707
 708         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 709 }
 710
 711
 712 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 713                             const u8 *frame, size_t len)
 714 {
 715         const struct ieee80211_mgmt *mgmt;
 716         union wpa_event_data event;
 717         u16 status;
 718
 719         mgmt = (const struct ieee80211_mgmt *) frame;
 720         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 721                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 722                            "frame");
 723                 return;
 724         }
 725
 726         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 727         if (status != WLAN_STATUS_SUCCESS) {
 728                 os_memset(&event, 0, sizeof(event));
 729                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 730                         event.assoc_reject.resp_ies =
 731                                 (u8 *) mgmt->u.assoc_resp.variable;
 732                         event.assoc_reject.resp_ies_len =
 733                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 734                 }
 735                 event.assoc_reject.status_code = status;
 736
 737                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 738                 return;
 739         }
 740
 741         drv->associated = 1;
 742         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 743
 744         os_memset(&event, 0, sizeof(event));
 745         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 746                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 747                 event.assoc_info.resp_ies_len =
 748                         len - 24 - sizeof(mgmt->u.assoc_resp);
 749         }
 750
 751         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 752 }
 753
 754
 755 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 756                        enum nl80211_commands cmd, struct nlattr *frame)
 757 {
 758         if (frame == NULL) {
 759                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 760                            "data", cmd);
 761                 return;
 762         }
 763
 764         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 765         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 766                     nla_data(frame), nla_len(frame));
 767
 768         switch (cmd) {
 769         case NL80211_CMD_AUTHENTICATE:
 770                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 771                 break;
 772         case NL80211_CMD_ASSOCIATE:
 773                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 774                 break;
 775         case NL80211_CMD_DEAUTHENTICATE:
 776                 drv->associated = 0;
 777                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 778                 break;
 779         case NL80211_CMD_DISASSOCIATE:
 780                 drv->associated = 0;
 781                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 782                 break;
 783         default:
 784                 break;
 785         }
 786 }
 787
 788 #endif /* HOSTAPD */
 789
 790
 791 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 792                                            struct nlattr *tb[])
 793 {
 794         union wpa_event_data data;
 795
 796         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 797         os_memset(&data, 0, sizeof(data));
 798         if (tb[NL80211_ATTR_MAC]) {
 799                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 800                             nla_data(tb[NL80211_ATTR_MAC]),
 801                             nla_len(tb[NL80211_ATTR_MAC]));
 802                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 803         }
 804         if (tb[NL80211_ATTR_KEY_SEQ]) {
 805                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 806                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 807                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 808         }
 809         if (tb[NL80211_ATTR_KEY_TYPE]) {
 810                 enum nl80211_key_type key_type =
 811                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 812                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 813                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 814                         data.michael_mic_failure.unicast = 1;
 815         } else
 816                 data.michael_mic_failure.unicast = 1;
 817
 818         if (tb[NL80211_ATTR_KEY_IDX]) {
 819                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 820                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 821         }
 822
 823         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 824 }
 825
 826
 827 static int process_event(struct nl_msg *msg, void *arg)
 828 {
 829         struct wpa_driver_nl80211_data *drv = arg;
 830         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 831         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 832
 833         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 834                   genlmsg_attrlen(gnlh, 0), NULL);
 835
 836         if (tb[NL80211_ATTR_IFINDEX]) {
 837                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 838                 if (ifindex != drv->ifindex) {
 839                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 840                                    " for foreign interface (ifindex %d)",
 841                                    gnlh->cmd, ifindex);
 842                         return NL_SKIP;
 843                 }
 844         }
 845
 846         if (drv->ap_scan_as_station &&
 847             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 848              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 849                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 850                 drv->ap_scan_as_station = 0;
 851         }
 852
 853         switch (gnlh->cmd) {
 854         case NL80211_CMD_NEW_SCAN_RESULTS:
 855                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 856                 drv->scan_complete_events = 1;
 857                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 858                                      drv->ctx);
 859                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 860                 break;
 861         case NL80211_CMD_SCAN_ABORTED:
 862                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 863                 /*
 864                  * Need to indicate that scan results are available in order
 865                  * not to make wpa_supplicant stop its scanning.
 866                  */
 867                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 868                                      drv->ctx);
 869                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 870                 break;
 871 #ifndef HOSTAPD
 872         case NL80211_CMD_AUTHENTICATE:
 873         case NL80211_CMD_ASSOCIATE:
 874         case NL80211_CMD_DEAUTHENTICATE:
 875         case NL80211_CMD_DISASSOCIATE:
 876                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
 877                 break;
 878 #endif /* HOSTAPD */
 879         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 880                 mlme_event_michael_mic_failure(drv, tb);
 881                 break;
 882         default:
 883                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 884                            "(cmd=%d)", gnlh->cmd);
 885                 break;
 886         }
 887
 888         return NL_SKIP;
 889 }
 890
 891
 892 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 893                                              void *sock_ctx)
 894 {
 895         struct nl_cb *cb;
 896         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 897
 898         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 899
 900         cb = nl_cb_clone(drv->nl_cb);
 901         if (!cb)
 902                 return;
 903         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 904         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 905         nl_recvmsgs(drv->nl_handle, cb);
 906         nl_cb_put(cb);
 907 }
 908
 909
 910 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 911                                    const char *ifname, int dev_up)
 912 {
 913         struct ifreq ifr;
 914
 915         if (drv->ioctl_sock < 0)
 916                 return -1;
 917
 918         os_memset(&ifr, 0, sizeof(ifr));
 919         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 920
 921         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 922                 perror("ioctl[SIOCGIFFLAGS]");
 923                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 924                            ifname);
 925                 return -1;
 926         }
 927
 928         if (dev_up) {
 929                 if (ifr.ifr_flags & IFF_UP)
 930                         return 0;
 931                 ifr.ifr_flags |= IFF_UP;
 932         } else {
 933                 if (!(ifr.ifr_flags & IFF_UP))
 934                         return 0;
 935                 ifr.ifr_flags &= ~IFF_UP;
 936         }
 937
 938         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 939                 perror("ioctl[SIOCSIFFLAGS]");
 940                 return -1;
 941         }
 942
 943         return 0;
 944 }
 945
 946
 947 /**
 948  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 949  * @priv: driver_nl80211 private data
 950  * @alpha2_arg: country to which to switch to
 951  * Returns: 0 on success, -1 on failure
 952  *
 953  * This asks nl80211 to set the regulatory domain for given
 954  * country ISO / IEC alpha2.
 955  */
 956 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 957 {
 958         struct wpa_driver_nl80211_data *drv = priv;
 959         char alpha2[3];
 960         struct nl_msg *msg;
 961
 962         msg = nlmsg_alloc();
 963         if (!msg)
 964                 return -ENOMEM;
 965
 966         alpha2[0] = alpha2_arg[0];
 967         alpha2[1] = alpha2_arg[1];
 968         alpha2[2] = '\0';
 969
 970         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 971                     0, NL80211_CMD_REQ_SET_REG, 0);
 972
 973         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 974         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 975                 return -EINVAL;
 976         return 0;
 977 nla_put_failure:
 978         return -EINVAL;
 979 }
 980
 981
 982 #ifndef HOSTAPD
 983 struct wiphy_info_data {
 984         int max_scan_ssids;
 985         int ap_supported;
 986 };
 987
 988
 989 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 990 {
 991         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 992         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 993         struct wiphy_info_data *info = arg;
 994
 995         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 996                   genlmsg_attrlen(gnlh, 0), NULL);
 997
 998         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 999                 info->max_scan_ssids =
1000                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1001
1002         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1003                 struct nlattr *nl_mode;
1004                 int i;
1005                 nla_for_each_nested(nl_mode,
1006                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1007                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1008                                 info->ap_supported = 1;
1009                                 break;
1010                         }
1011                 }
1012         }
1013
1014         return NL_SKIP;
1015 }
1016
1017
1018 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1019                                        struct wiphy_info_data *info)
1020 {
1021         struct nl_msg *msg;
1022
1023         os_memset(info, 0, sizeof(*info));
1024         msg = nlmsg_alloc();
1025         if (!msg)
1026                 return -1;
1027
1028         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1029                     0, NL80211_CMD_GET_WIPHY, 0);
1030
1031         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1032
1033         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1034                 return 0;
1035         msg = NULL;
1036 nla_put_failure:
1037         nlmsg_free(msg);
1038         return -1;
1039 }
1040
1041
1042 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1043 {
1044         struct wiphy_info_data info;
1045         if (wpa_driver_nl80211_get_info(drv, &info))
1046                 return;
1047         drv->has_capability = 1;
1048         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1049         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1050                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1051                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1052                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1053         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1054                 WPA_DRIVER_CAPA_ENC_WEP104 |
1055                 WPA_DRIVER_CAPA_ENC_TKIP |
1056                 WPA_DRIVER_CAPA_ENC_CCMP;
1057
1058         drv->capa.max_scan_ssids = info.max_scan_ssids;
1059         if (info.ap_supported)
1060                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1061 }
1062 #endif /* HOSTAPD */
1063
1064
1065 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1066                                       void *ctx)
1067 {
1068         int ret;
1069
1070         /* Initialize generic netlink and nl80211 */
1071
1072         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1073         if (drv->nl_cb == NULL) {
1074                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1075                            "callbacks");
1076                 goto err1;
1077         }
1078
1079         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1080         if (drv->nl_handle == NULL) {
1081                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1082                            "callbacks");
1083                 goto err2;
1084         }
1085
1086         if (genl_connect(drv->nl_handle)) {
1087                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1088                            "netlink");
1089                 goto err3;
1090         }
1091
1092 #ifdef CONFIG_LIBNL20
1093         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1094                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1095                            "netlink cache");
1096                 goto err3;
1097         }
1098 #else /* CONFIG_LIBNL20 */
1099         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1100         if (drv->nl_cache == NULL) {
1101                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1102                            "netlink cache");
1103                 goto err3;
1104         }
1105 #endif /* CONFIG_LIBNL20 */
1106
1107
1108         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1109         if (drv->nl80211 == NULL) {
1110                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1111                            "found");
1112                 goto err4;
1113         }
1114
1115         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1116         if (ret >= 0)
1117                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1118         if (ret < 0) {
1119                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1120                            "membership for scan events: %d (%s)",
1121                            ret, strerror(-ret));
1122                 goto err4;
1123         }
1124
1125         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1126         if (ret >= 0)
1127                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1128         if (ret < 0) {
1129                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1130                            "membership for mlme events: %d (%s)",
1131                            ret, strerror(-ret));
1132                 goto err4;
1133         }
1134
1135         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1136                                  wpa_driver_nl80211_event_receive, drv, ctx);
1137
1138         return 0;
1139
1140 err4:
1141         nl_cache_free(drv->nl_cache);
1142 err3:
1143         nl_handle_destroy(drv->nl_handle);
1144 err2:
1145         nl_cb_put(drv->nl_cb);
1146 err1:
1147         return -1;
1148 }
1149
1150
1151 static int wpa_driver_nl80211_init_link_events(
1152         struct wpa_driver_nl80211_data *drv)
1153 {
1154 #ifdef HOSTAPD
1155         return 0;
1156 #else /* HOSTAPD */
1157         int s;
1158         struct sockaddr_nl local;
1159
1160         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1161         if (s < 0) {
1162                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1163                 return -1;
1164         }
1165
1166         os_memset(&local, 0, sizeof(local));
1167         local.nl_family = AF_NETLINK;
1168         local.nl_groups = RTMGRP_LINK;
1169         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1170                 perror("bind(netlink)");
1171                 close(s);
1172                 return -1;
1173         }
1174
1175         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1176                                  drv->ctx);
1177         drv->link_event_sock = s;
1178
1179         return 0;
1180 #endif /* HOSTAPD */
1181 }
1182
1183
1184 /**
1185  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1186  * @ctx: context to be used when calling wpa_supplicant functions,
1187  * e.g., wpa_supplicant_event()
1188  * @ifname: interface name, e.g., wlan0
1189  * Returns: Pointer to private data, %NULL on failure
1190  */
1191 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1192 {
1193         struct wpa_driver_nl80211_data *drv;
1194
1195         drv = os_zalloc(sizeof(*drv));
1196         if (drv == NULL)
1197                 return NULL;
1198         drv->ctx = ctx;
1199         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1200         drv->monitor_ifidx = -1;
1201         drv->monitor_sock = -1;
1202         drv->link_event_sock = -1;
1203         drv->ioctl_sock = -1;
1204
1205         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1206                 os_free(drv);
1207                 return NULL;
1208         }
1209
1210         drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1211
1212         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1213         if (drv->ioctl_sock < 0) {
1214                 perror("socket(PF_INET,SOCK_DGRAM)");
1215                 goto failed;
1216         }
1217
1218         if (wpa_driver_nl80211_init_link_events(drv) ||
1219             wpa_driver_nl80211_finish_drv_init(drv))
1220                 goto failed;
1221
1222         return drv;
1223
1224 failed:
1225         if (drv->link_event_sock >= 0) {
1226                 eloop_unregister_read_sock(drv->link_event_sock);
1227                 close(drv->link_event_sock);
1228         }
1229         if (drv->ioctl_sock >= 0)
1230                 close(drv->ioctl_sock);
1231
1232         genl_family_put(drv->nl80211);
1233         nl_cache_free(drv->nl_cache);
1234         nl_handle_destroy(drv->nl_handle);
1235         nl_cb_put(drv->nl_cb);
1236
1237         os_free(drv);
1238         return NULL;
1239 }
1240
1241
1242 static int
1243 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1244 {
1245         drv->ifindex = if_nametoindex(drv->ifname);
1246
1247 #ifndef HOSTAPD
1248         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1249                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1250                            "use managed mode");
1251         }
1252
1253         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1254                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1255                            "UP", drv->ifname);
1256                 return -1;
1257         }
1258
1259         wpa_driver_nl80211_capa(drv);
1260
1261         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1262 #endif /* HOSTAPD */
1263
1264         return 0;
1265 }
1266
1267
1268 #ifdef HOSTAPD
1269 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1270 {
1271         struct i802_bss *bss, *prev;
1272         bss = drv->bss.next;
1273         while (bss) {
1274                 prev = bss;
1275                 bss = bss->next;
1276                 os_free(bss);
1277         }
1278 }
1279 #endif /* HOSTAPD */
1280
1281
1282 /**
1283  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1284  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1285  *
1286  * Shut down driver interface and processing of driver events. Free
1287  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1288  */
1289 static void wpa_driver_nl80211_deinit(void *priv)
1290 {
1291         struct wpa_driver_nl80211_data *drv = priv;
1292
1293 #if defined(CONFIG_AP) || defined(HOSTAPD)
1294         if (drv->monitor_ifidx >= 0)
1295                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1296         if (drv->monitor_sock >= 0) {
1297                 eloop_unregister_read_sock(drv->monitor_sock);
1298                 close(drv->monitor_sock);
1299         }
1300 #endif /* CONFIG_AP || HOSTAPD */
1301
1302 #ifdef HOSTAPD
1303         if (drv->last_freq_ht) {
1304                 /* Clear HT flags from the driver */
1305                 struct hostapd_freq_params freq;
1306                 os_memset(&freq, 0, sizeof(freq));
1307                 freq.freq = drv->last_freq;
1308                 i802_set_freq(priv, &freq);
1309         }
1310
1311         i802_del_beacon(drv);
1312
1313         if (drv->eapol_sock >= 0) {
1314                 eloop_unregister_read_sock(drv->eapol_sock);
1315                 close(drv->eapol_sock);
1316         }
1317
1318         if (drv->if_indices != drv->default_if_indices)
1319                 os_free(drv->if_indices);
1320
1321         wpa_driver_nl80211_free_bss(drv);
1322 #else /* HOSTAPD */
1323 #ifndef NO_WEXT
1324         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1325 #endif /* NO_WEXT */
1326
1327         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1328
1329         if (drv->link_event_sock >= 0) {
1330                 eloop_unregister_read_sock(drv->link_event_sock);
1331                 close(drv->link_event_sock);
1332         }
1333 #endif /* HOSTAPD */
1334
1335         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1336
1337         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1338         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1339
1340         if (drv->ioctl_sock >= 0)
1341                 close(drv->ioctl_sock);
1342
1343         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1344         genl_family_put(drv->nl80211);
1345         nl_cache_free(drv->nl_cache);
1346         nl_handle_destroy(drv->nl_handle);
1347         nl_cb_put(drv->nl_cb);
1348
1349         os_free(drv);
1350 }
1351
1352
1353 /**
1354  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1355  * @eloop_ctx: Driver private data
1356  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1357  *
1358  * This function can be used as registered timeout when starting a scan to
1359  * generate a scan completed event if the driver does not report this.
1360  */
1361 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1362 {
1363         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1364         if (drv->ap_scan_as_station) {
1365                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1366                 drv->ap_scan_as_station = 0;
1367         }
1368         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1369         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1370 }
1371
1372
1373 /**
1374  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1375  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1376  * @params: Scan parameters
1377  * Returns: 0 on success, -1 on failure
1378  */
1379 static int wpa_driver_nl80211_scan(void *priv,
1380                                    struct wpa_driver_scan_params *params)
1381 {
1382         struct wpa_driver_nl80211_data *drv = priv;
1383         int ret = 0, timeout;
1384         struct nl_msg *msg, *ssids, *freqs;
1385         size_t i;
1386
1387         msg = nlmsg_alloc();
1388         ssids = nlmsg_alloc();
1389         freqs = nlmsg_alloc();
1390         if (!msg || !ssids || !freqs) {
1391                 nlmsg_free(msg);
1392                 nlmsg_free(ssids);
1393                 nlmsg_free(freqs);
1394                 return -1;
1395         }
1396
1397         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1398                     NL80211_CMD_TRIGGER_SCAN, 0);
1399
1400         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1401
1402         for (i = 0; i < params->num_ssids; i++) {
1403                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1404                         params->ssids[i].ssid);
1405         }
1406         if (params->num_ssids)
1407                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1408
1409         if (params->extra_ies) {
1410                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1411                         params->extra_ies);
1412         }
1413
1414         if (params->freqs) {
1415                 for (i = 0; params->freqs[i]; i++)
1416                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1417                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1418         }
1419
1420         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1421         msg = NULL;
1422         if (ret) {
1423                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1424                            "(%s)", ret, strerror(-ret));
1425 #ifdef HOSTAPD
1426                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1427                         /*
1428                          * mac80211 does not allow scan requests in AP mode, so
1429                          * try to do this in station mode.
1430                          */
1431                         if (wpa_driver_nl80211_set_mode(drv,
1432                                                         IEEE80211_MODE_INFRA))
1433                                 goto nla_put_failure;
1434
1435                         if (wpa_driver_nl80211_scan(drv, params)) {
1436                                 wpa_driver_nl80211_set_mode(drv,
1437                                                             IEEE80211_MODE_AP);
1438                                 goto nla_put_failure;
1439                         }
1440
1441                         /* Restore AP mode when processing scan results */
1442                         drv->ap_scan_as_station = 1;
1443                         ret = 0;
1444                 } else
1445                         goto nla_put_failure;
1446 #else /* HOSTAPD */
1447                 goto nla_put_failure;
1448 #endif /* HOSTAPD */
1449         }
1450
1451         /* Not all drivers generate "scan completed" wireless event, so try to
1452          * read results after a timeout. */
1453         timeout = 10;
1454         if (drv->scan_complete_events) {
1455                 /*
1456                  * The driver seems to deliver events to notify when scan is
1457                  * complete, so use longer timeout to avoid race conditions
1458                  * with scanning and following association request.
1459                  */
1460                 timeout = 30;
1461         }
1462         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1463                    "seconds", ret, timeout);
1464         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1465         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1466                                drv, drv->ctx);
1467
1468 nla_put_failure:
1469         nlmsg_free(ssids);
1470         nlmsg_free(msg);
1471         nlmsg_free(freqs);
1472         return ret;
1473 }
1474
1475
1476 static int bss_info_handler(struct nl_msg *msg, void *arg)
1477 {
1478         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1479         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1480         struct nlattr *bss[NL80211_BSS_MAX + 1];
1481         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1482                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1483                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1484                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1485                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1486                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1487                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1488                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1489                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1490         };
1491         struct wpa_scan_results *res = arg;
1492         struct wpa_scan_res **tmp;
1493         struct wpa_scan_res *r;
1494         const u8 *ie;
1495         size_t ie_len;
1496
1497         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1498                   genlmsg_attrlen(gnlh, 0), NULL);
1499         if (!tb[NL80211_ATTR_BSS])
1500                 return NL_SKIP;
1501         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1502                              bss_policy))
1503                 return NL_SKIP;
1504         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1505                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1506                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1507         } else {
1508                 ie = NULL;
1509                 ie_len = 0;
1510         }
1511
1512         r = os_zalloc(sizeof(*r) + ie_len);
1513         if (r == NULL)
1514                 return NL_SKIP;
1515         if (bss[NL80211_BSS_BSSID])
1516                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1517                           ETH_ALEN);
1518         if (bss[NL80211_BSS_FREQUENCY])
1519                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1520         if (bss[NL80211_BSS_BEACON_INTERVAL])
1521                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1522         if (bss[NL80211_BSS_CAPABILITY])
1523                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1524         r->flags |= WPA_SCAN_NOISE_INVALID;
1525         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1526                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1527                 r->level /= 100; /* mBm to dBm */
1528                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1529         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1530                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1531                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1532         } else
1533                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1534         if (bss[NL80211_BSS_TSF])
1535                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1536         r->ie_len = ie_len;
1537         if (ie)
1538                 os_memcpy(r + 1, ie, ie_len);
1539
1540         tmp = os_realloc(res->res,
1541                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1542         if (tmp == NULL) {
1543                 os_free(r);
1544                 return NL_SKIP;
1545         }
1546         tmp[res->num++] = r;
1547         res->res = tmp;
1548
1549         return NL_SKIP;
1550 }
1551
1552
1553 /**
1554  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1555  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1556  * Returns: Scan results on success, -1 on failure
1557  */
1558 static struct wpa_scan_results *
1559 wpa_driver_nl80211_get_scan_results(void *priv)
1560 {
1561         struct wpa_driver_nl80211_data *drv = priv;
1562         struct nl_msg *msg;
1563         struct wpa_scan_results *res;
1564         int ret;
1565
1566         res = os_zalloc(sizeof(*res));
1567         if (res == NULL)
1568                 return 0;
1569         msg = nlmsg_alloc();
1570         if (!msg)
1571                 goto nla_put_failure;
1572
1573         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1574                     NL80211_CMD_GET_SCAN, 0);
1575         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1576
1577         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1578         msg = NULL;
1579         if (ret == 0) {
1580                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1581                            (unsigned long) res->num);
1582                 return res;
1583         }
1584         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1585                    "(%s)", ret, strerror(-ret));
1586 nla_put_failure:
1587         nlmsg_free(msg);
1588         wpa_scan_results_free(res);
1589         return NULL;
1590 }
1591
1592
1593 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1594                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1595                        const u8 *seq, size_t seq_len,
1596                        const u8 *key, size_t key_len)
1597 {
1598         struct nl_msg *msg;
1599         int ret;
1600
1601         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1602                    "set_tx=%d seq_len=%lu key_len=%lu",
1603                    __func__, ifindex, alg, addr, key_idx, set_tx,
1604                    (unsigned long) seq_len, (unsigned long) key_len);
1605
1606         msg = nlmsg_alloc();
1607         if (!msg)
1608                 return -ENOMEM;
1609
1610         if (alg == WPA_ALG_NONE) {
1611                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1612                             0, NL80211_CMD_DEL_KEY, 0);
1613         } else {
1614                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1615                             0, NL80211_CMD_NEW_KEY, 0);
1616                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1617                 switch (alg) {
1618                 case WPA_ALG_WEP:
1619                         if (key_len == 5)
1620                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1621                                             0x000FAC01);
1622                         else
1623                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1624                                             0x000FAC05);
1625                         break;
1626                 case WPA_ALG_TKIP:
1627                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1628                         break;
1629                 case WPA_ALG_CCMP:
1630                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1631                         break;
1632                 case WPA_ALG_IGTK:
1633                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1634                         break;
1635                 default:
1636                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1637                                    "algorithm %d", __func__, alg);
1638                         nlmsg_free(msg);
1639                         return -1;
1640                 }
1641         }
1642
1643         if (seq)
1644                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1645
1646         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1647         {
1648                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1649                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1650         }
1651         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1652         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1653
1654         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1655         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1656                 ret = 0;
1657         if (ret)
1658                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1659                            ret, strerror(-ret));
1660
1661         /*
1662          * If we failed or don't need to set the default TX key (below),
1663          * we're done here.
1664          */
1665         if (ret || !set_tx || alg == WPA_ALG_NONE)
1666                 return ret;
1667 #ifdef HOSTAPD /* FIX: is this needed? */
1668         if (addr)
1669                 return ret;
1670 #endif /* HOSTAPD */
1671
1672         msg = nlmsg_alloc();
1673         if (!msg)
1674                 return -ENOMEM;
1675
1676         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1677                     0, NL80211_CMD_SET_KEY, 0);
1678         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1679         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1680         if (alg == WPA_ALG_IGTK)
1681                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1682         else
1683                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1684
1685         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1686         if (ret == -ENOENT)
1687                 ret = 0;
1688         if (ret)
1689                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1690                            "err=%d %s)", ret, strerror(-ret));
1691         return ret;
1692
1693 nla_put_failure:
1694         return -ENOBUFS;
1695 }
1696
1697
1698 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1699                                       const u8 *addr, int key_idx,
1700                                       int set_tx, const u8 *seq,
1701                                       size_t seq_len,
1702                                       const u8 *key, size_t key_len)
1703 {
1704         struct wpa_driver_nl80211_data *drv = priv;
1705         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1706                            seq_len, key, key_len);
1707 }
1708
1709
1710 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1711                                    const u8 *addr, int cmd, u16 reason_code)
1712 {
1713         int ret = -1;
1714         struct nl_msg *msg;
1715
1716         msg = nlmsg_alloc();
1717         if (!msg)
1718                 return -1;
1719
1720         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1721
1722         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1723         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1724         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1725
1726         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1727         msg = NULL;
1728         if (ret) {
1729                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1730                            "(%s)", ret, strerror(-ret));
1731                 goto nla_put_failure;
1732         }
1733         ret = 0;
1734
1735 nla_put_failure:
1736         nlmsg_free(msg);
1737         return ret;
1738 }
1739
1740
1741 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1742                                              int reason_code)
1743 {
1744         struct wpa_driver_nl80211_data *drv = priv;
1745         wpa_printf(MSG_DEBUG, "%s", __func__);
1746         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1747                                        reason_code);
1748 }
1749
1750
1751 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1752                                            int reason_code)
1753 {
1754         struct wpa_driver_nl80211_data *drv = priv;
1755         wpa_printf(MSG_DEBUG, "%s", __func__);
1756         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1757                                        reason_code);
1758 }
1759
1760
1761 static int wpa_driver_nl80211_authenticate(
1762         void *priv, struct wpa_driver_auth_params *params)
1763 {
1764         struct wpa_driver_nl80211_data *drv = priv;
1765         int ret = -1, i;
1766         struct nl_msg *msg;
1767         enum nl80211_auth_type type;
1768
1769         drv->associated = 0;
1770
1771         msg = nlmsg_alloc();
1772         if (!msg)
1773                 return -1;
1774
1775         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1776                    drv->ifindex);
1777
1778         for (i = 0; i < 4; i++) {
1779                 if (!params->wep_key[i])
1780                         continue;
1781                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1782                                            i == params->wep_tx_keyidx, NULL, 0,
1783                                            params->wep_key[i],
1784                                            params->wep_key_len[i]);
1785         }
1786
1787         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1788                     NL80211_CMD_AUTHENTICATE, 0);
1789
1790         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1791         if (params->bssid) {
1792                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1793                            MAC2STR(params->bssid));
1794                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1795         }
1796         if (params->freq) {
1797                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1798                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1799         }
1800         if (params->ssid) {
1801                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1802                                   params->ssid, params->ssid_len);
1803                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1804                         params->ssid);
1805         }
1806         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1807         if (params->ie)
1808                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1809         /*
1810          * TODO: if multiple auth_alg options enabled, try them one by one if
1811          * the AP rejects authentication due to unknown auth alg
1812          */
1813         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1814                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1815         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1816                 type = NL80211_AUTHTYPE_SHARED_KEY;
1817         else if (params->auth_alg & AUTH_ALG_LEAP)
1818                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1819         else if (params->auth_alg & AUTH_ALG_FT)
1820                 type = NL80211_AUTHTYPE_FT;
1821         else
1822                 goto nla_put_failure;
1823         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1824         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1825
1826         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1827         msg = NULL;
1828         if (ret) {
1829                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1830                            "(%s)", ret, strerror(-ret));
1831                 goto nla_put_failure;
1832         }
1833         ret = 0;
1834         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1835                    "successfully");
1836
1837 nla_put_failure:
1838         nlmsg_free(msg);
1839         return ret;
1840 }
1841
1842
1843 #if defined(CONFIG_AP) || defined(HOSTAPD)
1844
1845 struct phy_info_arg {
1846         u16 *num_modes;
1847         struct hostapd_hw_modes *modes;
1848 };
1849
1850 static int phy_info_handler(struct nl_msg *msg, void *arg)
1851 {
1852         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1853         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1854         struct phy_info_arg *phy_info = arg;
1855
1856         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1857
1858         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1859         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1860                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1861                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1862                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1863                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1864                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1865                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1866         };
1867
1868         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1869         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1870                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1871                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1872         };
1873
1874         struct nlattr *nl_band;
1875         struct nlattr *nl_freq;
1876         struct nlattr *nl_rate;
1877         int rem_band, rem_freq, rem_rate;
1878         struct hostapd_hw_modes *mode;
1879         int idx, mode_is_set;
1880
1881         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1882                   genlmsg_attrlen(gnlh, 0), NULL);
1883
1884         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1885                 return NL_SKIP;
1886
1887         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1888                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1889                 if (!mode)
1890                         return NL_SKIP;
1891                 phy_info->modes = mode;
1892
1893                 mode_is_set = 0;
1894
1895                 mode = &phy_info->modes[*(phy_info->num_modes)];
1896                 memset(mode, 0, sizeof(*mode));
1897                 *(phy_info->num_modes) += 1;
1898
1899                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1900                           nla_len(nl_band), NULL);
1901
1902                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1903                         mode->ht_capab = nla_get_u16(
1904                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1905                 }
1906
1907                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1908                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1909                                   nla_len(nl_freq), freq_policy);
1910                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1911                                 continue;
1912                         mode->num_channels++;
1913                 }
1914
1915                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1916                 if (!mode->channels)
1917                         return NL_SKIP;
1918
1919                 idx = 0;
1920
1921                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1922                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1923                                   nla_len(nl_freq), freq_policy);
1924                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1925                                 continue;
1926
1927                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1928                         mode->channels[idx].flag = 0;
1929
1930                         if (!mode_is_set) {
1931                                 /* crude heuristic */
1932                                 if (mode->channels[idx].freq < 4000)
1933                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1934                                 else
1935                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1936                                 mode_is_set = 1;
1937                         }
1938
1939                         /* crude heuristic */
1940                         if (mode->channels[idx].freq < 4000)
1941                                 if (mode->channels[idx].freq == 2484)
1942                                         mode->channels[idx].chan = 14;
1943                                 else
1944                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1945                         else
1946                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1947
1948                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1949                                 mode->channels[idx].flag |=
1950                                         HOSTAPD_CHAN_DISABLED;
1951                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1952                                 mode->channels[idx].flag |=
1953                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1954                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1955                                 mode->channels[idx].flag |=
1956                                         HOSTAPD_CHAN_NO_IBSS;
1957                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1958                                 mode->channels[idx].flag |=
1959                                         HOSTAPD_CHAN_RADAR;
1960
1961                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1962                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1963                                 mode->channels[idx].max_tx_power =
1964                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1965
1966                         idx++;
1967                 }
1968
1969                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1970                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1971                                   nla_len(nl_rate), rate_policy);
1972                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1973                                 continue;
1974                         mode->num_rates++;
1975                 }
1976
1977                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1978                 if (!mode->rates)
1979                         return NL_SKIP;
1980
1981                 idx = 0;
1982
1983                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1984                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1985                                   nla_len(nl_rate), rate_policy);
1986                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1987                                 continue;
1988                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1989
1990                         /* crude heuristic */
1991                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1992                             mode->rates[idx].rate > 200)
1993                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1994
1995                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1996                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1997
1998                         idx++;
1999                 }
2000         }
2001
2002         return NL_SKIP;
2003 }
2004
2005 static struct hostapd_hw_modes *
2006 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2007 {
2008         u16 m;
2009         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2010         int i, mode11g_idx = -1;
2011
2012         /* If only 802.11g mode is included, use it to construct matching
2013          * 802.11b mode data. */
2014
2015         for (m = 0; m < *num_modes; m++) {
2016                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2017                         return modes; /* 802.11b already included */
2018                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2019                         mode11g_idx = m;
2020         }
2021
2022         if (mode11g_idx < 0)
2023                 return modes; /* 2.4 GHz band not supported at all */
2024
2025         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2026         if (nmodes == NULL)
2027                 return modes; /* Could not add 802.11b mode */
2028
2029         mode = &nmodes[*num_modes];
2030         os_memset(mode, 0, sizeof(*mode));
2031         (*num_modes)++;
2032         modes = nmodes;
2033
2034         mode->mode = HOSTAPD_MODE_IEEE80211B;
2035
2036         mode11g = &modes[mode11g_idx];
2037         mode->num_channels = mode11g->num_channels;
2038         mode->channels = os_malloc(mode11g->num_channels *
2039                                    sizeof(struct hostapd_channel_data));
2040         if (mode->channels == NULL) {
2041                 (*num_modes)--;
2042                 return modes; /* Could not add 802.11b mode */
2043         }
2044         os_memcpy(mode->channels, mode11g->channels,
2045                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2046
2047         mode->num_rates = 0;
2048         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2049         if (mode->rates == NULL) {
2050                 os_free(mode->channels);
2051                 (*num_modes)--;
2052                 return modes; /* Could not add 802.11b mode */
2053         }
2054
2055         for (i = 0; i < mode11g->num_rates; i++) {
2056                 if (mode11g->rates[i].rate > 110 ||
2057                     mode11g->rates[i].flags &
2058                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2059                         continue;
2060                 mode->rates[mode->num_rates] = mode11g->rates[i];
2061                 mode->num_rates++;
2062                 if (mode->num_rates == 4)
2063                         break;
2064         }
2065
2066         if (mode->num_rates == 0) {
2067                 os_free(mode->channels);
2068                 os_free(mode->rates);
2069                 (*num_modes)--;
2070                 return modes; /* No 802.11b rates */
2071         }
2072
2073         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2074                    "information");
2075
2076         return modes;
2077 }
2078
2079
2080 static struct hostapd_hw_modes *
2081 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2082 {
2083         struct wpa_driver_nl80211_data *drv = priv;
2084         struct nl_msg *msg;
2085         struct phy_info_arg result = {
2086                 .num_modes = num_modes,
2087                 .modes = NULL,
2088         };
2089
2090         *num_modes = 0;
2091         *flags = 0;
2092
2093         msg = nlmsg_alloc();
2094         if (!msg)
2095                 return NULL;
2096
2097         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2098                     0, NL80211_CMD_GET_WIPHY, 0);
2099
2100         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2101
2102         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2103                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2104  nla_put_failure:
2105         return NULL;
2106 }
2107
2108
2109 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2110                                          const void *data, size_t len,
2111                                          int encrypt)
2112 {
2113         __u8 rtap_hdr[] = {
2114                 0x00, 0x00, /* radiotap version */
2115                 0x0e, 0x00, /* radiotap length */
2116                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2117                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2118                 0x00,       /* padding */
2119                 0x00, 0x00, /* RX and TX flags to indicate that */
2120                 0x00, 0x00, /* this is the injected frame directly */
2121         };
2122         struct iovec iov[2] = {
2123                 {
2124                         .iov_base = &rtap_hdr,
2125                         .iov_len = sizeof(rtap_hdr),
2126                 },
2127                 {
2128                         .iov_base = (void *) data,
2129                         .iov_len = len,
2130                 }
2131         };
2132         struct msghdr msg = {
2133                 .msg_name = NULL,
2134                 .msg_namelen = 0,
2135                 .msg_iov = iov,
2136                 .msg_iovlen = 2,
2137                 .msg_control = NULL,
2138                 .msg_controllen = 0,
2139                 .msg_flags = 0,
2140         };
2141
2142         if (encrypt)
2143                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2144
2145         return sendmsg(drv->monitor_sock, &msg, 0);
2146 }
2147
2148
2149 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2150                                         size_t data_len)
2151 {
2152         struct wpa_driver_nl80211_data *drv = priv;
2153         struct ieee80211_mgmt *mgmt;
2154         int do_not_encrypt = 0;
2155         u16 fc;
2156
2157         mgmt = (struct ieee80211_mgmt *) data;
2158         fc = le_to_host16(mgmt->frame_control);
2159
2160         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2161             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2162                 /*
2163                  * Only one of the authentication frame types is encrypted.
2164                  * In order for static WEP encryption to work properly (i.e.,
2165                  * to not encrypt the frame), we need to tell mac80211 about
2166                  * the frames that must not be encrypted.
2167                  */
2168                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2169                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2170                 if (auth_alg == WLAN_AUTH_OPEN ||
2171                     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2172                         do_not_encrypt = 1;
2173         }
2174
2175         return wpa_driver_nl80211_send_frame(drv, data, data_len,
2176                                              !do_not_encrypt);
2177 }
2178
2179
2180 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2181                                                const u8 *head, size_t head_len,
2182                                                const u8 *tail, size_t tail_len,
2183                                                int dtim_period)
2184 {
2185         struct wpa_driver_nl80211_data *drv = priv;
2186         struct nl_msg *msg;
2187         u8 cmd = NL80211_CMD_NEW_BEACON;
2188         int ret;
2189         int beacon_set;
2190 #ifdef HOSTAPD
2191         struct i802_bss *bss;
2192
2193         bss = get_bss(drv, ifindex);
2194         if (bss == NULL)
2195                 return -ENOENT;
2196         beacon_set = bss->beacon_set;
2197 #else /* HOSTAPD */
2198         beacon_set = drv->beacon_set;
2199 #endif /* HOSTAPD */
2200
2201         msg = nlmsg_alloc();
2202         if (!msg)
2203                 return -ENOMEM;
2204
2205         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2206                    beacon_set);
2207         if (beacon_set)
2208                 cmd = NL80211_CMD_SET_BEACON;
2209
2210         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2211                     0, cmd, 0);
2212         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2213         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2214         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2215         if (!drv->beacon_int)
2216                 drv->beacon_int = 100;
2217         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2218         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2219
2220         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2221         if (ret) {
2222                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2223                            ret, strerror(-ret));
2224         } else {
2225 #ifdef HOSTAPD
2226                 bss->beacon_set = 1;
2227 #else /* HOSTAPD */
2228                 drv->beacon_set = 1;
2229 #endif /* HOSTAPD */
2230         }
2231         return ret;
2232  nla_put_failure:
2233         return -ENOBUFS;
2234 }
2235
2236
2237 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2238 {
2239         struct wpa_driver_nl80211_data *drv = priv;
2240         struct nl_msg *msg;
2241
2242         drv->beacon_int = value;
2243
2244 #ifdef HOSTAPD
2245         if (!drv->bss.beacon_set)
2246                 return 0;
2247 #else /* HOSTAPD */
2248         if (!drv->beacon_set)
2249                 return 0;
2250 #endif /* HOSTAPD */
2251
2252         msg = nlmsg_alloc();
2253         if (!msg)
2254                 return -ENOMEM;
2255
2256         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2257         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2258                     0, NL80211_CMD_SET_BEACON, 0);
2259         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2260
2261         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2262
2263         return send_and_recv_msgs(drv, msg, NULL, NULL);
2264  nla_put_failure:
2265         return -ENOBUFS;
2266 }
2267
2268
2269 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2270                                        int freq, int ht_enabled,
2271                                        int sec_channel_offset)
2272 {
2273         struct nl_msg *msg;
2274         int ret;
2275
2276         msg = nlmsg_alloc();
2277         if (!msg)
2278                 return -1;
2279
2280         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2281                     NL80211_CMD_SET_WIPHY, 0);
2282
2283         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2284         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2285         if (ht_enabled) {
2286                 switch (sec_channel_offset) {
2287                 case -1:
2288                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2289                                     NL80211_CHAN_HT40MINUS);
2290                         break;
2291                 case 1:
2292                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2293                                     NL80211_CHAN_HT40PLUS);
2294                         break;
2295                 default:
2296                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2297                                     NL80211_CHAN_HT20);
2298                         break;
2299                 }
2300         }
2301
2302         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2303         if (ret == 0)
2304                 return 0;
2305         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2306                    "%d (%s)", freq, ret, strerror(-ret));
2307 nla_put_failure:
2308         return -1;
2309 }
2310
2311 #endif /* CONFIG_AP || HOSTAPD */
2312
2313
2314 #ifdef CONFIG_AP
2315
2316 static int wpa_driver_nl80211_set_beacon(void *priv,
2317                                          const u8 *head, size_t head_len,
2318                                          const u8 *tail, size_t tail_len,
2319                                          int dtim_period)
2320 {
2321         struct wpa_driver_nl80211_data *drv = priv;
2322         return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2323                                                    head, head_len,
2324                                                    tail, tail_len,
2325                                                    dtim_period);
2326 }
2327
2328 #endif /* CONFIG_AP */
2329
2330 #if defined(CONFIG_AP) || defined(HOSTAPD)
2331
2332 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2333                                  int ifidx)
2334 {
2335         struct nl_msg *msg;
2336
2337 #ifdef HOSTAPD
2338         /* stop listening for EAPOL on this interface */
2339         del_ifidx(drv, ifidx);
2340 #endif /* HOSTAPD */
2341
2342         msg = nlmsg_alloc();
2343         if (!msg)
2344                 goto nla_put_failure;
2345
2346         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2347                     0, NL80211_CMD_DEL_INTERFACE, 0);
2348         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2349
2350         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2351                 return;
2352  nla_put_failure:
2353         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2354                    ifidx);
2355 }
2356
2357
2358 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2359                                 const char *ifname, enum nl80211_iftype iftype,
2360                                 const u8 *addr)
2361 {
2362         struct nl_msg *msg, *flags = NULL;
2363         int ifidx;
2364         int ret = -ENOBUFS;
2365
2366         msg = nlmsg_alloc();
2367         if (!msg)
2368                 return -1;
2369
2370         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2371                     0, NL80211_CMD_NEW_INTERFACE, 0);
2372         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2373         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2374         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2375
2376         if (iftype == NL80211_IFTYPE_MONITOR) {
2377                 int err;
2378
2379                 flags = nlmsg_alloc();
2380                 if (!flags)
2381                         goto nla_put_failure;
2382
2383                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2384
2385                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2386
2387                 nlmsg_free(flags);
2388
2389                 if (err)
2390                         goto nla_put_failure;
2391         }
2392
2393         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2394         if (ret) {
2395  nla_put_failure:
2396                 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2397                            ifname);
2398                 return ret;
2399         }
2400
2401         ifidx = if_nametoindex(ifname);
2402
2403         if (ifidx <= 0)
2404                 return -1;
2405
2406 #ifdef HOSTAPD
2407         /* start listening for EAPOL on this interface */
2408         add_ifidx(drv, ifidx);
2409
2410         if (addr && iftype == NL80211_IFTYPE_AP &&
2411             set_ifhwaddr(drv, ifname, addr)) {
2412                 nl80211_remove_iface(drv, ifidx);
2413                 return -1;
2414         }
2415 #endif /* HOSTAPD */
2416
2417         return ifidx;
2418 }
2419
2420 #endif /* CONFIG_AP || HOSTAPD */
2421
2422 #ifdef CONFIG_AP
2423
2424 void ap_tx_status(void *ctx, const u8 *addr,
2425                   const u8 *buf, size_t len, int ack);
2426 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2427 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2428                 struct hostapd_frame_info *fi);
2429 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2430
2431 #endif /* CONFIG_AP */
2432
2433 #if defined(CONFIG_AP) || defined(HOSTAPD)
2434
2435 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2436 {
2437         struct ieee80211_hdr *hdr;
2438         u16 fc, type, stype;
2439
2440         hdr = (struct ieee80211_hdr *) buf;
2441         fc = le_to_host16(hdr->frame_control);
2442
2443         type = WLAN_FC_GET_TYPE(fc);
2444         stype = WLAN_FC_GET_STYPE(fc);
2445
2446         switch (type) {
2447         case WLAN_FC_TYPE_MGMT:
2448                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2449                            ok ? "ACK" : "fail");
2450 #ifdef HOSTAPD
2451                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2452 #else /* HOSTAPD */
2453                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2454 #endif /* HOSTAPD */
2455                 break;
2456         case WLAN_FC_TYPE_CTRL:
2457                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2458                            ok ? "ACK" : "fail");
2459                 break;
2460         case WLAN_FC_TYPE_DATA:
2461 #ifdef HOSTAPD
2462                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2463 #else /* HOSTAPD */
2464                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2465 #endif /* HOSTAPD */
2466                 break;
2467         default:
2468                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2469                            type);
2470                 break;
2471         }
2472 }
2473
2474
2475 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2476                          u8 *buf, size_t len,
2477                          struct hostapd_frame_info *hfi,
2478                          enum ieee80211_msg_type msg_type)
2479 {
2480         struct ieee80211_hdr *hdr;
2481         u16 fc, type, stype;
2482         size_t data_len = len;
2483         u8 *bssid;
2484         void *ctx = drv->ctx;
2485 #ifdef HOSTAPD
2486         struct hostapd_iface *iface = drv->hapd->iface;
2487         struct hostapd_data *hapd = NULL;
2488         int broadcast_bssid = 0;
2489         size_t i;
2490 #endif /* HOSTAPD */
2491
2492         /*
2493          * PS-Poll frames are 16 bytes. All other frames are
2494          * 24 bytes or longer.
2495          */
2496         if (len < 16)
2497                 return;
2498
2499         hdr = (struct ieee80211_hdr *) buf;
2500         fc = le_to_host16(hdr->frame_control);
2501
2502         type = WLAN_FC_GET_TYPE(fc);
2503         stype = WLAN_FC_GET_STYPE(fc);
2504
2505         switch (type) {
2506         case WLAN_FC_TYPE_DATA:
2507                 if (len < 24)
2508                         return;
2509                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2510                 case WLAN_FC_TODS:
2511                         bssid = hdr->addr1;
2512                         break;
2513                 case WLAN_FC_FROMDS:
2514                         bssid = hdr->addr2;
2515                         break;
2516                 default:
2517                         /* discard */
2518                         return;
2519                 }
2520                 break;
2521         case WLAN_FC_TYPE_CTRL:
2522                 /* discard non-ps-poll frames */
2523                 if (stype != WLAN_FC_STYPE_PSPOLL)
2524                         return;
2525                 bssid = hdr->addr1;
2526                 break;
2527         case WLAN_FC_TYPE_MGMT:
2528                 bssid = hdr->addr3;
2529                 break;
2530         default:
2531                 /* discard */
2532                 return;
2533         }
2534
2535 #ifdef HOSTAPD
2536         /* find interface frame belongs to */
2537         for (i = 0; i < iface->num_bss; i++) {
2538                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
2539                         hapd = iface->bss[i];
2540                         break;
2541                 }
2542         }
2543
2544         if (hapd == NULL) {
2545                 hapd = iface->bss[0];
2546
2547                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
2548                     bssid[2] != 0xff || bssid[3] != 0xff ||
2549                     bssid[4] != 0xff || bssid[5] != 0xff) {
2550                         /*
2551                          * Unknown BSSID - drop frame if this is not from
2552                          * passive scanning or a beacon (at least ProbeReq
2553                          * frames to other APs may be allowed through RX
2554                          * filtering in the wlan hw/driver)
2555                          */
2556                         if ((type != WLAN_FC_TYPE_MGMT ||
2557                              stype != WLAN_FC_STYPE_BEACON))
2558                                 return;
2559                 } else
2560                         broadcast_bssid = 1;
2561         }
2562         ctx = hapd;
2563 #endif /* HOSTAPD */
2564
2565         switch (msg_type) {
2566         case ieee80211_msg_normal:
2567                 /* continue processing */
2568                 break;
2569         case ieee80211_msg_tx_callback_ack:
2570                 handle_tx_callback(ctx, buf, data_len, 1);
2571                 return;
2572         case ieee80211_msg_tx_callback_fail:
2573                 handle_tx_callback(ctx, buf, data_len, 0);
2574                 return;
2575         }
2576
2577         switch (type) {
2578         case WLAN_FC_TYPE_MGMT:
2579                 if (stype != WLAN_FC_STYPE_BEACON &&
2580                     stype != WLAN_FC_STYPE_PROBE_REQ)
2581                         wpa_printf(MSG_MSGDUMP, "MGMT");
2582 #ifdef HOSTAPD
2583                 if (broadcast_bssid) {
2584                         for (i = 0; i < iface->num_bss; i++)
2585                                 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
2586                                                 stype, hfi);
2587                 } else
2588                         hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
2589 #else /* HOSTAPD */
2590                 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2591 #endif /* HOSTAPD */
2592                 break;
2593         case WLAN_FC_TYPE_CTRL:
2594                 /* can only get here with PS-Poll frames */
2595                 wpa_printf(MSG_DEBUG, "CTRL");
2596 #ifdef HOSTAPD
2597                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
2598 #else /* HOSTAPD */
2599                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2600 #endif /* HOSTAPD */
2601                 break;
2602         case WLAN_FC_TYPE_DATA:
2603 #ifdef HOSTAPD
2604                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
2605 #else /* HOSTAPD */
2606                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2607 #endif /* HOSTAPD */
2608                 break;
2609         }
2610 }
2611
2612
2613 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2614 {
2615         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2616         int len;
2617         unsigned char buf[3000];
2618         struct ieee80211_radiotap_iterator iter;
2619         int ret;
2620         struct hostapd_frame_info hfi;
2621         int injected = 0, failed = 0, msg_type, rxflags = 0;
2622
2623         len = recv(sock, buf, sizeof(buf), 0);
2624         if (len < 0) {
2625                 perror("recv");
2626                 return;
2627         }
2628
2629         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2630                 printf("received invalid radiotap frame\n");
2631                 return;
2632         }
2633
2634         memset(&hfi, 0, sizeof(hfi));
2635
2636         while (1) {
2637                 ret = ieee80211_radiotap_iterator_next(&iter);
2638                 if (ret == -ENOENT)
2639                         break;
2640                 if (ret) {
2641                         printf("received invalid radiotap frame (%d)\n", ret);
2642                         return;
2643                 }
2644                 switch (iter.this_arg_index) {
2645                 case IEEE80211_RADIOTAP_FLAGS:
2646                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2647                                 len -= 4;
2648                         break;
2649                 case IEEE80211_RADIOTAP_RX_FLAGS:
2650                         rxflags = 1;
2651                         break;
2652                 case IEEE80211_RADIOTAP_TX_FLAGS:
2653                         injected = 1;
2654                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2655                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2656                         break;
2657                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2658                         break;
2659                 case IEEE80211_RADIOTAP_CHANNEL:
2660                         /* TODO convert from freq/flags to channel number
2661                         hfi.channel = XXX;
2662                         hfi.phytype = XXX;
2663                          */
2664                         break;
2665                 case IEEE80211_RADIOTAP_RATE:
2666                         hfi.datarate = *iter.this_arg * 5;
2667                         break;
2668                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2669                         hfi.ssi_signal = *iter.this_arg;
2670                         break;
2671                 }
2672         }
2673
2674         if (rxflags && injected)
2675                 return;
2676
2677         if (!injected)
2678                 msg_type = ieee80211_msg_normal;
2679         else if (failed)
2680                 msg_type = ieee80211_msg_tx_callback_fail;
2681         else
2682                 msg_type = ieee80211_msg_tx_callback_ack;
2683
2684         handle_frame(drv, buf + iter.max_length,
2685                      len - iter.max_length, &hfi, msg_type);
2686 }
2687
2688
2689 /*
2690  * we post-process the filter code later and rewrite
2691  * this to the offset to the last instruction
2692  */
2693 #define PASS    0xFF
2694 #define FAIL    0xFE
2695
2696 static struct sock_filter msock_filter_insns[] = {
2697         /*
2698          * do a little-endian load of the radiotap length field
2699          */
2700         /* load lower byte into A */
2701         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2702         /* put it into X (== index register) */
2703         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2704         /* load upper byte into A */
2705         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2706         /* left-shift it by 8 */
2707         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2708         /* or with X */
2709         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2710         /* put result into X */
2711         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2712
2713         /*
2714          * Allow management frames through, this also gives us those
2715          * management frames that we sent ourselves with status
2716          */
2717         /* load the lower byte of the IEEE 802.11 frame control field */
2718         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2719         /* mask off frame type and version */
2720         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2721         /* accept frame if it's both 0, fall through otherwise */
2722         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2723
2724         /*
2725          * TODO: add a bit to radiotap RX flags that indicates
2726          * that the sending station is not associated, then
2727          * add a filter here that filters on our DA and that flag
2728          * to allow us to deauth frames to that bad station.
2729          *
2730          * Not a regression -- we didn't do it before either.
2731          */
2732
2733 #if 0
2734         /*
2735          * drop non-data frames, WDS frames
2736          */
2737         /* load the lower byte of the frame control field */
2738         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2739         /* mask off QoS bit */
2740         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2741         /* drop non-data frames */
2742         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2743         /* load the upper byte of the frame control field */
2744         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2745         /* mask off toDS/fromDS */
2746         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2747         /* drop WDS frames */
2748         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2749 #endif
2750
2751         /*
2752          * add header length to index
2753          */
2754         /* load the lower byte of the frame control field */
2755         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2756         /* mask off QoS bit */
2757         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2758         /* right shift it by 6 to give 0 or 2 */
2759         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2760         /* add data frame header length */
2761         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2762         /* add index, was start of 802.11 header */
2763         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2764         /* move to index, now start of LL header */
2765         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2766
2767         /*
2768          * Accept empty data frames, we use those for
2769          * polling activity.
2770          */
2771         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2772         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2773
2774         /*
2775          * Accept EAPOL frames
2776          */
2777         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2778         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2779         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2780         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2781
2782         /* keep these last two statements or change the code below */
2783         /* return 0 == "DROP" */
2784         BPF_STMT(BPF_RET | BPF_K, 0),
2785         /* return ~0 == "keep all" */
2786         BPF_STMT(BPF_RET | BPF_K, ~0),
2787 };
2788
2789 static struct sock_fprog msock_filter = {
2790         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2791         .filter = msock_filter_insns,
2792 };
2793
2794
2795 static int add_monitor_filter(int s)
2796 {
2797         int idx;
2798
2799         /* rewrite all PASS/FAIL jump offsets */
2800         for (idx = 0; idx < msock_filter.len; idx++) {
2801                 struct sock_filter *insn = &msock_filter_insns[idx];
2802
2803                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2804                         if (insn->code == (BPF_JMP|BPF_JA)) {
2805                                 if (insn->k == PASS)
2806                                         insn->k = msock_filter.len - idx - 2;
2807                                 else if (insn->k == FAIL)
2808                                         insn->k = msock_filter.len - idx - 3;
2809                         }
2810
2811                         if (insn->jt == PASS)
2812                                 insn->jt = msock_filter.len - idx - 2;
2813                         else if (insn->jt == FAIL)
2814                                 insn->jt = msock_filter.len - idx - 3;
2815
2816                         if (insn->jf == PASS)
2817                                 insn->jf = msock_filter.len - idx - 2;
2818                         else if (insn->jf == FAIL)
2819                                 insn->jf = msock_filter.len - idx - 3;
2820                 }
2821         }
2822
2823         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2824                        &msock_filter, sizeof(msock_filter))) {
2825                 perror("SO_ATTACH_FILTER");
2826                 return -1;
2827         }
2828
2829         return 0;
2830 }
2831
2832
2833 static int
2834 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2835 {
2836         char buf[IFNAMSIZ];
2837         struct sockaddr_ll ll;
2838         int optval;
2839         socklen_t optlen;
2840
2841         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2842         buf[IFNAMSIZ - 1] = '\0';
2843
2844         drv->monitor_ifidx =
2845                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2846
2847         if (drv->monitor_ifidx < 0)
2848                 return -1;
2849
2850         if (hostapd_set_iface_flags(drv, buf, 1))
2851                 goto error;
2852
2853         memset(&ll, 0, sizeof(ll));
2854         ll.sll_family = AF_PACKET;
2855         ll.sll_ifindex = drv->monitor_ifidx;
2856         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2857         if (drv->monitor_sock < 0) {
2858                 perror("socket[PF_PACKET,SOCK_RAW]");
2859                 goto error;
2860         }
2861
2862         if (add_monitor_filter(drv->monitor_sock)) {
2863                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2864                            "interface; do filtering in user space");
2865                 /* This works, but will cost in performance. */
2866         }
2867
2868         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2869                 perror("monitor socket bind");
2870                 goto error;
2871         }
2872
2873         optlen = sizeof(optval);
2874         optval = 20;
2875         if (setsockopt
2876             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2877                 perror("Failed to set socket priority");
2878                 goto error;
2879         }
2880
2881         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2882                                      drv, NULL)) {
2883                 printf("Could not register monitor read socket\n");
2884                 goto error;
2885         }
2886
2887         return 0;
2888  error:
2889         nl80211_remove_iface(drv, drv->monitor_ifidx);
2890         return -1;
2891 }
2892
2893 #endif /* CONFIG_AP || HOSTAPD */
2894
2895 #ifdef CONFIG_AP
2896
2897 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2898                                  struct wpa_driver_associate_params *params)
2899 {
2900         if (drv->monitor_ifidx < 0 &&
2901             nl80211_create_monitor_interface(drv))
2902                 return -1;
2903
2904         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2905             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
2906                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2907                 drv->monitor_ifidx = -1;
2908                 return -1;
2909         }
2910
2911         /* TODO: setup monitor interface (and add code somewhere to remove this
2912          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2913
2914         return 0;
2915 }
2916 #endif /* CONFIG_AP */
2917
2918
2919 static int wpa_driver_nl80211_associate(
2920         void *priv, struct wpa_driver_associate_params *params)
2921 {
2922         struct wpa_driver_nl80211_data *drv = priv;
2923         int ret = -1;
2924         struct nl_msg *msg;
2925
2926 #ifdef CONFIG_AP
2927         if (params->mode == 2)
2928                 return wpa_driver_nl80211_ap(drv, params);
2929 #endif /* CONFIG_AP */
2930
2931 #ifndef NO_WEXT
2932         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2933                                           params->drop_unencrypted);
2934 #endif /* NO_WEXT */
2935
2936         drv->associated = 0;
2937
2938         msg = nlmsg_alloc();
2939         if (!msg)
2940                 return -1;
2941
2942         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2943                    drv->ifindex);
2944         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2945                     NL80211_CMD_ASSOCIATE, 0);
2946
2947         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2948         if (params->bssid) {
2949                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2950                            MAC2STR(params->bssid));
2951                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2952         }
2953         if (params->freq) {
2954                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2955                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2956         }
2957         if (params->ssid) {
2958                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2959                                   params->ssid, params->ssid_len);
2960                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2961                         params->ssid);
2962                 if (params->ssid_len > sizeof(drv->ssid))
2963                         goto nla_put_failure;
2964                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2965                 drv->ssid_len = params->ssid_len;
2966         }
2967         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
2968         if (params->wpa_ie)
2969                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2970                         params->wpa_ie);
2971
2972         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2973         msg = NULL;
2974         if (ret) {
2975                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2976                            "(%s)", ret, strerror(-ret));
2977                 goto nla_put_failure;
2978         }
2979         ret = 0;
2980         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2981                    "successfully");
2982
2983 nla_put_failure:
2984         nlmsg_free(msg);
2985         return ret;
2986 }
2987
2988
2989 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2990                             int ifindex, int mode)
2991 {
2992         struct nl_msg *msg;
2993         int ret = -ENOBUFS;
2994
2995         msg = nlmsg_alloc();
2996         if (!msg)
2997                 return -ENOMEM;
2998
2999         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3000                     0, NL80211_CMD_SET_INTERFACE, 0);
3001         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3002         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3003
3004         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3005         if (!ret)
3006                 return 0;
3007 nla_put_failure:
3008         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3009                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3010         return ret;
3011 }
3012
3013
3014 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3015 {
3016         struct wpa_driver_nl80211_data *drv = priv;
3017         int ret = -1;
3018         int nlmode;
3019
3020         switch (mode) {
3021         case 0:
3022                 nlmode = NL80211_IFTYPE_STATION;
3023                 break;
3024         case 1:
3025                 nlmode = NL80211_IFTYPE_ADHOC;
3026                 break;
3027         case 2:
3028                 nlmode = NL80211_IFTYPE_AP;
3029                 break;
3030         default:
3031                 return -1;
3032         }
3033
3034         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3035                 drv->nlmode = nlmode;
3036                 return 0;
3037         }
3038
3039         if (nlmode == drv->nlmode)
3040                 return 0; /* Already in the requested mode */
3041
3042         /* mac80211 doesn't allow mode changes while the device is up, so
3043          * take the device down, try to set the mode again, and bring the
3044          * device back up.
3045          */
3046         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3047                 /* Try to set the mode again while the interface is down */
3048                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3049                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3050                         ret = -1;
3051         }
3052
3053         if (!ret)
3054                 drv->nlmode = nlmode;
3055
3056         return ret;
3057 }
3058
3059
3060 static int wpa_driver_nl80211_get_capa(void *priv,
3061                                        struct wpa_driver_capa *capa)
3062 {
3063         struct wpa_driver_nl80211_data *drv = priv;
3064         if (!drv->has_capability)
3065                 return -1;
3066         os_memcpy(capa, &drv->capa, sizeof(*capa));
3067         return 0;
3068 }
3069
3070
3071 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3072 {
3073         struct wpa_driver_nl80211_data *drv = priv;
3074
3075         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3076                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3077         drv->operstate = state;
3078         return wpa_driver_nl80211_send_oper_ifla(
3079                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3080 }
3081
3082
3083 #ifdef HOSTAPD
3084
3085 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3086
3087 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
3088 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
3089
3090
3091 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3092                                  int ifindex)
3093 {
3094         struct i802_bss *bss = &drv->bss;
3095         while (bss) {
3096                 if (ifindex == bss->ifindex)
3097                         return bss;
3098                 bss = bss->next;
3099         }
3100         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3101         return NULL;
3102 }
3103
3104
3105 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3106 {
3107         int i;
3108         int *old;
3109
3110         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3111                    ifidx);
3112         for (i = 0; i < drv->num_if_indices; i++) {
3113                 if (drv->if_indices[i] == 0) {
3114                         drv->if_indices[i] = ifidx;
3115                         return;
3116                 }
3117         }
3118
3119         if (drv->if_indices != drv->default_if_indices)
3120                 old = drv->if_indices;
3121         else
3122                 old = NULL;
3123
3124         drv->if_indices = realloc(old,
3125                                   sizeof(int) * (drv->num_if_indices + 1));
3126         if (!drv->if_indices) {
3127                 if (!old)
3128                         drv->if_indices = drv->default_if_indices;
3129                 else
3130                         drv->if_indices = old;
3131                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3132                            "interfaces");
3133                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3134                 return;
3135         }
3136         drv->if_indices[drv->num_if_indices] = ifidx;
3137         drv->num_if_indices++;
3138 }
3139
3140
3141 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3142 {
3143         int i;
3144
3145         for (i = 0; i < drv->num_if_indices; i++) {
3146                 if (drv->if_indices[i] == ifidx) {
3147                         drv->if_indices[i] = 0;
3148                         break;
3149                 }
3150         }
3151 }
3152
3153
3154 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3155 {
3156         int i;
3157
3158         for (i = 0; i < drv->num_if_indices; i++)
3159                 if (drv->if_indices[i] == ifidx)
3160                         return 1;
3161
3162         return 0;
3163 }
3164
3165
3166 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3167                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3168                         size_t seq_len, const u8 *key, size_t key_len)
3169 {
3170         struct wpa_driver_nl80211_data *drv = priv;
3171         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3172                            set_tx, seq, seq_len, key, key_len);
3173 }
3174
3175
3176 static inline int min_int(int a, int b)
3177 {
3178         if (a < b)
3179                 return a;
3180         return b;
3181 }
3182
3183
3184 static int get_key_handler(struct nl_msg *msg, void *arg)
3185 {
3186         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3187         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3188
3189         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3190                   genlmsg_attrlen(gnlh, 0), NULL);
3191
3192         /*
3193          * TODO: validate the key index and mac address!
3194          * Otherwise, there's a race condition as soon as
3195          * the kernel starts sending key notifications.
3196          */
3197
3198         if (tb[NL80211_ATTR_KEY_SEQ])
3199                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3200                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3201         return NL_SKIP;
3202 }
3203
3204
3205 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3206                            int idx, u8 *seq)
3207 {
3208         struct wpa_driver_nl80211_data *drv = priv;
3209         struct nl_msg *msg;
3210
3211         msg = nlmsg_alloc();
3212         if (!msg)
3213                 return -ENOMEM;
3214
3215         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3216                     0, NL80211_CMD_GET_KEY, 0);
3217
3218         if (addr)
3219                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3220         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3221         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3222
3223         memset(seq, 0, 6);
3224
3225         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3226  nla_put_failure:
3227         return -ENOBUFS;
3228 }
3229
3230
3231 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3232                               int mode)
3233 {
3234         struct wpa_driver_nl80211_data *drv = priv;
3235         struct nl_msg *msg;
3236         u8 rates[NL80211_MAX_SUPP_RATES];
3237         u8 rates_len = 0;
3238         int i;
3239
3240         msg = nlmsg_alloc();
3241         if (!msg)
3242                 return -ENOMEM;
3243
3244         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3245                     NL80211_CMD_SET_BSS, 0);
3246
3247         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3248                 rates[rates_len++] = basic_rates[i] / 5;
3249
3250         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3251
3252         /* TODO: multi-BSS support */
3253         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3254
3255         return send_and_recv_msgs(drv, msg, NULL, NULL);
3256  nla_put_failure:
3257         return -ENOBUFS;
3258 }
3259
3260
3261 /* Set kernel driver on given frequency (MHz) */
3262 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3263 {
3264         struct wpa_driver_nl80211_data *drv = priv;
3265         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3266                                            freq->sec_channel_offset);
3267 }
3268
3269
3270 static int i802_set_rts(void *priv, int rts)
3271 {
3272 #ifdef NO_WEXT
3273         return -1;
3274 #else /* NO_WEXT */
3275         struct wpa_driver_nl80211_data *drv = priv;
3276         struct iwreq iwr;
3277
3278         memset(&iwr, 0, sizeof(iwr));
3279         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3280         iwr.u.rts.value = rts;
3281         iwr.u.rts.fixed = 1;
3282
3283         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3284                 perror("ioctl[SIOCSIWRTS]");
3285                 return -1;
3286         }
3287
3288         return 0;
3289 #endif /* NO_WEXT */
3290 }
3291
3292
3293 static int i802_set_frag(void *priv, int frag)
3294 {
3295 #ifdef NO_WEXT
3296         return -1;
3297 #else /* NO_WEXT */
3298         struct wpa_driver_nl80211_data *drv = priv;
3299         struct iwreq iwr;
3300
3301         memset(&iwr, 0, sizeof(iwr));
3302         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3303         iwr.u.frag.value = frag;
3304         iwr.u.frag.fixed = 1;
3305
3306         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3307                 perror("ioctl[SIOCSIWFRAG]");
3308                 return -1;
3309         }
3310
3311         return 0;
3312 #endif /* NO_WEXT */
3313 }
3314
3315
3316 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3317 {
3318 #ifdef NO_WEXT
3319         return -1;
3320 #else /* NO_WEXT */
3321         struct wpa_driver_nl80211_data *drv = priv;
3322         struct iwreq iwr;
3323
3324         memset(&iwr, 0, sizeof(iwr));
3325         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3326
3327         iwr.u.retry.value = short_retry;
3328         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3329         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3330                 perror("ioctl[SIOCSIWRETRY(short)]");
3331                 return -1;
3332         }
3333
3334         iwr.u.retry.value = long_retry;
3335         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3336         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3337                 perror("ioctl[SIOCSIWRETRY(long)]");
3338                 return -1;
3339         }
3340
3341         return 0;
3342 #endif /* NO_WEXT */
3343 }
3344
3345
3346 static int i802_flush(void *priv)
3347 {
3348         struct wpa_driver_nl80211_data *drv = priv;
3349         struct nl_msg *msg;
3350
3351         msg = nlmsg_alloc();
3352         if (!msg)
3353                 return -1;
3354
3355         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3356                     0, NL80211_CMD_DEL_STATION, 0);
3357
3358         /*
3359          * XXX: FIX! this needs to flush all VLANs too
3360          */
3361         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3362                     if_nametoindex(drv->ifname));
3363
3364         return send_and_recv_msgs(drv, msg, NULL, NULL);
3365  nla_put_failure:
3366         return -ENOBUFS;
3367 }
3368
3369
3370 static int get_sta_handler(struct nl_msg *msg, void *arg)
3371 {
3372         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3373         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3374         struct hostap_sta_driver_data *data = arg;
3375         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3376         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3377                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3378                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3379                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3380                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3381                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3382         };
3383
3384         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3385                   genlmsg_attrlen(gnlh, 0), NULL);
3386
3387         /*
3388          * TODO: validate the interface and mac address!
3389          * Otherwise, there's a race condition as soon as
3390          * the kernel starts sending station notifications.
3391          */
3392
3393         if (!tb[NL80211_ATTR_STA_INFO]) {
3394                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3395                 return NL_SKIP;
3396         }
3397         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3398                              tb[NL80211_ATTR_STA_INFO],
3399                              stats_policy)) {
3400                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3401                 return NL_SKIP;
3402         }
3403
3404         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3405                 data->inactive_msec =
3406                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3407         if (stats[NL80211_STA_INFO_RX_BYTES])
3408                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3409         if (stats[NL80211_STA_INFO_TX_BYTES])
3410                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3411         if (stats[NL80211_STA_INFO_RX_PACKETS])
3412                 data->rx_packets =
3413                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3414         if (stats[NL80211_STA_INFO_TX_PACKETS])
3415                 data->tx_packets =
3416                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3417
3418         return NL_SKIP;
3419 }
3420
3421 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3422                               const u8 *addr)
3423 {
3424         struct wpa_driver_nl80211_data *drv = priv;
3425         struct nl_msg *msg;
3426
3427         os_memset(data, 0, sizeof(*data));
3428         msg = nlmsg_alloc();
3429         if (!msg)
3430                 return -ENOMEM;
3431
3432         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3433                     0, NL80211_CMD_GET_STATION, 0);
3434
3435         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3436         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3437
3438         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3439  nla_put_failure:
3440         return -ENOBUFS;
3441 }
3442
3443
3444 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3445                            size_t data_len, int encrypt, const u8 *own_addr)
3446 {
3447         struct wpa_driver_nl80211_data *drv = priv;
3448         struct ieee80211_hdr *hdr;
3449         size_t len;
3450         u8 *pos;
3451         int res;
3452 #if 0 /* FIX */
3453         int qos = sta->flags & WLAN_STA_WME;
3454 #else
3455         int qos = 0;
3456 #endif
3457
3458         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3459                 data_len;
3460         hdr = os_zalloc(len);
3461         if (hdr == NULL) {
3462                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3463                        (unsigned long) len);
3464                 return -1;
3465         }
3466
3467         hdr->frame_control =
3468                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3469         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3470         if (encrypt)
3471                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3472 #if 0 /* To be enabled if qos determination is added above */
3473         if (qos) {
3474                 hdr->frame_control |=
3475                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3476         }
3477 #endif
3478
3479         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3480         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3481         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3482         pos = (u8 *) (hdr + 1);
3483
3484 #if 0 /* To be enabled if qos determination is added above */
3485         if (qos) {
3486                 /* add an empty QoS header if needed */
3487                 pos[0] = 0;
3488                 pos[1] = 0;
3489                 pos += 2;
3490         }
3491 #endif
3492
3493         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3494         pos += sizeof(rfc1042_header);
3495         WPA_PUT_BE16(pos, ETH_P_PAE);
3496         pos += 2;
3497         memcpy(pos, data, data_len);
3498
3499         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3500         if (res < 0) {
3501                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3502                            "failed: %d (%s)",
3503                            (unsigned long) len, errno, strerror(errno));
3504         }
3505         free(hdr);
3506
3507         return res;
3508 }
3509
3510
3511 static int i802_sta_add(const char *ifname, void *priv,
3512                         struct hostapd_sta_add_params *params)
3513 {
3514         struct wpa_driver_nl80211_data *drv = priv;
3515         struct nl_msg *msg;
3516         int ret = -ENOBUFS;
3517
3518         msg = nlmsg_alloc();
3519         if (!msg)
3520                 return -ENOMEM;
3521
3522         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3523                     0, NL80211_CMD_NEW_STATION, 0);
3524
3525         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3526                     if_nametoindex(drv->ifname));
3527         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3528         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3529         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3530                 params->supp_rates);
3531         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3532                     params->listen_interval);
3533
3534 #ifdef CONFIG_IEEE80211N
3535         if (params->ht_capabilities) {
3536                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3537                         params->ht_capabilities->length,
3538                         &params->ht_capabilities->data);
3539         }
3540 #endif /* CONFIG_IEEE80211N */
3541
3542         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3543         if (ret)
3544                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3545                            "result: %d (%s)", ret, strerror(-ret));
3546         if (ret == -EEXIST)
3547                 ret = 0;
3548  nla_put_failure:
3549         return ret;
3550 }
3551
3552
3553 static int i802_sta_remove(void *priv, const u8 *addr)
3554 {
3555         struct wpa_driver_nl80211_data *drv = priv;
3556         struct nl_msg *msg;
3557         int ret;
3558
3559         msg = nlmsg_alloc();
3560         if (!msg)
3561                 return -ENOMEM;
3562
3563         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3564                     0, NL80211_CMD_DEL_STATION, 0);
3565
3566         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3567                     if_nametoindex(drv->ifname));
3568         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3569
3570         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3571         if (ret == -ENOENT)
3572                 return 0;
3573         return ret;
3574  nla_put_failure:
3575         return -ENOBUFS;
3576 }
3577
3578
3579 static int i802_sta_set_flags(void *priv, const u8 *addr,
3580                               int total_flags, int flags_or, int flags_and)
3581 {
3582         struct wpa_driver_nl80211_data *drv = priv;
3583         struct nl_msg *msg, *flags = NULL;
3584
3585         msg = nlmsg_alloc();
3586         if (!msg)
3587                 return -ENOMEM;
3588
3589         flags = nlmsg_alloc();
3590         if (!flags) {
3591                 nlmsg_free(msg);
3592                 return -ENOMEM;
3593         }
3594
3595         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3596                     0, NL80211_CMD_SET_STATION, 0);
3597
3598         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3599                     if_nametoindex(drv->ifname));
3600         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3601
3602         if (total_flags & WLAN_STA_AUTHORIZED)
3603                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3604
3605         if (total_flags & WLAN_STA_WMM)
3606                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3607
3608         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3609                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3610
3611         if (total_flags & WLAN_STA_MFP)
3612                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3613
3614         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3615                 goto nla_put_failure;
3616
3617         nlmsg_free(flags);
3618
3619         return send_and_recv_msgs(drv, msg, NULL, NULL);
3620  nla_put_failure:
3621         nlmsg_free(flags);
3622         return -ENOBUFS;
3623 }
3624
3625
3626 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3627                                     int cw_min, int cw_max, int burst_time)
3628 {
3629         struct wpa_driver_nl80211_data *drv = priv;
3630         struct nl_msg *msg;
3631         struct nlattr *txq, *params;
3632
3633         msg = nlmsg_alloc();
3634         if (!msg)
3635                 return -1;
3636
3637         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3638                     0, NL80211_CMD_SET_WIPHY, 0);
3639
3640         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3641
3642         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3643         if (!txq)
3644                 goto nla_put_failure;
3645
3646         /* We are only sending parameters for a single TXQ at a time */
3647         params = nla_nest_start(msg, 1);
3648         if (!params)
3649                 goto nla_put_failure;
3650
3651         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3652         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3653          * 32 usec, so need to convert the value here. */
3654         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3655         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3656         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3657         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3658
3659         nla_nest_end(msg, params);
3660
3661         nla_nest_end(msg, txq);
3662
3663         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3664                 return 0;
3665  nla_put_failure:
3666         return -1;
3667 }
3668
3669
3670 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3671 {
3672         struct wpa_driver_nl80211_data *drv = priv;
3673         int ifidx;
3674         struct i802_bss *bss;
3675
3676         bss = os_zalloc(sizeof(*bss));
3677         if (bss == NULL)
3678                 return -1;
3679         bss->ifindex = if_nametoindex(ifname);
3680
3681         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3682         if (ifidx < 0) {
3683                 os_free(bss);
3684                 return -1;
3685         }
3686         if (hostapd_set_iface_flags(priv, ifname, 1)) {
3687                 nl80211_remove_iface(priv, ifidx);
3688                 os_free(bss);
3689                 return -1;
3690         }
3691         bss->next = drv->bss.next;
3692         drv->bss.next = bss;
3693         return 0;
3694 }
3695
3696
3697 static int i802_bss_remove(void *priv, const char *ifname)
3698 {
3699         struct wpa_driver_nl80211_data *drv = priv;
3700         struct i802_bss *bss, *prev;
3701         int ifindex = if_nametoindex(ifname);
3702         nl80211_remove_iface(priv, ifindex);
3703         prev = &drv->bss;
3704         bss = drv->bss.next;
3705         while (bss) {
3706                 if (ifindex == bss->ifindex) {
3707                         prev->next = bss->next;
3708                         os_free(bss);
3709                         break;
3710                 }
3711                 prev = bss;
3712                 bss = bss->next;
3713         }
3714         return 0;
3715 }
3716
3717
3718 static int i802_set_beacon(const char *iface, void *priv,
3719                            const u8 *head, size_t head_len,
3720                            const u8 *tail, size_t tail_len, int dtim_period)
3721 {
3722         return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3723                                                    head, head_len,
3724                                                    tail, tail_len,
3725                                                    dtim_period);
3726 }
3727
3728
3729 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3730 {
3731         struct nl_msg *msg;
3732
3733         msg = nlmsg_alloc();
3734         if (!msg)
3735                 return -ENOMEM;
3736
3737         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3738                     0, NL80211_CMD_DEL_BEACON, 0);
3739         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3740
3741         return send_and_recv_msgs(drv, msg, NULL, NULL);
3742  nla_put_failure:
3743         return -ENOBUFS;
3744 }
3745
3746
3747 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3748 {
3749         struct wpa_driver_nl80211_data *drv = priv;
3750         struct nl_msg *msg;
3751
3752         msg = nlmsg_alloc();
3753         if (!msg)
3754                 return -ENOMEM;
3755
3756         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3757                     NL80211_CMD_SET_BSS, 0);
3758
3759         if (cts >= 0)
3760                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3761         if (preamble >= 0)
3762                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3763         if (slot >= 0)
3764                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3765
3766         /* TODO: multi-BSS support */
3767         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3768
3769         return send_and_recv_msgs(drv, msg, NULL, NULL);
3770  nla_put_failure:
3771         return -ENOBUFS;
3772 }
3773
3774
3775 static int i802_set_cts_protect(void *priv, int value)
3776 {
3777         return i802_set_bss(priv, value, -1, -1);
3778 }
3779
3780
3781 static int i802_set_preamble(void *priv, int value)
3782 {
3783         return i802_set_bss(priv, -1, value, -1);
3784 }
3785
3786
3787 static int i802_set_short_slot_time(void *priv, int value)
3788 {
3789         return i802_set_bss(priv, -1, -1, value);
3790 }
3791
3792
3793 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3794 {
3795         switch (type) {
3796         case HOSTAPD_IF_VLAN:
3797                 return NL80211_IFTYPE_AP_VLAN;
3798         }
3799         return -1;
3800 }
3801
3802
3803 static int i802_if_add(const char *iface, void *priv,
3804                        enum hostapd_driver_if_type type, char *ifname,
3805                        const u8 *addr)
3806 {
3807         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3808                 return -1;
3809         return 0;
3810 }
3811
3812
3813 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3814                           char *ifname, const u8 *addr)
3815 {
3816         /* unused at the moment */
3817         return -1;
3818 }
3819
3820
3821 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3822                           const char *ifname, const u8 *addr)
3823 {
3824         nl80211_remove_iface(priv, if_nametoindex(ifname));
3825         return 0;
3826 }
3827
3828
3829 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3830                              const char *ifname, int vlan_id)
3831 {
3832         struct wpa_driver_nl80211_data *drv = priv;
3833         struct nl_msg *msg;
3834
3835         msg = nlmsg_alloc();
3836         if (!msg)
3837                 return -ENOMEM;
3838
3839         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3840                     0, NL80211_CMD_SET_STATION, 0);
3841
3842         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3843                     if_nametoindex(drv->ifname));
3844         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3845         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3846                     if_nametoindex(ifname));
3847
3848         return send_and_recv_msgs(drv, msg, NULL, NULL);
3849  nla_put_failure:
3850         return -ENOBUFS;
3851 }
3852
3853
3854 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3855 {
3856         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3857         struct sockaddr_ll lladdr;
3858         unsigned char buf[3000];
3859         int len;
3860         socklen_t fromlen = sizeof(lladdr);
3861
3862         len = recvfrom(sock, buf, sizeof(buf), 0,
3863                        (struct sockaddr *)&lladdr, &fromlen);
3864         if (len < 0) {
3865                 perror("recv");
3866                 return;
3867         }
3868
3869         if (have_ifidx(drv, lladdr.sll_ifindex)) {
3870                 struct hostapd_data *hapd;
3871                 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3872                 if (!hapd)
3873                         return;
3874                 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3875         }
3876 }
3877
3878
3879 static int i802_get_inact_sec(void *priv, const u8 *addr)
3880 {
3881         struct hostap_sta_driver_data data;
3882         int ret;
3883
3884         data.inactive_msec = (unsigned long) -1;
3885         ret = i802_read_sta_data(priv, &data, addr);
3886         if (ret || data.inactive_msec == (unsigned long) -1)
3887                 return -1;
3888         return data.inactive_msec / 1000;
3889 }
3890
3891
3892 static int i802_sta_clear_stats(void *priv, const u8 *addr)
3893 {
3894 #if 0
3895         /* TODO */
3896 #endif
3897         return 0;
3898 }
3899
3900
3901 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
3902 {
3903         struct wpa_driver_nl80211_data *drv = priv;
3904         struct ieee80211_mgmt mgmt;
3905
3906         memset(&mgmt, 0, sizeof(mgmt));
3907         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3908                                           WLAN_FC_STYPE_DEAUTH);
3909         memcpy(mgmt.da, addr, ETH_ALEN);
3910         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
3911         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
3912         mgmt.u.deauth.reason_code = host_to_le16(reason);
3913         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3914                                             IEEE80211_HDRLEN +
3915                                             sizeof(mgmt.u.deauth));
3916 }
3917
3918
3919 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
3920 {
3921         struct wpa_driver_nl80211_data *drv = priv;
3922         struct ieee80211_mgmt mgmt;
3923
3924         memset(&mgmt, 0, sizeof(mgmt));
3925         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3926                                           WLAN_FC_STYPE_DISASSOC);
3927         memcpy(mgmt.da, addr, ETH_ALEN);
3928         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
3929         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
3930         mgmt.u.disassoc.reason_code = host_to_le16(reason);
3931         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3932                                             IEEE80211_HDRLEN +
3933                                             sizeof(mgmt.u.disassoc));
3934 }
3935
3936
3937 static void *i802_init(struct hostapd_data *hapd,
3938                        struct wpa_init_params *params)
3939 {
3940         struct wpa_driver_nl80211_data *drv;
3941         size_t i;
3942
3943         drv = wpa_driver_nl80211_init(hapd, params->ifname);
3944         if (drv == NULL)
3945                 return NULL;
3946
3947         drv->hapd = hapd;
3948         drv->bss.ifindex = drv->ifindex;
3949
3950         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
3951         drv->if_indices = drv->default_if_indices;
3952         for (i = 0; i < params->num_bridge; i++) {
3953                 if (params->bridge[i])
3954                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
3955         }
3956
3957         /* start listening for EAPOL on the default AP interface */
3958         add_ifidx(drv, drv->ifindex);
3959
3960         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
3961                 goto failed;
3962
3963         if (params->bssid && set_ifhwaddr(drv, drv->ifname, params->bssid))
3964                 goto failed;
3965
3966         /* Initialise a monitor interface */
3967         if (nl80211_create_monitor_interface(drv))
3968                 goto failed;
3969
3970         if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
3971                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
3972                            "into AP mode", drv->ifname);
3973                 goto failed;
3974         }
3975
3976         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3977                 goto failed;
3978
3979         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
3980         if (drv->eapol_sock < 0) {
3981                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
3982                 goto failed;
3983         }
3984
3985         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
3986         {
3987                 printf("Could not register read socket for eapol\n");
3988                 goto failed;
3989         }
3990
3991         if (get_ifhwaddr(drv, drv->ifname, drv->hapd->own_addr))
3992                 goto failed;
3993
3994         return drv;
3995
3996 failed:
3997         if (drv->monitor_ifidx >= 0)
3998                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3999         if (drv->ioctl_sock >= 0)
4000                 close(drv->ioctl_sock);
4001
4002         genl_family_put(drv->nl80211);
4003         nl_cache_free(drv->nl_cache);
4004         nl_handle_destroy(drv->nl_handle);
4005         nl_cb_put(drv->nl_cb);
4006
4007         os_free(drv);
4008         return NULL;
4009 }
4010
4011
4012 static void i802_deinit(void *priv)
4013 {
4014         wpa_driver_nl80211_deinit(priv);
4015 }
4016
4017 #endif /* HOSTAPD */
4018
4019
4020 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4021         .name = "nl80211",
4022         .desc = "Linux nl80211/cfg80211",
4023         .get_bssid = wpa_driver_nl80211_get_bssid,
4024         .get_ssid = wpa_driver_nl80211_get_ssid,
4025         .set_key = wpa_driver_nl80211_set_key,
4026         .scan2 = wpa_driver_nl80211_scan,
4027         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4028         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4029         .disassociate = wpa_driver_nl80211_disassociate,
4030         .authenticate = wpa_driver_nl80211_authenticate,
4031         .associate = wpa_driver_nl80211_associate,
4032         .init = wpa_driver_nl80211_init,
4033         .deinit = wpa_driver_nl80211_deinit,
4034         .get_capa = wpa_driver_nl80211_get_capa,
4035         .set_operstate = wpa_driver_nl80211_set_operstate,
4036         .set_country = wpa_driver_nl80211_set_country,
4037         .set_mode = wpa_driver_nl80211_set_mode,
4038 #ifdef CONFIG_AP
4039         .set_beacon = wpa_driver_nl80211_set_beacon,
4040 #endif /* CONFIG_AP */
4041 #if defined(CONFIG_AP) || defined(HOSTAPD)
4042         .send_mlme = wpa_driver_nl80211_send_mlme,
4043         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4044         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4045 #endif /* CONFIG_AP || HOSTAPD */
4046 #ifdef HOSTAPD
4047         .hapd_init = i802_init,
4048         .hapd_deinit = i802_deinit,
4049         .hapd_set_key = i802_set_key,
4050         .get_seqnum = i802_get_seqnum,
4051         .flush = i802_flush,
4052         .read_sta_data = i802_read_sta_data,
4053         .hapd_send_eapol = i802_send_eapol,
4054         .sta_set_flags = i802_sta_set_flags,
4055         .sta_deauth = i802_sta_deauth,
4056         .sta_disassoc = i802_sta_disassoc,
4057         .sta_remove = i802_sta_remove,
4058         .sta_add = i802_sta_add,
4059         .get_inact_sec = i802_get_inact_sec,
4060         .sta_clear_stats = i802_sta_clear_stats,
4061         .set_freq = i802_set_freq,
4062         .set_rts = i802_set_rts,
4063         .set_frag = i802_set_frag,
4064         .set_retry = i802_set_retry,
4065         .set_rate_sets = i802_set_rate_sets,
4066         .hapd_set_beacon = i802_set_beacon,
4067         .set_cts_protect = i802_set_cts_protect,
4068         .set_preamble = i802_set_preamble,
4069         .set_short_slot_time = i802_set_short_slot_time,
4070         .set_tx_queue_params = i802_set_tx_queue_params,
4071         .bss_add = i802_bss_add,
4072         .bss_remove = i802_bss_remove,
4073         .if_add = i802_if_add,
4074         .if_update = i802_if_update,
4075         .if_remove = i802_if_remove,
4076         .set_sta_vlan = i802_set_sta_vlan,
4077 #endif /* HOSTAPD */
4078 };