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
  42 #include "../../hostapd/hostapd_defs.h"
  43 #include "../../hostapd/sta_flags.h"
  44 #endif /* CONFIG_AP || HOSTAPD */
  45
  46 #ifdef HOSTAPD
  47 #include "ieee802_11_common.h"
  48 #endif /* HOSTAPD */
  49
  50 #ifdef CONFIG_LIBNL20
  51 /* libnl 2.0 compatibility code */
  52 #define nl_handle nl_sock
  53 #define nl_handle_alloc_cb nl_socket_alloc_cb
  54 #define nl_handle_destroy nl_socket_free
  55 #endif /* CONFIG_LIBNL20 */
  56
  57
  58 #ifndef IFF_LOWER_UP
  59 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  60 #endif
  61 #ifndef IFF_DORMANT
  62 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  63 #endif
  64
  65 #ifndef IF_OPER_DORMANT
  66 #define IF_OPER_DORMANT 5
  67 #endif
  68 #ifndef IF_OPER_UP
  69 #define IF_OPER_UP 6
  70 #endif
  71
  72 struct i802_bss {
  73         struct i802_bss *next;
  74         int ifindex;
  75         unsigned int beacon_set:1;
  76 };
  77
  78 struct wpa_driver_nl80211_data {
  79         void *ctx;
  80         int link_event_sock;
  81         int ioctl_sock; /* socket for ioctl() use */
  82         char ifname[IFNAMSIZ + 1];
  83         int ifindex;
  84         int if_removed;
  85         struct wpa_driver_capa capa;
  86         int has_capability;
  87
  88         int operstate;
  89
  90         int scan_complete_events;
  91
  92         struct nl_handle *nl_handle;
  93         struct nl_handle *nl_handle_event;
  94         struct nl_cache *nl_cache;
  95         struct nl_cache *nl_cache_event;
  96         struct nl_cb *nl_cb;
  97         struct genl_family *nl80211;
  98
  99         u8 bssid[ETH_ALEN];
 100         int associated;
 101         u8 ssid[32];
 102         size_t ssid_len;
 103         int nlmode;
 104         int ap_scan_as_station;
 105
 106         int beacon_int;
 107         int monitor_sock;
 108         int monitor_ifidx;
 109
 110 #ifdef CONFIG_AP
 111         unsigned int beacon_set:1;
 112 #endif /* CONFIG_AP */
 113
 114 #ifdef HOSTAPD
 115         int eapol_sock; /* socket for EAPOL frames */
 116
 117         int default_if_indices[16];
 118         int *if_indices;
 119         int num_if_indices;
 120
 121         struct i802_bss bss;
 122
 123         int last_freq;
 124         int last_freq_ht;
 125 #endif /* HOSTAPD */
 126 };
 127
 128
 129 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 130                                             void *timeout_ctx);
 131 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 132 static int
 133 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 134
 135 #if defined(CONFIG_AP) || defined(HOSTAPD)
 136 static void nl80211_remove_monitor_interface(
 137         struct wpa_driver_nl80211_data *drv);
 138 #endif /* CONFIG_AP || HOSTAPD */
 139
 140 #ifdef CONFIG_AP
 141 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 142                                  int ifidx);
 143 #endif /* CONFIG_AP */
 144
 145 #ifdef HOSTAPD
 146 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 147 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 148 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 149                                  int ifindex);
 150 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 151                                  int ifidx);
 152 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 153 #endif /* HOSTAPD */
 154
 155
 156 /* nl80211 code */
 157 static int ack_handler(struct nl_msg *msg, void *arg)
 158 {
 159         int *err = arg;
 160         *err = 0;
 161         return NL_STOP;
 162 }
 163
 164 static int finish_handler(struct nl_msg *msg, void *arg)
 165 {
 166         int *ret = arg;
 167         *ret = 0;
 168         return NL_SKIP;
 169 }
 170
 171 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 172                          void *arg)
 173 {
 174         int *ret = arg;
 175         *ret = err->error;
 176         return NL_SKIP;
 177 }
 178
 179
 180 static int no_seq_check(struct nl_msg *msg, void *arg)
 181 {
 182         return NL_OK;
 183 }
 184
 185
 186 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 187                               struct nl_msg *msg,
 188                               int (*valid_handler)(struct nl_msg *, void *),
 189                               void *valid_data)
 190 {
 191         struct nl_cb *cb;
 192         int err = -ENOMEM;
 193
 194         cb = nl_cb_clone(drv->nl_cb);
 195         if (!cb)
 196                 goto out;
 197
 198         err = nl_send_auto_complete(drv->nl_handle, msg);
 199         if (err < 0)
 200                 goto out;
 201
 202         err = 1;
 203
 204         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 205         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 206         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 207
 208         if (valid_handler)
 209                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 210                           valid_handler, valid_data);
 211
 212         while (err > 0)
 213                 nl_recvmsgs(drv->nl_handle, cb);
 214  out:
 215         nl_cb_put(cb);
 216         nlmsg_free(msg);
 217         return err;
 218 }
 219
 220
 221 struct family_data {
 222         const char *group;
 223         int id;
 224 };
 225
 226
 227 static int family_handler(struct nl_msg *msg, void *arg)
 228 {
 229         struct family_data *res = arg;
 230         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 231         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 232         struct nlattr *mcgrp;
 233         int i;
 234
 235         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 236                   genlmsg_attrlen(gnlh, 0), NULL);
 237         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 238                 return NL_SKIP;
 239
 240         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 241                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 242                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 243                           nla_len(mcgrp), NULL);
 244                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 245                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 246                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 247                                res->group,
 248                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 249                         continue;
 250                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 251                 break;
 252         };
 253
 254         return NL_SKIP;
 255 }
 256
 257
 258 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 259                                const char *family, const char *group)
 260 {
 261         struct nl_msg *msg;
 262         int ret = -1;
 263         struct family_data res = { group, -ENOENT };
 264
 265         msg = nlmsg_alloc();
 266         if (!msg)
 267                 return -ENOMEM;
 268         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 269                     0, 0, CTRL_CMD_GETFAMILY, 0);
 270         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 271
 272         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 273         msg = NULL;
 274         if (ret == 0)
 275                 ret = res.id;
 276
 277 nla_put_failure:
 278         nlmsg_free(msg);
 279         return ret;
 280 }
 281
 282
 283 #ifdef HOSTAPD
 284 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 285                         const char *ifname, u8 *addr)
 286 {
 287         struct ifreq ifr;
 288
 289         os_memset(&ifr, 0, sizeof(ifr));
 290         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 291         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 292                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 293                            ifname, errno, strerror(errno));
 294                 return -1;
 295         }
 296
 297         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 298                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 299                            ifname, ifr.ifr_hwaddr.sa_family);
 300                 return -1;
 301         }
 302         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 303
 304         return 0;
 305 }
 306
 307
 308 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 309                         const char *ifname, const u8 *addr)
 310 {
 311         struct ifreq ifr;
 312
 313         os_memset(&ifr, 0, sizeof(ifr));
 314         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 315         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 316         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 317
 318         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 319                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 320                            ifname, errno, strerror(errno));
 321                 return -1;
 322         }
 323
 324         return 0;
 325 }
 326 #endif /* HOSTAPD */
 327
 328
 329 #ifndef HOSTAPD
 330
 331 static int wpa_driver_nl80211_send_oper_ifla(
 332         struct wpa_driver_nl80211_data *drv,
 333         int linkmode, int operstate)
 334 {
 335         struct {
 336                 struct nlmsghdr hdr;
 337                 struct ifinfomsg ifinfo;
 338                 char opts[16];
 339         } req;
 340         struct rtattr *rta;
 341         static int nl_seq;
 342         ssize_t ret;
 343
 344         os_memset(&req, 0, sizeof(req));
 345
 346         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 347         req.hdr.nlmsg_type = RTM_SETLINK;
 348         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 349         req.hdr.nlmsg_seq = ++nl_seq;
 350         req.hdr.nlmsg_pid = 0;
 351
 352         req.ifinfo.ifi_family = AF_UNSPEC;
 353         req.ifinfo.ifi_type = 0;
 354         req.ifinfo.ifi_index = drv->ifindex;
 355         req.ifinfo.ifi_flags = 0;
 356         req.ifinfo.ifi_change = 0;
 357
 358         if (linkmode != -1) {
 359                 rta = aliasing_hide_typecast(
 360                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
 361                         struct rtattr);
 362                 rta->rta_type = IFLA_LINKMODE;
 363                 rta->rta_len = RTA_LENGTH(sizeof(char));
 364                 *((char *) RTA_DATA(rta)) = linkmode;
 365                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 366                         RTA_LENGTH(sizeof(char));
 367         }
 368         if (operstate != -1) {
 369                 rta = (struct rtattr *)
 370                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 371                 rta->rta_type = IFLA_OPERSTATE;
 372                 rta->rta_len = RTA_LENGTH(sizeof(char));
 373                 *((char *) RTA_DATA(rta)) = operstate;
 374                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 375                         RTA_LENGTH(sizeof(char));
 376         }
 377
 378         wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
 379                    linkmode, operstate);
 380
 381         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 382         if (ret < 0) {
 383                 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
 384                            " %s (assume operstate is not supported)",
 385                            strerror(errno));
 386         }
 387
 388         return ret < 0 ? -1 : 0;
 389 }
 390
 391
 392 #ifndef NO_WEXT
 393 static int wpa_driver_nl80211_set_auth_param(
 394         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 395 {
 396         struct iwreq iwr;
 397         int ret = 0;
 398
 399         os_memset(&iwr, 0, sizeof(iwr));
 400         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 401         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 402         iwr.u.param.value = value;
 403
 404         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 405                 if (errno != EOPNOTSUPP) {
 406                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 407                                    "value 0x%x) failed: %s)",
 408                                    idx, value, strerror(errno));
 409                 }
 410                 ret = errno == EOPNOTSUPP ? -2 : -1;
 411         }
 412
 413         return ret;
 414 }
 415 #endif /* NO_WEXT */
 416
 417
 418 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 419 {
 420         struct wpa_driver_nl80211_data *drv = priv;
 421         if (!drv->associated)
 422                 return -1;
 423         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 424         return 0;
 425 }
 426
 427
 428 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 429 {
 430         struct wpa_driver_nl80211_data *drv = priv;
 431         if (!drv->associated)
 432                 return -1;
 433         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 434         return drv->ssid_len;
 435 }
 436
 437
 438 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 439                                           void *ctx, char *buf, size_t len,
 440                                           int del)
 441 {
 442         union wpa_event_data event;
 443
 444         os_memset(&event, 0, sizeof(event));
 445         if (len > sizeof(event.interface_status.ifname))
 446                 len = sizeof(event.interface_status.ifname) - 1;
 447         os_memcpy(event.interface_status.ifname, buf, len);
 448         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 449                 EVENT_INTERFACE_ADDED;
 450
 451         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 452                    del ? "DEL" : "NEW",
 453                    event.interface_status.ifname,
 454                    del ? "removed" : "added");
 455
 456         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 457                 if (del)
 458                         drv->if_removed = 1;
 459                 else
 460                         drv->if_removed = 0;
 461         }
 462
 463         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 464 }
 465
 466
 467 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 468                                          struct nlmsghdr *h)
 469 {
 470         struct ifinfomsg *ifi;
 471         int attrlen, _nlmsg_len, rta_len;
 472         struct rtattr *attr;
 473
 474         ifi = NLMSG_DATA(h);
 475
 476         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 477
 478         attrlen = h->nlmsg_len - _nlmsg_len;
 479         if (attrlen < 0)
 480                 return 0;
 481
 482         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 483
 484         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 485         while (RTA_OK(attr, attrlen)) {
 486                 if (attr->rta_type == IFLA_IFNAME) {
 487                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 488                             == 0)
 489                                 return 1;
 490                         else
 491                                 break;
 492                 }
 493                 attr = RTA_NEXT(attr, attrlen);
 494         }
 495
 496         return 0;
 497 }
 498
 499
 500 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 501                                           int ifindex, struct nlmsghdr *h)
 502 {
 503         if (drv->ifindex == ifindex)
 504                 return 1;
 505
 506         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 507                 drv->ifindex = if_nametoindex(drv->ifname);
 508                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 509                            "interface");
 510                 wpa_driver_nl80211_finish_drv_init(drv);
 511                 return 1;
 512         }
 513
 514         return 0;
 515 }
 516
 517
 518 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 519                                               void *ctx, struct nlmsghdr *h,
 520                                               size_t len)
 521 {
 522         struct ifinfomsg *ifi;
 523         int attrlen, _nlmsg_len, rta_len;
 524         struct rtattr * attr;
 525
 526         if (len < sizeof(*ifi))
 527                 return;
 528
 529         ifi = NLMSG_DATA(h);
 530
 531         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 532                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 533                            ifi->ifi_index);
 534                 return;
 535         }
 536
 537         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 538                    "(%s%s%s%s)",
 539                    drv->operstate, ifi->ifi_flags,
 540                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 541                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 542                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 543                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 544         /*
 545          * Some drivers send the association event before the operup event--in
 546          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 547          * fails. This will hit us when wpa_supplicant does not need to do
 548          * IEEE 802.1X authentication
 549          */
 550         if (drv->operstate == 1 &&
 551             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 552             !(ifi->ifi_flags & IFF_RUNNING))
 553                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 554
 555         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 556
 557         attrlen = h->nlmsg_len - _nlmsg_len;
 558         if (attrlen < 0)
 559                 return;
 560
 561         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 562
 563         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 564         while (RTA_OK(attr, attrlen)) {
 565                 if (attr->rta_type == IFLA_IFNAME) {
 566                         wpa_driver_nl80211_event_link(
 567                                 drv, ctx,
 568                                 ((char *) attr) + rta_len,
 569                                 attr->rta_len - rta_len, 0);
 570                 }
 571                 attr = RTA_NEXT(attr, attrlen);
 572         }
 573 }
 574
 575
 576 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 577                                               void *ctx, struct nlmsghdr *h,
 578                                               size_t len)
 579 {
 580         struct ifinfomsg *ifi;
 581         int attrlen, _nlmsg_len, rta_len;
 582         struct rtattr * attr;
 583
 584         if (len < sizeof(*ifi))
 585                 return;
 586
 587         ifi = NLMSG_DATA(h);
 588
 589         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 590
 591         attrlen = h->nlmsg_len - _nlmsg_len;
 592         if (attrlen < 0)
 593                 return;
 594
 595         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 596
 597         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 598         while (RTA_OK(attr, attrlen)) {
 599                 if (attr->rta_type == IFLA_IFNAME) {
 600                         wpa_driver_nl80211_event_link(
 601                                 drv, ctx,
 602                                 ((char *) attr) + rta_len,
 603                                 attr->rta_len - rta_len, 1);
 604                 }
 605                 attr = RTA_NEXT(attr, attrlen);
 606         }
 607 }
 608
 609
 610 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 611                                                   void *sock_ctx)
 612 {
 613         char buf[8192];
 614         int left;
 615         struct sockaddr_nl from;
 616         socklen_t fromlen;
 617         struct nlmsghdr *h;
 618         int max_events = 10;
 619
 620 try_again:
 621         fromlen = sizeof(from);
 622         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 623                         (struct sockaddr *) &from, &fromlen);
 624         if (left < 0) {
 625                 if (errno != EINTR && errno != EAGAIN)
 626                         perror("recvfrom(netlink)");
 627                 return;
 628         }
 629
 630         h = (struct nlmsghdr *) buf;
 631         while (left >= (int) sizeof(*h)) {
 632                 int len, plen;
 633
 634                 len = h->nlmsg_len;
 635                 plen = len - sizeof(*h);
 636                 if (len > left || plen < 0) {
 637                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 638                                    "len=%d left=%d plen=%d",
 639                                    len, left, plen);
 640                         break;
 641                 }
 642
 643                 switch (h->nlmsg_type) {
 644                 case RTM_NEWLINK:
 645                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 646                                                           h, plen);
 647                         break;
 648                 case RTM_DELLINK:
 649                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 650                                                           h, plen);
 651                         break;
 652                 }
 653
 654                 len = NLMSG_ALIGN(len);
 655                 left -= len;
 656                 h = (struct nlmsghdr *) ((char *) h + len);
 657         }
 658
 659         if (left > 0) {
 660                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 661                            "message", left);
 662         }
 663
 664         if (--max_events > 0) {
 665                 /*
 666                  * Try to receive all events in one eloop call in order to
 667                  * limit race condition on cases where AssocInfo event, Assoc
 668                  * event, and EAPOL frames are received more or less at the
 669                  * same time. We want to process the event messages first
 670                  * before starting EAPOL processing.
 671                  */
 672                 goto try_again;
 673         }
 674 }
 675
 676
 677 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 678                             const u8 *frame, size_t len)
 679 {
 680         const struct ieee80211_mgmt *mgmt;
 681         union wpa_event_data event;
 682
 683         mgmt = (const struct ieee80211_mgmt *) frame;
 684         if (len < 24 + sizeof(mgmt->u.auth)) {
 685                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 686                            "frame");
 687                 return;
 688         }
 689
 690         os_memset(&event, 0, sizeof(event));
 691         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 692         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 693         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 694         if (len > 24 + sizeof(mgmt->u.auth)) {
 695                 event.auth.ies = mgmt->u.auth.variable;
 696                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 697         }
 698
 699         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 700 }
 701
 702
 703 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 704                             const u8 *frame, size_t len)
 705 {
 706         const struct ieee80211_mgmt *mgmt;
 707         union wpa_event_data event;
 708         u16 status;
 709
 710         mgmt = (const struct ieee80211_mgmt *) frame;
 711         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 712                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 713                            "frame");
 714                 return;
 715         }
 716
 717         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 718         if (status != WLAN_STATUS_SUCCESS) {
 719                 os_memset(&event, 0, sizeof(event));
 720                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 721                         event.assoc_reject.resp_ies =
 722                                 (u8 *) mgmt->u.assoc_resp.variable;
 723                         event.assoc_reject.resp_ies_len =
 724                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 725                 }
 726                 event.assoc_reject.status_code = status;
 727
 728                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 729                 return;
 730         }
 731
 732         drv->associated = 1;
 733         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 734
 735         os_memset(&event, 0, sizeof(event));
 736         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 737                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 738                 event.assoc_info.resp_ies_len =
 739                         len - 24 - sizeof(mgmt->u.assoc_resp);
 740         }
 741
 742         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 743 }
 744
 745 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 746                                enum nl80211_commands cmd, struct nlattr *status,
 747                                struct nlattr *addr, struct nlattr *req_ie,
 748                                struct nlattr *resp_ie)
 749 {
 750         union wpa_event_data event;
 751
 752         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 753                 /*
 754                  * Avoid reporting two association events that would confuse
 755                  * the core code.
 756                  */
 757                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 758                            "when using userspace SME", cmd);
 759                 return;
 760         }
 761
 762         os_memset(&event, 0, sizeof(event));
 763         if (cmd == NL80211_CMD_CONNECT &&
 764             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 765                 if (resp_ie) {
 766                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 767                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 768                 }
 769                 event.assoc_reject.status_code = nla_get_u16(status);
 770                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 771                 return;
 772         }
 773
 774         drv->associated = 1;
 775         if (addr)
 776                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 777
 778         if (req_ie) {
 779                 event.assoc_info.req_ies = nla_data(req_ie);
 780                 event.assoc_info.req_ies_len = nla_len(req_ie);
 781         }
 782         if (resp_ie) {
 783                 event.assoc_info.resp_ies = nla_data(resp_ie);
 784                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 785         }
 786
 787         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 788 }
 789
 790 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 791                                enum nl80211_commands cmd, struct nlattr *addr)
 792 {
 793         union wpa_event_data event;
 794         enum wpa_event_type ev;
 795
 796         if (nla_len(addr) != ETH_ALEN)
 797                 return;
 798
 799         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 800                    cmd, MAC2STR((u8 *) nla_data(addr)));
 801
 802         if (cmd == NL80211_CMD_AUTHENTICATE)
 803                 ev = EVENT_AUTH_TIMED_OUT;
 804         else if (cmd == NL80211_CMD_ASSOCIATE)
 805                 ev = EVENT_ASSOC_TIMED_OUT;
 806         else
 807                 return;
 808
 809         os_memset(&event, 0, sizeof(event));
 810         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 811         wpa_supplicant_event(drv->ctx, ev, &event);
 812 }
 813
 814
 815 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 816                        enum nl80211_commands cmd, struct nlattr *frame,
 817                        struct nlattr *addr, struct nlattr *timed_out)
 818 {
 819         if (timed_out && addr) {
 820                 mlme_timeout_event(drv, cmd, addr);
 821                 return;
 822         }
 823
 824         if (frame == NULL) {
 825                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 826                            "data", cmd);
 827                 return;
 828         }
 829
 830         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 831         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 832                     nla_data(frame), nla_len(frame));
 833
 834         switch (cmd) {
 835         case NL80211_CMD_AUTHENTICATE:
 836                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 837                 break;
 838         case NL80211_CMD_ASSOCIATE:
 839                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 840                 break;
 841         case NL80211_CMD_DEAUTHENTICATE:
 842                 drv->associated = 0;
 843                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 844                 break;
 845         case NL80211_CMD_DISASSOCIATE:
 846                 drv->associated = 0;
 847                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 848                 break;
 849         default:
 850                 break;
 851         }
 852 }
 853
 854 #endif /* HOSTAPD */
 855
 856
 857 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 858                                            struct nlattr *tb[])
 859 {
 860         union wpa_event_data data;
 861
 862         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 863         os_memset(&data, 0, sizeof(data));
 864         if (tb[NL80211_ATTR_MAC]) {
 865                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 866                             nla_data(tb[NL80211_ATTR_MAC]),
 867                             nla_len(tb[NL80211_ATTR_MAC]));
 868                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 869         }
 870         if (tb[NL80211_ATTR_KEY_SEQ]) {
 871                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 872                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 873                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 874         }
 875         if (tb[NL80211_ATTR_KEY_TYPE]) {
 876                 enum nl80211_key_type key_type =
 877                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 878                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 879                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 880                         data.michael_mic_failure.unicast = 1;
 881         } else
 882                 data.michael_mic_failure.unicast = 1;
 883
 884         if (tb[NL80211_ATTR_KEY_IDX]) {
 885                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 886                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 887         }
 888
 889         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 890 }
 891
 892
 893 static int process_event(struct nl_msg *msg, void *arg)
 894 {
 895         struct wpa_driver_nl80211_data *drv = arg;
 896         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 897         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 898
 899         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 900                   genlmsg_attrlen(gnlh, 0), NULL);
 901
 902         if (tb[NL80211_ATTR_IFINDEX]) {
 903                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 904                 if (ifindex != drv->ifindex) {
 905                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 906                                    " for foreign interface (ifindex %d)",
 907                                    gnlh->cmd, ifindex);
 908                         return NL_SKIP;
 909                 }
 910         }
 911
 912         if (drv->ap_scan_as_station &&
 913             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 914              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 915                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 916                 drv->ap_scan_as_station = 0;
 917         }
 918
 919         switch (gnlh->cmd) {
 920         case NL80211_CMD_TRIGGER_SCAN:
 921                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 922                 break;
 923         case NL80211_CMD_NEW_SCAN_RESULTS:
 924                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 925                 drv->scan_complete_events = 1;
 926                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 927                                      drv->ctx);
 928                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 929                 break;
 930         case NL80211_CMD_SCAN_ABORTED:
 931                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 932                 /*
 933                  * Need to indicate that scan results are available in order
 934                  * not to make wpa_supplicant stop its scanning.
 935                  */
 936                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 937                                      drv->ctx);
 938                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 939                 break;
 940 #ifndef HOSTAPD
 941         case NL80211_CMD_AUTHENTICATE:
 942         case NL80211_CMD_ASSOCIATE:
 943         case NL80211_CMD_DEAUTHENTICATE:
 944         case NL80211_CMD_DISASSOCIATE:
 945                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 946                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
 947                 break;
 948         case NL80211_CMD_CONNECT:
 949         case NL80211_CMD_ROAM:
 950                 mlme_event_connect(drv, gnlh->cmd,
 951                                    tb[NL80211_ATTR_STATUS_CODE],
 952                                    tb[NL80211_ATTR_MAC],
 953                                    tb[NL80211_ATTR_REQ_IE],
 954                                    tb[NL80211_ATTR_RESP_IE]);
 955                 break;
 956         case NL80211_CMD_DISCONNECT:
 957                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 958                         /*
 959                          * Avoid reporting two disassociation events that could
 960                          * confuse the core code.
 961                          */
 962                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 963                                    "event when using userspace SME");
 964                         break;
 965                 }
 966                 drv->associated = 0;
 967                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 968                 break;
 969 #endif /* HOSTAPD */
 970         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 971                 mlme_event_michael_mic_failure(drv, tb);
 972                 break;
 973         default:
 974                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 975                            "(cmd=%d)", gnlh->cmd);
 976                 break;
 977         }
 978
 979         return NL_SKIP;
 980 }
 981
 982
 983 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 984                                              void *sock_ctx)
 985 {
 986         struct nl_cb *cb;
 987         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 988
 989         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 990
 991         cb = nl_cb_clone(drv->nl_cb);
 992         if (!cb)
 993                 return;
 994         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 995         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 996         nl_recvmsgs(drv->nl_handle_event, cb);
 997         nl_cb_put(cb);
 998 }
 999
1000
1001 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
1002                                    const char *ifname, int dev_up)
1003 {
1004         struct ifreq ifr;
1005
1006         if (drv->ioctl_sock < 0)
1007                 return -1;
1008
1009         os_memset(&ifr, 0, sizeof(ifr));
1010         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1011
1012         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
1013                 perror("ioctl[SIOCGIFFLAGS]");
1014                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
1015                            ifname);
1016                 return -1;
1017         }
1018
1019         if (dev_up) {
1020                 if (ifr.ifr_flags & IFF_UP)
1021                         return 0;
1022                 ifr.ifr_flags |= IFF_UP;
1023         } else {
1024                 if (!(ifr.ifr_flags & IFF_UP))
1025                         return 0;
1026                 ifr.ifr_flags &= ~IFF_UP;
1027         }
1028
1029         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
1030                 perror("ioctl[SIOCSIFFLAGS]");
1031                 return -1;
1032         }
1033
1034         return 0;
1035 }
1036
1037
1038 /**
1039  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1040  * @priv: driver_nl80211 private data
1041  * @alpha2_arg: country to which to switch to
1042  * Returns: 0 on success, -1 on failure
1043  *
1044  * This asks nl80211 to set the regulatory domain for given
1045  * country ISO / IEC alpha2.
1046  */
1047 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1048 {
1049         struct wpa_driver_nl80211_data *drv = priv;
1050         char alpha2[3];
1051         struct nl_msg *msg;
1052
1053         msg = nlmsg_alloc();
1054         if (!msg)
1055                 return -ENOMEM;
1056
1057         alpha2[0] = alpha2_arg[0];
1058         alpha2[1] = alpha2_arg[1];
1059         alpha2[2] = '\0';
1060
1061         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1062                     0, NL80211_CMD_REQ_SET_REG, 0);
1063
1064         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1065         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1066                 return -EINVAL;
1067         return 0;
1068 nla_put_failure:
1069         return -EINVAL;
1070 }
1071
1072
1073 #ifndef HOSTAPD
1074 struct wiphy_info_data {
1075         int max_scan_ssids;
1076         int ap_supported;
1077         int auth_supported;
1078         int connect_supported;
1079 };
1080
1081
1082 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1083 {
1084         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1085         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1086         struct wiphy_info_data *info = arg;
1087
1088         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1089                   genlmsg_attrlen(gnlh, 0), NULL);
1090
1091         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1092                 info->max_scan_ssids =
1093                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1094
1095         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1096                 struct nlattr *nl_mode;
1097                 int i;
1098                 nla_for_each_nested(nl_mode,
1099                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1100                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1101                                 info->ap_supported = 1;
1102                                 break;
1103                         }
1104                 }
1105         }
1106
1107         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1108                 struct nlattr *nl_cmd;
1109                 int i;
1110
1111                 nla_for_each_nested(nl_cmd,
1112                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1113                         u32 cmd = nla_get_u32(nl_cmd);
1114                         if (cmd == NL80211_CMD_AUTHENTICATE)
1115                                 info->auth_supported = 1;
1116                         else if (cmd == NL80211_CMD_CONNECT)
1117                                 info->connect_supported = 1;
1118                 }
1119         }
1120
1121         return NL_SKIP;
1122 }
1123
1124
1125 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1126                                        struct wiphy_info_data *info)
1127 {
1128         struct nl_msg *msg;
1129
1130         os_memset(info, 0, sizeof(*info));
1131         msg = nlmsg_alloc();
1132         if (!msg)
1133                 return -1;
1134
1135         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1136                     0, NL80211_CMD_GET_WIPHY, 0);
1137
1138         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1139
1140         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1141                 return 0;
1142         msg = NULL;
1143 nla_put_failure:
1144         nlmsg_free(msg);
1145         return -1;
1146 }
1147
1148
1149 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1150 {
1151         struct wiphy_info_data info;
1152         if (wpa_driver_nl80211_get_info(drv, &info))
1153                 return -1;
1154         drv->has_capability = 1;
1155         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1156         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1157                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1158                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1159                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1160         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1161                 WPA_DRIVER_CAPA_ENC_WEP104 |
1162                 WPA_DRIVER_CAPA_ENC_TKIP |
1163                 WPA_DRIVER_CAPA_ENC_CCMP;
1164
1165         drv->capa.max_scan_ssids = info.max_scan_ssids;
1166         if (info.ap_supported)
1167                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1168
1169         if (info.auth_supported)
1170                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1171         else if (!info.connect_supported) {
1172                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1173                            "authentication/association or connect commands");
1174                 return -1;
1175         }
1176
1177         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1178
1179         return 0;
1180 }
1181 #endif /* HOSTAPD */
1182
1183
1184 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1185                                       void *ctx)
1186 {
1187         int ret;
1188
1189         /* Initialize generic netlink and nl80211 */
1190
1191         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1192         if (drv->nl_cb == NULL) {
1193                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1194                            "callbacks");
1195                 goto err1;
1196         }
1197
1198         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1199         if (drv->nl_handle == NULL) {
1200                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1201                            "callbacks");
1202                 goto err2;
1203         }
1204
1205         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1206         if (drv->nl_handle_event == NULL) {
1207                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1208                            "callbacks (event)");
1209                 goto err2b;
1210         }
1211
1212         if (genl_connect(drv->nl_handle)) {
1213                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1214                            "netlink");
1215                 goto err3;
1216         }
1217
1218         if (genl_connect(drv->nl_handle_event)) {
1219                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1220                            "netlink (event)");
1221                 goto err3;
1222         }
1223
1224 #ifdef CONFIG_LIBNL20
1225         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1226                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1227                            "netlink cache");
1228                 goto err3;
1229         }
1230         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1231             0) {
1232                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1233                            "netlink cache (event)");
1234                 goto err3b;
1235         }
1236 #else /* CONFIG_LIBNL20 */
1237         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1238         if (drv->nl_cache == NULL) {
1239                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1240                            "netlink cache");
1241                 goto err3;
1242         }
1243         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1244         if (drv->nl_cache_event == NULL) {
1245                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1246                            "netlink cache (event)");
1247                 goto err3b;
1248         }
1249 #endif /* CONFIG_LIBNL20 */
1250
1251         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1252         if (drv->nl80211 == NULL) {
1253                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1254                            "found");
1255                 goto err4;
1256         }
1257
1258         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1259         if (ret >= 0)
1260                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1261         if (ret < 0) {
1262                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1263                            "membership for scan events: %d (%s)",
1264                            ret, strerror(-ret));
1265                 goto err4;
1266         }
1267
1268         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1269         if (ret >= 0)
1270                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1271         if (ret < 0) {
1272                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1273                            "membership for mlme events: %d (%s)",
1274                            ret, strerror(-ret));
1275                 goto err4;
1276         }
1277
1278         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1279                                  wpa_driver_nl80211_event_receive, drv, ctx);
1280
1281         return 0;
1282
1283 err4:
1284         nl_cache_free(drv->nl_cache_event);
1285 err3b:
1286         nl_cache_free(drv->nl_cache);
1287 err3:
1288         nl_handle_destroy(drv->nl_handle_event);
1289 err2b:
1290         nl_handle_destroy(drv->nl_handle);
1291 err2:
1292         nl_cb_put(drv->nl_cb);
1293 err1:
1294         return -1;
1295 }
1296
1297
1298 static int wpa_driver_nl80211_init_link_events(
1299         struct wpa_driver_nl80211_data *drv)
1300 {
1301 #ifdef HOSTAPD
1302         return 0;
1303 #else /* HOSTAPD */
1304         int s;
1305         struct sockaddr_nl local;
1306
1307         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1308         if (s < 0) {
1309                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1310                 return -1;
1311         }
1312
1313         os_memset(&local, 0, sizeof(local));
1314         local.nl_family = AF_NETLINK;
1315         local.nl_groups = RTMGRP_LINK;
1316         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1317                 perror("bind(netlink)");
1318                 close(s);
1319                 return -1;
1320         }
1321
1322         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1323                                  drv->ctx);
1324         drv->link_event_sock = s;
1325
1326         return 0;
1327 #endif /* HOSTAPD */
1328 }
1329
1330
1331 /**
1332  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1333  * @ctx: context to be used when calling wpa_supplicant functions,
1334  * e.g., wpa_supplicant_event()
1335  * @ifname: interface name, e.g., wlan0
1336  * Returns: Pointer to private data, %NULL on failure
1337  */
1338 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1339 {
1340         struct wpa_driver_nl80211_data *drv;
1341
1342         drv = os_zalloc(sizeof(*drv));
1343         if (drv == NULL)
1344                 return NULL;
1345         drv->ctx = ctx;
1346         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1347         drv->monitor_ifidx = -1;
1348         drv->monitor_sock = -1;
1349         drv->link_event_sock = -1;
1350         drv->ioctl_sock = -1;
1351
1352         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1353                 os_free(drv);
1354                 return NULL;
1355         }
1356
1357         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1358         if (drv->ioctl_sock < 0) {
1359                 perror("socket(PF_INET,SOCK_DGRAM)");
1360                 goto failed;
1361         }
1362
1363         if (wpa_driver_nl80211_init_link_events(drv) ||
1364             wpa_driver_nl80211_finish_drv_init(drv))
1365                 goto failed;
1366
1367         return drv;
1368
1369 failed:
1370         if (drv->link_event_sock >= 0) {
1371                 eloop_unregister_read_sock(drv->link_event_sock);
1372                 close(drv->link_event_sock);
1373         }
1374         if (drv->ioctl_sock >= 0)
1375                 close(drv->ioctl_sock);
1376
1377         genl_family_put(drv->nl80211);
1378         nl_cache_free(drv->nl_cache);
1379         nl_handle_destroy(drv->nl_handle);
1380         nl_cb_put(drv->nl_cb);
1381
1382         os_free(drv);
1383         return NULL;
1384 }
1385
1386
1387 static int
1388 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1389 {
1390         drv->ifindex = if_nametoindex(drv->ifname);
1391
1392 #ifndef HOSTAPD
1393         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1394                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1395                            "use managed mode");
1396         }
1397
1398         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1399                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1400                            "UP", drv->ifname);
1401                 return -1;
1402         }
1403
1404         if (wpa_driver_nl80211_capa(drv))
1405                 return -1;
1406
1407         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1408 #endif /* HOSTAPD */
1409
1410         return 0;
1411 }
1412
1413
1414 #ifdef HOSTAPD
1415 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1416 {
1417         struct i802_bss *bss, *prev;
1418         bss = drv->bss.next;
1419         while (bss) {
1420                 prev = bss;
1421                 bss = bss->next;
1422                 os_free(bss);
1423         }
1424 }
1425 #endif /* HOSTAPD */
1426
1427
1428 #if defined(CONFIG_AP) || defined(HOSTAPD)
1429 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1430 {
1431         struct nl_msg *msg;
1432
1433         msg = nlmsg_alloc();
1434         if (!msg)
1435                 return -ENOMEM;
1436
1437         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1438                     0, NL80211_CMD_DEL_BEACON, 0);
1439         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1440
1441         return send_and_recv_msgs(drv, msg, NULL, NULL);
1442  nla_put_failure:
1443         return -ENOBUFS;
1444 }
1445 #endif /* CONFIG_AP || HOSTAPD */
1446
1447
1448 /**
1449  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1450  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1451  *
1452  * Shut down driver interface and processing of driver events. Free
1453  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1454  */
1455 static void wpa_driver_nl80211_deinit(void *priv)
1456 {
1457         struct wpa_driver_nl80211_data *drv = priv;
1458
1459 #if defined(CONFIG_AP) || defined(HOSTAPD)
1460         nl80211_remove_monitor_interface(drv);
1461         if (drv->monitor_sock >= 0) {
1462                 eloop_unregister_read_sock(drv->monitor_sock);
1463                 close(drv->monitor_sock);
1464         }
1465
1466         if (drv->nlmode == NL80211_IFTYPE_AP)
1467                 wpa_driver_nl80211_del_beacon(drv);
1468 #endif /* CONFIG_AP || HOSTAPD */
1469
1470 #ifdef HOSTAPD
1471         if (drv->last_freq_ht) {
1472                 /* Clear HT flags from the driver */
1473                 struct hostapd_freq_params freq;
1474                 os_memset(&freq, 0, sizeof(freq));
1475                 freq.freq = drv->last_freq;
1476                 i802_set_freq(priv, &freq);
1477         }
1478
1479         if (drv->eapol_sock >= 0) {
1480                 eloop_unregister_read_sock(drv->eapol_sock);
1481                 close(drv->eapol_sock);
1482         }
1483
1484         if (drv->if_indices != drv->default_if_indices)
1485                 os_free(drv->if_indices);
1486
1487         wpa_driver_nl80211_free_bss(drv);
1488 #else /* HOSTAPD */
1489 #ifndef NO_WEXT
1490         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1491 #endif /* NO_WEXT */
1492
1493         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1494
1495         if (drv->link_event_sock >= 0) {
1496                 eloop_unregister_read_sock(drv->link_event_sock);
1497                 close(drv->link_event_sock);
1498         }
1499 #endif /* HOSTAPD */
1500
1501         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1502
1503         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1504         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1505
1506         if (drv->ioctl_sock >= 0)
1507                 close(drv->ioctl_sock);
1508
1509         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1510         genl_family_put(drv->nl80211);
1511         nl_cache_free(drv->nl_cache);
1512         nl_cache_free(drv->nl_cache_event);
1513         nl_handle_destroy(drv->nl_handle);
1514         nl_handle_destroy(drv->nl_handle_event);
1515         nl_cb_put(drv->nl_cb);
1516
1517         os_free(drv);
1518 }
1519
1520
1521 /**
1522  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1523  * @eloop_ctx: Driver private data
1524  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1525  *
1526  * This function can be used as registered timeout when starting a scan to
1527  * generate a scan completed event if the driver does not report this.
1528  */
1529 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1530 {
1531         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1532         if (drv->ap_scan_as_station) {
1533                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1534                 drv->ap_scan_as_station = 0;
1535         }
1536         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1537         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1538 }
1539
1540
1541 /**
1542  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1543  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1544  * @params: Scan parameters
1545  * Returns: 0 on success, -1 on failure
1546  */
1547 static int wpa_driver_nl80211_scan(void *priv,
1548                                    struct wpa_driver_scan_params *params)
1549 {
1550         struct wpa_driver_nl80211_data *drv = priv;
1551         int ret = 0, timeout;
1552         struct nl_msg *msg, *ssids, *freqs;
1553         size_t i;
1554
1555         msg = nlmsg_alloc();
1556         ssids = nlmsg_alloc();
1557         freqs = nlmsg_alloc();
1558         if (!msg || !ssids || !freqs) {
1559                 nlmsg_free(msg);
1560                 nlmsg_free(ssids);
1561                 nlmsg_free(freqs);
1562                 return -1;
1563         }
1564
1565         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1566                     NL80211_CMD_TRIGGER_SCAN, 0);
1567
1568         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1569
1570         for (i = 0; i < params->num_ssids; i++) {
1571                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1572                         params->ssids[i].ssid);
1573         }
1574         if (params->num_ssids)
1575                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1576
1577         if (params->extra_ies) {
1578                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1579                         params->extra_ies);
1580         }
1581
1582         if (params->freqs) {
1583                 for (i = 0; params->freqs[i]; i++)
1584                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1585                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1586         }
1587
1588         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1589         msg = NULL;
1590         if (ret) {
1591                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1592                            "(%s)", ret, strerror(-ret));
1593 #ifdef HOSTAPD
1594                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1595                         /*
1596                          * mac80211 does not allow scan requests in AP mode, so
1597                          * try to do this in station mode.
1598                          */
1599                         if (wpa_driver_nl80211_set_mode(drv,
1600                                                         IEEE80211_MODE_INFRA))
1601                                 goto nla_put_failure;
1602
1603                         if (wpa_driver_nl80211_scan(drv, params)) {
1604                                 wpa_driver_nl80211_set_mode(drv,
1605                                                             IEEE80211_MODE_AP);
1606                                 goto nla_put_failure;
1607                         }
1608
1609                         /* Restore AP mode when processing scan results */
1610                         drv->ap_scan_as_station = 1;
1611                         ret = 0;
1612                 } else
1613                         goto nla_put_failure;
1614 #else /* HOSTAPD */
1615                 goto nla_put_failure;
1616 #endif /* HOSTAPD */
1617         }
1618
1619         /* Not all drivers generate "scan completed" wireless event, so try to
1620          * read results after a timeout. */
1621         timeout = 10;
1622         if (drv->scan_complete_events) {
1623                 /*
1624                  * The driver seems to deliver events to notify when scan is
1625                  * complete, so use longer timeout to avoid race conditions
1626                  * with scanning and following association request.
1627                  */
1628                 timeout = 30;
1629         }
1630         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1631                    "seconds", ret, timeout);
1632         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1633         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1634                                drv, drv->ctx);
1635
1636 nla_put_failure:
1637         nlmsg_free(ssids);
1638         nlmsg_free(msg);
1639         nlmsg_free(freqs);
1640         return ret;
1641 }
1642
1643
1644 static int bss_info_handler(struct nl_msg *msg, void *arg)
1645 {
1646         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1647         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1648         struct nlattr *bss[NL80211_BSS_MAX + 1];
1649         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1650                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1651                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1652                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1653                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1654                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1655                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1656                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1657                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1658                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1659         };
1660         struct wpa_scan_results *res = arg;
1661         struct wpa_scan_res **tmp;
1662         struct wpa_scan_res *r;
1663         const u8 *ie;
1664         size_t ie_len;
1665
1666         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1667                   genlmsg_attrlen(gnlh, 0), NULL);
1668         if (!tb[NL80211_ATTR_BSS])
1669                 return NL_SKIP;
1670         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1671                              bss_policy))
1672                 return NL_SKIP;
1673         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1674                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1675                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1676         } else {
1677                 ie = NULL;
1678                 ie_len = 0;
1679         }
1680
1681         r = os_zalloc(sizeof(*r) + ie_len);
1682         if (r == NULL)
1683                 return NL_SKIP;
1684         if (bss[NL80211_BSS_BSSID])
1685                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1686                           ETH_ALEN);
1687         if (bss[NL80211_BSS_FREQUENCY])
1688                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1689         if (bss[NL80211_BSS_BEACON_INTERVAL])
1690                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1691         if (bss[NL80211_BSS_CAPABILITY])
1692                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1693         r->flags |= WPA_SCAN_NOISE_INVALID;
1694         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1695                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1696                 r->level /= 100; /* mBm to dBm */
1697                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1698         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1699                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1700                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1701         } else
1702                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1703         if (bss[NL80211_BSS_TSF])
1704                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1705         if (bss[NL80211_BSS_SEEN_MS_AGO])
1706                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1707         r->ie_len = ie_len;
1708         if (ie)
1709                 os_memcpy(r + 1, ie, ie_len);
1710
1711         tmp = os_realloc(res->res,
1712                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1713         if (tmp == NULL) {
1714                 os_free(r);
1715                 return NL_SKIP;
1716         }
1717         tmp[res->num++] = r;
1718         res->res = tmp;
1719
1720         return NL_SKIP;
1721 }
1722
1723
1724 /**
1725  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1726  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1727  * Returns: Scan results on success, -1 on failure
1728  */
1729 static struct wpa_scan_results *
1730 wpa_driver_nl80211_get_scan_results(void *priv)
1731 {
1732         struct wpa_driver_nl80211_data *drv = priv;
1733         struct nl_msg *msg;
1734         struct wpa_scan_results *res;
1735         int ret;
1736
1737         res = os_zalloc(sizeof(*res));
1738         if (res == NULL)
1739                 return 0;
1740         msg = nlmsg_alloc();
1741         if (!msg)
1742                 goto nla_put_failure;
1743
1744         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1745                     NL80211_CMD_GET_SCAN, 0);
1746         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1747
1748         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1749         msg = NULL;
1750         if (ret == 0) {
1751                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1752                            (unsigned long) res->num);
1753                 return res;
1754         }
1755         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1756                    "(%s)", ret, strerror(-ret));
1757 nla_put_failure:
1758         nlmsg_free(msg);
1759         wpa_scan_results_free(res);
1760         return NULL;
1761 }
1762
1763
1764 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1765                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1766                        const u8 *seq, size_t seq_len,
1767                        const u8 *key, size_t key_len)
1768 {
1769         struct nl_msg *msg;
1770         int ret;
1771
1772         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1773                    "set_tx=%d seq_len=%lu key_len=%lu",
1774                    __func__, ifindex, alg, addr, key_idx, set_tx,
1775                    (unsigned long) seq_len, (unsigned long) key_len);
1776
1777         msg = nlmsg_alloc();
1778         if (!msg)
1779                 return -ENOMEM;
1780
1781         if (alg == WPA_ALG_NONE) {
1782                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1783                             0, NL80211_CMD_DEL_KEY, 0);
1784         } else {
1785                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1786                             0, NL80211_CMD_NEW_KEY, 0);
1787                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1788                 switch (alg) {
1789                 case WPA_ALG_WEP:
1790                         if (key_len == 5)
1791                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1792                                             WLAN_CIPHER_SUITE_WEP40);
1793                         else
1794                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1795                                             WLAN_CIPHER_SUITE_WEP104);
1796                         break;
1797                 case WPA_ALG_TKIP:
1798                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1799                                     WLAN_CIPHER_SUITE_TKIP);
1800                         break;
1801                 case WPA_ALG_CCMP:
1802                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1803                                     WLAN_CIPHER_SUITE_CCMP);
1804                         break;
1805                 case WPA_ALG_IGTK:
1806                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1807                                     WLAN_CIPHER_SUITE_AES_CMAC);
1808                         break;
1809                 default:
1810                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1811                                    "algorithm %d", __func__, alg);
1812                         nlmsg_free(msg);
1813                         return -1;
1814                 }
1815         }
1816
1817         if (seq && seq_len)
1818                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1819
1820         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1821         {
1822                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1823                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1824         }
1825         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1826         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1827
1828         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1829         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1830                 ret = 0;
1831         if (ret)
1832                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1833                            ret, strerror(-ret));
1834
1835         /*
1836          * If we failed or don't need to set the default TX key (below),
1837          * we're done here.
1838          */
1839         if (ret || !set_tx || alg == WPA_ALG_NONE)
1840                 return ret;
1841 #ifdef HOSTAPD /* FIX: is this needed? */
1842         if (addr)
1843                 return ret;
1844 #endif /* HOSTAPD */
1845
1846         msg = nlmsg_alloc();
1847         if (!msg)
1848                 return -ENOMEM;
1849
1850         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1851                     0, NL80211_CMD_SET_KEY, 0);
1852         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1853         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1854         if (alg == WPA_ALG_IGTK)
1855                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1856         else
1857                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1858
1859         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1860         if (ret == -ENOENT)
1861                 ret = 0;
1862         if (ret)
1863                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1864                            "err=%d %s)", ret, strerror(-ret));
1865         return ret;
1866
1867 nla_put_failure:
1868         return -ENOBUFS;
1869 }
1870
1871
1872 #ifndef HOSTAPD
1873 static int nl_add_key(struct nl_msg *msg, wpa_alg alg,
1874                       int key_idx, int defkey,
1875                       const u8 *seq, size_t seq_len,
1876                       const u8 *key, size_t key_len)
1877 {
1878         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1879         if (!key_attr)
1880                 return -1;
1881
1882         if (defkey && alg == WPA_ALG_IGTK)
1883                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1884         else if (defkey)
1885                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1886
1887         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1888
1889         switch (alg) {
1890         case WPA_ALG_WEP:
1891                 if (key_len == 5)
1892                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1893                                     WLAN_CIPHER_SUITE_WEP40);
1894                 else
1895                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1896                                     WLAN_CIPHER_SUITE_WEP104);
1897                 break;
1898         case WPA_ALG_TKIP:
1899                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1900                 break;
1901         case WPA_ALG_CCMP:
1902                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1903                 break;
1904         case WPA_ALG_IGTK:
1905                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1906                             WLAN_CIPHER_SUITE_AES_CMAC);
1907                 break;
1908         default:
1909                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1910                            "algorithm %d", __func__, alg);
1911                 return -1;
1912         }
1913
1914         if (seq && seq_len)
1915                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1916
1917         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1918
1919         nla_nest_end(msg, key_attr);
1920
1921         return 0;
1922  nla_put_failure:
1923         return -1;
1924 }
1925
1926
1927 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1928                                  struct nl_msg *msg)
1929 {
1930         int i, privacy = 0;
1931         struct nlattr *nl_keys, *nl_key;
1932
1933         for (i = 0; i < 4; i++) {
1934                 if (!params->wep_key[i])
1935                         continue;
1936                 privacy = 1;
1937                 break;
1938         }
1939         if (!privacy)
1940                 return 0;
1941
1942         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1943
1944         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1945         if (!nl_keys)
1946                 goto nla_put_failure;
1947
1948         for (i = 0; i < 4; i++) {
1949                 if (!params->wep_key[i])
1950                         continue;
1951
1952                 nl_key = nla_nest_start(msg, i);
1953                 if (!nl_key)
1954                         goto nla_put_failure;
1955
1956                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1957                         params->wep_key[i]);
1958                 if (params->wep_key_len[i] == 5)
1959                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1960                                     WLAN_CIPHER_SUITE_WEP40);
1961                 else
1962                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1963                                     WLAN_CIPHER_SUITE_WEP104);
1964
1965                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1966
1967                 if (i == params->wep_tx_keyidx)
1968                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1969
1970                 nla_nest_end(msg, nl_key);
1971         }
1972         nla_nest_end(msg, nl_keys);
1973
1974         return 0;
1975
1976 nla_put_failure:
1977         return -ENOBUFS;
1978 }
1979
1980
1981 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1982                                       const u8 *addr, int key_idx,
1983                                       int set_tx, const u8 *seq,
1984                                       size_t seq_len,
1985                                       const u8 *key, size_t key_len)
1986 {
1987         struct wpa_driver_nl80211_data *drv = priv;
1988         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1989                            seq_len, key, key_len);
1990 }
1991
1992
1993 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1994                                    const u8 *addr, int cmd, u16 reason_code)
1995 {
1996         int ret = -1;
1997         struct nl_msg *msg;
1998
1999         msg = nlmsg_alloc();
2000         if (!msg)
2001                 return -1;
2002
2003         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2004
2005         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2006         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2007         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2008
2009         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2010         msg = NULL;
2011         if (ret) {
2012                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2013                            "(%s)", ret, strerror(-ret));
2014                 goto nla_put_failure;
2015         }
2016         ret = 0;
2017
2018 nla_put_failure:
2019         nlmsg_free(msg);
2020         return ret;
2021 }
2022
2023
2024 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2025                                          const u8 *addr, int reason_code)
2026 {
2027         wpa_printf(MSG_DEBUG, "%s", __func__);
2028         drv->associated = 0;
2029         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2030                                        reason_code);
2031 }
2032
2033
2034 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2035                                              int reason_code)
2036 {
2037         struct wpa_driver_nl80211_data *drv = priv;
2038         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2039                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2040         wpa_printf(MSG_DEBUG, "%s", __func__);
2041         drv->associated = 0;
2042         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2043                                        reason_code);
2044 }
2045
2046
2047 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2048                                            int reason_code)
2049 {
2050         struct wpa_driver_nl80211_data *drv = priv;
2051         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2052                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2053         wpa_printf(MSG_DEBUG, "%s", __func__);
2054         drv->associated = 0;
2055         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2056                                        reason_code);
2057 }
2058
2059
2060 static int wpa_driver_nl80211_authenticate(
2061         void *priv, struct wpa_driver_auth_params *params)
2062 {
2063         struct wpa_driver_nl80211_data *drv = priv;
2064         int ret = -1, i;
2065         struct nl_msg *msg;
2066         enum nl80211_auth_type type;
2067         int count = 0;
2068
2069         drv->associated = 0;
2070
2071 retry:
2072         msg = nlmsg_alloc();
2073         if (!msg)
2074                 return -1;
2075
2076         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2077                    drv->ifindex);
2078
2079         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2080                     NL80211_CMD_AUTHENTICATE, 0);
2081
2082         for (i = 0; i < 4; i++) {
2083                 if (!params->wep_key[i])
2084                         continue;
2085                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
2086                                            i == params->wep_tx_keyidx, NULL, 0,
2087                                            params->wep_key[i],
2088                                            params->wep_key_len[i]);
2089                 if (params->wep_tx_keyidx != i)
2090                         continue;
2091                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2092                                params->wep_key[i], params->wep_key_len[i])) {
2093                         nlmsg_free(msg);
2094                         return -1;
2095                 }
2096         }
2097
2098         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2099         if (params->bssid) {
2100                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2101                            MAC2STR(params->bssid));
2102                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2103         }
2104         if (params->freq) {
2105                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2106                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2107         }
2108         if (params->ssid) {
2109                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2110                                   params->ssid, params->ssid_len);
2111                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2112                         params->ssid);
2113         }
2114         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2115         if (params->ie)
2116                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2117         /*
2118          * TODO: if multiple auth_alg options enabled, try them one by one if
2119          * the AP rejects authentication due to unknown auth alg
2120          */
2121         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2122                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2123         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2124                 type = NL80211_AUTHTYPE_SHARED_KEY;
2125         else if (params->auth_alg & AUTH_ALG_LEAP)
2126                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2127         else if (params->auth_alg & AUTH_ALG_FT)
2128                 type = NL80211_AUTHTYPE_FT;
2129         else
2130                 goto nla_put_failure;
2131         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2132         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2133
2134         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2135         msg = NULL;
2136         if (ret) {
2137                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2138                            "(%s)", ret, strerror(-ret));
2139                 count++;
2140                 if (ret == -EALREADY && count == 1 && params->bssid) {
2141                         /*
2142                          * mac80211 does not currently accept new
2143                          * authentication if we are already authenticated. As a
2144                          * workaround, force deauthentication and try again.
2145                          */
2146                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2147                                    "after forced deauthentication");
2148                         wpa_driver_nl80211_deauthenticate(
2149                                 drv, params->bssid,
2150                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2151                         nlmsg_free(msg);
2152                         goto retry;
2153                 }
2154                 goto nla_put_failure;
2155         }
2156         ret = 0;
2157         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2158                    "successfully");
2159
2160 nla_put_failure:
2161         nlmsg_free(msg);
2162         return ret;
2163 }
2164
2165 #endif /* HOSTAPD */
2166
2167
2168 #if defined(CONFIG_AP) || defined(HOSTAPD)
2169
2170 struct phy_info_arg {
2171         u16 *num_modes;
2172         struct hostapd_hw_modes *modes;
2173 };
2174
2175 static int phy_info_handler(struct nl_msg *msg, void *arg)
2176 {
2177         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2178         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2179         struct phy_info_arg *phy_info = arg;
2180
2181         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2182
2183         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2184         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2185                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2186                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2187                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2188                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2189                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2190                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2191         };
2192
2193         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2194         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2195                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2196                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2197         };
2198
2199         struct nlattr *nl_band;
2200         struct nlattr *nl_freq;
2201         struct nlattr *nl_rate;
2202         int rem_band, rem_freq, rem_rate;
2203         struct hostapd_hw_modes *mode;
2204         int idx, mode_is_set;
2205
2206         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2207                   genlmsg_attrlen(gnlh, 0), NULL);
2208
2209         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2210                 return NL_SKIP;
2211
2212         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2213                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2214                 if (!mode)
2215                         return NL_SKIP;
2216                 phy_info->modes = mode;
2217
2218                 mode_is_set = 0;
2219
2220                 mode = &phy_info->modes[*(phy_info->num_modes)];
2221                 memset(mode, 0, sizeof(*mode));
2222                 *(phy_info->num_modes) += 1;
2223
2224                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2225                           nla_len(nl_band), NULL);
2226
2227                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2228                         mode->ht_capab = nla_get_u16(
2229                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2230                 }
2231
2232                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2233                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2234                         u8 *mcs;
2235                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2236                         os_memcpy(mode->mcs_set, mcs, 16);
2237                 }
2238
2239                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2240                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2241                                   nla_len(nl_freq), freq_policy);
2242                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2243                                 continue;
2244                         mode->num_channels++;
2245                 }
2246
2247                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
2248                 if (!mode->channels)
2249                         return NL_SKIP;
2250
2251                 idx = 0;
2252
2253                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2254                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2255                                   nla_len(nl_freq), freq_policy);
2256                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2257                                 continue;
2258
2259                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2260                         mode->channels[idx].flag = 0;
2261
2262                         if (!mode_is_set) {
2263                                 /* crude heuristic */
2264                                 if (mode->channels[idx].freq < 4000)
2265                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2266                                 else
2267                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2268                                 mode_is_set = 1;
2269                         }
2270
2271                         /* crude heuristic */
2272                         if (mode->channels[idx].freq < 4000)
2273                                 if (mode->channels[idx].freq == 2484)
2274                                         mode->channels[idx].chan = 14;
2275                                 else
2276                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2277                         else
2278                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2279
2280                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2281                                 mode->channels[idx].flag |=
2282                                         HOSTAPD_CHAN_DISABLED;
2283                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2284                                 mode->channels[idx].flag |=
2285                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2286                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2287                                 mode->channels[idx].flag |=
2288                                         HOSTAPD_CHAN_NO_IBSS;
2289                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2290                                 mode->channels[idx].flag |=
2291                                         HOSTAPD_CHAN_RADAR;
2292
2293                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2294                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2295                                 mode->channels[idx].max_tx_power =
2296                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2297
2298                         idx++;
2299                 }
2300
2301                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2302                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2303                                   nla_len(nl_rate), rate_policy);
2304                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2305                                 continue;
2306                         mode->num_rates++;
2307                 }
2308
2309                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
2310                 if (!mode->rates)
2311                         return NL_SKIP;
2312
2313                 idx = 0;
2314
2315                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2316                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2317                                   nla_len(nl_rate), rate_policy);
2318                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2319                                 continue;
2320                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2321
2322                         /* crude heuristic */
2323                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2324                             mode->rates[idx].rate > 200)
2325                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2326
2327                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2328                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
2329
2330                         idx++;
2331                 }
2332         }
2333
2334         return NL_SKIP;
2335 }
2336
2337 static struct hostapd_hw_modes *
2338 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2339 {
2340         u16 m;
2341         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2342         int i, mode11g_idx = -1;
2343
2344         /* If only 802.11g mode is included, use it to construct matching
2345          * 802.11b mode data. */
2346
2347         for (m = 0; m < *num_modes; m++) {
2348                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2349                         return modes; /* 802.11b already included */
2350                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2351                         mode11g_idx = m;
2352         }
2353
2354         if (mode11g_idx < 0)
2355                 return modes; /* 2.4 GHz band not supported at all */
2356
2357         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2358         if (nmodes == NULL)
2359                 return modes; /* Could not add 802.11b mode */
2360
2361         mode = &nmodes[*num_modes];
2362         os_memset(mode, 0, sizeof(*mode));
2363         (*num_modes)++;
2364         modes = nmodes;
2365
2366         mode->mode = HOSTAPD_MODE_IEEE80211B;
2367
2368         mode11g = &modes[mode11g_idx];
2369         mode->num_channels = mode11g->num_channels;
2370         mode->channels = os_malloc(mode11g->num_channels *
2371                                    sizeof(struct hostapd_channel_data));
2372         if (mode->channels == NULL) {
2373                 (*num_modes)--;
2374                 return modes; /* Could not add 802.11b mode */
2375         }
2376         os_memcpy(mode->channels, mode11g->channels,
2377                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2378
2379         mode->num_rates = 0;
2380         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2381         if (mode->rates == NULL) {
2382                 os_free(mode->channels);
2383                 (*num_modes)--;
2384                 return modes; /* Could not add 802.11b mode */
2385         }
2386
2387         for (i = 0; i < mode11g->num_rates; i++) {
2388                 if (mode11g->rates[i].rate > 110 ||
2389                     mode11g->rates[i].flags &
2390                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2391                         continue;
2392                 mode->rates[mode->num_rates] = mode11g->rates[i];
2393                 mode->num_rates++;
2394                 if (mode->num_rates == 4)
2395                         break;
2396         }
2397
2398         if (mode->num_rates == 0) {
2399                 os_free(mode->channels);
2400                 os_free(mode->rates);
2401                 (*num_modes)--;
2402                 return modes; /* No 802.11b rates */
2403         }
2404
2405         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2406                    "information");
2407
2408         return modes;
2409 }
2410
2411
2412 static struct hostapd_hw_modes *
2413 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2414 {
2415         struct wpa_driver_nl80211_data *drv = priv;
2416         struct nl_msg *msg;
2417         struct phy_info_arg result = {
2418                 .num_modes = num_modes,
2419                 .modes = NULL,
2420         };
2421
2422         *num_modes = 0;
2423         *flags = 0;
2424
2425         msg = nlmsg_alloc();
2426         if (!msg)
2427                 return NULL;
2428
2429         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2430                     0, NL80211_CMD_GET_WIPHY, 0);
2431
2432         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2433
2434         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2435                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2436  nla_put_failure:
2437         return NULL;
2438 }
2439
2440
2441 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2442                                          const void *data, size_t len,
2443                                          int encrypt)
2444 {
2445         __u8 rtap_hdr[] = {
2446                 0x00, 0x00, /* radiotap version */
2447                 0x0e, 0x00, /* radiotap length */
2448                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2449                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2450                 0x00,       /* padding */
2451                 0x00, 0x00, /* RX and TX flags to indicate that */
2452                 0x00, 0x00, /* this is the injected frame directly */
2453         };
2454         struct iovec iov[2] = {
2455                 {
2456                         .iov_base = &rtap_hdr,
2457                         .iov_len = sizeof(rtap_hdr),
2458                 },
2459                 {
2460                         .iov_base = (void *) data,
2461                         .iov_len = len,
2462                 }
2463         };
2464         struct msghdr msg = {
2465                 .msg_name = NULL,
2466                 .msg_namelen = 0,
2467                 .msg_iov = iov,
2468                 .msg_iovlen = 2,
2469                 .msg_control = NULL,
2470                 .msg_controllen = 0,
2471                 .msg_flags = 0,
2472         };
2473
2474         if (encrypt)
2475                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2476
2477         return sendmsg(drv->monitor_sock, &msg, 0);
2478 }
2479
2480
2481 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2482                                         size_t data_len)
2483 {
2484         struct wpa_driver_nl80211_data *drv = priv;
2485         struct ieee80211_mgmt *mgmt;
2486         int encrypt = 1;
2487         u16 fc;
2488
2489         mgmt = (struct ieee80211_mgmt *) data;
2490         fc = le_to_host16(mgmt->frame_control);
2491
2492         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2493             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2494                 /*
2495                  * Only one of the authentication frame types is encrypted.
2496                  * In order for static WEP encryption to work properly (i.e.,
2497                  * to not encrypt the frame), we need to tell mac80211 about
2498                  * the frames that must not be encrypted.
2499                  */
2500                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2501                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2502                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2503                         encrypt = 0;
2504         }
2505
2506         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2507 }
2508
2509
2510 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2511                                                const u8 *head, size_t head_len,
2512                                                const u8 *tail, size_t tail_len,
2513                                                int dtim_period)
2514 {
2515         struct wpa_driver_nl80211_data *drv = priv;
2516         struct nl_msg *msg;
2517         u8 cmd = NL80211_CMD_NEW_BEACON;
2518         int ret;
2519         int beacon_set;
2520 #ifdef HOSTAPD
2521         struct i802_bss *bss;
2522
2523         bss = get_bss(drv, ifindex);
2524         if (bss == NULL)
2525                 return -ENOENT;
2526         beacon_set = bss->beacon_set;
2527 #else /* HOSTAPD */
2528         beacon_set = drv->beacon_set;
2529 #endif /* HOSTAPD */
2530
2531         msg = nlmsg_alloc();
2532         if (!msg)
2533                 return -ENOMEM;
2534
2535         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2536                    beacon_set);
2537         if (beacon_set)
2538                 cmd = NL80211_CMD_SET_BEACON;
2539
2540         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2541                     0, cmd, 0);
2542         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2543         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2544         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2545         if (!drv->beacon_int)
2546                 drv->beacon_int = 100;
2547         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2548         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2549
2550         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2551         if (ret) {
2552                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2553                            ret, strerror(-ret));
2554         } else {
2555 #ifdef HOSTAPD
2556                 bss->beacon_set = 1;
2557 #else /* HOSTAPD */
2558                 drv->beacon_set = 1;
2559 #endif /* HOSTAPD */
2560         }
2561         return ret;
2562  nla_put_failure:
2563         return -ENOBUFS;
2564 }
2565
2566
2567 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2568 {
2569         struct wpa_driver_nl80211_data *drv = priv;
2570         struct nl_msg *msg;
2571
2572         drv->beacon_int = value;
2573
2574 #ifdef HOSTAPD
2575         if (!drv->bss.beacon_set)
2576                 return 0;
2577 #else /* HOSTAPD */
2578         if (!drv->beacon_set)
2579                 return 0;
2580 #endif /* HOSTAPD */
2581
2582         msg = nlmsg_alloc();
2583         if (!msg)
2584                 return -ENOMEM;
2585
2586         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2587         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2588                     0, NL80211_CMD_SET_BEACON, 0);
2589         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2590
2591         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2592
2593         return send_and_recv_msgs(drv, msg, NULL, NULL);
2594  nla_put_failure:
2595         return -ENOBUFS;
2596 }
2597
2598
2599 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2600                                        int freq, int ht_enabled,
2601                                        int sec_channel_offset)
2602 {
2603         struct nl_msg *msg;
2604         int ret;
2605
2606         msg = nlmsg_alloc();
2607         if (!msg)
2608                 return -1;
2609
2610         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2611                     NL80211_CMD_SET_WIPHY, 0);
2612
2613         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2614         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2615         if (ht_enabled) {
2616                 switch (sec_channel_offset) {
2617                 case -1:
2618                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2619                                     NL80211_CHAN_HT40MINUS);
2620                         break;
2621                 case 1:
2622                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2623                                     NL80211_CHAN_HT40PLUS);
2624                         break;
2625                 default:
2626                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2627                                     NL80211_CHAN_HT20);
2628                         break;
2629                 }
2630         }
2631
2632         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2633         if (ret == 0)
2634                 return 0;
2635         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2636                    "%d (%s)", freq, ret, strerror(-ret));
2637 nla_put_failure:
2638         return -1;
2639 }
2640
2641
2642 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2643                                       struct hostapd_sta_add_params *params)
2644 {
2645         struct wpa_driver_nl80211_data *drv = priv;
2646         struct nl_msg *msg;
2647         int ret = -ENOBUFS;
2648
2649         msg = nlmsg_alloc();
2650         if (!msg)
2651                 return -ENOMEM;
2652
2653         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2654                     0, NL80211_CMD_NEW_STATION, 0);
2655
2656         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2657         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2658         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2659         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2660                 params->supp_rates);
2661         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2662                     params->listen_interval);
2663
2664 #ifdef CONFIG_IEEE80211N
2665         if (params->ht_capabilities) {
2666                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2667                         params->ht_capabilities->length,
2668                         &params->ht_capabilities->data);
2669         }
2670 #endif /* CONFIG_IEEE80211N */
2671
2672         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2673         if (ret)
2674                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2675                            "result: %d (%s)", ret, strerror(-ret));
2676         if (ret == -EEXIST)
2677                 ret = 0;
2678  nla_put_failure:
2679         return ret;
2680 }
2681
2682
2683 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2684 {
2685         struct wpa_driver_nl80211_data *drv = priv;
2686         struct nl_msg *msg;
2687         int ret;
2688
2689         msg = nlmsg_alloc();
2690         if (!msg)
2691                 return -ENOMEM;
2692
2693         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2694                     0, NL80211_CMD_DEL_STATION, 0);
2695
2696         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2697                     if_nametoindex(drv->ifname));
2698         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2699
2700         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2701         if (ret == -ENOENT)
2702                 return 0;
2703         return ret;
2704  nla_put_failure:
2705         return -ENOBUFS;
2706 }
2707
2708 #endif /* CONFIG_AP || HOSTAPD */
2709
2710
2711 #ifdef CONFIG_AP
2712
2713 static int wpa_driver_nl80211_set_beacon(void *priv,
2714                                          const u8 *head, size_t head_len,
2715                                          const u8 *tail, size_t tail_len,
2716                                          int dtim_period)
2717 {
2718         struct wpa_driver_nl80211_data *drv = priv;
2719         return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2720                                                    head, head_len,
2721                                                    tail, tail_len,
2722                                                    dtim_period);
2723 }
2724
2725 #endif /* CONFIG_AP */
2726
2727 #if defined(CONFIG_AP) || defined(HOSTAPD)
2728
2729 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2730                                  int ifidx)
2731 {
2732         struct nl_msg *msg;
2733
2734 #ifdef HOSTAPD
2735         /* stop listening for EAPOL on this interface */
2736         del_ifidx(drv, ifidx);
2737 #endif /* HOSTAPD */
2738
2739         msg = nlmsg_alloc();
2740         if (!msg)
2741                 goto nla_put_failure;
2742
2743         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2744                     0, NL80211_CMD_DEL_INTERFACE, 0);
2745         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2746
2747         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2748                 return;
2749  nla_put_failure:
2750         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2751                    ifidx);
2752 }
2753
2754
2755 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2756                                      const char *ifname,
2757                                      enum nl80211_iftype iftype,
2758                                      const u8 *addr)
2759 {
2760         struct nl_msg *msg, *flags = NULL;
2761         int ifidx;
2762         int ret = -ENOBUFS;
2763
2764         msg = nlmsg_alloc();
2765         if (!msg)
2766                 return -1;
2767
2768         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2769                     0, NL80211_CMD_NEW_INTERFACE, 0);
2770         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2771         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2772         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2773
2774         if (iftype == NL80211_IFTYPE_MONITOR) {
2775                 int err;
2776
2777                 flags = nlmsg_alloc();
2778                 if (!flags)
2779                         goto nla_put_failure;
2780
2781                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2782
2783                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2784
2785                 nlmsg_free(flags);
2786
2787                 if (err)
2788                         goto nla_put_failure;
2789         }
2790
2791         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2792         if (ret) {
2793  nla_put_failure:
2794                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2795                            ifname, ret, strerror(-ret));
2796                 return ret;
2797         }
2798
2799         ifidx = if_nametoindex(ifname);
2800
2801         if (ifidx <= 0)
2802                 return -1;
2803
2804 #ifdef HOSTAPD
2805         /* start listening for EAPOL on this interface */
2806         add_ifidx(drv, ifidx);
2807
2808         if (addr && iftype == NL80211_IFTYPE_AP &&
2809             set_ifhwaddr(drv, ifname, addr)) {
2810                 nl80211_remove_iface(drv, ifidx);
2811                 return -1;
2812         }
2813 #endif /* HOSTAPD */
2814
2815         return ifidx;
2816 }
2817 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2818                                 const char *ifname, enum nl80211_iftype iftype,
2819                                 const u8 *addr)
2820 {
2821         int ret;
2822
2823         ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2824
2825         /* if error occured and interface exists already */
2826         if (ret == -ENFILE && if_nametoindex(ifname)) {
2827                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2828
2829                 /* Try to remove the interface that was already there. */
2830                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2831
2832                 /* Try to create the interface again */
2833                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2834         }
2835
2836         return ret;
2837 }
2838
2839 #endif /* CONFIG_AP || HOSTAPD */
2840
2841 #ifdef CONFIG_AP
2842
2843 void ap_tx_status(void *ctx, const u8 *addr,
2844                   const u8 *buf, size_t len, int ack);
2845 void ap_rx_from_unknown_sta(void *ctx, struct ieee80211_hdr *hdr, size_t len);
2846 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2847                 struct hostapd_frame_info *fi);
2848 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2849
2850 #endif /* CONFIG_AP */
2851
2852 #if defined(CONFIG_AP) || defined(HOSTAPD)
2853
2854 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2855 {
2856         struct ieee80211_hdr *hdr;
2857         u16 fc, type, stype;
2858
2859         hdr = (struct ieee80211_hdr *) buf;
2860         fc = le_to_host16(hdr->frame_control);
2861
2862         type = WLAN_FC_GET_TYPE(fc);
2863         stype = WLAN_FC_GET_STYPE(fc);
2864
2865         switch (type) {
2866         case WLAN_FC_TYPE_MGMT:
2867                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2868                            ok ? "ACK" : "fail");
2869 #ifdef HOSTAPD
2870                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2871 #else /* HOSTAPD */
2872                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2873 #endif /* HOSTAPD */
2874                 break;
2875         case WLAN_FC_TYPE_CTRL:
2876                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2877                            ok ? "ACK" : "fail");
2878                 break;
2879         case WLAN_FC_TYPE_DATA:
2880 #ifdef HOSTAPD
2881                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2882 #else /* HOSTAPD */
2883                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2884 #endif /* HOSTAPD */
2885                 break;
2886         default:
2887                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2888                            type);
2889                 break;
2890         }
2891 }
2892
2893
2894 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2895                              struct ieee80211_hdr *hdr, size_t len)
2896 {
2897 #ifdef HOSTAPD
2898         hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2899 #else /* HOSTAPD */
2900         ap_rx_from_unknown_sta(drv->ctx, hdr, len);
2901 #endif /* HOSTAPD */
2902 }
2903
2904
2905 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2906                          u8 *buf, size_t len,
2907                          struct hostapd_frame_info *hfi)
2908 {
2909         struct ieee80211_hdr *hdr;
2910         u16 fc, stype;
2911
2912         hdr = (struct ieee80211_hdr *) buf;
2913         fc = le_to_host16(hdr->frame_control);
2914         stype = WLAN_FC_GET_STYPE(fc);
2915
2916         switch (WLAN_FC_GET_TYPE(fc)) {
2917         case WLAN_FC_TYPE_MGMT:
2918                 if (stype != WLAN_FC_STYPE_BEACON &&
2919                     stype != WLAN_FC_STYPE_PROBE_REQ)
2920                         wpa_printf(MSG_MSGDUMP, "MGMT");
2921 #ifdef HOSTAPD
2922                 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2923 #else /* HOSTAPD */
2924                 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2925 #endif /* HOSTAPD */
2926                 break;
2927         case WLAN_FC_TYPE_CTRL:
2928                 /* can only get here with PS-Poll frames */
2929                 wpa_printf(MSG_DEBUG, "CTRL");
2930                 from_unknown_sta(drv, hdr, len);
2931                 break;
2932         case WLAN_FC_TYPE_DATA:
2933                 from_unknown_sta(drv, hdr, len);
2934                 break;
2935         }
2936 }
2937
2938
2939 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2940 {
2941         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2942         int len;
2943         unsigned char buf[3000];
2944         struct ieee80211_radiotap_iterator iter;
2945         int ret;
2946         struct hostapd_frame_info hfi;
2947         int injected = 0, failed = 0, rxflags = 0;
2948
2949         len = recv(sock, buf, sizeof(buf), 0);
2950         if (len < 0) {
2951                 perror("recv");
2952                 return;
2953         }
2954
2955         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2956                 printf("received invalid radiotap frame\n");
2957                 return;
2958         }
2959
2960         memset(&hfi, 0, sizeof(hfi));
2961
2962         while (1) {
2963                 ret = ieee80211_radiotap_iterator_next(&iter);
2964                 if (ret == -ENOENT)
2965                         break;
2966                 if (ret) {
2967                         printf("received invalid radiotap frame (%d)\n", ret);
2968                         return;
2969                 }
2970                 switch (iter.this_arg_index) {
2971                 case IEEE80211_RADIOTAP_FLAGS:
2972                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2973                                 len -= 4;
2974                         break;
2975                 case IEEE80211_RADIOTAP_RX_FLAGS:
2976                         rxflags = 1;
2977                         break;
2978                 case IEEE80211_RADIOTAP_TX_FLAGS:
2979                         injected = 1;
2980                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2981                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2982                         break;
2983                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2984                         break;
2985                 case IEEE80211_RADIOTAP_CHANNEL:
2986                         /* TODO convert from freq/flags to channel number
2987                         hfi.channel = XXX;
2988                         hfi.phytype = XXX;
2989                          */
2990                         break;
2991                 case IEEE80211_RADIOTAP_RATE:
2992                         hfi.datarate = *iter.this_arg * 5;
2993                         break;
2994                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2995                         hfi.ssi_signal = *iter.this_arg;
2996                         break;
2997                 }
2998         }
2999
3000         if (rxflags && injected)
3001                 return;
3002
3003         if (!injected)
3004                 handle_frame(drv, buf + iter.max_length,
3005                              len - iter.max_length, &hfi);
3006         else
3007                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3008                                    len - iter.max_length, !failed);
3009 }
3010
3011
3012 /*
3013  * we post-process the filter code later and rewrite
3014  * this to the offset to the last instruction
3015  */
3016 #define PASS    0xFF
3017 #define FAIL    0xFE
3018
3019 static struct sock_filter msock_filter_insns[] = {
3020         /*
3021          * do a little-endian load of the radiotap length field
3022          */
3023         /* load lower byte into A */
3024         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3025         /* put it into X (== index register) */
3026         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3027         /* load upper byte into A */
3028         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3029         /* left-shift it by 8 */
3030         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3031         /* or with X */
3032         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3033         /* put result into X */
3034         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3035
3036         /*
3037          * Allow management frames through, this also gives us those
3038          * management frames that we sent ourselves with status
3039          */
3040         /* load the lower byte of the IEEE 802.11 frame control field */
3041         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3042         /* mask off frame type and version */
3043         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3044         /* accept frame if it's both 0, fall through otherwise */
3045         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3046
3047         /*
3048          * TODO: add a bit to radiotap RX flags that indicates
3049          * that the sending station is not associated, then
3050          * add a filter here that filters on our DA and that flag
3051          * to allow us to deauth frames to that bad station.
3052          *
3053          * Not a regression -- we didn't do it before either.
3054          */
3055
3056 #if 0
3057         /*
3058          * drop non-data frames, WDS frames
3059          */
3060         /* load the lower byte of the frame control field */
3061         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3062         /* mask off QoS bit */
3063         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3064         /* drop non-data frames */
3065         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3066         /* load the upper byte of the frame control field */
3067         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3068         /* mask off toDS/fromDS */
3069         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3070         /* drop WDS frames */
3071         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
3072 #endif
3073
3074         /*
3075          * add header length to index
3076          */
3077         /* load the lower byte of the frame control field */
3078         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3079         /* mask off QoS bit */
3080         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3081         /* right shift it by 6 to give 0 or 2 */
3082         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3083         /* add data frame header length */
3084         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3085         /* add index, was start of 802.11 header */
3086         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3087         /* move to index, now start of LL header */
3088         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3089
3090         /*
3091          * Accept empty data frames, we use those for
3092          * polling activity.
3093          */
3094         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3095         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3096
3097         /*
3098          * Accept EAPOL frames
3099          */
3100         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3101         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3102         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3103         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3104
3105         /* keep these last two statements or change the code below */
3106         /* return 0 == "DROP" */
3107         BPF_STMT(BPF_RET | BPF_K, 0),
3108         /* return ~0 == "keep all" */
3109         BPF_STMT(BPF_RET | BPF_K, ~0),
3110 };
3111
3112 static struct sock_fprog msock_filter = {
3113         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3114         .filter = msock_filter_insns,
3115 };
3116
3117
3118 static int add_monitor_filter(int s)
3119 {
3120         int idx;
3121
3122         /* rewrite all PASS/FAIL jump offsets */
3123         for (idx = 0; idx < msock_filter.len; idx++) {
3124                 struct sock_filter *insn = &msock_filter_insns[idx];
3125
3126                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3127                         if (insn->code == (BPF_JMP|BPF_JA)) {
3128                                 if (insn->k == PASS)
3129                                         insn->k = msock_filter.len - idx - 2;
3130                                 else if (insn->k == FAIL)
3131                                         insn->k = msock_filter.len - idx - 3;
3132                         }
3133
3134                         if (insn->jt == PASS)
3135                                 insn->jt = msock_filter.len - idx - 2;
3136                         else if (insn->jt == FAIL)
3137                                 insn->jt = msock_filter.len - idx - 3;
3138
3139                         if (insn->jf == PASS)
3140                                 insn->jf = msock_filter.len - idx - 2;
3141                         else if (insn->jf == FAIL)
3142                                 insn->jf = msock_filter.len - idx - 3;
3143                 }
3144         }
3145
3146         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3147                        &msock_filter, sizeof(msock_filter))) {
3148                 perror("SO_ATTACH_FILTER");
3149                 return -1;
3150         }
3151
3152         return 0;
3153 }
3154
3155
3156 static void nl80211_remove_monitor_interface(
3157         struct wpa_driver_nl80211_data *drv)
3158 {
3159         if (drv->monitor_ifidx >= 0) {
3160                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3161                 drv->monitor_ifidx = -1;
3162         }
3163 }
3164
3165
3166 static int
3167 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3168 {
3169         char buf[IFNAMSIZ];
3170         struct sockaddr_ll ll;
3171         int optval;
3172         socklen_t optlen;
3173
3174         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3175         buf[IFNAMSIZ - 1] = '\0';
3176
3177         drv->monitor_ifidx =
3178                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
3179
3180         if (drv->monitor_ifidx < 0)
3181                 return -1;
3182
3183         if (hostapd_set_iface_flags(drv, buf, 1))
3184                 goto error;
3185
3186         memset(&ll, 0, sizeof(ll));
3187         ll.sll_family = AF_PACKET;
3188         ll.sll_ifindex = drv->monitor_ifidx;
3189         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3190         if (drv->monitor_sock < 0) {
3191                 perror("socket[PF_PACKET,SOCK_RAW]");
3192                 goto error;
3193         }
3194
3195         if (add_monitor_filter(drv->monitor_sock)) {
3196                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3197                            "interface; do filtering in user space");
3198                 /* This works, but will cost in performance. */
3199         }
3200
3201         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3202                 perror("monitor socket bind");
3203                 goto error;
3204         }
3205
3206         optlen = sizeof(optval);
3207         optval = 20;
3208         if (setsockopt
3209             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3210                 perror("Failed to set socket priority");
3211                 goto error;
3212         }
3213
3214         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3215                                      drv, NULL)) {
3216                 printf("Could not register monitor read socket\n");
3217                 goto error;
3218         }
3219
3220         return 0;
3221  error:
3222         nl80211_remove_monitor_interface(drv);
3223         return -1;
3224 }
3225
3226
3227 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3228
3229 static int wpa_driver_nl80211_hapd_send_eapol(
3230         void *priv, const u8 *addr, const u8 *data,
3231         size_t data_len, int encrypt, const u8 *own_addr)
3232 {
3233         struct wpa_driver_nl80211_data *drv = priv;
3234         struct ieee80211_hdr *hdr;
3235         size_t len;
3236         u8 *pos;
3237         int res;
3238 #if 0 /* FIX */
3239         int qos = sta->flags & WLAN_STA_WME;
3240 #else
3241         int qos = 0;
3242 #endif
3243
3244         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3245                 data_len;
3246         hdr = os_zalloc(len);
3247         if (hdr == NULL) {
3248                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3249                        (unsigned long) len);
3250                 return -1;
3251         }
3252
3253         hdr->frame_control =
3254                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3255         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3256         if (encrypt)
3257                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3258 #if 0 /* To be enabled if qos determination is added above */
3259         if (qos) {
3260                 hdr->frame_control |=
3261                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3262         }
3263 #endif
3264
3265         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3266         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3267         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3268         pos = (u8 *) (hdr + 1);
3269
3270 #if 0 /* To be enabled if qos determination is added above */
3271         if (qos) {
3272                 /* add an empty QoS header if needed */
3273                 pos[0] = 0;
3274                 pos[1] = 0;
3275                 pos += 2;
3276         }
3277 #endif
3278
3279         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3280         pos += sizeof(rfc1042_header);
3281         WPA_PUT_BE16(pos, ETH_P_PAE);
3282         pos += 2;
3283         memcpy(pos, data, data_len);
3284
3285         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3286         if (res < 0) {
3287                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3288                            "failed: %d (%s)",
3289                            (unsigned long) len, errno, strerror(errno));
3290         }
3291         free(hdr);
3292
3293         return res;
3294 }
3295
3296
3297 static u32 sta_flags_nl80211(int flags)
3298 {
3299         u32 f = 0;
3300
3301         if (flags & WLAN_STA_AUTHORIZED)
3302                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3303         if (flags & WLAN_STA_WMM)
3304                 f |= BIT(NL80211_STA_FLAG_WME);
3305         if (flags & WLAN_STA_SHORT_PREAMBLE)
3306                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3307         if (flags & WLAN_STA_MFP)
3308                 f |= BIT(NL80211_STA_FLAG_MFP);
3309
3310         return f;
3311 }
3312
3313
3314 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3315                                             int total_flags, int flags_or,
3316                                             int flags_and)
3317 {
3318         struct wpa_driver_nl80211_data *drv = priv;
3319         struct nl_msg *msg, *flags = NULL;
3320         struct nl80211_sta_flag_update upd;
3321
3322         msg = nlmsg_alloc();
3323         if (!msg)
3324                 return -ENOMEM;
3325
3326         flags = nlmsg_alloc();
3327         if (!flags) {
3328                 nlmsg_free(msg);
3329                 return -ENOMEM;
3330         }
3331
3332         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3333                     0, NL80211_CMD_SET_STATION, 0);
3334
3335         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3336                     if_nametoindex(drv->ifname));
3337         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3338
3339         /*
3340          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3341          * can be removed eventually.
3342          */
3343         if (total_flags & WLAN_STA_AUTHORIZED)
3344                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3345
3346         if (total_flags & WLAN_STA_WMM)
3347                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3348
3349         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3350                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3351
3352         if (total_flags & WLAN_STA_MFP)
3353                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3354
3355         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3356                 goto nla_put_failure;
3357
3358         os_memset(&upd, 0, sizeof(upd));
3359         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3360         upd.set = sta_flags_nl80211(flags_or);
3361         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3362
3363         nlmsg_free(flags);
3364
3365         return send_and_recv_msgs(drv, msg, NULL, NULL);
3366  nla_put_failure:
3367         nlmsg_free(flags);
3368         return -ENOBUFS;
3369 }
3370
3371 #endif /* CONFIG_AP || HOSTAPD */
3372
3373 #ifdef CONFIG_AP
3374
3375 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3376                                  struct wpa_driver_associate_params *params)
3377 {
3378         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3379             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3380                 nl80211_remove_monitor_interface(drv);
3381                 return -1;
3382         }
3383
3384         /* TODO: setup monitor interface (and add code somewhere to remove this
3385          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3386
3387         return 0;
3388 }
3389 #endif /* CONFIG_AP */
3390
3391
3392 #ifndef HOSTAPD
3393 static int wpa_driver_nl80211_connect(
3394         struct wpa_driver_nl80211_data *drv,
3395         struct wpa_driver_associate_params *params)
3396 {
3397         struct nl_msg *msg;
3398         enum nl80211_auth_type type;
3399         int ret = 0;
3400
3401         msg = nlmsg_alloc();
3402         if (!msg)
3403                 return -1;
3404
3405         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3406         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3407                     NL80211_CMD_CONNECT, 0);
3408
3409         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3410         if (params->bssid) {
3411                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3412                            MAC2STR(params->bssid));
3413                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3414         }
3415         if (params->freq) {
3416                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3417                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3418         }
3419         if (params->ssid) {
3420                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3421                                   params->ssid, params->ssid_len);
3422                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3423                         params->ssid);
3424                 if (params->ssid_len > sizeof(drv->ssid))
3425                         goto nla_put_failure;
3426                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3427                 drv->ssid_len = params->ssid_len;
3428         }
3429         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3430         if (params->wpa_ie)
3431                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3432                         params->wpa_ie);
3433
3434         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3435                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3436         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3437                 type = NL80211_AUTHTYPE_SHARED_KEY;
3438         else if (params->auth_alg & AUTH_ALG_LEAP)
3439                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3440         else if (params->auth_alg & AUTH_ALG_FT)
3441                 type = NL80211_AUTHTYPE_FT;
3442         else
3443                 goto nla_put_failure;
3444
3445         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3446         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3447
3448         if (params->wpa_ie && params->wpa_ie_len) {
3449                 enum nl80211_wpa_versions ver;
3450
3451                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3452                         ver = NL80211_WPA_VERSION_2;
3453                 else
3454                         ver = NL80211_WPA_VERSION_1;
3455
3456                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3457                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3458         }
3459
3460         if (params->pairwise_suite != CIPHER_NONE) {
3461                 int cipher = IW_AUTH_CIPHER_NONE;
3462
3463                 switch (params->pairwise_suite) {
3464                 case CIPHER_WEP40:
3465                         cipher = WLAN_CIPHER_SUITE_WEP40;
3466                         break;
3467                 case CIPHER_WEP104:
3468                         cipher = WLAN_CIPHER_SUITE_WEP104;
3469                         break;
3470                 case CIPHER_CCMP:
3471                         cipher = WLAN_CIPHER_SUITE_CCMP;
3472                         break;
3473                 case CIPHER_TKIP:
3474                 default:
3475                         cipher = WLAN_CIPHER_SUITE_TKIP;
3476                         break;
3477                 }
3478                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3479         }
3480
3481         if (params->group_suite != CIPHER_NONE) {
3482                 int cipher = IW_AUTH_CIPHER_NONE;
3483
3484                 switch (params->group_suite) {
3485                 case CIPHER_WEP40:
3486                         cipher = WLAN_CIPHER_SUITE_WEP40;
3487                         break;
3488                 case CIPHER_WEP104:
3489                         cipher = WLAN_CIPHER_SUITE_WEP104;
3490                         break;
3491                 case CIPHER_CCMP:
3492                         cipher = WLAN_CIPHER_SUITE_CCMP;
3493                         break;
3494                 case CIPHER_TKIP:
3495                 default:
3496                         cipher = WLAN_CIPHER_SUITE_TKIP;
3497                         break;
3498                 }
3499                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3500         }
3501
3502         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3503             params->key_mgmt_suite == KEY_MGMT_PSK) {
3504                 int mgmt = WLAN_AKM_SUITE_PSK;
3505
3506                 switch (params->key_mgmt_suite) {
3507                 case KEY_MGMT_802_1X:
3508                         mgmt = WLAN_AKM_SUITE_8021X;
3509                         break;
3510                 case KEY_MGMT_PSK:
3511                 default:
3512                         mgmt = WLAN_AKM_SUITE_PSK;
3513                         break;
3514                 }
3515                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3516         }
3517
3518         ret = nl80211_set_conn_keys(params, msg);
3519         if (ret)
3520                 goto nla_put_failure;
3521
3522         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3523         msg = NULL;
3524         if (ret) {
3525                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3526                            "(%s)", ret, strerror(-ret));
3527                 goto nla_put_failure;
3528         }
3529         ret = 0;
3530         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3531
3532 nla_put_failure:
3533         nlmsg_free(msg);
3534         return ret;
3535
3536 }
3537
3538
3539 static int wpa_driver_nl80211_associate(
3540         void *priv, struct wpa_driver_associate_params *params)
3541 {
3542         struct wpa_driver_nl80211_data *drv = priv;
3543         int ret = -1;
3544         struct nl_msg *msg;
3545
3546 #ifdef CONFIG_AP
3547         if (params->mode == 2)
3548                 return wpa_driver_nl80211_ap(drv, params);
3549 #endif /* CONFIG_AP */
3550
3551         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
3552                 return wpa_driver_nl80211_connect(drv, params);
3553
3554 #ifndef NO_WEXT
3555         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
3556                                           params->drop_unencrypted);
3557 #endif /* NO_WEXT */
3558
3559         drv->associated = 0;
3560
3561         msg = nlmsg_alloc();
3562         if (!msg)
3563                 return -1;
3564
3565         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3566                    drv->ifindex);
3567         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3568                     NL80211_CMD_ASSOCIATE, 0);
3569
3570         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3571         if (params->bssid) {
3572                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3573                            MAC2STR(params->bssid));
3574                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3575         }
3576         if (params->freq) {
3577                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3578                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3579         }
3580         if (params->ssid) {
3581                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3582                                   params->ssid, params->ssid_len);
3583                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3584                         params->ssid);
3585                 if (params->ssid_len > sizeof(drv->ssid))
3586                         goto nla_put_failure;
3587                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3588                 drv->ssid_len = params->ssid_len;
3589         }
3590         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3591         if (params->wpa_ie)
3592                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3593                         params->wpa_ie);
3594
3595 #ifdef CONFIG_IEEE80211W
3596         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3597                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3598 #endif /* CONFIG_IEEE80211W */
3599
3600         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3601
3602         if (params->prev_bssid) {
3603                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3604                            MAC2STR(params->prev_bssid));
3605                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3606                         params->prev_bssid);
3607         }
3608
3609         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3610         msg = NULL;
3611         if (ret) {
3612                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3613                            "(%s)", ret, strerror(-ret));
3614                 goto nla_put_failure;
3615         }
3616         ret = 0;
3617         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3618                    "successfully");
3619
3620 nla_put_failure:
3621         nlmsg_free(msg);
3622         return ret;
3623 }
3624 #endif /* HOSTAPD */
3625
3626
3627 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3628                             int ifindex, int mode)
3629 {
3630         struct nl_msg *msg;
3631         int ret = -ENOBUFS;
3632
3633         msg = nlmsg_alloc();
3634         if (!msg)
3635                 return -ENOMEM;
3636
3637         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3638                     0, NL80211_CMD_SET_INTERFACE, 0);
3639         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3640         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3641
3642         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3643         if (!ret)
3644                 return 0;
3645 nla_put_failure:
3646         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3647                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3648         return ret;
3649 }
3650
3651
3652 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3653 {
3654         struct wpa_driver_nl80211_data *drv = priv;
3655         int ret = -1;
3656         int nlmode;
3657
3658         switch (mode) {
3659         case 0:
3660                 nlmode = NL80211_IFTYPE_STATION;
3661                 break;
3662         case 1:
3663                 nlmode = NL80211_IFTYPE_ADHOC;
3664                 break;
3665         case 2:
3666                 nlmode = NL80211_IFTYPE_AP;
3667                 break;
3668         default:
3669                 return -1;
3670         }
3671
3672         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3673                 drv->nlmode = nlmode;
3674                 ret = 0;
3675                 goto done;
3676         }
3677
3678         if (nlmode == drv->nlmode) {
3679                 ret = 0;
3680                 goto done; /* Already in the requested mode */
3681         }
3682
3683         /* mac80211 doesn't allow mode changes while the device is up, so
3684          * take the device down, try to set the mode again, and bring the
3685          * device back up.
3686          */
3687         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3688                 /* Try to set the mode again while the interface is down */
3689                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3690                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3691                         ret = -1;
3692         }
3693
3694         if (!ret)
3695                 drv->nlmode = nlmode;
3696
3697 done:
3698 #if defined(CONFIG_AP) || defined(HOSTAPD)
3699         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3700                 /* Setup additional AP mode functionality if needed */
3701                 if (drv->monitor_ifidx < 0 &&
3702                     nl80211_create_monitor_interface(drv))
3703                         return -1;
3704         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3705                 /* Remove additional AP mode functionality */
3706                 nl80211_remove_monitor_interface(drv);
3707         }
3708 #endif /* CONFIG_AP || HOSTAPD */
3709
3710         return ret;
3711 }
3712
3713
3714 #ifndef HOSTAPD
3715
3716 static int wpa_driver_nl80211_get_capa(void *priv,
3717                                        struct wpa_driver_capa *capa)
3718 {
3719         struct wpa_driver_nl80211_data *drv = priv;
3720         if (!drv->has_capability)
3721                 return -1;
3722         os_memcpy(capa, &drv->capa, sizeof(*capa));
3723         return 0;
3724 }
3725
3726
3727 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3728 {
3729         struct wpa_driver_nl80211_data *drv = priv;
3730
3731         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3732                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3733         drv->operstate = state;
3734         return wpa_driver_nl80211_send_oper_ifla(
3735                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3736 }
3737
3738
3739 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3740 {
3741         struct wpa_driver_nl80211_data *drv = priv;
3742         struct nl_msg *msg;
3743         struct nl80211_sta_flag_update upd;
3744
3745         msg = nlmsg_alloc();
3746         if (!msg)
3747                 return -ENOMEM;
3748
3749         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3750                     0, NL80211_CMD_SET_STATION, 0);
3751
3752         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3753                     if_nametoindex(drv->ifname));
3754         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3755
3756         os_memset(&upd, 0, sizeof(upd));
3757         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3758         if (authorized)
3759                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3760         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3761
3762         return send_and_recv_msgs(drv, msg, NULL, NULL);
3763  nla_put_failure:
3764         return -ENOBUFS;
3765 }
3766
3767 #endif /* HOSTAPD */
3768
3769
3770 #ifdef HOSTAPD
3771
3772 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3773                                  int ifindex)
3774 {
3775         struct i802_bss *bss = &drv->bss;
3776         while (bss) {
3777                 if (ifindex == bss->ifindex)
3778                         return bss;
3779                 bss = bss->next;
3780         }
3781         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3782         return NULL;
3783 }
3784
3785
3786 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3787 {
3788         int i;
3789         int *old;
3790
3791         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3792                    ifidx);
3793         for (i = 0; i < drv->num_if_indices; i++) {
3794                 if (drv->if_indices[i] == 0) {
3795                         drv->if_indices[i] = ifidx;
3796                         return;
3797                 }
3798         }
3799
3800         if (drv->if_indices != drv->default_if_indices)
3801                 old = drv->if_indices;
3802         else
3803                 old = NULL;
3804
3805         drv->if_indices = realloc(old,
3806                                   sizeof(int) * (drv->num_if_indices + 1));
3807         if (!drv->if_indices) {
3808                 if (!old)
3809                         drv->if_indices = drv->default_if_indices;
3810                 else
3811                         drv->if_indices = old;
3812                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3813                            "interfaces");
3814                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3815                 return;
3816         }
3817         drv->if_indices[drv->num_if_indices] = ifidx;
3818         drv->num_if_indices++;
3819 }
3820
3821
3822 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3823 {
3824         int i;
3825
3826         for (i = 0; i < drv->num_if_indices; i++) {
3827                 if (drv->if_indices[i] == ifidx) {
3828                         drv->if_indices[i] = 0;
3829                         break;
3830                 }
3831         }
3832 }
3833
3834
3835 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3836 {
3837         int i;
3838
3839         for (i = 0; i < drv->num_if_indices; i++)
3840                 if (drv->if_indices[i] == ifidx)
3841                         return 1;
3842
3843         return 0;
3844 }
3845
3846
3847 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3848                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3849                         size_t seq_len, const u8 *key, size_t key_len)
3850 {
3851         struct wpa_driver_nl80211_data *drv = priv;
3852         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3853                            set_tx, seq, seq_len, key, key_len);
3854 }
3855
3856
3857 static inline int min_int(int a, int b)
3858 {
3859         if (a < b)
3860                 return a;
3861         return b;
3862 }
3863
3864
3865 static int get_key_handler(struct nl_msg *msg, void *arg)
3866 {
3867         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3868         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3869
3870         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3871                   genlmsg_attrlen(gnlh, 0), NULL);
3872
3873         /*
3874          * TODO: validate the key index and mac address!
3875          * Otherwise, there's a race condition as soon as
3876          * the kernel starts sending key notifications.
3877          */
3878
3879         if (tb[NL80211_ATTR_KEY_SEQ])
3880                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3881                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3882         return NL_SKIP;
3883 }
3884
3885
3886 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3887                            int idx, u8 *seq)
3888 {
3889         struct wpa_driver_nl80211_data *drv = priv;
3890         struct nl_msg *msg;
3891
3892         msg = nlmsg_alloc();
3893         if (!msg)
3894                 return -ENOMEM;
3895
3896         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3897                     0, NL80211_CMD_GET_KEY, 0);
3898
3899         if (addr)
3900                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3901         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3902         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3903
3904         memset(seq, 0, 6);
3905
3906         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3907  nla_put_failure:
3908         return -ENOBUFS;
3909 }
3910
3911
3912 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3913                               int mode)
3914 {
3915         struct wpa_driver_nl80211_data *drv = priv;
3916         struct nl_msg *msg;
3917         u8 rates[NL80211_MAX_SUPP_RATES];
3918         u8 rates_len = 0;
3919         int i;
3920
3921         msg = nlmsg_alloc();
3922         if (!msg)
3923                 return -ENOMEM;
3924
3925         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3926                     NL80211_CMD_SET_BSS, 0);
3927
3928         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3929                 rates[rates_len++] = basic_rates[i] / 5;
3930
3931         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3932
3933         /* TODO: multi-BSS support */
3934         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3935
3936         return send_and_recv_msgs(drv, msg, NULL, NULL);
3937  nla_put_failure:
3938         return -ENOBUFS;
3939 }
3940
3941
3942 /* Set kernel driver on given frequency (MHz) */
3943 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3944 {
3945         struct wpa_driver_nl80211_data *drv = priv;
3946         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3947                                            freq->sec_channel_offset);
3948 }
3949
3950
3951 static int i802_set_rts(void *priv, int rts)
3952 {
3953         struct wpa_driver_nl80211_data *drv = priv;
3954         struct nl_msg *msg;
3955         int ret = -ENOBUFS;
3956         u32 val;
3957
3958         msg = nlmsg_alloc();
3959         if (!msg)
3960                 return -ENOMEM;
3961
3962         if (rts >= 2347)
3963                 val = (u32) -1;
3964         else
3965                 val = rts;
3966
3967         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3968                     0, NL80211_CMD_SET_WIPHY, 0);
3969         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3970         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3971
3972         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3973         if (!ret)
3974                 return 0;
3975 nla_put_failure:
3976         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3977                    "%d (%s)", rts, ret, strerror(-ret));
3978         return ret;
3979 }
3980
3981
3982 static int i802_set_frag(void *priv, int frag)
3983 {
3984         struct wpa_driver_nl80211_data *drv = priv;
3985         struct nl_msg *msg;
3986         int ret = -ENOBUFS;
3987         u32 val;
3988
3989         msg = nlmsg_alloc();
3990         if (!msg)
3991                 return -ENOMEM;
3992
3993         if (frag >= 2346)
3994                 val = (u32) -1;
3995         else
3996                 val = frag;
3997
3998         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3999                     0, NL80211_CMD_SET_WIPHY, 0);
4000         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4001         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4002
4003         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4004         if (!ret)
4005                 return 0;
4006 nla_put_failure:
4007         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4008                    "%d: %d (%s)", frag, ret, strerror(-ret));
4009         return ret;
4010 }
4011
4012
4013 static int i802_flush(void *priv)
4014 {
4015         struct wpa_driver_nl80211_data *drv = priv;
4016         struct nl_msg *msg;
4017
4018         msg = nlmsg_alloc();
4019         if (!msg)
4020                 return -1;
4021
4022         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4023                     0, NL80211_CMD_DEL_STATION, 0);
4024
4025         /*
4026          * XXX: FIX! this needs to flush all VLANs too
4027          */
4028         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4029                     if_nametoindex(drv->ifname));
4030
4031         return send_and_recv_msgs(drv, msg, NULL, NULL);
4032  nla_put_failure:
4033         return -ENOBUFS;
4034 }
4035
4036
4037 static int get_sta_handler(struct nl_msg *msg, void *arg)
4038 {
4039         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4040         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4041         struct hostap_sta_driver_data *data = arg;
4042         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4043         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4044                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4045                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4046                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4047                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4048                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4049         };
4050
4051         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4052                   genlmsg_attrlen(gnlh, 0), NULL);
4053
4054         /*
4055          * TODO: validate the interface and mac address!
4056          * Otherwise, there's a race condition as soon as
4057          * the kernel starts sending station notifications.
4058          */
4059
4060         if (!tb[NL80211_ATTR_STA_INFO]) {
4061                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4062                 return NL_SKIP;
4063         }
4064         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4065                              tb[NL80211_ATTR_STA_INFO],
4066                              stats_policy)) {
4067                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4068                 return NL_SKIP;
4069         }
4070
4071         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4072                 data->inactive_msec =
4073                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4074         if (stats[NL80211_STA_INFO_RX_BYTES])
4075                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4076         if (stats[NL80211_STA_INFO_TX_BYTES])
4077                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4078         if (stats[NL80211_STA_INFO_RX_PACKETS])
4079                 data->rx_packets =
4080                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4081         if (stats[NL80211_STA_INFO_TX_PACKETS])
4082                 data->tx_packets =
4083                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4084
4085         return NL_SKIP;
4086 }
4087
4088 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4089                               const u8 *addr)
4090 {
4091         struct wpa_driver_nl80211_data *drv = priv;
4092         struct nl_msg *msg;
4093
4094         os_memset(data, 0, sizeof(*data));
4095         msg = nlmsg_alloc();
4096         if (!msg)
4097                 return -ENOMEM;
4098
4099         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4100                     0, NL80211_CMD_GET_STATION, 0);
4101
4102         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4103         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4104
4105         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4106  nla_put_failure:
4107         return -ENOBUFS;
4108 }
4109
4110
4111 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4112                                     int cw_min, int cw_max, int burst_time)
4113 {
4114         struct wpa_driver_nl80211_data *drv = priv;
4115         struct nl_msg *msg;
4116         struct nlattr *txq, *params;
4117
4118         msg = nlmsg_alloc();
4119         if (!msg)
4120                 return -1;
4121
4122         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4123                     0, NL80211_CMD_SET_WIPHY, 0);
4124
4125         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4126
4127         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4128         if (!txq)
4129                 goto nla_put_failure;
4130
4131         /* We are only sending parameters for a single TXQ at a time */
4132         params = nla_nest_start(msg, 1);
4133         if (!params)
4134                 goto nla_put_failure;
4135
4136         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4137         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4138          * 32 usec, so need to convert the value here. */
4139         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4140         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4141         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4142         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4143
4144         nla_nest_end(msg, params);
4145
4146         nla_nest_end(msg, txq);
4147
4148         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4149                 return 0;
4150  nla_put_failure:
4151         return -1;
4152 }
4153
4154
4155 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
4156 {
4157         struct wpa_driver_nl80211_data *drv = priv;
4158         int ifidx;
4159         struct i802_bss *bss;
4160
4161         bss = os_zalloc(sizeof(*bss));
4162         if (bss == NULL)
4163                 return -1;
4164
4165         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
4166         if (ifidx < 0) {
4167                 os_free(bss);
4168                 return -1;
4169         }
4170         bss->ifindex = ifidx;
4171         if (hostapd_set_iface_flags(priv, ifname, 1)) {
4172                 nl80211_remove_iface(priv, ifidx);
4173                 os_free(bss);
4174                 return -1;
4175         }
4176         bss->next = drv->bss.next;
4177         drv->bss.next = bss;
4178         return 0;
4179 }
4180
4181
4182 static int i802_bss_remove(void *priv, const char *ifname)
4183 {
4184         struct wpa_driver_nl80211_data *drv = priv;
4185         struct i802_bss *bss, *prev;
4186         int ifindex = if_nametoindex(ifname);
4187         nl80211_remove_iface(priv, ifindex);
4188         prev = &drv->bss;
4189         bss = drv->bss.next;
4190         while (bss) {
4191                 if (ifindex == bss->ifindex) {
4192                         prev->next = bss->next;
4193                         os_free(bss);
4194                         break;
4195                 }
4196                 prev = bss;
4197                 bss = bss->next;
4198         }
4199         return 0;
4200 }
4201
4202
4203 static int i802_set_beacon(const char *iface, void *priv,
4204                            const u8 *head, size_t head_len,
4205                            const u8 *tail, size_t tail_len, int dtim_period)
4206 {
4207         return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
4208                                                    head, head_len,
4209                                                    tail, tail_len,
4210                                                    dtim_period);
4211 }
4212
4213
4214 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4215 {
4216         struct wpa_driver_nl80211_data *drv = priv;
4217         struct nl_msg *msg;
4218
4219         msg = nlmsg_alloc();
4220         if (!msg)
4221                 return -ENOMEM;
4222
4223         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4224                     NL80211_CMD_SET_BSS, 0);
4225
4226         if (cts >= 0)
4227                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4228         if (preamble >= 0)
4229                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4230         if (slot >= 0)
4231                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4232
4233         /* TODO: multi-BSS support */
4234         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4235
4236         return send_and_recv_msgs(drv, msg, NULL, NULL);
4237  nla_put_failure:
4238         return -ENOBUFS;
4239 }
4240
4241
4242 static int i802_set_cts_protect(void *priv, int value)
4243 {
4244         return i802_set_bss(priv, value, -1, -1);
4245 }
4246
4247
4248 static int i802_set_preamble(void *priv, int value)
4249 {
4250         return i802_set_bss(priv, -1, value, -1);
4251 }
4252
4253
4254 static int i802_set_short_slot_time(void *priv, int value)
4255 {
4256         return i802_set_bss(priv, -1, -1, value);
4257 }
4258
4259
4260 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
4261 {
4262         switch (type) {
4263         case HOSTAPD_IF_VLAN:
4264                 return NL80211_IFTYPE_AP_VLAN;
4265         }
4266         return -1;
4267 }
4268
4269
4270 static int i802_if_add(const char *iface, void *priv,
4271                        enum hostapd_driver_if_type type, char *ifname,
4272                        const u8 *addr)
4273 {
4274         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
4275                 return -1;
4276         return 0;
4277 }
4278
4279
4280 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
4281                           char *ifname, const u8 *addr)
4282 {
4283         /* unused at the moment */
4284         return -1;
4285 }
4286
4287
4288 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
4289                           const char *ifname, const u8 *addr)
4290 {
4291         nl80211_remove_iface(priv, if_nametoindex(ifname));
4292         return 0;
4293 }
4294
4295
4296 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4297                              const char *ifname, int vlan_id)
4298 {
4299         struct wpa_driver_nl80211_data *drv = priv;
4300         struct nl_msg *msg;
4301
4302         msg = nlmsg_alloc();
4303         if (!msg)
4304                 return -ENOMEM;
4305
4306         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4307                     0, NL80211_CMD_SET_STATION, 0);
4308
4309         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4310                     if_nametoindex(drv->ifname));
4311         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4312         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4313                     if_nametoindex(ifname));
4314
4315         return send_and_recv_msgs(drv, msg, NULL, NULL);
4316  nla_put_failure:
4317         return -ENOBUFS;
4318 }
4319
4320
4321 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4322 {
4323         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4324         struct sockaddr_ll lladdr;
4325         unsigned char buf[3000];
4326         int len;
4327         socklen_t fromlen = sizeof(lladdr);
4328
4329         len = recvfrom(sock, buf, sizeof(buf), 0,
4330                        (struct sockaddr *)&lladdr, &fromlen);
4331         if (len < 0) {
4332                 perror("recv");
4333                 return;
4334         }
4335
4336         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4337                 void *ctx;
4338                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4339                 if (!ctx)
4340                         return;
4341                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4342         }
4343 }
4344
4345
4346 static int i802_get_inact_sec(void *priv, const u8 *addr)
4347 {
4348         struct hostap_sta_driver_data data;
4349         int ret;
4350
4351         data.inactive_msec = (unsigned long) -1;
4352         ret = i802_read_sta_data(priv, &data, addr);
4353         if (ret || data.inactive_msec == (unsigned long) -1)
4354                 return -1;
4355         return data.inactive_msec / 1000;
4356 }
4357
4358
4359 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4360 {
4361 #if 0
4362         /* TODO */
4363 #endif
4364         return 0;
4365 }
4366
4367
4368 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4369                            int reason)
4370 {
4371         struct wpa_driver_nl80211_data *drv = priv;
4372         struct ieee80211_mgmt mgmt;
4373
4374         memset(&mgmt, 0, sizeof(mgmt));
4375         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4376                                           WLAN_FC_STYPE_DEAUTH);
4377         memcpy(mgmt.da, addr, ETH_ALEN);
4378         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4379         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4380         mgmt.u.deauth.reason_code = host_to_le16(reason);
4381         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4382                                             IEEE80211_HDRLEN +
4383                                             sizeof(mgmt.u.deauth));
4384 }
4385
4386
4387 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4388                              int reason)
4389 {
4390         struct wpa_driver_nl80211_data *drv = priv;
4391         struct ieee80211_mgmt mgmt;
4392
4393         memset(&mgmt, 0, sizeof(mgmt));
4394         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4395                                           WLAN_FC_STYPE_DISASSOC);
4396         memcpy(mgmt.da, addr, ETH_ALEN);
4397         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4398         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4399         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4400         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4401                                             IEEE80211_HDRLEN +
4402                                             sizeof(mgmt.u.disassoc));
4403 }
4404
4405
4406 static void *i802_init(struct hostapd_data *hapd,
4407                        struct wpa_init_params *params)
4408 {
4409         struct wpa_driver_nl80211_data *drv;
4410         size_t i;
4411
4412         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4413         if (drv == NULL)
4414                 return NULL;
4415
4416         drv->bss.ifindex = drv->ifindex;
4417
4418         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4419         drv->if_indices = drv->default_if_indices;
4420         for (i = 0; i < params->num_bridge; i++) {
4421                 if (params->bridge[i])
4422                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4423         }
4424
4425         /* start listening for EAPOL on the default AP interface */
4426         add_ifidx(drv, drv->ifindex);
4427
4428         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4429                 goto failed;
4430
4431         if (params->bssid) {
4432                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4433                         goto failed;
4434         }
4435
4436         if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
4437                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4438                            "into AP mode", drv->ifname);
4439                 goto failed;
4440         }
4441
4442         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4443                 goto failed;
4444
4445         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4446         if (drv->eapol_sock < 0) {
4447                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4448                 goto failed;
4449         }
4450
4451         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4452         {
4453                 printf("Could not register read socket for eapol\n");
4454                 goto failed;
4455         }
4456
4457         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4458                 goto failed;
4459
4460         return drv;
4461
4462 failed:
4463         nl80211_remove_monitor_interface(drv);
4464         if (drv->ioctl_sock >= 0)
4465                 close(drv->ioctl_sock);
4466
4467         genl_family_put(drv->nl80211);
4468         nl_cache_free(drv->nl_cache);
4469         nl_handle_destroy(drv->nl_handle);
4470         nl_cb_put(drv->nl_cb);
4471
4472         os_free(drv);
4473         return NULL;
4474 }
4475
4476
4477 static void i802_deinit(void *priv)
4478 {
4479         wpa_driver_nl80211_deinit(priv);
4480 }
4481
4482 #endif /* HOSTAPD */
4483
4484
4485 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4486         .name = "nl80211",
4487         .desc = "Linux nl80211/cfg80211",
4488 #ifndef HOSTAPD
4489         .get_bssid = wpa_driver_nl80211_get_bssid,
4490         .get_ssid = wpa_driver_nl80211_get_ssid,
4491         .set_key = wpa_driver_nl80211_set_key,
4492 #endif /* HOSTAPD */
4493         .scan2 = wpa_driver_nl80211_scan,
4494         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4495 #ifndef HOSTAPD
4496         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4497         .disassociate = wpa_driver_nl80211_disassociate,
4498         .authenticate = wpa_driver_nl80211_authenticate,
4499         .associate = wpa_driver_nl80211_associate,
4500         .init = wpa_driver_nl80211_init,
4501         .deinit = wpa_driver_nl80211_deinit,
4502         .get_capa = wpa_driver_nl80211_get_capa,
4503         .set_operstate = wpa_driver_nl80211_set_operstate,
4504         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4505 #endif /* HOSTAPD */
4506         .set_country = wpa_driver_nl80211_set_country,
4507         .set_mode = wpa_driver_nl80211_set_mode,
4508 #ifdef CONFIG_AP
4509         .set_beacon = wpa_driver_nl80211_set_beacon,
4510 #endif /* CONFIG_AP */
4511 #if defined(CONFIG_AP) || defined(HOSTAPD)
4512         .send_mlme = wpa_driver_nl80211_send_mlme,
4513         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4514         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4515         .sta_add = wpa_driver_nl80211_sta_add,
4516         .sta_remove = wpa_driver_nl80211_sta_remove,
4517         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4518         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4519 #endif /* CONFIG_AP || HOSTAPD */
4520 #ifdef HOSTAPD
4521         .hapd_init = i802_init,
4522         .hapd_deinit = i802_deinit,
4523         .hapd_set_key = i802_set_key,
4524         .get_seqnum = i802_get_seqnum,
4525         .flush = i802_flush,
4526         .read_sta_data = i802_read_sta_data,
4527         .sta_deauth = i802_sta_deauth,
4528         .sta_disassoc = i802_sta_disassoc,
4529         .get_inact_sec = i802_get_inact_sec,
4530         .sta_clear_stats = i802_sta_clear_stats,
4531         .set_freq = i802_set_freq,
4532         .set_rts = i802_set_rts,
4533         .set_frag = i802_set_frag,
4534         .set_rate_sets = i802_set_rate_sets,
4535         .hapd_set_beacon = i802_set_beacon,
4536         .set_cts_protect = i802_set_cts_protect,
4537         .set_preamble = i802_set_preamble,
4538         .set_short_slot_time = i802_set_short_slot_time,
4539         .set_tx_queue_params = i802_set_tx_queue_params,
4540         .bss_add = i802_bss_add,
4541         .bss_remove = i802_bss_remove,
4542         .if_add = i802_if_add,
4543         .if_update = i802_if_update,
4544         .if_remove = i802_if_remove,
4545         .set_sta_vlan = i802_set_sta_vlan,
4546 #endif /* HOSTAPD */
4547 };