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
  28 #include "common.h"
  29 #include "driver.h"
  30 #include "eloop.h"
  31 #include "ieee802_11_defs.h"
  32
  33 #if defined(CONFIG_AP) || defined(HOSTAPD)
  34 #include <netpacket/packet.h>
  35 #include <linux/filter.h>
  36 #include "radiotap.h"
  37 #include "radiotap_iter.h"
  38
  39 #include "../../hostapd/sta_flags.h"
  40 #endif /* CONFIG_AP || HOSTAPD */
  41
  42 #ifdef HOSTAPD
  43 #include "ieee802_11_common.h"
  44 #endif /* HOSTAPD */
  45
  46 #ifdef CONFIG_LIBNL20
  47 /* libnl 2.0 compatibility code */
  48 #define nl_handle nl_sock
  49 #define nl_handle_alloc_cb nl_socket_alloc_cb
  50 #define nl_handle_destroy nl_socket_free
  51 #endif /* CONFIG_LIBNL20 */
  52
  53
  54 #ifndef IFF_LOWER_UP
  55 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  56 #endif
  57 #ifndef IFF_DORMANT
  58 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  59 #endif
  60
  61 #ifndef IF_OPER_DORMANT
  62 #define IF_OPER_DORMANT 5
  63 #endif
  64 #ifndef IF_OPER_UP
  65 #define IF_OPER_UP 6
  66 #endif
  67
  68 struct i802_bss {
  69         struct i802_bss *next;
  70         int ifindex;
  71         unsigned int beacon_set:1;
  72 };
  73
  74 struct wpa_driver_nl80211_data {
  75         void *ctx;
  76         int link_event_sock;
  77         int ioctl_sock; /* socket for ioctl() use */
  78         char ifname[IFNAMSIZ + 1];
  79         int ifindex;
  80         int if_removed;
  81         struct wpa_driver_capa capa;
  82         int has_capability;
  83
  84         int operstate;
  85
  86         int scan_complete_events;
  87
  88         struct nl_handle *nl_handle;
  89         struct nl_handle *nl_handle_event;
  90         struct nl_cache *nl_cache;
  91         struct nl_cache *nl_cache_event;
  92         struct nl_cb *nl_cb;
  93         struct genl_family *nl80211;
  94
  95         u8 bssid[ETH_ALEN];
  96         int associated;
  97         u8 ssid[32];
  98         size_t ssid_len;
  99         int nlmode;
 100         int ap_scan_as_station;
 101
 102         int monitor_sock;
 103         int monitor_ifidx;
 104
 105         unsigned int beacon_set:1;
 106
 107 #ifdef HOSTAPD
 108         int eapol_sock; /* socket for EAPOL frames */
 109
 110         int default_if_indices[16];
 111         int *if_indices;
 112         int num_if_indices;
 113
 114         struct i802_bss bss;
 115
 116         int last_freq;
 117         int last_freq_ht;
 118 #endif /* HOSTAPD */
 119 };
 120
 121
 122 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 123                                             void *timeout_ctx);
 124 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 125 static int
 126 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 127
 128 #if defined(CONFIG_AP) || defined(HOSTAPD)
 129 static void nl80211_remove_monitor_interface(
 130         struct wpa_driver_nl80211_data *drv);
 131 #endif /* CONFIG_AP || HOSTAPD */
 132
 133 #ifdef CONFIG_AP
 134 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 135                                  int ifidx);
 136 #endif /* CONFIG_AP */
 137
 138 #ifdef HOSTAPD
 139 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 140 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 141 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 142                                  int ifindex);
 143 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 144                                  int ifidx);
 145 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 146 #endif /* HOSTAPD */
 147
 148
 149 /* nl80211 code */
 150 static int ack_handler(struct nl_msg *msg, void *arg)
 151 {
 152         int *err = arg;
 153         *err = 0;
 154         return NL_STOP;
 155 }
 156
 157 static int finish_handler(struct nl_msg *msg, void *arg)
 158 {
 159         int *ret = arg;
 160         *ret = 0;
 161         return NL_SKIP;
 162 }
 163
 164 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 165                          void *arg)
 166 {
 167         int *ret = arg;
 168         *ret = err->error;
 169         return NL_SKIP;
 170 }
 171
 172
 173 static int no_seq_check(struct nl_msg *msg, void *arg)
 174 {
 175         return NL_OK;
 176 }
 177
 178
 179 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 180                               struct nl_msg *msg,
 181                               int (*valid_handler)(struct nl_msg *, void *),
 182                               void *valid_data)
 183 {
 184         struct nl_cb *cb;
 185         int err = -ENOMEM;
 186
 187         cb = nl_cb_clone(drv->nl_cb);
 188         if (!cb)
 189                 goto out;
 190
 191         err = nl_send_auto_complete(drv->nl_handle, msg);
 192         if (err < 0)
 193                 goto out;
 194
 195         err = 1;
 196
 197         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 198         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 199         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 200
 201         if (valid_handler)
 202                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 203                           valid_handler, valid_data);
 204
 205         while (err > 0)
 206                 nl_recvmsgs(drv->nl_handle, cb);
 207  out:
 208         nl_cb_put(cb);
 209         nlmsg_free(msg);
 210         return err;
 211 }
 212
 213
 214 struct family_data {
 215         const char *group;
 216         int id;
 217 };
 218
 219
 220 static int family_handler(struct nl_msg *msg, void *arg)
 221 {
 222         struct family_data *res = arg;
 223         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 224         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 225         struct nlattr *mcgrp;
 226         int i;
 227
 228         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 229                   genlmsg_attrlen(gnlh, 0), NULL);
 230         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 231                 return NL_SKIP;
 232
 233         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 234                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 235                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 236                           nla_len(mcgrp), NULL);
 237                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 238                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 239                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 240                                res->group,
 241                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 242                         continue;
 243                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 244                 break;
 245         };
 246
 247         return NL_SKIP;
 248 }
 249
 250
 251 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 252                                const char *family, const char *group)
 253 {
 254         struct nl_msg *msg;
 255         int ret = -1;
 256         struct family_data res = { group, -ENOENT };
 257
 258         msg = nlmsg_alloc();
 259         if (!msg)
 260                 return -ENOMEM;
 261         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 262                     0, 0, CTRL_CMD_GETFAMILY, 0);
 263         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 264
 265         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 266         msg = NULL;
 267         if (ret == 0)
 268                 ret = res.id;
 269
 270 nla_put_failure:
 271         nlmsg_free(msg);
 272         return ret;
 273 }
 274
 275
 276 #ifdef HOSTAPD
 277 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 278                         const char *ifname, u8 *addr)
 279 {
 280         struct ifreq ifr;
 281
 282         os_memset(&ifr, 0, sizeof(ifr));
 283         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 284         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 285                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 286                            ifname, errno, strerror(errno));
 287                 return -1;
 288         }
 289
 290         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 291                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 292                            ifname, ifr.ifr_hwaddr.sa_family);
 293                 return -1;
 294         }
 295         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 296
 297         return 0;
 298 }
 299
 300
 301 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 302                         const char *ifname, const u8 *addr)
 303 {
 304         struct ifreq ifr;
 305
 306         os_memset(&ifr, 0, sizeof(ifr));
 307         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 308         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 309         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 310
 311         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 312                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 313                            ifname, errno, strerror(errno));
 314                 return -1;
 315         }
 316
 317         return 0;
 318 }
 319 #endif /* HOSTAPD */
 320
 321
 322 static int wpa_driver_nl80211_send_oper_ifla(
 323         struct wpa_driver_nl80211_data *drv,
 324         int linkmode, int operstate)
 325 {
 326         struct {
 327                 struct nlmsghdr hdr;
 328                 struct ifinfomsg ifinfo;
 329                 char opts[16];
 330         } req;
 331         struct rtattr *rta;
 332         static int nl_seq;
 333         ssize_t ret;
 334
 335         os_memset(&req, 0, sizeof(req));
 336
 337         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 338         req.hdr.nlmsg_type = RTM_SETLINK;
 339         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 340         req.hdr.nlmsg_seq = ++nl_seq;
 341         req.hdr.nlmsg_pid = 0;
 342
 343         req.ifinfo.ifi_family = AF_UNSPEC;
 344         req.ifinfo.ifi_type = 0;
 345         req.ifinfo.ifi_index = drv->ifindex;
 346         req.ifinfo.ifi_flags = 0;
 347         req.ifinfo.ifi_change = 0;
 348
 349         if (linkmode != -1) {
 350                 rta = aliasing_hide_typecast(
 351                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
 352                         struct rtattr);
 353                 rta->rta_type = IFLA_LINKMODE;
 354                 rta->rta_len = RTA_LENGTH(sizeof(char));
 355                 *((char *) RTA_DATA(rta)) = linkmode;
 356                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 357                         RTA_LENGTH(sizeof(char));
 358         }
 359         if (operstate != -1) {
 360                 rta = aliasing_hide_typecast(
 361                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
 362                         struct rtattr);
 363                 rta->rta_type = IFLA_OPERSTATE;
 364                 rta->rta_len = RTA_LENGTH(sizeof(char));
 365                 *((char *) RTA_DATA(rta)) = operstate;
 366                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 367                         RTA_LENGTH(sizeof(char));
 368         }
 369
 370         wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
 371                    linkmode, operstate);
 372
 373         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 374         if (ret < 0) {
 375                 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
 376                            " %s (assume operstate is not supported)",
 377                            strerror(errno));
 378         }
 379
 380         return ret < 0 ? -1 : 0;
 381 }
 382
 383
 384 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 385 {
 386         struct wpa_driver_nl80211_data *drv = priv;
 387         if (!drv->associated)
 388                 return -1;
 389         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 390         return 0;
 391 }
 392
 393
 394 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 395 {
 396         struct wpa_driver_nl80211_data *drv = priv;
 397         if (!drv->associated)
 398                 return -1;
 399         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 400         return drv->ssid_len;
 401 }
 402
 403
 404 #ifndef HOSTAPD
 405
 406 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 407                                           void *ctx, char *buf, size_t len,
 408                                           int del)
 409 {
 410         union wpa_event_data event;
 411
 412         os_memset(&event, 0, sizeof(event));
 413         if (len > sizeof(event.interface_status.ifname))
 414                 len = sizeof(event.interface_status.ifname) - 1;
 415         os_memcpy(event.interface_status.ifname, buf, len);
 416         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 417                 EVENT_INTERFACE_ADDED;
 418
 419         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 420                    del ? "DEL" : "NEW",
 421                    event.interface_status.ifname,
 422                    del ? "removed" : "added");
 423
 424         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 425                 if (del)
 426                         drv->if_removed = 1;
 427                 else
 428                         drv->if_removed = 0;
 429         }
 430
 431         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 432 }
 433
 434
 435 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 436                                          struct nlmsghdr *h)
 437 {
 438         struct ifinfomsg *ifi;
 439         int attrlen, _nlmsg_len, rta_len;
 440         struct rtattr *attr;
 441
 442         ifi = NLMSG_DATA(h);
 443
 444         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 445
 446         attrlen = h->nlmsg_len - _nlmsg_len;
 447         if (attrlen < 0)
 448                 return 0;
 449
 450         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 451
 452         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 453         while (RTA_OK(attr, attrlen)) {
 454                 if (attr->rta_type == IFLA_IFNAME) {
 455                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 456                             == 0)
 457                                 return 1;
 458                         else
 459                                 break;
 460                 }
 461                 attr = RTA_NEXT(attr, attrlen);
 462         }
 463
 464         return 0;
 465 }
 466
 467
 468 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 469                                           int ifindex, struct nlmsghdr *h)
 470 {
 471         if (drv->ifindex == ifindex)
 472                 return 1;
 473
 474         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 475                 drv->ifindex = if_nametoindex(drv->ifname);
 476                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 477                            "interface");
 478                 wpa_driver_nl80211_finish_drv_init(drv);
 479                 return 1;
 480         }
 481
 482         return 0;
 483 }
 484
 485
 486 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 487                                               void *ctx, struct nlmsghdr *h,
 488                                               size_t len)
 489 {
 490         struct ifinfomsg *ifi;
 491         int attrlen, _nlmsg_len, rta_len;
 492         struct rtattr * attr;
 493
 494         if (len < sizeof(*ifi))
 495                 return;
 496
 497         ifi = NLMSG_DATA(h);
 498
 499         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 500                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 501                            ifi->ifi_index);
 502                 return;
 503         }
 504
 505         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 506                    "(%s%s%s%s)",
 507                    drv->operstate, ifi->ifi_flags,
 508                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 509                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 510                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 511                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 512         /*
 513          * Some drivers send the association event before the operup event--in
 514          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 515          * fails. This will hit us when wpa_supplicant does not need to do
 516          * IEEE 802.1X authentication
 517          */
 518         if (drv->operstate == 1 &&
 519             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 520             !(ifi->ifi_flags & IFF_RUNNING))
 521                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 522
 523         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 524
 525         attrlen = h->nlmsg_len - _nlmsg_len;
 526         if (attrlen < 0)
 527                 return;
 528
 529         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 530
 531         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 532         while (RTA_OK(attr, attrlen)) {
 533                 if (attr->rta_type == IFLA_IFNAME) {
 534                         wpa_driver_nl80211_event_link(
 535                                 drv, ctx,
 536                                 ((char *) attr) + rta_len,
 537                                 attr->rta_len - rta_len, 0);
 538                 }
 539                 attr = RTA_NEXT(attr, attrlen);
 540         }
 541 }
 542
 543
 544 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 545                                               void *ctx, struct nlmsghdr *h,
 546                                               size_t len)
 547 {
 548         struct ifinfomsg *ifi;
 549         int attrlen, _nlmsg_len, rta_len;
 550         struct rtattr * attr;
 551
 552         if (len < sizeof(*ifi))
 553                 return;
 554
 555         ifi = NLMSG_DATA(h);
 556
 557         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 558
 559         attrlen = h->nlmsg_len - _nlmsg_len;
 560         if (attrlen < 0)
 561                 return;
 562
 563         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 564
 565         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 566         while (RTA_OK(attr, attrlen)) {
 567                 if (attr->rta_type == IFLA_IFNAME) {
 568                         wpa_driver_nl80211_event_link(
 569                                 drv, ctx,
 570                                 ((char *) attr) + rta_len,
 571                                 attr->rta_len - rta_len, 1);
 572                 }
 573                 attr = RTA_NEXT(attr, attrlen);
 574         }
 575 }
 576
 577
 578 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 579                                                   void *sock_ctx)
 580 {
 581         char buf[8192];
 582         int left;
 583         struct sockaddr_nl from;
 584         socklen_t fromlen;
 585         struct nlmsghdr *h;
 586         int max_events = 10;
 587
 588 try_again:
 589         fromlen = sizeof(from);
 590         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 591                         (struct sockaddr *) &from, &fromlen);
 592         if (left < 0) {
 593                 if (errno != EINTR && errno != EAGAIN)
 594                         perror("recvfrom(netlink)");
 595                 return;
 596         }
 597
 598         h = (struct nlmsghdr *) buf;
 599         while (left >= (int) sizeof(*h)) {
 600                 int len, plen;
 601
 602                 len = h->nlmsg_len;
 603                 plen = len - sizeof(*h);
 604                 if (len > left || plen < 0) {
 605                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 606                                    "len=%d left=%d plen=%d",
 607                                    len, left, plen);
 608                         break;
 609                 }
 610
 611                 switch (h->nlmsg_type) {
 612                 case RTM_NEWLINK:
 613                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 614                                                           h, plen);
 615                         break;
 616                 case RTM_DELLINK:
 617                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 618                                                           h, plen);
 619                         break;
 620                 }
 621
 622                 len = NLMSG_ALIGN(len);
 623                 left -= len;
 624                 h = (struct nlmsghdr *) ((char *) h + len);
 625         }
 626
 627         if (left > 0) {
 628                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 629                            "message", left);
 630         }
 631
 632         if (--max_events > 0) {
 633                 /*
 634                  * Try to receive all events in one eloop call in order to
 635                  * limit race condition on cases where AssocInfo event, Assoc
 636                  * event, and EAPOL frames are received more or less at the
 637                  * same time. We want to process the event messages first
 638                  * before starting EAPOL processing.
 639                  */
 640                 goto try_again;
 641         }
 642 }
 643
 644 #endif /* HOSTAPD */
 645
 646
 647 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 648                             const u8 *frame, size_t len)
 649 {
 650         const struct ieee80211_mgmt *mgmt;
 651         union wpa_event_data event;
 652
 653         mgmt = (const struct ieee80211_mgmt *) frame;
 654         if (len < 24 + sizeof(mgmt->u.auth)) {
 655                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 656                            "frame");
 657                 return;
 658         }
 659
 660         os_memset(&event, 0, sizeof(event));
 661         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 662         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 663         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 664         if (len > 24 + sizeof(mgmt->u.auth)) {
 665                 event.auth.ies = mgmt->u.auth.variable;
 666                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 667         }
 668
 669         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 670 }
 671
 672
 673 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 674                             const u8 *frame, size_t len)
 675 {
 676         const struct ieee80211_mgmt *mgmt;
 677         union wpa_event_data event;
 678         u16 status;
 679
 680         mgmt = (const struct ieee80211_mgmt *) frame;
 681         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 682                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 683                            "frame");
 684                 return;
 685         }
 686
 687         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 688         if (status != WLAN_STATUS_SUCCESS) {
 689                 os_memset(&event, 0, sizeof(event));
 690                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 691                         event.assoc_reject.resp_ies =
 692                                 (u8 *) mgmt->u.assoc_resp.variable;
 693                         event.assoc_reject.resp_ies_len =
 694                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 695                 }
 696                 event.assoc_reject.status_code = status;
 697
 698                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 699                 return;
 700         }
 701
 702         drv->associated = 1;
 703         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 704
 705         os_memset(&event, 0, sizeof(event));
 706         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 707                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 708                 event.assoc_info.resp_ies_len =
 709                         len - 24 - sizeof(mgmt->u.assoc_resp);
 710         }
 711
 712         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 713 }
 714
 715
 716 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 717                                enum nl80211_commands cmd, struct nlattr *status,
 718                                struct nlattr *addr, struct nlattr *req_ie,
 719                                struct nlattr *resp_ie)
 720 {
 721         union wpa_event_data event;
 722
 723         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 724                 /*
 725                  * Avoid reporting two association events that would confuse
 726                  * the core code.
 727                  */
 728                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 729                            "when using userspace SME", cmd);
 730                 return;
 731         }
 732
 733         os_memset(&event, 0, sizeof(event));
 734         if (cmd == NL80211_CMD_CONNECT &&
 735             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 736                 if (resp_ie) {
 737                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 738                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 739                 }
 740                 event.assoc_reject.status_code = nla_get_u16(status);
 741                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 742                 return;
 743         }
 744
 745         drv->associated = 1;
 746         if (addr)
 747                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 748
 749         if (req_ie) {
 750                 event.assoc_info.req_ies = nla_data(req_ie);
 751                 event.assoc_info.req_ies_len = nla_len(req_ie);
 752         }
 753         if (resp_ie) {
 754                 event.assoc_info.resp_ies = nla_data(resp_ie);
 755                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 756         }
 757
 758         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 759 }
 760
 761
 762 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 763                                enum nl80211_commands cmd, struct nlattr *addr)
 764 {
 765         union wpa_event_data event;
 766         enum wpa_event_type ev;
 767
 768         if (nla_len(addr) != ETH_ALEN)
 769                 return;
 770
 771         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 772                    cmd, MAC2STR((u8 *) nla_data(addr)));
 773
 774         if (cmd == NL80211_CMD_AUTHENTICATE)
 775                 ev = EVENT_AUTH_TIMED_OUT;
 776         else if (cmd == NL80211_CMD_ASSOCIATE)
 777                 ev = EVENT_ASSOC_TIMED_OUT;
 778         else
 779                 return;
 780
 781         os_memset(&event, 0, sizeof(event));
 782         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 783         wpa_supplicant_event(drv->ctx, ev, &event);
 784 }
 785
 786
 787 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 788                        enum nl80211_commands cmd, struct nlattr *frame,
 789                        struct nlattr *addr, struct nlattr *timed_out)
 790 {
 791         if (timed_out && addr) {
 792                 mlme_timeout_event(drv, cmd, addr);
 793                 return;
 794         }
 795
 796         if (frame == NULL) {
 797                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 798                            "data", cmd);
 799                 return;
 800         }
 801
 802         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 803         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 804                     nla_data(frame), nla_len(frame));
 805
 806         switch (cmd) {
 807         case NL80211_CMD_AUTHENTICATE:
 808                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 809                 break;
 810         case NL80211_CMD_ASSOCIATE:
 811                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 812                 break;
 813         case NL80211_CMD_DEAUTHENTICATE:
 814                 drv->associated = 0;
 815                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 816                 break;
 817         case NL80211_CMD_DISASSOCIATE:
 818                 drv->associated = 0;
 819                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 820                 break;
 821         default:
 822                 break;
 823         }
 824 }
 825
 826
 827 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 828                                            struct nlattr *tb[])
 829 {
 830         union wpa_event_data data;
 831
 832         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 833         os_memset(&data, 0, sizeof(data));
 834         if (tb[NL80211_ATTR_MAC]) {
 835                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 836                             nla_data(tb[NL80211_ATTR_MAC]),
 837                             nla_len(tb[NL80211_ATTR_MAC]));
 838                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 839         }
 840         if (tb[NL80211_ATTR_KEY_SEQ]) {
 841                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 842                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 843                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 844         }
 845         if (tb[NL80211_ATTR_KEY_TYPE]) {
 846                 enum nl80211_key_type key_type =
 847                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 848                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 849                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 850                         data.michael_mic_failure.unicast = 1;
 851         } else
 852                 data.michael_mic_failure.unicast = 1;
 853
 854         if (tb[NL80211_ATTR_KEY_IDX]) {
 855                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 856                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 857         }
 858
 859         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 860 }
 861
 862
 863 static int process_event(struct nl_msg *msg, void *arg)
 864 {
 865         struct wpa_driver_nl80211_data *drv = arg;
 866         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 867         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 868
 869         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 870                   genlmsg_attrlen(gnlh, 0), NULL);
 871
 872         if (tb[NL80211_ATTR_IFINDEX]) {
 873                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 874                 if (ifindex != drv->ifindex) {
 875                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 876                                    " for foreign interface (ifindex %d)",
 877                                    gnlh->cmd, ifindex);
 878                         return NL_SKIP;
 879                 }
 880         }
 881
 882         if (drv->ap_scan_as_station &&
 883             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 884              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 885                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 886                 drv->ap_scan_as_station = 0;
 887         }
 888
 889         switch (gnlh->cmd) {
 890         case NL80211_CMD_TRIGGER_SCAN:
 891                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 892                 break;
 893         case NL80211_CMD_NEW_SCAN_RESULTS:
 894                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 895                 drv->scan_complete_events = 1;
 896                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 897                                      drv->ctx);
 898                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 899                 break;
 900         case NL80211_CMD_SCAN_ABORTED:
 901                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 902                 /*
 903                  * Need to indicate that scan results are available in order
 904                  * not to make wpa_supplicant stop its scanning.
 905                  */
 906                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 907                                      drv->ctx);
 908                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 909                 break;
 910         case NL80211_CMD_AUTHENTICATE:
 911         case NL80211_CMD_ASSOCIATE:
 912         case NL80211_CMD_DEAUTHENTICATE:
 913         case NL80211_CMD_DISASSOCIATE:
 914                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 915                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
 916                 break;
 917         case NL80211_CMD_CONNECT:
 918         case NL80211_CMD_ROAM:
 919                 mlme_event_connect(drv, gnlh->cmd,
 920                                    tb[NL80211_ATTR_STATUS_CODE],
 921                                    tb[NL80211_ATTR_MAC],
 922                                    tb[NL80211_ATTR_REQ_IE],
 923                                    tb[NL80211_ATTR_RESP_IE]);
 924                 break;
 925         case NL80211_CMD_DISCONNECT:
 926                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 927                         /*
 928                          * Avoid reporting two disassociation events that could
 929                          * confuse the core code.
 930                          */
 931                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 932                                    "event when using userspace SME");
 933                         break;
 934                 }
 935                 drv->associated = 0;
 936                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 937                 break;
 938         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 939                 mlme_event_michael_mic_failure(drv, tb);
 940                 break;
 941         default:
 942                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 943                            "(cmd=%d)", gnlh->cmd);
 944                 break;
 945         }
 946
 947         return NL_SKIP;
 948 }
 949
 950
 951 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 952                                              void *sock_ctx)
 953 {
 954         struct nl_cb *cb;
 955         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 956
 957         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 958
 959         cb = nl_cb_clone(drv->nl_cb);
 960         if (!cb)
 961                 return;
 962         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 963         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 964         nl_recvmsgs(drv->nl_handle_event, cb);
 965         nl_cb_put(cb);
 966 }
 967
 968
 969 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 970                                    const char *ifname, int dev_up)
 971 {
 972         struct ifreq ifr;
 973
 974         if (drv->ioctl_sock < 0)
 975                 return -1;
 976
 977         os_memset(&ifr, 0, sizeof(ifr));
 978         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 979
 980         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 981                 perror("ioctl[SIOCGIFFLAGS]");
 982                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 983                            ifname);
 984                 return -1;
 985         }
 986
 987         if (dev_up) {
 988                 if (ifr.ifr_flags & IFF_UP)
 989                         return 0;
 990                 ifr.ifr_flags |= IFF_UP;
 991         } else {
 992                 if (!(ifr.ifr_flags & IFF_UP))
 993                         return 0;
 994                 ifr.ifr_flags &= ~IFF_UP;
 995         }
 996
 997         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 998                 perror("ioctl[SIOCSIFFLAGS]");
 999                 return -1;
1000         }
1001
1002         return 0;
1003 }
1004
1005
1006 /**
1007  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1008  * @priv: driver_nl80211 private data
1009  * @alpha2_arg: country to which to switch to
1010  * Returns: 0 on success, -1 on failure
1011  *
1012  * This asks nl80211 to set the regulatory domain for given
1013  * country ISO / IEC alpha2.
1014  */
1015 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1016 {
1017         struct wpa_driver_nl80211_data *drv = priv;
1018         char alpha2[3];
1019         struct nl_msg *msg;
1020
1021         msg = nlmsg_alloc();
1022         if (!msg)
1023                 return -ENOMEM;
1024
1025         alpha2[0] = alpha2_arg[0];
1026         alpha2[1] = alpha2_arg[1];
1027         alpha2[2] = '\0';
1028
1029         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1030                     0, NL80211_CMD_REQ_SET_REG, 0);
1031
1032         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1033         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1034                 return -EINVAL;
1035         return 0;
1036 nla_put_failure:
1037         return -EINVAL;
1038 }
1039
1040
1041 #ifndef HOSTAPD
1042 struct wiphy_info_data {
1043         int max_scan_ssids;
1044         int ap_supported;
1045         int auth_supported;
1046         int connect_supported;
1047 };
1048
1049
1050 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1051 {
1052         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1053         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1054         struct wiphy_info_data *info = arg;
1055
1056         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1057                   genlmsg_attrlen(gnlh, 0), NULL);
1058
1059         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1060                 info->max_scan_ssids =
1061                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1062
1063         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1064                 struct nlattr *nl_mode;
1065                 int i;
1066                 nla_for_each_nested(nl_mode,
1067                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1068                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1069                                 info->ap_supported = 1;
1070                                 break;
1071                         }
1072                 }
1073         }
1074
1075         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1076                 struct nlattr *nl_cmd;
1077                 int i;
1078
1079                 nla_for_each_nested(nl_cmd,
1080                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1081                         u32 cmd = nla_get_u32(nl_cmd);
1082                         if (cmd == NL80211_CMD_AUTHENTICATE)
1083                                 info->auth_supported = 1;
1084                         else if (cmd == NL80211_CMD_CONNECT)
1085                                 info->connect_supported = 1;
1086                 }
1087         }
1088
1089         return NL_SKIP;
1090 }
1091
1092
1093 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1094                                        struct wiphy_info_data *info)
1095 {
1096         struct nl_msg *msg;
1097
1098         os_memset(info, 0, sizeof(*info));
1099         msg = nlmsg_alloc();
1100         if (!msg)
1101                 return -1;
1102
1103         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1104                     0, NL80211_CMD_GET_WIPHY, 0);
1105
1106         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1107
1108         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1109                 return 0;
1110         msg = NULL;
1111 nla_put_failure:
1112         nlmsg_free(msg);
1113         return -1;
1114 }
1115
1116
1117 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1118 {
1119         struct wiphy_info_data info;
1120         if (wpa_driver_nl80211_get_info(drv, &info))
1121                 return -1;
1122         drv->has_capability = 1;
1123         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1124         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1125                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1126                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1127                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1128         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1129                 WPA_DRIVER_CAPA_ENC_WEP104 |
1130                 WPA_DRIVER_CAPA_ENC_TKIP |
1131                 WPA_DRIVER_CAPA_ENC_CCMP;
1132
1133         drv->capa.max_scan_ssids = info.max_scan_ssids;
1134         if (info.ap_supported)
1135                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1136
1137         if (info.auth_supported)
1138                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1139         else if (!info.connect_supported) {
1140                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1141                            "authentication/association or connect commands");
1142                 return -1;
1143         }
1144
1145         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1146
1147         return 0;
1148 }
1149 #endif /* HOSTAPD */
1150
1151
1152 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1153                                       void *ctx)
1154 {
1155         int ret;
1156
1157         /* Initialize generic netlink and nl80211 */
1158
1159         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1160         if (drv->nl_cb == NULL) {
1161                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1162                            "callbacks");
1163                 goto err1;
1164         }
1165
1166         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1167         if (drv->nl_handle == NULL) {
1168                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1169                            "callbacks");
1170                 goto err2;
1171         }
1172
1173         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1174         if (drv->nl_handle_event == NULL) {
1175                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1176                            "callbacks (event)");
1177                 goto err2b;
1178         }
1179
1180         if (genl_connect(drv->nl_handle)) {
1181                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1182                            "netlink");
1183                 goto err3;
1184         }
1185
1186         if (genl_connect(drv->nl_handle_event)) {
1187                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1188                            "netlink (event)");
1189                 goto err3;
1190         }
1191
1192 #ifdef CONFIG_LIBNL20
1193         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1194                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1195                            "netlink cache");
1196                 goto err3;
1197         }
1198         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1199             0) {
1200                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1201                            "netlink cache (event)");
1202                 goto err3b;
1203         }
1204 #else /* CONFIG_LIBNL20 */
1205         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1206         if (drv->nl_cache == NULL) {
1207                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1208                            "netlink cache");
1209                 goto err3;
1210         }
1211         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1212         if (drv->nl_cache_event == NULL) {
1213                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1214                            "netlink cache (event)");
1215                 goto err3b;
1216         }
1217 #endif /* CONFIG_LIBNL20 */
1218
1219         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1220         if (drv->nl80211 == NULL) {
1221                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1222                            "found");
1223                 goto err4;
1224         }
1225
1226         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1227         if (ret >= 0)
1228                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1229         if (ret < 0) {
1230                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1231                            "membership for scan events: %d (%s)",
1232                            ret, strerror(-ret));
1233                 goto err4;
1234         }
1235
1236         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1237         if (ret >= 0)
1238                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1239         if (ret < 0) {
1240                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1241                            "membership for mlme events: %d (%s)",
1242                            ret, strerror(-ret));
1243                 goto err4;
1244         }
1245
1246         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1247                                  wpa_driver_nl80211_event_receive, drv, ctx);
1248
1249         return 0;
1250
1251 err4:
1252         nl_cache_free(drv->nl_cache_event);
1253 err3b:
1254         nl_cache_free(drv->nl_cache);
1255 err3:
1256         nl_handle_destroy(drv->nl_handle_event);
1257 err2b:
1258         nl_handle_destroy(drv->nl_handle);
1259 err2:
1260         nl_cb_put(drv->nl_cb);
1261 err1:
1262         return -1;
1263 }
1264
1265
1266 static int wpa_driver_nl80211_init_link_events(
1267         struct wpa_driver_nl80211_data *drv)
1268 {
1269 #ifdef HOSTAPD
1270         return 0;
1271 #else /* HOSTAPD */
1272         int s;
1273         struct sockaddr_nl local;
1274
1275         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1276         if (s < 0) {
1277                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1278                 return -1;
1279         }
1280
1281         os_memset(&local, 0, sizeof(local));
1282         local.nl_family = AF_NETLINK;
1283         local.nl_groups = RTMGRP_LINK;
1284         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1285                 perror("bind(netlink)");
1286                 close(s);
1287                 return -1;
1288         }
1289
1290         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1291                                  drv->ctx);
1292         drv->link_event_sock = s;
1293
1294         return 0;
1295 #endif /* HOSTAPD */
1296 }
1297
1298
1299 /**
1300  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1301  * @ctx: context to be used when calling wpa_supplicant functions,
1302  * e.g., wpa_supplicant_event()
1303  * @ifname: interface name, e.g., wlan0
1304  * Returns: Pointer to private data, %NULL on failure
1305  */
1306 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1307 {
1308         struct wpa_driver_nl80211_data *drv;
1309
1310         drv = os_zalloc(sizeof(*drv));
1311         if (drv == NULL)
1312                 return NULL;
1313         drv->ctx = ctx;
1314         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1315         drv->monitor_ifidx = -1;
1316         drv->monitor_sock = -1;
1317         drv->link_event_sock = -1;
1318         drv->ioctl_sock = -1;
1319
1320         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1321                 os_free(drv);
1322                 return NULL;
1323         }
1324
1325         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1326         if (drv->ioctl_sock < 0) {
1327                 perror("socket(PF_INET,SOCK_DGRAM)");
1328                 goto failed;
1329         }
1330
1331         if (wpa_driver_nl80211_init_link_events(drv) ||
1332             wpa_driver_nl80211_finish_drv_init(drv))
1333                 goto failed;
1334
1335         return drv;
1336
1337 failed:
1338         if (drv->link_event_sock >= 0) {
1339                 eloop_unregister_read_sock(drv->link_event_sock);
1340                 close(drv->link_event_sock);
1341         }
1342         if (drv->ioctl_sock >= 0)
1343                 close(drv->ioctl_sock);
1344
1345         genl_family_put(drv->nl80211);
1346         nl_cache_free(drv->nl_cache);
1347         nl_handle_destroy(drv->nl_handle);
1348         nl_cb_put(drv->nl_cb);
1349
1350         os_free(drv);
1351         return NULL;
1352 }
1353
1354
1355 static int
1356 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1357 {
1358         drv->ifindex = if_nametoindex(drv->ifname);
1359
1360 #ifndef HOSTAPD
1361         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1362                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1363                            "use managed mode");
1364         }
1365
1366         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1367                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1368                            "UP", drv->ifname);
1369                 return -1;
1370         }
1371
1372         if (wpa_driver_nl80211_capa(drv))
1373                 return -1;
1374
1375         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1376 #endif /* HOSTAPD */
1377
1378         return 0;
1379 }
1380
1381
1382 #ifdef HOSTAPD
1383 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1384 {
1385         struct i802_bss *bss, *prev;
1386         bss = drv->bss.next;
1387         while (bss) {
1388                 prev = bss;
1389                 bss = bss->next;
1390                 os_free(bss);
1391         }
1392 }
1393 #endif /* HOSTAPD */
1394
1395
1396 #if defined(CONFIG_AP) || defined(HOSTAPD)
1397 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1398 {
1399         struct nl_msg *msg;
1400
1401         msg = nlmsg_alloc();
1402         if (!msg)
1403                 return -ENOMEM;
1404
1405         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1406                     0, NL80211_CMD_DEL_BEACON, 0);
1407         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1408
1409         return send_and_recv_msgs(drv, msg, NULL, NULL);
1410  nla_put_failure:
1411         return -ENOBUFS;
1412 }
1413 #endif /* CONFIG_AP || HOSTAPD */
1414
1415
1416 /**
1417  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1418  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1419  *
1420  * Shut down driver interface and processing of driver events. Free
1421  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1422  */
1423 static void wpa_driver_nl80211_deinit(void *priv)
1424 {
1425         struct wpa_driver_nl80211_data *drv = priv;
1426
1427 #if defined(CONFIG_AP) || defined(HOSTAPD)
1428         nl80211_remove_monitor_interface(drv);
1429         if (drv->monitor_sock >= 0) {
1430                 eloop_unregister_read_sock(drv->monitor_sock);
1431                 close(drv->monitor_sock);
1432         }
1433
1434         if (drv->nlmode == NL80211_IFTYPE_AP)
1435                 wpa_driver_nl80211_del_beacon(drv);
1436 #endif /* CONFIG_AP || HOSTAPD */
1437
1438 #ifdef HOSTAPD
1439         if (drv->last_freq_ht) {
1440                 /* Clear HT flags from the driver */
1441                 struct hostapd_freq_params freq;
1442                 os_memset(&freq, 0, sizeof(freq));
1443                 freq.freq = drv->last_freq;
1444                 i802_set_freq(priv, &freq);
1445         }
1446
1447         if (drv->eapol_sock >= 0) {
1448                 eloop_unregister_read_sock(drv->eapol_sock);
1449                 close(drv->eapol_sock);
1450         }
1451
1452         if (drv->if_indices != drv->default_if_indices)
1453                 os_free(drv->if_indices);
1454
1455         wpa_driver_nl80211_free_bss(drv);
1456 #else /* HOSTAPD */
1457
1458         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1459
1460         if (drv->link_event_sock >= 0) {
1461                 eloop_unregister_read_sock(drv->link_event_sock);
1462                 close(drv->link_event_sock);
1463         }
1464 #endif /* HOSTAPD */
1465
1466         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1467
1468         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1469         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1470
1471         if (drv->ioctl_sock >= 0)
1472                 close(drv->ioctl_sock);
1473
1474         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1475         genl_family_put(drv->nl80211);
1476         nl_cache_free(drv->nl_cache);
1477         nl_cache_free(drv->nl_cache_event);
1478         nl_handle_destroy(drv->nl_handle);
1479         nl_handle_destroy(drv->nl_handle_event);
1480         nl_cb_put(drv->nl_cb);
1481
1482         os_free(drv);
1483 }
1484
1485
1486 /**
1487  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1488  * @eloop_ctx: Driver private data
1489  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1490  *
1491  * This function can be used as registered timeout when starting a scan to
1492  * generate a scan completed event if the driver does not report this.
1493  */
1494 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1495 {
1496         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1497         if (drv->ap_scan_as_station) {
1498                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1499                 drv->ap_scan_as_station = 0;
1500         }
1501         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1502         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1503 }
1504
1505
1506 /**
1507  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1508  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1509  * @params: Scan parameters
1510  * Returns: 0 on success, -1 on failure
1511  */
1512 static int wpa_driver_nl80211_scan(void *priv,
1513                                    struct wpa_driver_scan_params *params)
1514 {
1515         struct wpa_driver_nl80211_data *drv = priv;
1516         int ret = 0, timeout;
1517         struct nl_msg *msg, *ssids, *freqs;
1518         size_t i;
1519
1520         msg = nlmsg_alloc();
1521         ssids = nlmsg_alloc();
1522         freqs = nlmsg_alloc();
1523         if (!msg || !ssids || !freqs) {
1524                 nlmsg_free(msg);
1525                 nlmsg_free(ssids);
1526                 nlmsg_free(freqs);
1527                 return -1;
1528         }
1529
1530         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1531                     NL80211_CMD_TRIGGER_SCAN, 0);
1532
1533         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1534
1535         for (i = 0; i < params->num_ssids; i++) {
1536                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1537                         params->ssids[i].ssid);
1538         }
1539         if (params->num_ssids)
1540                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1541
1542         if (params->extra_ies) {
1543                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1544                         params->extra_ies);
1545         }
1546
1547         if (params->freqs) {
1548                 for (i = 0; params->freqs[i]; i++)
1549                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1550                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1551         }
1552
1553         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1554         msg = NULL;
1555         if (ret) {
1556                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1557                            "(%s)", ret, strerror(-ret));
1558 #ifdef HOSTAPD
1559                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1560                         /*
1561                          * mac80211 does not allow scan requests in AP mode, so
1562                          * try to do this in station mode.
1563                          */
1564                         if (wpa_driver_nl80211_set_mode(drv,
1565                                                         IEEE80211_MODE_INFRA))
1566                                 goto nla_put_failure;
1567
1568                         if (wpa_driver_nl80211_scan(drv, params)) {
1569                                 wpa_driver_nl80211_set_mode(drv,
1570                                                             IEEE80211_MODE_AP);
1571                                 goto nla_put_failure;
1572                         }
1573
1574                         /* Restore AP mode when processing scan results */
1575                         drv->ap_scan_as_station = 1;
1576                         ret = 0;
1577                 } else
1578                         goto nla_put_failure;
1579 #else /* HOSTAPD */
1580                 goto nla_put_failure;
1581 #endif /* HOSTAPD */
1582         }
1583
1584         /* Not all drivers generate "scan completed" wireless event, so try to
1585          * read results after a timeout. */
1586         timeout = 10;
1587         if (drv->scan_complete_events) {
1588                 /*
1589                  * The driver seems to deliver events to notify when scan is
1590                  * complete, so use longer timeout to avoid race conditions
1591                  * with scanning and following association request.
1592                  */
1593                 timeout = 30;
1594         }
1595         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1596                    "seconds", ret, timeout);
1597         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1598         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1599                                drv, drv->ctx);
1600
1601 nla_put_failure:
1602         nlmsg_free(ssids);
1603         nlmsg_free(msg);
1604         nlmsg_free(freqs);
1605         return ret;
1606 }
1607
1608
1609 static int bss_info_handler(struct nl_msg *msg, void *arg)
1610 {
1611         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1612         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1613         struct nlattr *bss[NL80211_BSS_MAX + 1];
1614         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1615                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1616                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1617                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1618                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1619                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1620                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1621                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1622                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1623                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1624         };
1625         struct wpa_scan_results *res = arg;
1626         struct wpa_scan_res **tmp;
1627         struct wpa_scan_res *r;
1628         const u8 *ie;
1629         size_t ie_len;
1630
1631         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1632                   genlmsg_attrlen(gnlh, 0), NULL);
1633         if (!tb[NL80211_ATTR_BSS])
1634                 return NL_SKIP;
1635         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1636                              bss_policy))
1637                 return NL_SKIP;
1638         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1639                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1640                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1641         } else {
1642                 ie = NULL;
1643                 ie_len = 0;
1644         }
1645
1646         r = os_zalloc(sizeof(*r) + ie_len);
1647         if (r == NULL)
1648                 return NL_SKIP;
1649         if (bss[NL80211_BSS_BSSID])
1650                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1651                           ETH_ALEN);
1652         if (bss[NL80211_BSS_FREQUENCY])
1653                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1654         if (bss[NL80211_BSS_BEACON_INTERVAL])
1655                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1656         if (bss[NL80211_BSS_CAPABILITY])
1657                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1658         r->flags |= WPA_SCAN_NOISE_INVALID;
1659         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1660                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1661                 r->level /= 100; /* mBm to dBm */
1662                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1663         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1664                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1665                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1666         } else
1667                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1668         if (bss[NL80211_BSS_TSF])
1669                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1670         if (bss[NL80211_BSS_SEEN_MS_AGO])
1671                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1672         r->ie_len = ie_len;
1673         if (ie)
1674                 os_memcpy(r + 1, ie, ie_len);
1675
1676         tmp = os_realloc(res->res,
1677                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1678         if (tmp == NULL) {
1679                 os_free(r);
1680                 return NL_SKIP;
1681         }
1682         tmp[res->num++] = r;
1683         res->res = tmp;
1684
1685         return NL_SKIP;
1686 }
1687
1688
1689 /**
1690  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1691  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1692  * Returns: Scan results on success, -1 on failure
1693  */
1694 static struct wpa_scan_results *
1695 wpa_driver_nl80211_get_scan_results(void *priv)
1696 {
1697         struct wpa_driver_nl80211_data *drv = priv;
1698         struct nl_msg *msg;
1699         struct wpa_scan_results *res;
1700         int ret;
1701
1702         res = os_zalloc(sizeof(*res));
1703         if (res == NULL)
1704                 return 0;
1705         msg = nlmsg_alloc();
1706         if (!msg)
1707                 goto nla_put_failure;
1708
1709         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1710                     NL80211_CMD_GET_SCAN, 0);
1711         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1712
1713         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1714         msg = NULL;
1715         if (ret == 0) {
1716                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1717                            (unsigned long) res->num);
1718                 return res;
1719         }
1720         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1721                    "(%s)", ret, strerror(-ret));
1722 nla_put_failure:
1723         nlmsg_free(msg);
1724         wpa_scan_results_free(res);
1725         return NULL;
1726 }
1727
1728
1729 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1730                                       wpa_alg alg, const u8 *addr, int key_idx,
1731                                       int set_tx,
1732                                       const u8 *seq, size_t seq_len,
1733                                       const u8 *key, size_t key_len)
1734 {
1735         struct wpa_driver_nl80211_data *drv = priv;
1736         int ifindex = if_nametoindex(ifname);
1737         struct nl_msg *msg;
1738         int ret;
1739
1740         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1741                    "set_tx=%d seq_len=%lu key_len=%lu",
1742                    __func__, ifindex, alg, addr, key_idx, set_tx,
1743                    (unsigned long) seq_len, (unsigned long) key_len);
1744
1745         msg = nlmsg_alloc();
1746         if (!msg)
1747                 return -ENOMEM;
1748
1749         if (alg == WPA_ALG_NONE) {
1750                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1751                             0, NL80211_CMD_DEL_KEY, 0);
1752         } else {
1753                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1754                             0, NL80211_CMD_NEW_KEY, 0);
1755                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1756                 switch (alg) {
1757                 case WPA_ALG_WEP:
1758                         if (key_len == 5)
1759                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1760                                             WLAN_CIPHER_SUITE_WEP40);
1761                         else
1762                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1763                                             WLAN_CIPHER_SUITE_WEP104);
1764                         break;
1765                 case WPA_ALG_TKIP:
1766                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1767                                     WLAN_CIPHER_SUITE_TKIP);
1768                         break;
1769                 case WPA_ALG_CCMP:
1770                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1771                                     WLAN_CIPHER_SUITE_CCMP);
1772                         break;
1773                 case WPA_ALG_IGTK:
1774                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1775                                     WLAN_CIPHER_SUITE_AES_CMAC);
1776                         break;
1777                 default:
1778                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1779                                    "algorithm %d", __func__, alg);
1780                         nlmsg_free(msg);
1781                         return -1;
1782                 }
1783         }
1784
1785         if (seq && seq_len)
1786                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1787
1788         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1789         {
1790                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1791                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1792         }
1793         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1794         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1795
1796         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1797         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1798                 ret = 0;
1799         if (ret)
1800                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1801                            ret, strerror(-ret));
1802
1803         /*
1804          * If we failed or don't need to set the default TX key (below),
1805          * we're done here.
1806          */
1807         if (ret || !set_tx || alg == WPA_ALG_NONE)
1808                 return ret;
1809 #ifdef HOSTAPD /* FIX: is this needed? */
1810         if (addr)
1811                 return ret;
1812 #endif /* HOSTAPD */
1813
1814         msg = nlmsg_alloc();
1815         if (!msg)
1816                 return -ENOMEM;
1817
1818         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1819                     0, NL80211_CMD_SET_KEY, 0);
1820         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1821         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1822         if (alg == WPA_ALG_IGTK)
1823                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1824         else
1825                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1826
1827         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1828         if (ret == -ENOENT)
1829                 ret = 0;
1830         if (ret)
1831                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1832                            "err=%d %s)", ret, strerror(-ret));
1833         return ret;
1834
1835 nla_put_failure:
1836         return -ENOBUFS;
1837 }
1838
1839
1840 static int nl_add_key(struct nl_msg *msg, wpa_alg alg,
1841                       int key_idx, int defkey,
1842                       const u8 *seq, size_t seq_len,
1843                       const u8 *key, size_t key_len)
1844 {
1845         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1846         if (!key_attr)
1847                 return -1;
1848
1849         if (defkey && alg == WPA_ALG_IGTK)
1850                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1851         else if (defkey)
1852                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1853
1854         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1855
1856         switch (alg) {
1857         case WPA_ALG_WEP:
1858                 if (key_len == 5)
1859                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1860                                     WLAN_CIPHER_SUITE_WEP40);
1861                 else
1862                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1863                                     WLAN_CIPHER_SUITE_WEP104);
1864                 break;
1865         case WPA_ALG_TKIP:
1866                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1867                 break;
1868         case WPA_ALG_CCMP:
1869                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1870                 break;
1871         case WPA_ALG_IGTK:
1872                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1873                             WLAN_CIPHER_SUITE_AES_CMAC);
1874                 break;
1875         default:
1876                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1877                            "algorithm %d", __func__, alg);
1878                 return -1;
1879         }
1880
1881         if (seq && seq_len)
1882                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1883
1884         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1885
1886         nla_nest_end(msg, key_attr);
1887
1888         return 0;
1889  nla_put_failure:
1890         return -1;
1891 }
1892
1893
1894 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1895                                  struct nl_msg *msg)
1896 {
1897         int i, privacy = 0;
1898         struct nlattr *nl_keys, *nl_key;
1899
1900         for (i = 0; i < 4; i++) {
1901                 if (!params->wep_key[i])
1902                         continue;
1903                 privacy = 1;
1904                 break;
1905         }
1906         if (!privacy)
1907                 return 0;
1908
1909         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1910
1911         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1912         if (!nl_keys)
1913                 goto nla_put_failure;
1914
1915         for (i = 0; i < 4; i++) {
1916                 if (!params->wep_key[i])
1917                         continue;
1918
1919                 nl_key = nla_nest_start(msg, i);
1920                 if (!nl_key)
1921                         goto nla_put_failure;
1922
1923                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1924                         params->wep_key[i]);
1925                 if (params->wep_key_len[i] == 5)
1926                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1927                                     WLAN_CIPHER_SUITE_WEP40);
1928                 else
1929                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1930                                     WLAN_CIPHER_SUITE_WEP104);
1931
1932                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1933
1934                 if (i == params->wep_tx_keyidx)
1935                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1936
1937                 nla_nest_end(msg, nl_key);
1938         }
1939         nla_nest_end(msg, nl_keys);
1940
1941         return 0;
1942
1943 nla_put_failure:
1944         return -ENOBUFS;
1945 }
1946
1947
1948 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1949                                    const u8 *addr, int cmd, u16 reason_code)
1950 {
1951         int ret = -1;
1952         struct nl_msg *msg;
1953
1954         msg = nlmsg_alloc();
1955         if (!msg)
1956                 return -1;
1957
1958         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1959
1960         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1961         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1962         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1963
1964         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1965         msg = NULL;
1966         if (ret) {
1967                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1968                            "(%s)", ret, strerror(-ret));
1969                 goto nla_put_failure;
1970         }
1971         ret = 0;
1972
1973 nla_put_failure:
1974         nlmsg_free(msg);
1975         return ret;
1976 }
1977
1978
1979 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
1980                                          const u8 *addr, int reason_code)
1981 {
1982         wpa_printf(MSG_DEBUG, "%s", __func__);
1983         drv->associated = 0;
1984         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
1985                                        reason_code);
1986 }
1987
1988
1989 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1990                                              int reason_code)
1991 {
1992         struct wpa_driver_nl80211_data *drv = priv;
1993         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1994                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1995         wpa_printf(MSG_DEBUG, "%s", __func__);
1996         drv->associated = 0;
1997         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1998                                        reason_code);
1999 }
2000
2001
2002 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2003                                            int reason_code)
2004 {
2005         struct wpa_driver_nl80211_data *drv = priv;
2006         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2007                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2008         wpa_printf(MSG_DEBUG, "%s", __func__);
2009         drv->associated = 0;
2010         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2011                                        reason_code);
2012 }
2013
2014
2015 static int wpa_driver_nl80211_authenticate(
2016         void *priv, struct wpa_driver_auth_params *params)
2017 {
2018         struct wpa_driver_nl80211_data *drv = priv;
2019         int ret = -1, i;
2020         struct nl_msg *msg;
2021         enum nl80211_auth_type type;
2022         int count = 0;
2023
2024         drv->associated = 0;
2025
2026 retry:
2027         msg = nlmsg_alloc();
2028         if (!msg)
2029                 return -1;
2030
2031         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2032                    drv->ifindex);
2033
2034         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2035                     NL80211_CMD_AUTHENTICATE, 0);
2036
2037         for (i = 0; i < 4; i++) {
2038                 if (!params->wep_key[i])
2039                         continue;
2040                 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
2041                                            i,
2042                                            i == params->wep_tx_keyidx, NULL, 0,
2043                                            params->wep_key[i],
2044                                            params->wep_key_len[i]);
2045                 if (params->wep_tx_keyidx != i)
2046                         continue;
2047                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2048                                params->wep_key[i], params->wep_key_len[i])) {
2049                         nlmsg_free(msg);
2050                         return -1;
2051                 }
2052         }
2053
2054         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2055         if (params->bssid) {
2056                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2057                            MAC2STR(params->bssid));
2058                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2059         }
2060         if (params->freq) {
2061                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2062                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2063         }
2064         if (params->ssid) {
2065                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2066                                   params->ssid, params->ssid_len);
2067                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2068                         params->ssid);
2069         }
2070         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2071         if (params->ie)
2072                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2073         /*
2074          * TODO: if multiple auth_alg options enabled, try them one by one if
2075          * the AP rejects authentication due to unknown auth alg
2076          */
2077         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2078                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2079         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2080                 type = NL80211_AUTHTYPE_SHARED_KEY;
2081         else if (params->auth_alg & AUTH_ALG_LEAP)
2082                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2083         else if (params->auth_alg & AUTH_ALG_FT)
2084                 type = NL80211_AUTHTYPE_FT;
2085         else
2086                 goto nla_put_failure;
2087         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2088         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2089
2090         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2091         msg = NULL;
2092         if (ret) {
2093                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2094                            "(%s)", ret, strerror(-ret));
2095                 count++;
2096                 if (ret == -EALREADY && count == 1 && params->bssid) {
2097                         /*
2098                          * mac80211 does not currently accept new
2099                          * authentication if we are already authenticated. As a
2100                          * workaround, force deauthentication and try again.
2101                          */
2102                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2103                                    "after forced deauthentication");
2104                         wpa_driver_nl80211_deauthenticate(
2105                                 drv, params->bssid,
2106                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2107                         nlmsg_free(msg);
2108                         goto retry;
2109                 }
2110                 goto nla_put_failure;
2111         }
2112         ret = 0;
2113         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2114                    "successfully");
2115
2116 nla_put_failure:
2117         nlmsg_free(msg);
2118         return ret;
2119 }
2120
2121
2122 #if defined(CONFIG_AP) || defined(HOSTAPD)
2123
2124 struct phy_info_arg {
2125         u16 *num_modes;
2126         struct hostapd_hw_modes *modes;
2127 };
2128
2129 static int phy_info_handler(struct nl_msg *msg, void *arg)
2130 {
2131         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2132         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2133         struct phy_info_arg *phy_info = arg;
2134
2135         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2136
2137         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2138         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2139                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2140                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2141                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2142                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2143                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2144                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2145         };
2146
2147         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2148         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2149                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2150                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2151         };
2152
2153         struct nlattr *nl_band;
2154         struct nlattr *nl_freq;
2155         struct nlattr *nl_rate;
2156         int rem_band, rem_freq, rem_rate;
2157         struct hostapd_hw_modes *mode;
2158         int idx, mode_is_set;
2159
2160         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2161                   genlmsg_attrlen(gnlh, 0), NULL);
2162
2163         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2164                 return NL_SKIP;
2165
2166         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2167                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2168                 if (!mode)
2169                         return NL_SKIP;
2170                 phy_info->modes = mode;
2171
2172                 mode_is_set = 0;
2173
2174                 mode = &phy_info->modes[*(phy_info->num_modes)];
2175                 memset(mode, 0, sizeof(*mode));
2176                 *(phy_info->num_modes) += 1;
2177
2178                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2179                           nla_len(nl_band), NULL);
2180
2181                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2182                         mode->ht_capab = nla_get_u16(
2183                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2184                 }
2185
2186                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2187                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2188                         u8 *mcs;
2189                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2190                         os_memcpy(mode->mcs_set, mcs, 16);
2191                 }
2192
2193                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2194                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2195                                   nla_len(nl_freq), freq_policy);
2196                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2197                                 continue;
2198                         mode->num_channels++;
2199                 }
2200
2201                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
2202                 if (!mode->channels)
2203                         return NL_SKIP;
2204
2205                 idx = 0;
2206
2207                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2208                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2209                                   nla_len(nl_freq), freq_policy);
2210                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2211                                 continue;
2212
2213                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2214                         mode->channels[idx].flag = 0;
2215
2216                         if (!mode_is_set) {
2217                                 /* crude heuristic */
2218                                 if (mode->channels[idx].freq < 4000)
2219                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2220                                 else
2221                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2222                                 mode_is_set = 1;
2223                         }
2224
2225                         /* crude heuristic */
2226                         if (mode->channels[idx].freq < 4000)
2227                                 if (mode->channels[idx].freq == 2484)
2228                                         mode->channels[idx].chan = 14;
2229                                 else
2230                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2231                         else
2232                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2233
2234                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2235                                 mode->channels[idx].flag |=
2236                                         HOSTAPD_CHAN_DISABLED;
2237                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2238                                 mode->channels[idx].flag |=
2239                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2240                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2241                                 mode->channels[idx].flag |=
2242                                         HOSTAPD_CHAN_NO_IBSS;
2243                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2244                                 mode->channels[idx].flag |=
2245                                         HOSTAPD_CHAN_RADAR;
2246
2247                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2248                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2249                                 mode->channels[idx].max_tx_power =
2250                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2251
2252                         idx++;
2253                 }
2254
2255                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2256                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2257                                   nla_len(nl_rate), rate_policy);
2258                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2259                                 continue;
2260                         mode->num_rates++;
2261                 }
2262
2263                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
2264                 if (!mode->rates)
2265                         return NL_SKIP;
2266
2267                 idx = 0;
2268
2269                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2270                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2271                                   nla_len(nl_rate), rate_policy);
2272                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2273                                 continue;
2274                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2275
2276                         /* crude heuristic */
2277                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2278                             mode->rates[idx].rate > 200)
2279                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2280
2281                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2282                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
2283
2284                         idx++;
2285                 }
2286         }
2287
2288         return NL_SKIP;
2289 }
2290
2291 static struct hostapd_hw_modes *
2292 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2293 {
2294         u16 m;
2295         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2296         int i, mode11g_idx = -1;
2297
2298         /* If only 802.11g mode is included, use it to construct matching
2299          * 802.11b mode data. */
2300
2301         for (m = 0; m < *num_modes; m++) {
2302                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2303                         return modes; /* 802.11b already included */
2304                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2305                         mode11g_idx = m;
2306         }
2307
2308         if (mode11g_idx < 0)
2309                 return modes; /* 2.4 GHz band not supported at all */
2310
2311         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2312         if (nmodes == NULL)
2313                 return modes; /* Could not add 802.11b mode */
2314
2315         mode = &nmodes[*num_modes];
2316         os_memset(mode, 0, sizeof(*mode));
2317         (*num_modes)++;
2318         modes = nmodes;
2319
2320         mode->mode = HOSTAPD_MODE_IEEE80211B;
2321
2322         mode11g = &modes[mode11g_idx];
2323         mode->num_channels = mode11g->num_channels;
2324         mode->channels = os_malloc(mode11g->num_channels *
2325                                    sizeof(struct hostapd_channel_data));
2326         if (mode->channels == NULL) {
2327                 (*num_modes)--;
2328                 return modes; /* Could not add 802.11b mode */
2329         }
2330         os_memcpy(mode->channels, mode11g->channels,
2331                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2332
2333         mode->num_rates = 0;
2334         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2335         if (mode->rates == NULL) {
2336                 os_free(mode->channels);
2337                 (*num_modes)--;
2338                 return modes; /* Could not add 802.11b mode */
2339         }
2340
2341         for (i = 0; i < mode11g->num_rates; i++) {
2342                 if (mode11g->rates[i].rate > 110 ||
2343                     mode11g->rates[i].flags &
2344                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2345                         continue;
2346                 mode->rates[mode->num_rates] = mode11g->rates[i];
2347                 mode->num_rates++;
2348                 if (mode->num_rates == 4)
2349                         break;
2350         }
2351
2352         if (mode->num_rates == 0) {
2353                 os_free(mode->channels);
2354                 os_free(mode->rates);
2355                 (*num_modes)--;
2356                 return modes; /* No 802.11b rates */
2357         }
2358
2359         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2360                    "information");
2361
2362         return modes;
2363 }
2364
2365
2366 static struct hostapd_hw_modes *
2367 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2368 {
2369         struct wpa_driver_nl80211_data *drv = priv;
2370         struct nl_msg *msg;
2371         struct phy_info_arg result = {
2372                 .num_modes = num_modes,
2373                 .modes = NULL,
2374         };
2375
2376         *num_modes = 0;
2377         *flags = 0;
2378
2379         msg = nlmsg_alloc();
2380         if (!msg)
2381                 return NULL;
2382
2383         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2384                     0, NL80211_CMD_GET_WIPHY, 0);
2385
2386         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2387
2388         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2389                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2390  nla_put_failure:
2391         return NULL;
2392 }
2393
2394
2395 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2396                                          const void *data, size_t len,
2397                                          int encrypt)
2398 {
2399         __u8 rtap_hdr[] = {
2400                 0x00, 0x00, /* radiotap version */
2401                 0x0e, 0x00, /* radiotap length */
2402                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2403                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2404                 0x00,       /* padding */
2405                 0x00, 0x00, /* RX and TX flags to indicate that */
2406                 0x00, 0x00, /* this is the injected frame directly */
2407         };
2408         struct iovec iov[2] = {
2409                 {
2410                         .iov_base = &rtap_hdr,
2411                         .iov_len = sizeof(rtap_hdr),
2412                 },
2413                 {
2414                         .iov_base = (void *) data,
2415                         .iov_len = len,
2416                 }
2417         };
2418         struct msghdr msg = {
2419                 .msg_name = NULL,
2420                 .msg_namelen = 0,
2421                 .msg_iov = iov,
2422                 .msg_iovlen = 2,
2423                 .msg_control = NULL,
2424                 .msg_controllen = 0,
2425                 .msg_flags = 0,
2426         };
2427
2428         if (encrypt)
2429                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2430
2431         return sendmsg(drv->monitor_sock, &msg, 0);
2432 }
2433
2434
2435 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2436                                         size_t data_len)
2437 {
2438         struct wpa_driver_nl80211_data *drv = priv;
2439         struct ieee80211_mgmt *mgmt;
2440         int encrypt = 1;
2441         u16 fc;
2442
2443         mgmt = (struct ieee80211_mgmt *) data;
2444         fc = le_to_host16(mgmt->frame_control);
2445
2446         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2447             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2448                 /*
2449                  * Only one of the authentication frame types is encrypted.
2450                  * In order for static WEP encryption to work properly (i.e.,
2451                  * to not encrypt the frame), we need to tell mac80211 about
2452                  * the frames that must not be encrypted.
2453                  */
2454                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2455                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2456                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2457                         encrypt = 0;
2458         }
2459
2460         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2461 }
2462
2463 #endif /* CONFIG_AP || HOSTAPD */
2464
2465
2466 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2467                                          const u8 *head, size_t head_len,
2468                                          const u8 *tail, size_t tail_len,
2469                                          int dtim_period, int beacon_int)
2470 {
2471         struct wpa_driver_nl80211_data *drv = priv;
2472         struct nl_msg *msg;
2473         u8 cmd = NL80211_CMD_NEW_BEACON;
2474         int ret;
2475         int beacon_set;
2476         int ifindex = if_nametoindex(ifname);
2477 #ifdef HOSTAPD
2478         struct i802_bss *bss;
2479
2480         bss = get_bss(drv, ifindex);
2481         if (bss == NULL)
2482                 return -ENOENT;
2483         beacon_set = bss->beacon_set;
2484 #else /* HOSTAPD */
2485         beacon_set = drv->beacon_set;
2486 #endif /* HOSTAPD */
2487
2488         msg = nlmsg_alloc();
2489         if (!msg)
2490                 return -ENOMEM;
2491
2492         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2493                    beacon_set);
2494         if (beacon_set)
2495                 cmd = NL80211_CMD_SET_BEACON;
2496
2497         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2498                     0, cmd, 0);
2499         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2500         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2501         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2502         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2503         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2504
2505         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2506         if (ret) {
2507                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2508                            ret, strerror(-ret));
2509         } else {
2510 #ifdef HOSTAPD
2511                 bss->beacon_set = 1;
2512 #else /* HOSTAPD */
2513                 drv->beacon_set = 1;
2514 #endif /* HOSTAPD */
2515         }
2516         return ret;
2517  nla_put_failure:
2518         return -ENOBUFS;
2519 }
2520
2521
2522 #if defined(CONFIG_AP) || defined(HOSTAPD)
2523
2524 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2525                                        int freq, int ht_enabled,
2526                                        int sec_channel_offset)
2527 {
2528         struct nl_msg *msg;
2529         int ret;
2530
2531         msg = nlmsg_alloc();
2532         if (!msg)
2533                 return -1;
2534
2535         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2536                     NL80211_CMD_SET_WIPHY, 0);
2537
2538         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2539         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2540         if (ht_enabled) {
2541                 switch (sec_channel_offset) {
2542                 case -1:
2543                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2544                                     NL80211_CHAN_HT40MINUS);
2545                         break;
2546                 case 1:
2547                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2548                                     NL80211_CHAN_HT40PLUS);
2549                         break;
2550                 default:
2551                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2552                                     NL80211_CHAN_HT20);
2553                         break;
2554                 }
2555         }
2556
2557         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2558         if (ret == 0)
2559                 return 0;
2560         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2561                    "%d (%s)", freq, ret, strerror(-ret));
2562 nla_put_failure:
2563         return -1;
2564 }
2565
2566
2567 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2568                                       struct hostapd_sta_add_params *params)
2569 {
2570         struct wpa_driver_nl80211_data *drv = priv;
2571         struct nl_msg *msg;
2572         int ret = -ENOBUFS;
2573
2574         msg = nlmsg_alloc();
2575         if (!msg)
2576                 return -ENOMEM;
2577
2578         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2579                     0, NL80211_CMD_NEW_STATION, 0);
2580
2581         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2582         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2583         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2584         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2585                 params->supp_rates);
2586         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2587                     params->listen_interval);
2588
2589 #ifdef CONFIG_IEEE80211N
2590         if (params->ht_capabilities) {
2591                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2592                         params->ht_capabilities->length,
2593                         &params->ht_capabilities->data);
2594         }
2595 #endif /* CONFIG_IEEE80211N */
2596
2597         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2598         if (ret)
2599                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2600                            "result: %d (%s)", ret, strerror(-ret));
2601         if (ret == -EEXIST)
2602                 ret = 0;
2603  nla_put_failure:
2604         return ret;
2605 }
2606
2607
2608 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2609 {
2610         struct wpa_driver_nl80211_data *drv = priv;
2611         struct nl_msg *msg;
2612         int ret;
2613
2614         msg = nlmsg_alloc();
2615         if (!msg)
2616                 return -ENOMEM;
2617
2618         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2619                     0, NL80211_CMD_DEL_STATION, 0);
2620
2621         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2622                     if_nametoindex(drv->ifname));
2623         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2624
2625         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2626         if (ret == -ENOENT)
2627                 return 0;
2628         return ret;
2629  nla_put_failure:
2630         return -ENOBUFS;
2631 }
2632
2633
2634 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2635                                  int ifidx)
2636 {
2637         struct nl_msg *msg;
2638
2639 #ifdef HOSTAPD
2640         /* stop listening for EAPOL on this interface */
2641         del_ifidx(drv, ifidx);
2642 #endif /* HOSTAPD */
2643
2644         msg = nlmsg_alloc();
2645         if (!msg)
2646                 goto nla_put_failure;
2647
2648         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2649                     0, NL80211_CMD_DEL_INTERFACE, 0);
2650         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2651
2652         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2653                 return;
2654  nla_put_failure:
2655         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2656                    ifidx);
2657 }
2658
2659
2660 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2661                                      const char *ifname,
2662                                      enum nl80211_iftype iftype,
2663                                      const u8 *addr)
2664 {
2665         struct nl_msg *msg, *flags = NULL;
2666         int ifidx;
2667         int ret = -ENOBUFS;
2668
2669         msg = nlmsg_alloc();
2670         if (!msg)
2671                 return -1;
2672
2673         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2674                     0, NL80211_CMD_NEW_INTERFACE, 0);
2675         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2676         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2677         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2678
2679         if (iftype == NL80211_IFTYPE_MONITOR) {
2680                 int err;
2681
2682                 flags = nlmsg_alloc();
2683                 if (!flags)
2684                         goto nla_put_failure;
2685
2686                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2687
2688                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2689
2690                 nlmsg_free(flags);
2691
2692                 if (err)
2693                         goto nla_put_failure;
2694         }
2695
2696         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2697         if (ret) {
2698  nla_put_failure:
2699                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2700                            ifname, ret, strerror(-ret));
2701                 return ret;
2702         }
2703
2704         ifidx = if_nametoindex(ifname);
2705
2706         if (ifidx <= 0)
2707                 return -1;
2708
2709 #ifdef HOSTAPD
2710         /* start listening for EAPOL on this interface */
2711         add_ifidx(drv, ifidx);
2712
2713         if (addr && iftype == NL80211_IFTYPE_AP &&
2714             set_ifhwaddr(drv, ifname, addr)) {
2715                 nl80211_remove_iface(drv, ifidx);
2716                 return -1;
2717         }
2718 #endif /* HOSTAPD */
2719
2720         return ifidx;
2721 }
2722 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2723                                 const char *ifname, enum nl80211_iftype iftype,
2724                                 const u8 *addr)
2725 {
2726         int ret;
2727
2728         ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2729
2730         /* if error occured and interface exists already */
2731         if (ret == -ENFILE && if_nametoindex(ifname)) {
2732                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2733
2734                 /* Try to remove the interface that was already there. */
2735                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2736
2737                 /* Try to create the interface again */
2738                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2739         }
2740
2741         return ret;
2742 }
2743
2744 #endif /* CONFIG_AP || HOSTAPD */
2745
2746 #ifdef CONFIG_AP
2747
2748 void ap_tx_status(void *ctx, const u8 *addr,
2749                   const u8 *buf, size_t len, int ack);
2750 void ap_rx_from_unknown_sta(void *ctx, struct ieee80211_hdr *hdr, size_t len);
2751 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2752                 struct hostapd_frame_info *fi);
2753 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2754
2755 #endif /* CONFIG_AP */
2756
2757 #if defined(CONFIG_AP) || defined(HOSTAPD)
2758
2759 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2760 {
2761         struct ieee80211_hdr *hdr;
2762         u16 fc, type, stype;
2763
2764         hdr = (struct ieee80211_hdr *) buf;
2765         fc = le_to_host16(hdr->frame_control);
2766
2767         type = WLAN_FC_GET_TYPE(fc);
2768         stype = WLAN_FC_GET_STYPE(fc);
2769
2770         switch (type) {
2771         case WLAN_FC_TYPE_MGMT:
2772                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2773                            ok ? "ACK" : "fail");
2774 #ifdef HOSTAPD
2775                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2776 #else /* HOSTAPD */
2777                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2778 #endif /* HOSTAPD */
2779                 break;
2780         case WLAN_FC_TYPE_CTRL:
2781                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2782                            ok ? "ACK" : "fail");
2783                 break;
2784         case WLAN_FC_TYPE_DATA:
2785 #ifdef HOSTAPD
2786                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2787 #else /* HOSTAPD */
2788                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2789 #endif /* HOSTAPD */
2790                 break;
2791         default:
2792                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2793                            type);
2794                 break;
2795         }
2796 }
2797
2798
2799 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2800                              struct ieee80211_hdr *hdr, size_t len)
2801 {
2802 #ifdef HOSTAPD
2803         hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2804 #else /* HOSTAPD */
2805         ap_rx_from_unknown_sta(drv->ctx, hdr, len);
2806 #endif /* HOSTAPD */
2807 }
2808
2809
2810 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2811                          u8 *buf, size_t len,
2812                          struct hostapd_frame_info *hfi)
2813 {
2814         struct ieee80211_hdr *hdr;
2815         u16 fc, stype;
2816
2817         hdr = (struct ieee80211_hdr *) buf;
2818         fc = le_to_host16(hdr->frame_control);
2819         stype = WLAN_FC_GET_STYPE(fc);
2820
2821         switch (WLAN_FC_GET_TYPE(fc)) {
2822         case WLAN_FC_TYPE_MGMT:
2823                 if (stype != WLAN_FC_STYPE_BEACON &&
2824                     stype != WLAN_FC_STYPE_PROBE_REQ)
2825                         wpa_printf(MSG_MSGDUMP, "MGMT");
2826 #ifdef HOSTAPD
2827                 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2828 #else /* HOSTAPD */
2829                 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2830 #endif /* HOSTAPD */
2831                 break;
2832         case WLAN_FC_TYPE_CTRL:
2833                 /* can only get here with PS-Poll frames */
2834                 wpa_printf(MSG_DEBUG, "CTRL");
2835                 from_unknown_sta(drv, hdr, len);
2836                 break;
2837         case WLAN_FC_TYPE_DATA:
2838                 from_unknown_sta(drv, hdr, len);
2839                 break;
2840         }
2841 }
2842
2843
2844 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2845 {
2846         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2847         int len;
2848         unsigned char buf[3000];
2849         struct ieee80211_radiotap_iterator iter;
2850         int ret;
2851         struct hostapd_frame_info hfi;
2852         int injected = 0, failed = 0, rxflags = 0;
2853
2854         len = recv(sock, buf, sizeof(buf), 0);
2855         if (len < 0) {
2856                 perror("recv");
2857                 return;
2858         }
2859
2860         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2861                 printf("received invalid radiotap frame\n");
2862                 return;
2863         }
2864
2865         memset(&hfi, 0, sizeof(hfi));
2866
2867         while (1) {
2868                 ret = ieee80211_radiotap_iterator_next(&iter);
2869                 if (ret == -ENOENT)
2870                         break;
2871                 if (ret) {
2872                         printf("received invalid radiotap frame (%d)\n", ret);
2873                         return;
2874                 }
2875                 switch (iter.this_arg_index) {
2876                 case IEEE80211_RADIOTAP_FLAGS:
2877                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2878                                 len -= 4;
2879                         break;
2880                 case IEEE80211_RADIOTAP_RX_FLAGS:
2881                         rxflags = 1;
2882                         break;
2883                 case IEEE80211_RADIOTAP_TX_FLAGS:
2884                         injected = 1;
2885                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2886                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2887                         break;
2888                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2889                         break;
2890                 case IEEE80211_RADIOTAP_CHANNEL:
2891                         /* TODO convert from freq/flags to channel number
2892                         hfi.channel = XXX;
2893                         hfi.phytype = XXX;
2894                          */
2895                         break;
2896                 case IEEE80211_RADIOTAP_RATE:
2897                         hfi.datarate = *iter.this_arg * 5;
2898                         break;
2899                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2900                         hfi.ssi_signal = *iter.this_arg;
2901                         break;
2902                 }
2903         }
2904
2905         if (rxflags && injected)
2906                 return;
2907
2908         if (!injected)
2909                 handle_frame(drv, buf + iter.max_length,
2910                              len - iter.max_length, &hfi);
2911         else
2912                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2913                                    len - iter.max_length, !failed);
2914 }
2915
2916
2917 /*
2918  * we post-process the filter code later and rewrite
2919  * this to the offset to the last instruction
2920  */
2921 #define PASS    0xFF
2922 #define FAIL    0xFE
2923
2924 static struct sock_filter msock_filter_insns[] = {
2925         /*
2926          * do a little-endian load of the radiotap length field
2927          */
2928         /* load lower byte into A */
2929         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2930         /* put it into X (== index register) */
2931         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2932         /* load upper byte into A */
2933         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2934         /* left-shift it by 8 */
2935         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2936         /* or with X */
2937         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2938         /* put result into X */
2939         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2940
2941         /*
2942          * Allow management frames through, this also gives us those
2943          * management frames that we sent ourselves with status
2944          */
2945         /* load the lower byte of the IEEE 802.11 frame control field */
2946         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2947         /* mask off frame type and version */
2948         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2949         /* accept frame if it's both 0, fall through otherwise */
2950         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2951
2952         /*
2953          * TODO: add a bit to radiotap RX flags that indicates
2954          * that the sending station is not associated, then
2955          * add a filter here that filters on our DA and that flag
2956          * to allow us to deauth frames to that bad station.
2957          *
2958          * Not a regression -- we didn't do it before either.
2959          */
2960
2961 #if 0
2962         /*
2963          * drop non-data frames, WDS frames
2964          */
2965         /* load the lower byte of the frame control field */
2966         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2967         /* mask off QoS bit */
2968         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2969         /* drop non-data frames */
2970         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2971         /* load the upper byte of the frame control field */
2972         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2973         /* mask off toDS/fromDS */
2974         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2975         /* drop WDS frames */
2976         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2977 #endif
2978
2979         /*
2980          * add header length to index
2981          */
2982         /* load the lower byte of the frame control field */
2983         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2984         /* mask off QoS bit */
2985         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2986         /* right shift it by 6 to give 0 or 2 */
2987         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2988         /* add data frame header length */
2989         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2990         /* add index, was start of 802.11 header */
2991         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2992         /* move to index, now start of LL header */
2993         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2994
2995         /*
2996          * Accept empty data frames, we use those for
2997          * polling activity.
2998          */
2999         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3000         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3001
3002         /*
3003          * Accept EAPOL frames
3004          */
3005         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3006         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3007         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3008         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3009
3010         /* keep these last two statements or change the code below */
3011         /* return 0 == "DROP" */
3012         BPF_STMT(BPF_RET | BPF_K, 0),
3013         /* return ~0 == "keep all" */
3014         BPF_STMT(BPF_RET | BPF_K, ~0),
3015 };
3016
3017 static struct sock_fprog msock_filter = {
3018         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3019         .filter = msock_filter_insns,
3020 };
3021
3022
3023 static int add_monitor_filter(int s)
3024 {
3025         int idx;
3026
3027         /* rewrite all PASS/FAIL jump offsets */
3028         for (idx = 0; idx < msock_filter.len; idx++) {
3029                 struct sock_filter *insn = &msock_filter_insns[idx];
3030
3031                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3032                         if (insn->code == (BPF_JMP|BPF_JA)) {
3033                                 if (insn->k == PASS)
3034                                         insn->k = msock_filter.len - idx - 2;
3035                                 else if (insn->k == FAIL)
3036                                         insn->k = msock_filter.len - idx - 3;
3037                         }
3038
3039                         if (insn->jt == PASS)
3040                                 insn->jt = msock_filter.len - idx - 2;
3041                         else if (insn->jt == FAIL)
3042                                 insn->jt = msock_filter.len - idx - 3;
3043
3044                         if (insn->jf == PASS)
3045                                 insn->jf = msock_filter.len - idx - 2;
3046                         else if (insn->jf == FAIL)
3047                                 insn->jf = msock_filter.len - idx - 3;
3048                 }
3049         }
3050
3051         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3052                        &msock_filter, sizeof(msock_filter))) {
3053                 perror("SO_ATTACH_FILTER");
3054                 return -1;
3055         }
3056
3057         return 0;
3058 }
3059
3060
3061 static void nl80211_remove_monitor_interface(
3062         struct wpa_driver_nl80211_data *drv)
3063 {
3064         if (drv->monitor_ifidx >= 0) {
3065                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3066                 drv->monitor_ifidx = -1;
3067         }
3068 }
3069
3070
3071 static int
3072 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3073 {
3074         char buf[IFNAMSIZ];
3075         struct sockaddr_ll ll;
3076         int optval;
3077         socklen_t optlen;
3078
3079         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3080         buf[IFNAMSIZ - 1] = '\0';
3081
3082         drv->monitor_ifidx =
3083                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
3084
3085         if (drv->monitor_ifidx < 0)
3086                 return -1;
3087
3088         if (hostapd_set_iface_flags(drv, buf, 1))
3089                 goto error;
3090
3091         memset(&ll, 0, sizeof(ll));
3092         ll.sll_family = AF_PACKET;
3093         ll.sll_ifindex = drv->monitor_ifidx;
3094         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3095         if (drv->monitor_sock < 0) {
3096                 perror("socket[PF_PACKET,SOCK_RAW]");
3097                 goto error;
3098         }
3099
3100         if (add_monitor_filter(drv->monitor_sock)) {
3101                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3102                            "interface; do filtering in user space");
3103                 /* This works, but will cost in performance. */
3104         }
3105
3106         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3107                 perror("monitor socket bind");
3108                 goto error;
3109         }
3110
3111         optlen = sizeof(optval);
3112         optval = 20;
3113         if (setsockopt
3114             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3115                 perror("Failed to set socket priority");
3116                 goto error;
3117         }
3118
3119         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3120                                      drv, NULL)) {
3121                 printf("Could not register monitor read socket\n");
3122                 goto error;
3123         }
3124
3125         return 0;
3126  error:
3127         nl80211_remove_monitor_interface(drv);
3128         return -1;
3129 }
3130
3131
3132 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3133
3134 static int wpa_driver_nl80211_hapd_send_eapol(
3135         void *priv, const u8 *addr, const u8 *data,
3136         size_t data_len, int encrypt, const u8 *own_addr)
3137 {
3138         struct wpa_driver_nl80211_data *drv = priv;
3139         struct ieee80211_hdr *hdr;
3140         size_t len;
3141         u8 *pos;
3142         int res;
3143 #if 0 /* FIX */
3144         int qos = sta->flags & WLAN_STA_WME;
3145 #else
3146         int qos = 0;
3147 #endif
3148
3149         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3150                 data_len;
3151         hdr = os_zalloc(len);
3152         if (hdr == NULL) {
3153                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3154                        (unsigned long) len);
3155                 return -1;
3156         }
3157
3158         hdr->frame_control =
3159                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3160         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3161         if (encrypt)
3162                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3163 #if 0 /* To be enabled if qos determination is added above */
3164         if (qos) {
3165                 hdr->frame_control |=
3166                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3167         }
3168 #endif
3169
3170         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3171         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3172         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3173         pos = (u8 *) (hdr + 1);
3174
3175 #if 0 /* To be enabled if qos determination is added above */
3176         if (qos) {
3177                 /* add an empty QoS header if needed */
3178                 pos[0] = 0;
3179                 pos[1] = 0;
3180                 pos += 2;
3181         }
3182 #endif
3183
3184         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3185         pos += sizeof(rfc1042_header);
3186         WPA_PUT_BE16(pos, ETH_P_PAE);
3187         pos += 2;
3188         memcpy(pos, data, data_len);
3189
3190         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3191         if (res < 0) {
3192                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3193                            "failed: %d (%s)",
3194                            (unsigned long) len, errno, strerror(errno));
3195         }
3196         free(hdr);
3197
3198         return res;
3199 }
3200
3201
3202 static u32 sta_flags_nl80211(int flags)
3203 {
3204         u32 f = 0;
3205
3206         if (flags & WLAN_STA_AUTHORIZED)
3207                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3208         if (flags & WLAN_STA_WMM)
3209                 f |= BIT(NL80211_STA_FLAG_WME);
3210         if (flags & WLAN_STA_SHORT_PREAMBLE)
3211                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3212         if (flags & WLAN_STA_MFP)
3213                 f |= BIT(NL80211_STA_FLAG_MFP);
3214
3215         return f;
3216 }
3217
3218
3219 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3220                                             int total_flags, int flags_or,
3221                                             int flags_and)
3222 {
3223         struct wpa_driver_nl80211_data *drv = priv;
3224         struct nl_msg *msg, *flags = NULL;
3225         struct nl80211_sta_flag_update upd;
3226
3227         msg = nlmsg_alloc();
3228         if (!msg)
3229                 return -ENOMEM;
3230
3231         flags = nlmsg_alloc();
3232         if (!flags) {
3233                 nlmsg_free(msg);
3234                 return -ENOMEM;
3235         }
3236
3237         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3238                     0, NL80211_CMD_SET_STATION, 0);
3239
3240         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3241                     if_nametoindex(drv->ifname));
3242         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3243
3244         /*
3245          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3246          * can be removed eventually.
3247          */
3248         if (total_flags & WLAN_STA_AUTHORIZED)
3249                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3250
3251         if (total_flags & WLAN_STA_WMM)
3252                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3253
3254         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3255                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3256
3257         if (total_flags & WLAN_STA_MFP)
3258                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3259
3260         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3261                 goto nla_put_failure;
3262
3263         os_memset(&upd, 0, sizeof(upd));
3264         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3265         upd.set = sta_flags_nl80211(flags_or);
3266         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3267
3268         nlmsg_free(flags);
3269
3270         return send_and_recv_msgs(drv, msg, NULL, NULL);
3271  nla_put_failure:
3272         nlmsg_free(flags);
3273         return -ENOBUFS;
3274 }
3275
3276 #endif /* CONFIG_AP || HOSTAPD */
3277
3278 #ifdef CONFIG_AP
3279
3280 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3281                                  struct wpa_driver_associate_params *params)
3282 {
3283         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3284             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3285                 nl80211_remove_monitor_interface(drv);
3286                 return -1;
3287         }
3288
3289         /* TODO: setup monitor interface (and add code somewhere to remove this
3290          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3291
3292         return 0;
3293 }
3294 #endif /* CONFIG_AP */
3295
3296
3297 static int wpa_driver_nl80211_connect(
3298         struct wpa_driver_nl80211_data *drv,
3299         struct wpa_driver_associate_params *params)
3300 {
3301         struct nl_msg *msg;
3302         enum nl80211_auth_type type;
3303         int ret = 0;
3304
3305         msg = nlmsg_alloc();
3306         if (!msg)
3307                 return -1;
3308
3309         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3310         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3311                     NL80211_CMD_CONNECT, 0);
3312
3313         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3314         if (params->bssid) {
3315                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3316                            MAC2STR(params->bssid));
3317                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3318         }
3319         if (params->freq) {
3320                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3321                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3322         }
3323         if (params->ssid) {
3324                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3325                                   params->ssid, params->ssid_len);
3326                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3327                         params->ssid);
3328                 if (params->ssid_len > sizeof(drv->ssid))
3329                         goto nla_put_failure;
3330                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3331                 drv->ssid_len = params->ssid_len;
3332         }
3333         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3334         if (params->wpa_ie)
3335                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3336                         params->wpa_ie);
3337
3338         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3339                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3340         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3341                 type = NL80211_AUTHTYPE_SHARED_KEY;
3342         else if (params->auth_alg & AUTH_ALG_LEAP)
3343                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3344         else if (params->auth_alg & AUTH_ALG_FT)
3345                 type = NL80211_AUTHTYPE_FT;
3346         else
3347                 goto nla_put_failure;
3348
3349         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3350         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3351
3352         if (params->wpa_ie && params->wpa_ie_len) {
3353                 enum nl80211_wpa_versions ver;
3354
3355                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3356                         ver = NL80211_WPA_VERSION_2;
3357                 else
3358                         ver = NL80211_WPA_VERSION_1;
3359
3360                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3361                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3362         }
3363
3364         if (params->pairwise_suite != CIPHER_NONE) {
3365                 int cipher;
3366
3367                 switch (params->pairwise_suite) {
3368                 case CIPHER_WEP40:
3369                         cipher = WLAN_CIPHER_SUITE_WEP40;
3370                         break;
3371                 case CIPHER_WEP104:
3372                         cipher = WLAN_CIPHER_SUITE_WEP104;
3373                         break;
3374                 case CIPHER_CCMP:
3375                         cipher = WLAN_CIPHER_SUITE_CCMP;
3376                         break;
3377                 case CIPHER_TKIP:
3378                 default:
3379                         cipher = WLAN_CIPHER_SUITE_TKIP;
3380                         break;
3381                 }
3382                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3383         }
3384
3385         if (params->group_suite != CIPHER_NONE) {
3386                 int cipher;
3387
3388                 switch (params->group_suite) {
3389                 case CIPHER_WEP40:
3390                         cipher = WLAN_CIPHER_SUITE_WEP40;
3391                         break;
3392                 case CIPHER_WEP104:
3393                         cipher = WLAN_CIPHER_SUITE_WEP104;
3394                         break;
3395                 case CIPHER_CCMP:
3396                         cipher = WLAN_CIPHER_SUITE_CCMP;
3397                         break;
3398                 case CIPHER_TKIP:
3399                 default:
3400                         cipher = WLAN_CIPHER_SUITE_TKIP;
3401                         break;
3402                 }
3403                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3404         }
3405
3406         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3407             params->key_mgmt_suite == KEY_MGMT_PSK) {
3408                 int mgmt = WLAN_AKM_SUITE_PSK;
3409
3410                 switch (params->key_mgmt_suite) {
3411                 case KEY_MGMT_802_1X:
3412                         mgmt = WLAN_AKM_SUITE_8021X;
3413                         break;
3414                 case KEY_MGMT_PSK:
3415                 default:
3416                         mgmt = WLAN_AKM_SUITE_PSK;
3417                         break;
3418                 }
3419                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3420         }
3421
3422         ret = nl80211_set_conn_keys(params, msg);
3423         if (ret)
3424                 goto nla_put_failure;
3425
3426         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3427         msg = NULL;
3428         if (ret) {
3429                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3430                            "(%s)", ret, strerror(-ret));
3431                 goto nla_put_failure;
3432         }
3433         ret = 0;
3434         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3435
3436 nla_put_failure:
3437         nlmsg_free(msg);
3438         return ret;
3439
3440 }
3441
3442
3443 static int wpa_driver_nl80211_associate(
3444         void *priv, struct wpa_driver_associate_params *params)
3445 {
3446         struct wpa_driver_nl80211_data *drv = priv;
3447         int ret = -1;
3448         struct nl_msg *msg;
3449
3450 #ifdef CONFIG_AP
3451         if (params->mode == 2)
3452                 return wpa_driver_nl80211_ap(drv, params);
3453 #endif /* CONFIG_AP */
3454
3455         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
3456                 return wpa_driver_nl80211_connect(drv, params);
3457
3458         drv->associated = 0;
3459
3460         msg = nlmsg_alloc();
3461         if (!msg)
3462                 return -1;
3463
3464         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3465                    drv->ifindex);
3466         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3467                     NL80211_CMD_ASSOCIATE, 0);
3468
3469         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3470         if (params->bssid) {
3471                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3472                            MAC2STR(params->bssid));
3473                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3474         }
3475         if (params->freq) {
3476                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3477                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3478         }
3479         if (params->ssid) {
3480                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3481                                   params->ssid, params->ssid_len);
3482                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3483                         params->ssid);
3484                 if (params->ssid_len > sizeof(drv->ssid))
3485                         goto nla_put_failure;
3486                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3487                 drv->ssid_len = params->ssid_len;
3488         }
3489         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3490         if (params->wpa_ie)
3491                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3492                         params->wpa_ie);
3493
3494 #ifdef CONFIG_IEEE80211W
3495         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3496                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3497 #endif /* CONFIG_IEEE80211W */
3498
3499         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3500
3501         if (params->prev_bssid) {
3502                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3503                            MAC2STR(params->prev_bssid));
3504                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3505                         params->prev_bssid);
3506         }
3507
3508         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3509         msg = NULL;
3510         if (ret) {
3511                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3512                            "(%s)", ret, strerror(-ret));
3513                 goto nla_put_failure;
3514         }
3515         ret = 0;
3516         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3517                    "successfully");
3518
3519 nla_put_failure:
3520         nlmsg_free(msg);
3521         return ret;
3522 }
3523
3524
3525 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3526                             int ifindex, int mode)
3527 {
3528         struct nl_msg *msg;
3529         int ret = -ENOBUFS;
3530
3531         msg = nlmsg_alloc();
3532         if (!msg)
3533                 return -ENOMEM;
3534
3535         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3536                     0, NL80211_CMD_SET_INTERFACE, 0);
3537         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3538         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3539
3540         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3541         if (!ret)
3542                 return 0;
3543 nla_put_failure:
3544         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3545                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3546         return ret;
3547 }
3548
3549
3550 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3551 {
3552         struct wpa_driver_nl80211_data *drv = priv;
3553         int ret = -1;
3554         int nlmode;
3555
3556         switch (mode) {
3557         case 0:
3558                 nlmode = NL80211_IFTYPE_STATION;
3559                 break;
3560         case 1:
3561                 nlmode = NL80211_IFTYPE_ADHOC;
3562                 break;
3563         case 2:
3564                 nlmode = NL80211_IFTYPE_AP;
3565                 break;
3566         default:
3567                 return -1;
3568         }
3569
3570         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3571                 drv->nlmode = nlmode;
3572                 ret = 0;
3573                 goto done;
3574         }
3575
3576         if (nlmode == drv->nlmode) {
3577                 ret = 0;
3578                 goto done; /* Already in the requested mode */
3579         }
3580
3581         /* mac80211 doesn't allow mode changes while the device is up, so
3582          * take the device down, try to set the mode again, and bring the
3583          * device back up.
3584          */
3585         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3586                 /* Try to set the mode again while the interface is down */
3587                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3588                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3589                         ret = -1;
3590         }
3591
3592         if (!ret)
3593                 drv->nlmode = nlmode;
3594
3595 done:
3596 #if defined(CONFIG_AP) || defined(HOSTAPD)
3597         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3598                 /* Setup additional AP mode functionality if needed */
3599                 if (drv->monitor_ifidx < 0 &&
3600                     nl80211_create_monitor_interface(drv))
3601                         return -1;
3602         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3603                 /* Remove additional AP mode functionality */
3604                 nl80211_remove_monitor_interface(drv);
3605         }
3606 #endif /* CONFIG_AP || HOSTAPD */
3607
3608         return ret;
3609 }
3610
3611
3612 static int wpa_driver_nl80211_get_capa(void *priv,
3613                                        struct wpa_driver_capa *capa)
3614 {
3615         struct wpa_driver_nl80211_data *drv = priv;
3616         if (!drv->has_capability)
3617                 return -1;
3618         os_memcpy(capa, &drv->capa, sizeof(*capa));
3619         return 0;
3620 }
3621
3622
3623 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3624 {
3625         struct wpa_driver_nl80211_data *drv = priv;
3626
3627         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3628                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3629         drv->operstate = state;
3630         return wpa_driver_nl80211_send_oper_ifla(
3631                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3632 }
3633
3634
3635 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3636 {
3637         struct wpa_driver_nl80211_data *drv = priv;
3638         struct nl_msg *msg;
3639         struct nl80211_sta_flag_update upd;
3640
3641         msg = nlmsg_alloc();
3642         if (!msg)
3643                 return -ENOMEM;
3644
3645         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3646                     0, NL80211_CMD_SET_STATION, 0);
3647
3648         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3649                     if_nametoindex(drv->ifname));
3650         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3651
3652         os_memset(&upd, 0, sizeof(upd));
3653         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3654         if (authorized)
3655                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3656         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3657
3658         return send_and_recv_msgs(drv, msg, NULL, NULL);
3659  nla_put_failure:
3660         return -ENOBUFS;
3661 }
3662
3663
3664 #ifdef HOSTAPD
3665
3666 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3667                                  int ifindex)
3668 {
3669         struct i802_bss *bss = &drv->bss;
3670         while (bss) {
3671                 if (ifindex == bss->ifindex)
3672                         return bss;
3673                 bss = bss->next;
3674         }
3675         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3676         return NULL;
3677 }
3678
3679
3680 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3681 {
3682         int i;
3683         int *old;
3684
3685         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3686                    ifidx);
3687         for (i = 0; i < drv->num_if_indices; i++) {
3688                 if (drv->if_indices[i] == 0) {
3689                         drv->if_indices[i] = ifidx;
3690                         return;
3691                 }
3692         }
3693
3694         if (drv->if_indices != drv->default_if_indices)
3695                 old = drv->if_indices;
3696         else
3697                 old = NULL;
3698
3699         drv->if_indices = realloc(old,
3700                                   sizeof(int) * (drv->num_if_indices + 1));
3701         if (!drv->if_indices) {
3702                 if (!old)
3703                         drv->if_indices = drv->default_if_indices;
3704                 else
3705                         drv->if_indices = old;
3706                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3707                            "interfaces");
3708                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3709                 return;
3710         }
3711         drv->if_indices[drv->num_if_indices] = ifidx;
3712         drv->num_if_indices++;
3713 }
3714
3715
3716 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3717 {
3718         int i;
3719
3720         for (i = 0; i < drv->num_if_indices; i++) {
3721                 if (drv->if_indices[i] == ifidx) {
3722                         drv->if_indices[i] = 0;
3723                         break;
3724                 }
3725         }
3726 }
3727
3728
3729 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3730 {
3731         int i;
3732
3733         for (i = 0; i < drv->num_if_indices; i++)
3734                 if (drv->if_indices[i] == ifidx)
3735                         return 1;
3736
3737         return 0;
3738 }
3739
3740
3741 static inline int min_int(int a, int b)
3742 {
3743         if (a < b)
3744                 return a;
3745         return b;
3746 }
3747
3748
3749 static int get_key_handler(struct nl_msg *msg, void *arg)
3750 {
3751         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3752         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3753
3754         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3755                   genlmsg_attrlen(gnlh, 0), NULL);
3756
3757         /*
3758          * TODO: validate the key index and mac address!
3759          * Otherwise, there's a race condition as soon as
3760          * the kernel starts sending key notifications.
3761          */
3762
3763         if (tb[NL80211_ATTR_KEY_SEQ])
3764                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3765                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3766         return NL_SKIP;
3767 }
3768
3769
3770 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3771                            int idx, u8 *seq)
3772 {
3773         struct wpa_driver_nl80211_data *drv = priv;
3774         struct nl_msg *msg;
3775
3776         msg = nlmsg_alloc();
3777         if (!msg)
3778                 return -ENOMEM;
3779
3780         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3781                     0, NL80211_CMD_GET_KEY, 0);
3782
3783         if (addr)
3784                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3785         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3786         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3787
3788         memset(seq, 0, 6);
3789
3790         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3791  nla_put_failure:
3792         return -ENOBUFS;
3793 }
3794
3795
3796 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3797                               int mode)
3798 {
3799         struct wpa_driver_nl80211_data *drv = priv;
3800         struct nl_msg *msg;
3801         u8 rates[NL80211_MAX_SUPP_RATES];
3802         u8 rates_len = 0;
3803         int i;
3804
3805         msg = nlmsg_alloc();
3806         if (!msg)
3807                 return -ENOMEM;
3808
3809         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3810                     NL80211_CMD_SET_BSS, 0);
3811
3812         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3813                 rates[rates_len++] = basic_rates[i] / 5;
3814
3815         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3816
3817         /* TODO: multi-BSS support */
3818         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3819
3820         return send_and_recv_msgs(drv, msg, NULL, NULL);
3821  nla_put_failure:
3822         return -ENOBUFS;
3823 }
3824
3825
3826 /* Set kernel driver on given frequency (MHz) */
3827 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3828 {
3829         struct wpa_driver_nl80211_data *drv = priv;
3830         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3831                                            freq->sec_channel_offset);
3832 }
3833
3834
3835 static int i802_set_rts(void *priv, int rts)
3836 {
3837         struct wpa_driver_nl80211_data *drv = priv;
3838         struct nl_msg *msg;
3839         int ret = -ENOBUFS;
3840         u32 val;
3841
3842         msg = nlmsg_alloc();
3843         if (!msg)
3844                 return -ENOMEM;
3845
3846         if (rts >= 2347)
3847                 val = (u32) -1;
3848         else
3849                 val = rts;
3850
3851         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3852                     0, NL80211_CMD_SET_WIPHY, 0);
3853         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3854         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3855
3856         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3857         if (!ret)
3858                 return 0;
3859 nla_put_failure:
3860         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3861                    "%d (%s)", rts, ret, strerror(-ret));
3862         return ret;
3863 }
3864
3865
3866 static int i802_set_frag(void *priv, int frag)
3867 {
3868         struct wpa_driver_nl80211_data *drv = priv;
3869         struct nl_msg *msg;
3870         int ret = -ENOBUFS;
3871         u32 val;
3872
3873         msg = nlmsg_alloc();
3874         if (!msg)
3875                 return -ENOMEM;
3876
3877         if (frag >= 2346)
3878                 val = (u32) -1;
3879         else
3880                 val = frag;
3881
3882         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3883                     0, NL80211_CMD_SET_WIPHY, 0);
3884         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3885         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3886
3887         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3888         if (!ret)
3889                 return 0;
3890 nla_put_failure:
3891         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3892                    "%d: %d (%s)", frag, ret, strerror(-ret));
3893         return ret;
3894 }
3895
3896
3897 static int i802_flush(void *priv)
3898 {
3899         struct wpa_driver_nl80211_data *drv = priv;
3900         struct nl_msg *msg;
3901
3902         msg = nlmsg_alloc();
3903         if (!msg)
3904                 return -1;
3905
3906         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3907                     0, NL80211_CMD_DEL_STATION, 0);
3908
3909         /*
3910          * XXX: FIX! this needs to flush all VLANs too
3911          */
3912         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3913                     if_nametoindex(drv->ifname));
3914
3915         return send_and_recv_msgs(drv, msg, NULL, NULL);
3916  nla_put_failure:
3917         return -ENOBUFS;
3918 }
3919
3920
3921 static int get_sta_handler(struct nl_msg *msg, void *arg)
3922 {
3923         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3924         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3925         struct hostap_sta_driver_data *data = arg;
3926         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3927         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3928                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3929                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3930                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3931                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3932                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3933         };
3934
3935         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3936                   genlmsg_attrlen(gnlh, 0), NULL);
3937
3938         /*
3939          * TODO: validate the interface and mac address!
3940          * Otherwise, there's a race condition as soon as
3941          * the kernel starts sending station notifications.
3942          */
3943
3944         if (!tb[NL80211_ATTR_STA_INFO]) {
3945                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3946                 return NL_SKIP;
3947         }
3948         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3949                              tb[NL80211_ATTR_STA_INFO],
3950                              stats_policy)) {
3951                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3952                 return NL_SKIP;
3953         }
3954
3955         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3956                 data->inactive_msec =
3957                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3958         if (stats[NL80211_STA_INFO_RX_BYTES])
3959                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3960         if (stats[NL80211_STA_INFO_TX_BYTES])
3961                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3962         if (stats[NL80211_STA_INFO_RX_PACKETS])
3963                 data->rx_packets =
3964                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3965         if (stats[NL80211_STA_INFO_TX_PACKETS])
3966                 data->tx_packets =
3967                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3968
3969         return NL_SKIP;
3970 }
3971
3972 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3973                               const u8 *addr)
3974 {
3975         struct wpa_driver_nl80211_data *drv = priv;
3976         struct nl_msg *msg;
3977
3978         os_memset(data, 0, sizeof(*data));
3979         msg = nlmsg_alloc();
3980         if (!msg)
3981                 return -ENOMEM;
3982
3983         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3984                     0, NL80211_CMD_GET_STATION, 0);
3985
3986         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3987         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3988
3989         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3990  nla_put_failure:
3991         return -ENOBUFS;
3992 }
3993
3994
3995 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3996                                     int cw_min, int cw_max, int burst_time)
3997 {
3998         struct wpa_driver_nl80211_data *drv = priv;
3999         struct nl_msg *msg;
4000         struct nlattr *txq, *params;
4001
4002         msg = nlmsg_alloc();
4003         if (!msg)
4004                 return -1;
4005
4006         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4007                     0, NL80211_CMD_SET_WIPHY, 0);
4008
4009         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4010
4011         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4012         if (!txq)
4013                 goto nla_put_failure;
4014
4015         /* We are only sending parameters for a single TXQ at a time */
4016         params = nla_nest_start(msg, 1);
4017         if (!params)
4018                 goto nla_put_failure;
4019
4020         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4021         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4022          * 32 usec, so need to convert the value here. */
4023         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4024         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4025         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4026         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4027
4028         nla_nest_end(msg, params);
4029
4030         nla_nest_end(msg, txq);
4031
4032         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4033                 return 0;
4034  nla_put_failure:
4035         return -1;
4036 }
4037
4038
4039 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
4040 {
4041         struct wpa_driver_nl80211_data *drv = priv;
4042         int ifidx;
4043         struct i802_bss *bss;
4044
4045         bss = os_zalloc(sizeof(*bss));
4046         if (bss == NULL)
4047                 return -1;
4048
4049         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
4050         if (ifidx < 0) {
4051                 os_free(bss);
4052                 return -1;
4053         }
4054         bss->ifindex = ifidx;
4055         if (hostapd_set_iface_flags(priv, ifname, 1)) {
4056                 nl80211_remove_iface(priv, ifidx);
4057                 os_free(bss);
4058                 return -1;
4059         }
4060         bss->next = drv->bss.next;
4061         drv->bss.next = bss;
4062         return 0;
4063 }
4064
4065
4066 static int i802_bss_remove(void *priv, const char *ifname)
4067 {
4068         struct wpa_driver_nl80211_data *drv = priv;
4069         struct i802_bss *bss, *prev;
4070         int ifindex = if_nametoindex(ifname);
4071         nl80211_remove_iface(priv, ifindex);
4072         prev = &drv->bss;
4073         bss = drv->bss.next;
4074         while (bss) {
4075                 if (ifindex == bss->ifindex) {
4076                         prev->next = bss->next;
4077                         os_free(bss);
4078                         break;
4079                 }
4080                 prev = bss;
4081                 bss = bss->next;
4082         }
4083         return 0;
4084 }
4085
4086
4087 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4088 {
4089         struct wpa_driver_nl80211_data *drv = priv;
4090         struct nl_msg *msg;
4091
4092         msg = nlmsg_alloc();
4093         if (!msg)
4094                 return -ENOMEM;
4095
4096         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4097                     NL80211_CMD_SET_BSS, 0);
4098
4099         if (cts >= 0)
4100                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4101         if (preamble >= 0)
4102                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4103         if (slot >= 0)
4104                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4105
4106         /* TODO: multi-BSS support */
4107         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4108
4109         return send_and_recv_msgs(drv, msg, NULL, NULL);
4110  nla_put_failure:
4111         return -ENOBUFS;
4112 }
4113
4114
4115 static int i802_set_cts_protect(void *priv, int value)
4116 {
4117         return i802_set_bss(priv, value, -1, -1);
4118 }
4119
4120
4121 static int i802_set_preamble(void *priv, int value)
4122 {
4123         return i802_set_bss(priv, -1, value, -1);
4124 }
4125
4126
4127 static int i802_set_short_slot_time(void *priv, int value)
4128 {
4129         return i802_set_bss(priv, -1, -1, value);
4130 }
4131
4132
4133 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
4134 {
4135         switch (type) {
4136         case HOSTAPD_IF_VLAN:
4137                 return NL80211_IFTYPE_AP_VLAN;
4138         }
4139         return -1;
4140 }
4141
4142
4143 static int i802_if_add(const char *iface, void *priv,
4144                        enum hostapd_driver_if_type type, char *ifname,
4145                        const u8 *addr)
4146 {
4147         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
4148                 return -1;
4149         return 0;
4150 }
4151
4152
4153 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
4154                           char *ifname, const u8 *addr)
4155 {
4156         /* unused at the moment */
4157         return -1;
4158 }
4159
4160
4161 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
4162                           const char *ifname, const u8 *addr)
4163 {
4164         nl80211_remove_iface(priv, if_nametoindex(ifname));
4165         return 0;
4166 }
4167
4168
4169 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4170                              const char *ifname, int vlan_id)
4171 {
4172         struct wpa_driver_nl80211_data *drv = priv;
4173         struct nl_msg *msg;
4174
4175         msg = nlmsg_alloc();
4176         if (!msg)
4177                 return -ENOMEM;
4178
4179         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4180                     0, NL80211_CMD_SET_STATION, 0);
4181
4182         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4183                     if_nametoindex(drv->ifname));
4184         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4185         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4186                     if_nametoindex(ifname));
4187
4188         return send_and_recv_msgs(drv, msg, NULL, NULL);
4189  nla_put_failure:
4190         return -ENOBUFS;
4191 }
4192
4193
4194 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4195 {
4196         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4197         struct sockaddr_ll lladdr;
4198         unsigned char buf[3000];
4199         int len;
4200         socklen_t fromlen = sizeof(lladdr);
4201
4202         len = recvfrom(sock, buf, sizeof(buf), 0,
4203                        (struct sockaddr *)&lladdr, &fromlen);
4204         if (len < 0) {
4205                 perror("recv");
4206                 return;
4207         }
4208
4209         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4210                 void *ctx;
4211                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4212                 if (!ctx)
4213                         return;
4214                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4215         }
4216 }
4217
4218
4219 static int i802_get_inact_sec(void *priv, const u8 *addr)
4220 {
4221         struct hostap_sta_driver_data data;
4222         int ret;
4223
4224         data.inactive_msec = (unsigned long) -1;
4225         ret = i802_read_sta_data(priv, &data, addr);
4226         if (ret || data.inactive_msec == (unsigned long) -1)
4227                 return -1;
4228         return data.inactive_msec / 1000;
4229 }
4230
4231
4232 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4233 {
4234 #if 0
4235         /* TODO */
4236 #endif
4237         return 0;
4238 }
4239
4240
4241 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4242                            int reason)
4243 {
4244         struct wpa_driver_nl80211_data *drv = priv;
4245         struct ieee80211_mgmt mgmt;
4246
4247         memset(&mgmt, 0, sizeof(mgmt));
4248         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4249                                           WLAN_FC_STYPE_DEAUTH);
4250         memcpy(mgmt.da, addr, ETH_ALEN);
4251         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4252         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4253         mgmt.u.deauth.reason_code = host_to_le16(reason);
4254         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4255                                             IEEE80211_HDRLEN +
4256                                             sizeof(mgmt.u.deauth));
4257 }
4258
4259
4260 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4261                              int reason)
4262 {
4263         struct wpa_driver_nl80211_data *drv = priv;
4264         struct ieee80211_mgmt mgmt;
4265
4266         memset(&mgmt, 0, sizeof(mgmt));
4267         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4268                                           WLAN_FC_STYPE_DISASSOC);
4269         memcpy(mgmt.da, addr, ETH_ALEN);
4270         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4271         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4272         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4273         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4274                                             IEEE80211_HDRLEN +
4275                                             sizeof(mgmt.u.disassoc));
4276 }
4277
4278
4279 static void *i802_init(struct hostapd_data *hapd,
4280                        struct wpa_init_params *params)
4281 {
4282         struct wpa_driver_nl80211_data *drv;
4283         size_t i;
4284
4285         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4286         if (drv == NULL)
4287                 return NULL;
4288
4289         drv->bss.ifindex = drv->ifindex;
4290
4291         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4292         drv->if_indices = drv->default_if_indices;
4293         for (i = 0; i < params->num_bridge; i++) {
4294                 if (params->bridge[i])
4295                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4296         }
4297
4298         /* start listening for EAPOL on the default AP interface */
4299         add_ifidx(drv, drv->ifindex);
4300
4301         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4302                 goto failed;
4303
4304         if (params->bssid) {
4305                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4306                         goto failed;
4307         }
4308
4309         if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
4310                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4311                            "into AP mode", drv->ifname);
4312                 goto failed;
4313         }
4314
4315         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4316                 goto failed;
4317
4318         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4319         if (drv->eapol_sock < 0) {
4320                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4321                 goto failed;
4322         }
4323
4324         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4325         {
4326                 printf("Could not register read socket for eapol\n");
4327                 goto failed;
4328         }
4329
4330         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4331                 goto failed;
4332
4333         return drv;
4334
4335 failed:
4336         nl80211_remove_monitor_interface(drv);
4337         if (drv->ioctl_sock >= 0)
4338                 close(drv->ioctl_sock);
4339
4340         genl_family_put(drv->nl80211);
4341         nl_cache_free(drv->nl_cache);
4342         nl_handle_destroy(drv->nl_handle);
4343         nl_cb_put(drv->nl_cb);
4344
4345         os_free(drv);
4346         return NULL;
4347 }
4348
4349
4350 static void i802_deinit(void *priv)
4351 {
4352         wpa_driver_nl80211_deinit(priv);
4353 }
4354
4355 #endif /* HOSTAPD */
4356
4357
4358 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4359         .name = "nl80211",
4360         .desc = "Linux nl80211/cfg80211",
4361         .get_bssid = wpa_driver_nl80211_get_bssid,
4362         .get_ssid = wpa_driver_nl80211_get_ssid,
4363         .set_key = wpa_driver_nl80211_set_key,
4364         .scan2 = wpa_driver_nl80211_scan,
4365         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4366         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4367         .disassociate = wpa_driver_nl80211_disassociate,
4368         .authenticate = wpa_driver_nl80211_authenticate,
4369         .associate = wpa_driver_nl80211_associate,
4370         .init = wpa_driver_nl80211_init,
4371         .deinit = wpa_driver_nl80211_deinit,
4372         .get_capa = wpa_driver_nl80211_get_capa,
4373         .set_operstate = wpa_driver_nl80211_set_operstate,
4374         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4375         .set_country = wpa_driver_nl80211_set_country,
4376         .set_mode = wpa_driver_nl80211_set_mode,
4377         .set_beacon = wpa_driver_nl80211_set_beacon,
4378 #if defined(CONFIG_AP) || defined(HOSTAPD)
4379         .send_mlme = wpa_driver_nl80211_send_mlme,
4380         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4381         .sta_add = wpa_driver_nl80211_sta_add,
4382         .sta_remove = wpa_driver_nl80211_sta_remove,
4383         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4384         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4385 #endif /* CONFIG_AP || HOSTAPD */
4386 #ifdef HOSTAPD
4387         .hapd_init = i802_init,
4388         .hapd_deinit = i802_deinit,
4389         .get_seqnum = i802_get_seqnum,
4390         .flush = i802_flush,
4391         .read_sta_data = i802_read_sta_data,
4392         .sta_deauth = i802_sta_deauth,
4393         .sta_disassoc = i802_sta_disassoc,
4394         .get_inact_sec = i802_get_inact_sec,
4395         .sta_clear_stats = i802_sta_clear_stats,
4396         .set_freq = i802_set_freq,
4397         .set_rts = i802_set_rts,
4398         .set_frag = i802_set_frag,
4399         .set_rate_sets = i802_set_rate_sets,
4400         .set_cts_protect = i802_set_cts_protect,
4401         .set_preamble = i802_set_preamble,
4402         .set_short_slot_time = i802_set_short_slot_time,
4403         .set_tx_queue_params = i802_set_tx_queue_params,
4404         .bss_add = i802_bss_add,
4405         .bss_remove = i802_bss_remove,
4406         .if_add = i802_if_add,
4407         .if_update = i802_if_update,
4408         .if_remove = i802_if_remove,
4409         .set_sta_vlan = i802_set_sta_vlan,
4410 #endif /* HOSTAPD */
4411 };