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 <netpacket/packet.h>
  27 #include <linux/filter.h>
  28 #include "nl80211_copy.h"
  29
  30 #include "common.h"
  31 #include "eloop.h"
  32 #include "common/ieee802_11_defs.h"
  33 #include "netlink.h"
  34 #include "radiotap.h"
  35 #include "radiotap_iter.h"
  36 #include "driver.h"
  37
  38 #ifdef CONFIG_LIBNL20
  39 /* libnl 2.0 compatibility code */
  40 #define nl_handle nl_sock
  41 #define nl_handle_alloc_cb nl_socket_alloc_cb
  42 #define nl_handle_destroy nl_socket_free
  43 #endif /* CONFIG_LIBNL20 */
  44
  45
  46 #ifndef IFF_LOWER_UP
  47 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  48 #endif
  49 #ifndef IFF_DORMANT
  50 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  51 #endif
  52
  53 #ifndef IF_OPER_DORMANT
  54 #define IF_OPER_DORMANT 5
  55 #endif
  56 #ifndef IF_OPER_UP
  57 #define IF_OPER_UP 6
  58 #endif
  59
  60 struct i802_bss {
  61         struct i802_bss *next;
  62         int ifindex;
  63         unsigned int beacon_set:1;
  64 };
  65
  66 struct wpa_driver_nl80211_data {
  67         void *ctx;
  68         int link_event_sock;
  69         int ioctl_sock; /* socket for ioctl() use */
  70         char ifname[IFNAMSIZ + 1];
  71         int ifindex;
  72         int if_removed;
  73         struct wpa_driver_capa capa;
  74         int has_capability;
  75
  76         int operstate;
  77
  78         int scan_complete_events;
  79
  80         struct nl_handle *nl_handle;
  81         struct nl_handle *nl_handle_event;
  82         struct nl_cache *nl_cache;
  83         struct nl_cache *nl_cache_event;
  84         struct nl_cb *nl_cb;
  85         struct genl_family *nl80211;
  86
  87         u8 auth_bssid[ETH_ALEN];
  88         u8 bssid[ETH_ALEN];
  89         int associated;
  90         u8 ssid[32];
  91         size_t ssid_len;
  92         int nlmode;
  93         int ap_scan_as_station;
  94
  95         int monitor_sock;
  96         int monitor_ifidx;
  97
  98         unsigned int beacon_set:1;
  99
 100 #ifdef HOSTAPD
 101         int eapol_sock; /* socket for EAPOL frames */
 102
 103         int default_if_indices[16];
 104         int *if_indices;
 105         int num_if_indices;
 106
 107         struct i802_bss bss;
 108
 109         int last_freq;
 110         int last_freq_ht;
 111 #endif /* HOSTAPD */
 112 };
 113
 114
 115 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 116                                             void *timeout_ctx);
 117 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 118 static int
 119 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 120 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 121                                    const u8 *addr, int cmd, u16 reason_code);
 122 static void nl80211_remove_monitor_interface(
 123         struct wpa_driver_nl80211_data *drv);
 124
 125 #ifdef HOSTAPD
 126 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 127 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 128 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 129                                  int ifindex);
 130 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 131 #endif /* HOSTAPD */
 132
 133
 134 /* nl80211 code */
 135 static int ack_handler(struct nl_msg *msg, void *arg)
 136 {
 137         int *err = arg;
 138         *err = 0;
 139         return NL_STOP;
 140 }
 141
 142 static int finish_handler(struct nl_msg *msg, void *arg)
 143 {
 144         int *ret = arg;
 145         *ret = 0;
 146         return NL_SKIP;
 147 }
 148
 149 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 150                          void *arg)
 151 {
 152         int *ret = arg;
 153         *ret = err->error;
 154         return NL_SKIP;
 155 }
 156
 157
 158 static int no_seq_check(struct nl_msg *msg, void *arg)
 159 {
 160         return NL_OK;
 161 }
 162
 163
 164 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 165                               struct nl_msg *msg,
 166                               int (*valid_handler)(struct nl_msg *, void *),
 167                               void *valid_data)
 168 {
 169         struct nl_cb *cb;
 170         int err = -ENOMEM;
 171
 172         cb = nl_cb_clone(drv->nl_cb);
 173         if (!cb)
 174                 goto out;
 175
 176         err = nl_send_auto_complete(drv->nl_handle, msg);
 177         if (err < 0)
 178                 goto out;
 179
 180         err = 1;
 181
 182         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 183         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 184         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 185
 186         if (valid_handler)
 187                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 188                           valid_handler, valid_data);
 189
 190         while (err > 0)
 191                 nl_recvmsgs(drv->nl_handle, cb);
 192  out:
 193         nl_cb_put(cb);
 194         nlmsg_free(msg);
 195         return err;
 196 }
 197
 198
 199 struct family_data {
 200         const char *group;
 201         int id;
 202 };
 203
 204
 205 static int family_handler(struct nl_msg *msg, void *arg)
 206 {
 207         struct family_data *res = arg;
 208         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 209         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 210         struct nlattr *mcgrp;
 211         int i;
 212
 213         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 214                   genlmsg_attrlen(gnlh, 0), NULL);
 215         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 216                 return NL_SKIP;
 217
 218         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 219                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 220                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 221                           nla_len(mcgrp), NULL);
 222                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 223                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 224                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 225                                res->group,
 226                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 227                         continue;
 228                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 229                 break;
 230         };
 231
 232         return NL_SKIP;
 233 }
 234
 235
 236 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 237                                const char *family, const char *group)
 238 {
 239         struct nl_msg *msg;
 240         int ret = -1;
 241         struct family_data res = { group, -ENOENT };
 242
 243         msg = nlmsg_alloc();
 244         if (!msg)
 245                 return -ENOMEM;
 246         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 247                     0, 0, CTRL_CMD_GETFAMILY, 0);
 248         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 249
 250         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 251         msg = NULL;
 252         if (ret == 0)
 253                 ret = res.id;
 254
 255 nla_put_failure:
 256         nlmsg_free(msg);
 257         return ret;
 258 }
 259
 260
 261 #ifdef HOSTAPD
 262 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 263                         const char *ifname, u8 *addr)
 264 {
 265         struct ifreq ifr;
 266
 267         os_memset(&ifr, 0, sizeof(ifr));
 268         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 269         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 270                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 271                            ifname, errno, strerror(errno));
 272                 return -1;
 273         }
 274
 275         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 276                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 277                            ifname, ifr.ifr_hwaddr.sa_family);
 278                 return -1;
 279         }
 280         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 281
 282         return 0;
 283 }
 284
 285
 286 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 287                         const char *ifname, const u8 *addr)
 288 {
 289         struct ifreq ifr;
 290
 291         os_memset(&ifr, 0, sizeof(ifr));
 292         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 293         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 294         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 295
 296         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 297                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 298                            ifname, errno, strerror(errno));
 299                 return -1;
 300         }
 301
 302         return 0;
 303 }
 304 #endif /* HOSTAPD */
 305
 306
 307 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 308 {
 309         struct wpa_driver_nl80211_data *drv = priv;
 310         if (!drv->associated)
 311                 return -1;
 312         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 313         return 0;
 314 }
 315
 316
 317 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 318 {
 319         struct wpa_driver_nl80211_data *drv = priv;
 320         if (!drv->associated)
 321                 return -1;
 322         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 323         return drv->ssid_len;
 324 }
 325
 326
 327 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 328                                           void *ctx, char *buf, size_t len,
 329                                           int del)
 330 {
 331         union wpa_event_data event;
 332
 333         os_memset(&event, 0, sizeof(event));
 334         if (len > sizeof(event.interface_status.ifname))
 335                 len = sizeof(event.interface_status.ifname) - 1;
 336         os_memcpy(event.interface_status.ifname, buf, len);
 337         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 338                 EVENT_INTERFACE_ADDED;
 339
 340         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 341                    del ? "DEL" : "NEW",
 342                    event.interface_status.ifname,
 343                    del ? "removed" : "added");
 344
 345         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 346                 if (del)
 347                         drv->if_removed = 1;
 348                 else
 349                         drv->if_removed = 0;
 350         }
 351
 352         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 353 }
 354
 355
 356 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 357                                          struct nlmsghdr *h)
 358 {
 359         struct ifinfomsg *ifi;
 360         int attrlen, _nlmsg_len, rta_len;
 361         struct rtattr *attr;
 362
 363         ifi = NLMSG_DATA(h);
 364
 365         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 366
 367         attrlen = NLMSG_PAYLOAD(h, sizeof(struct ifinfomsg));
 368         if (attrlen < 0)
 369                 return 0;
 370
 371         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 372
 373         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 374         while (RTA_OK(attr, attrlen)) {
 375                 if (attr->rta_type == IFLA_IFNAME) {
 376                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 377                             == 0)
 378                                 return 1;
 379                         else
 380                                 break;
 381                 }
 382                 attr = RTA_NEXT(attr, attrlen);
 383         }
 384
 385         return 0;
 386 }
 387
 388
 389 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 390                                           int ifindex, struct nlmsghdr *h)
 391 {
 392         if (drv->ifindex == ifindex)
 393                 return 1;
 394
 395         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 396                 drv->ifindex = if_nametoindex(drv->ifname);
 397                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 398                            "interface");
 399                 wpa_driver_nl80211_finish_drv_init(drv);
 400                 return 1;
 401         }
 402
 403         return 0;
 404 }
 405
 406
 407 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 408                                               void *ctx, struct nlmsghdr *h,
 409                                               size_t len)
 410 {
 411         struct ifinfomsg *ifi;
 412         int attrlen, _nlmsg_len, rta_len;
 413         struct rtattr * attr;
 414
 415         if (len < sizeof(*ifi))
 416                 return;
 417
 418         ifi = NLMSG_DATA(h);
 419
 420         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 421                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 422                            ifi->ifi_index);
 423                 return;
 424         }
 425
 426         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 427                    "(%s%s%s%s)",
 428                    drv->operstate, ifi->ifi_flags,
 429                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 430                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 431                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 432                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 433         /*
 434          * Some drivers send the association event before the operup event--in
 435          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 436          * fails. This will hit us when wpa_supplicant does not need to do
 437          * IEEE 802.1X authentication
 438          */
 439         if (drv->operstate == 1 &&
 440             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 441             !(ifi->ifi_flags & IFF_RUNNING))
 442                 netlink_send_oper_ifla(drv->link_event_sock, drv->ifindex,
 443                                        -1, IF_OPER_UP);
 444
 445         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 446
 447         attrlen = NLMSG_PAYLOAD(h, sizeof(struct ifinfomsg));
 448         if (attrlen < 0)
 449                 return;
 450
 451         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 452
 453         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 454         while (RTA_OK(attr, attrlen)) {
 455                 if (attr->rta_type == IFLA_IFNAME) {
 456                         wpa_driver_nl80211_event_link(
 457                                 drv, ctx,
 458                                 ((char *) attr) + rta_len,
 459                                 attr->rta_len - rta_len, 0);
 460                 }
 461                 attr = RTA_NEXT(attr, attrlen);
 462         }
 463 }
 464
 465
 466 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 467                                               void *ctx, struct nlmsghdr *h,
 468                                               size_t len)
 469 {
 470         struct ifinfomsg *ifi;
 471         int attrlen, _nlmsg_len, rta_len;
 472         struct rtattr * attr;
 473
 474         if (len < sizeof(*ifi))
 475                 return;
 476
 477         ifi = NLMSG_DATA(h);
 478
 479         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 480
 481         attrlen = NLMSG_PAYLOAD(h, sizeof(struct ifinfomsg));
 482         if (attrlen < 0)
 483                 return;
 484
 485         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 486
 487         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 488         while (RTA_OK(attr, attrlen)) {
 489                 if (attr->rta_type == IFLA_IFNAME) {
 490                         wpa_driver_nl80211_event_link(
 491                                 drv, ctx,
 492                                 ((char *) attr) + rta_len,
 493                                 attr->rta_len - rta_len, 1);
 494                 }
 495                 attr = RTA_NEXT(attr, attrlen);
 496         }
 497 }
 498
 499
 500 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 501                                                   void *sock_ctx)
 502 {
 503         char buf[8192];
 504         int left;
 505         struct sockaddr_nl from;
 506         socklen_t fromlen;
 507         struct nlmsghdr *h;
 508         int max_events = 10;
 509
 510 try_again:
 511         fromlen = sizeof(from);
 512         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 513                         (struct sockaddr *) &from, &fromlen);
 514         if (left < 0) {
 515                 if (errno != EINTR && errno != EAGAIN)
 516                         perror("recvfrom(netlink)");
 517                 return;
 518         }
 519
 520         h = (struct nlmsghdr *) buf;
 521         while (left >= (int) sizeof(*h)) {
 522                 int len, plen;
 523
 524                 len = h->nlmsg_len;
 525                 plen = len - sizeof(*h);
 526                 if (len > left || plen < 0) {
 527                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 528                                    "len=%d left=%d plen=%d",
 529                                    len, left, plen);
 530                         break;
 531                 }
 532
 533                 switch (h->nlmsg_type) {
 534                 case RTM_NEWLINK:
 535                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 536                                                           h, plen);
 537                         break;
 538                 case RTM_DELLINK:
 539                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 540                                                           h, plen);
 541                         break;
 542                 }
 543
 544                 len = NLMSG_ALIGN(len);
 545                 left -= len;
 546                 h = (struct nlmsghdr *) ((char *) h + len);
 547         }
 548
 549         if (left > 0) {
 550                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 551                            "message", left);
 552         }
 553
 554         if (--max_events > 0) {
 555                 /*
 556                  * Try to receive all events in one eloop call in order to
 557                  * limit race condition on cases where AssocInfo event, Assoc
 558                  * event, and EAPOL frames are received more or less at the
 559                  * same time. We want to process the event messages first
 560                  * before starting EAPOL processing.
 561                  */
 562                 goto try_again;
 563         }
 564 }
 565
 566
 567 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 568                             const u8 *frame, size_t len)
 569 {
 570         const struct ieee80211_mgmt *mgmt;
 571         union wpa_event_data event;
 572
 573         mgmt = (const struct ieee80211_mgmt *) frame;
 574         if (len < 24 + sizeof(mgmt->u.auth)) {
 575                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 576                            "frame");
 577                 return;
 578         }
 579
 580         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 581         os_memset(&event, 0, sizeof(event));
 582         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 583         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 584         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 585         if (len > 24 + sizeof(mgmt->u.auth)) {
 586                 event.auth.ies = mgmt->u.auth.variable;
 587                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 588         }
 589
 590         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 591 }
 592
 593
 594 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 595                             const u8 *frame, size_t len)
 596 {
 597         const struct ieee80211_mgmt *mgmt;
 598         union wpa_event_data event;
 599         u16 status;
 600
 601         mgmt = (const struct ieee80211_mgmt *) frame;
 602         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 603                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 604                            "frame");
 605                 return;
 606         }
 607
 608         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 609         if (status != WLAN_STATUS_SUCCESS) {
 610                 os_memset(&event, 0, sizeof(event));
 611                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 612                         event.assoc_reject.resp_ies =
 613                                 (u8 *) mgmt->u.assoc_resp.variable;
 614                         event.assoc_reject.resp_ies_len =
 615                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 616                 }
 617                 event.assoc_reject.status_code = status;
 618
 619                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 620                 return;
 621         }
 622
 623         drv->associated = 1;
 624         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 625
 626         os_memset(&event, 0, sizeof(event));
 627         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 628                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 629                 event.assoc_info.resp_ies_len =
 630                         len - 24 - sizeof(mgmt->u.assoc_resp);
 631         }
 632
 633         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 634 }
 635
 636
 637 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 638                                enum nl80211_commands cmd, struct nlattr *status,
 639                                struct nlattr *addr, struct nlattr *req_ie,
 640                                struct nlattr *resp_ie)
 641 {
 642         union wpa_event_data event;
 643
 644         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 645                 /*
 646                  * Avoid reporting two association events that would confuse
 647                  * the core code.
 648                  */
 649                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 650                            "when using userspace SME", cmd);
 651                 return;
 652         }
 653
 654         os_memset(&event, 0, sizeof(event));
 655         if (cmd == NL80211_CMD_CONNECT &&
 656             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 657                 if (resp_ie) {
 658                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 659                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 660                 }
 661                 event.assoc_reject.status_code = nla_get_u16(status);
 662                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 663                 return;
 664         }
 665
 666         drv->associated = 1;
 667         if (addr)
 668                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 669
 670         if (req_ie) {
 671                 event.assoc_info.req_ies = nla_data(req_ie);
 672                 event.assoc_info.req_ies_len = nla_len(req_ie);
 673         }
 674         if (resp_ie) {
 675                 event.assoc_info.resp_ies = nla_data(resp_ie);
 676                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 677         }
 678
 679         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 680 }
 681
 682
 683 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 684                                enum nl80211_commands cmd, struct nlattr *addr)
 685 {
 686         union wpa_event_data event;
 687         enum wpa_event_type ev;
 688
 689         if (nla_len(addr) != ETH_ALEN)
 690                 return;
 691
 692         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 693                    cmd, MAC2STR((u8 *) nla_data(addr)));
 694
 695         if (cmd == NL80211_CMD_AUTHENTICATE)
 696                 ev = EVENT_AUTH_TIMED_OUT;
 697         else if (cmd == NL80211_CMD_ASSOCIATE)
 698                 ev = EVENT_ASSOC_TIMED_OUT;
 699         else
 700                 return;
 701
 702         os_memset(&event, 0, sizeof(event));
 703         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 704         wpa_supplicant_event(drv->ctx, ev, &event);
 705 }
 706
 707
 708 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 709                        enum nl80211_commands cmd, struct nlattr *frame,
 710                        struct nlattr *addr, struct nlattr *timed_out)
 711 {
 712         if (timed_out && addr) {
 713                 mlme_timeout_event(drv, cmd, addr);
 714                 return;
 715         }
 716
 717         if (frame == NULL) {
 718                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 719                            "data", cmd);
 720                 return;
 721         }
 722
 723         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 724         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 725                     nla_data(frame), nla_len(frame));
 726
 727         switch (cmd) {
 728         case NL80211_CMD_AUTHENTICATE:
 729                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 730                 break;
 731         case NL80211_CMD_ASSOCIATE:
 732                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 733                 break;
 734         case NL80211_CMD_DEAUTHENTICATE:
 735                 drv->associated = 0;
 736                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 737                 break;
 738         case NL80211_CMD_DISASSOCIATE:
 739                 drv->associated = 0;
 740                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 741                 break;
 742         default:
 743                 break;
 744         }
 745 }
 746
 747
 748 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 749                                            struct nlattr *tb[])
 750 {
 751         union wpa_event_data data;
 752
 753         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 754         os_memset(&data, 0, sizeof(data));
 755         if (tb[NL80211_ATTR_MAC]) {
 756                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 757                             nla_data(tb[NL80211_ATTR_MAC]),
 758                             nla_len(tb[NL80211_ATTR_MAC]));
 759                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 760         }
 761         if (tb[NL80211_ATTR_KEY_SEQ]) {
 762                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 763                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 764                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 765         }
 766         if (tb[NL80211_ATTR_KEY_TYPE]) {
 767                 enum nl80211_key_type key_type =
 768                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 769                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 770                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 771                         data.michael_mic_failure.unicast = 1;
 772         } else
 773                 data.michael_mic_failure.unicast = 1;
 774
 775         if (tb[NL80211_ATTR_KEY_IDX]) {
 776                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 777                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 778         }
 779
 780         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 781 }
 782
 783
 784 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 785                                  struct nlattr *tb[])
 786 {
 787         if (tb[NL80211_ATTR_MAC] == NULL) {
 788                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 789                            "event");
 790                 return;
 791         }
 792         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 793         drv->associated = 1;
 794         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 795                    MAC2STR(drv->bssid));
 796
 797         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 798 }
 799
 800
 801 static int process_event(struct nl_msg *msg, void *arg)
 802 {
 803         struct wpa_driver_nl80211_data *drv = arg;
 804         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 805         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 806
 807         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 808                   genlmsg_attrlen(gnlh, 0), NULL);
 809
 810         if (tb[NL80211_ATTR_IFINDEX]) {
 811                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 812                 if (ifindex != drv->ifindex) {
 813                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 814                                    " for foreign interface (ifindex %d)",
 815                                    gnlh->cmd, ifindex);
 816                         return NL_SKIP;
 817                 }
 818         }
 819
 820         if (drv->ap_scan_as_station &&
 821             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 822              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 823                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 824                 drv->ap_scan_as_station = 0;
 825         }
 826
 827         switch (gnlh->cmd) {
 828         case NL80211_CMD_TRIGGER_SCAN:
 829                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 830                 break;
 831         case NL80211_CMD_NEW_SCAN_RESULTS:
 832                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 833                 drv->scan_complete_events = 1;
 834                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 835                                      drv->ctx);
 836                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 837                 break;
 838         case NL80211_CMD_SCAN_ABORTED:
 839                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 840                 /*
 841                  * Need to indicate that scan results are available in order
 842                  * not to make wpa_supplicant stop its scanning.
 843                  */
 844                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 845                                      drv->ctx);
 846                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 847                 break;
 848         case NL80211_CMD_AUTHENTICATE:
 849         case NL80211_CMD_ASSOCIATE:
 850         case NL80211_CMD_DEAUTHENTICATE:
 851         case NL80211_CMD_DISASSOCIATE:
 852                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 853                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
 854                 break;
 855         case NL80211_CMD_CONNECT:
 856         case NL80211_CMD_ROAM:
 857                 mlme_event_connect(drv, gnlh->cmd,
 858                                    tb[NL80211_ATTR_STATUS_CODE],
 859                                    tb[NL80211_ATTR_MAC],
 860                                    tb[NL80211_ATTR_REQ_IE],
 861                                    tb[NL80211_ATTR_RESP_IE]);
 862                 break;
 863         case NL80211_CMD_DISCONNECT:
 864                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 865                         /*
 866                          * Avoid reporting two disassociation events that could
 867                          * confuse the core code.
 868                          */
 869                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 870                                    "event when using userspace SME");
 871                         break;
 872                 }
 873                 drv->associated = 0;
 874                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 875                 break;
 876         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 877                 mlme_event_michael_mic_failure(drv, tb);
 878                 break;
 879         case NL80211_CMD_JOIN_IBSS:
 880                 mlme_event_join_ibss(drv, tb);
 881                 break;
 882         default:
 883                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 884                            "(cmd=%d)", gnlh->cmd);
 885                 break;
 886         }
 887
 888         return NL_SKIP;
 889 }
 890
 891
 892 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 893                                              void *sock_ctx)
 894 {
 895         struct nl_cb *cb;
 896         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 897
 898         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 899
 900         cb = nl_cb_clone(drv->nl_cb);
 901         if (!cb)
 902                 return;
 903         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 904         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 905         nl_recvmsgs(drv->nl_handle_event, cb);
 906         nl_cb_put(cb);
 907 }
 908
 909
 910 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 911                                    const char *ifname, int dev_up)
 912 {
 913         struct ifreq ifr;
 914
 915         if (drv->ioctl_sock < 0)
 916                 return -1;
 917
 918         os_memset(&ifr, 0, sizeof(ifr));
 919         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 920
 921         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 922                 perror("ioctl[SIOCGIFFLAGS]");
 923                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 924                            ifname);
 925                 return -1;
 926         }
 927
 928         if (dev_up) {
 929                 if (ifr.ifr_flags & IFF_UP)
 930                         return 0;
 931                 ifr.ifr_flags |= IFF_UP;
 932         } else {
 933                 if (!(ifr.ifr_flags & IFF_UP))
 934                         return 0;
 935                 ifr.ifr_flags &= ~IFF_UP;
 936         }
 937
 938         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 939                 perror("ioctl[SIOCSIFFLAGS]");
 940                 return -1;
 941         }
 942
 943         return 0;
 944 }
 945
 946
 947 /**
 948  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 949  * @priv: driver_nl80211 private data
 950  * @alpha2_arg: country to which to switch to
 951  * Returns: 0 on success, -1 on failure
 952  *
 953  * This asks nl80211 to set the regulatory domain for given
 954  * country ISO / IEC alpha2.
 955  */
 956 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 957 {
 958         struct wpa_driver_nl80211_data *drv = priv;
 959         char alpha2[3];
 960         struct nl_msg *msg;
 961
 962         msg = nlmsg_alloc();
 963         if (!msg)
 964                 return -ENOMEM;
 965
 966         alpha2[0] = alpha2_arg[0];
 967         alpha2[1] = alpha2_arg[1];
 968         alpha2[2] = '\0';
 969
 970         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 971                     0, NL80211_CMD_REQ_SET_REG, 0);
 972
 973         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 974         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 975                 return -EINVAL;
 976         return 0;
 977 nla_put_failure:
 978         return -EINVAL;
 979 }
 980
 981
 982 #ifndef HOSTAPD
 983 struct wiphy_info_data {
 984         int max_scan_ssids;
 985         int ap_supported;
 986         int auth_supported;
 987         int connect_supported;
 988 };
 989
 990
 991 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 992 {
 993         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 994         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 995         struct wiphy_info_data *info = arg;
 996
 997         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 998                   genlmsg_attrlen(gnlh, 0), NULL);
 999
1000         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1001                 info->max_scan_ssids =
1002                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1003
1004         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1005                 struct nlattr *nl_mode;
1006                 int i;
1007                 nla_for_each_nested(nl_mode,
1008                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1009                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1010                                 info->ap_supported = 1;
1011                                 break;
1012                         }
1013                 }
1014         }
1015
1016         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1017                 struct nlattr *nl_cmd;
1018                 int i;
1019
1020                 nla_for_each_nested(nl_cmd,
1021                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1022                         u32 cmd = nla_get_u32(nl_cmd);
1023                         if (cmd == NL80211_CMD_AUTHENTICATE)
1024                                 info->auth_supported = 1;
1025                         else if (cmd == NL80211_CMD_CONNECT)
1026                                 info->connect_supported = 1;
1027                 }
1028         }
1029
1030         return NL_SKIP;
1031 }
1032
1033
1034 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1035                                        struct wiphy_info_data *info)
1036 {
1037         struct nl_msg *msg;
1038
1039         os_memset(info, 0, sizeof(*info));
1040         msg = nlmsg_alloc();
1041         if (!msg)
1042                 return -1;
1043
1044         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1045                     0, NL80211_CMD_GET_WIPHY, 0);
1046
1047         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1048
1049         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1050                 return 0;
1051         msg = NULL;
1052 nla_put_failure:
1053         nlmsg_free(msg);
1054         return -1;
1055 }
1056
1057
1058 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1059 {
1060         struct wiphy_info_data info;
1061         if (wpa_driver_nl80211_get_info(drv, &info))
1062                 return -1;
1063         drv->has_capability = 1;
1064         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1065         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1066                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1067                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1068                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1069         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1070                 WPA_DRIVER_CAPA_ENC_WEP104 |
1071                 WPA_DRIVER_CAPA_ENC_TKIP |
1072                 WPA_DRIVER_CAPA_ENC_CCMP;
1073
1074         drv->capa.max_scan_ssids = info.max_scan_ssids;
1075         if (info.ap_supported)
1076                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1077
1078         if (info.auth_supported)
1079                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1080         else if (!info.connect_supported) {
1081                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1082                            "authentication/association or connect commands");
1083                 return -1;
1084         }
1085
1086         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1087
1088         return 0;
1089 }
1090 #endif /* HOSTAPD */
1091
1092
1093 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1094                                       void *ctx)
1095 {
1096         int ret;
1097
1098         /* Initialize generic netlink and nl80211 */
1099
1100         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1101         if (drv->nl_cb == NULL) {
1102                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1103                            "callbacks");
1104                 goto err1;
1105         }
1106
1107         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1108         if (drv->nl_handle == NULL) {
1109                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1110                            "callbacks");
1111                 goto err2;
1112         }
1113
1114         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1115         if (drv->nl_handle_event == NULL) {
1116                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1117                            "callbacks (event)");
1118                 goto err2b;
1119         }
1120
1121         if (genl_connect(drv->nl_handle)) {
1122                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1123                            "netlink");
1124                 goto err3;
1125         }
1126
1127         if (genl_connect(drv->nl_handle_event)) {
1128                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1129                            "netlink (event)");
1130                 goto err3;
1131         }
1132
1133 #ifdef CONFIG_LIBNL20
1134         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1135                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1136                            "netlink cache");
1137                 goto err3;
1138         }
1139         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1140             0) {
1141                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1142                            "netlink cache (event)");
1143                 goto err3b;
1144         }
1145 #else /* CONFIG_LIBNL20 */
1146         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1147         if (drv->nl_cache == NULL) {
1148                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1149                            "netlink cache");
1150                 goto err3;
1151         }
1152         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1153         if (drv->nl_cache_event == NULL) {
1154                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1155                            "netlink cache (event)");
1156                 goto err3b;
1157         }
1158 #endif /* CONFIG_LIBNL20 */
1159
1160         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1161         if (drv->nl80211 == NULL) {
1162                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1163                            "found");
1164                 goto err4;
1165         }
1166
1167         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1168         if (ret >= 0)
1169                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1170         if (ret < 0) {
1171                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1172                            "membership for scan events: %d (%s)",
1173                            ret, strerror(-ret));
1174                 goto err4;
1175         }
1176
1177         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1178         if (ret >= 0)
1179                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1180         if (ret < 0) {
1181                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1182                            "membership for mlme events: %d (%s)",
1183                            ret, strerror(-ret));
1184                 goto err4;
1185         }
1186
1187         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1188                                  wpa_driver_nl80211_event_receive, drv, ctx);
1189
1190         return 0;
1191
1192 err4:
1193         nl_cache_free(drv->nl_cache_event);
1194 err3b:
1195         nl_cache_free(drv->nl_cache);
1196 err3:
1197         nl_handle_destroy(drv->nl_handle_event);
1198 err2b:
1199         nl_handle_destroy(drv->nl_handle);
1200 err2:
1201         nl_cb_put(drv->nl_cb);
1202 err1:
1203         return -1;
1204 }
1205
1206
1207 static int wpa_driver_nl80211_init_link_events(
1208         struct wpa_driver_nl80211_data *drv)
1209 {
1210         int s;
1211         struct sockaddr_nl local;
1212
1213         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1214         if (s < 0) {
1215                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1216                 return -1;
1217         }
1218
1219         os_memset(&local, 0, sizeof(local));
1220         local.nl_family = AF_NETLINK;
1221         local.nl_groups = RTMGRP_LINK;
1222         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1223                 perror("bind(netlink)");
1224                 close(s);
1225                 return -1;
1226         }
1227
1228         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1229                                  drv->ctx);
1230         drv->link_event_sock = s;
1231
1232         return 0;
1233 }
1234
1235
1236 /**
1237  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1238  * @ctx: context to be used when calling wpa_supplicant functions,
1239  * e.g., wpa_supplicant_event()
1240  * @ifname: interface name, e.g., wlan0
1241  * Returns: Pointer to private data, %NULL on failure
1242  */
1243 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1244 {
1245         struct wpa_driver_nl80211_data *drv;
1246
1247         drv = os_zalloc(sizeof(*drv));
1248         if (drv == NULL)
1249                 return NULL;
1250         drv->ctx = ctx;
1251         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1252         drv->monitor_ifidx = -1;
1253         drv->monitor_sock = -1;
1254         drv->link_event_sock = -1;
1255         drv->ioctl_sock = -1;
1256
1257         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1258                 os_free(drv);
1259                 return NULL;
1260         }
1261
1262         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1263         if (drv->ioctl_sock < 0) {
1264                 perror("socket(PF_INET,SOCK_DGRAM)");
1265                 goto failed;
1266         }
1267
1268         if (wpa_driver_nl80211_init_link_events(drv) ||
1269             wpa_driver_nl80211_finish_drv_init(drv))
1270                 goto failed;
1271
1272         return drv;
1273
1274 failed:
1275         if (drv->link_event_sock >= 0) {
1276                 eloop_unregister_read_sock(drv->link_event_sock);
1277                 close(drv->link_event_sock);
1278         }
1279         if (drv->ioctl_sock >= 0)
1280                 close(drv->ioctl_sock);
1281
1282         genl_family_put(drv->nl80211);
1283         nl_cache_free(drv->nl_cache);
1284         nl_handle_destroy(drv->nl_handle);
1285         nl_cb_put(drv->nl_cb);
1286
1287         os_free(drv);
1288         return NULL;
1289 }
1290
1291
1292 static int
1293 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1294 {
1295         drv->ifindex = if_nametoindex(drv->ifname);
1296
1297 #ifndef HOSTAPD
1298         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1299                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1300                            "use managed mode");
1301         }
1302
1303         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1304                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1305                            "UP", drv->ifname);
1306                 return -1;
1307         }
1308
1309         if (wpa_driver_nl80211_capa(drv))
1310                 return -1;
1311
1312         netlink_send_oper_ifla(drv->link_event_sock, drv->ifindex,
1313                                1, IF_OPER_DORMANT);
1314 #endif /* HOSTAPD */
1315
1316         return 0;
1317 }
1318
1319
1320 #ifdef HOSTAPD
1321 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1322 {
1323         struct i802_bss *bss, *prev;
1324         bss = drv->bss.next;
1325         while (bss) {
1326                 prev = bss;
1327                 bss = bss->next;
1328                 os_free(bss);
1329         }
1330 }
1331 #endif /* HOSTAPD */
1332
1333
1334 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1335 {
1336         struct nl_msg *msg;
1337
1338         msg = nlmsg_alloc();
1339         if (!msg)
1340                 return -ENOMEM;
1341
1342         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1343                     0, NL80211_CMD_DEL_BEACON, 0);
1344         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1345
1346         return send_and_recv_msgs(drv, msg, NULL, NULL);
1347  nla_put_failure:
1348         return -ENOBUFS;
1349 }
1350
1351
1352 /**
1353  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1354  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1355  *
1356  * Shut down driver interface and processing of driver events. Free
1357  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1358  */
1359 static void wpa_driver_nl80211_deinit(void *priv)
1360 {
1361         struct wpa_driver_nl80211_data *drv = priv;
1362
1363         nl80211_remove_monitor_interface(drv);
1364         if (drv->monitor_sock >= 0) {
1365                 eloop_unregister_read_sock(drv->monitor_sock);
1366                 close(drv->monitor_sock);
1367         }
1368
1369         if (drv->nlmode == NL80211_IFTYPE_AP)
1370                 wpa_driver_nl80211_del_beacon(drv);
1371
1372 #ifdef HOSTAPD
1373         if (drv->last_freq_ht) {
1374                 /* Clear HT flags from the driver */
1375                 struct hostapd_freq_params freq;
1376                 os_memset(&freq, 0, sizeof(freq));
1377                 freq.freq = drv->last_freq;
1378                 i802_set_freq(priv, &freq);
1379         }
1380
1381         if (drv->eapol_sock >= 0) {
1382                 eloop_unregister_read_sock(drv->eapol_sock);
1383                 close(drv->eapol_sock);
1384         }
1385
1386         if (drv->if_indices != drv->default_if_indices)
1387                 os_free(drv->if_indices);
1388
1389         wpa_driver_nl80211_free_bss(drv);
1390 #endif /* HOSTAPD */
1391
1392         netlink_send_oper_ifla(drv->link_event_sock, drv->ifindex,
1393                                0, IF_OPER_UP);
1394
1395         if (drv->link_event_sock >= 0) {
1396                 eloop_unregister_read_sock(drv->link_event_sock);
1397                 close(drv->link_event_sock);
1398         }
1399
1400         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1401
1402         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1403         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1404
1405         if (drv->ioctl_sock >= 0)
1406                 close(drv->ioctl_sock);
1407
1408         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1409         genl_family_put(drv->nl80211);
1410         nl_cache_free(drv->nl_cache);
1411         nl_cache_free(drv->nl_cache_event);
1412         nl_handle_destroy(drv->nl_handle);
1413         nl_handle_destroy(drv->nl_handle_event);
1414         nl_cb_put(drv->nl_cb);
1415
1416         os_free(drv);
1417 }
1418
1419
1420 /**
1421  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1422  * @eloop_ctx: Driver private data
1423  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1424  *
1425  * This function can be used as registered timeout when starting a scan to
1426  * generate a scan completed event if the driver does not report this.
1427  */
1428 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1429 {
1430         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1431         if (drv->ap_scan_as_station) {
1432                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1433                 drv->ap_scan_as_station = 0;
1434         }
1435         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1436         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1437 }
1438
1439
1440 /**
1441  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1442  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1443  * @params: Scan parameters
1444  * Returns: 0 on success, -1 on failure
1445  */
1446 static int wpa_driver_nl80211_scan(void *priv,
1447                                    struct wpa_driver_scan_params *params)
1448 {
1449         struct wpa_driver_nl80211_data *drv = priv;
1450         int ret = 0, timeout;
1451         struct nl_msg *msg, *ssids, *freqs;
1452         size_t i;
1453
1454         msg = nlmsg_alloc();
1455         ssids = nlmsg_alloc();
1456         freqs = nlmsg_alloc();
1457         if (!msg || !ssids || !freqs) {
1458                 nlmsg_free(msg);
1459                 nlmsg_free(ssids);
1460                 nlmsg_free(freqs);
1461                 return -1;
1462         }
1463
1464         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1465                     NL80211_CMD_TRIGGER_SCAN, 0);
1466
1467         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1468
1469         for (i = 0; i < params->num_ssids; i++) {
1470                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1471                         params->ssids[i].ssid);
1472         }
1473         if (params->num_ssids)
1474                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1475
1476         if (params->extra_ies) {
1477                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1478                         params->extra_ies);
1479         }
1480
1481         if (params->freqs) {
1482                 for (i = 0; params->freqs[i]; i++)
1483                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1484                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1485         }
1486
1487         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1488         msg = NULL;
1489         if (ret) {
1490                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1491                            "(%s)", ret, strerror(-ret));
1492 #ifdef HOSTAPD
1493                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1494                         /*
1495                          * mac80211 does not allow scan requests in AP mode, so
1496                          * try to do this in station mode.
1497                          */
1498                         if (wpa_driver_nl80211_set_mode(drv,
1499                                                         IEEE80211_MODE_INFRA))
1500                                 goto nla_put_failure;
1501
1502                         if (wpa_driver_nl80211_scan(drv, params)) {
1503                                 wpa_driver_nl80211_set_mode(drv,
1504                                                             IEEE80211_MODE_AP);
1505                                 goto nla_put_failure;
1506                         }
1507
1508                         /* Restore AP mode when processing scan results */
1509                         drv->ap_scan_as_station = 1;
1510                         ret = 0;
1511                 } else
1512                         goto nla_put_failure;
1513 #else /* HOSTAPD */
1514                 goto nla_put_failure;
1515 #endif /* HOSTAPD */
1516         }
1517
1518         /* Not all drivers generate "scan completed" wireless event, so try to
1519          * read results after a timeout. */
1520         timeout = 10;
1521         if (drv->scan_complete_events) {
1522                 /*
1523                  * The driver seems to deliver events to notify when scan is
1524                  * complete, so use longer timeout to avoid race conditions
1525                  * with scanning and following association request.
1526                  */
1527                 timeout = 30;
1528         }
1529         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1530                    "seconds", ret, timeout);
1531         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1532         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1533                                drv, drv->ctx);
1534
1535 nla_put_failure:
1536         nlmsg_free(ssids);
1537         nlmsg_free(msg);
1538         nlmsg_free(freqs);
1539         return ret;
1540 }
1541
1542
1543 static int bss_info_handler(struct nl_msg *msg, void *arg)
1544 {
1545         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1546         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1547         struct nlattr *bss[NL80211_BSS_MAX + 1];
1548         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1549                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1550                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1551                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1552                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1553                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1554                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1555                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1556                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1557                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1558                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1559         };
1560         struct wpa_scan_results *res = arg;
1561         struct wpa_scan_res **tmp;
1562         struct wpa_scan_res *r;
1563         const u8 *ie;
1564         size_t ie_len;
1565
1566         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1567                   genlmsg_attrlen(gnlh, 0), NULL);
1568         if (!tb[NL80211_ATTR_BSS])
1569                 return NL_SKIP;
1570         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1571                              bss_policy))
1572                 return NL_SKIP;
1573         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1574                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1575                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1576         } else {
1577                 ie = NULL;
1578                 ie_len = 0;
1579         }
1580
1581         r = os_zalloc(sizeof(*r) + ie_len);
1582         if (r == NULL)
1583                 return NL_SKIP;
1584         if (bss[NL80211_BSS_BSSID])
1585                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1586                           ETH_ALEN);
1587         if (bss[NL80211_BSS_FREQUENCY])
1588                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1589         if (bss[NL80211_BSS_BEACON_INTERVAL])
1590                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1591         if (bss[NL80211_BSS_CAPABILITY])
1592                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1593         r->flags |= WPA_SCAN_NOISE_INVALID;
1594         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1595                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1596                 r->level /= 100; /* mBm to dBm */
1597                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1598         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1599                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1600                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1601         } else
1602                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1603         if (bss[NL80211_BSS_TSF])
1604                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1605         if (bss[NL80211_BSS_SEEN_MS_AGO])
1606                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1607         r->ie_len = ie_len;
1608         if (ie)
1609                 os_memcpy(r + 1, ie, ie_len);
1610
1611         if (bss[NL80211_BSS_STATUS]) {
1612                 enum nl80211_bss_status status;
1613                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1614                 switch (status) {
1615                 case NL80211_BSS_STATUS_AUTHENTICATED:
1616                         r->flags |= WPA_SCAN_AUTHENTICATED;
1617                         break;
1618                 case NL80211_BSS_STATUS_ASSOCIATED:
1619                         r->flags |= WPA_SCAN_ASSOCIATED;
1620                         break;
1621                 default:
1622                         break;
1623                 }
1624         }
1625
1626         tmp = os_realloc(res->res,
1627                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1628         if (tmp == NULL) {
1629                 os_free(r);
1630                 return NL_SKIP;
1631         }
1632         tmp[res->num++] = r;
1633         res->res = tmp;
1634
1635         return NL_SKIP;
1636 }
1637
1638
1639 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1640                                  const u8 *addr)
1641 {
1642         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1643                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1644                            "mismatch");
1645                 wpa_driver_nl80211_mlme(drv, addr,
1646                                         NL80211_CMD_DEAUTHENTICATE,
1647                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1648         }
1649 }
1650
1651
1652 static void wpa_driver_nl80211_check_bss_status(
1653         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1654 {
1655         size_t i;
1656
1657         for (i = 0; i < res->num; i++) {
1658                 struct wpa_scan_res *r = res->res[i];
1659                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1660                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1661                                    "indicates BSS status with " MACSTR
1662                                    " as authenticated",
1663                                    MAC2STR(r->bssid));
1664                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1665                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1666                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1667                             0) {
1668                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1669                                            " in local state (auth=" MACSTR
1670                                            " assoc=" MACSTR ")",
1671                                            MAC2STR(drv->auth_bssid),
1672                                            MAC2STR(drv->bssid));
1673                         }
1674                 }
1675
1676                 if (r->flags & WPA_SCAN_ASSOCIATED) {
1677                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1678                                    "indicate BSS status with " MACSTR
1679                                    " as associated",
1680                                    MAC2STR(r->bssid));
1681                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1682                             !drv->associated) {
1683                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1684                                            "(not associated) does not match "
1685                                            "with BSS state");
1686                                 clear_state_mismatch(drv, r->bssid);
1687                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1688                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1689                                    0) {
1690                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1691                                            "(associated with " MACSTR ") does "
1692                                            "not match with BSS state",
1693                                            MAC2STR(drv->bssid));
1694                                 clear_state_mismatch(drv, r->bssid);
1695                                 clear_state_mismatch(drv, drv->bssid);
1696                         }
1697                 }
1698         }
1699 }
1700
1701
1702 /**
1703  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1704  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1705  * Returns: Scan results on success, -1 on failure
1706  */
1707 static struct wpa_scan_results *
1708 wpa_driver_nl80211_get_scan_results(void *priv)
1709 {
1710         struct wpa_driver_nl80211_data *drv = priv;
1711         struct nl_msg *msg;
1712         struct wpa_scan_results *res;
1713         int ret;
1714
1715         res = os_zalloc(sizeof(*res));
1716         if (res == NULL)
1717                 return NULL;
1718         msg = nlmsg_alloc();
1719         if (!msg)
1720                 goto nla_put_failure;
1721
1722         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1723                     NL80211_CMD_GET_SCAN, 0);
1724         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1725
1726         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1727         msg = NULL;
1728         if (ret == 0) {
1729                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1730                            (unsigned long) res->num);
1731                 wpa_driver_nl80211_check_bss_status(drv, res);
1732                 return res;
1733         }
1734         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1735                    "(%s)", ret, strerror(-ret));
1736 nla_put_failure:
1737         nlmsg_free(msg);
1738         wpa_scan_results_free(res);
1739         return NULL;
1740 }
1741
1742
1743 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1744                                       wpa_alg alg, const u8 *addr, int key_idx,
1745                                       int set_tx,
1746                                       const u8 *seq, size_t seq_len,
1747                                       const u8 *key, size_t key_len)
1748 {
1749         struct wpa_driver_nl80211_data *drv = priv;
1750         int ifindex = if_nametoindex(ifname);
1751         struct nl_msg *msg;
1752         int ret;
1753
1754         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1755                    "set_tx=%d seq_len=%lu key_len=%lu",
1756                    __func__, ifindex, alg, addr, key_idx, set_tx,
1757                    (unsigned long) seq_len, (unsigned long) key_len);
1758
1759         msg = nlmsg_alloc();
1760         if (!msg)
1761                 return -ENOMEM;
1762
1763         if (alg == WPA_ALG_NONE) {
1764                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1765                             0, NL80211_CMD_DEL_KEY, 0);
1766         } else {
1767                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1768                             0, NL80211_CMD_NEW_KEY, 0);
1769                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1770                 switch (alg) {
1771                 case WPA_ALG_WEP:
1772                         if (key_len == 5)
1773                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1774                                             WLAN_CIPHER_SUITE_WEP40);
1775                         else
1776                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1777                                             WLAN_CIPHER_SUITE_WEP104);
1778                         break;
1779                 case WPA_ALG_TKIP:
1780                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1781                                     WLAN_CIPHER_SUITE_TKIP);
1782                         break;
1783                 case WPA_ALG_CCMP:
1784                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1785                                     WLAN_CIPHER_SUITE_CCMP);
1786                         break;
1787                 case WPA_ALG_IGTK:
1788                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1789                                     WLAN_CIPHER_SUITE_AES_CMAC);
1790                         break;
1791                 default:
1792                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1793                                    "algorithm %d", __func__, alg);
1794                         nlmsg_free(msg);
1795                         return -1;
1796                 }
1797         }
1798
1799         if (seq && seq_len)
1800                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1801
1802         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1803         {
1804                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1805                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1806         }
1807         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1808         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1809
1810         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1811         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1812                 ret = 0;
1813         if (ret)
1814                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1815                            ret, strerror(-ret));
1816
1817         /*
1818          * If we failed or don't need to set the default TX key (below),
1819          * we're done here.
1820          */
1821         if (ret || !set_tx || alg == WPA_ALG_NONE)
1822                 return ret;
1823 #ifdef HOSTAPD /* FIX: is this needed? */
1824         if (addr)
1825                 return ret;
1826 #endif /* HOSTAPD */
1827
1828         msg = nlmsg_alloc();
1829         if (!msg)
1830                 return -ENOMEM;
1831
1832         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1833                     0, NL80211_CMD_SET_KEY, 0);
1834         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1835         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1836         if (alg == WPA_ALG_IGTK)
1837                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1838         else
1839                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1840
1841         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1842         if (ret == -ENOENT)
1843                 ret = 0;
1844         if (ret)
1845                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1846                            "err=%d %s)", ret, strerror(-ret));
1847         return ret;
1848
1849 nla_put_failure:
1850         return -ENOBUFS;
1851 }
1852
1853
1854 static int nl_add_key(struct nl_msg *msg, wpa_alg alg,
1855                       int key_idx, int defkey,
1856                       const u8 *seq, size_t seq_len,
1857                       const u8 *key, size_t key_len)
1858 {
1859         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1860         if (!key_attr)
1861                 return -1;
1862
1863         if (defkey && alg == WPA_ALG_IGTK)
1864                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1865         else if (defkey)
1866                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1867
1868         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1869
1870         switch (alg) {
1871         case WPA_ALG_WEP:
1872                 if (key_len == 5)
1873                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1874                                     WLAN_CIPHER_SUITE_WEP40);
1875                 else
1876                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1877                                     WLAN_CIPHER_SUITE_WEP104);
1878                 break;
1879         case WPA_ALG_TKIP:
1880                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1881                 break;
1882         case WPA_ALG_CCMP:
1883                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1884                 break;
1885         case WPA_ALG_IGTK:
1886                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1887                             WLAN_CIPHER_SUITE_AES_CMAC);
1888                 break;
1889         default:
1890                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1891                            "algorithm %d", __func__, alg);
1892                 return -1;
1893         }
1894
1895         if (seq && seq_len)
1896                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1897
1898         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1899
1900         nla_nest_end(msg, key_attr);
1901
1902         return 0;
1903  nla_put_failure:
1904         return -1;
1905 }
1906
1907
1908 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1909                                  struct nl_msg *msg)
1910 {
1911         int i, privacy = 0;
1912         struct nlattr *nl_keys, *nl_key;
1913
1914         for (i = 0; i < 4; i++) {
1915                 if (!params->wep_key[i])
1916                         continue;
1917                 privacy = 1;
1918                 break;
1919         }
1920         if (!privacy)
1921                 return 0;
1922
1923         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1924
1925         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1926         if (!nl_keys)
1927                 goto nla_put_failure;
1928
1929         for (i = 0; i < 4; i++) {
1930                 if (!params->wep_key[i])
1931                         continue;
1932
1933                 nl_key = nla_nest_start(msg, i);
1934                 if (!nl_key)
1935                         goto nla_put_failure;
1936
1937                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1938                         params->wep_key[i]);
1939                 if (params->wep_key_len[i] == 5)
1940                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1941                                     WLAN_CIPHER_SUITE_WEP40);
1942                 else
1943                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1944                                     WLAN_CIPHER_SUITE_WEP104);
1945
1946                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1947
1948                 if (i == params->wep_tx_keyidx)
1949                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1950
1951                 nla_nest_end(msg, nl_key);
1952         }
1953         nla_nest_end(msg, nl_keys);
1954
1955         return 0;
1956
1957 nla_put_failure:
1958         return -ENOBUFS;
1959 }
1960
1961
1962 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1963                                    const u8 *addr, int cmd, u16 reason_code)
1964 {
1965         int ret = -1;
1966         struct nl_msg *msg;
1967
1968         msg = nlmsg_alloc();
1969         if (!msg)
1970                 return -1;
1971
1972         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1973
1974         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1975         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1976         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1977
1978         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1979         msg = NULL;
1980         if (ret) {
1981                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1982                            "(%s)", ret, strerror(-ret));
1983                 goto nla_put_failure;
1984         }
1985         ret = 0;
1986
1987 nla_put_failure:
1988         nlmsg_free(msg);
1989         return ret;
1990 }
1991
1992
1993 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
1994                                          const u8 *addr, int reason_code)
1995 {
1996         wpa_printf(MSG_DEBUG, "%s", __func__);
1997         drv->associated = 0;
1998         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
1999                                        reason_code);
2000 }
2001
2002
2003 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2004                                              int reason_code)
2005 {
2006         struct wpa_driver_nl80211_data *drv = priv;
2007         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2008                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2009         wpa_printf(MSG_DEBUG, "%s", __func__);
2010         drv->associated = 0;
2011         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2012                                        reason_code);
2013 }
2014
2015
2016 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2017                                            int reason_code)
2018 {
2019         struct wpa_driver_nl80211_data *drv = priv;
2020         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2021                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2022         wpa_printf(MSG_DEBUG, "%s", __func__);
2023         drv->associated = 0;
2024         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2025                                        reason_code);
2026 }
2027
2028
2029 static int wpa_driver_nl80211_authenticate(
2030         void *priv, struct wpa_driver_auth_params *params)
2031 {
2032         struct wpa_driver_nl80211_data *drv = priv;
2033         int ret = -1, i;
2034         struct nl_msg *msg;
2035         enum nl80211_auth_type type;
2036         int count = 0;
2037
2038         drv->associated = 0;
2039         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2040
2041         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
2042                 return -1;
2043
2044 retry:
2045         msg = nlmsg_alloc();
2046         if (!msg)
2047                 return -1;
2048
2049         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2050                    drv->ifindex);
2051
2052         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2053                     NL80211_CMD_AUTHENTICATE, 0);
2054
2055         for (i = 0; i < 4; i++) {
2056                 if (!params->wep_key[i])
2057                         continue;
2058                 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
2059                                            i,
2060                                            i == params->wep_tx_keyidx, NULL, 0,
2061                                            params->wep_key[i],
2062                                            params->wep_key_len[i]);
2063                 if (params->wep_tx_keyidx != i)
2064                         continue;
2065                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2066                                params->wep_key[i], params->wep_key_len[i])) {
2067                         nlmsg_free(msg);
2068                         return -1;
2069                 }
2070         }
2071
2072         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2073         if (params->bssid) {
2074                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2075                            MAC2STR(params->bssid));
2076                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2077         }
2078         if (params->freq) {
2079                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2080                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2081         }
2082         if (params->ssid) {
2083                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2084                                   params->ssid, params->ssid_len);
2085                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2086                         params->ssid);
2087         }
2088         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2089         if (params->ie)
2090                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2091         /*
2092          * TODO: if multiple auth_alg options enabled, try them one by one if
2093          * the AP rejects authentication due to unknown auth alg
2094          */
2095         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2096                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2097         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2098                 type = NL80211_AUTHTYPE_SHARED_KEY;
2099         else if (params->auth_alg & AUTH_ALG_LEAP)
2100                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2101         else if (params->auth_alg & AUTH_ALG_FT)
2102                 type = NL80211_AUTHTYPE_FT;
2103         else
2104                 goto nla_put_failure;
2105         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2106         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2107
2108         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2109         msg = NULL;
2110         if (ret) {
2111                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2112                            "(%s)", ret, strerror(-ret));
2113                 count++;
2114                 if (ret == -EALREADY && count == 1 && params->bssid) {
2115                         /*
2116                          * mac80211 does not currently accept new
2117                          * authentication if we are already authenticated. As a
2118                          * workaround, force deauthentication and try again.
2119                          */
2120                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2121                                    "after forced deauthentication");
2122                         wpa_driver_nl80211_deauthenticate(
2123                                 drv, params->bssid,
2124                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2125                         nlmsg_free(msg);
2126                         goto retry;
2127                 }
2128                 goto nla_put_failure;
2129         }
2130         ret = 0;
2131         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2132                    "successfully");
2133
2134 nla_put_failure:
2135         nlmsg_free(msg);
2136         return ret;
2137 }
2138
2139
2140 struct phy_info_arg {
2141         u16 *num_modes;
2142         struct hostapd_hw_modes *modes;
2143 };
2144
2145 static int phy_info_handler(struct nl_msg *msg, void *arg)
2146 {
2147         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2148         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2149         struct phy_info_arg *phy_info = arg;
2150
2151         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2152
2153         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2154         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2155                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2156                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2157                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2158                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2159                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2160                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2161         };
2162
2163         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2164         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2165                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2166                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2167         };
2168
2169         struct nlattr *nl_band;
2170         struct nlattr *nl_freq;
2171         struct nlattr *nl_rate;
2172         int rem_band, rem_freq, rem_rate;
2173         struct hostapd_hw_modes *mode;
2174         int idx, mode_is_set;
2175
2176         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2177                   genlmsg_attrlen(gnlh, 0), NULL);
2178
2179         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2180                 return NL_SKIP;
2181
2182         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2183                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2184                 if (!mode)
2185                         return NL_SKIP;
2186                 phy_info->modes = mode;
2187
2188                 mode_is_set = 0;
2189
2190                 mode = &phy_info->modes[*(phy_info->num_modes)];
2191                 memset(mode, 0, sizeof(*mode));
2192                 *(phy_info->num_modes) += 1;
2193
2194                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2195                           nla_len(nl_band), NULL);
2196
2197                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2198                         mode->ht_capab = nla_get_u16(
2199                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2200                 }
2201
2202                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2203                         mode->a_mpdu_params |= nla_get_u8(
2204                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2205                                 0x03;
2206                 }
2207
2208                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2209                         mode->a_mpdu_params |= nla_get_u8(
2210                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2211                                 2;
2212                 }
2213
2214                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2215                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2216                         u8 *mcs;
2217                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2218                         os_memcpy(mode->mcs_set, mcs, 16);
2219                 }
2220
2221                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2222                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2223                                   nla_len(nl_freq), freq_policy);
2224                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2225                                 continue;
2226                         mode->num_channels++;
2227                 }
2228
2229                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
2230                 if (!mode->channels)
2231                         return NL_SKIP;
2232
2233                 idx = 0;
2234
2235                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2236                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2237                                   nla_len(nl_freq), freq_policy);
2238                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2239                                 continue;
2240
2241                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2242                         mode->channels[idx].flag = 0;
2243
2244                         if (!mode_is_set) {
2245                                 /* crude heuristic */
2246                                 if (mode->channels[idx].freq < 4000)
2247                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2248                                 else
2249                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2250                                 mode_is_set = 1;
2251                         }
2252
2253                         /* crude heuristic */
2254                         if (mode->channels[idx].freq < 4000)
2255                                 if (mode->channels[idx].freq == 2484)
2256                                         mode->channels[idx].chan = 14;
2257                                 else
2258                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2259                         else
2260                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2261
2262                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2263                                 mode->channels[idx].flag |=
2264                                         HOSTAPD_CHAN_DISABLED;
2265                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2266                                 mode->channels[idx].flag |=
2267                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2268                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2269                                 mode->channels[idx].flag |=
2270                                         HOSTAPD_CHAN_NO_IBSS;
2271                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2272                                 mode->channels[idx].flag |=
2273                                         HOSTAPD_CHAN_RADAR;
2274
2275                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2276                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2277                                 mode->channels[idx].max_tx_power =
2278                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2279
2280                         idx++;
2281                 }
2282
2283                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2284                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2285                                   nla_len(nl_rate), rate_policy);
2286                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2287                                 continue;
2288                         mode->num_rates++;
2289                 }
2290
2291                 mode->rates = calloc(mode->num_rates, sizeof(int));
2292                 if (!mode->rates)
2293                         return NL_SKIP;
2294
2295                 idx = 0;
2296
2297                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2298                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2299                                   nla_len(nl_rate), rate_policy);
2300                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2301                                 continue;
2302                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2303
2304                         /* crude heuristic */
2305                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2306                             mode->rates[idx] > 200)
2307                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2308
2309                         idx++;
2310                 }
2311         }
2312
2313         return NL_SKIP;
2314 }
2315
2316 static struct hostapd_hw_modes *
2317 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2318 {
2319         u16 m;
2320         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2321         int i, mode11g_idx = -1;
2322
2323         /* If only 802.11g mode is included, use it to construct matching
2324          * 802.11b mode data. */
2325
2326         for (m = 0; m < *num_modes; m++) {
2327                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2328                         return modes; /* 802.11b already included */
2329                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2330                         mode11g_idx = m;
2331         }
2332
2333         if (mode11g_idx < 0)
2334                 return modes; /* 2.4 GHz band not supported at all */
2335
2336         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2337         if (nmodes == NULL)
2338                 return modes; /* Could not add 802.11b mode */
2339
2340         mode = &nmodes[*num_modes];
2341         os_memset(mode, 0, sizeof(*mode));
2342         (*num_modes)++;
2343         modes = nmodes;
2344
2345         mode->mode = HOSTAPD_MODE_IEEE80211B;
2346
2347         mode11g = &modes[mode11g_idx];
2348         mode->num_channels = mode11g->num_channels;
2349         mode->channels = os_malloc(mode11g->num_channels *
2350                                    sizeof(struct hostapd_channel_data));
2351         if (mode->channels == NULL) {
2352                 (*num_modes)--;
2353                 return modes; /* Could not add 802.11b mode */
2354         }
2355         os_memcpy(mode->channels, mode11g->channels,
2356                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2357
2358         mode->num_rates = 0;
2359         mode->rates = os_malloc(4 * sizeof(int));
2360         if (mode->rates == NULL) {
2361                 os_free(mode->channels);
2362                 (*num_modes)--;
2363                 return modes; /* Could not add 802.11b mode */
2364         }
2365
2366         for (i = 0; i < mode11g->num_rates; i++) {
2367                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2368                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2369                         continue;
2370                 mode->rates[mode->num_rates] = mode11g->rates[i];
2371                 mode->num_rates++;
2372                 if (mode->num_rates == 4)
2373                         break;
2374         }
2375
2376         if (mode->num_rates == 0) {
2377                 os_free(mode->channels);
2378                 os_free(mode->rates);
2379                 (*num_modes)--;
2380                 return modes; /* No 802.11b rates */
2381         }
2382
2383         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2384                    "information");
2385
2386         return modes;
2387 }
2388
2389
2390 static struct hostapd_hw_modes *
2391 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2392 {
2393         struct wpa_driver_nl80211_data *drv = priv;
2394         struct nl_msg *msg;
2395         struct phy_info_arg result = {
2396                 .num_modes = num_modes,
2397                 .modes = NULL,
2398         };
2399
2400         *num_modes = 0;
2401         *flags = 0;
2402
2403         msg = nlmsg_alloc();
2404         if (!msg)
2405                 return NULL;
2406
2407         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2408                     0, NL80211_CMD_GET_WIPHY, 0);
2409
2410         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2411
2412         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2413                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2414  nla_put_failure:
2415         return NULL;
2416 }
2417
2418
2419 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2420                                          const void *data, size_t len,
2421                                          int encrypt)
2422 {
2423         __u8 rtap_hdr[] = {
2424                 0x00, 0x00, /* radiotap version */
2425                 0x0e, 0x00, /* radiotap length */
2426                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2427                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2428                 0x00,       /* padding */
2429                 0x00, 0x00, /* RX and TX flags to indicate that */
2430                 0x00, 0x00, /* this is the injected frame directly */
2431         };
2432         struct iovec iov[2] = {
2433                 {
2434                         .iov_base = &rtap_hdr,
2435                         .iov_len = sizeof(rtap_hdr),
2436                 },
2437                 {
2438                         .iov_base = (void *) data,
2439                         .iov_len = len,
2440                 }
2441         };
2442         struct msghdr msg = {
2443                 .msg_name = NULL,
2444                 .msg_namelen = 0,
2445                 .msg_iov = iov,
2446                 .msg_iovlen = 2,
2447                 .msg_control = NULL,
2448                 .msg_controllen = 0,
2449                 .msg_flags = 0,
2450         };
2451
2452         if (encrypt)
2453                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2454
2455         return sendmsg(drv->monitor_sock, &msg, 0);
2456 }
2457
2458
2459 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2460                                         size_t data_len)
2461 {
2462         struct wpa_driver_nl80211_data *drv = priv;
2463         struct ieee80211_mgmt *mgmt;
2464         int encrypt = 1;
2465         u16 fc;
2466
2467         mgmt = (struct ieee80211_mgmt *) data;
2468         fc = le_to_host16(mgmt->frame_control);
2469
2470         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2471             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2472                 /*
2473                  * Only one of the authentication frame types is encrypted.
2474                  * In order for static WEP encryption to work properly (i.e.,
2475                  * to not encrypt the frame), we need to tell mac80211 about
2476                  * the frames that must not be encrypted.
2477                  */
2478                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2479                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2480                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2481                         encrypt = 0;
2482         }
2483
2484         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2485 }
2486
2487
2488 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2489                                          const u8 *head, size_t head_len,
2490                                          const u8 *tail, size_t tail_len,
2491                                          int dtim_period, int beacon_int)
2492 {
2493         struct wpa_driver_nl80211_data *drv = priv;
2494         struct nl_msg *msg;
2495         u8 cmd = NL80211_CMD_NEW_BEACON;
2496         int ret;
2497         int beacon_set;
2498         int ifindex = if_nametoindex(ifname);
2499 #ifdef HOSTAPD
2500         struct i802_bss *bss;
2501
2502         bss = get_bss(drv, ifindex);
2503         if (bss == NULL)
2504                 return -ENOENT;
2505         beacon_set = bss->beacon_set;
2506 #else /* HOSTAPD */
2507         beacon_set = drv->beacon_set;
2508 #endif /* HOSTAPD */
2509
2510         msg = nlmsg_alloc();
2511         if (!msg)
2512                 return -ENOMEM;
2513
2514         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2515                    beacon_set);
2516         if (beacon_set)
2517                 cmd = NL80211_CMD_SET_BEACON;
2518
2519         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2520                     0, cmd, 0);
2521         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2522         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2523         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2524         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2525         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2526
2527         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2528         if (ret) {
2529                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2530                            ret, strerror(-ret));
2531         } else {
2532 #ifdef HOSTAPD
2533                 bss->beacon_set = 1;
2534 #else /* HOSTAPD */
2535                 drv->beacon_set = 1;
2536 #endif /* HOSTAPD */
2537         }
2538         return ret;
2539  nla_put_failure:
2540         return -ENOBUFS;
2541 }
2542
2543
2544 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2545                                        int freq, int ht_enabled,
2546                                        int sec_channel_offset)
2547 {
2548         struct nl_msg *msg;
2549         int ret;
2550
2551         msg = nlmsg_alloc();
2552         if (!msg)
2553                 return -1;
2554
2555         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2556                     NL80211_CMD_SET_WIPHY, 0);
2557
2558         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2559         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2560         if (ht_enabled) {
2561                 switch (sec_channel_offset) {
2562                 case -1:
2563                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2564                                     NL80211_CHAN_HT40MINUS);
2565                         break;
2566                 case 1:
2567                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2568                                     NL80211_CHAN_HT40PLUS);
2569                         break;
2570                 default:
2571                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2572                                     NL80211_CHAN_HT20);
2573                         break;
2574                 }
2575         }
2576
2577         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2578         if (ret == 0)
2579                 return 0;
2580         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2581                    "%d (%s)", freq, ret, strerror(-ret));
2582 nla_put_failure:
2583         return -1;
2584 }
2585
2586
2587 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2588                                       struct hostapd_sta_add_params *params)
2589 {
2590         struct wpa_driver_nl80211_data *drv = priv;
2591         struct nl_msg *msg;
2592         int ret = -ENOBUFS;
2593
2594         msg = nlmsg_alloc();
2595         if (!msg)
2596                 return -ENOMEM;
2597
2598         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2599                     0, NL80211_CMD_NEW_STATION, 0);
2600
2601         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2602         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2603         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2604         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2605                 params->supp_rates);
2606         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2607                     params->listen_interval);
2608         if (params->ht_capabilities) {
2609                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2610                         sizeof(*params->ht_capabilities),
2611                         params->ht_capabilities);
2612         }
2613
2614         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2615         if (ret)
2616                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2617                            "result: %d (%s)", ret, strerror(-ret));
2618         if (ret == -EEXIST)
2619                 ret = 0;
2620  nla_put_failure:
2621         return ret;
2622 }
2623
2624
2625 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2626 {
2627         struct wpa_driver_nl80211_data *drv = priv;
2628         struct nl_msg *msg;
2629         int ret;
2630
2631         msg = nlmsg_alloc();
2632         if (!msg)
2633                 return -ENOMEM;
2634
2635         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2636                     0, NL80211_CMD_DEL_STATION, 0);
2637
2638         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2639                     if_nametoindex(drv->ifname));
2640         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2641
2642         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2643         if (ret == -ENOENT)
2644                 return 0;
2645         return ret;
2646  nla_put_failure:
2647         return -ENOBUFS;
2648 }
2649
2650
2651 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2652                                  int ifidx)
2653 {
2654         struct nl_msg *msg;
2655
2656 #ifdef HOSTAPD
2657         /* stop listening for EAPOL on this interface */
2658         del_ifidx(drv, ifidx);
2659 #endif /* HOSTAPD */
2660
2661         msg = nlmsg_alloc();
2662         if (!msg)
2663                 goto nla_put_failure;
2664
2665         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2666                     0, NL80211_CMD_DEL_INTERFACE, 0);
2667         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2668
2669         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2670                 return;
2671  nla_put_failure:
2672         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2673                    ifidx);
2674 }
2675
2676
2677 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2678                                      const char *ifname,
2679                                      enum nl80211_iftype iftype,
2680                                      const u8 *addr)
2681 {
2682         struct nl_msg *msg, *flags = NULL;
2683         int ifidx;
2684         int ret = -ENOBUFS;
2685
2686         msg = nlmsg_alloc();
2687         if (!msg)
2688                 return -1;
2689
2690         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2691                     0, NL80211_CMD_NEW_INTERFACE, 0);
2692         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2693         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2694         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2695
2696         if (iftype == NL80211_IFTYPE_MONITOR) {
2697                 int err;
2698
2699                 flags = nlmsg_alloc();
2700                 if (!flags)
2701                         goto nla_put_failure;
2702
2703                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2704
2705                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2706
2707                 nlmsg_free(flags);
2708
2709                 if (err)
2710                         goto nla_put_failure;
2711         }
2712
2713         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2714         if (ret) {
2715  nla_put_failure:
2716                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2717                            ifname, ret, strerror(-ret));
2718                 return ret;
2719         }
2720
2721         ifidx = if_nametoindex(ifname);
2722
2723         if (ifidx <= 0)
2724                 return -1;
2725
2726 #ifdef HOSTAPD
2727         /* start listening for EAPOL on this interface */
2728         add_ifidx(drv, ifidx);
2729
2730         if (addr && iftype == NL80211_IFTYPE_AP &&
2731             set_ifhwaddr(drv, ifname, addr)) {
2732                 nl80211_remove_iface(drv, ifidx);
2733                 return -1;
2734         }
2735 #endif /* HOSTAPD */
2736
2737         return ifidx;
2738 }
2739
2740
2741 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2742                                 const char *ifname, enum nl80211_iftype iftype,
2743                                 const u8 *addr)
2744 {
2745         int ret;
2746
2747         ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2748
2749         /* if error occured and interface exists already */
2750         if (ret == -ENFILE && if_nametoindex(ifname)) {
2751                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2752
2753                 /* Try to remove the interface that was already there. */
2754                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2755
2756                 /* Try to create the interface again */
2757                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2758         }
2759
2760         return ret;
2761 }
2762
2763
2764 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2765 {
2766         struct ieee80211_hdr *hdr;
2767         u16 fc;
2768         union wpa_event_data event;
2769
2770         hdr = (struct ieee80211_hdr *) buf;
2771         fc = le_to_host16(hdr->frame_control);
2772
2773         os_memset(&event, 0, sizeof(event));
2774         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
2775         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
2776         event.tx_status.dst = hdr->addr1;
2777         event.tx_status.data = buf;
2778         event.tx_status.data_len = len;
2779         event.tx_status.ack = ok;
2780         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
2781 }
2782
2783
2784 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2785                              struct ieee80211_hdr *hdr, size_t len)
2786 {
2787         union wpa_event_data event;
2788         os_memset(&event, 0, sizeof(event));
2789         event.rx_from_unknown.hdr = hdr;
2790         event.rx_from_unknown.len = len;
2791         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
2792 }
2793
2794
2795 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2796                          u8 *buf, size_t len,
2797                          struct hostapd_frame_info *hfi)
2798 {
2799         struct ieee80211_hdr *hdr;
2800         u16 fc;
2801         union wpa_event_data event;
2802
2803         hdr = (struct ieee80211_hdr *) buf;
2804         fc = le_to_host16(hdr->frame_control);
2805
2806         switch (WLAN_FC_GET_TYPE(fc)) {
2807         case WLAN_FC_TYPE_MGMT:
2808                 os_memset(&event, 0, sizeof(event));
2809                 event.rx_mgmt.frame = buf;
2810                 event.rx_mgmt.frame_len = len;
2811                 event.rx_mgmt.fi = hfi;
2812                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
2813                 break;
2814         case WLAN_FC_TYPE_CTRL:
2815                 /* can only get here with PS-Poll frames */
2816                 wpa_printf(MSG_DEBUG, "CTRL");
2817                 from_unknown_sta(drv, hdr, len);
2818                 break;
2819         case WLAN_FC_TYPE_DATA:
2820                 from_unknown_sta(drv, hdr, len);
2821                 break;
2822         }
2823 }
2824
2825
2826 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2827 {
2828         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2829         int len;
2830         unsigned char buf[3000];
2831         struct ieee80211_radiotap_iterator iter;
2832         int ret;
2833         struct hostapd_frame_info hfi;
2834         int injected = 0, failed = 0, rxflags = 0;
2835
2836         len = recv(sock, buf, sizeof(buf), 0);
2837         if (len < 0) {
2838                 perror("recv");
2839                 return;
2840         }
2841
2842         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2843                 printf("received invalid radiotap frame\n");
2844                 return;
2845         }
2846
2847         memset(&hfi, 0, sizeof(hfi));
2848
2849         while (1) {
2850                 ret = ieee80211_radiotap_iterator_next(&iter);
2851                 if (ret == -ENOENT)
2852                         break;
2853                 if (ret) {
2854                         printf("received invalid radiotap frame (%d)\n", ret);
2855                         return;
2856                 }
2857                 switch (iter.this_arg_index) {
2858                 case IEEE80211_RADIOTAP_FLAGS:
2859                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2860                                 len -= 4;
2861                         break;
2862                 case IEEE80211_RADIOTAP_RX_FLAGS:
2863                         rxflags = 1;
2864                         break;
2865                 case IEEE80211_RADIOTAP_TX_FLAGS:
2866                         injected = 1;
2867                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2868                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2869                         break;
2870                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2871                         break;
2872                 case IEEE80211_RADIOTAP_CHANNEL:
2873                         /* TODO convert from freq/flags to channel number
2874                         hfi.channel = XXX;
2875                          */
2876                         break;
2877                 case IEEE80211_RADIOTAP_RATE:
2878                         hfi.datarate = *iter.this_arg * 5;
2879                         break;
2880                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2881                         hfi.ssi_signal = *iter.this_arg;
2882                         break;
2883                 }
2884         }
2885
2886         if (rxflags && injected)
2887                 return;
2888
2889         if (!injected)
2890                 handle_frame(drv, buf + iter.max_length,
2891                              len - iter.max_length, &hfi);
2892         else
2893                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2894                                    len - iter.max_length, !failed);
2895 }
2896
2897
2898 /*
2899  * we post-process the filter code later and rewrite
2900  * this to the offset to the last instruction
2901  */
2902 #define PASS    0xFF
2903 #define FAIL    0xFE
2904
2905 static struct sock_filter msock_filter_insns[] = {
2906         /*
2907          * do a little-endian load of the radiotap length field
2908          */
2909         /* load lower byte into A */
2910         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2911         /* put it into X (== index register) */
2912         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2913         /* load upper byte into A */
2914         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2915         /* left-shift it by 8 */
2916         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2917         /* or with X */
2918         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2919         /* put result into X */
2920         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2921
2922         /*
2923          * Allow management frames through, this also gives us those
2924          * management frames that we sent ourselves with status
2925          */
2926         /* load the lower byte of the IEEE 802.11 frame control field */
2927         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2928         /* mask off frame type and version */
2929         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2930         /* accept frame if it's both 0, fall through otherwise */
2931         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2932
2933         /*
2934          * TODO: add a bit to radiotap RX flags that indicates
2935          * that the sending station is not associated, then
2936          * add a filter here that filters on our DA and that flag
2937          * to allow us to deauth frames to that bad station.
2938          *
2939          * Not a regression -- we didn't do it before either.
2940          */
2941
2942 #if 0
2943         /*
2944          * drop non-data frames, WDS frames
2945          */
2946         /* load the lower byte of the frame control field */
2947         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2948         /* mask off QoS bit */
2949         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2950         /* drop non-data frames */
2951         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2952         /* load the upper byte of the frame control field */
2953         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2954         /* mask off toDS/fromDS */
2955         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2956         /* drop WDS frames */
2957         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2958 #endif
2959
2960         /*
2961          * add header length to index
2962          */
2963         /* load the lower byte of the frame control field */
2964         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2965         /* mask off QoS bit */
2966         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2967         /* right shift it by 6 to give 0 or 2 */
2968         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2969         /* add data frame header length */
2970         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2971         /* add index, was start of 802.11 header */
2972         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2973         /* move to index, now start of LL header */
2974         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2975
2976         /*
2977          * Accept empty data frames, we use those for
2978          * polling activity.
2979          */
2980         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2981         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2982
2983         /*
2984          * Accept EAPOL frames
2985          */
2986         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2987         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2988         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2989         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2990
2991         /* keep these last two statements or change the code below */
2992         /* return 0 == "DROP" */
2993         BPF_STMT(BPF_RET | BPF_K, 0),
2994         /* return ~0 == "keep all" */
2995         BPF_STMT(BPF_RET | BPF_K, ~0),
2996 };
2997
2998 static struct sock_fprog msock_filter = {
2999         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3000         .filter = msock_filter_insns,
3001 };
3002
3003
3004 static int add_monitor_filter(int s)
3005 {
3006         int idx;
3007
3008         /* rewrite all PASS/FAIL jump offsets */
3009         for (idx = 0; idx < msock_filter.len; idx++) {
3010                 struct sock_filter *insn = &msock_filter_insns[idx];
3011
3012                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3013                         if (insn->code == (BPF_JMP|BPF_JA)) {
3014                                 if (insn->k == PASS)
3015                                         insn->k = msock_filter.len - idx - 2;
3016                                 else if (insn->k == FAIL)
3017                                         insn->k = msock_filter.len - idx - 3;
3018                         }
3019
3020                         if (insn->jt == PASS)
3021                                 insn->jt = msock_filter.len - idx - 2;
3022                         else if (insn->jt == FAIL)
3023                                 insn->jt = msock_filter.len - idx - 3;
3024
3025                         if (insn->jf == PASS)
3026                                 insn->jf = msock_filter.len - idx - 2;
3027                         else if (insn->jf == FAIL)
3028                                 insn->jf = msock_filter.len - idx - 3;
3029                 }
3030         }
3031
3032         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3033                        &msock_filter, sizeof(msock_filter))) {
3034                 perror("SO_ATTACH_FILTER");
3035                 return -1;
3036         }
3037
3038         return 0;
3039 }
3040
3041
3042 static void nl80211_remove_monitor_interface(
3043         struct wpa_driver_nl80211_data *drv)
3044 {
3045         if (drv->monitor_ifidx >= 0) {
3046                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3047                 drv->monitor_ifidx = -1;
3048         }
3049 }
3050
3051
3052 static int
3053 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3054 {
3055         char buf[IFNAMSIZ];
3056         struct sockaddr_ll ll;
3057         int optval;
3058         socklen_t optlen;
3059
3060         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3061         buf[IFNAMSIZ - 1] = '\0';
3062
3063         drv->monitor_ifidx =
3064                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
3065
3066         if (drv->monitor_ifidx < 0)
3067                 return -1;
3068
3069         if (hostapd_set_iface_flags(drv, buf, 1))
3070                 goto error;
3071
3072         memset(&ll, 0, sizeof(ll));
3073         ll.sll_family = AF_PACKET;
3074         ll.sll_ifindex = drv->monitor_ifidx;
3075         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3076         if (drv->monitor_sock < 0) {
3077                 perror("socket[PF_PACKET,SOCK_RAW]");
3078                 goto error;
3079         }
3080
3081         if (add_monitor_filter(drv->monitor_sock)) {
3082                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3083                            "interface; do filtering in user space");
3084                 /* This works, but will cost in performance. */
3085         }
3086
3087         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3088                 perror("monitor socket bind");
3089                 goto error;
3090         }
3091
3092         optlen = sizeof(optval);
3093         optval = 20;
3094         if (setsockopt
3095             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3096                 perror("Failed to set socket priority");
3097                 goto error;
3098         }
3099
3100         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3101                                      drv, NULL)) {
3102                 printf("Could not register monitor read socket\n");
3103                 goto error;
3104         }
3105
3106         return 0;
3107  error:
3108         nl80211_remove_monitor_interface(drv);
3109         return -1;
3110 }
3111
3112
3113 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3114
3115 static int wpa_driver_nl80211_hapd_send_eapol(
3116         void *priv, const u8 *addr, const u8 *data,
3117         size_t data_len, int encrypt, const u8 *own_addr)
3118 {
3119         struct wpa_driver_nl80211_data *drv = priv;
3120         struct ieee80211_hdr *hdr;
3121         size_t len;
3122         u8 *pos;
3123         int res;
3124 #if 0 /* FIX */
3125         int qos = sta->flags & WPA_STA_WMM;
3126 #else
3127         int qos = 0;
3128 #endif
3129
3130         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3131                 data_len;
3132         hdr = os_zalloc(len);
3133         if (hdr == NULL) {
3134                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3135                        (unsigned long) len);
3136                 return -1;
3137         }
3138
3139         hdr->frame_control =
3140                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3141         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3142         if (encrypt)
3143                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3144 #if 0 /* To be enabled if qos determination is added above */
3145         if (qos) {
3146                 hdr->frame_control |=
3147                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3148         }
3149 #endif
3150
3151         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3152         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3153         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3154         pos = (u8 *) (hdr + 1);
3155
3156 #if 0 /* To be enabled if qos determination is added above */
3157         if (qos) {
3158                 /* add an empty QoS header if needed */
3159                 pos[0] = 0;
3160                 pos[1] = 0;
3161                 pos += 2;
3162         }
3163 #endif
3164
3165         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3166         pos += sizeof(rfc1042_header);
3167         WPA_PUT_BE16(pos, ETH_P_PAE);
3168         pos += 2;
3169         memcpy(pos, data, data_len);
3170
3171         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3172         if (res < 0) {
3173                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3174                            "failed: %d (%s)",
3175                            (unsigned long) len, errno, strerror(errno));
3176         }
3177         free(hdr);
3178
3179         return res;
3180 }
3181
3182
3183 static u32 sta_flags_nl80211(int flags)
3184 {
3185         u32 f = 0;
3186
3187         if (flags & WPA_STA_AUTHORIZED)
3188                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3189         if (flags & WPA_STA_WMM)
3190                 f |= BIT(NL80211_STA_FLAG_WME);
3191         if (flags & WPA_STA_SHORT_PREAMBLE)
3192                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3193         if (flags & WPA_STA_MFP)
3194                 f |= BIT(NL80211_STA_FLAG_MFP);
3195
3196         return f;
3197 }
3198
3199
3200 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3201                                             int total_flags, int flags_or,
3202                                             int flags_and)
3203 {
3204         struct wpa_driver_nl80211_data *drv = priv;
3205         struct nl_msg *msg, *flags = NULL;
3206         struct nl80211_sta_flag_update upd;
3207
3208         msg = nlmsg_alloc();
3209         if (!msg)
3210                 return -ENOMEM;
3211
3212         flags = nlmsg_alloc();
3213         if (!flags) {
3214                 nlmsg_free(msg);
3215                 return -ENOMEM;
3216         }
3217
3218         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3219                     0, NL80211_CMD_SET_STATION, 0);
3220
3221         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3222                     if_nametoindex(drv->ifname));
3223         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3224
3225         /*
3226          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3227          * can be removed eventually.
3228          */
3229         if (total_flags & WPA_STA_AUTHORIZED)
3230                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3231
3232         if (total_flags & WPA_STA_WMM)
3233                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3234
3235         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3236                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3237
3238         if (total_flags & WPA_STA_MFP)
3239                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3240
3241         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3242                 goto nla_put_failure;
3243
3244         os_memset(&upd, 0, sizeof(upd));
3245         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3246         upd.set = sta_flags_nl80211(flags_or);
3247         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3248
3249         nlmsg_free(flags);
3250
3251         return send_and_recv_msgs(drv, msg, NULL, NULL);
3252  nla_put_failure:
3253         nlmsg_free(flags);
3254         return -ENOBUFS;
3255 }
3256
3257
3258 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3259                                  struct wpa_driver_associate_params *params)
3260 {
3261         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3262             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3263                 nl80211_remove_monitor_interface(drv);
3264                 return -1;
3265         }
3266
3267         /* TODO: setup monitor interface (and add code somewhere to remove this
3268          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3269
3270         return 0;
3271 }
3272
3273
3274 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3275 {
3276         struct nl_msg *msg;
3277         int ret = -1;
3278
3279         msg = nlmsg_alloc();
3280         if (!msg)
3281                 return -1;
3282
3283         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3284                     NL80211_CMD_LEAVE_IBSS, 0);
3285         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3286         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3287         msg = NULL;
3288         if (ret) {
3289                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3290                            "(%s)", ret, strerror(-ret));
3291                 goto nla_put_failure;
3292         }
3293
3294         ret = 0;
3295         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3296
3297 nla_put_failure:
3298         nlmsg_free(msg);
3299         return ret;
3300 }
3301
3302
3303 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3304                                    struct wpa_driver_associate_params *params)
3305 {
3306         struct nl_msg *msg;
3307         int ret = -1;
3308         int count = 0;
3309
3310         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3311
3312         if (wpa_driver_nl80211_set_mode(drv, params->mode)) {
3313                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3314                            "IBSS mode");
3315                 return -1;
3316         }
3317
3318 retry:
3319         msg = nlmsg_alloc();
3320         if (!msg)
3321                 return -1;
3322
3323         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3324                     NL80211_CMD_JOIN_IBSS, 0);
3325         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3326
3327         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3328                 goto nla_put_failure;
3329
3330         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3331                           params->ssid, params->ssid_len);
3332         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3333                 params->ssid);
3334         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3335         drv->ssid_len = params->ssid_len;
3336
3337         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3338         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3339
3340         ret = nl80211_set_conn_keys(params, msg);
3341         if (ret)
3342                 goto nla_put_failure;
3343
3344         if (params->wpa_ie) {
3345                 wpa_hexdump(MSG_DEBUG,
3346                             "  * Extra IEs for Beacon/Probe Response frames",
3347                             params->wpa_ie, params->wpa_ie_len);
3348                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3349                         params->wpa_ie);
3350         }
3351
3352         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3353         msg = NULL;
3354         if (ret) {
3355                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3356                            ret, strerror(-ret));
3357                 count++;
3358                 if (ret == -EALREADY && count == 1) {
3359                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3360                                    "forced leave");
3361                         nl80211_leave_ibss(drv);
3362                         nlmsg_free(msg);
3363                         goto retry;
3364                 }
3365
3366                 goto nla_put_failure;
3367         }
3368         ret = 0;
3369         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3370
3371 nla_put_failure:
3372         nlmsg_free(msg);
3373         return ret;
3374 }
3375
3376
3377 static int wpa_driver_nl80211_connect(
3378         struct wpa_driver_nl80211_data *drv,
3379         struct wpa_driver_associate_params *params)
3380 {
3381         struct nl_msg *msg;
3382         enum nl80211_auth_type type;
3383         int ret = 0;
3384
3385         msg = nlmsg_alloc();
3386         if (!msg)
3387                 return -1;
3388
3389         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3390         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3391                     NL80211_CMD_CONNECT, 0);
3392
3393         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3394         if (params->bssid) {
3395                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3396                            MAC2STR(params->bssid));
3397                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3398         }
3399         if (params->freq) {
3400                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3401                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3402         }
3403         if (params->ssid) {
3404                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3405                                   params->ssid, params->ssid_len);
3406                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3407                         params->ssid);
3408                 if (params->ssid_len > sizeof(drv->ssid))
3409                         goto nla_put_failure;
3410                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3411                 drv->ssid_len = params->ssid_len;
3412         }
3413         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3414         if (params->wpa_ie)
3415                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3416                         params->wpa_ie);
3417
3418         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3419                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3420         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3421                 type = NL80211_AUTHTYPE_SHARED_KEY;
3422         else if (params->auth_alg & AUTH_ALG_LEAP)
3423                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3424         else if (params->auth_alg & AUTH_ALG_FT)
3425                 type = NL80211_AUTHTYPE_FT;
3426         else
3427                 goto nla_put_failure;
3428
3429         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3430         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3431
3432         if (params->wpa_ie && params->wpa_ie_len) {
3433                 enum nl80211_wpa_versions ver;
3434
3435                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3436                         ver = NL80211_WPA_VERSION_2;
3437                 else
3438                         ver = NL80211_WPA_VERSION_1;
3439
3440                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3441                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3442         }
3443
3444         if (params->pairwise_suite != CIPHER_NONE) {
3445                 int cipher;
3446
3447                 switch (params->pairwise_suite) {
3448                 case CIPHER_WEP40:
3449                         cipher = WLAN_CIPHER_SUITE_WEP40;
3450                         break;
3451                 case CIPHER_WEP104:
3452                         cipher = WLAN_CIPHER_SUITE_WEP104;
3453                         break;
3454                 case CIPHER_CCMP:
3455                         cipher = WLAN_CIPHER_SUITE_CCMP;
3456                         break;
3457                 case CIPHER_TKIP:
3458                 default:
3459                         cipher = WLAN_CIPHER_SUITE_TKIP;
3460                         break;
3461                 }
3462                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3463         }
3464
3465         if (params->group_suite != CIPHER_NONE) {
3466                 int cipher;
3467
3468                 switch (params->group_suite) {
3469                 case CIPHER_WEP40:
3470                         cipher = WLAN_CIPHER_SUITE_WEP40;
3471                         break;
3472                 case CIPHER_WEP104:
3473                         cipher = WLAN_CIPHER_SUITE_WEP104;
3474                         break;
3475                 case CIPHER_CCMP:
3476                         cipher = WLAN_CIPHER_SUITE_CCMP;
3477                         break;
3478                 case CIPHER_TKIP:
3479                 default:
3480                         cipher = WLAN_CIPHER_SUITE_TKIP;
3481                         break;
3482                 }
3483                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3484         }
3485
3486         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3487             params->key_mgmt_suite == KEY_MGMT_PSK) {
3488                 int mgmt = WLAN_AKM_SUITE_PSK;
3489
3490                 switch (params->key_mgmt_suite) {
3491                 case KEY_MGMT_802_1X:
3492                         mgmt = WLAN_AKM_SUITE_8021X;
3493                         break;
3494                 case KEY_MGMT_PSK:
3495                 default:
3496                         mgmt = WLAN_AKM_SUITE_PSK;
3497                         break;
3498                 }
3499                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3500         }
3501
3502         ret = nl80211_set_conn_keys(params, msg);
3503         if (ret)
3504                 goto nla_put_failure;
3505
3506         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3507         msg = NULL;
3508         if (ret) {
3509                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3510                            "(%s)", ret, strerror(-ret));
3511                 goto nla_put_failure;
3512         }
3513         ret = 0;
3514         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3515
3516 nla_put_failure:
3517         nlmsg_free(msg);
3518         return ret;
3519
3520 }
3521
3522
3523 static int wpa_driver_nl80211_associate(
3524         void *priv, struct wpa_driver_associate_params *params)
3525 {
3526         struct wpa_driver_nl80211_data *drv = priv;
3527         int ret = -1;
3528         struct nl_msg *msg;
3529
3530         if (params->mode == IEEE80211_MODE_AP)
3531                 return wpa_driver_nl80211_ap(drv, params);
3532
3533         if (params->mode == IEEE80211_MODE_IBSS)
3534                 return wpa_driver_nl80211_ibss(drv, params);
3535
3536         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3537                 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3538                         return -1;
3539                 return wpa_driver_nl80211_connect(drv, params);
3540         }
3541
3542         drv->associated = 0;
3543
3544         msg = nlmsg_alloc();
3545         if (!msg)
3546                 return -1;
3547
3548         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3549                    drv->ifindex);
3550         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3551                     NL80211_CMD_ASSOCIATE, 0);
3552
3553         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3554         if (params->bssid) {
3555                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3556                            MAC2STR(params->bssid));
3557                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3558         }
3559         if (params->freq) {
3560                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3561                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3562         }
3563         if (params->ssid) {
3564                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3565                                   params->ssid, params->ssid_len);
3566                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3567                         params->ssid);
3568                 if (params->ssid_len > sizeof(drv->ssid))
3569                         goto nla_put_failure;
3570                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3571                 drv->ssid_len = params->ssid_len;
3572         }
3573         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3574         if (params->wpa_ie)
3575                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3576                         params->wpa_ie);
3577
3578 #ifdef CONFIG_IEEE80211W
3579         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3580                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3581 #endif /* CONFIG_IEEE80211W */
3582
3583         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3584
3585         if (params->prev_bssid) {
3586                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3587                            MAC2STR(params->prev_bssid));
3588                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3589                         params->prev_bssid);
3590         }
3591
3592         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3593         msg = NULL;
3594         if (ret) {
3595                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3596                            "(%s)", ret, strerror(-ret));
3597                 goto nla_put_failure;
3598         }
3599         ret = 0;
3600         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3601                    "successfully");
3602
3603 nla_put_failure:
3604         nlmsg_free(msg);
3605         return ret;
3606 }
3607
3608
3609 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3610                             int ifindex, int mode)
3611 {
3612         struct nl_msg *msg;
3613         int ret = -ENOBUFS;
3614
3615         msg = nlmsg_alloc();
3616         if (!msg)
3617                 return -ENOMEM;
3618
3619         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3620                     0, NL80211_CMD_SET_INTERFACE, 0);
3621         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3622         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3623
3624         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3625         if (!ret)
3626                 return 0;
3627 nla_put_failure:
3628         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3629                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3630         return ret;
3631 }
3632
3633
3634 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3635 {
3636         struct wpa_driver_nl80211_data *drv = priv;
3637         int ret = -1;
3638         int nlmode;
3639
3640         switch (mode) {
3641         case 0:
3642                 nlmode = NL80211_IFTYPE_STATION;
3643                 break;
3644         case 1:
3645                 nlmode = NL80211_IFTYPE_ADHOC;
3646                 break;
3647         case 2:
3648                 nlmode = NL80211_IFTYPE_AP;
3649                 break;
3650         default:
3651                 return -1;
3652         }
3653
3654         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3655                 drv->nlmode = nlmode;
3656                 ret = 0;
3657                 goto done;
3658         }
3659
3660         if (nlmode == drv->nlmode) {
3661                 ret = 0;
3662                 goto done; /* Already in the requested mode */
3663         }
3664
3665         /* mac80211 doesn't allow mode changes while the device is up, so
3666          * take the device down, try to set the mode again, and bring the
3667          * device back up.
3668          */
3669         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3670                 /* Try to set the mode again while the interface is down */
3671                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3672                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3673                         ret = -1;
3674         }
3675
3676         if (!ret)
3677                 drv->nlmode = nlmode;
3678
3679 done:
3680         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3681                 /* Setup additional AP mode functionality if needed */
3682                 if (drv->monitor_ifidx < 0 &&
3683                     nl80211_create_monitor_interface(drv))
3684                         return -1;
3685         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3686                 /* Remove additional AP mode functionality */
3687                 nl80211_remove_monitor_interface(drv);
3688         }
3689
3690         return ret;
3691 }
3692
3693
3694 static int wpa_driver_nl80211_get_capa(void *priv,
3695                                        struct wpa_driver_capa *capa)
3696 {
3697         struct wpa_driver_nl80211_data *drv = priv;
3698         if (!drv->has_capability)
3699                 return -1;
3700         os_memcpy(capa, &drv->capa, sizeof(*capa));
3701         return 0;
3702 }
3703
3704
3705 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3706 {
3707         struct wpa_driver_nl80211_data *drv = priv;
3708
3709         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3710                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3711         drv->operstate = state;
3712         return netlink_send_oper_ifla(drv->link_event_sock, drv->ifindex,
3713                                       -1,
3714                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
3715 }
3716
3717
3718 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3719 {
3720         struct wpa_driver_nl80211_data *drv = priv;
3721         struct nl_msg *msg;
3722         struct nl80211_sta_flag_update upd;
3723
3724         msg = nlmsg_alloc();
3725         if (!msg)
3726                 return -ENOMEM;
3727
3728         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3729                     0, NL80211_CMD_SET_STATION, 0);
3730
3731         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3732                     if_nametoindex(drv->ifname));
3733         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3734
3735         os_memset(&upd, 0, sizeof(upd));
3736         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3737         if (authorized)
3738                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3739         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3740
3741         return send_and_recv_msgs(drv, msg, NULL, NULL);
3742  nla_put_failure:
3743         return -ENOBUFS;
3744 }
3745
3746
3747 #ifdef HOSTAPD
3748
3749 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3750                                  int ifindex)
3751 {
3752         struct i802_bss *bss = &drv->bss;
3753         while (bss) {
3754                 if (ifindex == bss->ifindex)
3755                         return bss;
3756                 bss = bss->next;
3757         }
3758         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3759         return NULL;
3760 }
3761
3762
3763 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3764 {
3765         int i;
3766         int *old;
3767
3768         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3769                    ifidx);
3770         for (i = 0; i < drv->num_if_indices; i++) {
3771                 if (drv->if_indices[i] == 0) {
3772                         drv->if_indices[i] = ifidx;
3773                         return;
3774                 }
3775         }
3776
3777         if (drv->if_indices != drv->default_if_indices)
3778                 old = drv->if_indices;
3779         else
3780                 old = NULL;
3781
3782         drv->if_indices = realloc(old,
3783                                   sizeof(int) * (drv->num_if_indices + 1));
3784         if (!drv->if_indices) {
3785                 if (!old)
3786                         drv->if_indices = drv->default_if_indices;
3787                 else
3788                         drv->if_indices = old;
3789                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3790                            "interfaces");
3791                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3792                 return;
3793         }
3794         drv->if_indices[drv->num_if_indices] = ifidx;
3795         drv->num_if_indices++;
3796 }
3797
3798
3799 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3800 {
3801         int i;
3802
3803         for (i = 0; i < drv->num_if_indices; i++) {
3804                 if (drv->if_indices[i] == ifidx) {
3805                         drv->if_indices[i] = 0;
3806                         break;
3807                 }
3808         }
3809 }
3810
3811
3812 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3813 {
3814         int i;
3815
3816         for (i = 0; i < drv->num_if_indices; i++)
3817                 if (drv->if_indices[i] == ifidx)
3818                         return 1;
3819
3820         return 0;
3821 }
3822
3823
3824 static inline int min_int(int a, int b)
3825 {
3826         if (a < b)
3827                 return a;
3828         return b;
3829 }
3830
3831
3832 static int get_key_handler(struct nl_msg *msg, void *arg)
3833 {
3834         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3835         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3836
3837         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3838                   genlmsg_attrlen(gnlh, 0), NULL);
3839
3840         /*
3841          * TODO: validate the key index and mac address!
3842          * Otherwise, there's a race condition as soon as
3843          * the kernel starts sending key notifications.
3844          */
3845
3846         if (tb[NL80211_ATTR_KEY_SEQ])
3847                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3848                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3849         return NL_SKIP;
3850 }
3851
3852
3853 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3854                            int idx, u8 *seq)
3855 {
3856         struct wpa_driver_nl80211_data *drv = priv;
3857         struct nl_msg *msg;
3858
3859         msg = nlmsg_alloc();
3860         if (!msg)
3861                 return -ENOMEM;
3862
3863         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3864                     0, NL80211_CMD_GET_KEY, 0);
3865
3866         if (addr)
3867                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3868         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3869         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3870
3871         memset(seq, 0, 6);
3872
3873         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3874  nla_put_failure:
3875         return -ENOBUFS;
3876 }
3877
3878
3879 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3880                               int mode)
3881 {
3882         struct wpa_driver_nl80211_data *drv = priv;
3883         struct nl_msg *msg;
3884         u8 rates[NL80211_MAX_SUPP_RATES];
3885         u8 rates_len = 0;
3886         int i;
3887
3888         msg = nlmsg_alloc();
3889         if (!msg)
3890                 return -ENOMEM;
3891
3892         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3893                     NL80211_CMD_SET_BSS, 0);
3894
3895         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3896                 rates[rates_len++] = basic_rates[i] / 5;
3897
3898         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3899
3900         /* TODO: multi-BSS support */
3901         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3902
3903         return send_and_recv_msgs(drv, msg, NULL, NULL);
3904  nla_put_failure:
3905         return -ENOBUFS;
3906 }
3907
3908
3909 /* Set kernel driver on given frequency (MHz) */
3910 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3911 {
3912         struct wpa_driver_nl80211_data *drv = priv;
3913         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3914                                            freq->sec_channel_offset);
3915 }
3916
3917
3918 static int i802_set_rts(void *priv, int rts)
3919 {
3920         struct wpa_driver_nl80211_data *drv = priv;
3921         struct nl_msg *msg;
3922         int ret = -ENOBUFS;
3923         u32 val;
3924
3925         msg = nlmsg_alloc();
3926         if (!msg)
3927                 return -ENOMEM;
3928
3929         if (rts >= 2347)
3930                 val = (u32) -1;
3931         else
3932                 val = rts;
3933
3934         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3935                     0, NL80211_CMD_SET_WIPHY, 0);
3936         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3937         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3938
3939         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3940         if (!ret)
3941                 return 0;
3942 nla_put_failure:
3943         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3944                    "%d (%s)", rts, ret, strerror(-ret));
3945         return ret;
3946 }
3947
3948
3949 static int i802_set_frag(void *priv, int frag)
3950 {
3951         struct wpa_driver_nl80211_data *drv = priv;
3952         struct nl_msg *msg;
3953         int ret = -ENOBUFS;
3954         u32 val;
3955
3956         msg = nlmsg_alloc();
3957         if (!msg)
3958                 return -ENOMEM;
3959
3960         if (frag >= 2346)
3961                 val = (u32) -1;
3962         else
3963                 val = frag;
3964
3965         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3966                     0, NL80211_CMD_SET_WIPHY, 0);
3967         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3968         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3969
3970         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3971         if (!ret)
3972                 return 0;
3973 nla_put_failure:
3974         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3975                    "%d: %d (%s)", frag, ret, strerror(-ret));
3976         return ret;
3977 }
3978
3979
3980 static int i802_flush(void *priv)
3981 {
3982         struct wpa_driver_nl80211_data *drv = priv;
3983         struct nl_msg *msg;
3984
3985         msg = nlmsg_alloc();
3986         if (!msg)
3987                 return -1;
3988
3989         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3990                     0, NL80211_CMD_DEL_STATION, 0);
3991
3992         /*
3993          * XXX: FIX! this needs to flush all VLANs too
3994          */
3995         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3996                     if_nametoindex(drv->ifname));
3997
3998         return send_and_recv_msgs(drv, msg, NULL, NULL);
3999  nla_put_failure:
4000         return -ENOBUFS;
4001 }
4002
4003
4004 static int get_sta_handler(struct nl_msg *msg, void *arg)
4005 {
4006         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4007         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4008         struct hostap_sta_driver_data *data = arg;
4009         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4010         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4011                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4012                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4013                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4014                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4015                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4016         };
4017
4018         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4019                   genlmsg_attrlen(gnlh, 0), NULL);
4020
4021         /*
4022          * TODO: validate the interface and mac address!
4023          * Otherwise, there's a race condition as soon as
4024          * the kernel starts sending station notifications.
4025          */
4026
4027         if (!tb[NL80211_ATTR_STA_INFO]) {
4028                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4029                 return NL_SKIP;
4030         }
4031         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4032                              tb[NL80211_ATTR_STA_INFO],
4033                              stats_policy)) {
4034                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4035                 return NL_SKIP;
4036         }
4037
4038         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4039                 data->inactive_msec =
4040                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4041         if (stats[NL80211_STA_INFO_RX_BYTES])
4042                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4043         if (stats[NL80211_STA_INFO_TX_BYTES])
4044                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4045         if (stats[NL80211_STA_INFO_RX_PACKETS])
4046                 data->rx_packets =
4047                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4048         if (stats[NL80211_STA_INFO_TX_PACKETS])
4049                 data->tx_packets =
4050                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4051
4052         return NL_SKIP;
4053 }
4054
4055 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4056                               const u8 *addr)
4057 {
4058         struct wpa_driver_nl80211_data *drv = priv;
4059         struct nl_msg *msg;
4060
4061         os_memset(data, 0, sizeof(*data));
4062         msg = nlmsg_alloc();
4063         if (!msg)
4064                 return -ENOMEM;
4065
4066         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4067                     0, NL80211_CMD_GET_STATION, 0);
4068
4069         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4070         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4071
4072         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4073  nla_put_failure:
4074         return -ENOBUFS;
4075 }
4076
4077
4078 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4079                                     int cw_min, int cw_max, int burst_time)
4080 {
4081         struct wpa_driver_nl80211_data *drv = priv;
4082         struct nl_msg *msg;
4083         struct nlattr *txq, *params;
4084
4085         msg = nlmsg_alloc();
4086         if (!msg)
4087                 return -1;
4088
4089         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4090                     0, NL80211_CMD_SET_WIPHY, 0);
4091
4092         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4093
4094         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4095         if (!txq)
4096                 goto nla_put_failure;
4097
4098         /* We are only sending parameters for a single TXQ at a time */
4099         params = nla_nest_start(msg, 1);
4100         if (!params)
4101                 goto nla_put_failure;
4102
4103         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4104         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4105          * 32 usec, so need to convert the value here. */
4106         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4107         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4108         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4109         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4110
4111         nla_nest_end(msg, params);
4112
4113         nla_nest_end(msg, txq);
4114
4115         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4116                 return 0;
4117  nla_put_failure:
4118         return -1;
4119 }
4120
4121
4122 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4123 {
4124         struct wpa_driver_nl80211_data *drv = priv;
4125         struct nl_msg *msg;
4126
4127         msg = nlmsg_alloc();
4128         if (!msg)
4129                 return -ENOMEM;
4130
4131         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4132                     NL80211_CMD_SET_BSS, 0);
4133
4134         if (cts >= 0)
4135                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4136         if (preamble >= 0)
4137                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4138         if (slot >= 0)
4139                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4140
4141         /* TODO: multi-BSS support */
4142         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4143
4144         return send_and_recv_msgs(drv, msg, NULL, NULL);
4145  nla_put_failure:
4146         return -ENOBUFS;
4147 }
4148
4149
4150 static int i802_set_cts_protect(void *priv, int value)
4151 {
4152         return i802_set_bss(priv, value, -1, -1);
4153 }
4154
4155
4156 static int i802_set_preamble(void *priv, int value)
4157 {
4158         return i802_set_bss(priv, -1, value, -1);
4159 }
4160
4161
4162 static int i802_set_short_slot_time(void *priv, int value)
4163 {
4164         return i802_set_bss(priv, -1, -1, value);
4165 }
4166
4167
4168 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4169                              const char *ifname, int vlan_id)
4170 {
4171         struct wpa_driver_nl80211_data *drv = priv;
4172         struct nl_msg *msg;
4173
4174         msg = nlmsg_alloc();
4175         if (!msg)
4176                 return -ENOMEM;
4177
4178         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4179                     0, NL80211_CMD_SET_STATION, 0);
4180
4181         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4182                     if_nametoindex(drv->ifname));
4183         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4184         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4185                     if_nametoindex(ifname));
4186
4187         return send_and_recv_msgs(drv, msg, NULL, NULL);
4188  nla_put_failure:
4189         return -ENOBUFS;
4190 }
4191
4192
4193 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4194 {
4195         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4196         struct sockaddr_ll lladdr;
4197         unsigned char buf[3000];
4198         int len;
4199         socklen_t fromlen = sizeof(lladdr);
4200
4201         len = recvfrom(sock, buf, sizeof(buf), 0,
4202                        (struct sockaddr *)&lladdr, &fromlen);
4203         if (len < 0) {
4204                 perror("recv");
4205                 return;
4206         }
4207
4208         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4209                 void *ctx;
4210                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4211                 if (!ctx)
4212                         return;
4213                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4214         }
4215 }
4216
4217
4218 static int i802_get_inact_sec(void *priv, const u8 *addr)
4219 {
4220         struct hostap_sta_driver_data data;
4221         int ret;
4222
4223         data.inactive_msec = (unsigned long) -1;
4224         ret = i802_read_sta_data(priv, &data, addr);
4225         if (ret || data.inactive_msec == (unsigned long) -1)
4226                 return -1;
4227         return data.inactive_msec / 1000;
4228 }
4229
4230
4231 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4232 {
4233 #if 0
4234         /* TODO */
4235 #endif
4236         return 0;
4237 }
4238
4239
4240 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4241                            int reason)
4242 {
4243         struct wpa_driver_nl80211_data *drv = priv;
4244         struct ieee80211_mgmt mgmt;
4245
4246         memset(&mgmt, 0, sizeof(mgmt));
4247         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4248                                           WLAN_FC_STYPE_DEAUTH);
4249         memcpy(mgmt.da, addr, ETH_ALEN);
4250         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4251         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4252         mgmt.u.deauth.reason_code = host_to_le16(reason);
4253         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4254                                             IEEE80211_HDRLEN +
4255                                             sizeof(mgmt.u.deauth));
4256 }
4257
4258
4259 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4260                              int reason)
4261 {
4262         struct wpa_driver_nl80211_data *drv = priv;
4263         struct ieee80211_mgmt mgmt;
4264
4265         memset(&mgmt, 0, sizeof(mgmt));
4266         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4267                                           WLAN_FC_STYPE_DISASSOC);
4268         memcpy(mgmt.da, addr, ETH_ALEN);
4269         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4270         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4271         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4272         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4273                                             IEEE80211_HDRLEN +
4274                                             sizeof(mgmt.u.disassoc));
4275 }
4276
4277
4278 static void *i802_init(struct hostapd_data *hapd,
4279                        struct wpa_init_params *params)
4280 {
4281         struct wpa_driver_nl80211_data *drv;
4282         size_t i;
4283
4284         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4285         if (drv == NULL)
4286                 return NULL;
4287
4288         drv->bss.ifindex = drv->ifindex;
4289
4290         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4291         drv->if_indices = drv->default_if_indices;
4292         for (i = 0; i < params->num_bridge; i++) {
4293                 if (params->bridge[i])
4294                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4295         }
4296
4297         /* start listening for EAPOL on the default AP interface */
4298         add_ifidx(drv, drv->ifindex);
4299
4300         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4301                 goto failed;
4302
4303         if (params->bssid) {
4304                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4305                         goto failed;
4306         }
4307
4308         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
4309                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4310                            "into AP mode", drv->ifname);
4311                 goto failed;
4312         }
4313
4314         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4315                 goto failed;
4316
4317         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4318         if (drv->eapol_sock < 0) {
4319                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4320                 goto failed;
4321         }
4322
4323         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4324         {
4325                 printf("Could not register read socket for eapol\n");
4326                 goto failed;
4327         }
4328
4329         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4330                 goto failed;
4331
4332         return drv;
4333
4334 failed:
4335         nl80211_remove_monitor_interface(drv);
4336         if (drv->ioctl_sock >= 0)
4337                 close(drv->ioctl_sock);
4338
4339         genl_family_put(drv->nl80211);
4340         nl_cache_free(drv->nl_cache);
4341         nl_handle_destroy(drv->nl_handle);
4342         nl_cb_put(drv->nl_cb);
4343
4344         os_free(drv);
4345         return NULL;
4346 }
4347
4348
4349 static void i802_deinit(void *priv)
4350 {
4351         wpa_driver_nl80211_deinit(priv);
4352 }
4353
4354 #endif /* HOSTAPD */
4355
4356
4357 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4358         enum wpa_driver_if_type type)
4359 {
4360         switch (type) {
4361         case WPA_IF_STATION:
4362                 return NL80211_IFTYPE_STATION;
4363         case WPA_IF_AP_VLAN:
4364                 return NL80211_IFTYPE_AP_VLAN;
4365         case WPA_IF_AP_BSS:
4366                 return NL80211_IFTYPE_AP;
4367         }
4368         return -1;
4369 }
4370
4371
4372 static int wpa_driver_nl80211_if_add(const char *iface, void *priv,
4373                                      enum wpa_driver_if_type type,
4374                                      const char *ifname, const u8 *addr,
4375                                      void *bss_ctx)
4376 {
4377         struct wpa_driver_nl80211_data *drv = priv;
4378         int ifidx;
4379 #ifdef HOSTAPD
4380         struct i802_bss *bss = NULL;
4381
4382         if (type == WPA_IF_AP_BSS) {
4383                 bss = os_zalloc(sizeof(*bss));
4384                 if (bss == NULL)
4385                         return -1;
4386         }
4387 #endif /* HOSTAPD */
4388
4389         ifidx = nl80211_create_iface(drv, ifname,
4390                                      wpa_driver_nl80211_if_type(type), addr);
4391         if (ifidx < 0) {
4392 #ifdef HOSTAPD
4393                 os_free(bss);
4394 #endif /* HOSTAPD */
4395                 return -1;
4396         }
4397
4398 #ifdef HOSTAPD
4399         if (type == WPA_IF_AP_BSS) {
4400                 if (hostapd_set_iface_flags(priv, ifname, 1)) {
4401                         nl80211_remove_iface(priv, ifidx);
4402                         os_free(bss);
4403                         return -1;
4404                 }
4405                 bss->ifindex = ifidx;
4406                 bss->next = drv->bss.next;
4407                 drv->bss.next = bss;
4408         }
4409 #endif /* HOSTAPD */
4410
4411         return 0;
4412 }
4413
4414
4415 static int wpa_driver_nl80211_if_remove(void *priv,
4416                                         enum wpa_driver_if_type type,
4417                                         const char *ifname)
4418 {
4419         struct wpa_driver_nl80211_data *drv = priv;
4420         int ifindex = if_nametoindex(ifname);
4421
4422         nl80211_remove_iface(drv, ifindex);
4423
4424 #ifdef HOSTAPD
4425         if (type == WPA_IF_AP_BSS) {
4426                 struct i802_bss *bss, *prev;
4427                 prev = &drv->bss;
4428                 bss = drv->bss.next;
4429                 while (bss) {
4430                         if (ifindex == bss->ifindex) {
4431                                 prev->next = bss->next;
4432                                 os_free(bss);
4433                                 break;
4434                         }
4435                         prev = bss;
4436                         bss = bss->next;
4437                 }
4438         }
4439 #endif /* HOSTAPD */
4440
4441         return 0;
4442 }
4443
4444
4445 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4446         .name = "nl80211",
4447         .desc = "Linux nl80211/cfg80211",
4448         .get_bssid = wpa_driver_nl80211_get_bssid,
4449         .get_ssid = wpa_driver_nl80211_get_ssid,
4450         .set_key = wpa_driver_nl80211_set_key,
4451         .scan2 = wpa_driver_nl80211_scan,
4452         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4453         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4454         .disassociate = wpa_driver_nl80211_disassociate,
4455         .authenticate = wpa_driver_nl80211_authenticate,
4456         .associate = wpa_driver_nl80211_associate,
4457         .init = wpa_driver_nl80211_init,
4458         .deinit = wpa_driver_nl80211_deinit,
4459         .get_capa = wpa_driver_nl80211_get_capa,
4460         .set_operstate = wpa_driver_nl80211_set_operstate,
4461         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4462         .set_country = wpa_driver_nl80211_set_country,
4463         .set_beacon = wpa_driver_nl80211_set_beacon,
4464         .if_add = wpa_driver_nl80211_if_add,
4465         .if_remove = wpa_driver_nl80211_if_remove,
4466         .send_mlme = wpa_driver_nl80211_send_mlme,
4467         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4468         .sta_add = wpa_driver_nl80211_sta_add,
4469         .sta_remove = wpa_driver_nl80211_sta_remove,
4470         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4471         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4472 #ifdef HOSTAPD
4473         .hapd_init = i802_init,
4474         .hapd_deinit = i802_deinit,
4475         .get_seqnum = i802_get_seqnum,
4476         .flush = i802_flush,
4477         .read_sta_data = i802_read_sta_data,
4478         .sta_deauth = i802_sta_deauth,
4479         .sta_disassoc = i802_sta_disassoc,
4480         .get_inact_sec = i802_get_inact_sec,
4481         .sta_clear_stats = i802_sta_clear_stats,
4482         .set_freq = i802_set_freq,
4483         .set_rts = i802_set_rts,
4484         .set_frag = i802_set_frag,
4485         .set_rate_sets = i802_set_rate_sets,
4486         .set_cts_protect = i802_set_cts_protect,
4487         .set_preamble = i802_set_preamble,
4488         .set_short_slot_time = i802_set_short_slot_time,
4489         .set_tx_queue_params = i802_set_tx_queue_params,
4490         .set_sta_vlan = i802_set_sta_vlan,
4491 #endif /* HOSTAPD */
4492 };