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

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if_arp.h>
  22 #include <netlink/genl/genl.h>
  23 #include <netlink/genl/family.h>
  24 #include <netlink/genl/ctrl.h>
  25 #include "nl80211_copy.h"
  26 #include "wireless_copy.h"
  27
  28 #include "common.h"
  29 #include "driver.h"
  30 #include "eloop.h"
  31 #include "ieee802_11_defs.h"
  32
  33 #if defined(CONFIG_AP) || defined(HOSTAPD)
  34 #include <netpacket/packet.h>
  35 #include <linux/filter.h>
  36 #include "radiotap.h"
  37 #include "radiotap_iter.h"
  38 #endif /* CONFIG_AP || HOSTAPD */
  39
  40 #ifdef CONFIG_AP
  41
  42 #include "../hostapd/hostapd_defs.h"
  43
  44 #ifndef ETH_P_ALL
  45 #define ETH_P_ALL 0x0003
  46 #endif
  47
  48 #endif /* CONFIG_AP */
  49
  50 #ifdef HOSTAPD
  51 #include <netlink/msg.h>
  52 #include <netlink/attr.h>
  53 #include <net/if.h>
  54 #include <net/if_arp.h>
  55
  56 #include "../../hostapd/hostapd.h"
  57 #include "../../hostapd/config.h"
  58 #include "../../hostapd/sta_flags.h"
  59 #include "ieee802_11_common.h"
  60
  61 #ifdef CONFIG_LIBNL20
  62 /* libnl 2.0 compatibility code */
  63 #define nl_handle_alloc_cb nl_socket_alloc_cb
  64 #define nl_handle_destroy nl_socket_free
  65 #endif /* CONFIG_LIBNL20 */
  66
  67 #endif /* HOSTAPD */
  68
  69
  70 #ifndef IFF_LOWER_UP
  71 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  72 #endif
  73 #ifndef IFF_DORMANT
  74 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  75 #endif
  76
  77 #ifndef IF_OPER_DORMANT
  78 #define IF_OPER_DORMANT 5
  79 #endif
  80 #ifndef IF_OPER_UP
  81 #define IF_OPER_UP 6
  82 #endif
  83
  84 enum ieee80211_msg_type {
  85         ieee80211_msg_normal = 0,
  86         ieee80211_msg_tx_callback_ack = 1,
  87         ieee80211_msg_tx_callback_fail = 2,
  88 };
  89
  90 struct i802_bss {
  91         struct i802_bss *next;
  92         char ifname[IFNAMSIZ + 1];
  93         unsigned int beacon_set:1;
  94 };
  95
  96 struct wpa_driver_nl80211_data {
  97         void *ctx;
  98         int link_event_sock;
  99         int ioctl_sock; /* socket for ioctl() use */
 100         char ifname[IFNAMSIZ + 1];
 101         int ifindex;
 102         int if_removed;
 103         struct wpa_driver_capa capa;
 104         int has_capability;
 105
 106         int operstate;
 107
 108         int scan_complete_events;
 109
 110         struct nl_handle *nl_handle;
 111         struct nl_cache *nl_cache;
 112         struct nl_cb *nl_cb;
 113         struct genl_family *nl80211;
 114
 115         u8 bssid[ETH_ALEN];
 116         int associated;
 117         u8 ssid[32];
 118         size_t ssid_len;
 119
 120 #ifdef CONFIG_AP
 121         int beacon_int;
 122         unsigned int beacon_set:1;
 123         int monitor_sock;
 124         int monitor_ifidx;
 125 #endif /* CONFIG_AP */
 126
 127 #ifdef HOSTAPD
 128         struct hostapd_data *hapd;
 129
 130         int eapol_sock; /* socket for EAPOL frames */
 131         int monitor_sock; /* socket for monitor */
 132         int monitor_ifidx;
 133
 134         int default_if_indices[16];
 135         int *if_indices;
 136         int num_if_indices;
 137
 138         int beacon_int;
 139         struct i802_bss bss;
 140         unsigned int ht_40mhz_scan:1;
 141
 142         int last_freq;
 143         int last_freq_ht;
 144         struct hostapd_neighbor_bss *neighbors;
 145         size_t num_neighbors;
 146 #endif /* HOSTAPD */
 147 };
 148
 149
 150 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 151                                             void *timeout_ctx);
 152 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
 153                                        int mode);
 154 static int
 155 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 156
 157 #ifdef CONFIG_AP
 158 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 159                                  int ifidx);
 160 #endif /* CONFIG_AP */
 161
 162 #ifdef HOSTAPD
 163 static void handle_frame(struct wpa_driver_nl80211_data *drv,
 164                          u8 *buf, size_t len,
 165                          struct hostapd_frame_info *hfi,
 166                          enum ieee80211_msg_type msg_type);
 167 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 168 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 169 #endif /* HOSTAPD */
 170
 171
 172 /* nl80211 code */
 173 static int ack_handler(struct nl_msg *msg, void *arg)
 174 {
 175         int *err = arg;
 176         *err = 0;
 177         return NL_STOP;
 178 }
 179
 180 static int finish_handler(struct nl_msg *msg, void *arg)
 181 {
 182         int *ret = arg;
 183         *ret = 0;
 184         return NL_SKIP;
 185 }
 186
 187 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 188                          void *arg)
 189 {
 190         int *ret = arg;
 191         *ret = err->error;
 192         return NL_SKIP;
 193 }
 194
 195
 196 static int no_seq_check(struct nl_msg *msg, void *arg)
 197 {
 198         return NL_OK;
 199 }
 200
 201
 202 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 203                               struct nl_msg *msg,
 204                               int (*valid_handler)(struct nl_msg *, void *),
 205                               void *valid_data)
 206 {
 207         struct nl_cb *cb;
 208         int err = -ENOMEM;
 209
 210         cb = nl_cb_clone(drv->nl_cb);
 211         if (!cb)
 212                 goto out;
 213
 214         err = nl_send_auto_complete(drv->nl_handle, msg);
 215         if (err < 0)
 216                 goto out;
 217
 218         err = 1;
 219
 220         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 221         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 222         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 223
 224         if (valid_handler)
 225                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 226                           valid_handler, valid_data);
 227
 228         while (err > 0)
 229                 nl_recvmsgs(drv->nl_handle, cb);
 230  out:
 231         nl_cb_put(cb);
 232         nlmsg_free(msg);
 233         return err;
 234 }
 235
 236
 237 struct family_data {
 238         const char *group;
 239         int id;
 240 };
 241
 242
 243 static int family_handler(struct nl_msg *msg, void *arg)
 244 {
 245         struct family_data *res = arg;
 246         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 247         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 248         struct nlattr *mcgrp;
 249         int i;
 250
 251         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 252                   genlmsg_attrlen(gnlh, 0), NULL);
 253         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 254                 return NL_SKIP;
 255
 256         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 257                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 258                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 259                           nla_len(mcgrp), NULL);
 260                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 261                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 262                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 263                                res->group,
 264                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 265                         continue;
 266                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 267                 break;
 268         };
 269
 270         return NL_SKIP;
 271 }
 272
 273
 274 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 275                                const char *family, const char *group)
 276 {
 277         struct nl_msg *msg;
 278         int ret = -1;
 279         struct family_data res = { group, -ENOENT };
 280
 281         msg = nlmsg_alloc();
 282         if (!msg)
 283                 return -ENOMEM;
 284         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 285                     0, 0, CTRL_CMD_GETFAMILY, 0);
 286         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 287
 288         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 289         msg = NULL;
 290         if (ret == 0)
 291                 ret = res.id;
 292
 293 nla_put_failure:
 294         nlmsg_free(msg);
 295         return ret;
 296 }
 297
 298
 299 static int wpa_driver_nl80211_send_oper_ifla(
 300         struct wpa_driver_nl80211_data *drv,
 301         int linkmode, int operstate)
 302 {
 303         struct {
 304                 struct nlmsghdr hdr;
 305                 struct ifinfomsg ifinfo;
 306                 char opts[16];
 307         } req;
 308         struct rtattr *rta;
 309         static int nl_seq;
 310         ssize_t ret;
 311
 312         os_memset(&req, 0, sizeof(req));
 313
 314         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 315         req.hdr.nlmsg_type = RTM_SETLINK;
 316         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 317         req.hdr.nlmsg_seq = ++nl_seq;
 318         req.hdr.nlmsg_pid = 0;
 319
 320         req.ifinfo.ifi_family = AF_UNSPEC;
 321         req.ifinfo.ifi_type = 0;
 322         req.ifinfo.ifi_index = drv->ifindex;
 323         req.ifinfo.ifi_flags = 0;
 324         req.ifinfo.ifi_change = 0;
 325
 326         if (linkmode != -1) {
 327                 rta = (struct rtattr *)
 328                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 329                 rta->rta_type = IFLA_LINKMODE;
 330                 rta->rta_len = RTA_LENGTH(sizeof(char));
 331                 *((char *) RTA_DATA(rta)) = linkmode;
 332                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 333                         RTA_LENGTH(sizeof(char));
 334         }
 335         if (operstate != -1) {
 336                 rta = (struct rtattr *)
 337                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 338                 rta->rta_type = IFLA_OPERSTATE;
 339                 rta->rta_len = RTA_LENGTH(sizeof(char));
 340                 *((char *) RTA_DATA(rta)) = operstate;
 341                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 342                         RTA_LENGTH(sizeof(char));
 343         }
 344
 345         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 346                    linkmode, operstate);
 347
 348         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 349         if (ret < 0) {
 350                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 351                            "%s (assume operstate is not supported)",
 352                            strerror(errno));
 353         }
 354
 355         return ret < 0 ? -1 : 0;
 356 }
 357
 358
 359 static int wpa_driver_nl80211_set_auth_param(
 360         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 361 {
 362         struct iwreq iwr;
 363         int ret = 0;
 364
 365         os_memset(&iwr, 0, sizeof(iwr));
 366         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 367         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 368         iwr.u.param.value = value;
 369
 370         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 371                 if (errno != EOPNOTSUPP) {
 372                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 373                                    "value 0x%x) failed: %s)",
 374                                    idx, value, strerror(errno));
 375                 }
 376                 ret = errno == EOPNOTSUPP ? -2 : -1;
 377         }
 378
 379         return ret;
 380 }
 381
 382
 383 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 384 {
 385         struct wpa_driver_nl80211_data *drv = priv;
 386         if (!drv->associated)
 387                 return -1;
 388         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 389         return 0;
 390 }
 391
 392
 393 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 394 {
 395         struct wpa_driver_nl80211_data *drv = priv;
 396         if (!drv->associated)
 397                 return -1;
 398         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 399         return drv->ssid_len;
 400 }
 401
 402
 403 #ifndef HOSTAPD
 404 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 405                                           void *ctx, char *buf, size_t len,
 406                                           int del)
 407 {
 408         union wpa_event_data event;
 409
 410         os_memset(&event, 0, sizeof(event));
 411         if (len > sizeof(event.interface_status.ifname))
 412                 len = sizeof(event.interface_status.ifname) - 1;
 413         os_memcpy(event.interface_status.ifname, buf, len);
 414         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 415                 EVENT_INTERFACE_ADDED;
 416
 417         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 418                    del ? "DEL" : "NEW",
 419                    event.interface_status.ifname,
 420                    del ? "removed" : "added");
 421
 422         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 423                 if (del)
 424                         drv->if_removed = 1;
 425                 else
 426                         drv->if_removed = 0;
 427         }
 428
 429         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 430 }
 431
 432
 433 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 434                                          struct nlmsghdr *h)
 435 {
 436         struct ifinfomsg *ifi;
 437         int attrlen, _nlmsg_len, rta_len;
 438         struct rtattr *attr;
 439
 440         ifi = NLMSG_DATA(h);
 441
 442         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 443
 444         attrlen = h->nlmsg_len - _nlmsg_len;
 445         if (attrlen < 0)
 446                 return 0;
 447
 448         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 449
 450         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 451         while (RTA_OK(attr, attrlen)) {
 452                 if (attr->rta_type == IFLA_IFNAME) {
 453                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 454                             == 0)
 455                                 return 1;
 456                         else
 457                                 break;
 458                 }
 459                 attr = RTA_NEXT(attr, attrlen);
 460         }
 461
 462         return 0;
 463 }
 464
 465
 466 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 467                                           int ifindex, struct nlmsghdr *h)
 468 {
 469         if (drv->ifindex == ifindex)
 470                 return 1;
 471
 472         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 473                 drv->ifindex = if_nametoindex(drv->ifname);
 474                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 475                            "interface");
 476                 wpa_driver_nl80211_finish_drv_init(drv);
 477                 return 1;
 478         }
 479
 480         return 0;
 481 }
 482
 483
 484 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 485                                               void *ctx, struct nlmsghdr *h,
 486                                               size_t len)
 487 {
 488         struct ifinfomsg *ifi;
 489         int attrlen, _nlmsg_len, rta_len;
 490         struct rtattr * attr;
 491
 492         if (len < sizeof(*ifi))
 493                 return;
 494
 495         ifi = NLMSG_DATA(h);
 496
 497         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 498                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 499                            ifi->ifi_index);
 500                 return;
 501         }
 502
 503         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 504                    "(%s%s%s%s)",
 505                    drv->operstate, ifi->ifi_flags,
 506                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 507                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 508                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 509                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 510         /*
 511          * Some drivers send the association event before the operup event--in
 512          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 513          * fails. This will hit us when wpa_supplicant does not need to do
 514          * IEEE 802.1X authentication
 515          */
 516         if (drv->operstate == 1 &&
 517             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 518             !(ifi->ifi_flags & IFF_RUNNING))
 519                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 520
 521         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 522
 523         attrlen = h->nlmsg_len - _nlmsg_len;
 524         if (attrlen < 0)
 525                 return;
 526
 527         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 528
 529         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 530         while (RTA_OK(attr, attrlen)) {
 531                 if (attr->rta_type == IFLA_IFNAME) {
 532                         wpa_driver_nl80211_event_link(
 533                                 drv, ctx,
 534                                 ((char *) attr) + rta_len,
 535                                 attr->rta_len - rta_len, 0);
 536                 }
 537                 attr = RTA_NEXT(attr, attrlen);
 538         }
 539 }
 540
 541
 542 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 543                                               void *ctx, struct nlmsghdr *h,
 544                                               size_t len)
 545 {
 546         struct ifinfomsg *ifi;
 547         int attrlen, _nlmsg_len, rta_len;
 548         struct rtattr * attr;
 549
 550         if (len < sizeof(*ifi))
 551                 return;
 552
 553         ifi = NLMSG_DATA(h);
 554
 555         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 556
 557         attrlen = h->nlmsg_len - _nlmsg_len;
 558         if (attrlen < 0)
 559                 return;
 560
 561         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 562
 563         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 564         while (RTA_OK(attr, attrlen)) {
 565                 if (attr->rta_type == IFLA_IFNAME) {
 566                         wpa_driver_nl80211_event_link(
 567                                 drv, ctx,
 568                                 ((char *) attr) + rta_len,
 569                                 attr->rta_len - rta_len, 1);
 570                 }
 571                 attr = RTA_NEXT(attr, attrlen);
 572         }
 573 }
 574
 575
 576 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 577                                                   void *sock_ctx)
 578 {
 579         char buf[8192];
 580         int left;
 581         struct sockaddr_nl from;
 582         socklen_t fromlen;
 583         struct nlmsghdr *h;
 584         int max_events = 10;
 585
 586 try_again:
 587         fromlen = sizeof(from);
 588         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 589                         (struct sockaddr *) &from, &fromlen);
 590         if (left < 0) {
 591                 if (errno != EINTR && errno != EAGAIN)
 592                         perror("recvfrom(netlink)");
 593                 return;
 594         }
 595
 596         h = (struct nlmsghdr *) buf;
 597         while (left >= (int) sizeof(*h)) {
 598                 int len, plen;
 599
 600                 len = h->nlmsg_len;
 601                 plen = len - sizeof(*h);
 602                 if (len > left || plen < 0) {
 603                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 604                                    "len=%d left=%d plen=%d",
 605                                    len, left, plen);
 606                         break;
 607                 }
 608
 609                 switch (h->nlmsg_type) {
 610                 case RTM_NEWLINK:
 611                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 612                                                           h, plen);
 613                         break;
 614                 case RTM_DELLINK:
 615                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 616                                                           h, plen);
 617                         break;
 618                 }
 619
 620                 len = NLMSG_ALIGN(len);
 621                 left -= len;
 622                 h = (struct nlmsghdr *) ((char *) h + len);
 623         }
 624
 625         if (left > 0) {
 626                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 627                            "message", left);
 628         }
 629
 630         if (--max_events > 0) {
 631                 /*
 632                  * Try to receive all events in one eloop call in order to
 633                  * limit race condition on cases where AssocInfo event, Assoc
 634                  * event, and EAPOL frames are received more or less at the
 635                  * same time. We want to process the event messages first
 636                  * before starting EAPOL processing.
 637                  */
 638                 goto try_again;
 639         }
 640 }
 641
 642
 643 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 644                             const u8 *frame, size_t len)
 645 {
 646         const struct ieee80211_mgmt *mgmt;
 647         union wpa_event_data event;
 648
 649         mgmt = (const struct ieee80211_mgmt *) frame;
 650         if (len < 24 + sizeof(mgmt->u.auth)) {
 651                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 652                            "frame");
 653                 return;
 654         }
 655
 656         os_memset(&event, 0, sizeof(event));
 657         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 658         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 659         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 660         if (len > 24 + sizeof(mgmt->u.auth)) {
 661                 event.auth.ies = mgmt->u.auth.variable;
 662                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 663         }
 664
 665         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 666 }
 667
 668
 669 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 670                             const u8 *frame, size_t len)
 671 {
 672         const struct ieee80211_mgmt *mgmt;
 673         union wpa_event_data event;
 674         u16 status;
 675
 676         mgmt = (const struct ieee80211_mgmt *) frame;
 677         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 678                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 679                            "frame");
 680                 return;
 681         }
 682
 683         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 684         if (status != WLAN_STATUS_SUCCESS) {
 685                 os_memset(&event, 0, sizeof(event));
 686                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 687                         event.assoc_reject.resp_ies =
 688                                 (u8 *) mgmt->u.assoc_resp.variable;
 689                         event.assoc_reject.resp_ies_len =
 690                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 691                 }
 692                 event.assoc_reject.status_code = status;
 693
 694                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 695                 return;
 696         }
 697
 698         drv->associated = 1;
 699         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 700
 701         os_memset(&event, 0, sizeof(event));
 702         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 703                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 704                 event.assoc_info.resp_ies_len =
 705                         len - 24 - sizeof(mgmt->u.assoc_resp);
 706         }
 707
 708         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 709 }
 710
 711
 712 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 713                        enum nl80211_commands cmd, struct nlattr *frame)
 714 {
 715         if (frame == NULL) {
 716                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 717                            "data", cmd);
 718                 return;
 719         }
 720
 721         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 722         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 723                     nla_data(frame), nla_len(frame));
 724
 725         switch (cmd) {
 726         case NL80211_CMD_AUTHENTICATE:
 727                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 728                 break;
 729         case NL80211_CMD_ASSOCIATE:
 730                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 731                 break;
 732         case NL80211_CMD_DEAUTHENTICATE:
 733                 drv->associated = 0;
 734                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 735                 break;
 736         case NL80211_CMD_DISASSOCIATE:
 737                 drv->associated = 0;
 738                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 739                 break;
 740         default:
 741                 break;
 742         }
 743 }
 744
 745 #endif /* HOSTAPD */
 746
 747
 748 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 749                                            struct nlattr *tb[])
 750 {
 751 #ifdef HOSTAPD
 752         if (tb[NL80211_ATTR_MAC])
 753                 hostapd_michael_mic_failure(drv->hapd,
 754                                             nla_data(tb[NL80211_ATTR_MAC]));
 755 #else /* HOSTAPD */
 756         union wpa_event_data data;
 757
 758         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 759         os_memset(&data, 0, sizeof(data));
 760         if (tb[NL80211_ATTR_MAC]) {
 761                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 762                             nla_data(tb[NL80211_ATTR_MAC]),
 763                             nla_len(tb[NL80211_ATTR_MAC]));
 764         }
 765         if (tb[NL80211_ATTR_KEY_SEQ]) {
 766                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 767                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 768                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 769         }
 770         if (tb[NL80211_ATTR_KEY_TYPE]) {
 771                 enum nl80211_key_type key_type =
 772                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 773                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 774                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 775                         data.michael_mic_failure.unicast = 1;
 776         } else
 777                 data.michael_mic_failure.unicast = 1;
 778
 779         if (tb[NL80211_ATTR_KEY_IDX]) {
 780                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 781                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 782         }
 783
 784         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 785 #endif /* HOSTAPD */
 786 }
 787
 788
 789 static int process_event(struct nl_msg *msg, void *arg)
 790 {
 791         struct wpa_driver_nl80211_data *drv = arg;
 792         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 793         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 794
 795         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 796                   genlmsg_attrlen(gnlh, 0), NULL);
 797
 798         if (tb[NL80211_ATTR_IFINDEX]) {
 799                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 800                 if (ifindex != drv->ifindex) {
 801                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 802                                    " for foreign interface (ifindex %d)",
 803                                    gnlh->cmd, ifindex);
 804                         return NL_SKIP;
 805                 }
 806         }
 807
 808         switch (gnlh->cmd) {
 809 #ifndef HOSTAPD
 810         case NL80211_CMD_NEW_SCAN_RESULTS:
 811                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 812                 drv->scan_complete_events = 1;
 813                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 814                                      drv->ctx);
 815                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 816                 break;
 817         case NL80211_CMD_SCAN_ABORTED:
 818                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 819                 /*
 820                  * Need to indicate that scan results are available in order
 821                  * not to make wpa_supplicant stop its scanning.
 822                  */
 823                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 824                                      drv->ctx);
 825                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 826                 break;
 827         case NL80211_CMD_AUTHENTICATE:
 828         case NL80211_CMD_ASSOCIATE:
 829         case NL80211_CMD_DEAUTHENTICATE:
 830         case NL80211_CMD_DISASSOCIATE:
 831                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
 832                 break;
 833 #endif /* HOSTAPD */
 834         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 835                 mlme_event_michael_mic_failure(drv, tb);
 836                 break;
 837         default:
 838                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 839                            "(cmd=%d)", gnlh->cmd);
 840                 break;
 841         }
 842
 843         return NL_SKIP;
 844 }
 845
 846
 847 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 848                                              void *sock_ctx)
 849 {
 850         struct nl_cb *cb;
 851         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 852
 853         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 854
 855         cb = nl_cb_clone(drv->nl_cb);
 856         if (!cb)
 857                 return;
 858         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 859         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 860         nl_recvmsgs(drv->nl_handle, cb);
 861         nl_cb_put(cb);
 862 }
 863
 864
 865 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 866                                    const char *ifname, int dev_up)
 867 {
 868         struct ifreq ifr;
 869
 870         if (drv->ioctl_sock < 0)
 871                 return -1;
 872
 873         os_memset(&ifr, 0, sizeof(ifr));
 874         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 875
 876         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 877                 perror("ioctl[SIOCGIFFLAGS]");
 878                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 879                            ifname);
 880                 return -1;
 881         }
 882
 883         if (dev_up) {
 884                 if (ifr.ifr_flags & IFF_UP)
 885                         return 0;
 886                 ifr.ifr_flags |= IFF_UP;
 887         } else {
 888                 if (!(ifr.ifr_flags & IFF_UP))
 889                         return 0;
 890                 ifr.ifr_flags &= ~IFF_UP;
 891         }
 892
 893         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 894                 perror("ioctl[SIOCSIFFLAGS]");
 895                 return -1;
 896         }
 897
 898         return 0;
 899 }
 900
 901
 902 /**
 903  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 904  * @priv: driver_nl80211 private data
 905  * @alpha2_arg: country to which to switch to
 906  * Returns: 0 on success, -1 on failure
 907  *
 908  * This asks nl80211 to set the regulatory domain for given
 909  * country ISO / IEC alpha2.
 910  */
 911 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 912 {
 913         struct wpa_driver_nl80211_data *drv = priv;
 914         char alpha2[3];
 915         struct nl_msg *msg;
 916
 917         msg = nlmsg_alloc();
 918         if (!msg)
 919                 return -ENOMEM;
 920
 921         alpha2[0] = alpha2_arg[0];
 922         alpha2[1] = alpha2_arg[1];
 923         alpha2[2] = '\0';
 924
 925         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 926                     0, NL80211_CMD_REQ_SET_REG, 0);
 927
 928         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 929         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 930                 return -EINVAL;
 931         return 0;
 932 nla_put_failure:
 933         return -EINVAL;
 934 }
 935
 936
 937 struct wiphy_info_data {
 938         int max_scan_ssids;
 939         int ap_supported;
 940 };
 941
 942
 943 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 944 {
 945         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 946         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 947         struct wiphy_info_data *info = arg;
 948
 949         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 950                   genlmsg_attrlen(gnlh, 0), NULL);
 951
 952         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 953                 info->max_scan_ssids =
 954                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 955
 956         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 957                 struct nlattr *nl_mode;
 958                 int i;
 959                 nla_for_each_nested(nl_mode,
 960                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 961                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 962                                 info->ap_supported = 1;
 963                                 break;
 964                         }
 965                 }
 966         }
 967
 968         return NL_SKIP;
 969 }
 970
 971
 972 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 973                                        struct wiphy_info_data *info)
 974 {
 975         struct nl_msg *msg;
 976
 977         os_memset(info, 0, sizeof(*info));
 978         msg = nlmsg_alloc();
 979         if (!msg)
 980                 return -1;
 981
 982         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 983                     0, NL80211_CMD_GET_WIPHY, 0);
 984
 985         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 986
 987         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
 988                 return 0;
 989         msg = NULL;
 990 nla_put_failure:
 991         nlmsg_free(msg);
 992         return -1;
 993 }
 994
 995
 996 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
 997 {
 998         struct wiphy_info_data info;
 999         if (wpa_driver_nl80211_get_info(drv, &info))
1000                 return;
1001         drv->has_capability = 1;
1002         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1003         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1004                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1005                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1006                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1007         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1008                 WPA_DRIVER_CAPA_ENC_WEP104 |
1009                 WPA_DRIVER_CAPA_ENC_TKIP |
1010                 WPA_DRIVER_CAPA_ENC_CCMP;
1011
1012         drv->capa.max_scan_ssids = info.max_scan_ssids;
1013         if (info.ap_supported)
1014                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1015 }
1016
1017
1018 /**
1019  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1020  * @ctx: context to be used when calling wpa_supplicant functions,
1021  * e.g., wpa_supplicant_event()
1022  * @ifname: interface name, e.g., wlan0
1023  * Returns: Pointer to private data, %NULL on failure
1024  */
1025 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1026 {
1027         int s, ret;
1028         struct sockaddr_nl local;
1029         struct wpa_driver_nl80211_data *drv;
1030
1031         drv = os_zalloc(sizeof(*drv));
1032         if (drv == NULL)
1033                 return NULL;
1034         drv->ctx = ctx;
1035         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1036 #ifdef CONFIG_AP
1037         drv->monitor_ifidx = -1;
1038         drv->monitor_sock = -1;
1039 #endif /* CONFIG_AP */
1040
1041         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1042         if (drv->nl_cb == NULL) {
1043                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1044                            "callbacks");
1045                 goto err1;
1046         }
1047
1048         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1049         if (drv->nl_handle == NULL) {
1050                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1051                            "callbacks");
1052                 goto err2;
1053         }
1054
1055         if (genl_connect(drv->nl_handle)) {
1056                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1057                            "netlink");
1058                 goto err3;
1059         }
1060
1061         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1062         if (drv->nl_cache == NULL) {
1063                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1064                            "netlink cache");
1065                 goto err3;
1066         }
1067
1068         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1069         if (drv->nl80211 == NULL) {
1070                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1071                            "found");
1072                 goto err4;
1073         }
1074
1075         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1076         if (ret >= 0)
1077                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1078         if (ret < 0) {
1079                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1080                            "membership for scan events: %d (%s)",
1081                            ret, strerror(-ret));
1082                 goto err4;
1083         }
1084
1085         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1086         if (ret >= 0)
1087                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1088         if (ret < 0) {
1089                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1090                            "membership for mlme events: %d (%s)",
1091                            ret, strerror(-ret));
1092                 goto err4;
1093         }
1094         drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1095
1096         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1097                                  wpa_driver_nl80211_event_receive, drv, ctx);
1098
1099         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1100         if (drv->ioctl_sock < 0) {
1101                 perror("socket(PF_INET,SOCK_DGRAM)");
1102                 goto err5;
1103         }
1104
1105         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1106         if (s < 0) {
1107                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1108                 goto err6;
1109         }
1110
1111         os_memset(&local, 0, sizeof(local));
1112         local.nl_family = AF_NETLINK;
1113         local.nl_groups = RTMGRP_LINK;
1114         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1115                 perror("bind(netlink)");
1116                 close(s);
1117                 goto err6;
1118         }
1119
1120 #ifndef HOSTAPD
1121         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1122                                  ctx);
1123 #endif /* HOSTAPD */
1124         drv->link_event_sock = s;
1125
1126         if (wpa_driver_nl80211_finish_drv_init(drv))
1127                 goto err7;
1128
1129         return drv;
1130
1131 err7:
1132         eloop_unregister_read_sock(drv->link_event_sock);
1133         close(drv->link_event_sock);
1134 err6:
1135         close(drv->ioctl_sock);
1136 err5:
1137         genl_family_put(drv->nl80211);
1138 err4:
1139         nl_cache_free(drv->nl_cache);
1140 err3:
1141         nl_handle_destroy(drv->nl_handle);
1142 err2:
1143         nl_cb_put(drv->nl_cb);
1144 err1:
1145         os_free(drv);
1146         return NULL;
1147 }
1148
1149
1150 static int
1151 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1152 {
1153         drv->ifindex = if_nametoindex(drv->ifname);
1154
1155         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1156                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1157                            "use managed mode");
1158         }
1159
1160         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1161                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1162                            "UP", drv->ifname);
1163                 return -1;
1164         }
1165
1166         wpa_driver_nl80211_capa(drv);
1167
1168         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1169
1170         return 0;
1171 }
1172
1173
1174 /**
1175  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1176  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1177  *
1178  * Shut down driver interface and processing of driver events. Free
1179  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1180  */
1181 static void wpa_driver_nl80211_deinit(void *priv)
1182 {
1183         struct wpa_driver_nl80211_data *drv = priv;
1184
1185 #ifdef CONFIG_AP
1186         if (drv->monitor_ifidx >= 0)
1187                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1188         if (drv->monitor_sock >= 0) {
1189                 eloop_unregister_read_sock(drv->monitor_sock);
1190                 close(drv->monitor_sock);
1191         }
1192 #endif /* CONFIG_AP */
1193
1194         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1195
1196         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1197
1198         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1199
1200         eloop_unregister_read_sock(drv->link_event_sock);
1201
1202         hostapd_set_iface_flags(drv, drv->ifname, 0);
1203         wpa_driver_nl80211_set_mode(drv, 0);
1204
1205         close(drv->link_event_sock);
1206         close(drv->ioctl_sock);
1207
1208         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1209         genl_family_put(drv->nl80211);
1210         nl_cache_free(drv->nl_cache);
1211         nl_handle_destroy(drv->nl_handle);
1212         nl_cb_put(drv->nl_cb);
1213
1214         os_free(drv);
1215 }
1216
1217
1218 /**
1219  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1220  * @eloop_ctx: Unused
1221  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1222  *
1223  * This function can be used as registered timeout when starting a scan to
1224  * generate a scan completed event if the driver does not report this.
1225  */
1226 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1227 {
1228         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1229 #ifndef HOSTAPD
1230         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1231 #endif /* HOSTAPD */
1232 }
1233
1234
1235 /**
1236  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1237  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1238  * @params: Scan parameters
1239  * Returns: 0 on success, -1 on failure
1240  */
1241 static int wpa_driver_nl80211_scan(void *priv,
1242                                    struct wpa_driver_scan_params *params)
1243 {
1244         struct wpa_driver_nl80211_data *drv = priv;
1245         int ret = 0, timeout;
1246         struct nl_msg *msg, *ssids, *freqs;
1247         size_t i;
1248
1249         msg = nlmsg_alloc();
1250         ssids = nlmsg_alloc();
1251         freqs = nlmsg_alloc();
1252         if (!msg || !ssids || !freqs) {
1253                 nlmsg_free(msg);
1254                 nlmsg_free(ssids);
1255                 nlmsg_free(freqs);
1256                 return -1;
1257         }
1258
1259         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1260                     NL80211_CMD_TRIGGER_SCAN, 0);
1261
1262         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1263
1264         for (i = 0; i < params->num_ssids; i++) {
1265                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1266                         params->ssids[i].ssid);
1267         }
1268         if (params->num_ssids)
1269                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1270
1271         if (params->extra_ies) {
1272                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1273                         params->extra_ies);
1274         }
1275
1276         if (params->freqs) {
1277                 for (i = 0; params->freqs[i]; i++)
1278                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1279                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1280         }
1281
1282         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1283         msg = NULL;
1284         if (ret) {
1285                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1286                            "(%s)", ret, strerror(-ret));
1287                 goto nla_put_failure;
1288         }
1289
1290         /* Not all drivers generate "scan completed" wireless event, so try to
1291          * read results after a timeout. */
1292         timeout = 10;
1293         if (drv->scan_complete_events) {
1294                 /*
1295                  * The driver seems to deliver events to notify when scan is
1296                  * complete, so use longer timeout to avoid race conditions
1297                  * with scanning and following association request.
1298                  */
1299                 timeout = 30;
1300         }
1301         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1302                    "seconds", ret, timeout);
1303         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1304         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1305                                drv, drv->ctx);
1306
1307 nla_put_failure:
1308         nlmsg_free(ssids);
1309         nlmsg_free(msg);
1310         nlmsg_free(freqs);
1311         return ret;
1312 }
1313
1314
1315 static int bss_info_handler(struct nl_msg *msg, void *arg)
1316 {
1317         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1318         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1319         struct nlattr *bss[NL80211_BSS_MAX + 1];
1320         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1321                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1322                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1323                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1324                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1325                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1326                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1327                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1328                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1329         };
1330         struct wpa_scan_results *res = arg;
1331         struct wpa_scan_res **tmp;
1332         struct wpa_scan_res *r;
1333         const u8 *ie;
1334         size_t ie_len;
1335
1336         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1337                   genlmsg_attrlen(gnlh, 0), NULL);
1338         if (!tb[NL80211_ATTR_BSS])
1339                 return NL_SKIP;
1340         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1341                              bss_policy))
1342                 return NL_SKIP;
1343         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1344                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1345                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1346         } else {
1347                 ie = NULL;
1348                 ie_len = 0;
1349         }
1350
1351         r = os_zalloc(sizeof(*r) + ie_len);
1352         if (r == NULL)
1353                 return NL_SKIP;
1354         if (bss[NL80211_BSS_BSSID])
1355                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1356                           ETH_ALEN);
1357         if (bss[NL80211_BSS_FREQUENCY])
1358                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1359         if (bss[NL80211_BSS_BEACON_INTERVAL])
1360                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1361         if (bss[NL80211_BSS_CAPABILITY])
1362                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1363         r->flags |= WPA_SCAN_NOISE_INVALID;
1364         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1365                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1366                 r->level /= 100; /* mBm to dBm */
1367                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1368         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1369                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1370                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1371         } else
1372                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1373         if (bss[NL80211_BSS_TSF])
1374                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1375         r->ie_len = ie_len;
1376         if (ie)
1377                 os_memcpy(r + 1, ie, ie_len);
1378
1379         tmp = os_realloc(res->res,
1380                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1381         if (tmp == NULL) {
1382                 os_free(r);
1383                 return NL_SKIP;
1384         }
1385         tmp[res->num++] = r;
1386         res->res = tmp;
1387
1388         return NL_SKIP;
1389 }
1390
1391
1392 /**
1393  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1394  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1395  * Returns: Scan results on success, -1 on failure
1396  */
1397 static struct wpa_scan_results *
1398 wpa_driver_nl80211_get_scan_results(void *priv)
1399 {
1400         struct wpa_driver_nl80211_data *drv = priv;
1401         struct nl_msg *msg;
1402         struct wpa_scan_results *res;
1403         int ret;
1404
1405         res = os_zalloc(sizeof(*res));
1406         if (res == NULL)
1407                 return 0;
1408         msg = nlmsg_alloc();
1409         if (!msg)
1410                 goto nla_put_failure;
1411
1412         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1413                     NL80211_CMD_GET_SCAN, 0);
1414         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1415
1416         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1417         msg = NULL;
1418         if (ret == 0) {
1419                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1420                            (unsigned long) res->num);
1421                 return res;
1422         }
1423         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1424                    "(%s)", ret, strerror(-ret));
1425 nla_put_failure:
1426         nlmsg_free(msg);
1427         wpa_scan_results_free(res);
1428         return NULL;
1429 }
1430
1431
1432 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1433                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1434                        const u8 *seq, size_t seq_len,
1435                        const u8 *key, size_t key_len)
1436 {
1437         struct nl_msg *msg;
1438         int ret;
1439
1440         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1441                    "set_tx=%d seq_len=%lu key_len=%lu",
1442                    __func__, ifindex, alg, addr, key_idx, set_tx,
1443                    (unsigned long) seq_len, (unsigned long) key_len);
1444
1445         msg = nlmsg_alloc();
1446         if (!msg)
1447                 return -ENOMEM;
1448
1449         if (alg == WPA_ALG_NONE) {
1450                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1451                             0, NL80211_CMD_DEL_KEY, 0);
1452         } else {
1453                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1454                             0, NL80211_CMD_NEW_KEY, 0);
1455                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1456                 switch (alg) {
1457                 case WPA_ALG_WEP:
1458                         if (key_len == 5)
1459                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1460                                             0x000FAC01);
1461                         else
1462                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1463                                             0x000FAC05);
1464                         break;
1465                 case WPA_ALG_TKIP:
1466                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1467                         break;
1468                 case WPA_ALG_CCMP:
1469                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1470                         break;
1471                 case WPA_ALG_IGTK:
1472                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1473                         break;
1474                 default:
1475                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1476                                    "algorithm %d", __func__, alg);
1477                         nlmsg_free(msg);
1478                         return -1;
1479                 }
1480         }
1481
1482         if (seq)
1483                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1484
1485         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1486         {
1487                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1488                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1489         }
1490         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1491         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1492
1493         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1494         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1495                 ret = 0;
1496         if (ret)
1497                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1498                            ret, strerror(-ret));
1499
1500         /*
1501          * If we failed or don't need to set the default TX key (below),
1502          * we're done here.
1503          */
1504         if (ret || !set_tx || alg == WPA_ALG_NONE)
1505                 return ret;
1506 #ifdef HOSTAPD /* FIX: is this needed? */
1507         if (addr)
1508                 return ret;
1509 #endif /* HOSTAPD */
1510
1511         msg = nlmsg_alloc();
1512         if (!msg)
1513                 return -ENOMEM;
1514
1515         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1516                     0, NL80211_CMD_SET_KEY, 0);
1517         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1518         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1519         if (alg == WPA_ALG_IGTK)
1520                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1521         else
1522                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1523
1524         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1525         if (ret == -ENOENT)
1526                 ret = 0;
1527         if (ret)
1528                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1529                            "err=%d %s)", ret, strerror(-ret));
1530         return ret;
1531
1532 nla_put_failure:
1533         return -ENOBUFS;
1534 }
1535
1536
1537 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1538                                       const u8 *addr, int key_idx,
1539                                       int set_tx, const u8 *seq,
1540                                       size_t seq_len,
1541                                       const u8 *key, size_t key_len)
1542 {
1543         struct wpa_driver_nl80211_data *drv = priv;
1544         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1545                            seq_len, key, key_len);
1546 }
1547
1548
1549 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1550                                    const u8 *addr, int cmd, u16 reason_code)
1551 {
1552         int ret = -1;
1553         struct nl_msg *msg;
1554
1555         msg = nlmsg_alloc();
1556         if (!msg)
1557                 return -1;
1558
1559         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1560
1561         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1562         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1563         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1564
1565         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1566         msg = NULL;
1567         if (ret) {
1568                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1569                            "(%s)", ret, strerror(-ret));
1570                 goto nla_put_failure;
1571         }
1572         ret = 0;
1573
1574 nla_put_failure:
1575         nlmsg_free(msg);
1576         return ret;
1577 }
1578
1579
1580 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1581                                              int reason_code)
1582 {
1583         struct wpa_driver_nl80211_data *drv = priv;
1584         wpa_printf(MSG_DEBUG, "%s", __func__);
1585         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1586                                        reason_code);
1587 }
1588
1589
1590 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1591                                            int reason_code)
1592 {
1593         struct wpa_driver_nl80211_data *drv = priv;
1594         wpa_printf(MSG_DEBUG, "%s", __func__);
1595         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1596                                        reason_code);
1597 }
1598
1599
1600 static int wpa_driver_nl80211_authenticate(
1601         void *priv, struct wpa_driver_auth_params *params)
1602 {
1603         struct wpa_driver_nl80211_data *drv = priv;
1604         int ret = -1, i;
1605         struct nl_msg *msg;
1606         enum nl80211_auth_type type;
1607
1608         drv->associated = 0;
1609
1610         msg = nlmsg_alloc();
1611         if (!msg)
1612                 return -1;
1613
1614         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1615                    drv->ifindex);
1616
1617         for (i = 0; i < 4; i++) {
1618                 if (!params->wep_key[i])
1619                         continue;
1620                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1621                                            i == params->wep_tx_keyidx, NULL, 0,
1622                                            params->wep_key[i],
1623                                            params->wep_key_len[i]);
1624         }
1625
1626         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1627                     NL80211_CMD_AUTHENTICATE, 0);
1628
1629         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1630         if (params->bssid) {
1631                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1632                            MAC2STR(params->bssid));
1633                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1634         }
1635         if (params->freq) {
1636                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1637                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1638         }
1639         if (params->ssid) {
1640                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1641                                   params->ssid, params->ssid_len);
1642                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1643                         params->ssid);
1644         }
1645         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1646         if (params->ie)
1647                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1648         /*
1649          * TODO: if multiple auth_alg options enabled, try them one by one if
1650          * the AP rejects authentication due to unknown auth alg
1651          */
1652         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1653                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1654         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1655                 type = NL80211_AUTHTYPE_SHARED_KEY;
1656         else if (params->auth_alg & AUTH_ALG_LEAP)
1657                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1658         else if (params->auth_alg & AUTH_ALG_FT)
1659                 type = NL80211_AUTHTYPE_FT;
1660         else
1661                 goto nla_put_failure;
1662         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1663         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1664
1665         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1666         msg = NULL;
1667         if (ret) {
1668                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1669                            "(%s)", ret, strerror(-ret));
1670                 goto nla_put_failure;
1671         }
1672         ret = 0;
1673         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1674                    "successfully");
1675
1676 nla_put_failure:
1677         nlmsg_free(msg);
1678         return ret;
1679 }
1680
1681
1682 #if defined(CONFIG_AP) || defined(HOSTAPD)
1683
1684 struct phy_info_arg {
1685         u16 *num_modes;
1686         struct hostapd_hw_modes *modes;
1687 };
1688
1689 static int phy_info_handler(struct nl_msg *msg, void *arg)
1690 {
1691         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1692         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1693         struct phy_info_arg *phy_info = arg;
1694
1695         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1696
1697         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1698         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1699                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1700                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1701                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1702                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1703                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1704                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1705         };
1706
1707         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1708         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1709                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1710                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1711         };
1712
1713         struct nlattr *nl_band;
1714         struct nlattr *nl_freq;
1715         struct nlattr *nl_rate;
1716         int rem_band, rem_freq, rem_rate;
1717         struct hostapd_hw_modes *mode;
1718         int idx, mode_is_set;
1719
1720         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1721                   genlmsg_attrlen(gnlh, 0), NULL);
1722
1723         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1724                 return NL_SKIP;
1725
1726         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1727                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1728                 if (!mode)
1729                         return NL_SKIP;
1730                 phy_info->modes = mode;
1731
1732                 mode_is_set = 0;
1733
1734                 mode = &phy_info->modes[*(phy_info->num_modes)];
1735                 memset(mode, 0, sizeof(*mode));
1736                 *(phy_info->num_modes) += 1;
1737
1738                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1739                           nla_len(nl_band), NULL);
1740
1741                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1742                         mode->ht_capab = nla_get_u16(
1743                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1744                 }
1745
1746                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1747                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1748                                   nla_len(nl_freq), freq_policy);
1749                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1750                                 continue;
1751                         mode->num_channels++;
1752                 }
1753
1754                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1755                 if (!mode->channels)
1756                         return NL_SKIP;
1757
1758                 idx = 0;
1759
1760                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1761                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1762                                   nla_len(nl_freq), freq_policy);
1763                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1764                                 continue;
1765
1766                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1767                         mode->channels[idx].flag = 0;
1768
1769                         if (!mode_is_set) {
1770                                 /* crude heuristic */
1771                                 if (mode->channels[idx].freq < 4000)
1772                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1773                                 else
1774                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1775                                 mode_is_set = 1;
1776                         }
1777
1778                         /* crude heuristic */
1779                         if (mode->channels[idx].freq < 4000)
1780                                 if (mode->channels[idx].freq == 2484)
1781                                         mode->channels[idx].chan = 14;
1782                                 else
1783                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1784                         else
1785                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1786
1787                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1788                                 mode->channels[idx].flag |=
1789                                         HOSTAPD_CHAN_DISABLED;
1790                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1791                                 mode->channels[idx].flag |=
1792                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1793                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1794                                 mode->channels[idx].flag |=
1795                                         HOSTAPD_CHAN_NO_IBSS;
1796                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1797                                 mode->channels[idx].flag |=
1798                                         HOSTAPD_CHAN_RADAR;
1799
1800                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1801                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1802                                 mode->channels[idx].max_tx_power =
1803                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1804
1805                         idx++;
1806                 }
1807
1808                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1809                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1810                                   nla_len(nl_rate), rate_policy);
1811                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1812                                 continue;
1813                         mode->num_rates++;
1814                 }
1815
1816                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1817                 if (!mode->rates)
1818                         return NL_SKIP;
1819
1820                 idx = 0;
1821
1822                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1823                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1824                                   nla_len(nl_rate), rate_policy);
1825                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1826                                 continue;
1827                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1828
1829                         /* crude heuristic */
1830                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1831                             mode->rates[idx].rate > 200)
1832                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1833
1834                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1835                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1836
1837                         idx++;
1838                 }
1839         }
1840
1841         return NL_SKIP;
1842 }
1843
1844 static struct hostapd_hw_modes *
1845 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1846 {
1847         u16 m;
1848         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1849         int i, mode11g_idx = -1;
1850
1851         /* If only 802.11g mode is included, use it to construct matching
1852          * 802.11b mode data. */
1853
1854         for (m = 0; m < *num_modes; m++) {
1855                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1856                         return modes; /* 802.11b already included */
1857                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1858                         mode11g_idx = m;
1859         }
1860
1861         if (mode11g_idx < 0)
1862                 return modes; /* 2.4 GHz band not supported at all */
1863
1864         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1865         if (nmodes == NULL)
1866                 return modes; /* Could not add 802.11b mode */
1867
1868         mode = &nmodes[*num_modes];
1869         os_memset(mode, 0, sizeof(*mode));
1870         (*num_modes)++;
1871         modes = nmodes;
1872
1873         mode->mode = HOSTAPD_MODE_IEEE80211B;
1874
1875         mode11g = &modes[mode11g_idx];
1876         mode->num_channels = mode11g->num_channels;
1877         mode->channels = os_malloc(mode11g->num_channels *
1878                                    sizeof(struct hostapd_channel_data));
1879         if (mode->channels == NULL) {
1880                 (*num_modes)--;
1881                 return modes; /* Could not add 802.11b mode */
1882         }
1883         os_memcpy(mode->channels, mode11g->channels,
1884                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
1885
1886         mode->num_rates = 0;
1887         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1888         if (mode->rates == NULL) {
1889                 os_free(mode->channels);
1890                 (*num_modes)--;
1891                 return modes; /* Could not add 802.11b mode */
1892         }
1893
1894         for (i = 0; i < mode11g->num_rates; i++) {
1895                 if (mode11g->rates[i].rate > 110 ||
1896                     mode11g->rates[i].flags &
1897                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1898                         continue;
1899                 mode->rates[mode->num_rates] = mode11g->rates[i];
1900                 mode->num_rates++;
1901                 if (mode->num_rates == 4)
1902                         break;
1903         }
1904
1905         if (mode->num_rates == 0) {
1906                 os_free(mode->channels);
1907                 os_free(mode->rates);
1908                 (*num_modes)--;
1909                 return modes; /* No 802.11b rates */
1910         }
1911
1912         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1913                    "information");
1914
1915         return modes;
1916 }
1917
1918
1919 static struct hostapd_hw_modes *
1920 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1921 {
1922         struct wpa_driver_nl80211_data *drv = priv;
1923         struct nl_msg *msg;
1924         struct phy_info_arg result = {
1925                 .num_modes = num_modes,
1926                 .modes = NULL,
1927         };
1928
1929         *num_modes = 0;
1930         *flags = 0;
1931
1932         msg = nlmsg_alloc();
1933         if (!msg)
1934                 return NULL;
1935
1936         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1937                     0, NL80211_CMD_GET_WIPHY, 0);
1938
1939         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1940
1941         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1942                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1943  nla_put_failure:
1944         return NULL;
1945 }
1946
1947
1948 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1949                                          const void *data, size_t len,
1950                                          int encrypt)
1951 {
1952         __u8 rtap_hdr[] = {
1953                 0x00, 0x00, /* radiotap version */
1954                 0x0e, 0x00, /* radiotap length */
1955                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1956                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1957                 0x00,       /* padding */
1958                 0x00, 0x00, /* RX and TX flags to indicate that */
1959                 0x00, 0x00, /* this is the injected frame directly */
1960         };
1961         struct iovec iov[2] = {
1962                 {
1963                         .iov_base = &rtap_hdr,
1964                         .iov_len = sizeof(rtap_hdr),
1965                 },
1966                 {
1967                         .iov_base = (void *) data,
1968                         .iov_len = len,
1969                 }
1970         };
1971         struct msghdr msg = {
1972                 .msg_name = NULL,
1973                 .msg_namelen = 0,
1974                 .msg_iov = iov,
1975                 .msg_iovlen = 2,
1976                 .msg_control = NULL,
1977                 .msg_controllen = 0,
1978                 .msg_flags = 0,
1979         };
1980
1981         if (encrypt)
1982                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
1983
1984         return sendmsg(drv->monitor_sock, &msg, 0);
1985 }
1986
1987
1988 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
1989                                         size_t data_len)
1990 {
1991         struct wpa_driver_nl80211_data *drv = priv;
1992         struct ieee80211_mgmt *mgmt;
1993         int do_not_encrypt = 0;
1994         u16 fc;
1995
1996         mgmt = (struct ieee80211_mgmt *) data;
1997         fc = le_to_host16(mgmt->frame_control);
1998
1999         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2000             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2001                 /*
2002                  * Only one of the authentication frame types is encrypted.
2003                  * In order for static WEP encryption to work properly (i.e.,
2004                  * to not encrypt the frame), we need to tell mac80211 about
2005                  * the frames that must not be encrypted.
2006                  */
2007                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2008                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2009                 if (auth_alg == WLAN_AUTH_OPEN ||
2010                     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2011                         do_not_encrypt = 1;
2012         }
2013
2014         return wpa_driver_nl80211_send_frame(drv, data, data_len,
2015                                              !do_not_encrypt);
2016 }
2017
2018 #endif /* CONFIG_AP || HOSTAPD */
2019
2020
2021 #ifdef CONFIG_AP
2022
2023 static int wpa_driver_nl80211_set_beacon(void *priv,
2024                                          const u8 *head, size_t head_len,
2025                                          const u8 *tail, size_t tail_len,
2026                                          int dtim_period)
2027 {
2028         struct wpa_driver_nl80211_data *drv = priv;
2029         struct nl_msg *msg;
2030         u8 cmd = NL80211_CMD_NEW_BEACON;
2031         int ret;
2032
2033         msg = nlmsg_alloc();
2034         if (!msg)
2035                 return -ENOMEM;
2036
2037         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2038                    drv->beacon_set);
2039         if (drv->beacon_set)
2040                 cmd = NL80211_CMD_SET_BEACON;
2041
2042         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2043                     0, cmd, 0);
2044         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2045         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2046         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2047         if (!drv->beacon_int)
2048                 drv->beacon_int = 100;
2049         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2050         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2051
2052         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2053         if (ret) {
2054                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2055                            ret, strerror(-ret));
2056         } else
2057                 drv->beacon_set = 1;
2058         return ret;
2059  nla_put_failure:
2060         return -ENOBUFS;
2061 }
2062
2063
2064 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2065 {
2066         struct wpa_driver_nl80211_data *drv = priv;
2067         struct nl_msg *msg;
2068
2069         drv->beacon_int = value;
2070
2071         if (!drv->beacon_set)
2072                 return 0;
2073
2074         msg = nlmsg_alloc();
2075         if (!msg)
2076                 return -ENOMEM;
2077
2078         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
2079                    "(beacon_set=%d)", value, drv->beacon_set);
2080         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2081                     0, NL80211_CMD_SET_BEACON, 0);
2082         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2083
2084         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2085
2086         return send_and_recv_msgs(drv, msg, NULL, NULL);
2087  nla_put_failure:
2088         return -ENOBUFS;
2089 }
2090
2091
2092 static int wpa_driver_nl80211_set_freq2(
2093         struct wpa_driver_nl80211_data *drv,
2094         struct wpa_driver_associate_params *params)
2095 {
2096         struct nl_msg *msg;
2097         int ret;
2098
2099         msg = nlmsg_alloc();
2100         if (!msg)
2101                 return -1;
2102
2103         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2104                     NL80211_CMD_SET_WIPHY, 0);
2105
2106         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2107
2108         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2109
2110         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2111         if (ret == 0)
2112                 return 0;
2113         wpa_printf(MSG_DEBUG, "nl80211: MLME Failed to set channel (freq=%d): "
2114                    "%d (%s)", params->freq, ret, strerror(-ret));
2115 nla_put_failure:
2116         return -1;
2117 }
2118
2119 #endif /* CONFIG_AP */
2120
2121 #if defined(CONFIG_AP) || defined(HOSTAPD)
2122
2123 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2124                                  int ifidx)
2125 {
2126         struct nl_msg *msg;
2127
2128 #ifdef HOSTAPD
2129         /* stop listening for EAPOL on this interface */
2130         del_ifidx(drv, ifidx);
2131 #endif /* HOSTAPD */
2132
2133         msg = nlmsg_alloc();
2134         if (!msg)
2135                 goto nla_put_failure;
2136
2137         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2138                     0, NL80211_CMD_DEL_INTERFACE, 0);
2139         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2140
2141         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2142                 return;
2143  nla_put_failure:
2144         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2145                    ifidx);
2146 }
2147
2148
2149 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2150                                 const char *ifname, enum nl80211_iftype iftype,
2151                                 const u8 *addr)
2152 {
2153         struct nl_msg *msg, *flags = NULL;
2154         int ifidx;
2155         int ret = -ENOBUFS;
2156 #ifdef HOSTAPD
2157         struct ifreq ifreq;
2158         struct iwreq iwr;
2159 #endif /* HOSTAPD */
2160
2161         msg = nlmsg_alloc();
2162         if (!msg)
2163                 return -1;
2164
2165         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2166                     0, NL80211_CMD_NEW_INTERFACE, 0);
2167         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2168         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2169         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2170
2171         if (iftype == NL80211_IFTYPE_MONITOR) {
2172                 int err;
2173
2174                 flags = nlmsg_alloc();
2175                 if (!flags)
2176                         goto nla_put_failure;
2177
2178                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2179
2180                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2181
2182                 nlmsg_free(flags);
2183
2184                 if (err)
2185                         goto nla_put_failure;
2186         }
2187
2188         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2189         if (ret) {
2190  nla_put_failure:
2191                 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2192                            ifname);
2193                 return ret;
2194         }
2195
2196         ifidx = if_nametoindex(ifname);
2197
2198         if (ifidx <= 0)
2199                 return -1;
2200
2201 #ifdef HOSTAPD
2202         /* start listening for EAPOL on this interface */
2203         add_ifidx(drv, ifidx);
2204
2205         if (addr) {
2206                 switch (iftype) {
2207                 case NL80211_IFTYPE_AP:
2208                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
2209                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
2210                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2211
2212                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
2213                                 nl80211_remove_iface(drv, ifidx);
2214                                 return -1;
2215                         }
2216                         break;
2217                 case NL80211_IFTYPE_WDS:
2218                         memset(&iwr, 0, sizeof(iwr));
2219                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
2220                         iwr.u.addr.sa_family = ARPHRD_ETHER;
2221                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
2222                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
2223                                 return -1;
2224                         break;
2225                 default:
2226                         /* nothing */
2227                         break;
2228                 }
2229         }
2230 #endif /* HOSTAPD */
2231
2232         return ifidx;
2233 }
2234
2235 #endif /* CONFIG_AP || HOSTAPD */
2236
2237 #ifdef CONFIG_AP
2238
2239 void ap_tx_status(void *ctx, const u8 *addr,
2240                   const u8 *buf, size_t len, int ack);
2241 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2242 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2243                 struct hostapd_frame_info *fi);
2244 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2245
2246 #endif /* CONFIG_AP */
2247
2248 #if defined(CONFIG_AP) || defined(HOSTAPD)
2249
2250 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2251 {
2252         struct ieee80211_hdr *hdr;
2253         u16 fc, type, stype;
2254
2255         hdr = (struct ieee80211_hdr *) buf;
2256         fc = le_to_host16(hdr->frame_control);
2257
2258         type = WLAN_FC_GET_TYPE(fc);
2259         stype = WLAN_FC_GET_STYPE(fc);
2260
2261         switch (type) {
2262         case WLAN_FC_TYPE_MGMT:
2263                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2264                            ok ? "ACK" : "fail");
2265 #ifdef HOSTAPD
2266                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2267 #else /* HOSTAPD */
2268                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2269 #endif /* HOSTAPD */
2270                 break;
2271         case WLAN_FC_TYPE_CTRL:
2272                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2273                            ok ? "ACK" : "fail");
2274                 break;
2275         case WLAN_FC_TYPE_DATA:
2276 #ifdef HOSTAPD
2277                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2278 #else /* HOSTAPD */
2279                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2280 #endif /* HOSTAPD */
2281                 break;
2282         default:
2283                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2284                            type);
2285                 break;
2286         }
2287 }
2288
2289 #endif /* CONFIG_AP || HOSTAPD */
2290
2291 #ifdef CONFIG_AP
2292
2293 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2294                          u8 *buf, size_t len,
2295                          struct hostapd_frame_info *hfi,
2296                          enum ieee80211_msg_type msg_type)
2297 {
2298         struct ieee80211_hdr *hdr;
2299         u16 fc, type, stype;
2300         size_t data_len = len;
2301
2302         /*
2303          * PS-Poll frames are 16 bytes. All other frames are
2304          * 24 bytes or longer.
2305          */
2306         if (len < 16)
2307                 return;
2308
2309         hdr = (struct ieee80211_hdr *) buf;
2310         fc = le_to_host16(hdr->frame_control);
2311
2312         type = WLAN_FC_GET_TYPE(fc);
2313         stype = WLAN_FC_GET_STYPE(fc);
2314
2315         switch (type) {
2316         case WLAN_FC_TYPE_DATA:
2317                 if (len < 24)
2318                         return;
2319                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2320                 case WLAN_FC_TODS:
2321                         break;
2322                 case WLAN_FC_FROMDS:
2323                         break;
2324                 default:
2325                         /* discard */
2326                         return;
2327                 }
2328                 break;
2329         case WLAN_FC_TYPE_CTRL:
2330                 /* discard non-ps-poll frames */
2331                 if (stype != WLAN_FC_STYPE_PSPOLL)
2332                         return;
2333                 break;
2334         case WLAN_FC_TYPE_MGMT:
2335                 break;
2336         default:
2337                 /* discard */
2338                 return;
2339         }
2340
2341         switch (msg_type) {
2342         case ieee80211_msg_normal:
2343                 /* continue processing */
2344                 break;
2345         case ieee80211_msg_tx_callback_ack:
2346                 handle_tx_callback(drv->ctx, buf, data_len, 1);
2347                 return;
2348         case ieee80211_msg_tx_callback_fail:
2349                 handle_tx_callback(drv->ctx, buf, data_len, 0);
2350                 return;
2351         }
2352
2353         switch (type) {
2354         case WLAN_FC_TYPE_MGMT:
2355                 if (stype != WLAN_FC_STYPE_BEACON &&
2356                     stype != WLAN_FC_STYPE_PROBE_REQ)
2357                         wpa_printf(MSG_MSGDUMP, "MGMT");
2358                 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2359                 break;
2360         case WLAN_FC_TYPE_CTRL:
2361                 /* can only get here with PS-Poll frames */
2362                 wpa_printf(MSG_DEBUG, "CTRL");
2363                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2364                 break;
2365         case WLAN_FC_TYPE_DATA:
2366                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2367                 break;
2368         }
2369 }
2370
2371 #endif /* CONFIG_AP */
2372
2373 #if defined(CONFIG_AP) || defined(HOSTAPD)
2374
2375 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2376 {
2377         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2378         int len;
2379         unsigned char buf[3000];
2380         struct ieee80211_radiotap_iterator iter;
2381         int ret;
2382         struct hostapd_frame_info hfi;
2383         int injected = 0, failed = 0, msg_type, rxflags = 0;
2384
2385         len = recv(sock, buf, sizeof(buf), 0);
2386         if (len < 0) {
2387                 perror("recv");
2388                 return;
2389         }
2390
2391         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2392                 printf("received invalid radiotap frame\n");
2393                 return;
2394         }
2395
2396         memset(&hfi, 0, sizeof(hfi));
2397
2398         while (1) {
2399                 ret = ieee80211_radiotap_iterator_next(&iter);
2400                 if (ret == -ENOENT)
2401                         break;
2402                 if (ret) {
2403                         printf("received invalid radiotap frame (%d)\n", ret);
2404                         return;
2405                 }
2406                 switch (iter.this_arg_index) {
2407                 case IEEE80211_RADIOTAP_FLAGS:
2408                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2409                                 len -= 4;
2410                         break;
2411                 case IEEE80211_RADIOTAP_RX_FLAGS:
2412                         rxflags = 1;
2413                         break;
2414                 case IEEE80211_RADIOTAP_TX_FLAGS:
2415                         injected = 1;
2416                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2417                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2418                         break;
2419                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2420                         break;
2421                 case IEEE80211_RADIOTAP_CHANNEL:
2422                         /* TODO convert from freq/flags to channel number
2423                         hfi.channel = XXX;
2424                         hfi.phytype = XXX;
2425                          */
2426                         break;
2427                 case IEEE80211_RADIOTAP_RATE:
2428                         hfi.datarate = *iter.this_arg * 5;
2429                         break;
2430                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2431                         hfi.ssi_signal = *iter.this_arg;
2432                         break;
2433                 }
2434         }
2435
2436         if (rxflags && injected)
2437                 return;
2438
2439         if (!injected)
2440                 msg_type = ieee80211_msg_normal;
2441         else if (failed)
2442                 msg_type = ieee80211_msg_tx_callback_fail;
2443         else
2444                 msg_type = ieee80211_msg_tx_callback_ack;
2445
2446         handle_frame(drv, buf + iter.max_length,
2447                      len - iter.max_length, &hfi, msg_type);
2448 }
2449
2450
2451 /*
2452  * we post-process the filter code later and rewrite
2453  * this to the offset to the last instruction
2454  */
2455 #define PASS    0xFF
2456 #define FAIL    0xFE
2457
2458 static struct sock_filter msock_filter_insns[] = {
2459         /*
2460          * do a little-endian load of the radiotap length field
2461          */
2462         /* load lower byte into A */
2463         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2464         /* put it into X (== index register) */
2465         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2466         /* load upper byte into A */
2467         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2468         /* left-shift it by 8 */
2469         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2470         /* or with X */
2471         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2472         /* put result into X */
2473         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2474
2475         /*
2476          * Allow management frames through, this also gives us those
2477          * management frames that we sent ourselves with status
2478          */
2479         /* load the lower byte of the IEEE 802.11 frame control field */
2480         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2481         /* mask off frame type and version */
2482         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2483         /* accept frame if it's both 0, fall through otherwise */
2484         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2485
2486         /*
2487          * TODO: add a bit to radiotap RX flags that indicates
2488          * that the sending station is not associated, then
2489          * add a filter here that filters on our DA and that flag
2490          * to allow us to deauth frames to that bad station.
2491          *
2492          * Not a regression -- we didn't do it before either.
2493          */
2494
2495 #if 0
2496         /*
2497          * drop non-data frames, WDS frames
2498          */
2499         /* load the lower byte of the frame control field */
2500         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2501         /* mask off QoS bit */
2502         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2503         /* drop non-data frames */
2504         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2505         /* load the upper byte of the frame control field */
2506         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2507         /* mask off toDS/fromDS */
2508         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2509         /* drop WDS frames */
2510         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2511 #endif
2512
2513         /*
2514          * add header length to index
2515          */
2516         /* load the lower byte of the frame control field */
2517         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2518         /* mask off QoS bit */
2519         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2520         /* right shift it by 6 to give 0 or 2 */
2521         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2522         /* add data frame header length */
2523         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2524         /* add index, was start of 802.11 header */
2525         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2526         /* move to index, now start of LL header */
2527         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2528
2529         /*
2530          * Accept empty data frames, we use those for
2531          * polling activity.
2532          */
2533         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2534         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2535
2536         /*
2537          * Accept EAPOL frames
2538          */
2539         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2540         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2541         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2542         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2543
2544         /* keep these last two statements or change the code below */
2545         /* return 0 == "DROP" */
2546         BPF_STMT(BPF_RET | BPF_K, 0),
2547         /* return ~0 == "keep all" */
2548         BPF_STMT(BPF_RET | BPF_K, ~0),
2549 };
2550
2551 static struct sock_fprog msock_filter = {
2552         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2553         .filter = msock_filter_insns,
2554 };
2555
2556
2557 static int add_monitor_filter(int s)
2558 {
2559         int idx;
2560
2561         /* rewrite all PASS/FAIL jump offsets */
2562         for (idx = 0; idx < msock_filter.len; idx++) {
2563                 struct sock_filter *insn = &msock_filter_insns[idx];
2564
2565                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2566                         if (insn->code == (BPF_JMP|BPF_JA)) {
2567                                 if (insn->k == PASS)
2568                                         insn->k = msock_filter.len - idx - 2;
2569                                 else if (insn->k == FAIL)
2570                                         insn->k = msock_filter.len - idx - 3;
2571                         }
2572
2573                         if (insn->jt == PASS)
2574                                 insn->jt = msock_filter.len - idx - 2;
2575                         else if (insn->jt == FAIL)
2576                                 insn->jt = msock_filter.len - idx - 3;
2577
2578                         if (insn->jf == PASS)
2579                                 insn->jf = msock_filter.len - idx - 2;
2580                         else if (insn->jf == FAIL)
2581                                 insn->jf = msock_filter.len - idx - 3;
2582                 }
2583         }
2584
2585         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2586                        &msock_filter, sizeof(msock_filter))) {
2587                 perror("SO_ATTACH_FILTER");
2588                 return -1;
2589         }
2590
2591         return 0;
2592 }
2593
2594
2595 static int
2596 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2597 {
2598         char buf[IFNAMSIZ];
2599         struct sockaddr_ll ll;
2600         int optval;
2601         socklen_t optlen;
2602
2603         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2604         buf[IFNAMSIZ - 1] = '\0';
2605
2606         drv->monitor_ifidx =
2607                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2608
2609         if (drv->monitor_ifidx < 0)
2610                 return -1;
2611
2612         if (hostapd_set_iface_flags(drv, buf, 1))
2613                 goto error;
2614
2615         memset(&ll, 0, sizeof(ll));
2616         ll.sll_family = AF_PACKET;
2617         ll.sll_ifindex = drv->monitor_ifidx;
2618         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2619         if (drv->monitor_sock < 0) {
2620                 perror("socket[PF_PACKET,SOCK_RAW]");
2621                 goto error;
2622         }
2623
2624         if (add_monitor_filter(drv->monitor_sock)) {
2625                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2626                            "interface; do filtering in user space");
2627                 /* This works, but will cost in performance. */
2628         }
2629
2630         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2631                 perror("monitor socket bind");
2632                 goto error;
2633         }
2634
2635         optlen = sizeof(optval);
2636         optval = 20;
2637         if (setsockopt
2638             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2639                 perror("Failed to set socket priority");
2640                 goto error;
2641         }
2642
2643         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2644                                      drv, NULL)) {
2645                 printf("Could not register monitor read socket\n");
2646                 goto error;
2647         }
2648
2649         return 0;
2650  error:
2651         nl80211_remove_iface(drv, drv->monitor_ifidx);
2652         return -1;
2653 }
2654
2655 #endif /* CONFIG_AP || HOSTAPD */
2656
2657 #ifdef CONFIG_AP
2658
2659 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2660                                  struct wpa_driver_associate_params *params)
2661 {
2662         if (drv->monitor_ifidx < 0 &&
2663             nl80211_create_monitor_interface(drv))
2664                 return -1;
2665
2666         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2667             wpa_driver_nl80211_set_freq2(drv, params)) {
2668                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2669                 drv->monitor_ifidx = -1;
2670                 return -1;
2671         }
2672
2673         /* TODO: setup monitor interface (and add code somewhere to remove this
2674          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2675
2676         return 0;
2677 }
2678 #endif /* CONFIG_AP */
2679
2680
2681 static int wpa_driver_nl80211_associate(
2682         void *priv, struct wpa_driver_associate_params *params)
2683 {
2684         struct wpa_driver_nl80211_data *drv = priv;
2685         int ret = -1;
2686         struct nl_msg *msg;
2687
2688 #ifdef CONFIG_AP
2689         if (params->mode == 2)
2690                 return wpa_driver_nl80211_ap(drv, params);
2691 #endif /* CONFIG_AP */
2692
2693         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2694                                           params->drop_unencrypted);
2695
2696         drv->associated = 0;
2697
2698         msg = nlmsg_alloc();
2699         if (!msg)
2700                 return -1;
2701
2702         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2703                    drv->ifindex);
2704         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2705                     NL80211_CMD_ASSOCIATE, 0);
2706
2707         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2708         if (params->bssid) {
2709                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2710                            MAC2STR(params->bssid));
2711                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2712         }
2713         if (params->freq) {
2714                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2715                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2716         }
2717         if (params->ssid) {
2718                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2719                                   params->ssid, params->ssid_len);
2720                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2721                         params->ssid);
2722                 if (params->ssid_len > sizeof(drv->ssid))
2723                         goto nla_put_failure;
2724                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2725                 drv->ssid_len = params->ssid_len;
2726         }
2727         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
2728         if (params->wpa_ie)
2729                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2730                         params->wpa_ie);
2731
2732         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2733         msg = NULL;
2734         if (ret) {
2735                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2736                            "(%s)", ret, strerror(-ret));
2737                 goto nla_put_failure;
2738         }
2739         ret = 0;
2740         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2741                    "successfully");
2742
2743 nla_put_failure:
2744         nlmsg_free(msg);
2745         return ret;
2746 }
2747
2748
2749 /**
2750  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2751  * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2752  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2753  * Returns: 0 on success, -1 on failure
2754  */
2755 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2756                                        int mode)
2757 {
2758         int ret = -1;
2759         struct nl_msg *msg;
2760         int nlmode;
2761
2762         switch (mode) {
2763         case 0:
2764                 nlmode = NL80211_IFTYPE_STATION;
2765                 break;
2766         case 1:
2767                 nlmode = NL80211_IFTYPE_ADHOC;
2768                 break;
2769         case 2:
2770                 nlmode = NL80211_IFTYPE_AP;
2771                 break;
2772         default:
2773                 return -1;
2774         }
2775
2776         msg = nlmsg_alloc();
2777         if (!msg)
2778                 return -1;
2779
2780         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2781                     0, NL80211_CMD_SET_INTERFACE, 0);
2782         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2783         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2784
2785         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2786         if (!ret)
2787                 return 0;
2788         else
2789                 goto try_again;
2790
2791 nla_put_failure:
2792         wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2793                    ret, strerror(-ret));
2794         return -1;
2795
2796 try_again:
2797         /* mac80211 doesn't allow mode changes while the device is up, so
2798          * take the device down, try to set the mode again, and bring the
2799          * device back up.
2800          */
2801         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2802                 /* Try to set the mode again while the interface is down */
2803                 msg = nlmsg_alloc();
2804                 if (!msg)
2805                         return -1;
2806
2807                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2808                             0, NL80211_CMD_SET_INTERFACE, 0);
2809                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2810                 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2811                 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2812                 if (ret) {
2813                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
2814                                    "mode(try_again): %d (%s)",
2815                                    drv->ifname, ret, strerror(-ret));
2816                 }
2817
2818                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2819                         ret = -1;
2820         }
2821
2822         return ret;
2823 }
2824
2825
2826 static int wpa_driver_nl80211_get_capa(void *priv,
2827                                        struct wpa_driver_capa *capa)
2828 {
2829         struct wpa_driver_nl80211_data *drv = priv;
2830         if (!drv->has_capability)
2831                 return -1;
2832         os_memcpy(capa, &drv->capa, sizeof(*capa));
2833         return 0;
2834 }
2835
2836
2837 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2838 {
2839         struct wpa_driver_nl80211_data *drv = priv;
2840
2841         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2842                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2843         drv->operstate = state;
2844         return wpa_driver_nl80211_send_oper_ifla(
2845                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2846 }
2847
2848
2849 #ifdef HOSTAPD
2850
2851 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2852
2853 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2854 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2855
2856
2857 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2858                                  const char *iface)
2859 {
2860         struct i802_bss *bss = &drv->bss;
2861         while (bss) {
2862                 if (os_strncmp(iface, bss->ifname, IFNAMSIZ) == 0)
2863                         return bss;
2864                 bss = bss->next;
2865         }
2866         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%s) failed", iface);
2867         return NULL;
2868 }
2869
2870
2871 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2872 {
2873         int i;
2874         int *old;
2875
2876         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
2877                    ifidx);
2878         for (i = 0; i < drv->num_if_indices; i++) {
2879                 if (drv->if_indices[i] == 0) {
2880                         drv->if_indices[i] = ifidx;
2881                         return;
2882                 }
2883         }
2884
2885         if (drv->if_indices != drv->default_if_indices)
2886                 old = drv->if_indices;
2887         else
2888                 old = NULL;
2889
2890         drv->if_indices = realloc(old,
2891                                   sizeof(int) * (drv->num_if_indices + 1));
2892         if (!drv->if_indices) {
2893                 if (!old)
2894                         drv->if_indices = drv->default_if_indices;
2895                 else
2896                         drv->if_indices = old;
2897                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
2898                            "interfaces");
2899                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
2900                 return;
2901         }
2902         drv->if_indices[drv->num_if_indices] = ifidx;
2903         drv->num_if_indices++;
2904 }
2905
2906
2907 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2908 {
2909         int i;
2910
2911         for (i = 0; i < drv->num_if_indices; i++) {
2912                 if (drv->if_indices[i] == ifidx) {
2913                         drv->if_indices[i] = 0;
2914                         break;
2915                 }
2916         }
2917 }
2918
2919
2920 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2921 {
2922         int i;
2923
2924         for (i = 0; i < drv->num_if_indices; i++)
2925                 if (drv->if_indices[i] == ifidx)
2926                         return 1;
2927
2928         return 0;
2929 }
2930
2931
2932 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
2933                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
2934                         size_t seq_len, const u8 *key, size_t key_len)
2935 {
2936         struct wpa_driver_nl80211_data *drv = priv;
2937         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
2938                            set_tx, seq, seq_len, key, key_len);
2939 }
2940
2941
2942 static inline int min_int(int a, int b)
2943 {
2944         if (a < b)
2945                 return a;
2946         return b;
2947 }
2948
2949
2950 static int get_key_handler(struct nl_msg *msg, void *arg)
2951 {
2952         struct nlattr *tb[NL80211_ATTR_MAX + 1];
2953         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2954
2955         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2956                   genlmsg_attrlen(gnlh, 0), NULL);
2957
2958         /*
2959          * TODO: validate the key index and mac address!
2960          * Otherwise, there's a race condition as soon as
2961          * the kernel starts sending key notifications.
2962          */
2963
2964         if (tb[NL80211_ATTR_KEY_SEQ])
2965                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
2966                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
2967         return NL_SKIP;
2968 }
2969
2970
2971 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
2972                            int idx, u8 *seq)
2973 {
2974         struct wpa_driver_nl80211_data *drv = priv;
2975         struct nl_msg *msg;
2976
2977         msg = nlmsg_alloc();
2978         if (!msg)
2979                 return -ENOMEM;
2980
2981         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2982                     0, NL80211_CMD_GET_KEY, 0);
2983
2984         if (addr)
2985                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2986         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
2987         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
2988
2989         memset(seq, 0, 6);
2990
2991         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
2992  nla_put_failure:
2993         return -ENOBUFS;
2994 }
2995
2996
2997 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
2998                               int mode)
2999 {
3000         struct wpa_driver_nl80211_data *drv = priv;
3001         struct nl_msg *msg;
3002         u8 rates[NL80211_MAX_SUPP_RATES];
3003         u8 rates_len = 0;
3004         int i;
3005
3006         msg = nlmsg_alloc();
3007         if (!msg)
3008                 return -ENOMEM;
3009
3010         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3011                     NL80211_CMD_SET_BSS, 0);
3012
3013         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3014                 rates[rates_len++] = basic_rates[i] / 5;
3015
3016         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3017
3018         /* TODO: multi-BSS support */
3019         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3020
3021         return send_and_recv_msgs(drv, msg, NULL, NULL);
3022  nla_put_failure:
3023         return -ENOBUFS;
3024 }
3025
3026
3027 /* Set kernel driver on given frequency (MHz) */
3028 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3029 {
3030         struct wpa_driver_nl80211_data *drv = priv;
3031         struct nl_msg *msg;
3032
3033         msg = nlmsg_alloc();
3034         if (!msg)
3035                 return -1;
3036
3037         drv->last_freq = freq->freq;
3038         drv->last_freq_ht = freq->ht_enabled;
3039
3040         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3041                     NL80211_CMD_SET_WIPHY, 0);
3042
3043         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3044         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq);
3045         if (freq->ht_enabled) {
3046                 switch (freq->sec_channel_offset) {
3047                 case -1:
3048                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3049                                     NL80211_CHAN_HT40MINUS);
3050                         break;
3051                 case 1:
3052                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3053                                     NL80211_CHAN_HT40PLUS);
3054                         break;
3055                 default:
3056                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3057                                     NL80211_CHAN_HT20);
3058                         break;
3059                 }
3060         }
3061
3062         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3063                 return 0;
3064  nla_put_failure:
3065         return -1;
3066 }
3067
3068
3069 static int i802_set_rts(void *priv, int rts)
3070 {
3071         struct wpa_driver_nl80211_data *drv = priv;
3072         struct iwreq iwr;
3073
3074         memset(&iwr, 0, sizeof(iwr));
3075         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3076         iwr.u.rts.value = rts;
3077         iwr.u.rts.fixed = 1;
3078
3079         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3080                 perror("ioctl[SIOCSIWRTS]");
3081                 return -1;
3082         }
3083
3084         return 0;
3085 }
3086
3087
3088 static int i802_set_frag(void *priv, int frag)
3089 {
3090         struct wpa_driver_nl80211_data *drv = priv;
3091         struct iwreq iwr;
3092
3093         memset(&iwr, 0, sizeof(iwr));
3094         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3095         iwr.u.frag.value = frag;
3096         iwr.u.frag.fixed = 1;
3097
3098         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3099                 perror("ioctl[SIOCSIWFRAG]");
3100                 return -1;
3101         }
3102
3103         return 0;
3104 }
3105
3106
3107 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3108 {
3109         struct wpa_driver_nl80211_data *drv = priv;
3110         struct iwreq iwr;
3111
3112         memset(&iwr, 0, sizeof(iwr));
3113         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3114
3115         iwr.u.retry.value = short_retry;
3116         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3117         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3118                 perror("ioctl[SIOCSIWRETRY(short)]");
3119                 return -1;
3120         }
3121
3122         iwr.u.retry.value = long_retry;
3123         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3124         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3125                 perror("ioctl[SIOCSIWRETRY(long)]");
3126                 return -1;
3127         }
3128
3129         return 0;
3130 }
3131
3132
3133 static int i802_flush(void *priv)
3134 {
3135         struct wpa_driver_nl80211_data *drv = priv;
3136         struct nl_msg *msg;
3137
3138         msg = nlmsg_alloc();
3139         if (!msg)
3140                 return -1;
3141
3142         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3143                     0, NL80211_CMD_DEL_STATION, 0);
3144
3145         /*
3146          * XXX: FIX! this needs to flush all VLANs too
3147          */
3148         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3149                     if_nametoindex(drv->ifname));
3150
3151         return send_and_recv_msgs(drv, msg, NULL, NULL);
3152  nla_put_failure:
3153         return -ENOBUFS;
3154 }
3155
3156
3157 static int get_sta_handler(struct nl_msg *msg, void *arg)
3158 {
3159         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3160         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3161         struct hostap_sta_driver_data *data = arg;
3162         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3163         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3164                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3165                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3166                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3167                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3168                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3169         };
3170
3171         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3172                   genlmsg_attrlen(gnlh, 0), NULL);
3173
3174         /*
3175          * TODO: validate the interface and mac address!
3176          * Otherwise, there's a race condition as soon as
3177          * the kernel starts sending station notifications.
3178          */
3179
3180         if (!tb[NL80211_ATTR_STA_INFO]) {
3181                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3182                 return NL_SKIP;
3183         }
3184         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3185                              tb[NL80211_ATTR_STA_INFO],
3186                              stats_policy)) {
3187                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3188                 return NL_SKIP;
3189         }
3190
3191         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3192                 data->inactive_msec =
3193                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3194         if (stats[NL80211_STA_INFO_RX_BYTES])
3195                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3196         if (stats[NL80211_STA_INFO_TX_BYTES])
3197                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3198         if (stats[NL80211_STA_INFO_RX_PACKETS])
3199                 data->rx_packets =
3200                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3201         if (stats[NL80211_STA_INFO_TX_PACKETS])
3202                 data->tx_packets =
3203                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3204
3205         return NL_SKIP;
3206 }
3207
3208 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3209                               const u8 *addr)
3210 {
3211         struct wpa_driver_nl80211_data *drv = priv;
3212         struct nl_msg *msg;
3213
3214         os_memset(data, 0, sizeof(*data));
3215         msg = nlmsg_alloc();
3216         if (!msg)
3217                 return -ENOMEM;
3218
3219         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3220                     0, NL80211_CMD_GET_STATION, 0);
3221
3222         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3223         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3224
3225         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3226  nla_put_failure:
3227         return -ENOBUFS;
3228 }
3229
3230
3231 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3232                            size_t data_len, int encrypt, const u8 *own_addr)
3233 {
3234         struct wpa_driver_nl80211_data *drv = priv;
3235         struct ieee80211_hdr *hdr;
3236         size_t len;
3237         u8 *pos;
3238         int res;
3239 #if 0 /* FIX */
3240         int qos = sta->flags & WLAN_STA_WME;
3241 #else
3242         int qos = 0;
3243 #endif
3244
3245         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3246                 data_len;
3247         hdr = os_zalloc(len);
3248         if (hdr == NULL) {
3249                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3250                        (unsigned long) len);
3251                 return -1;
3252         }
3253
3254         hdr->frame_control =
3255                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3256         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3257         if (encrypt)
3258                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3259 #if 0 /* To be enabled if qos determination is added above */
3260         if (qos) {
3261                 hdr->frame_control |=
3262                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3263         }
3264 #endif
3265
3266         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3267         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3268         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3269         pos = (u8 *) (hdr + 1);
3270
3271 #if 0 /* To be enabled if qos determination is added above */
3272         if (qos) {
3273                 /* add an empty QoS header if needed */
3274                 pos[0] = 0;
3275                 pos[1] = 0;
3276                 pos += 2;
3277         }
3278 #endif
3279
3280         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3281         pos += sizeof(rfc1042_header);
3282         WPA_PUT_BE16(pos, ETH_P_PAE);
3283         pos += 2;
3284         memcpy(pos, data, data_len);
3285
3286         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3287         if (res < 0) {
3288                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3289                            "failed: %d (%s)",
3290                            (unsigned long) len, errno, strerror(errno));
3291         }
3292         free(hdr);
3293
3294         return res;
3295 }
3296
3297
3298 static int i802_sta_add(const char *ifname, void *priv,
3299                         struct hostapd_sta_add_params *params)
3300 {
3301         struct wpa_driver_nl80211_data *drv = priv;
3302         struct nl_msg *msg;
3303         int ret = -ENOBUFS;
3304
3305         msg = nlmsg_alloc();
3306         if (!msg)
3307                 return -ENOMEM;
3308
3309         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3310                     0, NL80211_CMD_NEW_STATION, 0);
3311
3312         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3313                     if_nametoindex(drv->ifname));
3314         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3315         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3316         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3317                 params->supp_rates);
3318         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3319                     params->listen_interval);
3320
3321 #ifdef CONFIG_IEEE80211N
3322         if (params->ht_capabilities) {
3323                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3324                         params->ht_capabilities->length,
3325                         &params->ht_capabilities->data);
3326         }
3327 #endif /* CONFIG_IEEE80211N */
3328
3329         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3330         if (ret)
3331                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3332                            "result: %d (%s)", ret, strerror(-ret));
3333         if (ret == -EEXIST)
3334                 ret = 0;
3335  nla_put_failure:
3336         return ret;
3337 }
3338
3339
3340 static int i802_sta_remove(void *priv, const u8 *addr)
3341 {
3342         struct wpa_driver_nl80211_data *drv = priv;
3343         struct nl_msg *msg;
3344         int ret;
3345
3346         msg = nlmsg_alloc();
3347         if (!msg)
3348                 return -ENOMEM;
3349
3350         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3351                     0, NL80211_CMD_DEL_STATION, 0);
3352
3353         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3354                     if_nametoindex(drv->ifname));
3355         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3356
3357         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3358         if (ret == -ENOENT)
3359                 return 0;
3360         return ret;
3361  nla_put_failure:
3362         return -ENOBUFS;
3363 }
3364
3365
3366 static int i802_sta_set_flags(void *priv, const u8 *addr,
3367                               int total_flags, int flags_or, int flags_and)
3368 {
3369         struct wpa_driver_nl80211_data *drv = priv;
3370         struct nl_msg *msg, *flags = NULL;
3371
3372         msg = nlmsg_alloc();
3373         if (!msg)
3374                 return -ENOMEM;
3375
3376         flags = nlmsg_alloc();
3377         if (!flags) {
3378                 nlmsg_free(msg);
3379                 return -ENOMEM;
3380         }
3381
3382         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3383                     0, NL80211_CMD_SET_STATION, 0);
3384
3385         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3386                     if_nametoindex(drv->ifname));
3387         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3388
3389         if (total_flags & WLAN_STA_AUTHORIZED)
3390                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3391
3392         if (total_flags & WLAN_STA_WMM)
3393                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3394
3395         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3396                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3397
3398         if (total_flags & WLAN_STA_MFP)
3399                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3400
3401         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3402                 goto nla_put_failure;
3403
3404         nlmsg_free(flags);
3405
3406         return send_and_recv_msgs(drv, msg, NULL, NULL);
3407  nla_put_failure:
3408         nlmsg_free(flags);
3409         return -ENOBUFS;
3410 }
3411
3412
3413 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3414                                     int cw_min, int cw_max, int burst_time)
3415 {
3416         struct wpa_driver_nl80211_data *drv = priv;
3417         struct nl_msg *msg;
3418         struct nlattr *txq, *params;
3419
3420         msg = nlmsg_alloc();
3421         if (!msg)
3422                 return -1;
3423
3424         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3425                     0, NL80211_CMD_SET_WIPHY, 0);
3426
3427         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3428
3429         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3430         if (!txq)
3431                 goto nla_put_failure;
3432
3433         /* We are only sending parameters for a single TXQ at a time */
3434         params = nla_nest_start(msg, 1);
3435         if (!params)
3436                 goto nla_put_failure;
3437
3438         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3439         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3440          * 32 usec, so need to convert the value here. */
3441         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3442         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3443         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3444         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3445
3446         nla_nest_end(msg, params);
3447
3448         nla_nest_end(msg, txq);
3449
3450         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3451                 return 0;
3452  nla_put_failure:
3453         return -1;
3454 }
3455
3456
3457 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3458 {
3459         struct wpa_driver_nl80211_data *drv = priv;
3460         int ifidx;
3461         struct i802_bss *bss;
3462
3463         bss = os_zalloc(sizeof(*bss));
3464         if (bss == NULL)
3465                 return -1;
3466         os_strlcpy(bss->ifname, ifname, IFNAMSIZ);
3467
3468         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3469         if (ifidx < 0) {
3470                 os_free(bss);
3471                 return -1;
3472         }
3473         if (hostapd_set_iface_flags(priv, ifname, 1)) {
3474                 nl80211_remove_iface(priv, ifidx);
3475                 os_free(bss);
3476                 return -1;
3477         }
3478         bss->next = drv->bss.next;
3479         drv->bss.next = bss;
3480         return 0;
3481 }
3482
3483
3484 static int i802_bss_remove(void *priv, const char *ifname)
3485 {
3486         struct wpa_driver_nl80211_data *drv = priv;
3487         struct i802_bss *bss, *prev;
3488         nl80211_remove_iface(priv, if_nametoindex(ifname));
3489         prev = &drv->bss;
3490         bss = drv->bss.next;
3491         while (bss) {
3492                 if (os_strncmp(ifname, bss->ifname, IFNAMSIZ) == 0) {
3493                         prev->next = bss->next;
3494                         os_free(bss);
3495                         break;
3496                 }
3497                 prev = bss;
3498                 bss = bss->next;
3499         }
3500         return 0;
3501 }
3502
3503
3504 static int i802_set_beacon(const char *iface, void *priv,
3505                            const u8 *head, size_t head_len,
3506                            const u8 *tail, size_t tail_len, int dtim_period)
3507 {
3508         struct wpa_driver_nl80211_data *drv = priv;
3509         struct nl_msg *msg;
3510         u8 cmd = NL80211_CMD_NEW_BEACON;
3511         int ret;
3512         struct i802_bss *bss;
3513
3514         bss = get_bss(drv, iface);
3515         if (bss == NULL)
3516                 return -ENOENT;
3517
3518         msg = nlmsg_alloc();
3519         if (!msg)
3520                 return -ENOMEM;
3521
3522         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (iface=%s beacon_set=%d)",
3523                    iface, bss->beacon_set);
3524         if (bss->beacon_set)
3525                 cmd = NL80211_CMD_SET_BEACON;
3526
3527         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3528                     0, cmd, 0);
3529         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
3530         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
3531         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3532         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
3533         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
3534
3535         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3536         if (!ret)
3537                 bss->beacon_set = 1;
3538         return ret;
3539  nla_put_failure:
3540         return -ENOBUFS;
3541 }
3542
3543
3544 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3545 {
3546         struct nl_msg *msg;
3547
3548         msg = nlmsg_alloc();
3549         if (!msg)
3550                 return -ENOMEM;
3551
3552         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3553                     0, NL80211_CMD_DEL_BEACON, 0);
3554         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3555
3556         return send_and_recv_msgs(drv, msg, NULL, NULL);
3557  nla_put_failure:
3558         return -ENOBUFS;
3559 }
3560
3561
3562 static int i802_set_beacon_int(void *priv, int value)
3563 {
3564         struct wpa_driver_nl80211_data *drv = priv;
3565         struct nl_msg *msg;
3566
3567         drv->beacon_int = value;
3568
3569         if (!drv->bss.beacon_set)
3570                 return 0;
3571
3572         msg = nlmsg_alloc();
3573         if (!msg)
3574                 return -ENOMEM;
3575
3576         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
3577                    "(beacon_set=%d)", value, drv->bss.beacon_set);
3578         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3579                     0, NL80211_CMD_SET_BEACON, 0);
3580         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3581
3582         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
3583
3584         return send_and_recv_msgs(drv, msg, NULL, NULL);
3585  nla_put_failure:
3586         return -ENOBUFS;
3587 }
3588
3589
3590 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3591 {
3592         struct wpa_driver_nl80211_data *drv = priv;
3593         struct nl_msg *msg;
3594
3595         msg = nlmsg_alloc();
3596         if (!msg)
3597                 return -ENOMEM;
3598
3599         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3600                     NL80211_CMD_SET_BSS, 0);
3601
3602         if (cts >= 0)
3603                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3604         if (preamble >= 0)
3605                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3606         if (slot >= 0)
3607                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3608
3609         /* TODO: multi-BSS support */
3610         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3611
3612         return send_and_recv_msgs(drv, msg, NULL, NULL);
3613  nla_put_failure:
3614         return -ENOBUFS;
3615 }
3616
3617
3618 static int i802_set_cts_protect(void *priv, int value)
3619 {
3620         return i802_set_bss(priv, value, -1, -1);
3621 }
3622
3623
3624 static int i802_set_preamble(void *priv, int value)
3625 {
3626         return i802_set_bss(priv, -1, value, -1);
3627 }
3628
3629
3630 static int i802_set_short_slot_time(void *priv, int value)
3631 {
3632         return i802_set_bss(priv, -1, -1, value);
3633 }
3634
3635
3636 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3637 {
3638         switch (type) {
3639         case HOSTAPD_IF_VLAN:
3640                 return NL80211_IFTYPE_AP_VLAN;
3641         case HOSTAPD_IF_WDS:
3642                 return NL80211_IFTYPE_WDS;
3643         }
3644         return -1;
3645 }
3646
3647
3648 static int i802_if_add(const char *iface, void *priv,
3649                        enum hostapd_driver_if_type type, char *ifname,
3650                        const u8 *addr)
3651 {
3652         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3653                 return -1;
3654         return 0;
3655 }
3656
3657
3658 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3659                           char *ifname, const u8 *addr)
3660 {
3661         /* unused at the moment */
3662         return -1;
3663 }
3664
3665
3666 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3667                           const char *ifname, const u8 *addr)
3668 {
3669         nl80211_remove_iface(priv, if_nametoindex(ifname));
3670         return 0;
3671 }
3672
3673
3674 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3675                              const char *ifname, int vlan_id)
3676 {
3677         struct wpa_driver_nl80211_data *drv = priv;
3678         struct nl_msg *msg;
3679
3680         msg = nlmsg_alloc();
3681         if (!msg)
3682                 return -ENOMEM;
3683
3684         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3685                     0, NL80211_CMD_SET_STATION, 0);
3686
3687         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3688                     if_nametoindex(drv->ifname));
3689         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3690         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3691                     if_nametoindex(ifname));
3692
3693         return send_and_recv_msgs(drv, msg, NULL, NULL);
3694  nla_put_failure:
3695         return -ENOBUFS;
3696 }
3697
3698
3699 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3700                          u8 *buf, size_t len,
3701                          struct hostapd_frame_info *hfi,
3702                          enum ieee80211_msg_type msg_type)
3703 {
3704         struct hostapd_iface *iface = drv->hapd->iface;
3705         struct ieee80211_hdr *hdr;
3706         u16 fc, type, stype;
3707         size_t data_len = len;
3708         struct hostapd_data *hapd = NULL;
3709         int broadcast_bssid = 0;
3710         size_t i;
3711         u8 *bssid;
3712
3713         /*
3714          * PS-Poll frames are 16 bytes. All other frames are
3715          * 24 bytes or longer.
3716          */
3717         if (len < 16)
3718                 return;
3719
3720         hdr = (struct ieee80211_hdr *) buf;
3721         fc = le_to_host16(hdr->frame_control);
3722
3723         type = WLAN_FC_GET_TYPE(fc);
3724         stype = WLAN_FC_GET_STYPE(fc);
3725
3726         switch (type) {
3727         case WLAN_FC_TYPE_DATA:
3728                 if (len < 24)
3729                         return;
3730                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
3731                 case WLAN_FC_TODS:
3732                         bssid = hdr->addr1;
3733                         break;
3734                 case WLAN_FC_FROMDS:
3735                         bssid = hdr->addr2;
3736                         break;
3737                 default:
3738                         /* discard */
3739                         return;
3740                 }
3741                 break;
3742         case WLAN_FC_TYPE_CTRL:
3743                 /* discard non-ps-poll frames */
3744                 if (stype != WLAN_FC_STYPE_PSPOLL)
3745                         return;
3746                 bssid = hdr->addr1;
3747                 break;
3748         case WLAN_FC_TYPE_MGMT:
3749                 bssid = hdr->addr3;
3750                 break;
3751         default:
3752                 /* discard */
3753                 return;
3754         }
3755
3756         /* find interface frame belongs to */
3757         for (i = 0; i < iface->num_bss; i++) {
3758                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
3759                         hapd = iface->bss[i];
3760                         break;
3761                 }
3762         }
3763
3764         if (hapd == NULL) {
3765                 hapd = iface->bss[0];
3766
3767                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
3768                     bssid[2] != 0xff || bssid[3] != 0xff ||
3769                     bssid[4] != 0xff || bssid[5] != 0xff) {
3770                         /*
3771                          * Unknown BSSID - drop frame if this is not from
3772                          * passive scanning or a beacon (at least ProbeReq
3773                          * frames to other APs may be allowed through RX
3774                          * filtering in the wlan hw/driver)
3775                          */
3776                         if ((type != WLAN_FC_TYPE_MGMT ||
3777                              stype != WLAN_FC_STYPE_BEACON))
3778                                 return;
3779                 } else
3780                         broadcast_bssid = 1;
3781         }
3782
3783         switch (msg_type) {
3784         case ieee80211_msg_normal:
3785                 /* continue processing */
3786                 break;
3787         case ieee80211_msg_tx_callback_ack:
3788                 handle_tx_callback(hapd, buf, data_len, 1);
3789                 return;
3790         case ieee80211_msg_tx_callback_fail:
3791                 handle_tx_callback(hapd, buf, data_len, 0);
3792                 return;
3793         }
3794
3795         switch (type) {
3796         case WLAN_FC_TYPE_MGMT:
3797                 if (stype != WLAN_FC_STYPE_BEACON &&
3798                     stype != WLAN_FC_STYPE_PROBE_REQ)
3799                         wpa_printf(MSG_MSGDUMP, "MGMT");
3800                 if (broadcast_bssid) {
3801                         for (i = 0; i < iface->num_bss; i++)
3802                                 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
3803                                                 stype, hfi);
3804                 } else
3805                         hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
3806                 break;
3807         case WLAN_FC_TYPE_CTRL:
3808                 /* can only get here with PS-Poll frames */
3809                 wpa_printf(MSG_DEBUG, "CTRL");
3810                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3811                 break;
3812         case WLAN_FC_TYPE_DATA:
3813                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3814                 break;
3815         }
3816 }
3817
3818
3819 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3820 {
3821         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3822         struct sockaddr_ll lladdr;
3823         unsigned char buf[3000];
3824         int len;
3825         socklen_t fromlen = sizeof(lladdr);
3826
3827         len = recvfrom(sock, buf, sizeof(buf), 0,
3828                        (struct sockaddr *)&lladdr, &fromlen);
3829         if (len < 0) {
3830                 perror("recv");
3831                 return;
3832         }
3833
3834         if (have_ifidx(drv, lladdr.sll_ifindex)) {
3835                 struct hostapd_data *hapd;
3836                 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3837                 if (!hapd)
3838                         return;
3839                 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3840         }
3841 }
3842
3843
3844 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
3845                             int mode)
3846 {
3847         struct nl_msg *msg;
3848         int ret = -ENOBUFS;
3849
3850         msg = nlmsg_alloc();
3851         if (!msg)
3852                 return -ENOMEM;
3853
3854         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3855                     0, NL80211_CMD_SET_INTERFACE, 0);
3856         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3857                     if_nametoindex(ifname));
3858         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3859
3860         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3861         if (!ret)
3862                 return 0;
3863  nla_put_failure:
3864         wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
3865                    "mode.", ifname);
3866         return ret;
3867 }
3868
3869
3870 #ifdef CONFIG_IEEE80211N
3871 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
3872                               int freq, u8 *ie, size_t ie_len)
3873 {
3874         struct ieee802_11_elems elems;
3875         int ht, pri_chan = 0, sec_chan = 0;
3876         struct ieee80211_ht_operation *oper;
3877         struct hostapd_neighbor_bss *nnei;
3878
3879         ieee802_11_parse_elems(ie, ie_len, &elems, 0);
3880         ht = elems.ht_capabilities || elems.ht_operation;
3881         if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
3882                 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
3883                 pri_chan = oper->control_chan;
3884                 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
3885                         if (oper->ht_param &
3886                             HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
3887                                 sec_chan = pri_chan + 4;
3888                         else if (oper->ht_param &
3889                             HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
3890                                 sec_chan = pri_chan - 4;
3891                 }
3892         }
3893
3894         wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
3895                    " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
3896                    MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
3897
3898         nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
3899                           sizeof(struct hostapd_neighbor_bss));
3900         if (nnei == NULL)
3901                 return;
3902         drv->neighbors = nnei;
3903         nnei = &nnei[drv->num_neighbors];
3904         os_memcpy(nnei->bssid, bssid, ETH_ALEN);
3905         nnei->freq = freq;
3906         nnei->ht = !!ht;
3907         nnei->pri_chan = pri_chan;
3908         nnei->sec_chan = sec_chan;
3909         drv->num_neighbors++;
3910 }
3911
3912
3913 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
3914 {
3915         int divi = 1000000, i;
3916
3917         if (iwe->u.freq.e == 0) {
3918                 /*
3919                  * Some drivers do not report frequency, but a channel.
3920                  * Try to map this to frequency by assuming they are using
3921                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
3922                  * frequency if the driver sends both frequency and channel,
3923                  * since the driver may be sending an A-band channel that we
3924                  * don't handle here.
3925                  */
3926
3927                 if (*freq)
3928                         return 0;
3929
3930                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
3931                         *freq = 2407 + 5 * iwe->u.freq.m;
3932                         return 0;
3933                 } else if (iwe->u.freq.m == 14) {
3934                         *freq = 2484;
3935                         return 0;
3936                 }
3937         }
3938
3939         if (iwe->u.freq.e > 6) {
3940                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
3941                            "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
3942                 return -1;
3943         }
3944
3945         for (i = 0; i < iwe->u.freq.e; i++)
3946                 divi /= 10;
3947         *freq = iwe->u.freq.m / divi;
3948         return 0;
3949 }
3950
3951
3952 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
3953                            size_t len)
3954 {
3955         size_t ap_num = 0;
3956         int first;
3957         struct iw_event iwe_buf, *iwe = &iwe_buf;
3958         char *pos, *end, *custom;
3959         u8 bssid[ETH_ALEN];
3960         int freq = 0;
3961         u8 *ie = NULL;
3962         size_t ie_len = 0;
3963
3964         ap_num = 0;
3965         first = 1;
3966
3967         pos = (char *) res_buf;
3968         end = (char *) res_buf + len;
3969
3970         while (pos + IW_EV_LCP_LEN <= end) {
3971                 /* Event data may be unaligned, so make a local, aligned copy
3972                  * before processing. */
3973                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
3974                 if (iwe->len <= IW_EV_LCP_LEN)
3975                         break;
3976
3977                 custom = pos + IW_EV_POINT_LEN;
3978                 if (iwe->cmd == IWEVGENIE) {
3979                         /* WE-19 removed the pointer from struct iw_point */
3980                         char *dpos = (char *) &iwe_buf.u.data.length;
3981                         int dlen = dpos - (char *) &iwe_buf;
3982                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
3983                                   sizeof(struct iw_event) - dlen);
3984                 } else {
3985                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
3986                         custom += IW_EV_POINT_OFF;
3987                 }
3988
3989                 switch (iwe->cmd) {
3990                 case SIOCGIWAP:
3991                         if (!first)
3992                                 i802_add_neighbor(drv, bssid, freq, ie,
3993                                                   ie_len);
3994                         first = 0;
3995                         os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
3996                         freq = 0;
3997                         ie = NULL;
3998                         ie_len = 0;
3999                         break;
4000                 case SIOCGIWFREQ:
4001                         i802_get_scan_freq(iwe, &freq);
4002                         break;
4003                 case IWEVGENIE:
4004                         if (custom + iwe->u.data.length > end) {
4005                                 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
4006                                 return -1;
4007                         }
4008                         ie = (u8 *) custom;
4009                         ie_len = iwe->u.data.length;
4010                         break;
4011                 }
4012
4013                 pos += iwe->len;
4014         }
4015
4016         if (!first)
4017                 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
4018
4019         return 0;
4020 }
4021
4022
4023 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
4024 {
4025         struct iwreq iwr;
4026         u8 *res_buf;
4027         size_t res_buf_len;
4028         int res;
4029
4030         res_buf_len = IW_SCAN_MAX_DATA;
4031         for (;;) {
4032                 res_buf = os_malloc(res_buf_len);
4033                 if (res_buf == NULL)
4034                         return -1;
4035                 os_memset(&iwr, 0, sizeof(iwr));
4036                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4037                 iwr.u.data.pointer = res_buf;
4038                 iwr.u.data.length = res_buf_len;
4039
4040                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
4041                         break;
4042
4043                 if (errno == E2BIG && res_buf_len < 65535) {
4044                         os_free(res_buf);
4045                         res_buf = NULL;
4046                         res_buf_len *= 2;
4047                         if (res_buf_len > 65535)
4048                                 res_buf_len = 65535; /* 16-bit length field */
4049                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
4050                                    "trying larger buffer (%lu bytes)",
4051                                    (unsigned long) res_buf_len);
4052                 } else {
4053                         perror("ioctl[SIOCGIWSCAN]");
4054                         os_free(res_buf);
4055                         return -1;
4056                 }
4057         }
4058
4059         if (iwr.u.data.length > res_buf_len) {
4060                 os_free(res_buf);
4061                 return -1;
4062         }
4063
4064         res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
4065         os_free(res_buf);
4066
4067         return res;
4068 }
4069
4070
4071 static int i802_is_event_wireless_scan_complete(char *data, int len)
4072 {
4073         struct iw_event iwe_buf, *iwe = &iwe_buf;
4074         char *pos, *end;
4075
4076         pos = data;
4077         end = data + len;
4078
4079         while (pos + IW_EV_LCP_LEN <= end) {
4080                 /* Event data may be unaligned, so make a local, aligned copy
4081                  * before processing. */
4082                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4083                 if (iwe->cmd == SIOCGIWSCAN)
4084                         return 1;
4085
4086                 pos += iwe->len;
4087         }
4088
4089         return 0;
4090 }
4091
4092
4093 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4094 {
4095         struct ifinfomsg *ifi;
4096         int attrlen, _nlmsg_len, rta_len;
4097         struct rtattr *attr;
4098
4099         if (len < (int) sizeof(*ifi))
4100                 return 0;
4101
4102         ifi = NLMSG_DATA(h);
4103
4104         if (ifindex != ifi->ifi_index)
4105                 return 0; /* event for foreign ifindex */
4106
4107         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4108
4109         attrlen = h->nlmsg_len - _nlmsg_len;
4110         if (attrlen < 0)
4111                 return 0;
4112
4113         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4114
4115         rta_len = RTA_ALIGN(sizeof(struct rtattr));
4116         while (RTA_OK(attr, attrlen)) {
4117                 if (attr->rta_type == IFLA_WIRELESS &&
4118                     i802_is_event_wireless_scan_complete(
4119                             ((char *) attr) + rta_len,
4120                             attr->rta_len - rta_len))
4121                         return 1;
4122                 attr = RTA_NEXT(attr, attrlen);
4123         }
4124
4125         return 0;
4126 }
4127
4128
4129 static int i802_is_scan_complete(int s, int ifindex)
4130 {
4131         char buf[1024];
4132         int left;
4133         struct nlmsghdr *h;
4134
4135         left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4136         if (left < 0) {
4137                 perror("recv(netlink)");
4138                 return 0;
4139         }
4140
4141         h = (struct nlmsghdr *) buf;
4142         while (left >= (int) sizeof(*h)) {
4143                 int len, plen;
4144
4145                 len = h->nlmsg_len;
4146                 plen = len - sizeof(*h);
4147                 if (len > left || plen < 0) {
4148                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4149                                    "len=%d left=%d plen=%d",
4150                                    len, left, plen);
4151                         break;
4152                 }
4153
4154                 switch (h->nlmsg_type) {
4155                 case RTM_NEWLINK:
4156                         if (i802_is_rtm_scan_complete(ifindex, h, plen))
4157                                 return 1;
4158                         break;
4159                 }
4160
4161                 len = NLMSG_ALIGN(len);
4162                 left -= len;
4163                 h = (struct nlmsghdr *) ((char *) h + len);
4164         }
4165
4166         return 0;
4167 }
4168
4169
4170 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4171 {
4172         struct iwreq iwr;
4173         int s, res, ifindex;
4174         struct sockaddr_nl local;
4175         time_t now, end;
4176         fd_set rfds;
4177         struct timeval tv;
4178
4179         wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4180                    "starting HT 20/40 MHz BSS");
4181
4182         /* Request a new scan */
4183         /* TODO: would be enough to scan the selected band */
4184         os_memset(&iwr, 0, sizeof(iwr));
4185         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4186         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4187                 perror("ioctl[SIOCSIWSCAN]");
4188                 return -1;
4189         }
4190
4191         ifindex = if_nametoindex(drv->ifname);
4192
4193         /* Wait for scan completion event or timeout */
4194         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4195         if (s < 0) {
4196                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4197                 return -1;
4198         }
4199
4200         os_memset(&local, 0, sizeof(local));
4201         local.nl_family = AF_NETLINK;
4202         local.nl_groups = RTMGRP_LINK;
4203         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
4204                 perror("bind(netlink)");
4205                 close(s);
4206                 return -1;
4207         }
4208
4209         time(&end);
4210         end += 30; /* Wait at most 30 seconds for scan results */
4211         for (;;) {
4212                 time(&now);
4213                 tv.tv_sec = end > now ? end - now : 0;
4214                 tv.tv_usec = 0;
4215                 FD_ZERO(&rfds);
4216                 FD_SET(s, &rfds);
4217                 res = select(s + 1, &rfds, NULL, NULL, &tv);
4218                 if (res < 0) {
4219                         perror("select");
4220                         /* Assume results are ready after 10 seconds wait */
4221                         os_sleep(10, 0);
4222                         break;
4223                 } else if (res) {
4224                         if (i802_is_scan_complete(s, ifindex)) {
4225                                 wpa_printf(MSG_DEBUG, "nl80211: Scan "
4226                                            "completed");
4227                                 break;
4228                         }
4229                 } else {
4230                         wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
4231                         /* Assume results are ready to be read now */
4232                         break;
4233                 }
4234         }
4235
4236         close(s);
4237
4238         return i802_get_ht_scan_res(drv);
4239 }
4240 #endif /* CONFIG_IEEE80211N */
4241
4242
4243 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
4244 {
4245         struct ifreq ifr;
4246         int ret;
4247
4248         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
4249         if (drv->ioctl_sock < 0) {
4250                 perror("socket[PF_INET,SOCK_DGRAM]");
4251                 return -1;
4252         }
4253
4254         /* start listening for EAPOL on the default AP interface */
4255         add_ifidx(drv, if_nametoindex(drv->ifname));
4256
4257         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4258                 return -1;
4259
4260         if (bssid) {
4261                 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
4262                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
4263                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
4264
4265                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
4266                         perror("ioctl(SIOCSIFHWADDR)");
4267                         return -1;
4268                 }
4269         }
4270
4271         /*
4272          * initialise generic netlink and nl80211
4273          */
4274         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
4275         if (!drv->nl_cb) {
4276                 printf("Failed to allocate netlink callbacks.\n");
4277                 return -1;
4278         }
4279
4280         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
4281         if (!drv->nl_handle) {
4282                 printf("Failed to allocate netlink handle.\n");
4283                 return -1;
4284         }
4285
4286         if (genl_connect(drv->nl_handle)) {
4287                 printf("Failed to connect to generic netlink.\n");
4288                 return -1;
4289         }
4290
4291 #ifdef CONFIG_LIBNL20
4292         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
4293                 printf("Failed to allocate generic netlink cache.\n");
4294                 return -1;
4295         }
4296 #else /* CONFIG_LIBNL20 */
4297         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
4298         if (!drv->nl_cache) {
4299                 printf("Failed to allocate generic netlink cache.\n");
4300                 return -1;
4301         }
4302 #endif /* CONFIG_LIBNL20 */
4303
4304         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
4305         if (!drv->nl80211) {
4306                 printf("nl80211 not found.\n");
4307                 return -1;
4308         }
4309
4310         ret = nl_get_multicast_id(drv, "nl80211", "scan");
4311         if (ret >= 0)
4312                 ret = nl_socket_add_membership(drv->nl_handle, ret);
4313         if (ret < 0) {
4314                 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4315                            "membership for scan events: %d (%s)",
4316                            ret, strerror(-ret));
4317         }
4318
4319         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
4320         if (ret >= 0)
4321                 ret = nl_socket_add_membership(drv->nl_handle, ret);
4322         if (ret < 0) {
4323                 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4324                            "membership for mlme events: %d (%s)",
4325                            ret, strerror(-ret));
4326         }
4327
4328         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
4329                                  wpa_driver_nl80211_event_receive, drv,
4330                                  drv->hapd);
4331
4332 #ifdef CONFIG_IEEE80211N
4333         if (drv->ht_40mhz_scan) {
4334                 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
4335                     || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
4336                     i802_ht_scan(drv) ||
4337                     hostapd_set_iface_flags(drv, drv->ifname, 0)) {
4338                         wpa_printf(MSG_ERROR, "Failed to scan channels for "
4339                                    "HT 40 MHz operations");
4340                         return -1;
4341                 }
4342         }
4343 #endif /* CONFIG_IEEE80211N */
4344
4345         /* Initialise a monitor interface */
4346         if (nl80211_create_monitor_interface(drv))
4347                 return -1;
4348
4349         if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
4350                 goto fail1;
4351
4352         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4353                 goto fail1;
4354
4355         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4356         if (drv->eapol_sock < 0) {
4357                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4358                 goto fail1;
4359         }
4360
4361         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4362         {
4363                 printf("Could not register read socket for eapol\n");
4364                 return -1;
4365         }
4366
4367         memset(&ifr, 0, sizeof(ifr));
4368         os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
4369         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
4370                 perror("ioctl(SIOCGIFHWADDR)");
4371                 goto fail1;
4372         }
4373
4374         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
4375                 printf("Invalid HW-addr family 0x%04x\n",
4376                        ifr.ifr_hwaddr.sa_family);
4377                 goto fail1;
4378         }
4379         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
4380
4381         return 0;
4382
4383 fail1:
4384         nl80211_remove_iface(drv, drv->monitor_ifidx);
4385         return -1;
4386 }
4387
4388
4389 static int i802_get_inact_sec(void *priv, const u8 *addr)
4390 {
4391         struct hostap_sta_driver_data data;
4392         int ret;
4393
4394         data.inactive_msec = (unsigned long) -1;
4395         ret = i802_read_sta_data(priv, &data, addr);
4396         if (ret || data.inactive_msec == (unsigned long) -1)
4397                 return -1;
4398         return data.inactive_msec / 1000;
4399 }
4400
4401
4402 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4403 {
4404 #if 0
4405         /* TODO */
4406 #endif
4407         return 0;
4408 }
4409
4410
4411 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
4412 {
4413         struct wpa_driver_nl80211_data *drv = priv;
4414         struct ieee80211_mgmt mgmt;
4415
4416         memset(&mgmt, 0, sizeof(mgmt));
4417         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4418                                           WLAN_FC_STYPE_DEAUTH);
4419         memcpy(mgmt.da, addr, ETH_ALEN);
4420         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4421         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4422         mgmt.u.deauth.reason_code = host_to_le16(reason);
4423         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4424                                             IEEE80211_HDRLEN +
4425                                             sizeof(mgmt.u.deauth));
4426 }
4427
4428
4429 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
4430 {
4431         struct wpa_driver_nl80211_data *drv = priv;
4432         struct ieee80211_mgmt mgmt;
4433
4434         memset(&mgmt, 0, sizeof(mgmt));
4435         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4436                                           WLAN_FC_STYPE_DISASSOC);
4437         memcpy(mgmt.da, addr, ETH_ALEN);
4438         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4439         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4440         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4441         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4442                                             IEEE80211_HDRLEN +
4443                                             sizeof(mgmt.u.disassoc));
4444 }
4445
4446
4447 static const struct hostapd_neighbor_bss *
4448 i802_get_neighbor_bss(void *priv, size_t *num)
4449 {
4450         struct wpa_driver_nl80211_data *drv = priv;
4451         *num = drv->num_neighbors;
4452         return drv->neighbors;
4453 }
4454
4455
4456 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
4457 {
4458         struct wpa_driver_nl80211_data *drv;
4459         size_t i;
4460
4461         drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
4462         if (drv == NULL) {
4463                 printf("Could not allocate memory for i802 driver data\n");
4464                 return NULL;
4465         }
4466
4467         drv->hapd = hapd;
4468         memcpy(drv->ifname, hapd->conf->iface, sizeof(drv->ifname));
4469         memcpy(drv->bss.ifname, hapd->conf->iface, sizeof(drv->bss.ifname));
4470         drv->ifindex = if_nametoindex(drv->ifname);
4471
4472         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4473         drv->if_indices = drv->default_if_indices;
4474         for (i = 0; i < hapd->iface->num_bss; i++) {
4475                 struct hostapd_data *bss = hapd->iface->bss[i];
4476                 if (bss->conf->bridge)
4477                         add_ifidx(drv, if_nametoindex(bss->conf->bridge));
4478         }
4479         drv->ht_40mhz_scan = hapd->iconf->secondary_channel != 0;
4480
4481         if (i802_init_sockets(drv, bssid))
4482                 goto failed;
4483
4484         return drv;
4485
4486 failed:
4487         free(drv);
4488         return NULL;
4489 }
4490
4491
4492 static void *i802_init(struct hostapd_data *hapd)
4493 {
4494         return i802_init_bssid(hapd, NULL);
4495 }
4496
4497
4498 static void i802_deinit(void *priv)
4499 {
4500         struct wpa_driver_nl80211_data *drv = priv;
4501         struct i802_bss *bss, *prev;
4502
4503         if (drv->last_freq_ht) {
4504                 /* Clear HT flags from the driver */
4505                 struct hostapd_freq_params freq;
4506                 os_memset(&freq, 0, sizeof(freq));
4507                 freq.freq = drv->last_freq;
4508                 i802_set_freq(priv, &freq);
4509         }
4510
4511         i802_del_beacon(drv);
4512
4513         /* remove monitor interface */
4514         nl80211_remove_iface(drv, drv->monitor_ifidx);
4515
4516         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
4517
4518         if (drv->monitor_sock >= 0) {
4519                 eloop_unregister_read_sock(drv->monitor_sock);
4520                 close(drv->monitor_sock);
4521         }
4522         if (drv->ioctl_sock >= 0)
4523                 close(drv->ioctl_sock);
4524         if (drv->eapol_sock >= 0) {
4525                 eloop_unregister_read_sock(drv->eapol_sock);
4526                 close(drv->eapol_sock);
4527         }
4528
4529         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
4530         genl_family_put(drv->nl80211);
4531         nl_cache_free(drv->nl_cache);
4532         nl_handle_destroy(drv->nl_handle);
4533         nl_cb_put(drv->nl_cb);
4534
4535         if (drv->if_indices != drv->default_if_indices)
4536                 free(drv->if_indices);
4537
4538         os_free(drv->neighbors);
4539
4540         bss = drv->bss.next;
4541         while (bss) {
4542                 prev = bss;
4543                 bss = bss->next;
4544                 os_free(bss);
4545         }
4546
4547         free(drv);
4548 }
4549
4550 #endif /* HOSTAPD */
4551
4552
4553 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4554         .name = "nl80211",
4555         .desc = "Linux nl80211/cfg80211",
4556         .get_bssid = wpa_driver_nl80211_get_bssid,
4557         .get_ssid = wpa_driver_nl80211_get_ssid,
4558         .set_key = wpa_driver_nl80211_set_key,
4559         .scan2 = wpa_driver_nl80211_scan,
4560         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4561         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4562         .disassociate = wpa_driver_nl80211_disassociate,
4563         .authenticate = wpa_driver_nl80211_authenticate,
4564         .associate = wpa_driver_nl80211_associate,
4565         .init = wpa_driver_nl80211_init,
4566         .deinit = wpa_driver_nl80211_deinit,
4567         .get_capa = wpa_driver_nl80211_get_capa,
4568         .set_operstate = wpa_driver_nl80211_set_operstate,
4569         .set_country = wpa_driver_nl80211_set_country,
4570 #ifdef CONFIG_AP
4571         .set_beacon = wpa_driver_nl80211_set_beacon,
4572         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4573         .send_mlme = wpa_driver_nl80211_send_mlme,
4574 #endif /* CONFIG_AP */
4575 #if defined(CONFIG_AP) || defined(HOSTAPD)
4576         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4577 #endif /* CONFIG_AP || HOSTAPD */
4578 #ifdef HOSTAPD
4579         .hapd_init = i802_init,
4580         .init_bssid = i802_init_bssid,
4581         .hapd_deinit = i802_deinit,
4582         .hapd_set_key = i802_set_key,
4583         .get_seqnum = i802_get_seqnum,
4584         .flush = i802_flush,
4585         .read_sta_data = i802_read_sta_data,
4586         .hapd_send_eapol = i802_send_eapol,
4587         .sta_set_flags = i802_sta_set_flags,
4588         .sta_deauth = i802_sta_deauth,
4589         .sta_disassoc = i802_sta_disassoc,
4590         .sta_remove = i802_sta_remove,
4591         .sta_add = i802_sta_add,
4592         .get_inact_sec = i802_get_inact_sec,
4593         .sta_clear_stats = i802_sta_clear_stats,
4594         .set_freq = i802_set_freq,
4595         .set_rts = i802_set_rts,
4596         .set_frag = i802_set_frag,
4597         .set_retry = i802_set_retry,
4598         .set_rate_sets = i802_set_rate_sets,
4599         .hapd_set_beacon = i802_set_beacon,
4600         .hapd_set_beacon_int = i802_set_beacon_int,
4601         .set_cts_protect = i802_set_cts_protect,
4602         .set_preamble = i802_set_preamble,
4603         .set_short_slot_time = i802_set_short_slot_time,
4604         .set_tx_queue_params = i802_set_tx_queue_params,
4605         .bss_add = i802_bss_add,
4606         .bss_remove = i802_bss_remove,
4607         .if_add = i802_if_add,
4608         .if_update = i802_if_update,
4609         .if_remove = i802_if_remove,
4610         .set_sta_vlan = i802_set_sta_vlan,
4611         .get_neighbor_bss = i802_get_neighbor_bss,
4612 #endif /* HOSTAPD */
4613 };