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 "../../hostapd/hostapd.h"
  52 #include "../../hostapd/sta_flags.h"
  53 #include "ieee802_11_common.h"
  54
  55 #ifdef CONFIG_LIBNL20
  56 /* libnl 2.0 compatibility code */
  57 #define nl_handle_alloc_cb nl_socket_alloc_cb
  58 #define nl_handle_destroy nl_socket_free
  59 #endif /* CONFIG_LIBNL20 */
  60
  61 #endif /* HOSTAPD */
  62
  63
  64 #ifndef IFF_LOWER_UP
  65 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  66 #endif
  67 #ifndef IFF_DORMANT
  68 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  69 #endif
  70
  71 #ifndef IF_OPER_DORMANT
  72 #define IF_OPER_DORMANT 5
  73 #endif
  74 #ifndef IF_OPER_UP
  75 #define IF_OPER_UP 6
  76 #endif
  77
  78 enum ieee80211_msg_type {
  79         ieee80211_msg_normal = 0,
  80         ieee80211_msg_tx_callback_ack = 1,
  81         ieee80211_msg_tx_callback_fail = 2,
  82 };
  83
  84 struct i802_bss {
  85         struct i802_bss *next;
  86         int ifindex;
  87         unsigned int beacon_set:1;
  88 };
  89
  90 struct wpa_driver_nl80211_data {
  91         void *ctx;
  92         int link_event_sock;
  93         int ioctl_sock; /* socket for ioctl() use */
  94         char ifname[IFNAMSIZ + 1];
  95         int ifindex;
  96         int if_removed;
  97         struct wpa_driver_capa capa;
  98         int has_capability;
  99
 100         int operstate;
 101
 102         int scan_complete_events;
 103
 104         struct nl_handle *nl_handle;
 105         struct nl_cache *nl_cache;
 106         struct nl_cb *nl_cb;
 107         struct genl_family *nl80211;
 108
 109         u8 bssid[ETH_ALEN];
 110         int associated;
 111         u8 ssid[32];
 112         size_t ssid_len;
 113
 114 #ifdef CONFIG_AP
 115         int beacon_int;
 116         unsigned int beacon_set:1;
 117         int monitor_sock;
 118         int monitor_ifidx;
 119 #endif /* CONFIG_AP */
 120
 121 #ifdef HOSTAPD
 122         struct hostapd_data *hapd;
 123
 124         int eapol_sock; /* socket for EAPOL frames */
 125         int monitor_sock; /* socket for monitor */
 126         int monitor_ifidx;
 127
 128         int default_if_indices[16];
 129         int *if_indices;
 130         int num_if_indices;
 131
 132         int beacon_int;
 133         struct i802_bss bss;
 134         unsigned int ht_40mhz_scan:1;
 135
 136         int last_freq;
 137         int last_freq_ht;
 138         struct hostapd_neighbor_bss *neighbors;
 139         size_t num_neighbors;
 140 #endif /* HOSTAPD */
 141 };
 142
 143
 144 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 145                                             void *timeout_ctx);
 146 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
 147                                        int mode);
 148 static int
 149 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 150
 151 #ifdef CONFIG_AP
 152 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 153                                  int ifidx);
 154 #endif /* CONFIG_AP */
 155
 156 #ifdef HOSTAPD
 157 static void handle_frame(struct wpa_driver_nl80211_data *drv,
 158                          u8 *buf, size_t len,
 159                          struct hostapd_frame_info *hfi,
 160                          enum ieee80211_msg_type msg_type);
 161 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 162 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 163 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 164                                  int ifindex);
 165 #endif /* HOSTAPD */
 166
 167
 168 /* nl80211 code */
 169 static int ack_handler(struct nl_msg *msg, void *arg)
 170 {
 171         int *err = arg;
 172         *err = 0;
 173         return NL_STOP;
 174 }
 175
 176 static int finish_handler(struct nl_msg *msg, void *arg)
 177 {
 178         int *ret = arg;
 179         *ret = 0;
 180         return NL_SKIP;
 181 }
 182
 183 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 184                          void *arg)
 185 {
 186         int *ret = arg;
 187         *ret = err->error;
 188         return NL_SKIP;
 189 }
 190
 191
 192 static int no_seq_check(struct nl_msg *msg, void *arg)
 193 {
 194         return NL_OK;
 195 }
 196
 197
 198 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 199                               struct nl_msg *msg,
 200                               int (*valid_handler)(struct nl_msg *, void *),
 201                               void *valid_data)
 202 {
 203         struct nl_cb *cb;
 204         int err = -ENOMEM;
 205
 206         cb = nl_cb_clone(drv->nl_cb);
 207         if (!cb)
 208                 goto out;
 209
 210         err = nl_send_auto_complete(drv->nl_handle, msg);
 211         if (err < 0)
 212                 goto out;
 213
 214         err = 1;
 215
 216         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 217         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 218         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 219
 220         if (valid_handler)
 221                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 222                           valid_handler, valid_data);
 223
 224         while (err > 0)
 225                 nl_recvmsgs(drv->nl_handle, cb);
 226  out:
 227         nl_cb_put(cb);
 228         nlmsg_free(msg);
 229         return err;
 230 }
 231
 232
 233 struct family_data {
 234         const char *group;
 235         int id;
 236 };
 237
 238
 239 static int family_handler(struct nl_msg *msg, void *arg)
 240 {
 241         struct family_data *res = arg;
 242         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 243         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 244         struct nlattr *mcgrp;
 245         int i;
 246
 247         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 248                   genlmsg_attrlen(gnlh, 0), NULL);
 249         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 250                 return NL_SKIP;
 251
 252         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 253                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 254                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 255                           nla_len(mcgrp), NULL);
 256                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 257                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 258                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 259                                res->group,
 260                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 261                         continue;
 262                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 263                 break;
 264         };
 265
 266         return NL_SKIP;
 267 }
 268
 269
 270 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 271                                const char *family, const char *group)
 272 {
 273         struct nl_msg *msg;
 274         int ret = -1;
 275         struct family_data res = { group, -ENOENT };
 276
 277         msg = nlmsg_alloc();
 278         if (!msg)
 279                 return -ENOMEM;
 280         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 281                     0, 0, CTRL_CMD_GETFAMILY, 0);
 282         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 283
 284         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 285         msg = NULL;
 286         if (ret == 0)
 287                 ret = res.id;
 288
 289 nla_put_failure:
 290         nlmsg_free(msg);
 291         return ret;
 292 }
 293
 294
 295 static int wpa_driver_nl80211_send_oper_ifla(
 296         struct wpa_driver_nl80211_data *drv,
 297         int linkmode, int operstate)
 298 {
 299         struct {
 300                 struct nlmsghdr hdr;
 301                 struct ifinfomsg ifinfo;
 302                 char opts[16];
 303         } req;
 304         struct rtattr *rta;
 305         static int nl_seq;
 306         ssize_t ret;
 307
 308         os_memset(&req, 0, sizeof(req));
 309
 310         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 311         req.hdr.nlmsg_type = RTM_SETLINK;
 312         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 313         req.hdr.nlmsg_seq = ++nl_seq;
 314         req.hdr.nlmsg_pid = 0;
 315
 316         req.ifinfo.ifi_family = AF_UNSPEC;
 317         req.ifinfo.ifi_type = 0;
 318         req.ifinfo.ifi_index = drv->ifindex;
 319         req.ifinfo.ifi_flags = 0;
 320         req.ifinfo.ifi_change = 0;
 321
 322         if (linkmode != -1) {
 323                 rta = (struct rtattr *)
 324                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 325                 rta->rta_type = IFLA_LINKMODE;
 326                 rta->rta_len = RTA_LENGTH(sizeof(char));
 327                 *((char *) RTA_DATA(rta)) = linkmode;
 328                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 329                         RTA_LENGTH(sizeof(char));
 330         }
 331         if (operstate != -1) {
 332                 rta = (struct rtattr *)
 333                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 334                 rta->rta_type = IFLA_OPERSTATE;
 335                 rta->rta_len = RTA_LENGTH(sizeof(char));
 336                 *((char *) RTA_DATA(rta)) = operstate;
 337                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 338                         RTA_LENGTH(sizeof(char));
 339         }
 340
 341         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 342                    linkmode, operstate);
 343
 344         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 345         if (ret < 0) {
 346                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 347                            "%s (assume operstate is not supported)",
 348                            strerror(errno));
 349         }
 350
 351         return ret < 0 ? -1 : 0;
 352 }
 353
 354
 355 static int wpa_driver_nl80211_set_auth_param(
 356         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 357 {
 358         struct iwreq iwr;
 359         int ret = 0;
 360
 361         os_memset(&iwr, 0, sizeof(iwr));
 362         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 363         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 364         iwr.u.param.value = value;
 365
 366         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 367                 if (errno != EOPNOTSUPP) {
 368                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 369                                    "value 0x%x) failed: %s)",
 370                                    idx, value, strerror(errno));
 371                 }
 372                 ret = errno == EOPNOTSUPP ? -2 : -1;
 373         }
 374
 375         return ret;
 376 }
 377
 378
 379 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 380 {
 381         struct wpa_driver_nl80211_data *drv = priv;
 382         if (!drv->associated)
 383                 return -1;
 384         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 385         return 0;
 386 }
 387
 388
 389 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 390 {
 391         struct wpa_driver_nl80211_data *drv = priv;
 392         if (!drv->associated)
 393                 return -1;
 394         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 395         return drv->ssid_len;
 396 }
 397
 398
 399 #ifndef HOSTAPD
 400 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 401                                           void *ctx, char *buf, size_t len,
 402                                           int del)
 403 {
 404         union wpa_event_data event;
 405
 406         os_memset(&event, 0, sizeof(event));
 407         if (len > sizeof(event.interface_status.ifname))
 408                 len = sizeof(event.interface_status.ifname) - 1;
 409         os_memcpy(event.interface_status.ifname, buf, len);
 410         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 411                 EVENT_INTERFACE_ADDED;
 412
 413         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 414                    del ? "DEL" : "NEW",
 415                    event.interface_status.ifname,
 416                    del ? "removed" : "added");
 417
 418         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 419                 if (del)
 420                         drv->if_removed = 1;
 421                 else
 422                         drv->if_removed = 0;
 423         }
 424
 425         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 426 }
 427
 428
 429 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 430                                          struct nlmsghdr *h)
 431 {
 432         struct ifinfomsg *ifi;
 433         int attrlen, _nlmsg_len, rta_len;
 434         struct rtattr *attr;
 435
 436         ifi = NLMSG_DATA(h);
 437
 438         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 439
 440         attrlen = h->nlmsg_len - _nlmsg_len;
 441         if (attrlen < 0)
 442                 return 0;
 443
 444         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 445
 446         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 447         while (RTA_OK(attr, attrlen)) {
 448                 if (attr->rta_type == IFLA_IFNAME) {
 449                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 450                             == 0)
 451                                 return 1;
 452                         else
 453                                 break;
 454                 }
 455                 attr = RTA_NEXT(attr, attrlen);
 456         }
 457
 458         return 0;
 459 }
 460
 461
 462 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 463                                           int ifindex, struct nlmsghdr *h)
 464 {
 465         if (drv->ifindex == ifindex)
 466                 return 1;
 467
 468         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 469                 drv->ifindex = if_nametoindex(drv->ifname);
 470                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 471                            "interface");
 472                 wpa_driver_nl80211_finish_drv_init(drv);
 473                 return 1;
 474         }
 475
 476         return 0;
 477 }
 478
 479
 480 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 481                                               void *ctx, struct nlmsghdr *h,
 482                                               size_t len)
 483 {
 484         struct ifinfomsg *ifi;
 485         int attrlen, _nlmsg_len, rta_len;
 486         struct rtattr * attr;
 487
 488         if (len < sizeof(*ifi))
 489                 return;
 490
 491         ifi = NLMSG_DATA(h);
 492
 493         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 494                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 495                            ifi->ifi_index);
 496                 return;
 497         }
 498
 499         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 500                    "(%s%s%s%s)",
 501                    drv->operstate, ifi->ifi_flags,
 502                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 503                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 504                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 505                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 506         /*
 507          * Some drivers send the association event before the operup event--in
 508          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 509          * fails. This will hit us when wpa_supplicant does not need to do
 510          * IEEE 802.1X authentication
 511          */
 512         if (drv->operstate == 1 &&
 513             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 514             !(ifi->ifi_flags & IFF_RUNNING))
 515                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 516
 517         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 518
 519         attrlen = h->nlmsg_len - _nlmsg_len;
 520         if (attrlen < 0)
 521                 return;
 522
 523         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 524
 525         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 526         while (RTA_OK(attr, attrlen)) {
 527                 if (attr->rta_type == IFLA_IFNAME) {
 528                         wpa_driver_nl80211_event_link(
 529                                 drv, ctx,
 530                                 ((char *) attr) + rta_len,
 531                                 attr->rta_len - rta_len, 0);
 532                 }
 533                 attr = RTA_NEXT(attr, attrlen);
 534         }
 535 }
 536
 537
 538 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 539                                               void *ctx, struct nlmsghdr *h,
 540                                               size_t len)
 541 {
 542         struct ifinfomsg *ifi;
 543         int attrlen, _nlmsg_len, rta_len;
 544         struct rtattr * attr;
 545
 546         if (len < sizeof(*ifi))
 547                 return;
 548
 549         ifi = NLMSG_DATA(h);
 550
 551         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 552
 553         attrlen = h->nlmsg_len - _nlmsg_len;
 554         if (attrlen < 0)
 555                 return;
 556
 557         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 558
 559         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 560         while (RTA_OK(attr, attrlen)) {
 561                 if (attr->rta_type == IFLA_IFNAME) {
 562                         wpa_driver_nl80211_event_link(
 563                                 drv, ctx,
 564                                 ((char *) attr) + rta_len,
 565                                 attr->rta_len - rta_len, 1);
 566                 }
 567                 attr = RTA_NEXT(attr, attrlen);
 568         }
 569 }
 570
 571
 572 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 573                                                   void *sock_ctx)
 574 {
 575         char buf[8192];
 576         int left;
 577         struct sockaddr_nl from;
 578         socklen_t fromlen;
 579         struct nlmsghdr *h;
 580         int max_events = 10;
 581
 582 try_again:
 583         fromlen = sizeof(from);
 584         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 585                         (struct sockaddr *) &from, &fromlen);
 586         if (left < 0) {
 587                 if (errno != EINTR && errno != EAGAIN)
 588                         perror("recvfrom(netlink)");
 589                 return;
 590         }
 591
 592         h = (struct nlmsghdr *) buf;
 593         while (left >= (int) sizeof(*h)) {
 594                 int len, plen;
 595
 596                 len = h->nlmsg_len;
 597                 plen = len - sizeof(*h);
 598                 if (len > left || plen < 0) {
 599                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 600                                    "len=%d left=%d plen=%d",
 601                                    len, left, plen);
 602                         break;
 603                 }
 604
 605                 switch (h->nlmsg_type) {
 606                 case RTM_NEWLINK:
 607                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 608                                                           h, plen);
 609                         break;
 610                 case RTM_DELLINK:
 611                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 612                                                           h, plen);
 613                         break;
 614                 }
 615
 616                 len = NLMSG_ALIGN(len);
 617                 left -= len;
 618                 h = (struct nlmsghdr *) ((char *) h + len);
 619         }
 620
 621         if (left > 0) {
 622                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 623                            "message", left);
 624         }
 625
 626         if (--max_events > 0) {
 627                 /*
 628                  * Try to receive all events in one eloop call in order to
 629                  * limit race condition on cases where AssocInfo event, Assoc
 630                  * event, and EAPOL frames are received more or less at the
 631                  * same time. We want to process the event messages first
 632                  * before starting EAPOL processing.
 633                  */
 634                 goto try_again;
 635         }
 636 }
 637
 638
 639 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 640                             const u8 *frame, size_t len)
 641 {
 642         const struct ieee80211_mgmt *mgmt;
 643         union wpa_event_data event;
 644
 645         mgmt = (const struct ieee80211_mgmt *) frame;
 646         if (len < 24 + sizeof(mgmt->u.auth)) {
 647                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 648                            "frame");
 649                 return;
 650         }
 651
 652         os_memset(&event, 0, sizeof(event));
 653         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 654         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 655         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 656         if (len > 24 + sizeof(mgmt->u.auth)) {
 657                 event.auth.ies = mgmt->u.auth.variable;
 658                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 659         }
 660
 661         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 662 }
 663
 664
 665 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 666                             const u8 *frame, size_t len)
 667 {
 668         const struct ieee80211_mgmt *mgmt;
 669         union wpa_event_data event;
 670         u16 status;
 671
 672         mgmt = (const struct ieee80211_mgmt *) frame;
 673         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 674                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 675                            "frame");
 676                 return;
 677         }
 678
 679         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 680         if (status != WLAN_STATUS_SUCCESS) {
 681                 os_memset(&event, 0, sizeof(event));
 682                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 683                         event.assoc_reject.resp_ies =
 684                                 (u8 *) mgmt->u.assoc_resp.variable;
 685                         event.assoc_reject.resp_ies_len =
 686                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 687                 }
 688                 event.assoc_reject.status_code = status;
 689
 690                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 691                 return;
 692         }
 693
 694         drv->associated = 1;
 695         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 696
 697         os_memset(&event, 0, sizeof(event));
 698         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 699                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 700                 event.assoc_info.resp_ies_len =
 701                         len - 24 - sizeof(mgmt->u.assoc_resp);
 702         }
 703
 704         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 705 }
 706
 707
 708 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 709                        enum nl80211_commands cmd, struct nlattr *frame)
 710 {
 711         if (frame == NULL) {
 712                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 713                            "data", cmd);
 714                 return;
 715         }
 716
 717         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 718         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 719                     nla_data(frame), nla_len(frame));
 720
 721         switch (cmd) {
 722         case NL80211_CMD_AUTHENTICATE:
 723                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 724                 break;
 725         case NL80211_CMD_ASSOCIATE:
 726                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 727                 break;
 728         case NL80211_CMD_DEAUTHENTICATE:
 729                 drv->associated = 0;
 730                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 731                 break;
 732         case NL80211_CMD_DISASSOCIATE:
 733                 drv->associated = 0;
 734                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 735                 break;
 736         default:
 737                 break;
 738         }
 739 }
 740
 741 #endif /* HOSTAPD */
 742
 743
 744 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 745                                            struct nlattr *tb[])
 746 {
 747 #ifdef HOSTAPD
 748         if (tb[NL80211_ATTR_MAC])
 749                 hostapd_michael_mic_failure(drv->hapd,
 750                                             nla_data(tb[NL80211_ATTR_MAC]));
 751 #else /* HOSTAPD */
 752         union wpa_event_data data;
 753
 754         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 755         os_memset(&data, 0, sizeof(data));
 756         if (tb[NL80211_ATTR_MAC]) {
 757                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 758                             nla_data(tb[NL80211_ATTR_MAC]),
 759                             nla_len(tb[NL80211_ATTR_MAC]));
 760         }
 761         if (tb[NL80211_ATTR_KEY_SEQ]) {
 762                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 763                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 764                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 765         }
 766         if (tb[NL80211_ATTR_KEY_TYPE]) {
 767                 enum nl80211_key_type key_type =
 768                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 769                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 770                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 771                         data.michael_mic_failure.unicast = 1;
 772         } else
 773                 data.michael_mic_failure.unicast = 1;
 774
 775         if (tb[NL80211_ATTR_KEY_IDX]) {
 776                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 777                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 778         }
 779
 780         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 781 #endif /* HOSTAPD */
 782 }
 783
 784
 785 static int process_event(struct nl_msg *msg, void *arg)
 786 {
 787         struct wpa_driver_nl80211_data *drv = arg;
 788         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 789         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 790
 791         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 792                   genlmsg_attrlen(gnlh, 0), NULL);
 793
 794         if (tb[NL80211_ATTR_IFINDEX]) {
 795                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 796                 if (ifindex != drv->ifindex) {
 797                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 798                                    " for foreign interface (ifindex %d)",
 799                                    gnlh->cmd, ifindex);
 800                         return NL_SKIP;
 801                 }
 802         }
 803
 804         switch (gnlh->cmd) {
 805 #ifndef HOSTAPD
 806         case NL80211_CMD_NEW_SCAN_RESULTS:
 807                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 808                 drv->scan_complete_events = 1;
 809                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 810                                      drv->ctx);
 811                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 812                 break;
 813         case NL80211_CMD_SCAN_ABORTED:
 814                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 815                 /*
 816                  * Need to indicate that scan results are available in order
 817                  * not to make wpa_supplicant stop its scanning.
 818                  */
 819                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 820                                      drv->ctx);
 821                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 822                 break;
 823         case NL80211_CMD_AUTHENTICATE:
 824         case NL80211_CMD_ASSOCIATE:
 825         case NL80211_CMD_DEAUTHENTICATE:
 826         case NL80211_CMD_DISASSOCIATE:
 827                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
 828                 break;
 829 #endif /* HOSTAPD */
 830         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 831                 mlme_event_michael_mic_failure(drv, tb);
 832                 break;
 833         default:
 834                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 835                            "(cmd=%d)", gnlh->cmd);
 836                 break;
 837         }
 838
 839         return NL_SKIP;
 840 }
 841
 842
 843 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 844                                              void *sock_ctx)
 845 {
 846         struct nl_cb *cb;
 847         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 848
 849         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 850
 851         cb = nl_cb_clone(drv->nl_cb);
 852         if (!cb)
 853                 return;
 854         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 855         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 856         nl_recvmsgs(drv->nl_handle, cb);
 857         nl_cb_put(cb);
 858 }
 859
 860
 861 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 862                                    const char *ifname, int dev_up)
 863 {
 864         struct ifreq ifr;
 865
 866         if (drv->ioctl_sock < 0)
 867                 return -1;
 868
 869         os_memset(&ifr, 0, sizeof(ifr));
 870         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 871
 872         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 873                 perror("ioctl[SIOCGIFFLAGS]");
 874                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 875                            ifname);
 876                 return -1;
 877         }
 878
 879         if (dev_up) {
 880                 if (ifr.ifr_flags & IFF_UP)
 881                         return 0;
 882                 ifr.ifr_flags |= IFF_UP;
 883         } else {
 884                 if (!(ifr.ifr_flags & IFF_UP))
 885                         return 0;
 886                 ifr.ifr_flags &= ~IFF_UP;
 887         }
 888
 889         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 890                 perror("ioctl[SIOCSIFFLAGS]");
 891                 return -1;
 892         }
 893
 894         return 0;
 895 }
 896
 897
 898 /**
 899  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 900  * @priv: driver_nl80211 private data
 901  * @alpha2_arg: country to which to switch to
 902  * Returns: 0 on success, -1 on failure
 903  *
 904  * This asks nl80211 to set the regulatory domain for given
 905  * country ISO / IEC alpha2.
 906  */
 907 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 908 {
 909         struct wpa_driver_nl80211_data *drv = priv;
 910         char alpha2[3];
 911         struct nl_msg *msg;
 912
 913         msg = nlmsg_alloc();
 914         if (!msg)
 915                 return -ENOMEM;
 916
 917         alpha2[0] = alpha2_arg[0];
 918         alpha2[1] = alpha2_arg[1];
 919         alpha2[2] = '\0';
 920
 921         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 922                     0, NL80211_CMD_REQ_SET_REG, 0);
 923
 924         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 925         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 926                 return -EINVAL;
 927         return 0;
 928 nla_put_failure:
 929         return -EINVAL;
 930 }
 931
 932
 933 struct wiphy_info_data {
 934         int max_scan_ssids;
 935         int ap_supported;
 936 };
 937
 938
 939 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 940 {
 941         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 942         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 943         struct wiphy_info_data *info = arg;
 944
 945         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 946                   genlmsg_attrlen(gnlh, 0), NULL);
 947
 948         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 949                 info->max_scan_ssids =
 950                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 951
 952         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 953                 struct nlattr *nl_mode;
 954                 int i;
 955                 nla_for_each_nested(nl_mode,
 956                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 957                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 958                                 info->ap_supported = 1;
 959                                 break;
 960                         }
 961                 }
 962         }
 963
 964         return NL_SKIP;
 965 }
 966
 967
 968 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 969                                        struct wiphy_info_data *info)
 970 {
 971         struct nl_msg *msg;
 972
 973         os_memset(info, 0, sizeof(*info));
 974         msg = nlmsg_alloc();
 975         if (!msg)
 976                 return -1;
 977
 978         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 979                     0, NL80211_CMD_GET_WIPHY, 0);
 980
 981         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 982
 983         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
 984                 return 0;
 985         msg = NULL;
 986 nla_put_failure:
 987         nlmsg_free(msg);
 988         return -1;
 989 }
 990
 991
 992 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
 993 {
 994         struct wiphy_info_data info;
 995         if (wpa_driver_nl80211_get_info(drv, &info))
 996                 return;
 997         drv->has_capability = 1;
 998         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
 999         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1000                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1001                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1002                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1003         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1004                 WPA_DRIVER_CAPA_ENC_WEP104 |
1005                 WPA_DRIVER_CAPA_ENC_TKIP |
1006                 WPA_DRIVER_CAPA_ENC_CCMP;
1007
1008         drv->capa.max_scan_ssids = info.max_scan_ssids;
1009         if (info.ap_supported)
1010                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1011 }
1012
1013
1014 /**
1015  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1016  * @ctx: context to be used when calling wpa_supplicant functions,
1017  * e.g., wpa_supplicant_event()
1018  * @ifname: interface name, e.g., wlan0
1019  * Returns: Pointer to private data, %NULL on failure
1020  */
1021 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1022 {
1023         int s, ret;
1024         struct sockaddr_nl local;
1025         struct wpa_driver_nl80211_data *drv;
1026
1027         drv = os_zalloc(sizeof(*drv));
1028         if (drv == NULL)
1029                 return NULL;
1030         drv->ctx = ctx;
1031         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1032 #ifdef CONFIG_AP
1033         drv->monitor_ifidx = -1;
1034         drv->monitor_sock = -1;
1035 #endif /* CONFIG_AP */
1036
1037         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1038         if (drv->nl_cb == NULL) {
1039                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1040                            "callbacks");
1041                 goto err1;
1042         }
1043
1044         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1045         if (drv->nl_handle == NULL) {
1046                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1047                            "callbacks");
1048                 goto err2;
1049         }
1050
1051         if (genl_connect(drv->nl_handle)) {
1052                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1053                            "netlink");
1054                 goto err3;
1055         }
1056
1057         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1058         if (drv->nl_cache == NULL) {
1059                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1060                            "netlink cache");
1061                 goto err3;
1062         }
1063
1064         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1065         if (drv->nl80211 == NULL) {
1066                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1067                            "found");
1068                 goto err4;
1069         }
1070
1071         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1072         if (ret >= 0)
1073                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1074         if (ret < 0) {
1075                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1076                            "membership for scan events: %d (%s)",
1077                            ret, strerror(-ret));
1078                 goto err4;
1079         }
1080
1081         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1082         if (ret >= 0)
1083                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1084         if (ret < 0) {
1085                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1086                            "membership for mlme events: %d (%s)",
1087                            ret, strerror(-ret));
1088                 goto err4;
1089         }
1090         drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1091
1092         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1093                                  wpa_driver_nl80211_event_receive, drv, ctx);
1094
1095         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1096         if (drv->ioctl_sock < 0) {
1097                 perror("socket(PF_INET,SOCK_DGRAM)");
1098                 goto err5;
1099         }
1100
1101         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1102         if (s < 0) {
1103                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1104                 goto err6;
1105         }
1106
1107         os_memset(&local, 0, sizeof(local));
1108         local.nl_family = AF_NETLINK;
1109         local.nl_groups = RTMGRP_LINK;
1110         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1111                 perror("bind(netlink)");
1112                 close(s);
1113                 goto err6;
1114         }
1115
1116 #ifndef HOSTAPD
1117         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1118                                  ctx);
1119 #endif /* HOSTAPD */
1120         drv->link_event_sock = s;
1121
1122         if (wpa_driver_nl80211_finish_drv_init(drv))
1123                 goto err7;
1124
1125         return drv;
1126
1127 err7:
1128         eloop_unregister_read_sock(drv->link_event_sock);
1129         close(drv->link_event_sock);
1130 err6:
1131         close(drv->ioctl_sock);
1132 err5:
1133         genl_family_put(drv->nl80211);
1134 err4:
1135         nl_cache_free(drv->nl_cache);
1136 err3:
1137         nl_handle_destroy(drv->nl_handle);
1138 err2:
1139         nl_cb_put(drv->nl_cb);
1140 err1:
1141         os_free(drv);
1142         return NULL;
1143 }
1144
1145
1146 static int
1147 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1148 {
1149         drv->ifindex = if_nametoindex(drv->ifname);
1150
1151         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1152                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1153                            "use managed mode");
1154         }
1155
1156         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1157                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1158                            "UP", drv->ifname);
1159                 return -1;
1160         }
1161
1162         wpa_driver_nl80211_capa(drv);
1163
1164         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1165
1166         return 0;
1167 }
1168
1169
1170 /**
1171  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1172  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1173  *
1174  * Shut down driver interface and processing of driver events. Free
1175  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1176  */
1177 static void wpa_driver_nl80211_deinit(void *priv)
1178 {
1179         struct wpa_driver_nl80211_data *drv = priv;
1180
1181 #ifdef CONFIG_AP
1182         if (drv->monitor_ifidx >= 0)
1183                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1184         if (drv->monitor_sock >= 0) {
1185                 eloop_unregister_read_sock(drv->monitor_sock);
1186                 close(drv->monitor_sock);
1187         }
1188 #endif /* CONFIG_AP */
1189
1190         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1191
1192         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1193
1194         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1195
1196         eloop_unregister_read_sock(drv->link_event_sock);
1197
1198         hostapd_set_iface_flags(drv, drv->ifname, 0);
1199         wpa_driver_nl80211_set_mode(drv, 0);
1200
1201         close(drv->link_event_sock);
1202         close(drv->ioctl_sock);
1203
1204         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1205         genl_family_put(drv->nl80211);
1206         nl_cache_free(drv->nl_cache);
1207         nl_handle_destroy(drv->nl_handle);
1208         nl_cb_put(drv->nl_cb);
1209
1210         os_free(drv);
1211 }
1212
1213
1214 /**
1215  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1216  * @eloop_ctx: Unused
1217  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1218  *
1219  * This function can be used as registered timeout when starting a scan to
1220  * generate a scan completed event if the driver does not report this.
1221  */
1222 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1223 {
1224         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1225 #ifndef HOSTAPD
1226         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1227 #endif /* HOSTAPD */
1228 }
1229
1230
1231 /**
1232  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1233  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1234  * @params: Scan parameters
1235  * Returns: 0 on success, -1 on failure
1236  */
1237 static int wpa_driver_nl80211_scan(void *priv,
1238                                    struct wpa_driver_scan_params *params)
1239 {
1240         struct wpa_driver_nl80211_data *drv = priv;
1241         int ret = 0, timeout;
1242         struct nl_msg *msg, *ssids, *freqs;
1243         size_t i;
1244
1245         msg = nlmsg_alloc();
1246         ssids = nlmsg_alloc();
1247         freqs = nlmsg_alloc();
1248         if (!msg || !ssids || !freqs) {
1249                 nlmsg_free(msg);
1250                 nlmsg_free(ssids);
1251                 nlmsg_free(freqs);
1252                 return -1;
1253         }
1254
1255         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1256                     NL80211_CMD_TRIGGER_SCAN, 0);
1257
1258         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1259
1260         for (i = 0; i < params->num_ssids; i++) {
1261                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1262                         params->ssids[i].ssid);
1263         }
1264         if (params->num_ssids)
1265                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1266
1267         if (params->extra_ies) {
1268                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1269                         params->extra_ies);
1270         }
1271
1272         if (params->freqs) {
1273                 for (i = 0; params->freqs[i]; i++)
1274                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1275                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1276         }
1277
1278         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1279         msg = NULL;
1280         if (ret) {
1281                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1282                            "(%s)", ret, strerror(-ret));
1283                 goto nla_put_failure;
1284         }
1285
1286         /* Not all drivers generate "scan completed" wireless event, so try to
1287          * read results after a timeout. */
1288         timeout = 10;
1289         if (drv->scan_complete_events) {
1290                 /*
1291                  * The driver seems to deliver events to notify when scan is
1292                  * complete, so use longer timeout to avoid race conditions
1293                  * with scanning and following association request.
1294                  */
1295                 timeout = 30;
1296         }
1297         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1298                    "seconds", ret, timeout);
1299         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1300         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1301                                drv, drv->ctx);
1302
1303 nla_put_failure:
1304         nlmsg_free(ssids);
1305         nlmsg_free(msg);
1306         nlmsg_free(freqs);
1307         return ret;
1308 }
1309
1310
1311 static int bss_info_handler(struct nl_msg *msg, void *arg)
1312 {
1313         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1314         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1315         struct nlattr *bss[NL80211_BSS_MAX + 1];
1316         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1317                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1318                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1319                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1320                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1321                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1322                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1323                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1324                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1325         };
1326         struct wpa_scan_results *res = arg;
1327         struct wpa_scan_res **tmp;
1328         struct wpa_scan_res *r;
1329         const u8 *ie;
1330         size_t ie_len;
1331
1332         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1333                   genlmsg_attrlen(gnlh, 0), NULL);
1334         if (!tb[NL80211_ATTR_BSS])
1335                 return NL_SKIP;
1336         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1337                              bss_policy))
1338                 return NL_SKIP;
1339         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1340                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1341                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1342         } else {
1343                 ie = NULL;
1344                 ie_len = 0;
1345         }
1346
1347         r = os_zalloc(sizeof(*r) + ie_len);
1348         if (r == NULL)
1349                 return NL_SKIP;
1350         if (bss[NL80211_BSS_BSSID])
1351                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1352                           ETH_ALEN);
1353         if (bss[NL80211_BSS_FREQUENCY])
1354                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1355         if (bss[NL80211_BSS_BEACON_INTERVAL])
1356                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1357         if (bss[NL80211_BSS_CAPABILITY])
1358                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1359         r->flags |= WPA_SCAN_NOISE_INVALID;
1360         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1361                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1362                 r->level /= 100; /* mBm to dBm */
1363                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1364         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1365                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1366                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1367         } else
1368                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1369         if (bss[NL80211_BSS_TSF])
1370                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1371         r->ie_len = ie_len;
1372         if (ie)
1373                 os_memcpy(r + 1, ie, ie_len);
1374
1375         tmp = os_realloc(res->res,
1376                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1377         if (tmp == NULL) {
1378                 os_free(r);
1379                 return NL_SKIP;
1380         }
1381         tmp[res->num++] = r;
1382         res->res = tmp;
1383
1384         return NL_SKIP;
1385 }
1386
1387
1388 /**
1389  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1390  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1391  * Returns: Scan results on success, -1 on failure
1392  */
1393 static struct wpa_scan_results *
1394 wpa_driver_nl80211_get_scan_results(void *priv)
1395 {
1396         struct wpa_driver_nl80211_data *drv = priv;
1397         struct nl_msg *msg;
1398         struct wpa_scan_results *res;
1399         int ret;
1400
1401         res = os_zalloc(sizeof(*res));
1402         if (res == NULL)
1403                 return 0;
1404         msg = nlmsg_alloc();
1405         if (!msg)
1406                 goto nla_put_failure;
1407
1408         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1409                     NL80211_CMD_GET_SCAN, 0);
1410         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1411
1412         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1413         msg = NULL;
1414         if (ret == 0) {
1415                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1416                            (unsigned long) res->num);
1417                 return res;
1418         }
1419         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1420                    "(%s)", ret, strerror(-ret));
1421 nla_put_failure:
1422         nlmsg_free(msg);
1423         wpa_scan_results_free(res);
1424         return NULL;
1425 }
1426
1427
1428 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1429                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1430                        const u8 *seq, size_t seq_len,
1431                        const u8 *key, size_t key_len)
1432 {
1433         struct nl_msg *msg;
1434         int ret;
1435
1436         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1437                    "set_tx=%d seq_len=%lu key_len=%lu",
1438                    __func__, ifindex, alg, addr, key_idx, set_tx,
1439                    (unsigned long) seq_len, (unsigned long) key_len);
1440
1441         msg = nlmsg_alloc();
1442         if (!msg)
1443                 return -ENOMEM;
1444
1445         if (alg == WPA_ALG_NONE) {
1446                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1447                             0, NL80211_CMD_DEL_KEY, 0);
1448         } else {
1449                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1450                             0, NL80211_CMD_NEW_KEY, 0);
1451                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1452                 switch (alg) {
1453                 case WPA_ALG_WEP:
1454                         if (key_len == 5)
1455                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1456                                             0x000FAC01);
1457                         else
1458                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1459                                             0x000FAC05);
1460                         break;
1461                 case WPA_ALG_TKIP:
1462                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1463                         break;
1464                 case WPA_ALG_CCMP:
1465                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1466                         break;
1467                 case WPA_ALG_IGTK:
1468                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1469                         break;
1470                 default:
1471                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1472                                    "algorithm %d", __func__, alg);
1473                         nlmsg_free(msg);
1474                         return -1;
1475                 }
1476         }
1477
1478         if (seq)
1479                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1480
1481         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1482         {
1483                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1484                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1485         }
1486         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1487         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1488
1489         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1490         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1491                 ret = 0;
1492         if (ret)
1493                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1494                            ret, strerror(-ret));
1495
1496         /*
1497          * If we failed or don't need to set the default TX key (below),
1498          * we're done here.
1499          */
1500         if (ret || !set_tx || alg == WPA_ALG_NONE)
1501                 return ret;
1502 #ifdef HOSTAPD /* FIX: is this needed? */
1503         if (addr)
1504                 return ret;
1505 #endif /* HOSTAPD */
1506
1507         msg = nlmsg_alloc();
1508         if (!msg)
1509                 return -ENOMEM;
1510
1511         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1512                     0, NL80211_CMD_SET_KEY, 0);
1513         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1514         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1515         if (alg == WPA_ALG_IGTK)
1516                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1517         else
1518                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1519
1520         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1521         if (ret == -ENOENT)
1522                 ret = 0;
1523         if (ret)
1524                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1525                            "err=%d %s)", ret, strerror(-ret));
1526         return ret;
1527
1528 nla_put_failure:
1529         return -ENOBUFS;
1530 }
1531
1532
1533 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1534                                       const u8 *addr, int key_idx,
1535                                       int set_tx, const u8 *seq,
1536                                       size_t seq_len,
1537                                       const u8 *key, size_t key_len)
1538 {
1539         struct wpa_driver_nl80211_data *drv = priv;
1540         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1541                            seq_len, key, key_len);
1542 }
1543
1544
1545 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1546                                    const u8 *addr, int cmd, u16 reason_code)
1547 {
1548         int ret = -1;
1549         struct nl_msg *msg;
1550
1551         msg = nlmsg_alloc();
1552         if (!msg)
1553                 return -1;
1554
1555         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1556
1557         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1558         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1559         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1560
1561         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1562         msg = NULL;
1563         if (ret) {
1564                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1565                            "(%s)", ret, strerror(-ret));
1566                 goto nla_put_failure;
1567         }
1568         ret = 0;
1569
1570 nla_put_failure:
1571         nlmsg_free(msg);
1572         return ret;
1573 }
1574
1575
1576 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1577                                              int reason_code)
1578 {
1579         struct wpa_driver_nl80211_data *drv = priv;
1580         wpa_printf(MSG_DEBUG, "%s", __func__);
1581         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1582                                        reason_code);
1583 }
1584
1585
1586 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1587                                            int reason_code)
1588 {
1589         struct wpa_driver_nl80211_data *drv = priv;
1590         wpa_printf(MSG_DEBUG, "%s", __func__);
1591         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1592                                        reason_code);
1593 }
1594
1595
1596 static int wpa_driver_nl80211_authenticate(
1597         void *priv, struct wpa_driver_auth_params *params)
1598 {
1599         struct wpa_driver_nl80211_data *drv = priv;
1600         int ret = -1, i;
1601         struct nl_msg *msg;
1602         enum nl80211_auth_type type;
1603
1604         drv->associated = 0;
1605
1606         msg = nlmsg_alloc();
1607         if (!msg)
1608                 return -1;
1609
1610         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1611                    drv->ifindex);
1612
1613         for (i = 0; i < 4; i++) {
1614                 if (!params->wep_key[i])
1615                         continue;
1616                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1617                                            i == params->wep_tx_keyidx, NULL, 0,
1618                                            params->wep_key[i],
1619                                            params->wep_key_len[i]);
1620         }
1621
1622         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1623                     NL80211_CMD_AUTHENTICATE, 0);
1624
1625         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1626         if (params->bssid) {
1627                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1628                            MAC2STR(params->bssid));
1629                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1630         }
1631         if (params->freq) {
1632                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1633                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1634         }
1635         if (params->ssid) {
1636                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1637                                   params->ssid, params->ssid_len);
1638                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1639                         params->ssid);
1640         }
1641         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1642         if (params->ie)
1643                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1644         /*
1645          * TODO: if multiple auth_alg options enabled, try them one by one if
1646          * the AP rejects authentication due to unknown auth alg
1647          */
1648         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1649                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1650         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1651                 type = NL80211_AUTHTYPE_SHARED_KEY;
1652         else if (params->auth_alg & AUTH_ALG_LEAP)
1653                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1654         else if (params->auth_alg & AUTH_ALG_FT)
1655                 type = NL80211_AUTHTYPE_FT;
1656         else
1657                 goto nla_put_failure;
1658         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1659         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1660
1661         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1662         msg = NULL;
1663         if (ret) {
1664                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1665                            "(%s)", ret, strerror(-ret));
1666                 goto nla_put_failure;
1667         }
1668         ret = 0;
1669         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1670                    "successfully");
1671
1672 nla_put_failure:
1673         nlmsg_free(msg);
1674         return ret;
1675 }
1676
1677
1678 #if defined(CONFIG_AP) || defined(HOSTAPD)
1679
1680 struct phy_info_arg {
1681         u16 *num_modes;
1682         struct hostapd_hw_modes *modes;
1683 };
1684
1685 static int phy_info_handler(struct nl_msg *msg, void *arg)
1686 {
1687         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1688         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1689         struct phy_info_arg *phy_info = arg;
1690
1691         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1692
1693         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1694         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1695                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1696                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1697                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1698                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1699                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1700                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1701         };
1702
1703         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1704         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1705                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1706                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1707         };
1708
1709         struct nlattr *nl_band;
1710         struct nlattr *nl_freq;
1711         struct nlattr *nl_rate;
1712         int rem_band, rem_freq, rem_rate;
1713         struct hostapd_hw_modes *mode;
1714         int idx, mode_is_set;
1715
1716         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1717                   genlmsg_attrlen(gnlh, 0), NULL);
1718
1719         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1720                 return NL_SKIP;
1721
1722         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1723                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1724                 if (!mode)
1725                         return NL_SKIP;
1726                 phy_info->modes = mode;
1727
1728                 mode_is_set = 0;
1729
1730                 mode = &phy_info->modes[*(phy_info->num_modes)];
1731                 memset(mode, 0, sizeof(*mode));
1732                 *(phy_info->num_modes) += 1;
1733
1734                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1735                           nla_len(nl_band), NULL);
1736
1737                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1738                         mode->ht_capab = nla_get_u16(
1739                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1740                 }
1741
1742                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1743                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1744                                   nla_len(nl_freq), freq_policy);
1745                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1746                                 continue;
1747                         mode->num_channels++;
1748                 }
1749
1750                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1751                 if (!mode->channels)
1752                         return NL_SKIP;
1753
1754                 idx = 0;
1755
1756                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1757                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1758                                   nla_len(nl_freq), freq_policy);
1759                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1760                                 continue;
1761
1762                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1763                         mode->channels[idx].flag = 0;
1764
1765                         if (!mode_is_set) {
1766                                 /* crude heuristic */
1767                                 if (mode->channels[idx].freq < 4000)
1768                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1769                                 else
1770                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1771                                 mode_is_set = 1;
1772                         }
1773
1774                         /* crude heuristic */
1775                         if (mode->channels[idx].freq < 4000)
1776                                 if (mode->channels[idx].freq == 2484)
1777                                         mode->channels[idx].chan = 14;
1778                                 else
1779                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1780                         else
1781                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1782
1783                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1784                                 mode->channels[idx].flag |=
1785                                         HOSTAPD_CHAN_DISABLED;
1786                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1787                                 mode->channels[idx].flag |=
1788                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1789                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1790                                 mode->channels[idx].flag |=
1791                                         HOSTAPD_CHAN_NO_IBSS;
1792                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1793                                 mode->channels[idx].flag |=
1794                                         HOSTAPD_CHAN_RADAR;
1795
1796                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1797                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1798                                 mode->channels[idx].max_tx_power =
1799                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1800
1801                         idx++;
1802                 }
1803
1804                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1805                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1806                                   nla_len(nl_rate), rate_policy);
1807                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1808                                 continue;
1809                         mode->num_rates++;
1810                 }
1811
1812                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1813                 if (!mode->rates)
1814                         return NL_SKIP;
1815
1816                 idx = 0;
1817
1818                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1819                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1820                                   nla_len(nl_rate), rate_policy);
1821                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1822                                 continue;
1823                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1824
1825                         /* crude heuristic */
1826                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1827                             mode->rates[idx].rate > 200)
1828                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1829
1830                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1831                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1832
1833                         idx++;
1834                 }
1835         }
1836
1837         return NL_SKIP;
1838 }
1839
1840 static struct hostapd_hw_modes *
1841 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1842 {
1843         u16 m;
1844         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1845         int i, mode11g_idx = -1;
1846
1847         /* If only 802.11g mode is included, use it to construct matching
1848          * 802.11b mode data. */
1849
1850         for (m = 0; m < *num_modes; m++) {
1851                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1852                         return modes; /* 802.11b already included */
1853                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1854                         mode11g_idx = m;
1855         }
1856
1857         if (mode11g_idx < 0)
1858                 return modes; /* 2.4 GHz band not supported at all */
1859
1860         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1861         if (nmodes == NULL)
1862                 return modes; /* Could not add 802.11b mode */
1863
1864         mode = &nmodes[*num_modes];
1865         os_memset(mode, 0, sizeof(*mode));
1866         (*num_modes)++;
1867         modes = nmodes;
1868
1869         mode->mode = HOSTAPD_MODE_IEEE80211B;
1870
1871         mode11g = &modes[mode11g_idx];
1872         mode->num_channels = mode11g->num_channels;
1873         mode->channels = os_malloc(mode11g->num_channels *
1874                                    sizeof(struct hostapd_channel_data));
1875         if (mode->channels == NULL) {
1876                 (*num_modes)--;
1877                 return modes; /* Could not add 802.11b mode */
1878         }
1879         os_memcpy(mode->channels, mode11g->channels,
1880                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
1881
1882         mode->num_rates = 0;
1883         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1884         if (mode->rates == NULL) {
1885                 os_free(mode->channels);
1886                 (*num_modes)--;
1887                 return modes; /* Could not add 802.11b mode */
1888         }
1889
1890         for (i = 0; i < mode11g->num_rates; i++) {
1891                 if (mode11g->rates[i].rate > 110 ||
1892                     mode11g->rates[i].flags &
1893                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1894                         continue;
1895                 mode->rates[mode->num_rates] = mode11g->rates[i];
1896                 mode->num_rates++;
1897                 if (mode->num_rates == 4)
1898                         break;
1899         }
1900
1901         if (mode->num_rates == 0) {
1902                 os_free(mode->channels);
1903                 os_free(mode->rates);
1904                 (*num_modes)--;
1905                 return modes; /* No 802.11b rates */
1906         }
1907
1908         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1909                    "information");
1910
1911         return modes;
1912 }
1913
1914
1915 static struct hostapd_hw_modes *
1916 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1917 {
1918         struct wpa_driver_nl80211_data *drv = priv;
1919         struct nl_msg *msg;
1920         struct phy_info_arg result = {
1921                 .num_modes = num_modes,
1922                 .modes = NULL,
1923         };
1924
1925         *num_modes = 0;
1926         *flags = 0;
1927
1928         msg = nlmsg_alloc();
1929         if (!msg)
1930                 return NULL;
1931
1932         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1933                     0, NL80211_CMD_GET_WIPHY, 0);
1934
1935         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1936
1937         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1938                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1939  nla_put_failure:
1940         return NULL;
1941 }
1942
1943
1944 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1945                                          const void *data, size_t len,
1946                                          int encrypt)
1947 {
1948         __u8 rtap_hdr[] = {
1949                 0x00, 0x00, /* radiotap version */
1950                 0x0e, 0x00, /* radiotap length */
1951                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1952                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1953                 0x00,       /* padding */
1954                 0x00, 0x00, /* RX and TX flags to indicate that */
1955                 0x00, 0x00, /* this is the injected frame directly */
1956         };
1957         struct iovec iov[2] = {
1958                 {
1959                         .iov_base = &rtap_hdr,
1960                         .iov_len = sizeof(rtap_hdr),
1961                 },
1962                 {
1963                         .iov_base = (void *) data,
1964                         .iov_len = len,
1965                 }
1966         };
1967         struct msghdr msg = {
1968                 .msg_name = NULL,
1969                 .msg_namelen = 0,
1970                 .msg_iov = iov,
1971                 .msg_iovlen = 2,
1972                 .msg_control = NULL,
1973                 .msg_controllen = 0,
1974                 .msg_flags = 0,
1975         };
1976
1977         if (encrypt)
1978                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
1979
1980         return sendmsg(drv->monitor_sock, &msg, 0);
1981 }
1982
1983
1984 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
1985                                         size_t data_len)
1986 {
1987         struct wpa_driver_nl80211_data *drv = priv;
1988         struct ieee80211_mgmt *mgmt;
1989         int do_not_encrypt = 0;
1990         u16 fc;
1991
1992         mgmt = (struct ieee80211_mgmt *) data;
1993         fc = le_to_host16(mgmt->frame_control);
1994
1995         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
1996             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
1997                 /*
1998                  * Only one of the authentication frame types is encrypted.
1999                  * In order for static WEP encryption to work properly (i.e.,
2000                  * to not encrypt the frame), we need to tell mac80211 about
2001                  * the frames that must not be encrypted.
2002                  */
2003                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2004                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2005                 if (auth_alg == WLAN_AUTH_OPEN ||
2006                     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2007                         do_not_encrypt = 1;
2008         }
2009
2010         return wpa_driver_nl80211_send_frame(drv, data, data_len,
2011                                              !do_not_encrypt);
2012 }
2013
2014
2015 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2016                                                const u8 *head, size_t head_len,
2017                                                const u8 *tail, size_t tail_len,
2018                                                int dtim_period)
2019 {
2020         struct wpa_driver_nl80211_data *drv = priv;
2021         struct nl_msg *msg;
2022         u8 cmd = NL80211_CMD_NEW_BEACON;
2023         int ret;
2024         int beacon_set;
2025 #ifdef HOSTAPD
2026         struct i802_bss *bss;
2027
2028         bss = get_bss(drv, ifindex);
2029         if (bss == NULL)
2030                 return -ENOENT;
2031         beacon_set = bss->beacon_set;
2032 #else /* HOSTAPD */
2033         beacon_set = drv->beacon_set;
2034 #endif /* HOSTAPD */
2035
2036         msg = nlmsg_alloc();
2037         if (!msg)
2038                 return -ENOMEM;
2039
2040         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2041                    beacon_set);
2042         if (beacon_set)
2043                 cmd = NL80211_CMD_SET_BEACON;
2044
2045         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2046                     0, cmd, 0);
2047         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2048         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2049         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2050         if (!drv->beacon_int)
2051                 drv->beacon_int = 100;
2052         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2053         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2054
2055         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2056         if (ret) {
2057                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2058                            ret, strerror(-ret));
2059         } else {
2060 #ifdef HOSTAPD
2061                 bss->beacon_set = 1;
2062 #else /* HOSTAPD */
2063                 drv->beacon_set = 1;
2064 #endif /* HOSTAPD */
2065         }
2066         return ret;
2067  nla_put_failure:
2068         return -ENOBUFS;
2069 }
2070
2071
2072 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2073 {
2074         struct wpa_driver_nl80211_data *drv = priv;
2075         struct nl_msg *msg;
2076
2077         drv->beacon_int = value;
2078
2079 #ifdef HOSTAPD
2080         if (!drv->bss.beacon_set)
2081                 return 0;
2082 #else /* HOSTAPD */
2083         if (!drv->beacon_set)
2084                 return 0;
2085 #endif /* HOSTAPD */
2086
2087         msg = nlmsg_alloc();
2088         if (!msg)
2089                 return -ENOMEM;
2090
2091         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2092         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2093                     0, NL80211_CMD_SET_BEACON, 0);
2094         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2095
2096         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2097
2098         return send_and_recv_msgs(drv, msg, NULL, NULL);
2099  nla_put_failure:
2100         return -ENOBUFS;
2101 }
2102
2103 #endif /* CONFIG_AP || HOSTAPD */
2104
2105
2106 #ifdef CONFIG_AP
2107
2108 static int wpa_driver_nl80211_set_beacon(void *priv,
2109                                          const u8 *head, size_t head_len,
2110                                          const u8 *tail, size_t tail_len,
2111                                          int dtim_period)
2112 {
2113         struct wpa_driver_nl80211_data *drv = priv;
2114         return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2115                                                    head, head_len,
2116                                                    tail, tail_len,
2117                                                    dtim_period);
2118 }
2119
2120
2121 static int wpa_driver_nl80211_set_freq2(
2122         struct wpa_driver_nl80211_data *drv,
2123         struct wpa_driver_associate_params *params)
2124 {
2125         struct nl_msg *msg;
2126         int ret;
2127
2128         msg = nlmsg_alloc();
2129         if (!msg)
2130                 return -1;
2131
2132         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2133                     NL80211_CMD_SET_WIPHY, 0);
2134
2135         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2136
2137         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2138
2139         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2140         if (ret == 0)
2141                 return 0;
2142         wpa_printf(MSG_DEBUG, "nl80211: MLME Failed to set channel (freq=%d): "
2143                    "%d (%s)", params->freq, ret, strerror(-ret));
2144 nla_put_failure:
2145         return -1;
2146 }
2147
2148 #endif /* CONFIG_AP */
2149
2150 #if defined(CONFIG_AP) || defined(HOSTAPD)
2151
2152 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2153                                  int ifidx)
2154 {
2155         struct nl_msg *msg;
2156
2157 #ifdef HOSTAPD
2158         /* stop listening for EAPOL on this interface */
2159         del_ifidx(drv, ifidx);
2160 #endif /* HOSTAPD */
2161
2162         msg = nlmsg_alloc();
2163         if (!msg)
2164                 goto nla_put_failure;
2165
2166         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2167                     0, NL80211_CMD_DEL_INTERFACE, 0);
2168         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2169
2170         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2171                 return;
2172  nla_put_failure:
2173         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2174                    ifidx);
2175 }
2176
2177
2178 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2179                                 const char *ifname, enum nl80211_iftype iftype,
2180                                 const u8 *addr)
2181 {
2182         struct nl_msg *msg, *flags = NULL;
2183         int ifidx;
2184         int ret = -ENOBUFS;
2185 #ifdef HOSTAPD
2186         struct ifreq ifreq;
2187         struct iwreq iwr;
2188 #endif /* HOSTAPD */
2189
2190         msg = nlmsg_alloc();
2191         if (!msg)
2192                 return -1;
2193
2194         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2195                     0, NL80211_CMD_NEW_INTERFACE, 0);
2196         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2197         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2198         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2199
2200         if (iftype == NL80211_IFTYPE_MONITOR) {
2201                 int err;
2202
2203                 flags = nlmsg_alloc();
2204                 if (!flags)
2205                         goto nla_put_failure;
2206
2207                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2208
2209                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2210
2211                 nlmsg_free(flags);
2212
2213                 if (err)
2214                         goto nla_put_failure;
2215         }
2216
2217         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2218         if (ret) {
2219  nla_put_failure:
2220                 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2221                            ifname);
2222                 return ret;
2223         }
2224
2225         ifidx = if_nametoindex(ifname);
2226
2227         if (ifidx <= 0)
2228                 return -1;
2229
2230 #ifdef HOSTAPD
2231         /* start listening for EAPOL on this interface */
2232         add_ifidx(drv, ifidx);
2233
2234         if (addr) {
2235                 switch (iftype) {
2236                 case NL80211_IFTYPE_AP:
2237                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
2238                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
2239                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
2240
2241                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
2242                                 nl80211_remove_iface(drv, ifidx);
2243                                 return -1;
2244                         }
2245                         break;
2246                 case NL80211_IFTYPE_WDS:
2247                         memset(&iwr, 0, sizeof(iwr));
2248                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
2249                         iwr.u.addr.sa_family = ARPHRD_ETHER;
2250                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
2251                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
2252                                 return -1;
2253                         break;
2254                 default:
2255                         /* nothing */
2256                         break;
2257                 }
2258         }
2259 #endif /* HOSTAPD */
2260
2261         return ifidx;
2262 }
2263
2264 #endif /* CONFIG_AP || HOSTAPD */
2265
2266 #ifdef CONFIG_AP
2267
2268 void ap_tx_status(void *ctx, const u8 *addr,
2269                   const u8 *buf, size_t len, int ack);
2270 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2271 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2272                 struct hostapd_frame_info *fi);
2273 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2274
2275 #endif /* CONFIG_AP */
2276
2277 #if defined(CONFIG_AP) || defined(HOSTAPD)
2278
2279 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2280 {
2281         struct ieee80211_hdr *hdr;
2282         u16 fc, type, stype;
2283
2284         hdr = (struct ieee80211_hdr *) buf;
2285         fc = le_to_host16(hdr->frame_control);
2286
2287         type = WLAN_FC_GET_TYPE(fc);
2288         stype = WLAN_FC_GET_STYPE(fc);
2289
2290         switch (type) {
2291         case WLAN_FC_TYPE_MGMT:
2292                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2293                            ok ? "ACK" : "fail");
2294 #ifdef HOSTAPD
2295                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2296 #else /* HOSTAPD */
2297                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2298 #endif /* HOSTAPD */
2299                 break;
2300         case WLAN_FC_TYPE_CTRL:
2301                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2302                            ok ? "ACK" : "fail");
2303                 break;
2304         case WLAN_FC_TYPE_DATA:
2305 #ifdef HOSTAPD
2306                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2307 #else /* HOSTAPD */
2308                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2309 #endif /* HOSTAPD */
2310                 break;
2311         default:
2312                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2313                            type);
2314                 break;
2315         }
2316 }
2317
2318 #endif /* CONFIG_AP || HOSTAPD */
2319
2320 #ifdef CONFIG_AP
2321
2322 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2323                          u8 *buf, size_t len,
2324                          struct hostapd_frame_info *hfi,
2325                          enum ieee80211_msg_type msg_type)
2326 {
2327         struct ieee80211_hdr *hdr;
2328         u16 fc, type, stype;
2329         size_t data_len = len;
2330
2331         /*
2332          * PS-Poll frames are 16 bytes. All other frames are
2333          * 24 bytes or longer.
2334          */
2335         if (len < 16)
2336                 return;
2337
2338         hdr = (struct ieee80211_hdr *) buf;
2339         fc = le_to_host16(hdr->frame_control);
2340
2341         type = WLAN_FC_GET_TYPE(fc);
2342         stype = WLAN_FC_GET_STYPE(fc);
2343
2344         switch (type) {
2345         case WLAN_FC_TYPE_DATA:
2346                 if (len < 24)
2347                         return;
2348                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2349                 case WLAN_FC_TODS:
2350                         break;
2351                 case WLAN_FC_FROMDS:
2352                         break;
2353                 default:
2354                         /* discard */
2355                         return;
2356                 }
2357                 break;
2358         case WLAN_FC_TYPE_CTRL:
2359                 /* discard non-ps-poll frames */
2360                 if (stype != WLAN_FC_STYPE_PSPOLL)
2361                         return;
2362                 break;
2363         case WLAN_FC_TYPE_MGMT:
2364                 break;
2365         default:
2366                 /* discard */
2367                 return;
2368         }
2369
2370         switch (msg_type) {
2371         case ieee80211_msg_normal:
2372                 /* continue processing */
2373                 break;
2374         case ieee80211_msg_tx_callback_ack:
2375                 handle_tx_callback(drv->ctx, buf, data_len, 1);
2376                 return;
2377         case ieee80211_msg_tx_callback_fail:
2378                 handle_tx_callback(drv->ctx, buf, data_len, 0);
2379                 return;
2380         }
2381
2382         switch (type) {
2383         case WLAN_FC_TYPE_MGMT:
2384                 if (stype != WLAN_FC_STYPE_BEACON &&
2385                     stype != WLAN_FC_STYPE_PROBE_REQ)
2386                         wpa_printf(MSG_MSGDUMP, "MGMT");
2387                 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2388                 break;
2389         case WLAN_FC_TYPE_CTRL:
2390                 /* can only get here with PS-Poll frames */
2391                 wpa_printf(MSG_DEBUG, "CTRL");
2392                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2393                 break;
2394         case WLAN_FC_TYPE_DATA:
2395                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2396                 break;
2397         }
2398 }
2399
2400 #endif /* CONFIG_AP */
2401
2402 #if defined(CONFIG_AP) || defined(HOSTAPD)
2403
2404 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2405 {
2406         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2407         int len;
2408         unsigned char buf[3000];
2409         struct ieee80211_radiotap_iterator iter;
2410         int ret;
2411         struct hostapd_frame_info hfi;
2412         int injected = 0, failed = 0, msg_type, rxflags = 0;
2413
2414         len = recv(sock, buf, sizeof(buf), 0);
2415         if (len < 0) {
2416                 perror("recv");
2417                 return;
2418         }
2419
2420         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2421                 printf("received invalid radiotap frame\n");
2422                 return;
2423         }
2424
2425         memset(&hfi, 0, sizeof(hfi));
2426
2427         while (1) {
2428                 ret = ieee80211_radiotap_iterator_next(&iter);
2429                 if (ret == -ENOENT)
2430                         break;
2431                 if (ret) {
2432                         printf("received invalid radiotap frame (%d)\n", ret);
2433                         return;
2434                 }
2435                 switch (iter.this_arg_index) {
2436                 case IEEE80211_RADIOTAP_FLAGS:
2437                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2438                                 len -= 4;
2439                         break;
2440                 case IEEE80211_RADIOTAP_RX_FLAGS:
2441                         rxflags = 1;
2442                         break;
2443                 case IEEE80211_RADIOTAP_TX_FLAGS:
2444                         injected = 1;
2445                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2446                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2447                         break;
2448                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2449                         break;
2450                 case IEEE80211_RADIOTAP_CHANNEL:
2451                         /* TODO convert from freq/flags to channel number
2452                         hfi.channel = XXX;
2453                         hfi.phytype = XXX;
2454                          */
2455                         break;
2456                 case IEEE80211_RADIOTAP_RATE:
2457                         hfi.datarate = *iter.this_arg * 5;
2458                         break;
2459                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2460                         hfi.ssi_signal = *iter.this_arg;
2461                         break;
2462                 }
2463         }
2464
2465         if (rxflags && injected)
2466                 return;
2467
2468         if (!injected)
2469                 msg_type = ieee80211_msg_normal;
2470         else if (failed)
2471                 msg_type = ieee80211_msg_tx_callback_fail;
2472         else
2473                 msg_type = ieee80211_msg_tx_callback_ack;
2474
2475         handle_frame(drv, buf + iter.max_length,
2476                      len - iter.max_length, &hfi, msg_type);
2477 }
2478
2479
2480 /*
2481  * we post-process the filter code later and rewrite
2482  * this to the offset to the last instruction
2483  */
2484 #define PASS    0xFF
2485 #define FAIL    0xFE
2486
2487 static struct sock_filter msock_filter_insns[] = {
2488         /*
2489          * do a little-endian load of the radiotap length field
2490          */
2491         /* load lower byte into A */
2492         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2493         /* put it into X (== index register) */
2494         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2495         /* load upper byte into A */
2496         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2497         /* left-shift it by 8 */
2498         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2499         /* or with X */
2500         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2501         /* put result into X */
2502         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2503
2504         /*
2505          * Allow management frames through, this also gives us those
2506          * management frames that we sent ourselves with status
2507          */
2508         /* load the lower byte of the IEEE 802.11 frame control field */
2509         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2510         /* mask off frame type and version */
2511         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2512         /* accept frame if it's both 0, fall through otherwise */
2513         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2514
2515         /*
2516          * TODO: add a bit to radiotap RX flags that indicates
2517          * that the sending station is not associated, then
2518          * add a filter here that filters on our DA and that flag
2519          * to allow us to deauth frames to that bad station.
2520          *
2521          * Not a regression -- we didn't do it before either.
2522          */
2523
2524 #if 0
2525         /*
2526          * drop non-data frames, WDS frames
2527          */
2528         /* load the lower byte of the frame control field */
2529         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2530         /* mask off QoS bit */
2531         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2532         /* drop non-data frames */
2533         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2534         /* load the upper byte of the frame control field */
2535         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2536         /* mask off toDS/fromDS */
2537         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2538         /* drop WDS frames */
2539         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2540 #endif
2541
2542         /*
2543          * add header length to index
2544          */
2545         /* load the lower byte of the frame control field */
2546         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2547         /* mask off QoS bit */
2548         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2549         /* right shift it by 6 to give 0 or 2 */
2550         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2551         /* add data frame header length */
2552         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2553         /* add index, was start of 802.11 header */
2554         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2555         /* move to index, now start of LL header */
2556         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2557
2558         /*
2559          * Accept empty data frames, we use those for
2560          * polling activity.
2561          */
2562         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2563         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2564
2565         /*
2566          * Accept EAPOL frames
2567          */
2568         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2569         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2570         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2571         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2572
2573         /* keep these last two statements or change the code below */
2574         /* return 0 == "DROP" */
2575         BPF_STMT(BPF_RET | BPF_K, 0),
2576         /* return ~0 == "keep all" */
2577         BPF_STMT(BPF_RET | BPF_K, ~0),
2578 };
2579
2580 static struct sock_fprog msock_filter = {
2581         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2582         .filter = msock_filter_insns,
2583 };
2584
2585
2586 static int add_monitor_filter(int s)
2587 {
2588         int idx;
2589
2590         /* rewrite all PASS/FAIL jump offsets */
2591         for (idx = 0; idx < msock_filter.len; idx++) {
2592                 struct sock_filter *insn = &msock_filter_insns[idx];
2593
2594                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2595                         if (insn->code == (BPF_JMP|BPF_JA)) {
2596                                 if (insn->k == PASS)
2597                                         insn->k = msock_filter.len - idx - 2;
2598                                 else if (insn->k == FAIL)
2599                                         insn->k = msock_filter.len - idx - 3;
2600                         }
2601
2602                         if (insn->jt == PASS)
2603                                 insn->jt = msock_filter.len - idx - 2;
2604                         else if (insn->jt == FAIL)
2605                                 insn->jt = msock_filter.len - idx - 3;
2606
2607                         if (insn->jf == PASS)
2608                                 insn->jf = msock_filter.len - idx - 2;
2609                         else if (insn->jf == FAIL)
2610                                 insn->jf = msock_filter.len - idx - 3;
2611                 }
2612         }
2613
2614         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2615                        &msock_filter, sizeof(msock_filter))) {
2616                 perror("SO_ATTACH_FILTER");
2617                 return -1;
2618         }
2619
2620         return 0;
2621 }
2622
2623
2624 static int
2625 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2626 {
2627         char buf[IFNAMSIZ];
2628         struct sockaddr_ll ll;
2629         int optval;
2630         socklen_t optlen;
2631
2632         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2633         buf[IFNAMSIZ - 1] = '\0';
2634
2635         drv->monitor_ifidx =
2636                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2637
2638         if (drv->monitor_ifidx < 0)
2639                 return -1;
2640
2641         if (hostapd_set_iface_flags(drv, buf, 1))
2642                 goto error;
2643
2644         memset(&ll, 0, sizeof(ll));
2645         ll.sll_family = AF_PACKET;
2646         ll.sll_ifindex = drv->monitor_ifidx;
2647         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2648         if (drv->monitor_sock < 0) {
2649                 perror("socket[PF_PACKET,SOCK_RAW]");
2650                 goto error;
2651         }
2652
2653         if (add_monitor_filter(drv->monitor_sock)) {
2654                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2655                            "interface; do filtering in user space");
2656                 /* This works, but will cost in performance. */
2657         }
2658
2659         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2660                 perror("monitor socket bind");
2661                 goto error;
2662         }
2663
2664         optlen = sizeof(optval);
2665         optval = 20;
2666         if (setsockopt
2667             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2668                 perror("Failed to set socket priority");
2669                 goto error;
2670         }
2671
2672         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2673                                      drv, NULL)) {
2674                 printf("Could not register monitor read socket\n");
2675                 goto error;
2676         }
2677
2678         return 0;
2679  error:
2680         nl80211_remove_iface(drv, drv->monitor_ifidx);
2681         return -1;
2682 }
2683
2684 #endif /* CONFIG_AP || HOSTAPD */
2685
2686 #ifdef CONFIG_AP
2687
2688 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2689                                  struct wpa_driver_associate_params *params)
2690 {
2691         if (drv->monitor_ifidx < 0 &&
2692             nl80211_create_monitor_interface(drv))
2693                 return -1;
2694
2695         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2696             wpa_driver_nl80211_set_freq2(drv, params)) {
2697                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2698                 drv->monitor_ifidx = -1;
2699                 return -1;
2700         }
2701
2702         /* TODO: setup monitor interface (and add code somewhere to remove this
2703          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2704
2705         return 0;
2706 }
2707 #endif /* CONFIG_AP */
2708
2709
2710 static int wpa_driver_nl80211_associate(
2711         void *priv, struct wpa_driver_associate_params *params)
2712 {
2713         struct wpa_driver_nl80211_data *drv = priv;
2714         int ret = -1;
2715         struct nl_msg *msg;
2716
2717 #ifdef CONFIG_AP
2718         if (params->mode == 2)
2719                 return wpa_driver_nl80211_ap(drv, params);
2720 #endif /* CONFIG_AP */
2721
2722         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2723                                           params->drop_unencrypted);
2724
2725         drv->associated = 0;
2726
2727         msg = nlmsg_alloc();
2728         if (!msg)
2729                 return -1;
2730
2731         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2732                    drv->ifindex);
2733         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2734                     NL80211_CMD_ASSOCIATE, 0);
2735
2736         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2737         if (params->bssid) {
2738                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2739                            MAC2STR(params->bssid));
2740                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2741         }
2742         if (params->freq) {
2743                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2744                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2745         }
2746         if (params->ssid) {
2747                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2748                                   params->ssid, params->ssid_len);
2749                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2750                         params->ssid);
2751                 if (params->ssid_len > sizeof(drv->ssid))
2752                         goto nla_put_failure;
2753                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2754                 drv->ssid_len = params->ssid_len;
2755         }
2756         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
2757         if (params->wpa_ie)
2758                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2759                         params->wpa_ie);
2760
2761         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2762         msg = NULL;
2763         if (ret) {
2764                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2765                            "(%s)", ret, strerror(-ret));
2766                 goto nla_put_failure;
2767         }
2768         ret = 0;
2769         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2770                    "successfully");
2771
2772 nla_put_failure:
2773         nlmsg_free(msg);
2774         return ret;
2775 }
2776
2777
2778 /**
2779  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2780  * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2781  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2782  * Returns: 0 on success, -1 on failure
2783  */
2784 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2785                                        int mode)
2786 {
2787         int ret = -1;
2788         struct nl_msg *msg;
2789         int nlmode;
2790
2791         switch (mode) {
2792         case 0:
2793                 nlmode = NL80211_IFTYPE_STATION;
2794                 break;
2795         case 1:
2796                 nlmode = NL80211_IFTYPE_ADHOC;
2797                 break;
2798         case 2:
2799                 nlmode = NL80211_IFTYPE_AP;
2800                 break;
2801         default:
2802                 return -1;
2803         }
2804
2805         msg = nlmsg_alloc();
2806         if (!msg)
2807                 return -1;
2808
2809         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2810                     0, NL80211_CMD_SET_INTERFACE, 0);
2811         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2812         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2813
2814         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2815         if (!ret)
2816                 return 0;
2817         else
2818                 goto try_again;
2819
2820 nla_put_failure:
2821         wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2822                    ret, strerror(-ret));
2823         return -1;
2824
2825 try_again:
2826         /* mac80211 doesn't allow mode changes while the device is up, so
2827          * take the device down, try to set the mode again, and bring the
2828          * device back up.
2829          */
2830         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2831                 /* Try to set the mode again while the interface is down */
2832                 msg = nlmsg_alloc();
2833                 if (!msg)
2834                         return -1;
2835
2836                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2837                             0, NL80211_CMD_SET_INTERFACE, 0);
2838                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2839                 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2840                 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2841                 if (ret) {
2842                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
2843                                    "mode(try_again): %d (%s)",
2844                                    drv->ifname, ret, strerror(-ret));
2845                 }
2846
2847                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2848                         ret = -1;
2849         }
2850
2851         return ret;
2852 }
2853
2854
2855 static int wpa_driver_nl80211_get_capa(void *priv,
2856                                        struct wpa_driver_capa *capa)
2857 {
2858         struct wpa_driver_nl80211_data *drv = priv;
2859         if (!drv->has_capability)
2860                 return -1;
2861         os_memcpy(capa, &drv->capa, sizeof(*capa));
2862         return 0;
2863 }
2864
2865
2866 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2867 {
2868         struct wpa_driver_nl80211_data *drv = priv;
2869
2870         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2871                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2872         drv->operstate = state;
2873         return wpa_driver_nl80211_send_oper_ifla(
2874                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2875 }
2876
2877
2878 #ifdef HOSTAPD
2879
2880 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2881
2882 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2883 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2884
2885
2886 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2887                                  int ifindex)
2888 {
2889         struct i802_bss *bss = &drv->bss;
2890         while (bss) {
2891                 if (ifindex == bss->ifindex)
2892                         return bss;
2893                 bss = bss->next;
2894         }
2895         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
2896         return NULL;
2897 }
2898
2899
2900 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2901 {
2902         int i;
2903         int *old;
2904
2905         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
2906                    ifidx);
2907         for (i = 0; i < drv->num_if_indices; i++) {
2908                 if (drv->if_indices[i] == 0) {
2909                         drv->if_indices[i] = ifidx;
2910                         return;
2911                 }
2912         }
2913
2914         if (drv->if_indices != drv->default_if_indices)
2915                 old = drv->if_indices;
2916         else
2917                 old = NULL;
2918
2919         drv->if_indices = realloc(old,
2920                                   sizeof(int) * (drv->num_if_indices + 1));
2921         if (!drv->if_indices) {
2922                 if (!old)
2923                         drv->if_indices = drv->default_if_indices;
2924                 else
2925                         drv->if_indices = old;
2926                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
2927                            "interfaces");
2928                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
2929                 return;
2930         }
2931         drv->if_indices[drv->num_if_indices] = ifidx;
2932         drv->num_if_indices++;
2933 }
2934
2935
2936 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2937 {
2938         int i;
2939
2940         for (i = 0; i < drv->num_if_indices; i++) {
2941                 if (drv->if_indices[i] == ifidx) {
2942                         drv->if_indices[i] = 0;
2943                         break;
2944                 }
2945         }
2946 }
2947
2948
2949 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2950 {
2951         int i;
2952
2953         for (i = 0; i < drv->num_if_indices; i++)
2954                 if (drv->if_indices[i] == ifidx)
2955                         return 1;
2956
2957         return 0;
2958 }
2959
2960
2961 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
2962                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
2963                         size_t seq_len, const u8 *key, size_t key_len)
2964 {
2965         struct wpa_driver_nl80211_data *drv = priv;
2966         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
2967                            set_tx, seq, seq_len, key, key_len);
2968 }
2969
2970
2971 static inline int min_int(int a, int b)
2972 {
2973         if (a < b)
2974                 return a;
2975         return b;
2976 }
2977
2978
2979 static int get_key_handler(struct nl_msg *msg, void *arg)
2980 {
2981         struct nlattr *tb[NL80211_ATTR_MAX + 1];
2982         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2983
2984         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2985                   genlmsg_attrlen(gnlh, 0), NULL);
2986
2987         /*
2988          * TODO: validate the key index and mac address!
2989          * Otherwise, there's a race condition as soon as
2990          * the kernel starts sending key notifications.
2991          */
2992
2993         if (tb[NL80211_ATTR_KEY_SEQ])
2994                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
2995                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
2996         return NL_SKIP;
2997 }
2998
2999
3000 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3001                            int idx, u8 *seq)
3002 {
3003         struct wpa_driver_nl80211_data *drv = priv;
3004         struct nl_msg *msg;
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,
3011                     0, NL80211_CMD_GET_KEY, 0);
3012
3013         if (addr)
3014                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3015         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3016         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3017
3018         memset(seq, 0, 6);
3019
3020         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3021  nla_put_failure:
3022         return -ENOBUFS;
3023 }
3024
3025
3026 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3027                               int mode)
3028 {
3029         struct wpa_driver_nl80211_data *drv = priv;
3030         struct nl_msg *msg;
3031         u8 rates[NL80211_MAX_SUPP_RATES];
3032         u8 rates_len = 0;
3033         int i;
3034
3035         msg = nlmsg_alloc();
3036         if (!msg)
3037                 return -ENOMEM;
3038
3039         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3040                     NL80211_CMD_SET_BSS, 0);
3041
3042         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3043                 rates[rates_len++] = basic_rates[i] / 5;
3044
3045         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3046
3047         /* TODO: multi-BSS support */
3048         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3049
3050         return send_and_recv_msgs(drv, msg, NULL, NULL);
3051  nla_put_failure:
3052         return -ENOBUFS;
3053 }
3054
3055
3056 /* Set kernel driver on given frequency (MHz) */
3057 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3058 {
3059         struct wpa_driver_nl80211_data *drv = priv;
3060         struct nl_msg *msg;
3061
3062         msg = nlmsg_alloc();
3063         if (!msg)
3064                 return -1;
3065
3066         drv->last_freq = freq->freq;
3067         drv->last_freq_ht = freq->ht_enabled;
3068
3069         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3070                     NL80211_CMD_SET_WIPHY, 0);
3071
3072         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3073         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq);
3074         if (freq->ht_enabled) {
3075                 switch (freq->sec_channel_offset) {
3076                 case -1:
3077                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3078                                     NL80211_CHAN_HT40MINUS);
3079                         break;
3080                 case 1:
3081                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3082                                     NL80211_CHAN_HT40PLUS);
3083                         break;
3084                 default:
3085                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3086                                     NL80211_CHAN_HT20);
3087                         break;
3088                 }
3089         }
3090
3091         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3092                 return 0;
3093  nla_put_failure:
3094         return -1;
3095 }
3096
3097
3098 static int i802_set_rts(void *priv, int rts)
3099 {
3100         struct wpa_driver_nl80211_data *drv = priv;
3101         struct iwreq iwr;
3102
3103         memset(&iwr, 0, sizeof(iwr));
3104         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3105         iwr.u.rts.value = rts;
3106         iwr.u.rts.fixed = 1;
3107
3108         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3109                 perror("ioctl[SIOCSIWRTS]");
3110                 return -1;
3111         }
3112
3113         return 0;
3114 }
3115
3116
3117 static int i802_set_frag(void *priv, int frag)
3118 {
3119         struct wpa_driver_nl80211_data *drv = priv;
3120         struct iwreq iwr;
3121
3122         memset(&iwr, 0, sizeof(iwr));
3123         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3124         iwr.u.frag.value = frag;
3125         iwr.u.frag.fixed = 1;
3126
3127         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3128                 perror("ioctl[SIOCSIWFRAG]");
3129                 return -1;
3130         }
3131
3132         return 0;
3133 }
3134
3135
3136 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3137 {
3138         struct wpa_driver_nl80211_data *drv = priv;
3139         struct iwreq iwr;
3140
3141         memset(&iwr, 0, sizeof(iwr));
3142         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3143
3144         iwr.u.retry.value = short_retry;
3145         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3146         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3147                 perror("ioctl[SIOCSIWRETRY(short)]");
3148                 return -1;
3149         }
3150
3151         iwr.u.retry.value = long_retry;
3152         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3153         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3154                 perror("ioctl[SIOCSIWRETRY(long)]");
3155                 return -1;
3156         }
3157
3158         return 0;
3159 }
3160
3161
3162 static int i802_flush(void *priv)
3163 {
3164         struct wpa_driver_nl80211_data *drv = priv;
3165         struct nl_msg *msg;
3166
3167         msg = nlmsg_alloc();
3168         if (!msg)
3169                 return -1;
3170
3171         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3172                     0, NL80211_CMD_DEL_STATION, 0);
3173
3174         /*
3175          * XXX: FIX! this needs to flush all VLANs too
3176          */
3177         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3178                     if_nametoindex(drv->ifname));
3179
3180         return send_and_recv_msgs(drv, msg, NULL, NULL);
3181  nla_put_failure:
3182         return -ENOBUFS;
3183 }
3184
3185
3186 static int get_sta_handler(struct nl_msg *msg, void *arg)
3187 {
3188         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3189         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3190         struct hostap_sta_driver_data *data = arg;
3191         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3192         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3193                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3194                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3195                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3196                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3197                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3198         };
3199
3200         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3201                   genlmsg_attrlen(gnlh, 0), NULL);
3202
3203         /*
3204          * TODO: validate the interface and mac address!
3205          * Otherwise, there's a race condition as soon as
3206          * the kernel starts sending station notifications.
3207          */
3208
3209         if (!tb[NL80211_ATTR_STA_INFO]) {
3210                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3211                 return NL_SKIP;
3212         }
3213         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3214                              tb[NL80211_ATTR_STA_INFO],
3215                              stats_policy)) {
3216                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3217                 return NL_SKIP;
3218         }
3219
3220         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3221                 data->inactive_msec =
3222                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3223         if (stats[NL80211_STA_INFO_RX_BYTES])
3224                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3225         if (stats[NL80211_STA_INFO_TX_BYTES])
3226                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3227         if (stats[NL80211_STA_INFO_RX_PACKETS])
3228                 data->rx_packets =
3229                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3230         if (stats[NL80211_STA_INFO_TX_PACKETS])
3231                 data->tx_packets =
3232                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3233
3234         return NL_SKIP;
3235 }
3236
3237 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3238                               const u8 *addr)
3239 {
3240         struct wpa_driver_nl80211_data *drv = priv;
3241         struct nl_msg *msg;
3242
3243         os_memset(data, 0, sizeof(*data));
3244         msg = nlmsg_alloc();
3245         if (!msg)
3246                 return -ENOMEM;
3247
3248         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3249                     0, NL80211_CMD_GET_STATION, 0);
3250
3251         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3252         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3253
3254         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3255  nla_put_failure:
3256         return -ENOBUFS;
3257 }
3258
3259
3260 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3261                            size_t data_len, int encrypt, const u8 *own_addr)
3262 {
3263         struct wpa_driver_nl80211_data *drv = priv;
3264         struct ieee80211_hdr *hdr;
3265         size_t len;
3266         u8 *pos;
3267         int res;
3268 #if 0 /* FIX */
3269         int qos = sta->flags & WLAN_STA_WME;
3270 #else
3271         int qos = 0;
3272 #endif
3273
3274         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3275                 data_len;
3276         hdr = os_zalloc(len);
3277         if (hdr == NULL) {
3278                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3279                        (unsigned long) len);
3280                 return -1;
3281         }
3282
3283         hdr->frame_control =
3284                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3285         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3286         if (encrypt)
3287                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3288 #if 0 /* To be enabled if qos determination is added above */
3289         if (qos) {
3290                 hdr->frame_control |=
3291                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3292         }
3293 #endif
3294
3295         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3296         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3297         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3298         pos = (u8 *) (hdr + 1);
3299
3300 #if 0 /* To be enabled if qos determination is added above */
3301         if (qos) {
3302                 /* add an empty QoS header if needed */
3303                 pos[0] = 0;
3304                 pos[1] = 0;
3305                 pos += 2;
3306         }
3307 #endif
3308
3309         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3310         pos += sizeof(rfc1042_header);
3311         WPA_PUT_BE16(pos, ETH_P_PAE);
3312         pos += 2;
3313         memcpy(pos, data, data_len);
3314
3315         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3316         if (res < 0) {
3317                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3318                            "failed: %d (%s)",
3319                            (unsigned long) len, errno, strerror(errno));
3320         }
3321         free(hdr);
3322
3323         return res;
3324 }
3325
3326
3327 static int i802_sta_add(const char *ifname, void *priv,
3328                         struct hostapd_sta_add_params *params)
3329 {
3330         struct wpa_driver_nl80211_data *drv = priv;
3331         struct nl_msg *msg;
3332         int ret = -ENOBUFS;
3333
3334         msg = nlmsg_alloc();
3335         if (!msg)
3336                 return -ENOMEM;
3337
3338         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3339                     0, NL80211_CMD_NEW_STATION, 0);
3340
3341         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3342                     if_nametoindex(drv->ifname));
3343         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3344         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3345         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3346                 params->supp_rates);
3347         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3348                     params->listen_interval);
3349
3350 #ifdef CONFIG_IEEE80211N
3351         if (params->ht_capabilities) {
3352                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3353                         params->ht_capabilities->length,
3354                         &params->ht_capabilities->data);
3355         }
3356 #endif /* CONFIG_IEEE80211N */
3357
3358         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3359         if (ret)
3360                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3361                            "result: %d (%s)", ret, strerror(-ret));
3362         if (ret == -EEXIST)
3363                 ret = 0;
3364  nla_put_failure:
3365         return ret;
3366 }
3367
3368
3369 static int i802_sta_remove(void *priv, const u8 *addr)
3370 {
3371         struct wpa_driver_nl80211_data *drv = priv;
3372         struct nl_msg *msg;
3373         int ret;
3374
3375         msg = nlmsg_alloc();
3376         if (!msg)
3377                 return -ENOMEM;
3378
3379         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3380                     0, NL80211_CMD_DEL_STATION, 0);
3381
3382         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3383                     if_nametoindex(drv->ifname));
3384         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3385
3386         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3387         if (ret == -ENOENT)
3388                 return 0;
3389         return ret;
3390  nla_put_failure:
3391         return -ENOBUFS;
3392 }
3393
3394
3395 static int i802_sta_set_flags(void *priv, const u8 *addr,
3396                               int total_flags, int flags_or, int flags_and)
3397 {
3398         struct wpa_driver_nl80211_data *drv = priv;
3399         struct nl_msg *msg, *flags = NULL;
3400
3401         msg = nlmsg_alloc();
3402         if (!msg)
3403                 return -ENOMEM;
3404
3405         flags = nlmsg_alloc();
3406         if (!flags) {
3407                 nlmsg_free(msg);
3408                 return -ENOMEM;
3409         }
3410
3411         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3412                     0, NL80211_CMD_SET_STATION, 0);
3413
3414         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3415                     if_nametoindex(drv->ifname));
3416         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3417
3418         if (total_flags & WLAN_STA_AUTHORIZED)
3419                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3420
3421         if (total_flags & WLAN_STA_WMM)
3422                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3423
3424         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3425                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3426
3427         if (total_flags & WLAN_STA_MFP)
3428                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3429
3430         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3431                 goto nla_put_failure;
3432
3433         nlmsg_free(flags);
3434
3435         return send_and_recv_msgs(drv, msg, NULL, NULL);
3436  nla_put_failure:
3437         nlmsg_free(flags);
3438         return -ENOBUFS;
3439 }
3440
3441
3442 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3443                                     int cw_min, int cw_max, int burst_time)
3444 {
3445         struct wpa_driver_nl80211_data *drv = priv;
3446         struct nl_msg *msg;
3447         struct nlattr *txq, *params;
3448
3449         msg = nlmsg_alloc();
3450         if (!msg)
3451                 return -1;
3452
3453         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3454                     0, NL80211_CMD_SET_WIPHY, 0);
3455
3456         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3457
3458         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3459         if (!txq)
3460                 goto nla_put_failure;
3461
3462         /* We are only sending parameters for a single TXQ at a time */
3463         params = nla_nest_start(msg, 1);
3464         if (!params)
3465                 goto nla_put_failure;
3466
3467         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3468         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3469          * 32 usec, so need to convert the value here. */
3470         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3471         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3472         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3473         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3474
3475         nla_nest_end(msg, params);
3476
3477         nla_nest_end(msg, txq);
3478
3479         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3480                 return 0;
3481  nla_put_failure:
3482         return -1;
3483 }
3484
3485
3486 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3487 {
3488         struct wpa_driver_nl80211_data *drv = priv;
3489         int ifidx;
3490         struct i802_bss *bss;
3491
3492         bss = os_zalloc(sizeof(*bss));
3493         if (bss == NULL)
3494                 return -1;
3495         bss->ifindex = if_nametoindex(ifname);
3496
3497         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3498         if (ifidx < 0) {
3499                 os_free(bss);
3500                 return -1;
3501         }
3502         if (hostapd_set_iface_flags(priv, ifname, 1)) {
3503                 nl80211_remove_iface(priv, ifidx);
3504                 os_free(bss);
3505                 return -1;
3506         }
3507         bss->next = drv->bss.next;
3508         drv->bss.next = bss;
3509         return 0;
3510 }
3511
3512
3513 static int i802_bss_remove(void *priv, const char *ifname)
3514 {
3515         struct wpa_driver_nl80211_data *drv = priv;
3516         struct i802_bss *bss, *prev;
3517         int ifindex = if_nametoindex(ifname);
3518         nl80211_remove_iface(priv, ifindex);
3519         prev = &drv->bss;
3520         bss = drv->bss.next;
3521         while (bss) {
3522                 if (ifindex == bss->ifindex) {
3523                         prev->next = bss->next;
3524                         os_free(bss);
3525                         break;
3526                 }
3527                 prev = bss;
3528                 bss = bss->next;
3529         }
3530         return 0;
3531 }
3532
3533
3534 static int i802_set_beacon(const char *iface, void *priv,
3535                            const u8 *head, size_t head_len,
3536                            const u8 *tail, size_t tail_len, int dtim_period)
3537 {
3538         return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3539                                                    head, head_len,
3540                                                    tail, tail_len,
3541                                                    dtim_period);
3542 }
3543
3544
3545 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3546 {
3547         struct nl_msg *msg;
3548
3549         msg = nlmsg_alloc();
3550         if (!msg)
3551                 return -ENOMEM;
3552
3553         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3554                     0, NL80211_CMD_DEL_BEACON, 0);
3555         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3556
3557         return send_and_recv_msgs(drv, msg, NULL, NULL);
3558  nla_put_failure:
3559         return -ENOBUFS;
3560 }
3561
3562
3563 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3564 {
3565         struct wpa_driver_nl80211_data *drv = priv;
3566         struct nl_msg *msg;
3567
3568         msg = nlmsg_alloc();
3569         if (!msg)
3570                 return -ENOMEM;
3571
3572         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3573                     NL80211_CMD_SET_BSS, 0);
3574
3575         if (cts >= 0)
3576                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3577         if (preamble >= 0)
3578                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3579         if (slot >= 0)
3580                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3581
3582         /* TODO: multi-BSS support */
3583         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3584
3585         return send_and_recv_msgs(drv, msg, NULL, NULL);
3586  nla_put_failure:
3587         return -ENOBUFS;
3588 }
3589
3590
3591 static int i802_set_cts_protect(void *priv, int value)
3592 {
3593         return i802_set_bss(priv, value, -1, -1);
3594 }
3595
3596
3597 static int i802_set_preamble(void *priv, int value)
3598 {
3599         return i802_set_bss(priv, -1, value, -1);
3600 }
3601
3602
3603 static int i802_set_short_slot_time(void *priv, int value)
3604 {
3605         return i802_set_bss(priv, -1, -1, value);
3606 }
3607
3608
3609 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3610 {
3611         switch (type) {
3612         case HOSTAPD_IF_VLAN:
3613                 return NL80211_IFTYPE_AP_VLAN;
3614         case HOSTAPD_IF_WDS:
3615                 return NL80211_IFTYPE_WDS;
3616         }
3617         return -1;
3618 }
3619
3620
3621 static int i802_if_add(const char *iface, void *priv,
3622                        enum hostapd_driver_if_type type, char *ifname,
3623                        const u8 *addr)
3624 {
3625         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3626                 return -1;
3627         return 0;
3628 }
3629
3630
3631 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3632                           char *ifname, const u8 *addr)
3633 {
3634         /* unused at the moment */
3635         return -1;
3636 }
3637
3638
3639 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3640                           const char *ifname, const u8 *addr)
3641 {
3642         nl80211_remove_iface(priv, if_nametoindex(ifname));
3643         return 0;
3644 }
3645
3646
3647 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3648                              const char *ifname, int vlan_id)
3649 {
3650         struct wpa_driver_nl80211_data *drv = priv;
3651         struct nl_msg *msg;
3652
3653         msg = nlmsg_alloc();
3654         if (!msg)
3655                 return -ENOMEM;
3656
3657         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3658                     0, NL80211_CMD_SET_STATION, 0);
3659
3660         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3661                     if_nametoindex(drv->ifname));
3662         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3663         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3664                     if_nametoindex(ifname));
3665
3666         return send_and_recv_msgs(drv, msg, NULL, NULL);
3667  nla_put_failure:
3668         return -ENOBUFS;
3669 }
3670
3671
3672 static void handle_frame(struct wpa_driver_nl80211_data *drv,
3673                          u8 *buf, size_t len,
3674                          struct hostapd_frame_info *hfi,
3675                          enum ieee80211_msg_type msg_type)
3676 {
3677         struct hostapd_iface *iface = drv->hapd->iface;
3678         struct ieee80211_hdr *hdr;
3679         u16 fc, type, stype;
3680         size_t data_len = len;
3681         struct hostapd_data *hapd = NULL;
3682         int broadcast_bssid = 0;
3683         size_t i;
3684         u8 *bssid;
3685
3686         /*
3687          * PS-Poll frames are 16 bytes. All other frames are
3688          * 24 bytes or longer.
3689          */
3690         if (len < 16)
3691                 return;
3692
3693         hdr = (struct ieee80211_hdr *) buf;
3694         fc = le_to_host16(hdr->frame_control);
3695
3696         type = WLAN_FC_GET_TYPE(fc);
3697         stype = WLAN_FC_GET_STYPE(fc);
3698
3699         switch (type) {
3700         case WLAN_FC_TYPE_DATA:
3701                 if (len < 24)
3702                         return;
3703                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
3704                 case WLAN_FC_TODS:
3705                         bssid = hdr->addr1;
3706                         break;
3707                 case WLAN_FC_FROMDS:
3708                         bssid = hdr->addr2;
3709                         break;
3710                 default:
3711                         /* discard */
3712                         return;
3713                 }
3714                 break;
3715         case WLAN_FC_TYPE_CTRL:
3716                 /* discard non-ps-poll frames */
3717                 if (stype != WLAN_FC_STYPE_PSPOLL)
3718                         return;
3719                 bssid = hdr->addr1;
3720                 break;
3721         case WLAN_FC_TYPE_MGMT:
3722                 bssid = hdr->addr3;
3723                 break;
3724         default:
3725                 /* discard */
3726                 return;
3727         }
3728
3729         /* find interface frame belongs to */
3730         for (i = 0; i < iface->num_bss; i++) {
3731                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
3732                         hapd = iface->bss[i];
3733                         break;
3734                 }
3735         }
3736
3737         if (hapd == NULL) {
3738                 hapd = iface->bss[0];
3739
3740                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
3741                     bssid[2] != 0xff || bssid[3] != 0xff ||
3742                     bssid[4] != 0xff || bssid[5] != 0xff) {
3743                         /*
3744                          * Unknown BSSID - drop frame if this is not from
3745                          * passive scanning or a beacon (at least ProbeReq
3746                          * frames to other APs may be allowed through RX
3747                          * filtering in the wlan hw/driver)
3748                          */
3749                         if ((type != WLAN_FC_TYPE_MGMT ||
3750                              stype != WLAN_FC_STYPE_BEACON))
3751                                 return;
3752                 } else
3753                         broadcast_bssid = 1;
3754         }
3755
3756         switch (msg_type) {
3757         case ieee80211_msg_normal:
3758                 /* continue processing */
3759                 break;
3760         case ieee80211_msg_tx_callback_ack:
3761                 handle_tx_callback(hapd, buf, data_len, 1);
3762                 return;
3763         case ieee80211_msg_tx_callback_fail:
3764                 handle_tx_callback(hapd, buf, data_len, 0);
3765                 return;
3766         }
3767
3768         switch (type) {
3769         case WLAN_FC_TYPE_MGMT:
3770                 if (stype != WLAN_FC_STYPE_BEACON &&
3771                     stype != WLAN_FC_STYPE_PROBE_REQ)
3772                         wpa_printf(MSG_MSGDUMP, "MGMT");
3773                 if (broadcast_bssid) {
3774                         for (i = 0; i < iface->num_bss; i++)
3775                                 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
3776                                                 stype, hfi);
3777                 } else
3778                         hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
3779                 break;
3780         case WLAN_FC_TYPE_CTRL:
3781                 /* can only get here with PS-Poll frames */
3782                 wpa_printf(MSG_DEBUG, "CTRL");
3783                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3784                 break;
3785         case WLAN_FC_TYPE_DATA:
3786                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
3787                 break;
3788         }
3789 }
3790
3791
3792 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3793 {
3794         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3795         struct sockaddr_ll lladdr;
3796         unsigned char buf[3000];
3797         int len;
3798         socklen_t fromlen = sizeof(lladdr);
3799
3800         len = recvfrom(sock, buf, sizeof(buf), 0,
3801                        (struct sockaddr *)&lladdr, &fromlen);
3802         if (len < 0) {
3803                 perror("recv");
3804                 return;
3805         }
3806
3807         if (have_ifidx(drv, lladdr.sll_ifindex)) {
3808                 struct hostapd_data *hapd;
3809                 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
3810                 if (!hapd)
3811                         return;
3812                 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
3813         }
3814 }
3815
3816
3817 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
3818                             int mode)
3819 {
3820         struct nl_msg *msg;
3821         int ret = -ENOBUFS;
3822
3823         msg = nlmsg_alloc();
3824         if (!msg)
3825                 return -ENOMEM;
3826
3827         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3828                     0, NL80211_CMD_SET_INTERFACE, 0);
3829         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3830                     if_nametoindex(ifname));
3831         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3832
3833         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3834         if (!ret)
3835                 return 0;
3836  nla_put_failure:
3837         wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
3838                    "mode.", ifname);
3839         return ret;
3840 }
3841
3842
3843 #ifdef CONFIG_IEEE80211N
3844 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
3845                               int freq, u8 *ie, size_t ie_len)
3846 {
3847         struct ieee802_11_elems elems;
3848         int ht, pri_chan = 0, sec_chan = 0;
3849         struct ieee80211_ht_operation *oper;
3850         struct hostapd_neighbor_bss *nnei;
3851
3852         ieee802_11_parse_elems(ie, ie_len, &elems, 0);
3853         ht = elems.ht_capabilities || elems.ht_operation;
3854         if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
3855                 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
3856                 pri_chan = oper->control_chan;
3857                 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
3858                         if (oper->ht_param &
3859                             HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
3860                                 sec_chan = pri_chan + 4;
3861                         else if (oper->ht_param &
3862                             HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
3863                                 sec_chan = pri_chan - 4;
3864                 }
3865         }
3866
3867         wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
3868                    " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
3869                    MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
3870
3871         nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
3872                           sizeof(struct hostapd_neighbor_bss));
3873         if (nnei == NULL)
3874                 return;
3875         drv->neighbors = nnei;
3876         nnei = &nnei[drv->num_neighbors];
3877         os_memcpy(nnei->bssid, bssid, ETH_ALEN);
3878         nnei->freq = freq;
3879         nnei->ht = !!ht;
3880         nnei->pri_chan = pri_chan;
3881         nnei->sec_chan = sec_chan;
3882         drv->num_neighbors++;
3883 }
3884
3885
3886 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
3887 {
3888         int divi = 1000000, i;
3889
3890         if (iwe->u.freq.e == 0) {
3891                 /*
3892                  * Some drivers do not report frequency, but a channel.
3893                  * Try to map this to frequency by assuming they are using
3894                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
3895                  * frequency if the driver sends both frequency and channel,
3896                  * since the driver may be sending an A-band channel that we
3897                  * don't handle here.
3898                  */
3899
3900                 if (*freq)
3901                         return 0;
3902
3903                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
3904                         *freq = 2407 + 5 * iwe->u.freq.m;
3905                         return 0;
3906                 } else if (iwe->u.freq.m == 14) {
3907                         *freq = 2484;
3908                         return 0;
3909                 }
3910         }
3911
3912         if (iwe->u.freq.e > 6) {
3913                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
3914                            "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
3915                 return -1;
3916         }
3917
3918         for (i = 0; i < iwe->u.freq.e; i++)
3919                 divi /= 10;
3920         *freq = iwe->u.freq.m / divi;
3921         return 0;
3922 }
3923
3924
3925 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
3926                            size_t len)
3927 {
3928         size_t ap_num = 0;
3929         int first;
3930         struct iw_event iwe_buf, *iwe = &iwe_buf;
3931         char *pos, *end, *custom;
3932         u8 bssid[ETH_ALEN];
3933         int freq = 0;
3934         u8 *ie = NULL;
3935         size_t ie_len = 0;
3936
3937         ap_num = 0;
3938         first = 1;
3939
3940         pos = (char *) res_buf;
3941         end = (char *) res_buf + len;
3942
3943         while (pos + IW_EV_LCP_LEN <= end) {
3944                 /* Event data may be unaligned, so make a local, aligned copy
3945                  * before processing. */
3946                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
3947                 if (iwe->len <= IW_EV_LCP_LEN)
3948                         break;
3949
3950                 custom = pos + IW_EV_POINT_LEN;
3951                 if (iwe->cmd == IWEVGENIE) {
3952                         /* WE-19 removed the pointer from struct iw_point */
3953                         char *dpos = (char *) &iwe_buf.u.data.length;
3954                         int dlen = dpos - (char *) &iwe_buf;
3955                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
3956                                   sizeof(struct iw_event) - dlen);
3957                 } else {
3958                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
3959                         custom += IW_EV_POINT_OFF;
3960                 }
3961
3962                 switch (iwe->cmd) {
3963                 case SIOCGIWAP:
3964                         if (!first)
3965                                 i802_add_neighbor(drv, bssid, freq, ie,
3966                                                   ie_len);
3967                         first = 0;
3968                         os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
3969                         freq = 0;
3970                         ie = NULL;
3971                         ie_len = 0;
3972                         break;
3973                 case SIOCGIWFREQ:
3974                         i802_get_scan_freq(iwe, &freq);
3975                         break;
3976                 case IWEVGENIE:
3977                         if (custom + iwe->u.data.length > end) {
3978                                 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
3979                                 return -1;
3980                         }
3981                         ie = (u8 *) custom;
3982                         ie_len = iwe->u.data.length;
3983                         break;
3984                 }
3985
3986                 pos += iwe->len;
3987         }
3988
3989         if (!first)
3990                 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
3991
3992         return 0;
3993 }
3994
3995
3996 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
3997 {
3998         struct iwreq iwr;
3999         u8 *res_buf;
4000         size_t res_buf_len;
4001         int res;
4002
4003         res_buf_len = IW_SCAN_MAX_DATA;
4004         for (;;) {
4005                 res_buf = os_malloc(res_buf_len);
4006                 if (res_buf == NULL)
4007                         return -1;
4008                 os_memset(&iwr, 0, sizeof(iwr));
4009                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4010                 iwr.u.data.pointer = res_buf;
4011                 iwr.u.data.length = res_buf_len;
4012
4013                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
4014                         break;
4015
4016                 if (errno == E2BIG && res_buf_len < 65535) {
4017                         os_free(res_buf);
4018                         res_buf = NULL;
4019                         res_buf_len *= 2;
4020                         if (res_buf_len > 65535)
4021                                 res_buf_len = 65535; /* 16-bit length field */
4022                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
4023                                    "trying larger buffer (%lu bytes)",
4024                                    (unsigned long) res_buf_len);
4025                 } else {
4026                         perror("ioctl[SIOCGIWSCAN]");
4027                         os_free(res_buf);
4028                         return -1;
4029                 }
4030         }
4031
4032         if (iwr.u.data.length > res_buf_len) {
4033                 os_free(res_buf);
4034                 return -1;
4035         }
4036
4037         res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
4038         os_free(res_buf);
4039
4040         return res;
4041 }
4042
4043
4044 static int i802_is_event_wireless_scan_complete(char *data, int len)
4045 {
4046         struct iw_event iwe_buf, *iwe = &iwe_buf;
4047         char *pos, *end;
4048
4049         pos = data;
4050         end = data + len;
4051
4052         while (pos + IW_EV_LCP_LEN <= end) {
4053                 /* Event data may be unaligned, so make a local, aligned copy
4054                  * before processing. */
4055                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4056                 if (iwe->cmd == SIOCGIWSCAN)
4057                         return 1;
4058
4059                 pos += iwe->len;
4060         }
4061
4062         return 0;
4063 }
4064
4065
4066 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4067 {
4068         struct ifinfomsg *ifi;
4069         int attrlen, _nlmsg_len, rta_len;
4070         struct rtattr *attr;
4071
4072         if (len < (int) sizeof(*ifi))
4073                 return 0;
4074
4075         ifi = NLMSG_DATA(h);
4076
4077         if (ifindex != ifi->ifi_index)
4078                 return 0; /* event for foreign ifindex */
4079
4080         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4081
4082         attrlen = h->nlmsg_len - _nlmsg_len;
4083         if (attrlen < 0)
4084                 return 0;
4085
4086         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4087
4088         rta_len = RTA_ALIGN(sizeof(struct rtattr));
4089         while (RTA_OK(attr, attrlen)) {
4090                 if (attr->rta_type == IFLA_WIRELESS &&
4091                     i802_is_event_wireless_scan_complete(
4092                             ((char *) attr) + rta_len,
4093                             attr->rta_len - rta_len))
4094                         return 1;
4095                 attr = RTA_NEXT(attr, attrlen);
4096         }
4097
4098         return 0;
4099 }
4100
4101
4102 static int i802_is_scan_complete(int s, int ifindex)
4103 {
4104         char buf[1024];
4105         int left;
4106         struct nlmsghdr *h;
4107
4108         left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4109         if (left < 0) {
4110                 perror("recv(netlink)");
4111                 return 0;
4112         }
4113
4114         h = (struct nlmsghdr *) buf;
4115         while (left >= (int) sizeof(*h)) {
4116                 int len, plen;
4117
4118                 len = h->nlmsg_len;
4119                 plen = len - sizeof(*h);
4120                 if (len > left || plen < 0) {
4121                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4122                                    "len=%d left=%d plen=%d",
4123                                    len, left, plen);
4124                         break;
4125                 }
4126
4127                 switch (h->nlmsg_type) {
4128                 case RTM_NEWLINK:
4129                         if (i802_is_rtm_scan_complete(ifindex, h, plen))
4130                                 return 1;
4131                         break;
4132                 }
4133
4134                 len = NLMSG_ALIGN(len);
4135                 left -= len;
4136                 h = (struct nlmsghdr *) ((char *) h + len);
4137         }
4138
4139         return 0;
4140 }
4141
4142
4143 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4144 {
4145         struct iwreq iwr;
4146         int s, res, ifindex;
4147         struct sockaddr_nl local;
4148         time_t now, end;
4149         fd_set rfds;
4150         struct timeval tv;
4151
4152         wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4153                    "starting HT 20/40 MHz BSS");
4154
4155         /* Request a new scan */
4156         /* TODO: would be enough to scan the selected band */
4157         os_memset(&iwr, 0, sizeof(iwr));
4158         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4159         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4160                 perror("ioctl[SIOCSIWSCAN]");
4161                 return -1;
4162         }
4163
4164         ifindex = if_nametoindex(drv->ifname);
4165
4166         /* Wait for scan completion event or timeout */
4167         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4168         if (s < 0) {
4169                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4170                 return -1;
4171         }
4172
4173         os_memset(&local, 0, sizeof(local));
4174         local.nl_family = AF_NETLINK;
4175         local.nl_groups = RTMGRP_LINK;
4176         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
4177                 perror("bind(netlink)");
4178                 close(s);
4179                 return -1;
4180         }
4181
4182         time(&end);
4183         end += 30; /* Wait at most 30 seconds for scan results */
4184         for (;;) {
4185                 time(&now);
4186                 tv.tv_sec = end > now ? end - now : 0;
4187                 tv.tv_usec = 0;
4188                 FD_ZERO(&rfds);
4189                 FD_SET(s, &rfds);
4190                 res = select(s + 1, &rfds, NULL, NULL, &tv);
4191                 if (res < 0) {
4192                         perror("select");
4193                         /* Assume results are ready after 10 seconds wait */
4194                         os_sleep(10, 0);
4195                         break;
4196                 } else if (res) {
4197                         if (i802_is_scan_complete(s, ifindex)) {
4198                                 wpa_printf(MSG_DEBUG, "nl80211: Scan "
4199                                            "completed");
4200                                 break;
4201                         }
4202                 } else {
4203                         wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
4204                         /* Assume results are ready to be read now */
4205                         break;
4206                 }
4207         }
4208
4209         close(s);
4210
4211         return i802_get_ht_scan_res(drv);
4212 }
4213 #endif /* CONFIG_IEEE80211N */
4214
4215
4216 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
4217 {
4218         struct ifreq ifr;
4219         int ret;
4220
4221         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
4222         if (drv->ioctl_sock < 0) {
4223                 perror("socket[PF_INET,SOCK_DGRAM]");
4224                 return -1;
4225         }
4226
4227         /* start listening for EAPOL on the default AP interface */
4228         add_ifidx(drv, if_nametoindex(drv->ifname));
4229
4230         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4231                 return -1;
4232
4233         if (bssid) {
4234                 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
4235                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
4236                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
4237
4238                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
4239                         perror("ioctl(SIOCSIFHWADDR)");
4240                         return -1;
4241                 }
4242         }
4243
4244         /*
4245          * initialise generic netlink and nl80211
4246          */
4247         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
4248         if (!drv->nl_cb) {
4249                 printf("Failed to allocate netlink callbacks.\n");
4250                 return -1;
4251         }
4252
4253         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
4254         if (!drv->nl_handle) {
4255                 printf("Failed to allocate netlink handle.\n");
4256                 return -1;
4257         }
4258
4259         if (genl_connect(drv->nl_handle)) {
4260                 printf("Failed to connect to generic netlink.\n");
4261                 return -1;
4262         }
4263
4264 #ifdef CONFIG_LIBNL20
4265         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
4266                 printf("Failed to allocate generic netlink cache.\n");
4267                 return -1;
4268         }
4269 #else /* CONFIG_LIBNL20 */
4270         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
4271         if (!drv->nl_cache) {
4272                 printf("Failed to allocate generic netlink cache.\n");
4273                 return -1;
4274         }
4275 #endif /* CONFIG_LIBNL20 */
4276
4277         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
4278         if (!drv->nl80211) {
4279                 printf("nl80211 not found.\n");
4280                 return -1;
4281         }
4282
4283         ret = nl_get_multicast_id(drv, "nl80211", "scan");
4284         if (ret >= 0)
4285                 ret = nl_socket_add_membership(drv->nl_handle, ret);
4286         if (ret < 0) {
4287                 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4288                            "membership for scan events: %d (%s)",
4289                            ret, strerror(-ret));
4290         }
4291
4292         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
4293         if (ret >= 0)
4294                 ret = nl_socket_add_membership(drv->nl_handle, ret);
4295         if (ret < 0) {
4296                 wpa_printf(MSG_DEBUG, "nl80211: Could not add multicast "
4297                            "membership for mlme events: %d (%s)",
4298                            ret, strerror(-ret));
4299         }
4300
4301         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
4302                                  wpa_driver_nl80211_event_receive, drv,
4303                                  drv->hapd);
4304
4305 #ifdef CONFIG_IEEE80211N
4306         if (drv->ht_40mhz_scan) {
4307                 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
4308                     || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
4309                     i802_ht_scan(drv) ||
4310                     hostapd_set_iface_flags(drv, drv->ifname, 0)) {
4311                         wpa_printf(MSG_ERROR, "Failed to scan channels for "
4312                                    "HT 40 MHz operations");
4313                         return -1;
4314                 }
4315         }
4316 #endif /* CONFIG_IEEE80211N */
4317
4318         /* Initialise a monitor interface */
4319         if (nl80211_create_monitor_interface(drv))
4320                 return -1;
4321
4322         if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
4323                 goto fail1;
4324
4325         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4326                 goto fail1;
4327
4328         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4329         if (drv->eapol_sock < 0) {
4330                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4331                 goto fail1;
4332         }
4333
4334         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4335         {
4336                 printf("Could not register read socket for eapol\n");
4337                 return -1;
4338         }
4339
4340         memset(&ifr, 0, sizeof(ifr));
4341         os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
4342         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
4343                 perror("ioctl(SIOCGIFHWADDR)");
4344                 goto fail1;
4345         }
4346
4347         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
4348                 printf("Invalid HW-addr family 0x%04x\n",
4349                        ifr.ifr_hwaddr.sa_family);
4350                 goto fail1;
4351         }
4352         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
4353
4354         return 0;
4355
4356 fail1:
4357         nl80211_remove_iface(drv, drv->monitor_ifidx);
4358         return -1;
4359 }
4360
4361
4362 static int i802_get_inact_sec(void *priv, const u8 *addr)
4363 {
4364         struct hostap_sta_driver_data data;
4365         int ret;
4366
4367         data.inactive_msec = (unsigned long) -1;
4368         ret = i802_read_sta_data(priv, &data, addr);
4369         if (ret || data.inactive_msec == (unsigned long) -1)
4370                 return -1;
4371         return data.inactive_msec / 1000;
4372 }
4373
4374
4375 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4376 {
4377 #if 0
4378         /* TODO */
4379 #endif
4380         return 0;
4381 }
4382
4383
4384 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
4385 {
4386         struct wpa_driver_nl80211_data *drv = priv;
4387         struct ieee80211_mgmt mgmt;
4388
4389         memset(&mgmt, 0, sizeof(mgmt));
4390         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4391                                           WLAN_FC_STYPE_DEAUTH);
4392         memcpy(mgmt.da, addr, ETH_ALEN);
4393         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4394         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4395         mgmt.u.deauth.reason_code = host_to_le16(reason);
4396         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4397                                             IEEE80211_HDRLEN +
4398                                             sizeof(mgmt.u.deauth));
4399 }
4400
4401
4402 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
4403 {
4404         struct wpa_driver_nl80211_data *drv = priv;
4405         struct ieee80211_mgmt mgmt;
4406
4407         memset(&mgmt, 0, sizeof(mgmt));
4408         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4409                                           WLAN_FC_STYPE_DISASSOC);
4410         memcpy(mgmt.da, addr, ETH_ALEN);
4411         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
4412         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
4413         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4414         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4415                                             IEEE80211_HDRLEN +
4416                                             sizeof(mgmt.u.disassoc));
4417 }
4418
4419
4420 static const struct hostapd_neighbor_bss *
4421 i802_get_neighbor_bss(void *priv, size_t *num)
4422 {
4423         struct wpa_driver_nl80211_data *drv = priv;
4424         *num = drv->num_neighbors;
4425         return drv->neighbors;
4426 }
4427
4428
4429 static void *i802_init(struct hostapd_data *hapd,
4430                        struct wpa_init_params *params)
4431 {
4432         struct wpa_driver_nl80211_data *drv;
4433         size_t i;
4434
4435         drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
4436         if (drv == NULL) {
4437                 printf("Could not allocate memory for i802 driver data\n");
4438                 return NULL;
4439         }
4440
4441         drv->hapd = hapd;
4442         memcpy(drv->ifname, params->ifname, sizeof(drv->ifname));
4443         drv->ifindex = if_nametoindex(drv->ifname);
4444         drv->bss.ifindex = drv->ifindex;
4445
4446         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4447         drv->if_indices = drv->default_if_indices;
4448         for (i = 0; i < params->num_bridge; i++) {
4449                 if (params->bridge[i])
4450                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4451         }
4452         drv->ht_40mhz_scan = params->ht_40mhz_scan;
4453
4454         if (i802_init_sockets(drv, params->bssid))
4455                 goto failed;
4456
4457         return drv;
4458
4459 failed:
4460         free(drv);
4461         return NULL;
4462 }
4463
4464
4465 static void i802_deinit(void *priv)
4466 {
4467         struct wpa_driver_nl80211_data *drv = priv;
4468         struct i802_bss *bss, *prev;
4469
4470         if (drv->last_freq_ht) {
4471                 /* Clear HT flags from the driver */
4472                 struct hostapd_freq_params freq;
4473                 os_memset(&freq, 0, sizeof(freq));
4474                 freq.freq = drv->last_freq;
4475                 i802_set_freq(priv, &freq);
4476         }
4477
4478         i802_del_beacon(drv);
4479
4480         /* remove monitor interface */
4481         nl80211_remove_iface(drv, drv->monitor_ifidx);
4482
4483         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
4484
4485         if (drv->monitor_sock >= 0) {
4486                 eloop_unregister_read_sock(drv->monitor_sock);
4487                 close(drv->monitor_sock);
4488         }
4489         if (drv->ioctl_sock >= 0)
4490                 close(drv->ioctl_sock);
4491         if (drv->eapol_sock >= 0) {
4492                 eloop_unregister_read_sock(drv->eapol_sock);
4493                 close(drv->eapol_sock);
4494         }
4495
4496         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
4497         genl_family_put(drv->nl80211);
4498         nl_cache_free(drv->nl_cache);
4499         nl_handle_destroy(drv->nl_handle);
4500         nl_cb_put(drv->nl_cb);
4501
4502         if (drv->if_indices != drv->default_if_indices)
4503                 free(drv->if_indices);
4504
4505         os_free(drv->neighbors);
4506
4507         bss = drv->bss.next;
4508         while (bss) {
4509                 prev = bss;
4510                 bss = bss->next;
4511                 os_free(bss);
4512         }
4513
4514         free(drv);
4515 }
4516
4517 #endif /* HOSTAPD */
4518
4519
4520 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4521         .name = "nl80211",
4522         .desc = "Linux nl80211/cfg80211",
4523         .get_bssid = wpa_driver_nl80211_get_bssid,
4524         .get_ssid = wpa_driver_nl80211_get_ssid,
4525         .set_key = wpa_driver_nl80211_set_key,
4526         .scan2 = wpa_driver_nl80211_scan,
4527         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4528         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4529         .disassociate = wpa_driver_nl80211_disassociate,
4530         .authenticate = wpa_driver_nl80211_authenticate,
4531         .associate = wpa_driver_nl80211_associate,
4532         .init = wpa_driver_nl80211_init,
4533         .deinit = wpa_driver_nl80211_deinit,
4534         .get_capa = wpa_driver_nl80211_get_capa,
4535         .set_operstate = wpa_driver_nl80211_set_operstate,
4536         .set_country = wpa_driver_nl80211_set_country,
4537 #ifdef CONFIG_AP
4538         .set_beacon = wpa_driver_nl80211_set_beacon,
4539 #endif /* CONFIG_AP */
4540 #if defined(CONFIG_AP) || defined(HOSTAPD)
4541         .send_mlme = wpa_driver_nl80211_send_mlme,
4542         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4543         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4544 #endif /* CONFIG_AP || HOSTAPD */
4545 #ifdef HOSTAPD
4546         .hapd_init = i802_init,
4547         .hapd_deinit = i802_deinit,
4548         .hapd_set_key = i802_set_key,
4549         .get_seqnum = i802_get_seqnum,
4550         .flush = i802_flush,
4551         .read_sta_data = i802_read_sta_data,
4552         .hapd_send_eapol = i802_send_eapol,
4553         .sta_set_flags = i802_sta_set_flags,
4554         .sta_deauth = i802_sta_deauth,
4555         .sta_disassoc = i802_sta_disassoc,
4556         .sta_remove = i802_sta_remove,
4557         .sta_add = i802_sta_add,
4558         .get_inact_sec = i802_get_inact_sec,
4559         .sta_clear_stats = i802_sta_clear_stats,
4560         .set_freq = i802_set_freq,
4561         .set_rts = i802_set_rts,
4562         .set_frag = i802_set_frag,
4563         .set_retry = i802_set_retry,
4564         .set_rate_sets = i802_set_rate_sets,
4565         .hapd_set_beacon = i802_set_beacon,
4566         .set_cts_protect = i802_set_cts_protect,
4567         .set_preamble = i802_set_preamble,
4568         .set_short_slot_time = i802_set_short_slot_time,
4569         .set_tx_queue_params = i802_set_tx_queue_params,
4570         .bss_add = i802_bss_add,
4571         .bss_remove = i802_bss_remove,
4572         .if_add = i802_if_add,
4573         .if_update = i802_if_update,
4574         .if_remove = i802_if_remove,
4575         .set_sta_vlan = i802_set_sta_vlan,
4576         .get_neighbor_bss = i802_get_neighbor_bss,
4577 #endif /* HOSTAPD */
4578 };