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 <net/if.h>
  23 #include <netlink/genl/genl.h>
  24 #include <netlink/genl/family.h>
  25 #include <netlink/genl/ctrl.h>
  26 #include "nl80211_copy.h"
  27 #ifndef NO_WEXT
  28 #include "wireless_copy.h"
  29 #endif /* NO_WEXT */
  30
  31 #include "common.h"
  32 #include "driver.h"
  33 #include "eloop.h"
  34 #include "ieee802_11_defs.h"
  35
  36 #if defined(CONFIG_AP) || defined(HOSTAPD)
  37 #include <netpacket/packet.h>
  38 #include <linux/filter.h>
  39 #include "radiotap.h"
  40 #include "radiotap_iter.h"
  41
  42 #include "../../hostapd/hostapd_defs.h"
  43 #endif /* CONFIG_AP || HOSTAPD */
  44
  45 #ifdef HOSTAPD
  46 #include "../../hostapd/sta_flags.h"
  47 #include "ieee802_11_common.h"
  48
  49 #ifdef CONFIG_LIBNL20
  50 /* libnl 2.0 compatibility code */
  51 #define nl_handle_alloc_cb nl_socket_alloc_cb
  52 #define nl_handle_destroy nl_socket_free
  53 #endif /* CONFIG_LIBNL20 */
  54
  55 #endif /* HOSTAPD */
  56
  57
  58 #ifndef IFF_LOWER_UP
  59 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  60 #endif
  61 #ifndef IFF_DORMANT
  62 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  63 #endif
  64
  65 #ifndef IF_OPER_DORMANT
  66 #define IF_OPER_DORMANT 5
  67 #endif
  68 #ifndef IF_OPER_UP
  69 #define IF_OPER_UP 6
  70 #endif
  71
  72 struct i802_bss {
  73         struct i802_bss *next;
  74         int ifindex;
  75         unsigned int beacon_set:1;
  76 };
  77
  78 struct wpa_driver_nl80211_data {
  79         void *ctx;
  80         int link_event_sock;
  81         int ioctl_sock; /* socket for ioctl() use */
  82         char ifname[IFNAMSIZ + 1];
  83         int ifindex;
  84         int if_removed;
  85         struct wpa_driver_capa capa;
  86         int has_capability;
  87
  88         int operstate;
  89
  90         int scan_complete_events;
  91
  92         struct nl_handle *nl_handle;
  93         struct nl_cache *nl_cache;
  94         struct nl_cb *nl_cb;
  95         struct genl_family *nl80211;
  96
  97         u8 bssid[ETH_ALEN];
  98         int associated;
  99         u8 ssid[32];
 100         size_t ssid_len;
 101         int nlmode;
 102         int ap_scan_as_station;
 103
 104         int beacon_int;
 105         int monitor_sock;
 106         int monitor_ifidx;
 107
 108 #ifdef CONFIG_AP
 109         unsigned int beacon_set:1;
 110 #endif /* CONFIG_AP */
 111
 112 #ifdef HOSTAPD
 113         int eapol_sock; /* socket for EAPOL frames */
 114
 115         int default_if_indices[16];
 116         int *if_indices;
 117         int num_if_indices;
 118
 119         struct i802_bss bss;
 120
 121         int last_freq;
 122         int last_freq_ht;
 123 #endif /* HOSTAPD */
 124 };
 125
 126
 127 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 128                                             void *timeout_ctx);
 129 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 130 static int
 131 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 132
 133 #ifdef CONFIG_AP
 134 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 135                                  int ifidx);
 136 #endif /* CONFIG_AP */
 137
 138 #ifdef HOSTAPD
 139 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 140 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 141 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 142                                  int ifindex);
 143 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 144                                  int ifidx);
 145 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 146 #endif /* HOSTAPD */
 147
 148
 149 /* nl80211 code */
 150 static int ack_handler(struct nl_msg *msg, void *arg)
 151 {
 152         int *err = arg;
 153         *err = 0;
 154         return NL_STOP;
 155 }
 156
 157 static int finish_handler(struct nl_msg *msg, void *arg)
 158 {
 159         int *ret = arg;
 160         *ret = 0;
 161         return NL_SKIP;
 162 }
 163
 164 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 165                          void *arg)
 166 {
 167         int *ret = arg;
 168         *ret = err->error;
 169         return NL_SKIP;
 170 }
 171
 172
 173 static int no_seq_check(struct nl_msg *msg, void *arg)
 174 {
 175         return NL_OK;
 176 }
 177
 178
 179 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 180                               struct nl_msg *msg,
 181                               int (*valid_handler)(struct nl_msg *, void *),
 182                               void *valid_data)
 183 {
 184         struct nl_cb *cb;
 185         int err = -ENOMEM;
 186
 187         cb = nl_cb_clone(drv->nl_cb);
 188         if (!cb)
 189                 goto out;
 190
 191         err = nl_send_auto_complete(drv->nl_handle, msg);
 192         if (err < 0)
 193                 goto out;
 194
 195         err = 1;
 196
 197         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 198         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 199         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 200
 201         if (valid_handler)
 202                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 203                           valid_handler, valid_data);
 204
 205         while (err > 0)
 206                 nl_recvmsgs(drv->nl_handle, cb);
 207  out:
 208         nl_cb_put(cb);
 209         nlmsg_free(msg);
 210         return err;
 211 }
 212
 213
 214 struct family_data {
 215         const char *group;
 216         int id;
 217 };
 218
 219
 220 static int family_handler(struct nl_msg *msg, void *arg)
 221 {
 222         struct family_data *res = arg;
 223         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 224         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 225         struct nlattr *mcgrp;
 226         int i;
 227
 228         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 229                   genlmsg_attrlen(gnlh, 0), NULL);
 230         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 231                 return NL_SKIP;
 232
 233         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 234                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 235                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 236                           nla_len(mcgrp), NULL);
 237                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 238                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 239                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 240                                res->group,
 241                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 242                         continue;
 243                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 244                 break;
 245         };
 246
 247         return NL_SKIP;
 248 }
 249
 250
 251 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 252                                const char *family, const char *group)
 253 {
 254         struct nl_msg *msg;
 255         int ret = -1;
 256         struct family_data res = { group, -ENOENT };
 257
 258         msg = nlmsg_alloc();
 259         if (!msg)
 260                 return -ENOMEM;
 261         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 262                     0, 0, CTRL_CMD_GETFAMILY, 0);
 263         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 264
 265         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 266         msg = NULL;
 267         if (ret == 0)
 268                 ret = res.id;
 269
 270 nla_put_failure:
 271         nlmsg_free(msg);
 272         return ret;
 273 }
 274
 275
 276 #ifdef HOSTAPD
 277 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 278                         const char *ifname, u8 *addr)
 279 {
 280         struct ifreq ifr;
 281
 282         os_memset(&ifr, 0, sizeof(ifr));
 283         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 284         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 285                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 286                            ifname, errno, strerror(errno));
 287                 return -1;
 288         }
 289
 290         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 291                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 292                            ifname, ifr.ifr_hwaddr.sa_family);
 293                 return -1;
 294         }
 295         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 296
 297         return 0;
 298 }
 299
 300
 301 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 302                         const char *ifname, const u8 *addr)
 303 {
 304         struct ifreq ifr;
 305
 306         os_memset(&ifr, 0, sizeof(ifr));
 307         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 308         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 309         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 310
 311         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 312                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 313                            ifname, errno, strerror(errno));
 314                 return -1;
 315         }
 316
 317         return 0;
 318 }
 319 #endif /* HOSTAPD */
 320
 321
 322 #ifndef HOSTAPD
 323
 324 static int wpa_driver_nl80211_send_oper_ifla(
 325         struct wpa_driver_nl80211_data *drv,
 326         int linkmode, int operstate)
 327 {
 328         struct {
 329                 struct nlmsghdr hdr;
 330                 struct ifinfomsg ifinfo;
 331                 char opts[16];
 332         } req;
 333         struct rtattr *rta;
 334         static int nl_seq;
 335         ssize_t ret;
 336
 337         os_memset(&req, 0, sizeof(req));
 338
 339         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 340         req.hdr.nlmsg_type = RTM_SETLINK;
 341         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 342         req.hdr.nlmsg_seq = ++nl_seq;
 343         req.hdr.nlmsg_pid = 0;
 344
 345         req.ifinfo.ifi_family = AF_UNSPEC;
 346         req.ifinfo.ifi_type = 0;
 347         req.ifinfo.ifi_index = drv->ifindex;
 348         req.ifinfo.ifi_flags = 0;
 349         req.ifinfo.ifi_change = 0;
 350
 351         if (linkmode != -1) {
 352                 rta = (struct rtattr *)
 353                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 354                 rta->rta_type = IFLA_LINKMODE;
 355                 rta->rta_len = RTA_LENGTH(sizeof(char));
 356                 *((char *) RTA_DATA(rta)) = linkmode;
 357                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 358                         RTA_LENGTH(sizeof(char));
 359         }
 360         if (operstate != -1) {
 361                 rta = (struct rtattr *)
 362                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 363                 rta->rta_type = IFLA_OPERSTATE;
 364                 rta->rta_len = RTA_LENGTH(sizeof(char));
 365                 *((char *) RTA_DATA(rta)) = operstate;
 366                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 367                         RTA_LENGTH(sizeof(char));
 368         }
 369
 370         wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
 371                    linkmode, operstate);
 372
 373         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 374         if (ret < 0) {
 375                 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
 376                            " %s (assume operstate is not supported)",
 377                            strerror(errno));
 378         }
 379
 380         return ret < 0 ? -1 : 0;
 381 }
 382
 383
 384 #ifndef NO_WEXT
 385 static int wpa_driver_nl80211_set_auth_param(
 386         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 387 {
 388         struct iwreq iwr;
 389         int ret = 0;
 390
 391         os_memset(&iwr, 0, sizeof(iwr));
 392         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 393         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 394         iwr.u.param.value = value;
 395
 396         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 397                 if (errno != EOPNOTSUPP) {
 398                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 399                                    "value 0x%x) failed: %s)",
 400                                    idx, value, strerror(errno));
 401                 }
 402                 ret = errno == EOPNOTSUPP ? -2 : -1;
 403         }
 404
 405         return ret;
 406 }
 407 #endif /* NO_WEXT */
 408
 409
 410 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 411 {
 412         struct wpa_driver_nl80211_data *drv = priv;
 413         if (!drv->associated)
 414                 return -1;
 415         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 416         return 0;
 417 }
 418
 419
 420 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 421 {
 422         struct wpa_driver_nl80211_data *drv = priv;
 423         if (!drv->associated)
 424                 return -1;
 425         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 426         return drv->ssid_len;
 427 }
 428
 429
 430 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 431                                           void *ctx, char *buf, size_t len,
 432                                           int del)
 433 {
 434         union wpa_event_data event;
 435
 436         os_memset(&event, 0, sizeof(event));
 437         if (len > sizeof(event.interface_status.ifname))
 438                 len = sizeof(event.interface_status.ifname) - 1;
 439         os_memcpy(event.interface_status.ifname, buf, len);
 440         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 441                 EVENT_INTERFACE_ADDED;
 442
 443         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 444                    del ? "DEL" : "NEW",
 445                    event.interface_status.ifname,
 446                    del ? "removed" : "added");
 447
 448         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 449                 if (del)
 450                         drv->if_removed = 1;
 451                 else
 452                         drv->if_removed = 0;
 453         }
 454
 455         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 456 }
 457
 458
 459 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 460                                          struct nlmsghdr *h)
 461 {
 462         struct ifinfomsg *ifi;
 463         int attrlen, _nlmsg_len, rta_len;
 464         struct rtattr *attr;
 465
 466         ifi = NLMSG_DATA(h);
 467
 468         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 469
 470         attrlen = h->nlmsg_len - _nlmsg_len;
 471         if (attrlen < 0)
 472                 return 0;
 473
 474         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 475
 476         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 477         while (RTA_OK(attr, attrlen)) {
 478                 if (attr->rta_type == IFLA_IFNAME) {
 479                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 480                             == 0)
 481                                 return 1;
 482                         else
 483                                 break;
 484                 }
 485                 attr = RTA_NEXT(attr, attrlen);
 486         }
 487
 488         return 0;
 489 }
 490
 491
 492 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 493                                           int ifindex, struct nlmsghdr *h)
 494 {
 495         if (drv->ifindex == ifindex)
 496                 return 1;
 497
 498         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 499                 drv->ifindex = if_nametoindex(drv->ifname);
 500                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 501                            "interface");
 502                 wpa_driver_nl80211_finish_drv_init(drv);
 503                 return 1;
 504         }
 505
 506         return 0;
 507 }
 508
 509
 510 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 511                                               void *ctx, struct nlmsghdr *h,
 512                                               size_t len)
 513 {
 514         struct ifinfomsg *ifi;
 515         int attrlen, _nlmsg_len, rta_len;
 516         struct rtattr * attr;
 517
 518         if (len < sizeof(*ifi))
 519                 return;
 520
 521         ifi = NLMSG_DATA(h);
 522
 523         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 524                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 525                            ifi->ifi_index);
 526                 return;
 527         }
 528
 529         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 530                    "(%s%s%s%s)",
 531                    drv->operstate, ifi->ifi_flags,
 532                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 533                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 534                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 535                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 536         /*
 537          * Some drivers send the association event before the operup event--in
 538          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 539          * fails. This will hit us when wpa_supplicant does not need to do
 540          * IEEE 802.1X authentication
 541          */
 542         if (drv->operstate == 1 &&
 543             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 544             !(ifi->ifi_flags & IFF_RUNNING))
 545                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 546
 547         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 548
 549         attrlen = h->nlmsg_len - _nlmsg_len;
 550         if (attrlen < 0)
 551                 return;
 552
 553         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 554
 555         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 556         while (RTA_OK(attr, attrlen)) {
 557                 if (attr->rta_type == IFLA_IFNAME) {
 558                         wpa_driver_nl80211_event_link(
 559                                 drv, ctx,
 560                                 ((char *) attr) + rta_len,
 561                                 attr->rta_len - rta_len, 0);
 562                 }
 563                 attr = RTA_NEXT(attr, attrlen);
 564         }
 565 }
 566
 567
 568 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 569                                               void *ctx, struct nlmsghdr *h,
 570                                               size_t len)
 571 {
 572         struct ifinfomsg *ifi;
 573         int attrlen, _nlmsg_len, rta_len;
 574         struct rtattr * attr;
 575
 576         if (len < sizeof(*ifi))
 577                 return;
 578
 579         ifi = NLMSG_DATA(h);
 580
 581         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 582
 583         attrlen = h->nlmsg_len - _nlmsg_len;
 584         if (attrlen < 0)
 585                 return;
 586
 587         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 588
 589         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 590         while (RTA_OK(attr, attrlen)) {
 591                 if (attr->rta_type == IFLA_IFNAME) {
 592                         wpa_driver_nl80211_event_link(
 593                                 drv, ctx,
 594                                 ((char *) attr) + rta_len,
 595                                 attr->rta_len - rta_len, 1);
 596                 }
 597                 attr = RTA_NEXT(attr, attrlen);
 598         }
 599 }
 600
 601
 602 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 603                                                   void *sock_ctx)
 604 {
 605         char buf[8192];
 606         int left;
 607         struct sockaddr_nl from;
 608         socklen_t fromlen;
 609         struct nlmsghdr *h;
 610         int max_events = 10;
 611
 612 try_again:
 613         fromlen = sizeof(from);
 614         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 615                         (struct sockaddr *) &from, &fromlen);
 616         if (left < 0) {
 617                 if (errno != EINTR && errno != EAGAIN)
 618                         perror("recvfrom(netlink)");
 619                 return;
 620         }
 621
 622         h = (struct nlmsghdr *) buf;
 623         while (left >= (int) sizeof(*h)) {
 624                 int len, plen;
 625
 626                 len = h->nlmsg_len;
 627                 plen = len - sizeof(*h);
 628                 if (len > left || plen < 0) {
 629                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 630                                    "len=%d left=%d plen=%d",
 631                                    len, left, plen);
 632                         break;
 633                 }
 634
 635                 switch (h->nlmsg_type) {
 636                 case RTM_NEWLINK:
 637                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 638                                                           h, plen);
 639                         break;
 640                 case RTM_DELLINK:
 641                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 642                                                           h, plen);
 643                         break;
 644                 }
 645
 646                 len = NLMSG_ALIGN(len);
 647                 left -= len;
 648                 h = (struct nlmsghdr *) ((char *) h + len);
 649         }
 650
 651         if (left > 0) {
 652                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 653                            "message", left);
 654         }
 655
 656         if (--max_events > 0) {
 657                 /*
 658                  * Try to receive all events in one eloop call in order to
 659                  * limit race condition on cases where AssocInfo event, Assoc
 660                  * event, and EAPOL frames are received more or less at the
 661                  * same time. We want to process the event messages first
 662                  * before starting EAPOL processing.
 663                  */
 664                 goto try_again;
 665         }
 666 }
 667
 668
 669 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 670                             const u8 *frame, size_t len)
 671 {
 672         const struct ieee80211_mgmt *mgmt;
 673         union wpa_event_data event;
 674
 675         mgmt = (const struct ieee80211_mgmt *) frame;
 676         if (len < 24 + sizeof(mgmt->u.auth)) {
 677                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 678                            "frame");
 679                 return;
 680         }
 681
 682         os_memset(&event, 0, sizeof(event));
 683         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 684         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 685         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 686         if (len > 24 + sizeof(mgmt->u.auth)) {
 687                 event.auth.ies = mgmt->u.auth.variable;
 688                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 689         }
 690
 691         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 692 }
 693
 694
 695 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 696                             const u8 *frame, size_t len)
 697 {
 698         const struct ieee80211_mgmt *mgmt;
 699         union wpa_event_data event;
 700         u16 status;
 701
 702         mgmt = (const struct ieee80211_mgmt *) frame;
 703         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 704                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 705                            "frame");
 706                 return;
 707         }
 708
 709         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 710         if (status != WLAN_STATUS_SUCCESS) {
 711                 os_memset(&event, 0, sizeof(event));
 712                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 713                         event.assoc_reject.resp_ies =
 714                                 (u8 *) mgmt->u.assoc_resp.variable;
 715                         event.assoc_reject.resp_ies_len =
 716                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 717                 }
 718                 event.assoc_reject.status_code = status;
 719
 720                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 721                 return;
 722         }
 723
 724         drv->associated = 1;
 725         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 726
 727         os_memset(&event, 0, sizeof(event));
 728         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 729                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 730                 event.assoc_info.resp_ies_len =
 731                         len - 24 - sizeof(mgmt->u.assoc_resp);
 732         }
 733
 734         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 735 }
 736
 737
 738 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 739                        enum nl80211_commands cmd, struct nlattr *frame)
 740 {
 741         if (frame == NULL) {
 742                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 743                            "data", cmd);
 744                 return;
 745         }
 746
 747         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 748         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 749                     nla_data(frame), nla_len(frame));
 750
 751         switch (cmd) {
 752         case NL80211_CMD_AUTHENTICATE:
 753                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 754                 break;
 755         case NL80211_CMD_ASSOCIATE:
 756                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 757                 break;
 758         case NL80211_CMD_DEAUTHENTICATE:
 759                 drv->associated = 0;
 760                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 761                 break;
 762         case NL80211_CMD_DISASSOCIATE:
 763                 drv->associated = 0;
 764                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 765                 break;
 766         default:
 767                 break;
 768         }
 769 }
 770
 771 #endif /* HOSTAPD */
 772
 773
 774 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 775                                            struct nlattr *tb[])
 776 {
 777         union wpa_event_data data;
 778
 779         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 780         os_memset(&data, 0, sizeof(data));
 781         if (tb[NL80211_ATTR_MAC]) {
 782                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 783                             nla_data(tb[NL80211_ATTR_MAC]),
 784                             nla_len(tb[NL80211_ATTR_MAC]));
 785                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 786         }
 787         if (tb[NL80211_ATTR_KEY_SEQ]) {
 788                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 789                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 790                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 791         }
 792         if (tb[NL80211_ATTR_KEY_TYPE]) {
 793                 enum nl80211_key_type key_type =
 794                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 795                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 796                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 797                         data.michael_mic_failure.unicast = 1;
 798         } else
 799                 data.michael_mic_failure.unicast = 1;
 800
 801         if (tb[NL80211_ATTR_KEY_IDX]) {
 802                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 803                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 804         }
 805
 806         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 807 }
 808
 809
 810 static int process_event(struct nl_msg *msg, void *arg)
 811 {
 812         struct wpa_driver_nl80211_data *drv = arg;
 813         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 814         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 815
 816         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 817                   genlmsg_attrlen(gnlh, 0), NULL);
 818
 819         if (tb[NL80211_ATTR_IFINDEX]) {
 820                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 821                 if (ifindex != drv->ifindex) {
 822                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 823                                    " for foreign interface (ifindex %d)",
 824                                    gnlh->cmd, ifindex);
 825                         return NL_SKIP;
 826                 }
 827         }
 828
 829         if (drv->ap_scan_as_station &&
 830             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 831              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 832                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 833                 drv->ap_scan_as_station = 0;
 834         }
 835
 836         switch (gnlh->cmd) {
 837         case NL80211_CMD_NEW_SCAN_RESULTS:
 838                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 839                 drv->scan_complete_events = 1;
 840                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 841                                      drv->ctx);
 842                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 843                 break;
 844         case NL80211_CMD_SCAN_ABORTED:
 845                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 846                 /*
 847                  * Need to indicate that scan results are available in order
 848                  * not to make wpa_supplicant stop its scanning.
 849                  */
 850                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 851                                      drv->ctx);
 852                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 853                 break;
 854 #ifndef HOSTAPD
 855         case NL80211_CMD_AUTHENTICATE:
 856         case NL80211_CMD_ASSOCIATE:
 857         case NL80211_CMD_DEAUTHENTICATE:
 858         case NL80211_CMD_DISASSOCIATE:
 859                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
 860                 break;
 861 #endif /* HOSTAPD */
 862         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 863                 mlme_event_michael_mic_failure(drv, tb);
 864                 break;
 865         default:
 866                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 867                            "(cmd=%d)", gnlh->cmd);
 868                 break;
 869         }
 870
 871         return NL_SKIP;
 872 }
 873
 874
 875 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 876                                              void *sock_ctx)
 877 {
 878         struct nl_cb *cb;
 879         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 880
 881         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 882
 883         cb = nl_cb_clone(drv->nl_cb);
 884         if (!cb)
 885                 return;
 886         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 887         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 888         nl_recvmsgs(drv->nl_handle, cb);
 889         nl_cb_put(cb);
 890 }
 891
 892
 893 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 894                                    const char *ifname, int dev_up)
 895 {
 896         struct ifreq ifr;
 897
 898         if (drv->ioctl_sock < 0)
 899                 return -1;
 900
 901         os_memset(&ifr, 0, sizeof(ifr));
 902         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 903
 904         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 905                 perror("ioctl[SIOCGIFFLAGS]");
 906                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 907                            ifname);
 908                 return -1;
 909         }
 910
 911         if (dev_up) {
 912                 if (ifr.ifr_flags & IFF_UP)
 913                         return 0;
 914                 ifr.ifr_flags |= IFF_UP;
 915         } else {
 916                 if (!(ifr.ifr_flags & IFF_UP))
 917                         return 0;
 918                 ifr.ifr_flags &= ~IFF_UP;
 919         }
 920
 921         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 922                 perror("ioctl[SIOCSIFFLAGS]");
 923                 return -1;
 924         }
 925
 926         return 0;
 927 }
 928
 929
 930 /**
 931  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 932  * @priv: driver_nl80211 private data
 933  * @alpha2_arg: country to which to switch to
 934  * Returns: 0 on success, -1 on failure
 935  *
 936  * This asks nl80211 to set the regulatory domain for given
 937  * country ISO / IEC alpha2.
 938  */
 939 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 940 {
 941         struct wpa_driver_nl80211_data *drv = priv;
 942         char alpha2[3];
 943         struct nl_msg *msg;
 944
 945         msg = nlmsg_alloc();
 946         if (!msg)
 947                 return -ENOMEM;
 948
 949         alpha2[0] = alpha2_arg[0];
 950         alpha2[1] = alpha2_arg[1];
 951         alpha2[2] = '\0';
 952
 953         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 954                     0, NL80211_CMD_REQ_SET_REG, 0);
 955
 956         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 957         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 958                 return -EINVAL;
 959         return 0;
 960 nla_put_failure:
 961         return -EINVAL;
 962 }
 963
 964
 965 #ifndef HOSTAPD
 966 struct wiphy_info_data {
 967         int max_scan_ssids;
 968         int ap_supported;
 969 };
 970
 971
 972 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 973 {
 974         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 975         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 976         struct wiphy_info_data *info = arg;
 977
 978         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 979                   genlmsg_attrlen(gnlh, 0), NULL);
 980
 981         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 982                 info->max_scan_ssids =
 983                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 984
 985         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 986                 struct nlattr *nl_mode;
 987                 int i;
 988                 nla_for_each_nested(nl_mode,
 989                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 990                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 991                                 info->ap_supported = 1;
 992                                 break;
 993                         }
 994                 }
 995         }
 996
 997         return NL_SKIP;
 998 }
 999
1000
1001 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1002                                        struct wiphy_info_data *info)
1003 {
1004         struct nl_msg *msg;
1005
1006         os_memset(info, 0, sizeof(*info));
1007         msg = nlmsg_alloc();
1008         if (!msg)
1009                 return -1;
1010
1011         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1012                     0, NL80211_CMD_GET_WIPHY, 0);
1013
1014         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1015
1016         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1017                 return 0;
1018         msg = NULL;
1019 nla_put_failure:
1020         nlmsg_free(msg);
1021         return -1;
1022 }
1023
1024
1025 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1026 {
1027         struct wiphy_info_data info;
1028         if (wpa_driver_nl80211_get_info(drv, &info))
1029                 return;
1030         drv->has_capability = 1;
1031         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1032         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1033                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1034                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1035                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1036         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1037                 WPA_DRIVER_CAPA_ENC_WEP104 |
1038                 WPA_DRIVER_CAPA_ENC_TKIP |
1039                 WPA_DRIVER_CAPA_ENC_CCMP;
1040
1041         drv->capa.max_scan_ssids = info.max_scan_ssids;
1042         if (info.ap_supported)
1043                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1044 }
1045 #endif /* HOSTAPD */
1046
1047
1048 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1049                                       void *ctx)
1050 {
1051         int ret;
1052
1053         /* Initialize generic netlink and nl80211 */
1054
1055         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1056         if (drv->nl_cb == NULL) {
1057                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1058                            "callbacks");
1059                 goto err1;
1060         }
1061
1062         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1063         if (drv->nl_handle == NULL) {
1064                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1065                            "callbacks");
1066                 goto err2;
1067         }
1068
1069         if (genl_connect(drv->nl_handle)) {
1070                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1071                            "netlink");
1072                 goto err3;
1073         }
1074
1075 #ifdef CONFIG_LIBNL20
1076         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1077                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1078                            "netlink cache");
1079                 goto err3;
1080         }
1081 #else /* CONFIG_LIBNL20 */
1082         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1083         if (drv->nl_cache == NULL) {
1084                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1085                            "netlink cache");
1086                 goto err3;
1087         }
1088 #endif /* CONFIG_LIBNL20 */
1089
1090
1091         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1092         if (drv->nl80211 == NULL) {
1093                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1094                            "found");
1095                 goto err4;
1096         }
1097
1098         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1099         if (ret >= 0)
1100                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1101         if (ret < 0) {
1102                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1103                            "membership for scan events: %d (%s)",
1104                            ret, strerror(-ret));
1105                 goto err4;
1106         }
1107
1108         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1109         if (ret >= 0)
1110                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1111         if (ret < 0) {
1112                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1113                            "membership for mlme events: %d (%s)",
1114                            ret, strerror(-ret));
1115                 goto err4;
1116         }
1117
1118         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1119                                  wpa_driver_nl80211_event_receive, drv, ctx);
1120
1121         return 0;
1122
1123 err4:
1124         nl_cache_free(drv->nl_cache);
1125 err3:
1126         nl_handle_destroy(drv->nl_handle);
1127 err2:
1128         nl_cb_put(drv->nl_cb);
1129 err1:
1130         return -1;
1131 }
1132
1133
1134 static int wpa_driver_nl80211_init_link_events(
1135         struct wpa_driver_nl80211_data *drv)
1136 {
1137 #ifdef HOSTAPD
1138         return 0;
1139 #else /* HOSTAPD */
1140         int s;
1141         struct sockaddr_nl local;
1142
1143         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1144         if (s < 0) {
1145                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1146                 return -1;
1147         }
1148
1149         os_memset(&local, 0, sizeof(local));
1150         local.nl_family = AF_NETLINK;
1151         local.nl_groups = RTMGRP_LINK;
1152         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1153                 perror("bind(netlink)");
1154                 close(s);
1155                 return -1;
1156         }
1157
1158         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1159                                  drv->ctx);
1160         drv->link_event_sock = s;
1161
1162         return 0;
1163 #endif /* HOSTAPD */
1164 }
1165
1166
1167 /**
1168  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1169  * @ctx: context to be used when calling wpa_supplicant functions,
1170  * e.g., wpa_supplicant_event()
1171  * @ifname: interface name, e.g., wlan0
1172  * Returns: Pointer to private data, %NULL on failure
1173  */
1174 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1175 {
1176         struct wpa_driver_nl80211_data *drv;
1177
1178         drv = os_zalloc(sizeof(*drv));
1179         if (drv == NULL)
1180                 return NULL;
1181         drv->ctx = ctx;
1182         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1183         drv->monitor_ifidx = -1;
1184         drv->monitor_sock = -1;
1185         drv->link_event_sock = -1;
1186         drv->ioctl_sock = -1;
1187
1188         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1189                 os_free(drv);
1190                 return NULL;
1191         }
1192
1193         drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1194
1195         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1196         if (drv->ioctl_sock < 0) {
1197                 perror("socket(PF_INET,SOCK_DGRAM)");
1198                 goto failed;
1199         }
1200
1201         if (wpa_driver_nl80211_init_link_events(drv) ||
1202             wpa_driver_nl80211_finish_drv_init(drv))
1203                 goto failed;
1204
1205         return drv;
1206
1207 failed:
1208         if (drv->link_event_sock >= 0) {
1209                 eloop_unregister_read_sock(drv->link_event_sock);
1210                 close(drv->link_event_sock);
1211         }
1212         if (drv->ioctl_sock >= 0)
1213                 close(drv->ioctl_sock);
1214
1215         genl_family_put(drv->nl80211);
1216         nl_cache_free(drv->nl_cache);
1217         nl_handle_destroy(drv->nl_handle);
1218         nl_cb_put(drv->nl_cb);
1219
1220         os_free(drv);
1221         return NULL;
1222 }
1223
1224
1225 static int
1226 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1227 {
1228         drv->ifindex = if_nametoindex(drv->ifname);
1229
1230 #ifndef HOSTAPD
1231         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1232                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1233                            "use managed mode");
1234         }
1235
1236         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1237                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1238                            "UP", drv->ifname);
1239                 return -1;
1240         }
1241
1242         wpa_driver_nl80211_capa(drv);
1243
1244         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1245 #endif /* HOSTAPD */
1246
1247         return 0;
1248 }
1249
1250
1251 #ifdef HOSTAPD
1252 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1253 {
1254         struct i802_bss *bss, *prev;
1255         bss = drv->bss.next;
1256         while (bss) {
1257                 prev = bss;
1258                 bss = bss->next;
1259                 os_free(bss);
1260         }
1261 }
1262 #endif /* HOSTAPD */
1263
1264
1265 #if defined(CONFIG_AP) || defined(HOSTAPD)
1266 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1267 {
1268         struct nl_msg *msg;
1269
1270         msg = nlmsg_alloc();
1271         if (!msg)
1272                 return -ENOMEM;
1273
1274         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1275                     0, NL80211_CMD_DEL_BEACON, 0);
1276         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1277
1278         return send_and_recv_msgs(drv, msg, NULL, NULL);
1279  nla_put_failure:
1280         return -ENOBUFS;
1281 }
1282 #endif /* CONFIG_AP || HOSTAPD */
1283
1284
1285 /**
1286  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1287  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1288  *
1289  * Shut down driver interface and processing of driver events. Free
1290  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1291  */
1292 static void wpa_driver_nl80211_deinit(void *priv)
1293 {
1294         struct wpa_driver_nl80211_data *drv = priv;
1295
1296 #if defined(CONFIG_AP) || defined(HOSTAPD)
1297         if (drv->monitor_ifidx >= 0)
1298                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1299         if (drv->monitor_sock >= 0) {
1300                 eloop_unregister_read_sock(drv->monitor_sock);
1301                 close(drv->monitor_sock);
1302         }
1303
1304         if (drv->nlmode == NL80211_IFTYPE_AP)
1305                 wpa_driver_nl80211_del_beacon(drv);
1306 #endif /* CONFIG_AP || HOSTAPD */
1307
1308 #ifdef HOSTAPD
1309         if (drv->last_freq_ht) {
1310                 /* Clear HT flags from the driver */
1311                 struct hostapd_freq_params freq;
1312                 os_memset(&freq, 0, sizeof(freq));
1313                 freq.freq = drv->last_freq;
1314                 i802_set_freq(priv, &freq);
1315         }
1316
1317         if (drv->eapol_sock >= 0) {
1318                 eloop_unregister_read_sock(drv->eapol_sock);
1319                 close(drv->eapol_sock);
1320         }
1321
1322         if (drv->if_indices != drv->default_if_indices)
1323                 os_free(drv->if_indices);
1324
1325         wpa_driver_nl80211_free_bss(drv);
1326 #else /* HOSTAPD */
1327 #ifndef NO_WEXT
1328         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1329 #endif /* NO_WEXT */
1330
1331         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1332
1333         if (drv->link_event_sock >= 0) {
1334                 eloop_unregister_read_sock(drv->link_event_sock);
1335                 close(drv->link_event_sock);
1336         }
1337 #endif /* HOSTAPD */
1338
1339         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1340
1341         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1342         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1343
1344         if (drv->ioctl_sock >= 0)
1345                 close(drv->ioctl_sock);
1346
1347         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1348         genl_family_put(drv->nl80211);
1349         nl_cache_free(drv->nl_cache);
1350         nl_handle_destroy(drv->nl_handle);
1351         nl_cb_put(drv->nl_cb);
1352
1353         os_free(drv);
1354 }
1355
1356
1357 /**
1358  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1359  * @eloop_ctx: Driver private data
1360  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1361  *
1362  * This function can be used as registered timeout when starting a scan to
1363  * generate a scan completed event if the driver does not report this.
1364  */
1365 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1366 {
1367         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1368         if (drv->ap_scan_as_station) {
1369                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1370                 drv->ap_scan_as_station = 0;
1371         }
1372         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1373         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1374 }
1375
1376
1377 /**
1378  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1379  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1380  * @params: Scan parameters
1381  * Returns: 0 on success, -1 on failure
1382  */
1383 static int wpa_driver_nl80211_scan(void *priv,
1384                                    struct wpa_driver_scan_params *params)
1385 {
1386         struct wpa_driver_nl80211_data *drv = priv;
1387         int ret = 0, timeout;
1388         struct nl_msg *msg, *ssids, *freqs;
1389         size_t i;
1390
1391         msg = nlmsg_alloc();
1392         ssids = nlmsg_alloc();
1393         freqs = nlmsg_alloc();
1394         if (!msg || !ssids || !freqs) {
1395                 nlmsg_free(msg);
1396                 nlmsg_free(ssids);
1397                 nlmsg_free(freqs);
1398                 return -1;
1399         }
1400
1401         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1402                     NL80211_CMD_TRIGGER_SCAN, 0);
1403
1404         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1405
1406         for (i = 0; i < params->num_ssids; i++) {
1407                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1408                         params->ssids[i].ssid);
1409         }
1410         if (params->num_ssids)
1411                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1412
1413         if (params->extra_ies) {
1414                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1415                         params->extra_ies);
1416         }
1417
1418         if (params->freqs) {
1419                 for (i = 0; params->freqs[i]; i++)
1420                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1421                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1422         }
1423
1424         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1425         msg = NULL;
1426         if (ret) {
1427                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1428                            "(%s)", ret, strerror(-ret));
1429 #ifdef HOSTAPD
1430                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1431                         /*
1432                          * mac80211 does not allow scan requests in AP mode, so
1433                          * try to do this in station mode.
1434                          */
1435                         if (wpa_driver_nl80211_set_mode(drv,
1436                                                         IEEE80211_MODE_INFRA))
1437                                 goto nla_put_failure;
1438
1439                         if (wpa_driver_nl80211_scan(drv, params)) {
1440                                 wpa_driver_nl80211_set_mode(drv,
1441                                                             IEEE80211_MODE_AP);
1442                                 goto nla_put_failure;
1443                         }
1444
1445                         /* Restore AP mode when processing scan results */
1446                         drv->ap_scan_as_station = 1;
1447                         ret = 0;
1448                 } else
1449                         goto nla_put_failure;
1450 #else /* HOSTAPD */
1451                 goto nla_put_failure;
1452 #endif /* HOSTAPD */
1453         }
1454
1455         /* Not all drivers generate "scan completed" wireless event, so try to
1456          * read results after a timeout. */
1457         timeout = 10;
1458         if (drv->scan_complete_events) {
1459                 /*
1460                  * The driver seems to deliver events to notify when scan is
1461                  * complete, so use longer timeout to avoid race conditions
1462                  * with scanning and following association request.
1463                  */
1464                 timeout = 30;
1465         }
1466         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1467                    "seconds", ret, timeout);
1468         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1469         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1470                                drv, drv->ctx);
1471
1472 nla_put_failure:
1473         nlmsg_free(ssids);
1474         nlmsg_free(msg);
1475         nlmsg_free(freqs);
1476         return ret;
1477 }
1478
1479
1480 static int bss_info_handler(struct nl_msg *msg, void *arg)
1481 {
1482         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1483         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1484         struct nlattr *bss[NL80211_BSS_MAX + 1];
1485         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1486                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1487                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1488                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1489                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1490                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1491                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1492                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1493                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1494         };
1495         struct wpa_scan_results *res = arg;
1496         struct wpa_scan_res **tmp;
1497         struct wpa_scan_res *r;
1498         const u8 *ie;
1499         size_t ie_len;
1500
1501         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1502                   genlmsg_attrlen(gnlh, 0), NULL);
1503         if (!tb[NL80211_ATTR_BSS])
1504                 return NL_SKIP;
1505         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1506                              bss_policy))
1507                 return NL_SKIP;
1508         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1509                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1510                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1511         } else {
1512                 ie = NULL;
1513                 ie_len = 0;
1514         }
1515
1516         r = os_zalloc(sizeof(*r) + ie_len);
1517         if (r == NULL)
1518                 return NL_SKIP;
1519         if (bss[NL80211_BSS_BSSID])
1520                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1521                           ETH_ALEN);
1522         if (bss[NL80211_BSS_FREQUENCY])
1523                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1524         if (bss[NL80211_BSS_BEACON_INTERVAL])
1525                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1526         if (bss[NL80211_BSS_CAPABILITY])
1527                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1528         r->flags |= WPA_SCAN_NOISE_INVALID;
1529         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1530                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1531                 r->level /= 100; /* mBm to dBm */
1532                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1533         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1534                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1535                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1536         } else
1537                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1538         if (bss[NL80211_BSS_TSF])
1539                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1540         r->ie_len = ie_len;
1541         if (ie)
1542                 os_memcpy(r + 1, ie, ie_len);
1543
1544         tmp = os_realloc(res->res,
1545                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1546         if (tmp == NULL) {
1547                 os_free(r);
1548                 return NL_SKIP;
1549         }
1550         tmp[res->num++] = r;
1551         res->res = tmp;
1552
1553         return NL_SKIP;
1554 }
1555
1556
1557 /**
1558  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1559  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1560  * Returns: Scan results on success, -1 on failure
1561  */
1562 static struct wpa_scan_results *
1563 wpa_driver_nl80211_get_scan_results(void *priv)
1564 {
1565         struct wpa_driver_nl80211_data *drv = priv;
1566         struct nl_msg *msg;
1567         struct wpa_scan_results *res;
1568         int ret;
1569
1570         res = os_zalloc(sizeof(*res));
1571         if (res == NULL)
1572                 return 0;
1573         msg = nlmsg_alloc();
1574         if (!msg)
1575                 goto nla_put_failure;
1576
1577         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1578                     NL80211_CMD_GET_SCAN, 0);
1579         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1580
1581         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1582         msg = NULL;
1583         if (ret == 0) {
1584                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1585                            (unsigned long) res->num);
1586                 return res;
1587         }
1588         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1589                    "(%s)", ret, strerror(-ret));
1590 nla_put_failure:
1591         nlmsg_free(msg);
1592         wpa_scan_results_free(res);
1593         return NULL;
1594 }
1595
1596
1597 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1598                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1599                        const u8 *seq, size_t seq_len,
1600                        const u8 *key, size_t key_len)
1601 {
1602         struct nl_msg *msg;
1603         int ret;
1604
1605         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1606                    "set_tx=%d seq_len=%lu key_len=%lu",
1607                    __func__, ifindex, alg, addr, key_idx, set_tx,
1608                    (unsigned long) seq_len, (unsigned long) key_len);
1609
1610         msg = nlmsg_alloc();
1611         if (!msg)
1612                 return -ENOMEM;
1613
1614         if (alg == WPA_ALG_NONE) {
1615                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1616                             0, NL80211_CMD_DEL_KEY, 0);
1617         } else {
1618                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1619                             0, NL80211_CMD_NEW_KEY, 0);
1620                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1621                 switch (alg) {
1622                 case WPA_ALG_WEP:
1623                         if (key_len == 5)
1624                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1625                                             0x000FAC01);
1626                         else
1627                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1628                                             0x000FAC05);
1629                         break;
1630                 case WPA_ALG_TKIP:
1631                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1632                         break;
1633                 case WPA_ALG_CCMP:
1634                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1635                         break;
1636                 case WPA_ALG_IGTK:
1637                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1638                         break;
1639                 default:
1640                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1641                                    "algorithm %d", __func__, alg);
1642                         nlmsg_free(msg);
1643                         return -1;
1644                 }
1645         }
1646
1647         if (seq)
1648                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1649
1650         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1651         {
1652                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1653                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1654         }
1655         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1656         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1657
1658         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1659         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1660                 ret = 0;
1661         if (ret)
1662                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1663                            ret, strerror(-ret));
1664
1665         /*
1666          * If we failed or don't need to set the default TX key (below),
1667          * we're done here.
1668          */
1669         if (ret || !set_tx || alg == WPA_ALG_NONE)
1670                 return ret;
1671 #ifdef HOSTAPD /* FIX: is this needed? */
1672         if (addr)
1673                 return ret;
1674 #endif /* HOSTAPD */
1675
1676         msg = nlmsg_alloc();
1677         if (!msg)
1678                 return -ENOMEM;
1679
1680         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1681                     0, NL80211_CMD_SET_KEY, 0);
1682         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1683         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1684         if (alg == WPA_ALG_IGTK)
1685                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1686         else
1687                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1688
1689         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1690         if (ret == -ENOENT)
1691                 ret = 0;
1692         if (ret)
1693                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1694                            "err=%d %s)", ret, strerror(-ret));
1695         return ret;
1696
1697 nla_put_failure:
1698         return -ENOBUFS;
1699 }
1700
1701
1702 #ifndef HOSTAPD
1703
1704 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1705                                       const u8 *addr, int key_idx,
1706                                       int set_tx, const u8 *seq,
1707                                       size_t seq_len,
1708                                       const u8 *key, size_t key_len)
1709 {
1710         struct wpa_driver_nl80211_data *drv = priv;
1711         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1712                            seq_len, key, key_len);
1713 }
1714
1715
1716 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1717                                    const u8 *addr, int cmd, u16 reason_code)
1718 {
1719         int ret = -1;
1720         struct nl_msg *msg;
1721
1722         msg = nlmsg_alloc();
1723         if (!msg)
1724                 return -1;
1725
1726         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1727
1728         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1729         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1730         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1731
1732         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1733         msg = NULL;
1734         if (ret) {
1735                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1736                            "(%s)", ret, strerror(-ret));
1737                 goto nla_put_failure;
1738         }
1739         ret = 0;
1740
1741 nla_put_failure:
1742         nlmsg_free(msg);
1743         return ret;
1744 }
1745
1746
1747 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1748                                              int reason_code)
1749 {
1750         struct wpa_driver_nl80211_data *drv = priv;
1751         wpa_printf(MSG_DEBUG, "%s", __func__);
1752         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1753                                        reason_code);
1754 }
1755
1756
1757 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1758                                            int reason_code)
1759 {
1760         struct wpa_driver_nl80211_data *drv = priv;
1761         wpa_printf(MSG_DEBUG, "%s", __func__);
1762         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1763                                        reason_code);
1764 }
1765
1766
1767 static int wpa_driver_nl80211_authenticate(
1768         void *priv, struct wpa_driver_auth_params *params)
1769 {
1770         struct wpa_driver_nl80211_data *drv = priv;
1771         int ret = -1, i;
1772         struct nl_msg *msg;
1773         enum nl80211_auth_type type;
1774
1775         drv->associated = 0;
1776
1777         msg = nlmsg_alloc();
1778         if (!msg)
1779                 return -1;
1780
1781         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1782                    drv->ifindex);
1783
1784         for (i = 0; i < 4; i++) {
1785                 if (!params->wep_key[i])
1786                         continue;
1787                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1788                                            i == params->wep_tx_keyidx, NULL, 0,
1789                                            params->wep_key[i],
1790                                            params->wep_key_len[i]);
1791         }
1792
1793         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1794                     NL80211_CMD_AUTHENTICATE, 0);
1795
1796         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1797         if (params->bssid) {
1798                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1799                            MAC2STR(params->bssid));
1800                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1801         }
1802         if (params->freq) {
1803                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1804                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1805         }
1806         if (params->ssid) {
1807                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1808                                   params->ssid, params->ssid_len);
1809                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1810                         params->ssid);
1811         }
1812         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1813         if (params->ie)
1814                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1815         /*
1816          * TODO: if multiple auth_alg options enabled, try them one by one if
1817          * the AP rejects authentication due to unknown auth alg
1818          */
1819         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1820                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1821         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1822                 type = NL80211_AUTHTYPE_SHARED_KEY;
1823         else if (params->auth_alg & AUTH_ALG_LEAP)
1824                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1825         else if (params->auth_alg & AUTH_ALG_FT)
1826                 type = NL80211_AUTHTYPE_FT;
1827         else
1828                 goto nla_put_failure;
1829         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1830         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1831
1832         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1833         msg = NULL;
1834         if (ret) {
1835                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1836                            "(%s)", ret, strerror(-ret));
1837                 goto nla_put_failure;
1838         }
1839         ret = 0;
1840         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1841                    "successfully");
1842
1843 nla_put_failure:
1844         nlmsg_free(msg);
1845         return ret;
1846 }
1847
1848 #endif /* HOSTAPD */
1849
1850
1851 #if defined(CONFIG_AP) || defined(HOSTAPD)
1852
1853 struct phy_info_arg {
1854         u16 *num_modes;
1855         struct hostapd_hw_modes *modes;
1856 };
1857
1858 static int phy_info_handler(struct nl_msg *msg, void *arg)
1859 {
1860         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1861         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1862         struct phy_info_arg *phy_info = arg;
1863
1864         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1865
1866         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1867         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1868                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1869                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1870                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1871                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1872                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1873                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1874         };
1875
1876         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1877         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1878                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1879                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1880         };
1881
1882         struct nlattr *nl_band;
1883         struct nlattr *nl_freq;
1884         struct nlattr *nl_rate;
1885         int rem_band, rem_freq, rem_rate;
1886         struct hostapd_hw_modes *mode;
1887         int idx, mode_is_set;
1888
1889         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1890                   genlmsg_attrlen(gnlh, 0), NULL);
1891
1892         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1893                 return NL_SKIP;
1894
1895         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1896                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1897                 if (!mode)
1898                         return NL_SKIP;
1899                 phy_info->modes = mode;
1900
1901                 mode_is_set = 0;
1902
1903                 mode = &phy_info->modes[*(phy_info->num_modes)];
1904                 memset(mode, 0, sizeof(*mode));
1905                 *(phy_info->num_modes) += 1;
1906
1907                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1908                           nla_len(nl_band), NULL);
1909
1910                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1911                         mode->ht_capab = nla_get_u16(
1912                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1913                 }
1914
1915                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1916                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1917                                   nla_len(nl_freq), freq_policy);
1918                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1919                                 continue;
1920                         mode->num_channels++;
1921                 }
1922
1923                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1924                 if (!mode->channels)
1925                         return NL_SKIP;
1926
1927                 idx = 0;
1928
1929                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1930                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1931                                   nla_len(nl_freq), freq_policy);
1932                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1933                                 continue;
1934
1935                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1936                         mode->channels[idx].flag = 0;
1937
1938                         if (!mode_is_set) {
1939                                 /* crude heuristic */
1940                                 if (mode->channels[idx].freq < 4000)
1941                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1942                                 else
1943                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1944                                 mode_is_set = 1;
1945                         }
1946
1947                         /* crude heuristic */
1948                         if (mode->channels[idx].freq < 4000)
1949                                 if (mode->channels[idx].freq == 2484)
1950                                         mode->channels[idx].chan = 14;
1951                                 else
1952                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1953                         else
1954                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1955
1956                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1957                                 mode->channels[idx].flag |=
1958                                         HOSTAPD_CHAN_DISABLED;
1959                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1960                                 mode->channels[idx].flag |=
1961                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1962                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1963                                 mode->channels[idx].flag |=
1964                                         HOSTAPD_CHAN_NO_IBSS;
1965                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1966                                 mode->channels[idx].flag |=
1967                                         HOSTAPD_CHAN_RADAR;
1968
1969                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1970                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1971                                 mode->channels[idx].max_tx_power =
1972                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1973
1974                         idx++;
1975                 }
1976
1977                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1978                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1979                                   nla_len(nl_rate), rate_policy);
1980                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1981                                 continue;
1982                         mode->num_rates++;
1983                 }
1984
1985                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1986                 if (!mode->rates)
1987                         return NL_SKIP;
1988
1989                 idx = 0;
1990
1991                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1992                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1993                                   nla_len(nl_rate), rate_policy);
1994                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1995                                 continue;
1996                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1997
1998                         /* crude heuristic */
1999                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2000                             mode->rates[idx].rate > 200)
2001                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2002
2003                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2004                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
2005
2006                         idx++;
2007                 }
2008         }
2009
2010         return NL_SKIP;
2011 }
2012
2013 static struct hostapd_hw_modes *
2014 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2015 {
2016         u16 m;
2017         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2018         int i, mode11g_idx = -1;
2019
2020         /* If only 802.11g mode is included, use it to construct matching
2021          * 802.11b mode data. */
2022
2023         for (m = 0; m < *num_modes; m++) {
2024                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2025                         return modes; /* 802.11b already included */
2026                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2027                         mode11g_idx = m;
2028         }
2029
2030         if (mode11g_idx < 0)
2031                 return modes; /* 2.4 GHz band not supported at all */
2032
2033         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2034         if (nmodes == NULL)
2035                 return modes; /* Could not add 802.11b mode */
2036
2037         mode = &nmodes[*num_modes];
2038         os_memset(mode, 0, sizeof(*mode));
2039         (*num_modes)++;
2040         modes = nmodes;
2041
2042         mode->mode = HOSTAPD_MODE_IEEE80211B;
2043
2044         mode11g = &modes[mode11g_idx];
2045         mode->num_channels = mode11g->num_channels;
2046         mode->channels = os_malloc(mode11g->num_channels *
2047                                    sizeof(struct hostapd_channel_data));
2048         if (mode->channels == NULL) {
2049                 (*num_modes)--;
2050                 return modes; /* Could not add 802.11b mode */
2051         }
2052         os_memcpy(mode->channels, mode11g->channels,
2053                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2054
2055         mode->num_rates = 0;
2056         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2057         if (mode->rates == NULL) {
2058                 os_free(mode->channels);
2059                 (*num_modes)--;
2060                 return modes; /* Could not add 802.11b mode */
2061         }
2062
2063         for (i = 0; i < mode11g->num_rates; i++) {
2064                 if (mode11g->rates[i].rate > 110 ||
2065                     mode11g->rates[i].flags &
2066                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2067                         continue;
2068                 mode->rates[mode->num_rates] = mode11g->rates[i];
2069                 mode->num_rates++;
2070                 if (mode->num_rates == 4)
2071                         break;
2072         }
2073
2074         if (mode->num_rates == 0) {
2075                 os_free(mode->channels);
2076                 os_free(mode->rates);
2077                 (*num_modes)--;
2078                 return modes; /* No 802.11b rates */
2079         }
2080
2081         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2082                    "information");
2083
2084         return modes;
2085 }
2086
2087
2088 static struct hostapd_hw_modes *
2089 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2090 {
2091         struct wpa_driver_nl80211_data *drv = priv;
2092         struct nl_msg *msg;
2093         struct phy_info_arg result = {
2094                 .num_modes = num_modes,
2095                 .modes = NULL,
2096         };
2097
2098         *num_modes = 0;
2099         *flags = 0;
2100
2101         msg = nlmsg_alloc();
2102         if (!msg)
2103                 return NULL;
2104
2105         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2106                     0, NL80211_CMD_GET_WIPHY, 0);
2107
2108         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2109
2110         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2111                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2112  nla_put_failure:
2113         return NULL;
2114 }
2115
2116
2117 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2118                                          const void *data, size_t len,
2119                                          int encrypt)
2120 {
2121         __u8 rtap_hdr[] = {
2122                 0x00, 0x00, /* radiotap version */
2123                 0x0e, 0x00, /* radiotap length */
2124                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2125                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2126                 0x00,       /* padding */
2127                 0x00, 0x00, /* RX and TX flags to indicate that */
2128                 0x00, 0x00, /* this is the injected frame directly */
2129         };
2130         struct iovec iov[2] = {
2131                 {
2132                         .iov_base = &rtap_hdr,
2133                         .iov_len = sizeof(rtap_hdr),
2134                 },
2135                 {
2136                         .iov_base = (void *) data,
2137                         .iov_len = len,
2138                 }
2139         };
2140         struct msghdr msg = {
2141                 .msg_name = NULL,
2142                 .msg_namelen = 0,
2143                 .msg_iov = iov,
2144                 .msg_iovlen = 2,
2145                 .msg_control = NULL,
2146                 .msg_controllen = 0,
2147                 .msg_flags = 0,
2148         };
2149
2150         if (encrypt)
2151                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2152
2153         return sendmsg(drv->monitor_sock, &msg, 0);
2154 }
2155
2156
2157 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2158                                         size_t data_len)
2159 {
2160         struct wpa_driver_nl80211_data *drv = priv;
2161         struct ieee80211_mgmt *mgmt;
2162         int do_not_encrypt = 0;
2163         u16 fc;
2164
2165         mgmt = (struct ieee80211_mgmt *) data;
2166         fc = le_to_host16(mgmt->frame_control);
2167
2168         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2169             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2170                 /*
2171                  * Only one of the authentication frame types is encrypted.
2172                  * In order for static WEP encryption to work properly (i.e.,
2173                  * to not encrypt the frame), we need to tell mac80211 about
2174                  * the frames that must not be encrypted.
2175                  */
2176                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2177                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2178                 if (auth_alg == WLAN_AUTH_OPEN ||
2179                     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2180                         do_not_encrypt = 1;
2181         }
2182
2183         return wpa_driver_nl80211_send_frame(drv, data, data_len,
2184                                              !do_not_encrypt);
2185 }
2186
2187
2188 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2189                                                const u8 *head, size_t head_len,
2190                                                const u8 *tail, size_t tail_len,
2191                                                int dtim_period)
2192 {
2193         struct wpa_driver_nl80211_data *drv = priv;
2194         struct nl_msg *msg;
2195         u8 cmd = NL80211_CMD_NEW_BEACON;
2196         int ret;
2197         int beacon_set;
2198 #ifdef HOSTAPD
2199         struct i802_bss *bss;
2200
2201         bss = get_bss(drv, ifindex);
2202         if (bss == NULL)
2203                 return -ENOENT;
2204         beacon_set = bss->beacon_set;
2205 #else /* HOSTAPD */
2206         beacon_set = drv->beacon_set;
2207 #endif /* HOSTAPD */
2208
2209         msg = nlmsg_alloc();
2210         if (!msg)
2211                 return -ENOMEM;
2212
2213         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2214                    beacon_set);
2215         if (beacon_set)
2216                 cmd = NL80211_CMD_SET_BEACON;
2217
2218         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2219                     0, cmd, 0);
2220         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2221         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2222         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2223         if (!drv->beacon_int)
2224                 drv->beacon_int = 100;
2225         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2226         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2227
2228         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2229         if (ret) {
2230                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2231                            ret, strerror(-ret));
2232         } else {
2233 #ifdef HOSTAPD
2234                 bss->beacon_set = 1;
2235 #else /* HOSTAPD */
2236                 drv->beacon_set = 1;
2237 #endif /* HOSTAPD */
2238         }
2239         return ret;
2240  nla_put_failure:
2241         return -ENOBUFS;
2242 }
2243
2244
2245 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2246 {
2247         struct wpa_driver_nl80211_data *drv = priv;
2248         struct nl_msg *msg;
2249
2250         drv->beacon_int = value;
2251
2252 #ifdef HOSTAPD
2253         if (!drv->bss.beacon_set)
2254                 return 0;
2255 #else /* HOSTAPD */
2256         if (!drv->beacon_set)
2257                 return 0;
2258 #endif /* HOSTAPD */
2259
2260         msg = nlmsg_alloc();
2261         if (!msg)
2262                 return -ENOMEM;
2263
2264         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2265         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2266                     0, NL80211_CMD_SET_BEACON, 0);
2267         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2268
2269         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2270
2271         return send_and_recv_msgs(drv, msg, NULL, NULL);
2272  nla_put_failure:
2273         return -ENOBUFS;
2274 }
2275
2276
2277 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2278                                        int freq, int ht_enabled,
2279                                        int sec_channel_offset)
2280 {
2281         struct nl_msg *msg;
2282         int ret;
2283
2284         msg = nlmsg_alloc();
2285         if (!msg)
2286                 return -1;
2287
2288         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2289                     NL80211_CMD_SET_WIPHY, 0);
2290
2291         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2292         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2293         if (ht_enabled) {
2294                 switch (sec_channel_offset) {
2295                 case -1:
2296                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2297                                     NL80211_CHAN_HT40MINUS);
2298                         break;
2299                 case 1:
2300                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2301                                     NL80211_CHAN_HT40PLUS);
2302                         break;
2303                 default:
2304                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2305                                     NL80211_CHAN_HT20);
2306                         break;
2307                 }
2308         }
2309
2310         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2311         if (ret == 0)
2312                 return 0;
2313         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2314                    "%d (%s)", freq, ret, strerror(-ret));
2315 nla_put_failure:
2316         return -1;
2317 }
2318
2319 #endif /* CONFIG_AP || HOSTAPD */
2320
2321
2322 #ifdef CONFIG_AP
2323
2324 static int wpa_driver_nl80211_set_beacon(void *priv,
2325                                          const u8 *head, size_t head_len,
2326                                          const u8 *tail, size_t tail_len,
2327                                          int dtim_period)
2328 {
2329         struct wpa_driver_nl80211_data *drv = priv;
2330         return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2331                                                    head, head_len,
2332                                                    tail, tail_len,
2333                                                    dtim_period);
2334 }
2335
2336 #endif /* CONFIG_AP */
2337
2338 #if defined(CONFIG_AP) || defined(HOSTAPD)
2339
2340 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2341                                  int ifidx)
2342 {
2343         struct nl_msg *msg;
2344
2345 #ifdef HOSTAPD
2346         /* stop listening for EAPOL on this interface */
2347         del_ifidx(drv, ifidx);
2348 #endif /* HOSTAPD */
2349
2350         msg = nlmsg_alloc();
2351         if (!msg)
2352                 goto nla_put_failure;
2353
2354         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2355                     0, NL80211_CMD_DEL_INTERFACE, 0);
2356         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2357
2358         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2359                 return;
2360  nla_put_failure:
2361         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2362                    ifidx);
2363 }
2364
2365
2366 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2367                                 const char *ifname, enum nl80211_iftype iftype,
2368                                 const u8 *addr)
2369 {
2370         struct nl_msg *msg, *flags = NULL;
2371         int ifidx;
2372         int ret = -ENOBUFS;
2373
2374         msg = nlmsg_alloc();
2375         if (!msg)
2376                 return -1;
2377
2378         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2379                     0, NL80211_CMD_NEW_INTERFACE, 0);
2380         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2381         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2382         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2383
2384         if (iftype == NL80211_IFTYPE_MONITOR) {
2385                 int err;
2386
2387                 flags = nlmsg_alloc();
2388                 if (!flags)
2389                         goto nla_put_failure;
2390
2391                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2392
2393                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2394
2395                 nlmsg_free(flags);
2396
2397                 if (err)
2398                         goto nla_put_failure;
2399         }
2400
2401         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2402         if (ret) {
2403  nla_put_failure:
2404                 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2405                            ifname);
2406                 return ret;
2407         }
2408
2409         ifidx = if_nametoindex(ifname);
2410
2411         if (ifidx <= 0)
2412                 return -1;
2413
2414 #ifdef HOSTAPD
2415         /* start listening for EAPOL on this interface */
2416         add_ifidx(drv, ifidx);
2417
2418         if (addr && iftype == NL80211_IFTYPE_AP &&
2419             set_ifhwaddr(drv, ifname, addr)) {
2420                 nl80211_remove_iface(drv, ifidx);
2421                 return -1;
2422         }
2423 #endif /* HOSTAPD */
2424
2425         return ifidx;
2426 }
2427
2428 #endif /* CONFIG_AP || HOSTAPD */
2429
2430 #ifdef CONFIG_AP
2431
2432 void ap_tx_status(void *ctx, const u8 *addr,
2433                   const u8 *buf, size_t len, int ack);
2434 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2435 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2436                 struct hostapd_frame_info *fi);
2437 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2438
2439 #endif /* CONFIG_AP */
2440
2441 #if defined(CONFIG_AP) || defined(HOSTAPD)
2442
2443 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2444 {
2445         struct ieee80211_hdr *hdr;
2446         u16 fc, type, stype;
2447
2448         hdr = (struct ieee80211_hdr *) buf;
2449         fc = le_to_host16(hdr->frame_control);
2450
2451         type = WLAN_FC_GET_TYPE(fc);
2452         stype = WLAN_FC_GET_STYPE(fc);
2453
2454         switch (type) {
2455         case WLAN_FC_TYPE_MGMT:
2456                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2457                            ok ? "ACK" : "fail");
2458 #ifdef HOSTAPD
2459                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2460 #else /* HOSTAPD */
2461                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2462 #endif /* HOSTAPD */
2463                 break;
2464         case WLAN_FC_TYPE_CTRL:
2465                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2466                            ok ? "ACK" : "fail");
2467                 break;
2468         case WLAN_FC_TYPE_DATA:
2469 #ifdef HOSTAPD
2470                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2471 #else /* HOSTAPD */
2472                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2473 #endif /* HOSTAPD */
2474                 break;
2475         default:
2476                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2477                            type);
2478                 break;
2479         }
2480 }
2481
2482
2483 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2484                              struct ieee80211_hdr *hdr, size_t len)
2485 {
2486 #ifdef HOSTAPD
2487         hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2488 #else /* HOSTAPD */
2489         ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2490 #endif /* HOSTAPD */
2491 }
2492
2493
2494 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2495                          u8 *buf, size_t len,
2496                          struct hostapd_frame_info *hfi)
2497 {
2498         struct ieee80211_hdr *hdr;
2499         u16 fc, stype;
2500
2501         hdr = (struct ieee80211_hdr *) buf;
2502         fc = le_to_host16(hdr->frame_control);
2503         stype = WLAN_FC_GET_STYPE(fc);
2504
2505         switch (WLAN_FC_GET_TYPE(fc)) {
2506         case WLAN_FC_TYPE_MGMT:
2507                 if (stype != WLAN_FC_STYPE_BEACON &&
2508                     stype != WLAN_FC_STYPE_PROBE_REQ)
2509                         wpa_printf(MSG_MSGDUMP, "MGMT");
2510 #ifdef HOSTAPD
2511                 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2512 #else /* HOSTAPD */
2513                 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2514 #endif /* HOSTAPD */
2515                 break;
2516         case WLAN_FC_TYPE_CTRL:
2517                 /* can only get here with PS-Poll frames */
2518                 wpa_printf(MSG_DEBUG, "CTRL");
2519                 from_unknown_sta(drv, hdr, len);
2520                 break;
2521         case WLAN_FC_TYPE_DATA:
2522                 from_unknown_sta(drv, hdr, len);
2523                 break;
2524         }
2525 }
2526
2527
2528 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2529 {
2530         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2531         int len;
2532         unsigned char buf[3000];
2533         struct ieee80211_radiotap_iterator iter;
2534         int ret;
2535         struct hostapd_frame_info hfi;
2536         int injected = 0, failed = 0, rxflags = 0;
2537
2538         len = recv(sock, buf, sizeof(buf), 0);
2539         if (len < 0) {
2540                 perror("recv");
2541                 return;
2542         }
2543
2544         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2545                 printf("received invalid radiotap frame\n");
2546                 return;
2547         }
2548
2549         memset(&hfi, 0, sizeof(hfi));
2550
2551         while (1) {
2552                 ret = ieee80211_radiotap_iterator_next(&iter);
2553                 if (ret == -ENOENT)
2554                         break;
2555                 if (ret) {
2556                         printf("received invalid radiotap frame (%d)\n", ret);
2557                         return;
2558                 }
2559                 switch (iter.this_arg_index) {
2560                 case IEEE80211_RADIOTAP_FLAGS:
2561                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2562                                 len -= 4;
2563                         break;
2564                 case IEEE80211_RADIOTAP_RX_FLAGS:
2565                         rxflags = 1;
2566                         break;
2567                 case IEEE80211_RADIOTAP_TX_FLAGS:
2568                         injected = 1;
2569                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2570                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2571                         break;
2572                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2573                         break;
2574                 case IEEE80211_RADIOTAP_CHANNEL:
2575                         /* TODO convert from freq/flags to channel number
2576                         hfi.channel = XXX;
2577                         hfi.phytype = XXX;
2578                          */
2579                         break;
2580                 case IEEE80211_RADIOTAP_RATE:
2581                         hfi.datarate = *iter.this_arg * 5;
2582                         break;
2583                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2584                         hfi.ssi_signal = *iter.this_arg;
2585                         break;
2586                 }
2587         }
2588
2589         if (rxflags && injected)
2590                 return;
2591
2592         if (!injected)
2593                 handle_frame(drv, buf + iter.max_length,
2594                              len - iter.max_length, &hfi);
2595         else
2596                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2597                                    len - iter.max_length, !failed);
2598 }
2599
2600
2601 /*
2602  * we post-process the filter code later and rewrite
2603  * this to the offset to the last instruction
2604  */
2605 #define PASS    0xFF
2606 #define FAIL    0xFE
2607
2608 static struct sock_filter msock_filter_insns[] = {
2609         /*
2610          * do a little-endian load of the radiotap length field
2611          */
2612         /* load lower byte into A */
2613         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2614         /* put it into X (== index register) */
2615         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2616         /* load upper byte into A */
2617         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2618         /* left-shift it by 8 */
2619         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2620         /* or with X */
2621         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2622         /* put result into X */
2623         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2624
2625         /*
2626          * Allow management frames through, this also gives us those
2627          * management frames that we sent ourselves with status
2628          */
2629         /* load the lower byte of the IEEE 802.11 frame control field */
2630         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2631         /* mask off frame type and version */
2632         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2633         /* accept frame if it's both 0, fall through otherwise */
2634         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2635
2636         /*
2637          * TODO: add a bit to radiotap RX flags that indicates
2638          * that the sending station is not associated, then
2639          * add a filter here that filters on our DA and that flag
2640          * to allow us to deauth frames to that bad station.
2641          *
2642          * Not a regression -- we didn't do it before either.
2643          */
2644
2645 #if 0
2646         /*
2647          * drop non-data frames, WDS frames
2648          */
2649         /* load the lower byte of the frame control field */
2650         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2651         /* mask off QoS bit */
2652         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2653         /* drop non-data frames */
2654         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2655         /* load the upper byte of the frame control field */
2656         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2657         /* mask off toDS/fromDS */
2658         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2659         /* drop WDS frames */
2660         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2661 #endif
2662
2663         /*
2664          * add header length to index
2665          */
2666         /* load the lower byte of the frame control field */
2667         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2668         /* mask off QoS bit */
2669         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2670         /* right shift it by 6 to give 0 or 2 */
2671         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2672         /* add data frame header length */
2673         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2674         /* add index, was start of 802.11 header */
2675         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2676         /* move to index, now start of LL header */
2677         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2678
2679         /*
2680          * Accept empty data frames, we use those for
2681          * polling activity.
2682          */
2683         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2684         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2685
2686         /*
2687          * Accept EAPOL frames
2688          */
2689         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2690         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2691         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2692         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2693
2694         /* keep these last two statements or change the code below */
2695         /* return 0 == "DROP" */
2696         BPF_STMT(BPF_RET | BPF_K, 0),
2697         /* return ~0 == "keep all" */
2698         BPF_STMT(BPF_RET | BPF_K, ~0),
2699 };
2700
2701 static struct sock_fprog msock_filter = {
2702         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2703         .filter = msock_filter_insns,
2704 };
2705
2706
2707 static int add_monitor_filter(int s)
2708 {
2709         int idx;
2710
2711         /* rewrite all PASS/FAIL jump offsets */
2712         for (idx = 0; idx < msock_filter.len; idx++) {
2713                 struct sock_filter *insn = &msock_filter_insns[idx];
2714
2715                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2716                         if (insn->code == (BPF_JMP|BPF_JA)) {
2717                                 if (insn->k == PASS)
2718                                         insn->k = msock_filter.len - idx - 2;
2719                                 else if (insn->k == FAIL)
2720                                         insn->k = msock_filter.len - idx - 3;
2721                         }
2722
2723                         if (insn->jt == PASS)
2724                                 insn->jt = msock_filter.len - idx - 2;
2725                         else if (insn->jt == FAIL)
2726                                 insn->jt = msock_filter.len - idx - 3;
2727
2728                         if (insn->jf == PASS)
2729                                 insn->jf = msock_filter.len - idx - 2;
2730                         else if (insn->jf == FAIL)
2731                                 insn->jf = msock_filter.len - idx - 3;
2732                 }
2733         }
2734
2735         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2736                        &msock_filter, sizeof(msock_filter))) {
2737                 perror("SO_ATTACH_FILTER");
2738                 return -1;
2739         }
2740
2741         return 0;
2742 }
2743
2744
2745 static int
2746 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2747 {
2748         char buf[IFNAMSIZ];
2749         struct sockaddr_ll ll;
2750         int optval;
2751         socklen_t optlen;
2752
2753         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2754         buf[IFNAMSIZ - 1] = '\0';
2755
2756         drv->monitor_ifidx =
2757                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2758
2759         if (drv->monitor_ifidx < 0)
2760                 return -1;
2761
2762         if (hostapd_set_iface_flags(drv, buf, 1))
2763                 goto error;
2764
2765         memset(&ll, 0, sizeof(ll));
2766         ll.sll_family = AF_PACKET;
2767         ll.sll_ifindex = drv->monitor_ifidx;
2768         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2769         if (drv->monitor_sock < 0) {
2770                 perror("socket[PF_PACKET,SOCK_RAW]");
2771                 goto error;
2772         }
2773
2774         if (add_monitor_filter(drv->monitor_sock)) {
2775                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2776                            "interface; do filtering in user space");
2777                 /* This works, but will cost in performance. */
2778         }
2779
2780         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2781                 perror("monitor socket bind");
2782                 goto error;
2783         }
2784
2785         optlen = sizeof(optval);
2786         optval = 20;
2787         if (setsockopt
2788             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2789                 perror("Failed to set socket priority");
2790                 goto error;
2791         }
2792
2793         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2794                                      drv, NULL)) {
2795                 printf("Could not register monitor read socket\n");
2796                 goto error;
2797         }
2798
2799         return 0;
2800  error:
2801         nl80211_remove_iface(drv, drv->monitor_ifidx);
2802         return -1;
2803 }
2804
2805 #endif /* CONFIG_AP || HOSTAPD */
2806
2807 #ifdef CONFIG_AP
2808
2809 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2810                                  struct wpa_driver_associate_params *params)
2811 {
2812         if (drv->monitor_ifidx < 0 &&
2813             nl80211_create_monitor_interface(drv))
2814                 return -1;
2815
2816         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2817             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
2818                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2819                 drv->monitor_ifidx = -1;
2820                 return -1;
2821         }
2822
2823         /* TODO: setup monitor interface (and add code somewhere to remove this
2824          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2825
2826         return 0;
2827 }
2828 #endif /* CONFIG_AP */
2829
2830
2831 #ifndef HOSTAPD
2832 static int wpa_driver_nl80211_associate(
2833         void *priv, struct wpa_driver_associate_params *params)
2834 {
2835         struct wpa_driver_nl80211_data *drv = priv;
2836         int ret = -1;
2837         struct nl_msg *msg;
2838
2839 #ifdef CONFIG_AP
2840         if (params->mode == 2)
2841                 return wpa_driver_nl80211_ap(drv, params);
2842 #endif /* CONFIG_AP */
2843
2844 #ifndef NO_WEXT
2845         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2846                                           params->drop_unencrypted);
2847 #endif /* NO_WEXT */
2848
2849         drv->associated = 0;
2850
2851         msg = nlmsg_alloc();
2852         if (!msg)
2853                 return -1;
2854
2855         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2856                    drv->ifindex);
2857         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2858                     NL80211_CMD_ASSOCIATE, 0);
2859
2860         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2861         if (params->bssid) {
2862                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2863                            MAC2STR(params->bssid));
2864                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2865         }
2866         if (params->freq) {
2867                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2868                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2869         }
2870         if (params->ssid) {
2871                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2872                                   params->ssid, params->ssid_len);
2873                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2874                         params->ssid);
2875                 if (params->ssid_len > sizeof(drv->ssid))
2876                         goto nla_put_failure;
2877                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2878                 drv->ssid_len = params->ssid_len;
2879         }
2880         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
2881         if (params->wpa_ie)
2882                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2883                         params->wpa_ie);
2884
2885         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2886         msg = NULL;
2887         if (ret) {
2888                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2889                            "(%s)", ret, strerror(-ret));
2890                 goto nla_put_failure;
2891         }
2892         ret = 0;
2893         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2894                    "successfully");
2895
2896 nla_put_failure:
2897         nlmsg_free(msg);
2898         return ret;
2899 }
2900 #endif /* HOSTAPD */
2901
2902
2903 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2904                             int ifindex, int mode)
2905 {
2906         struct nl_msg *msg;
2907         int ret = -ENOBUFS;
2908
2909         msg = nlmsg_alloc();
2910         if (!msg)
2911                 return -ENOMEM;
2912
2913         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2914                     0, NL80211_CMD_SET_INTERFACE, 0);
2915         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2916         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
2917
2918         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2919         if (!ret)
2920                 return 0;
2921 nla_put_failure:
2922         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
2923                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
2924         return ret;
2925 }
2926
2927
2928 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
2929 {
2930         struct wpa_driver_nl80211_data *drv = priv;
2931         int ret = -1;
2932         int nlmode;
2933
2934         switch (mode) {
2935         case 0:
2936                 nlmode = NL80211_IFTYPE_STATION;
2937                 break;
2938         case 1:
2939                 nlmode = NL80211_IFTYPE_ADHOC;
2940                 break;
2941         case 2:
2942                 nlmode = NL80211_IFTYPE_AP;
2943                 break;
2944         default:
2945                 return -1;
2946         }
2947
2948         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
2949                 drv->nlmode = nlmode;
2950                 return 0;
2951         }
2952
2953         if (nlmode == drv->nlmode)
2954                 return 0; /* Already in the requested mode */
2955
2956         /* mac80211 doesn't allow mode changes while the device is up, so
2957          * take the device down, try to set the mode again, and bring the
2958          * device back up.
2959          */
2960         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
2961                 /* Try to set the mode again while the interface is down */
2962                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
2963                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
2964                         ret = -1;
2965         }
2966
2967         if (!ret)
2968                 drv->nlmode = nlmode;
2969
2970         return ret;
2971 }
2972
2973
2974 #ifndef HOSTAPD
2975
2976 static int wpa_driver_nl80211_get_capa(void *priv,
2977                                        struct wpa_driver_capa *capa)
2978 {
2979         struct wpa_driver_nl80211_data *drv = priv;
2980         if (!drv->has_capability)
2981                 return -1;
2982         os_memcpy(capa, &drv->capa, sizeof(*capa));
2983         return 0;
2984 }
2985
2986
2987 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2988 {
2989         struct wpa_driver_nl80211_data *drv = priv;
2990
2991         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2992                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2993         drv->operstate = state;
2994         return wpa_driver_nl80211_send_oper_ifla(
2995                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2996 }
2997
2998 #endif /* HOSTAPD */
2999
3000
3001 #ifdef HOSTAPD
3002
3003 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3004
3005
3006 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3007                                  int ifindex)
3008 {
3009         struct i802_bss *bss = &drv->bss;
3010         while (bss) {
3011                 if (ifindex == bss->ifindex)
3012                         return bss;
3013                 bss = bss->next;
3014         }
3015         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3016         return NULL;
3017 }
3018
3019
3020 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3021 {
3022         int i;
3023         int *old;
3024
3025         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3026                    ifidx);
3027         for (i = 0; i < drv->num_if_indices; i++) {
3028                 if (drv->if_indices[i] == 0) {
3029                         drv->if_indices[i] = ifidx;
3030                         return;
3031                 }
3032         }
3033
3034         if (drv->if_indices != drv->default_if_indices)
3035                 old = drv->if_indices;
3036         else
3037                 old = NULL;
3038
3039         drv->if_indices = realloc(old,
3040                                   sizeof(int) * (drv->num_if_indices + 1));
3041         if (!drv->if_indices) {
3042                 if (!old)
3043                         drv->if_indices = drv->default_if_indices;
3044                 else
3045                         drv->if_indices = old;
3046                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3047                            "interfaces");
3048                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3049                 return;
3050         }
3051         drv->if_indices[drv->num_if_indices] = ifidx;
3052         drv->num_if_indices++;
3053 }
3054
3055
3056 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3057 {
3058         int i;
3059
3060         for (i = 0; i < drv->num_if_indices; i++) {
3061                 if (drv->if_indices[i] == ifidx) {
3062                         drv->if_indices[i] = 0;
3063                         break;
3064                 }
3065         }
3066 }
3067
3068
3069 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3070 {
3071         int i;
3072
3073         for (i = 0; i < drv->num_if_indices; i++)
3074                 if (drv->if_indices[i] == ifidx)
3075                         return 1;
3076
3077         return 0;
3078 }
3079
3080
3081 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3082                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3083                         size_t seq_len, const u8 *key, size_t key_len)
3084 {
3085         struct wpa_driver_nl80211_data *drv = priv;
3086         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3087                            set_tx, seq, seq_len, key, key_len);
3088 }
3089
3090
3091 static inline int min_int(int a, int b)
3092 {
3093         if (a < b)
3094                 return a;
3095         return b;
3096 }
3097
3098
3099 static int get_key_handler(struct nl_msg *msg, void *arg)
3100 {
3101         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3102         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3103
3104         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3105                   genlmsg_attrlen(gnlh, 0), NULL);
3106
3107         /*
3108          * TODO: validate the key index and mac address!
3109          * Otherwise, there's a race condition as soon as
3110          * the kernel starts sending key notifications.
3111          */
3112
3113         if (tb[NL80211_ATTR_KEY_SEQ])
3114                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3115                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3116         return NL_SKIP;
3117 }
3118
3119
3120 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3121                            int idx, u8 *seq)
3122 {
3123         struct wpa_driver_nl80211_data *drv = priv;
3124         struct nl_msg *msg;
3125
3126         msg = nlmsg_alloc();
3127         if (!msg)
3128                 return -ENOMEM;
3129
3130         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3131                     0, NL80211_CMD_GET_KEY, 0);
3132
3133         if (addr)
3134                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3135         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3136         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3137
3138         memset(seq, 0, 6);
3139
3140         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3141  nla_put_failure:
3142         return -ENOBUFS;
3143 }
3144
3145
3146 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3147                               int mode)
3148 {
3149         struct wpa_driver_nl80211_data *drv = priv;
3150         struct nl_msg *msg;
3151         u8 rates[NL80211_MAX_SUPP_RATES];
3152         u8 rates_len = 0;
3153         int i;
3154
3155         msg = nlmsg_alloc();
3156         if (!msg)
3157                 return -ENOMEM;
3158
3159         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3160                     NL80211_CMD_SET_BSS, 0);
3161
3162         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3163                 rates[rates_len++] = basic_rates[i] / 5;
3164
3165         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3166
3167         /* TODO: multi-BSS support */
3168         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3169
3170         return send_and_recv_msgs(drv, msg, NULL, NULL);
3171  nla_put_failure:
3172         return -ENOBUFS;
3173 }
3174
3175
3176 /* Set kernel driver on given frequency (MHz) */
3177 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3178 {
3179         struct wpa_driver_nl80211_data *drv = priv;
3180         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3181                                            freq->sec_channel_offset);
3182 }
3183
3184
3185 static int i802_set_rts(void *priv, int rts)
3186 {
3187 #ifdef NO_WEXT
3188         return -1;
3189 #else /* NO_WEXT */
3190         struct wpa_driver_nl80211_data *drv = priv;
3191         struct iwreq iwr;
3192
3193         memset(&iwr, 0, sizeof(iwr));
3194         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3195         iwr.u.rts.value = rts;
3196         iwr.u.rts.fixed = 1;
3197
3198         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3199                 perror("ioctl[SIOCSIWRTS]");
3200                 return -1;
3201         }
3202
3203         return 0;
3204 #endif /* NO_WEXT */
3205 }
3206
3207
3208 static int i802_set_frag(void *priv, int frag)
3209 {
3210 #ifdef NO_WEXT
3211         return -1;
3212 #else /* NO_WEXT */
3213         struct wpa_driver_nl80211_data *drv = priv;
3214         struct iwreq iwr;
3215
3216         memset(&iwr, 0, sizeof(iwr));
3217         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3218         iwr.u.frag.value = frag;
3219         iwr.u.frag.fixed = 1;
3220
3221         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3222                 perror("ioctl[SIOCSIWFRAG]");
3223                 return -1;
3224         }
3225
3226         return 0;
3227 #endif /* NO_WEXT */
3228 }
3229
3230
3231 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3232 {
3233 #ifdef NO_WEXT
3234         return -1;
3235 #else /* NO_WEXT */
3236         struct wpa_driver_nl80211_data *drv = priv;
3237         struct iwreq iwr;
3238
3239         memset(&iwr, 0, sizeof(iwr));
3240         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3241
3242         iwr.u.retry.value = short_retry;
3243         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3244         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3245                 perror("ioctl[SIOCSIWRETRY(short)]");
3246                 return -1;
3247         }
3248
3249         iwr.u.retry.value = long_retry;
3250         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3251         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3252                 perror("ioctl[SIOCSIWRETRY(long)]");
3253                 return -1;
3254         }
3255
3256         return 0;
3257 #endif /* NO_WEXT */
3258 }
3259
3260
3261 static int i802_flush(void *priv)
3262 {
3263         struct wpa_driver_nl80211_data *drv = priv;
3264         struct nl_msg *msg;
3265
3266         msg = nlmsg_alloc();
3267         if (!msg)
3268                 return -1;
3269
3270         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3271                     0, NL80211_CMD_DEL_STATION, 0);
3272
3273         /*
3274          * XXX: FIX! this needs to flush all VLANs too
3275          */
3276         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3277                     if_nametoindex(drv->ifname));
3278
3279         return send_and_recv_msgs(drv, msg, NULL, NULL);
3280  nla_put_failure:
3281         return -ENOBUFS;
3282 }
3283
3284
3285 static int get_sta_handler(struct nl_msg *msg, void *arg)
3286 {
3287         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3288         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3289         struct hostap_sta_driver_data *data = arg;
3290         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3291         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3292                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3293                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3294                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3295                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3296                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3297         };
3298
3299         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3300                   genlmsg_attrlen(gnlh, 0), NULL);
3301
3302         /*
3303          * TODO: validate the interface and mac address!
3304          * Otherwise, there's a race condition as soon as
3305          * the kernel starts sending station notifications.
3306          */
3307
3308         if (!tb[NL80211_ATTR_STA_INFO]) {
3309                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3310                 return NL_SKIP;
3311         }
3312         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3313                              tb[NL80211_ATTR_STA_INFO],
3314                              stats_policy)) {
3315                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3316                 return NL_SKIP;
3317         }
3318
3319         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3320                 data->inactive_msec =
3321                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3322         if (stats[NL80211_STA_INFO_RX_BYTES])
3323                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3324         if (stats[NL80211_STA_INFO_TX_BYTES])
3325                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3326         if (stats[NL80211_STA_INFO_RX_PACKETS])
3327                 data->rx_packets =
3328                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3329         if (stats[NL80211_STA_INFO_TX_PACKETS])
3330                 data->tx_packets =
3331                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3332
3333         return NL_SKIP;
3334 }
3335
3336 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3337                               const u8 *addr)
3338 {
3339         struct wpa_driver_nl80211_data *drv = priv;
3340         struct nl_msg *msg;
3341
3342         os_memset(data, 0, sizeof(*data));
3343         msg = nlmsg_alloc();
3344         if (!msg)
3345                 return -ENOMEM;
3346
3347         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3348                     0, NL80211_CMD_GET_STATION, 0);
3349
3350         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3351         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3352
3353         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3354  nla_put_failure:
3355         return -ENOBUFS;
3356 }
3357
3358
3359 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3360                            size_t data_len, int encrypt, const u8 *own_addr)
3361 {
3362         struct wpa_driver_nl80211_data *drv = priv;
3363         struct ieee80211_hdr *hdr;
3364         size_t len;
3365         u8 *pos;
3366         int res;
3367 #if 0 /* FIX */
3368         int qos = sta->flags & WLAN_STA_WME;
3369 #else
3370         int qos = 0;
3371 #endif
3372
3373         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3374                 data_len;
3375         hdr = os_zalloc(len);
3376         if (hdr == NULL) {
3377                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3378                        (unsigned long) len);
3379                 return -1;
3380         }
3381
3382         hdr->frame_control =
3383                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3384         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3385         if (encrypt)
3386                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3387 #if 0 /* To be enabled if qos determination is added above */
3388         if (qos) {
3389                 hdr->frame_control |=
3390                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3391         }
3392 #endif
3393
3394         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3395         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3396         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3397         pos = (u8 *) (hdr + 1);
3398
3399 #if 0 /* To be enabled if qos determination is added above */
3400         if (qos) {
3401                 /* add an empty QoS header if needed */
3402                 pos[0] = 0;
3403                 pos[1] = 0;
3404                 pos += 2;
3405         }
3406 #endif
3407
3408         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3409         pos += sizeof(rfc1042_header);
3410         WPA_PUT_BE16(pos, ETH_P_PAE);
3411         pos += 2;
3412         memcpy(pos, data, data_len);
3413
3414         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3415         if (res < 0) {
3416                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3417                            "failed: %d (%s)",
3418                            (unsigned long) len, errno, strerror(errno));
3419         }
3420         free(hdr);
3421
3422         return res;
3423 }
3424
3425
3426 static int i802_sta_add(const char *ifname, void *priv,
3427                         struct hostapd_sta_add_params *params)
3428 {
3429         struct wpa_driver_nl80211_data *drv = priv;
3430         struct nl_msg *msg;
3431         int ret = -ENOBUFS;
3432
3433         msg = nlmsg_alloc();
3434         if (!msg)
3435                 return -ENOMEM;
3436
3437         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3438                     0, NL80211_CMD_NEW_STATION, 0);
3439
3440         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3441                     if_nametoindex(drv->ifname));
3442         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3443         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3444         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3445                 params->supp_rates);
3446         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3447                     params->listen_interval);
3448
3449 #ifdef CONFIG_IEEE80211N
3450         if (params->ht_capabilities) {
3451                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3452                         params->ht_capabilities->length,
3453                         &params->ht_capabilities->data);
3454         }
3455 #endif /* CONFIG_IEEE80211N */
3456
3457         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3458         if (ret)
3459                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3460                            "result: %d (%s)", ret, strerror(-ret));
3461         if (ret == -EEXIST)
3462                 ret = 0;
3463  nla_put_failure:
3464         return ret;
3465 }
3466
3467
3468 static int i802_sta_remove(void *priv, const u8 *addr)
3469 {
3470         struct wpa_driver_nl80211_data *drv = priv;
3471         struct nl_msg *msg;
3472         int ret;
3473
3474         msg = nlmsg_alloc();
3475         if (!msg)
3476                 return -ENOMEM;
3477
3478         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3479                     0, NL80211_CMD_DEL_STATION, 0);
3480
3481         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3482                     if_nametoindex(drv->ifname));
3483         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3484
3485         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3486         if (ret == -ENOENT)
3487                 return 0;
3488         return ret;
3489  nla_put_failure:
3490         return -ENOBUFS;
3491 }
3492
3493
3494 static int i802_sta_set_flags(void *priv, const u8 *addr,
3495                               int total_flags, int flags_or, int flags_and)
3496 {
3497         struct wpa_driver_nl80211_data *drv = priv;
3498         struct nl_msg *msg, *flags = NULL;
3499
3500         msg = nlmsg_alloc();
3501         if (!msg)
3502                 return -ENOMEM;
3503
3504         flags = nlmsg_alloc();
3505         if (!flags) {
3506                 nlmsg_free(msg);
3507                 return -ENOMEM;
3508         }
3509
3510         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3511                     0, NL80211_CMD_SET_STATION, 0);
3512
3513         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3514                     if_nametoindex(drv->ifname));
3515         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3516
3517         if (total_flags & WLAN_STA_AUTHORIZED)
3518                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3519
3520         if (total_flags & WLAN_STA_WMM)
3521                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3522
3523         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3524                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3525
3526         if (total_flags & WLAN_STA_MFP)
3527                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3528
3529         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3530                 goto nla_put_failure;
3531
3532         nlmsg_free(flags);
3533
3534         return send_and_recv_msgs(drv, msg, NULL, NULL);
3535  nla_put_failure:
3536         nlmsg_free(flags);
3537         return -ENOBUFS;
3538 }
3539
3540
3541 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3542                                     int cw_min, int cw_max, int burst_time)
3543 {
3544         struct wpa_driver_nl80211_data *drv = priv;
3545         struct nl_msg *msg;
3546         struct nlattr *txq, *params;
3547
3548         msg = nlmsg_alloc();
3549         if (!msg)
3550                 return -1;
3551
3552         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3553                     0, NL80211_CMD_SET_WIPHY, 0);
3554
3555         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3556
3557         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3558         if (!txq)
3559                 goto nla_put_failure;
3560
3561         /* We are only sending parameters for a single TXQ at a time */
3562         params = nla_nest_start(msg, 1);
3563         if (!params)
3564                 goto nla_put_failure;
3565
3566         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3567         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3568          * 32 usec, so need to convert the value here. */
3569         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3570         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3571         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3572         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3573
3574         nla_nest_end(msg, params);
3575
3576         nla_nest_end(msg, txq);
3577
3578         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3579                 return 0;
3580  nla_put_failure:
3581         return -1;
3582 }
3583
3584
3585 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3586 {
3587         struct wpa_driver_nl80211_data *drv = priv;
3588         int ifidx;
3589         struct i802_bss *bss;
3590
3591         bss = os_zalloc(sizeof(*bss));
3592         if (bss == NULL)
3593                 return -1;
3594
3595         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3596         if (ifidx < 0) {
3597                 os_free(bss);
3598                 return -1;
3599         }
3600         bss->ifindex = ifidx;
3601         if (hostapd_set_iface_flags(priv, ifname, 1)) {
3602                 nl80211_remove_iface(priv, ifidx);
3603                 os_free(bss);
3604                 return -1;
3605         }
3606         bss->next = drv->bss.next;
3607         drv->bss.next = bss;
3608         return 0;
3609 }
3610
3611
3612 static int i802_bss_remove(void *priv, const char *ifname)
3613 {
3614         struct wpa_driver_nl80211_data *drv = priv;
3615         struct i802_bss *bss, *prev;
3616         int ifindex = if_nametoindex(ifname);
3617         nl80211_remove_iface(priv, ifindex);
3618         prev = &drv->bss;
3619         bss = drv->bss.next;
3620         while (bss) {
3621                 if (ifindex == bss->ifindex) {
3622                         prev->next = bss->next;
3623                         os_free(bss);
3624                         break;
3625                 }
3626                 prev = bss;
3627                 bss = bss->next;
3628         }
3629         return 0;
3630 }
3631
3632
3633 static int i802_set_beacon(const char *iface, void *priv,
3634                            const u8 *head, size_t head_len,
3635                            const u8 *tail, size_t tail_len, int dtim_period)
3636 {
3637         return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3638                                                    head, head_len,
3639                                                    tail, tail_len,
3640                                                    dtim_period);
3641 }
3642
3643
3644 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3645 {
3646         struct wpa_driver_nl80211_data *drv = priv;
3647         struct nl_msg *msg;
3648
3649         msg = nlmsg_alloc();
3650         if (!msg)
3651                 return -ENOMEM;
3652
3653         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3654                     NL80211_CMD_SET_BSS, 0);
3655
3656         if (cts >= 0)
3657                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3658         if (preamble >= 0)
3659                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3660         if (slot >= 0)
3661                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3662
3663         /* TODO: multi-BSS support */
3664         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3665
3666         return send_and_recv_msgs(drv, msg, NULL, NULL);
3667  nla_put_failure:
3668         return -ENOBUFS;
3669 }
3670
3671
3672 static int i802_set_cts_protect(void *priv, int value)
3673 {
3674         return i802_set_bss(priv, value, -1, -1);
3675 }
3676
3677
3678 static int i802_set_preamble(void *priv, int value)
3679 {
3680         return i802_set_bss(priv, -1, value, -1);
3681 }
3682
3683
3684 static int i802_set_short_slot_time(void *priv, int value)
3685 {
3686         return i802_set_bss(priv, -1, -1, value);
3687 }
3688
3689
3690 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3691 {
3692         switch (type) {
3693         case HOSTAPD_IF_VLAN:
3694                 return NL80211_IFTYPE_AP_VLAN;
3695         }
3696         return -1;
3697 }
3698
3699
3700 static int i802_if_add(const char *iface, void *priv,
3701                        enum hostapd_driver_if_type type, char *ifname,
3702                        const u8 *addr)
3703 {
3704         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3705                 return -1;
3706         return 0;
3707 }
3708
3709
3710 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3711                           char *ifname, const u8 *addr)
3712 {
3713         /* unused at the moment */
3714         return -1;
3715 }
3716
3717
3718 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3719                           const char *ifname, const u8 *addr)
3720 {
3721         nl80211_remove_iface(priv, if_nametoindex(ifname));
3722         return 0;
3723 }
3724
3725
3726 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3727                              const char *ifname, int vlan_id)
3728 {
3729         struct wpa_driver_nl80211_data *drv = priv;
3730         struct nl_msg *msg;
3731
3732         msg = nlmsg_alloc();
3733         if (!msg)
3734                 return -ENOMEM;
3735
3736         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3737                     0, NL80211_CMD_SET_STATION, 0);
3738
3739         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3740                     if_nametoindex(drv->ifname));
3741         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3742         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3743                     if_nametoindex(ifname));
3744
3745         return send_and_recv_msgs(drv, msg, NULL, NULL);
3746  nla_put_failure:
3747         return -ENOBUFS;
3748 }
3749
3750
3751 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3752 {
3753         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3754         struct sockaddr_ll lladdr;
3755         unsigned char buf[3000];
3756         int len;
3757         socklen_t fromlen = sizeof(lladdr);
3758
3759         len = recvfrom(sock, buf, sizeof(buf), 0,
3760                        (struct sockaddr *)&lladdr, &fromlen);
3761         if (len < 0) {
3762                 perror("recv");
3763                 return;
3764         }
3765
3766         if (have_ifidx(drv, lladdr.sll_ifindex)) {
3767                 void *ctx;
3768                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
3769                 if (!ctx)
3770                         return;
3771                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
3772         }
3773 }
3774
3775
3776 static int i802_get_inact_sec(void *priv, const u8 *addr)
3777 {
3778         struct hostap_sta_driver_data data;
3779         int ret;
3780
3781         data.inactive_msec = (unsigned long) -1;
3782         ret = i802_read_sta_data(priv, &data, addr);
3783         if (ret || data.inactive_msec == (unsigned long) -1)
3784                 return -1;
3785         return data.inactive_msec / 1000;
3786 }
3787
3788
3789 static int i802_sta_clear_stats(void *priv, const u8 *addr)
3790 {
3791 #if 0
3792         /* TODO */
3793 #endif
3794         return 0;
3795 }
3796
3797
3798 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
3799                            int reason)
3800 {
3801         struct wpa_driver_nl80211_data *drv = priv;
3802         struct ieee80211_mgmt mgmt;
3803
3804         memset(&mgmt, 0, sizeof(mgmt));
3805         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3806                                           WLAN_FC_STYPE_DEAUTH);
3807         memcpy(mgmt.da, addr, ETH_ALEN);
3808         memcpy(mgmt.sa, own_addr, ETH_ALEN);
3809         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
3810         mgmt.u.deauth.reason_code = host_to_le16(reason);
3811         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3812                                             IEEE80211_HDRLEN +
3813                                             sizeof(mgmt.u.deauth));
3814 }
3815
3816
3817 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
3818                              int reason)
3819 {
3820         struct wpa_driver_nl80211_data *drv = priv;
3821         struct ieee80211_mgmt mgmt;
3822
3823         memset(&mgmt, 0, sizeof(mgmt));
3824         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3825                                           WLAN_FC_STYPE_DISASSOC);
3826         memcpy(mgmt.da, addr, ETH_ALEN);
3827         memcpy(mgmt.sa, own_addr, ETH_ALEN);
3828         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
3829         mgmt.u.disassoc.reason_code = host_to_le16(reason);
3830         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3831                                             IEEE80211_HDRLEN +
3832                                             sizeof(mgmt.u.disassoc));
3833 }
3834
3835
3836 static void *i802_init(struct hostapd_data *hapd,
3837                        struct wpa_init_params *params)
3838 {
3839         struct wpa_driver_nl80211_data *drv;
3840         size_t i;
3841
3842         drv = wpa_driver_nl80211_init(hapd, params->ifname);
3843         if (drv == NULL)
3844                 return NULL;
3845
3846         drv->bss.ifindex = drv->ifindex;
3847
3848         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
3849         drv->if_indices = drv->default_if_indices;
3850         for (i = 0; i < params->num_bridge; i++) {
3851                 if (params->bridge[i])
3852                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
3853         }
3854
3855         /* start listening for EAPOL on the default AP interface */
3856         add_ifidx(drv, drv->ifindex);
3857
3858         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
3859                 goto failed;
3860
3861         if (params->bssid && set_ifhwaddr(drv, drv->ifname, params->bssid))
3862                 goto failed;
3863
3864         /* Initialise a monitor interface */
3865         if (nl80211_create_monitor_interface(drv))
3866                 goto failed;
3867
3868         if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
3869                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
3870                            "into AP mode", drv->ifname);
3871                 goto failed;
3872         }
3873
3874         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3875                 goto failed;
3876
3877         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
3878         if (drv->eapol_sock < 0) {
3879                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
3880                 goto failed;
3881         }
3882
3883         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
3884         {
3885                 printf("Could not register read socket for eapol\n");
3886                 goto failed;
3887         }
3888
3889         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
3890                 goto failed;
3891
3892         return drv;
3893
3894 failed:
3895         if (drv->monitor_ifidx >= 0)
3896                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3897         if (drv->ioctl_sock >= 0)
3898                 close(drv->ioctl_sock);
3899
3900         genl_family_put(drv->nl80211);
3901         nl_cache_free(drv->nl_cache);
3902         nl_handle_destroy(drv->nl_handle);
3903         nl_cb_put(drv->nl_cb);
3904
3905         os_free(drv);
3906         return NULL;
3907 }
3908
3909
3910 static void i802_deinit(void *priv)
3911 {
3912         wpa_driver_nl80211_deinit(priv);
3913 }
3914
3915 #endif /* HOSTAPD */
3916
3917
3918 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
3919         .name = "nl80211",
3920         .desc = "Linux nl80211/cfg80211",
3921 #ifndef HOSTAPD
3922         .get_bssid = wpa_driver_nl80211_get_bssid,
3923         .get_ssid = wpa_driver_nl80211_get_ssid,
3924         .set_key = wpa_driver_nl80211_set_key,
3925 #endif /* HOSTAPD */
3926         .scan2 = wpa_driver_nl80211_scan,
3927         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
3928 #ifndef HOSTAPD
3929         .deauthenticate = wpa_driver_nl80211_deauthenticate,
3930         .disassociate = wpa_driver_nl80211_disassociate,
3931         .authenticate = wpa_driver_nl80211_authenticate,
3932         .associate = wpa_driver_nl80211_associate,
3933         .init = wpa_driver_nl80211_init,
3934         .deinit = wpa_driver_nl80211_deinit,
3935         .get_capa = wpa_driver_nl80211_get_capa,
3936         .set_operstate = wpa_driver_nl80211_set_operstate,
3937 #endif /* HOSTAPD */
3938         .set_country = wpa_driver_nl80211_set_country,
3939         .set_mode = wpa_driver_nl80211_set_mode,
3940 #ifdef CONFIG_AP
3941         .set_beacon = wpa_driver_nl80211_set_beacon,
3942 #endif /* CONFIG_AP */
3943 #if defined(CONFIG_AP) || defined(HOSTAPD)
3944         .send_mlme = wpa_driver_nl80211_send_mlme,
3945         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
3946         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
3947 #endif /* CONFIG_AP || HOSTAPD */
3948 #ifdef HOSTAPD
3949         .hapd_init = i802_init,
3950         .hapd_deinit = i802_deinit,
3951         .hapd_set_key = i802_set_key,
3952         .get_seqnum = i802_get_seqnum,
3953         .flush = i802_flush,
3954         .read_sta_data = i802_read_sta_data,
3955         .hapd_send_eapol = i802_send_eapol,
3956         .sta_set_flags = i802_sta_set_flags,
3957         .sta_deauth = i802_sta_deauth,
3958         .sta_disassoc = i802_sta_disassoc,
3959         .sta_remove = i802_sta_remove,
3960         .sta_add = i802_sta_add,
3961         .get_inact_sec = i802_get_inact_sec,
3962         .sta_clear_stats = i802_sta_clear_stats,
3963         .set_freq = i802_set_freq,
3964         .set_rts = i802_set_rts,
3965         .set_frag = i802_set_frag,
3966         .set_retry = i802_set_retry,
3967         .set_rate_sets = i802_set_rate_sets,
3968         .hapd_set_beacon = i802_set_beacon,
3969         .set_cts_protect = i802_set_cts_protect,
3970         .set_preamble = i802_set_preamble,
3971         .set_short_slot_time = i802_set_short_slot_time,
3972         .set_tx_queue_params = i802_set_tx_queue_params,
3973         .bss_add = i802_bss_add,
3974         .bss_remove = i802_bss_remove,
3975         .if_add = i802_if_add,
3976         .if_update = i802_if_update,
3977         .if_remove = i802_if_remove,
3978         .set_sta_vlan = i802_set_sta_vlan,
3979 #endif /* HOSTAPD */
3980 };