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 #include "../../hostapd/sta_flags.h"
  44 #endif /* CONFIG_AP || HOSTAPD */
  45
  46 #ifdef HOSTAPD
  47 #include "ieee802_11_common.h"
  48 #endif /* HOSTAPD */
  49
  50 #ifdef CONFIG_LIBNL20
  51 /* libnl 2.0 compatibility code */
  52 #define nl_handle nl_sock
  53 #define nl_handle_alloc_cb nl_socket_alloc_cb
  54 #define nl_handle_destroy nl_socket_free
  55 #endif /* CONFIG_LIBNL20 */
  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_handle *nl_handle_event;
  94         struct nl_cache *nl_cache;
  95         struct nl_cache *nl_cache_event;
  96         struct nl_cb *nl_cb;
  97         struct genl_family *nl80211;
  98
  99         u8 bssid[ETH_ALEN];
 100         int associated;
 101         u8 ssid[32];
 102         size_t ssid_len;
 103         int nlmode;
 104         int ap_scan_as_station;
 105
 106         int beacon_int;
 107         int monitor_sock;
 108         int monitor_ifidx;
 109
 110 #ifdef CONFIG_AP
 111         unsigned int beacon_set:1;
 112 #endif /* CONFIG_AP */
 113
 114 #ifdef HOSTAPD
 115         int eapol_sock; /* socket for EAPOL frames */
 116
 117         int default_if_indices[16];
 118         int *if_indices;
 119         int num_if_indices;
 120
 121         struct i802_bss bss;
 122
 123         int last_freq;
 124         int last_freq_ht;
 125 #endif /* HOSTAPD */
 126 };
 127
 128
 129 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 130                                             void *timeout_ctx);
 131 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 132 static int
 133 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 134
 135 #if defined(CONFIG_AP) || defined(HOSTAPD)
 136 static void nl80211_remove_monitor_interface(
 137         struct wpa_driver_nl80211_data *drv);
 138 #endif /* CONFIG_AP || HOSTAPD */
 139
 140 #ifdef CONFIG_AP
 141 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 142                                  int ifidx);
 143 #endif /* CONFIG_AP */
 144
 145 #ifdef HOSTAPD
 146 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 147 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 148 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 149                                  int ifindex);
 150 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 151                                  int ifidx);
 152 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 153 #endif /* HOSTAPD */
 154
 155
 156 /* nl80211 code */
 157 static int ack_handler(struct nl_msg *msg, void *arg)
 158 {
 159         int *err = arg;
 160         *err = 0;
 161         return NL_STOP;
 162 }
 163
 164 static int finish_handler(struct nl_msg *msg, void *arg)
 165 {
 166         int *ret = arg;
 167         *ret = 0;
 168         return NL_SKIP;
 169 }
 170
 171 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 172                          void *arg)
 173 {
 174         int *ret = arg;
 175         *ret = err->error;
 176         return NL_SKIP;
 177 }
 178
 179
 180 static int no_seq_check(struct nl_msg *msg, void *arg)
 181 {
 182         return NL_OK;
 183 }
 184
 185
 186 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 187                               struct nl_msg *msg,
 188                               int (*valid_handler)(struct nl_msg *, void *),
 189                               void *valid_data)
 190 {
 191         struct nl_cb *cb;
 192         int err = -ENOMEM;
 193
 194         cb = nl_cb_clone(drv->nl_cb);
 195         if (!cb)
 196                 goto out;
 197
 198         err = nl_send_auto_complete(drv->nl_handle, msg);
 199         if (err < 0)
 200                 goto out;
 201
 202         err = 1;
 203
 204         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 205         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 206         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 207
 208         if (valid_handler)
 209                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 210                           valid_handler, valid_data);
 211
 212         while (err > 0)
 213                 nl_recvmsgs(drv->nl_handle, cb);
 214  out:
 215         nl_cb_put(cb);
 216         nlmsg_free(msg);
 217         return err;
 218 }
 219
 220
 221 struct family_data {
 222         const char *group;
 223         int id;
 224 };
 225
 226
 227 static int family_handler(struct nl_msg *msg, void *arg)
 228 {
 229         struct family_data *res = arg;
 230         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 231         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 232         struct nlattr *mcgrp;
 233         int i;
 234
 235         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 236                   genlmsg_attrlen(gnlh, 0), NULL);
 237         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 238                 return NL_SKIP;
 239
 240         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 241                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 242                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 243                           nla_len(mcgrp), NULL);
 244                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 245                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 246                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 247                                res->group,
 248                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 249                         continue;
 250                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 251                 break;
 252         };
 253
 254         return NL_SKIP;
 255 }
 256
 257
 258 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 259                                const char *family, const char *group)
 260 {
 261         struct nl_msg *msg;
 262         int ret = -1;
 263         struct family_data res = { group, -ENOENT };
 264
 265         msg = nlmsg_alloc();
 266         if (!msg)
 267                 return -ENOMEM;
 268         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 269                     0, 0, CTRL_CMD_GETFAMILY, 0);
 270         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 271
 272         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 273         msg = NULL;
 274         if (ret == 0)
 275                 ret = res.id;
 276
 277 nla_put_failure:
 278         nlmsg_free(msg);
 279         return ret;
 280 }
 281
 282
 283 #ifdef HOSTAPD
 284 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 285                         const char *ifname, u8 *addr)
 286 {
 287         struct ifreq ifr;
 288
 289         os_memset(&ifr, 0, sizeof(ifr));
 290         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 291         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 292                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 293                            ifname, errno, strerror(errno));
 294                 return -1;
 295         }
 296
 297         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 298                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 299                            ifname, ifr.ifr_hwaddr.sa_family);
 300                 return -1;
 301         }
 302         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 303
 304         return 0;
 305 }
 306
 307
 308 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 309                         const char *ifname, const u8 *addr)
 310 {
 311         struct ifreq ifr;
 312
 313         os_memset(&ifr, 0, sizeof(ifr));
 314         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 315         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 316         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 317
 318         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 319                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 320                            ifname, errno, strerror(errno));
 321                 return -1;
 322         }
 323
 324         return 0;
 325 }
 326 #endif /* HOSTAPD */
 327
 328
 329 #ifndef HOSTAPD
 330
 331 static int wpa_driver_nl80211_send_oper_ifla(
 332         struct wpa_driver_nl80211_data *drv,
 333         int linkmode, int operstate)
 334 {
 335         struct {
 336                 struct nlmsghdr hdr;
 337                 struct ifinfomsg ifinfo;
 338                 char opts[16];
 339         } req;
 340         struct rtattr *rta;
 341         static int nl_seq;
 342         ssize_t ret;
 343
 344         os_memset(&req, 0, sizeof(req));
 345
 346         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 347         req.hdr.nlmsg_type = RTM_SETLINK;
 348         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 349         req.hdr.nlmsg_seq = ++nl_seq;
 350         req.hdr.nlmsg_pid = 0;
 351
 352         req.ifinfo.ifi_family = AF_UNSPEC;
 353         req.ifinfo.ifi_type = 0;
 354         req.ifinfo.ifi_index = drv->ifindex;
 355         req.ifinfo.ifi_flags = 0;
 356         req.ifinfo.ifi_change = 0;
 357
 358         if (linkmode != -1) {
 359                 rta = (struct rtattr *)
 360                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 361                 rta->rta_type = IFLA_LINKMODE;
 362                 rta->rta_len = RTA_LENGTH(sizeof(char));
 363                 *((char *) RTA_DATA(rta)) = linkmode;
 364                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 365                         RTA_LENGTH(sizeof(char));
 366         }
 367         if (operstate != -1) {
 368                 rta = (struct rtattr *)
 369                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 370                 rta->rta_type = IFLA_OPERSTATE;
 371                 rta->rta_len = RTA_LENGTH(sizeof(char));
 372                 *((char *) RTA_DATA(rta)) = operstate;
 373                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 374                         RTA_LENGTH(sizeof(char));
 375         }
 376
 377         wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
 378                    linkmode, operstate);
 379
 380         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 381         if (ret < 0) {
 382                 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
 383                            " %s (assume operstate is not supported)",
 384                            strerror(errno));
 385         }
 386
 387         return ret < 0 ? -1 : 0;
 388 }
 389
 390
 391 #ifndef NO_WEXT
 392 static int wpa_driver_nl80211_set_auth_param(
 393         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 394 {
 395         struct iwreq iwr;
 396         int ret = 0;
 397
 398         os_memset(&iwr, 0, sizeof(iwr));
 399         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 400         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 401         iwr.u.param.value = value;
 402
 403         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 404                 if (errno != EOPNOTSUPP) {
 405                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 406                                    "value 0x%x) failed: %s)",
 407                                    idx, value, strerror(errno));
 408                 }
 409                 ret = errno == EOPNOTSUPP ? -2 : -1;
 410         }
 411
 412         return ret;
 413 }
 414 #endif /* NO_WEXT */
 415
 416
 417 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 418 {
 419         struct wpa_driver_nl80211_data *drv = priv;
 420         if (!drv->associated)
 421                 return -1;
 422         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 423         return 0;
 424 }
 425
 426
 427 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 428 {
 429         struct wpa_driver_nl80211_data *drv = priv;
 430         if (!drv->associated)
 431                 return -1;
 432         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 433         return drv->ssid_len;
 434 }
 435
 436
 437 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 438                                           void *ctx, char *buf, size_t len,
 439                                           int del)
 440 {
 441         union wpa_event_data event;
 442
 443         os_memset(&event, 0, sizeof(event));
 444         if (len > sizeof(event.interface_status.ifname))
 445                 len = sizeof(event.interface_status.ifname) - 1;
 446         os_memcpy(event.interface_status.ifname, buf, len);
 447         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 448                 EVENT_INTERFACE_ADDED;
 449
 450         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 451                    del ? "DEL" : "NEW",
 452                    event.interface_status.ifname,
 453                    del ? "removed" : "added");
 454
 455         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 456                 if (del)
 457                         drv->if_removed = 1;
 458                 else
 459                         drv->if_removed = 0;
 460         }
 461
 462         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 463 }
 464
 465
 466 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 467                                          struct nlmsghdr *h)
 468 {
 469         struct ifinfomsg *ifi;
 470         int attrlen, _nlmsg_len, rta_len;
 471         struct rtattr *attr;
 472
 473         ifi = NLMSG_DATA(h);
 474
 475         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 476
 477         attrlen = h->nlmsg_len - _nlmsg_len;
 478         if (attrlen < 0)
 479                 return 0;
 480
 481         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 482
 483         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 484         while (RTA_OK(attr, attrlen)) {
 485                 if (attr->rta_type == IFLA_IFNAME) {
 486                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 487                             == 0)
 488                                 return 1;
 489                         else
 490                                 break;
 491                 }
 492                 attr = RTA_NEXT(attr, attrlen);
 493         }
 494
 495         return 0;
 496 }
 497
 498
 499 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 500                                           int ifindex, struct nlmsghdr *h)
 501 {
 502         if (drv->ifindex == ifindex)
 503                 return 1;
 504
 505         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 506                 drv->ifindex = if_nametoindex(drv->ifname);
 507                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 508                            "interface");
 509                 wpa_driver_nl80211_finish_drv_init(drv);
 510                 return 1;
 511         }
 512
 513         return 0;
 514 }
 515
 516
 517 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 518                                               void *ctx, struct nlmsghdr *h,
 519                                               size_t len)
 520 {
 521         struct ifinfomsg *ifi;
 522         int attrlen, _nlmsg_len, rta_len;
 523         struct rtattr * attr;
 524
 525         if (len < sizeof(*ifi))
 526                 return;
 527
 528         ifi = NLMSG_DATA(h);
 529
 530         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 531                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 532                            ifi->ifi_index);
 533                 return;
 534         }
 535
 536         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 537                    "(%s%s%s%s)",
 538                    drv->operstate, ifi->ifi_flags,
 539                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 540                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 541                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 542                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 543         /*
 544          * Some drivers send the association event before the operup event--in
 545          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 546          * fails. This will hit us when wpa_supplicant does not need to do
 547          * IEEE 802.1X authentication
 548          */
 549         if (drv->operstate == 1 &&
 550             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 551             !(ifi->ifi_flags & IFF_RUNNING))
 552                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 553
 554         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 555
 556         attrlen = h->nlmsg_len - _nlmsg_len;
 557         if (attrlen < 0)
 558                 return;
 559
 560         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 561
 562         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 563         while (RTA_OK(attr, attrlen)) {
 564                 if (attr->rta_type == IFLA_IFNAME) {
 565                         wpa_driver_nl80211_event_link(
 566                                 drv, ctx,
 567                                 ((char *) attr) + rta_len,
 568                                 attr->rta_len - rta_len, 0);
 569                 }
 570                 attr = RTA_NEXT(attr, attrlen);
 571         }
 572 }
 573
 574
 575 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 576                                               void *ctx, struct nlmsghdr *h,
 577                                               size_t len)
 578 {
 579         struct ifinfomsg *ifi;
 580         int attrlen, _nlmsg_len, rta_len;
 581         struct rtattr * attr;
 582
 583         if (len < sizeof(*ifi))
 584                 return;
 585
 586         ifi = NLMSG_DATA(h);
 587
 588         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 589
 590         attrlen = h->nlmsg_len - _nlmsg_len;
 591         if (attrlen < 0)
 592                 return;
 593
 594         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 595
 596         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 597         while (RTA_OK(attr, attrlen)) {
 598                 if (attr->rta_type == IFLA_IFNAME) {
 599                         wpa_driver_nl80211_event_link(
 600                                 drv, ctx,
 601                                 ((char *) attr) + rta_len,
 602                                 attr->rta_len - rta_len, 1);
 603                 }
 604                 attr = RTA_NEXT(attr, attrlen);
 605         }
 606 }
 607
 608
 609 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 610                                                   void *sock_ctx)
 611 {
 612         char buf[8192];
 613         int left;
 614         struct sockaddr_nl from;
 615         socklen_t fromlen;
 616         struct nlmsghdr *h;
 617         int max_events = 10;
 618
 619 try_again:
 620         fromlen = sizeof(from);
 621         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 622                         (struct sockaddr *) &from, &fromlen);
 623         if (left < 0) {
 624                 if (errno != EINTR && errno != EAGAIN)
 625                         perror("recvfrom(netlink)");
 626                 return;
 627         }
 628
 629         h = (struct nlmsghdr *) buf;
 630         while (left >= (int) sizeof(*h)) {
 631                 int len, plen;
 632
 633                 len = h->nlmsg_len;
 634                 plen = len - sizeof(*h);
 635                 if (len > left || plen < 0) {
 636                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 637                                    "len=%d left=%d plen=%d",
 638                                    len, left, plen);
 639                         break;
 640                 }
 641
 642                 switch (h->nlmsg_type) {
 643                 case RTM_NEWLINK:
 644                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 645                                                           h, plen);
 646                         break;
 647                 case RTM_DELLINK:
 648                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 649                                                           h, plen);
 650                         break;
 651                 }
 652
 653                 len = NLMSG_ALIGN(len);
 654                 left -= len;
 655                 h = (struct nlmsghdr *) ((char *) h + len);
 656         }
 657
 658         if (left > 0) {
 659                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 660                            "message", left);
 661         }
 662
 663         if (--max_events > 0) {
 664                 /*
 665                  * Try to receive all events in one eloop call in order to
 666                  * limit race condition on cases where AssocInfo event, Assoc
 667                  * event, and EAPOL frames are received more or less at the
 668                  * same time. We want to process the event messages first
 669                  * before starting EAPOL processing.
 670                  */
 671                 goto try_again;
 672         }
 673 }
 674
 675
 676 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 677                             const u8 *frame, size_t len)
 678 {
 679         const struct ieee80211_mgmt *mgmt;
 680         union wpa_event_data event;
 681
 682         mgmt = (const struct ieee80211_mgmt *) frame;
 683         if (len < 24 + sizeof(mgmt->u.auth)) {
 684                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 685                            "frame");
 686                 return;
 687         }
 688
 689         os_memset(&event, 0, sizeof(event));
 690         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 691         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 692         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 693         if (len > 24 + sizeof(mgmt->u.auth)) {
 694                 event.auth.ies = mgmt->u.auth.variable;
 695                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 696         }
 697
 698         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 699 }
 700
 701
 702 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 703                             const u8 *frame, size_t len)
 704 {
 705         const struct ieee80211_mgmt *mgmt;
 706         union wpa_event_data event;
 707         u16 status;
 708
 709         mgmt = (const struct ieee80211_mgmt *) frame;
 710         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 711                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 712                            "frame");
 713                 return;
 714         }
 715
 716         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 717         if (status != WLAN_STATUS_SUCCESS) {
 718                 os_memset(&event, 0, sizeof(event));
 719                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 720                         event.assoc_reject.resp_ies =
 721                                 (u8 *) mgmt->u.assoc_resp.variable;
 722                         event.assoc_reject.resp_ies_len =
 723                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 724                 }
 725                 event.assoc_reject.status_code = status;
 726
 727                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 728                 return;
 729         }
 730
 731         drv->associated = 1;
 732         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 733
 734         os_memset(&event, 0, sizeof(event));
 735         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 736                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 737                 event.assoc_info.resp_ies_len =
 738                         len - 24 - sizeof(mgmt->u.assoc_resp);
 739         }
 740
 741         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 742 }
 743
 744 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 745                                enum nl80211_commands cmd, struct nlattr *status,
 746                                struct nlattr *addr, struct nlattr *req_ie,
 747                                struct nlattr *resp_ie)
 748 {
 749         union wpa_event_data event;
 750
 751         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 752                 /*
 753                  * Avoid reporting two association events that would confuse
 754                  * the core code.
 755                  */
 756                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 757                            "when using userspace SME", cmd);
 758                 return;
 759         }
 760
 761         os_memset(&event, 0, sizeof(event));
 762         if (cmd == NL80211_CMD_CONNECT &&
 763             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 764                 if (resp_ie) {
 765                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 766                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 767                 }
 768                 event.assoc_reject.status_code = nla_get_u16(status);
 769                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 770                 return;
 771         }
 772
 773         drv->associated = 1;
 774         if (addr)
 775                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 776
 777         if (req_ie) {
 778                 event.assoc_info.req_ies = nla_data(req_ie);
 779                 event.assoc_info.req_ies_len = nla_len(req_ie);
 780         }
 781         if (resp_ie) {
 782                 event.assoc_info.resp_ies = nla_data(resp_ie);
 783                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 784         }
 785
 786         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 787 }
 788
 789 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 790                                enum nl80211_commands cmd, struct nlattr *addr)
 791 {
 792         union wpa_event_data event;
 793         enum wpa_event_type ev;
 794
 795         if (nla_len(addr) != ETH_ALEN)
 796                 return;
 797
 798         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 799                    cmd, MAC2STR((u8 *) nla_data(addr)));
 800
 801         if (cmd == NL80211_CMD_AUTHENTICATE)
 802                 ev = EVENT_AUTH_TIMED_OUT;
 803         else if (cmd == NL80211_CMD_ASSOCIATE)
 804                 ev = EVENT_ASSOC_TIMED_OUT;
 805         else
 806                 return;
 807
 808         os_memset(&event, 0, sizeof(event));
 809         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 810         wpa_supplicant_event(drv->ctx, ev, &event);
 811 }
 812
 813
 814 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 815                        enum nl80211_commands cmd, struct nlattr *frame,
 816                        struct nlattr *addr, struct nlattr *timed_out)
 817 {
 818         if (timed_out && addr) {
 819                 mlme_timeout_event(drv, cmd, addr);
 820                 return;
 821         }
 822
 823         if (frame == NULL) {
 824                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 825                            "data", cmd);
 826                 return;
 827         }
 828
 829         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 830         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 831                     nla_data(frame), nla_len(frame));
 832
 833         switch (cmd) {
 834         case NL80211_CMD_AUTHENTICATE:
 835                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 836                 break;
 837         case NL80211_CMD_ASSOCIATE:
 838                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 839                 break;
 840         case NL80211_CMD_DEAUTHENTICATE:
 841                 drv->associated = 0;
 842                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 843                 break;
 844         case NL80211_CMD_DISASSOCIATE:
 845                 drv->associated = 0;
 846                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 847                 break;
 848         default:
 849                 break;
 850         }
 851 }
 852
 853 #endif /* HOSTAPD */
 854
 855
 856 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 857                                            struct nlattr *tb[])
 858 {
 859         union wpa_event_data data;
 860
 861         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 862         os_memset(&data, 0, sizeof(data));
 863         if (tb[NL80211_ATTR_MAC]) {
 864                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 865                             nla_data(tb[NL80211_ATTR_MAC]),
 866                             nla_len(tb[NL80211_ATTR_MAC]));
 867                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 868         }
 869         if (tb[NL80211_ATTR_KEY_SEQ]) {
 870                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 871                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 872                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 873         }
 874         if (tb[NL80211_ATTR_KEY_TYPE]) {
 875                 enum nl80211_key_type key_type =
 876                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 877                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 878                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 879                         data.michael_mic_failure.unicast = 1;
 880         } else
 881                 data.michael_mic_failure.unicast = 1;
 882
 883         if (tb[NL80211_ATTR_KEY_IDX]) {
 884                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 885                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 886         }
 887
 888         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 889 }
 890
 891
 892 static int process_event(struct nl_msg *msg, void *arg)
 893 {
 894         struct wpa_driver_nl80211_data *drv = arg;
 895         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 896         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 897
 898         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 899                   genlmsg_attrlen(gnlh, 0), NULL);
 900
 901         if (tb[NL80211_ATTR_IFINDEX]) {
 902                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 903                 if (ifindex != drv->ifindex) {
 904                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 905                                    " for foreign interface (ifindex %d)",
 906                                    gnlh->cmd, ifindex);
 907                         return NL_SKIP;
 908                 }
 909         }
 910
 911         if (drv->ap_scan_as_station &&
 912             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 913              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 914                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 915                 drv->ap_scan_as_station = 0;
 916         }
 917
 918         switch (gnlh->cmd) {
 919         case NL80211_CMD_NEW_SCAN_RESULTS:
 920                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 921                 drv->scan_complete_events = 1;
 922                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 923                                      drv->ctx);
 924                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 925                 break;
 926         case NL80211_CMD_SCAN_ABORTED:
 927                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 928                 /*
 929                  * Need to indicate that scan results are available in order
 930                  * not to make wpa_supplicant stop its scanning.
 931                  */
 932                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 933                                      drv->ctx);
 934                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 935                 break;
 936 #ifndef HOSTAPD
 937         case NL80211_CMD_AUTHENTICATE:
 938         case NL80211_CMD_ASSOCIATE:
 939         case NL80211_CMD_DEAUTHENTICATE:
 940         case NL80211_CMD_DISASSOCIATE:
 941                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 942                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
 943                 break;
 944         case NL80211_CMD_CONNECT:
 945         case NL80211_CMD_ROAM:
 946                 mlme_event_connect(drv, gnlh->cmd,
 947                                    tb[NL80211_ATTR_STATUS_CODE],
 948                                    tb[NL80211_ATTR_MAC],
 949                                    tb[NL80211_ATTR_REQ_IE],
 950                                    tb[NL80211_ATTR_RESP_IE]);
 951                 break;
 952         case NL80211_CMD_DISCONNECT:
 953                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 954                         /*
 955                          * Avoid reporting two disassociation events that could
 956                          * confuse the core code.
 957                          */
 958                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 959                                    "event when using userspace SME");
 960                         break;
 961                 }
 962                 drv->associated = 0;
 963                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 964                 break;
 965 #endif /* HOSTAPD */
 966         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 967                 mlme_event_michael_mic_failure(drv, tb);
 968                 break;
 969         default:
 970                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 971                            "(cmd=%d)", gnlh->cmd);
 972                 break;
 973         }
 974
 975         return NL_SKIP;
 976 }
 977
 978
 979 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 980                                              void *sock_ctx)
 981 {
 982         struct nl_cb *cb;
 983         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 984
 985         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 986
 987         cb = nl_cb_clone(drv->nl_cb);
 988         if (!cb)
 989                 return;
 990         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 991         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 992         nl_recvmsgs(drv->nl_handle_event, cb);
 993         nl_cb_put(cb);
 994 }
 995
 996
 997 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 998                                    const char *ifname, int dev_up)
 999 {
1000         struct ifreq ifr;
1001
1002         if (drv->ioctl_sock < 0)
1003                 return -1;
1004
1005         os_memset(&ifr, 0, sizeof(ifr));
1006         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1007
1008         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
1009                 perror("ioctl[SIOCGIFFLAGS]");
1010                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
1011                            ifname);
1012                 return -1;
1013         }
1014
1015         if (dev_up) {
1016                 if (ifr.ifr_flags & IFF_UP)
1017                         return 0;
1018                 ifr.ifr_flags |= IFF_UP;
1019         } else {
1020                 if (!(ifr.ifr_flags & IFF_UP))
1021                         return 0;
1022                 ifr.ifr_flags &= ~IFF_UP;
1023         }
1024
1025         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
1026                 perror("ioctl[SIOCSIFFLAGS]");
1027                 return -1;
1028         }
1029
1030         return 0;
1031 }
1032
1033
1034 /**
1035  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1036  * @priv: driver_nl80211 private data
1037  * @alpha2_arg: country to which to switch to
1038  * Returns: 0 on success, -1 on failure
1039  *
1040  * This asks nl80211 to set the regulatory domain for given
1041  * country ISO / IEC alpha2.
1042  */
1043 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1044 {
1045         struct wpa_driver_nl80211_data *drv = priv;
1046         char alpha2[3];
1047         struct nl_msg *msg;
1048
1049         msg = nlmsg_alloc();
1050         if (!msg)
1051                 return -ENOMEM;
1052
1053         alpha2[0] = alpha2_arg[0];
1054         alpha2[1] = alpha2_arg[1];
1055         alpha2[2] = '\0';
1056
1057         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1058                     0, NL80211_CMD_REQ_SET_REG, 0);
1059
1060         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1061         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1062                 return -EINVAL;
1063         return 0;
1064 nla_put_failure:
1065         return -EINVAL;
1066 }
1067
1068
1069 #ifndef HOSTAPD
1070 struct wiphy_info_data {
1071         int max_scan_ssids;
1072         int ap_supported;
1073         int auth_supported;
1074         int connect_supported;
1075 };
1076
1077
1078 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1079 {
1080         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1081         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1082         struct wiphy_info_data *info = arg;
1083
1084         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1085                   genlmsg_attrlen(gnlh, 0), NULL);
1086
1087         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1088                 info->max_scan_ssids =
1089                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1090
1091         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1092                 struct nlattr *nl_mode;
1093                 int i;
1094                 nla_for_each_nested(nl_mode,
1095                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1096                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1097                                 info->ap_supported = 1;
1098                                 break;
1099                         }
1100                 }
1101         }
1102
1103         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1104                 struct nlattr *nl_cmd;
1105                 int i;
1106
1107                 nla_for_each_nested(nl_cmd,
1108                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1109                         u32 cmd = nla_get_u32(nl_cmd);
1110                         if (cmd == NL80211_CMD_AUTHENTICATE)
1111                                 info->auth_supported = 1;
1112                         else if (cmd == NL80211_CMD_CONNECT)
1113                                 info->connect_supported = 1;
1114                 }
1115         }
1116
1117         return NL_SKIP;
1118 }
1119
1120
1121 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1122                                        struct wiphy_info_data *info)
1123 {
1124         struct nl_msg *msg;
1125
1126         os_memset(info, 0, sizeof(*info));
1127         msg = nlmsg_alloc();
1128         if (!msg)
1129                 return -1;
1130
1131         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1132                     0, NL80211_CMD_GET_WIPHY, 0);
1133
1134         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1135
1136         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1137                 return 0;
1138         msg = NULL;
1139 nla_put_failure:
1140         nlmsg_free(msg);
1141         return -1;
1142 }
1143
1144
1145 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1146 {
1147         struct wiphy_info_data info;
1148         if (wpa_driver_nl80211_get_info(drv, &info))
1149                 return -1;
1150         drv->has_capability = 1;
1151         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1152         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1153                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1154                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1155                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1156         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1157                 WPA_DRIVER_CAPA_ENC_WEP104 |
1158                 WPA_DRIVER_CAPA_ENC_TKIP |
1159                 WPA_DRIVER_CAPA_ENC_CCMP;
1160
1161         drv->capa.max_scan_ssids = info.max_scan_ssids;
1162         if (info.ap_supported)
1163                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1164
1165         if (info.auth_supported)
1166                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1167         else if (!info.connect_supported) {
1168                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1169                            "authentication/association or connect commands");
1170                 return -1;
1171         }
1172
1173         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1174
1175         return 0;
1176 }
1177 #endif /* HOSTAPD */
1178
1179
1180 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1181                                       void *ctx)
1182 {
1183         int ret;
1184
1185         /* Initialize generic netlink and nl80211 */
1186
1187         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1188         if (drv->nl_cb == NULL) {
1189                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1190                            "callbacks");
1191                 goto err1;
1192         }
1193
1194         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1195         if (drv->nl_handle == NULL) {
1196                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1197                            "callbacks");
1198                 goto err2;
1199         }
1200
1201         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1202         if (drv->nl_handle_event == NULL) {
1203                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1204                            "callbacks (event)");
1205                 goto err2b;
1206         }
1207
1208         if (genl_connect(drv->nl_handle)) {
1209                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1210                            "netlink");
1211                 goto err3;
1212         }
1213
1214         if (genl_connect(drv->nl_handle_event)) {
1215                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1216                            "netlink (event)");
1217                 goto err3;
1218         }
1219
1220 #ifdef CONFIG_LIBNL20
1221         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1222                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1223                            "netlink cache");
1224                 goto err3;
1225         }
1226         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1227             0) {
1228                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1229                            "netlink cache (event)");
1230                 goto err3b;
1231         }
1232 #else /* CONFIG_LIBNL20 */
1233         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1234         if (drv->nl_cache == NULL) {
1235                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1236                            "netlink cache");
1237                 goto err3;
1238         }
1239         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1240         if (drv->nl_cache_event == NULL) {
1241                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1242                            "netlink cache (event)");
1243                 goto err3b;
1244         }
1245 #endif /* CONFIG_LIBNL20 */
1246
1247         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1248         if (drv->nl80211 == NULL) {
1249                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1250                            "found");
1251                 goto err4;
1252         }
1253
1254         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1255         if (ret >= 0)
1256                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1257         if (ret < 0) {
1258                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1259                            "membership for scan events: %d (%s)",
1260                            ret, strerror(-ret));
1261                 goto err4;
1262         }
1263
1264         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1265         if (ret >= 0)
1266                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1267         if (ret < 0) {
1268                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1269                            "membership for mlme events: %d (%s)",
1270                            ret, strerror(-ret));
1271                 goto err4;
1272         }
1273
1274         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1275                                  wpa_driver_nl80211_event_receive, drv, ctx);
1276
1277         return 0;
1278
1279 err4:
1280         nl_cache_free(drv->nl_cache_event);
1281 err3b:
1282         nl_cache_free(drv->nl_cache);
1283 err3:
1284         nl_handle_destroy(drv->nl_handle_event);
1285 err2b:
1286         nl_handle_destroy(drv->nl_handle);
1287 err2:
1288         nl_cb_put(drv->nl_cb);
1289 err1:
1290         return -1;
1291 }
1292
1293
1294 static int wpa_driver_nl80211_init_link_events(
1295         struct wpa_driver_nl80211_data *drv)
1296 {
1297 #ifdef HOSTAPD
1298         return 0;
1299 #else /* HOSTAPD */
1300         int s;
1301         struct sockaddr_nl local;
1302
1303         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1304         if (s < 0) {
1305                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1306                 return -1;
1307         }
1308
1309         os_memset(&local, 0, sizeof(local));
1310         local.nl_family = AF_NETLINK;
1311         local.nl_groups = RTMGRP_LINK;
1312         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1313                 perror("bind(netlink)");
1314                 close(s);
1315                 return -1;
1316         }
1317
1318         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1319                                  drv->ctx);
1320         drv->link_event_sock = s;
1321
1322         return 0;
1323 #endif /* HOSTAPD */
1324 }
1325
1326
1327 /**
1328  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1329  * @ctx: context to be used when calling wpa_supplicant functions,
1330  * e.g., wpa_supplicant_event()
1331  * @ifname: interface name, e.g., wlan0
1332  * Returns: Pointer to private data, %NULL on failure
1333  */
1334 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1335 {
1336         struct wpa_driver_nl80211_data *drv;
1337
1338         drv = os_zalloc(sizeof(*drv));
1339         if (drv == NULL)
1340                 return NULL;
1341         drv->ctx = ctx;
1342         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1343         drv->monitor_ifidx = -1;
1344         drv->monitor_sock = -1;
1345         drv->link_event_sock = -1;
1346         drv->ioctl_sock = -1;
1347
1348         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1349                 os_free(drv);
1350                 return NULL;
1351         }
1352
1353         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1354         if (drv->ioctl_sock < 0) {
1355                 perror("socket(PF_INET,SOCK_DGRAM)");
1356                 goto failed;
1357         }
1358
1359         if (wpa_driver_nl80211_init_link_events(drv) ||
1360             wpa_driver_nl80211_finish_drv_init(drv))
1361                 goto failed;
1362
1363         return drv;
1364
1365 failed:
1366         if (drv->link_event_sock >= 0) {
1367                 eloop_unregister_read_sock(drv->link_event_sock);
1368                 close(drv->link_event_sock);
1369         }
1370         if (drv->ioctl_sock >= 0)
1371                 close(drv->ioctl_sock);
1372
1373         genl_family_put(drv->nl80211);
1374         nl_cache_free(drv->nl_cache);
1375         nl_handle_destroy(drv->nl_handle);
1376         nl_cb_put(drv->nl_cb);
1377
1378         os_free(drv);
1379         return NULL;
1380 }
1381
1382
1383 static int
1384 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1385 {
1386         drv->ifindex = if_nametoindex(drv->ifname);
1387
1388 #ifndef HOSTAPD
1389         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1390                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1391                            "use managed mode");
1392         }
1393
1394         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1395                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1396                            "UP", drv->ifname);
1397                 return -1;
1398         }
1399
1400         if (wpa_driver_nl80211_capa(drv))
1401                 return -1;
1402
1403         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1404 #endif /* HOSTAPD */
1405
1406         return 0;
1407 }
1408
1409
1410 #ifdef HOSTAPD
1411 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1412 {
1413         struct i802_bss *bss, *prev;
1414         bss = drv->bss.next;
1415         while (bss) {
1416                 prev = bss;
1417                 bss = bss->next;
1418                 os_free(bss);
1419         }
1420 }
1421 #endif /* HOSTAPD */
1422
1423
1424 #if defined(CONFIG_AP) || defined(HOSTAPD)
1425 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1426 {
1427         struct nl_msg *msg;
1428
1429         msg = nlmsg_alloc();
1430         if (!msg)
1431                 return -ENOMEM;
1432
1433         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1434                     0, NL80211_CMD_DEL_BEACON, 0);
1435         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1436
1437         return send_and_recv_msgs(drv, msg, NULL, NULL);
1438  nla_put_failure:
1439         return -ENOBUFS;
1440 }
1441 #endif /* CONFIG_AP || HOSTAPD */
1442
1443
1444 /**
1445  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1446  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1447  *
1448  * Shut down driver interface and processing of driver events. Free
1449  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1450  */
1451 static void wpa_driver_nl80211_deinit(void *priv)
1452 {
1453         struct wpa_driver_nl80211_data *drv = priv;
1454
1455 #if defined(CONFIG_AP) || defined(HOSTAPD)
1456         nl80211_remove_monitor_interface(drv);
1457         if (drv->monitor_sock >= 0) {
1458                 eloop_unregister_read_sock(drv->monitor_sock);
1459                 close(drv->monitor_sock);
1460         }
1461
1462         if (drv->nlmode == NL80211_IFTYPE_AP)
1463                 wpa_driver_nl80211_del_beacon(drv);
1464 #endif /* CONFIG_AP || HOSTAPD */
1465
1466 #ifdef HOSTAPD
1467         if (drv->last_freq_ht) {
1468                 /* Clear HT flags from the driver */
1469                 struct hostapd_freq_params freq;
1470                 os_memset(&freq, 0, sizeof(freq));
1471                 freq.freq = drv->last_freq;
1472                 i802_set_freq(priv, &freq);
1473         }
1474
1475         if (drv->eapol_sock >= 0) {
1476                 eloop_unregister_read_sock(drv->eapol_sock);
1477                 close(drv->eapol_sock);
1478         }
1479
1480         if (drv->if_indices != drv->default_if_indices)
1481                 os_free(drv->if_indices);
1482
1483         wpa_driver_nl80211_free_bss(drv);
1484 #else /* HOSTAPD */
1485 #ifndef NO_WEXT
1486         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1487 #endif /* NO_WEXT */
1488
1489         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1490
1491         if (drv->link_event_sock >= 0) {
1492                 eloop_unregister_read_sock(drv->link_event_sock);
1493                 close(drv->link_event_sock);
1494         }
1495 #endif /* HOSTAPD */
1496
1497         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1498
1499         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1500         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1501
1502         if (drv->ioctl_sock >= 0)
1503                 close(drv->ioctl_sock);
1504
1505         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1506         genl_family_put(drv->nl80211);
1507         nl_cache_free(drv->nl_cache);
1508         nl_cache_free(drv->nl_cache_event);
1509         nl_handle_destroy(drv->nl_handle);
1510         nl_handle_destroy(drv->nl_handle_event);
1511         nl_cb_put(drv->nl_cb);
1512
1513         os_free(drv);
1514 }
1515
1516
1517 /**
1518  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1519  * @eloop_ctx: Driver private data
1520  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1521  *
1522  * This function can be used as registered timeout when starting a scan to
1523  * generate a scan completed event if the driver does not report this.
1524  */
1525 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1526 {
1527         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1528         if (drv->ap_scan_as_station) {
1529                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1530                 drv->ap_scan_as_station = 0;
1531         }
1532         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1533         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1534 }
1535
1536
1537 /**
1538  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1539  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1540  * @params: Scan parameters
1541  * Returns: 0 on success, -1 on failure
1542  */
1543 static int wpa_driver_nl80211_scan(void *priv,
1544                                    struct wpa_driver_scan_params *params)
1545 {
1546         struct wpa_driver_nl80211_data *drv = priv;
1547         int ret = 0, timeout;
1548         struct nl_msg *msg, *ssids, *freqs;
1549         size_t i;
1550
1551         msg = nlmsg_alloc();
1552         ssids = nlmsg_alloc();
1553         freqs = nlmsg_alloc();
1554         if (!msg || !ssids || !freqs) {
1555                 nlmsg_free(msg);
1556                 nlmsg_free(ssids);
1557                 nlmsg_free(freqs);
1558                 return -1;
1559         }
1560
1561         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1562                     NL80211_CMD_TRIGGER_SCAN, 0);
1563
1564         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1565
1566         for (i = 0; i < params->num_ssids; i++) {
1567                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1568                         params->ssids[i].ssid);
1569         }
1570         if (params->num_ssids)
1571                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1572
1573         if (params->extra_ies) {
1574                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1575                         params->extra_ies);
1576         }
1577
1578         if (params->freqs) {
1579                 for (i = 0; params->freqs[i]; i++)
1580                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1581                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1582         }
1583
1584         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1585         msg = NULL;
1586         if (ret) {
1587                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1588                            "(%s)", ret, strerror(-ret));
1589 #ifdef HOSTAPD
1590                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1591                         /*
1592                          * mac80211 does not allow scan requests in AP mode, so
1593                          * try to do this in station mode.
1594                          */
1595                         if (wpa_driver_nl80211_set_mode(drv,
1596                                                         IEEE80211_MODE_INFRA))
1597                                 goto nla_put_failure;
1598
1599                         if (wpa_driver_nl80211_scan(drv, params)) {
1600                                 wpa_driver_nl80211_set_mode(drv,
1601                                                             IEEE80211_MODE_AP);
1602                                 goto nla_put_failure;
1603                         }
1604
1605                         /* Restore AP mode when processing scan results */
1606                         drv->ap_scan_as_station = 1;
1607                         ret = 0;
1608                 } else
1609                         goto nla_put_failure;
1610 #else /* HOSTAPD */
1611                 goto nla_put_failure;
1612 #endif /* HOSTAPD */
1613         }
1614
1615         /* Not all drivers generate "scan completed" wireless event, so try to
1616          * read results after a timeout. */
1617         timeout = 10;
1618         if (drv->scan_complete_events) {
1619                 /*
1620                  * The driver seems to deliver events to notify when scan is
1621                  * complete, so use longer timeout to avoid race conditions
1622                  * with scanning and following association request.
1623                  */
1624                 timeout = 30;
1625         }
1626         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1627                    "seconds", ret, timeout);
1628         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1629         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1630                                drv, drv->ctx);
1631
1632 nla_put_failure:
1633         nlmsg_free(ssids);
1634         nlmsg_free(msg);
1635         nlmsg_free(freqs);
1636         return ret;
1637 }
1638
1639
1640 static int bss_info_handler(struct nl_msg *msg, void *arg)
1641 {
1642         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1643         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1644         struct nlattr *bss[NL80211_BSS_MAX + 1];
1645         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1646                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1647                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1648                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1649                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1650                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1651                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1652                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1653                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1654         };
1655         struct wpa_scan_results *res = arg;
1656         struct wpa_scan_res **tmp;
1657         struct wpa_scan_res *r;
1658         const u8 *ie;
1659         size_t ie_len;
1660
1661         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1662                   genlmsg_attrlen(gnlh, 0), NULL);
1663         if (!tb[NL80211_ATTR_BSS])
1664                 return NL_SKIP;
1665         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1666                              bss_policy))
1667                 return NL_SKIP;
1668         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1669                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1670                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1671         } else {
1672                 ie = NULL;
1673                 ie_len = 0;
1674         }
1675
1676         r = os_zalloc(sizeof(*r) + ie_len);
1677         if (r == NULL)
1678                 return NL_SKIP;
1679         if (bss[NL80211_BSS_BSSID])
1680                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1681                           ETH_ALEN);
1682         if (bss[NL80211_BSS_FREQUENCY])
1683                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1684         if (bss[NL80211_BSS_BEACON_INTERVAL])
1685                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1686         if (bss[NL80211_BSS_CAPABILITY])
1687                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1688         r->flags |= WPA_SCAN_NOISE_INVALID;
1689         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1690                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1691                 r->level /= 100; /* mBm to dBm */
1692                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1693         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1694                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1695                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1696         } else
1697                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1698         if (bss[NL80211_BSS_TSF])
1699                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1700         r->ie_len = ie_len;
1701         if (ie)
1702                 os_memcpy(r + 1, ie, ie_len);
1703
1704         tmp = os_realloc(res->res,
1705                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1706         if (tmp == NULL) {
1707                 os_free(r);
1708                 return NL_SKIP;
1709         }
1710         tmp[res->num++] = r;
1711         res->res = tmp;
1712
1713         return NL_SKIP;
1714 }
1715
1716
1717 /**
1718  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1719  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1720  * Returns: Scan results on success, -1 on failure
1721  */
1722 static struct wpa_scan_results *
1723 wpa_driver_nl80211_get_scan_results(void *priv)
1724 {
1725         struct wpa_driver_nl80211_data *drv = priv;
1726         struct nl_msg *msg;
1727         struct wpa_scan_results *res;
1728         int ret;
1729
1730         res = os_zalloc(sizeof(*res));
1731         if (res == NULL)
1732                 return 0;
1733         msg = nlmsg_alloc();
1734         if (!msg)
1735                 goto nla_put_failure;
1736
1737         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1738                     NL80211_CMD_GET_SCAN, 0);
1739         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1740
1741         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1742         msg = NULL;
1743         if (ret == 0) {
1744                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1745                            (unsigned long) res->num);
1746                 return res;
1747         }
1748         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1749                    "(%s)", ret, strerror(-ret));
1750 nla_put_failure:
1751         nlmsg_free(msg);
1752         wpa_scan_results_free(res);
1753         return NULL;
1754 }
1755
1756
1757 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1758                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1759                        const u8 *seq, size_t seq_len,
1760                        const u8 *key, size_t key_len)
1761 {
1762         struct nl_msg *msg;
1763         int ret;
1764
1765         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1766                    "set_tx=%d seq_len=%lu key_len=%lu",
1767                    __func__, ifindex, alg, addr, key_idx, set_tx,
1768                    (unsigned long) seq_len, (unsigned long) key_len);
1769
1770         msg = nlmsg_alloc();
1771         if (!msg)
1772                 return -ENOMEM;
1773
1774         if (alg == WPA_ALG_NONE) {
1775                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1776                             0, NL80211_CMD_DEL_KEY, 0);
1777         } else {
1778                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1779                             0, NL80211_CMD_NEW_KEY, 0);
1780                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1781                 switch (alg) {
1782                 case WPA_ALG_WEP:
1783                         if (key_len == 5)
1784                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1785                                             WLAN_CIPHER_SUITE_WEP40);
1786                         else
1787                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1788                                             WLAN_CIPHER_SUITE_WEP104);
1789                         break;
1790                 case WPA_ALG_TKIP:
1791                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1792                                     WLAN_CIPHER_SUITE_TKIP);
1793                         break;
1794                 case WPA_ALG_CCMP:
1795                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1796                                     WLAN_CIPHER_SUITE_CCMP);
1797                         break;
1798                 case WPA_ALG_IGTK:
1799                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1800                                     WLAN_CIPHER_SUITE_AES_CMAC);
1801                         break;
1802                 default:
1803                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1804                                    "algorithm %d", __func__, alg);
1805                         nlmsg_free(msg);
1806                         return -1;
1807                 }
1808         }
1809
1810         if (seq && seq_len)
1811                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1812
1813         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1814         {
1815                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1816                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1817         }
1818         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1819         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1820
1821         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1822         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1823                 ret = 0;
1824         if (ret)
1825                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1826                            ret, strerror(-ret));
1827
1828         /*
1829          * If we failed or don't need to set the default TX key (below),
1830          * we're done here.
1831          */
1832         if (ret || !set_tx || alg == WPA_ALG_NONE)
1833                 return ret;
1834 #ifdef HOSTAPD /* FIX: is this needed? */
1835         if (addr)
1836                 return ret;
1837 #endif /* HOSTAPD */
1838
1839         msg = nlmsg_alloc();
1840         if (!msg)
1841                 return -ENOMEM;
1842
1843         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1844                     0, NL80211_CMD_SET_KEY, 0);
1845         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1846         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1847         if (alg == WPA_ALG_IGTK)
1848                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1849         else
1850                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1851
1852         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1853         if (ret == -ENOENT)
1854                 ret = 0;
1855         if (ret)
1856                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1857                            "err=%d %s)", ret, strerror(-ret));
1858         return ret;
1859
1860 nla_put_failure:
1861         return -ENOBUFS;
1862 }
1863
1864
1865 #ifndef HOSTAPD
1866 static int nl_add_key(struct nl_msg *msg, wpa_alg alg,
1867                       int key_idx, int defkey,
1868                       const u8 *seq, size_t seq_len,
1869                       const u8 *key, size_t key_len)
1870 {
1871         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1872         if (!key_attr)
1873                 return -1;
1874
1875         if (defkey && alg == WPA_ALG_IGTK)
1876                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1877         else if (defkey)
1878                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1879
1880         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1881
1882         switch (alg) {
1883         case WPA_ALG_WEP:
1884                 if (key_len == 5)
1885                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1886                                     WLAN_CIPHER_SUITE_WEP40);
1887                 else
1888                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1889                                     WLAN_CIPHER_SUITE_WEP104);
1890                 break;
1891         case WPA_ALG_TKIP:
1892                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1893                 break;
1894         case WPA_ALG_CCMP:
1895                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1896                 break;
1897         case WPA_ALG_IGTK:
1898                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1899                             WLAN_CIPHER_SUITE_AES_CMAC);
1900                 break;
1901         default:
1902                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1903                            "algorithm %d", __func__, alg);
1904                 return -1;
1905         }
1906
1907         if (seq && seq_len)
1908                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1909
1910         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1911
1912         nla_nest_end(msg, key_attr);
1913
1914         return 0;
1915  nla_put_failure:
1916         return -1;
1917 }
1918
1919
1920 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1921                                  struct nl_msg *msg)
1922 {
1923         int i, privacy = 0;
1924         struct nlattr *nl_keys, *nl_key;
1925
1926         for (i = 0; i < 4; i++) {
1927                 if (!params->wep_key[i])
1928                         continue;
1929                 privacy = 1;
1930                 break;
1931         }
1932         if (!privacy)
1933                 return 0;
1934
1935         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1936
1937         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1938         if (!nl_keys)
1939                 goto nla_put_failure;
1940
1941         for (i = 0; i < 4; i++) {
1942                 if (!params->wep_key[i])
1943                         continue;
1944
1945                 nl_key = nla_nest_start(msg, i);
1946                 if (!nl_key)
1947                         goto nla_put_failure;
1948
1949                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1950                         params->wep_key[i]);
1951                 if (params->wep_key_len[i] == 5)
1952                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1953                                     WLAN_CIPHER_SUITE_WEP40);
1954                 else
1955                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1956                                     WLAN_CIPHER_SUITE_WEP104);
1957
1958                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1959
1960                 if (i == params->wep_tx_keyidx)
1961                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1962
1963                 nla_nest_end(msg, nl_key);
1964         }
1965         nla_nest_end(msg, nl_keys);
1966
1967         return 0;
1968
1969 nla_put_failure:
1970         return -ENOBUFS;
1971 }
1972
1973
1974 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1975                                       const u8 *addr, int key_idx,
1976                                       int set_tx, const u8 *seq,
1977                                       size_t seq_len,
1978                                       const u8 *key, size_t key_len)
1979 {
1980         struct wpa_driver_nl80211_data *drv = priv;
1981         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1982                            seq_len, key, key_len);
1983 }
1984
1985
1986 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1987                                    const u8 *addr, int cmd, u16 reason_code)
1988 {
1989         int ret = -1;
1990         struct nl_msg *msg;
1991
1992         msg = nlmsg_alloc();
1993         if (!msg)
1994                 return -1;
1995
1996         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1997
1998         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1999         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2000         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2001
2002         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2003         msg = NULL;
2004         if (ret) {
2005                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2006                            "(%s)", ret, strerror(-ret));
2007                 goto nla_put_failure;
2008         }
2009         ret = 0;
2010
2011 nla_put_failure:
2012         nlmsg_free(msg);
2013         return ret;
2014 }
2015
2016
2017 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2018                                          const u8 *addr, int reason_code)
2019 {
2020         wpa_printf(MSG_DEBUG, "%s", __func__);
2021         drv->associated = 0;
2022         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2023                                        reason_code);
2024 }
2025
2026
2027 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2028                                              int reason_code)
2029 {
2030         struct wpa_driver_nl80211_data *drv = priv;
2031         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2032                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2033         wpa_printf(MSG_DEBUG, "%s", __func__);
2034         drv->associated = 0;
2035         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2036                                        reason_code);
2037 }
2038
2039
2040 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2041                                            int reason_code)
2042 {
2043         struct wpa_driver_nl80211_data *drv = priv;
2044         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2045                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2046         wpa_printf(MSG_DEBUG, "%s", __func__);
2047         drv->associated = 0;
2048         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2049                                        reason_code);
2050 }
2051
2052
2053 static int wpa_driver_nl80211_authenticate(
2054         void *priv, struct wpa_driver_auth_params *params)
2055 {
2056         struct wpa_driver_nl80211_data *drv = priv;
2057         int ret = -1, i;
2058         struct nl_msg *msg;
2059         enum nl80211_auth_type type;
2060
2061         drv->associated = 0;
2062
2063         msg = nlmsg_alloc();
2064         if (!msg)
2065                 return -1;
2066
2067         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2068                    drv->ifindex);
2069
2070         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2071                     NL80211_CMD_AUTHENTICATE, 0);
2072
2073         for (i = 0; i < 4; i++) {
2074                 if (!params->wep_key[i])
2075                         continue;
2076                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
2077                                            i == params->wep_tx_keyidx, NULL, 0,
2078                                            params->wep_key[i],
2079                                            params->wep_key_len[i]);
2080                 if (params->wep_tx_keyidx != i)
2081                         continue;
2082                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2083                                params->wep_key[i], params->wep_key_len[i])) {
2084                         nlmsg_free(msg);
2085                         return -1;
2086                 }
2087         }
2088
2089         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2090         if (params->bssid) {
2091                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2092                            MAC2STR(params->bssid));
2093                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2094         }
2095         if (params->freq) {
2096                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2097                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2098         }
2099         if (params->ssid) {
2100                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2101                                   params->ssid, params->ssid_len);
2102                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2103                         params->ssid);
2104         }
2105         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2106         if (params->ie)
2107                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2108         /*
2109          * TODO: if multiple auth_alg options enabled, try them one by one if
2110          * the AP rejects authentication due to unknown auth alg
2111          */
2112         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2113                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2114         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2115                 type = NL80211_AUTHTYPE_SHARED_KEY;
2116         else if (params->auth_alg & AUTH_ALG_LEAP)
2117                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2118         else if (params->auth_alg & AUTH_ALG_FT)
2119                 type = NL80211_AUTHTYPE_FT;
2120         else
2121                 goto nla_put_failure;
2122         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2123         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2124
2125         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2126         msg = NULL;
2127         if (ret) {
2128                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2129                            "(%s)", ret, strerror(-ret));
2130                 goto nla_put_failure;
2131         }
2132         ret = 0;
2133         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2134                    "successfully");
2135
2136 nla_put_failure:
2137         nlmsg_free(msg);
2138         return ret;
2139 }
2140
2141 #endif /* HOSTAPD */
2142
2143
2144 #if defined(CONFIG_AP) || defined(HOSTAPD)
2145
2146 struct phy_info_arg {
2147         u16 *num_modes;
2148         struct hostapd_hw_modes *modes;
2149 };
2150
2151 static int phy_info_handler(struct nl_msg *msg, void *arg)
2152 {
2153         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2154         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2155         struct phy_info_arg *phy_info = arg;
2156
2157         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2158
2159         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2160         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2161                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2162                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2163                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2164                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2165                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2166                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2167         };
2168
2169         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2170         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2171                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2172                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2173         };
2174
2175         struct nlattr *nl_band;
2176         struct nlattr *nl_freq;
2177         struct nlattr *nl_rate;
2178         int rem_band, rem_freq, rem_rate;
2179         struct hostapd_hw_modes *mode;
2180         int idx, mode_is_set;
2181
2182         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2183                   genlmsg_attrlen(gnlh, 0), NULL);
2184
2185         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2186                 return NL_SKIP;
2187
2188         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2189                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2190                 if (!mode)
2191                         return NL_SKIP;
2192                 phy_info->modes = mode;
2193
2194                 mode_is_set = 0;
2195
2196                 mode = &phy_info->modes[*(phy_info->num_modes)];
2197                 memset(mode, 0, sizeof(*mode));
2198                 *(phy_info->num_modes) += 1;
2199
2200                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2201                           nla_len(nl_band), NULL);
2202
2203                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2204                         mode->ht_capab = nla_get_u16(
2205                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2206                 }
2207
2208                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2209                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2210                                   nla_len(nl_freq), freq_policy);
2211                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2212                                 continue;
2213                         mode->num_channels++;
2214                 }
2215
2216                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
2217                 if (!mode->channels)
2218                         return NL_SKIP;
2219
2220                 idx = 0;
2221
2222                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2223                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2224                                   nla_len(nl_freq), freq_policy);
2225                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2226                                 continue;
2227
2228                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2229                         mode->channels[idx].flag = 0;
2230
2231                         if (!mode_is_set) {
2232                                 /* crude heuristic */
2233                                 if (mode->channels[idx].freq < 4000)
2234                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2235                                 else
2236                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2237                                 mode_is_set = 1;
2238                         }
2239
2240                         /* crude heuristic */
2241                         if (mode->channels[idx].freq < 4000)
2242                                 if (mode->channels[idx].freq == 2484)
2243                                         mode->channels[idx].chan = 14;
2244                                 else
2245                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2246                         else
2247                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2248
2249                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2250                                 mode->channels[idx].flag |=
2251                                         HOSTAPD_CHAN_DISABLED;
2252                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2253                                 mode->channels[idx].flag |=
2254                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2255                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2256                                 mode->channels[idx].flag |=
2257                                         HOSTAPD_CHAN_NO_IBSS;
2258                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2259                                 mode->channels[idx].flag |=
2260                                         HOSTAPD_CHAN_RADAR;
2261
2262                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2263                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2264                                 mode->channels[idx].max_tx_power =
2265                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2266
2267                         idx++;
2268                 }
2269
2270                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2271                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2272                                   nla_len(nl_rate), rate_policy);
2273                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2274                                 continue;
2275                         mode->num_rates++;
2276                 }
2277
2278                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
2279                 if (!mode->rates)
2280                         return NL_SKIP;
2281
2282                 idx = 0;
2283
2284                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2285                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2286                                   nla_len(nl_rate), rate_policy);
2287                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2288                                 continue;
2289                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2290
2291                         /* crude heuristic */
2292                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2293                             mode->rates[idx].rate > 200)
2294                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2295
2296                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2297                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
2298
2299                         idx++;
2300                 }
2301         }
2302
2303         return NL_SKIP;
2304 }
2305
2306 static struct hostapd_hw_modes *
2307 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2308 {
2309         u16 m;
2310         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2311         int i, mode11g_idx = -1;
2312
2313         /* If only 802.11g mode is included, use it to construct matching
2314          * 802.11b mode data. */
2315
2316         for (m = 0; m < *num_modes; m++) {
2317                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2318                         return modes; /* 802.11b already included */
2319                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2320                         mode11g_idx = m;
2321         }
2322
2323         if (mode11g_idx < 0)
2324                 return modes; /* 2.4 GHz band not supported at all */
2325
2326         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2327         if (nmodes == NULL)
2328                 return modes; /* Could not add 802.11b mode */
2329
2330         mode = &nmodes[*num_modes];
2331         os_memset(mode, 0, sizeof(*mode));
2332         (*num_modes)++;
2333         modes = nmodes;
2334
2335         mode->mode = HOSTAPD_MODE_IEEE80211B;
2336
2337         mode11g = &modes[mode11g_idx];
2338         mode->num_channels = mode11g->num_channels;
2339         mode->channels = os_malloc(mode11g->num_channels *
2340                                    sizeof(struct hostapd_channel_data));
2341         if (mode->channels == NULL) {
2342                 (*num_modes)--;
2343                 return modes; /* Could not add 802.11b mode */
2344         }
2345         os_memcpy(mode->channels, mode11g->channels,
2346                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2347
2348         mode->num_rates = 0;
2349         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2350         if (mode->rates == NULL) {
2351                 os_free(mode->channels);
2352                 (*num_modes)--;
2353                 return modes; /* Could not add 802.11b mode */
2354         }
2355
2356         for (i = 0; i < mode11g->num_rates; i++) {
2357                 if (mode11g->rates[i].rate > 110 ||
2358                     mode11g->rates[i].flags &
2359                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2360                         continue;
2361                 mode->rates[mode->num_rates] = mode11g->rates[i];
2362                 mode->num_rates++;
2363                 if (mode->num_rates == 4)
2364                         break;
2365         }
2366
2367         if (mode->num_rates == 0) {
2368                 os_free(mode->channels);
2369                 os_free(mode->rates);
2370                 (*num_modes)--;
2371                 return modes; /* No 802.11b rates */
2372         }
2373
2374         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2375                    "information");
2376
2377         return modes;
2378 }
2379
2380
2381 static struct hostapd_hw_modes *
2382 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2383 {
2384         struct wpa_driver_nl80211_data *drv = priv;
2385         struct nl_msg *msg;
2386         struct phy_info_arg result = {
2387                 .num_modes = num_modes,
2388                 .modes = NULL,
2389         };
2390
2391         *num_modes = 0;
2392         *flags = 0;
2393
2394         msg = nlmsg_alloc();
2395         if (!msg)
2396                 return NULL;
2397
2398         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2399                     0, NL80211_CMD_GET_WIPHY, 0);
2400
2401         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2402
2403         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2404                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2405  nla_put_failure:
2406         return NULL;
2407 }
2408
2409
2410 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2411                                          const void *data, size_t len,
2412                                          int encrypt)
2413 {
2414         __u8 rtap_hdr[] = {
2415                 0x00, 0x00, /* radiotap version */
2416                 0x0e, 0x00, /* radiotap length */
2417                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2418                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2419                 0x00,       /* padding */
2420                 0x00, 0x00, /* RX and TX flags to indicate that */
2421                 0x00, 0x00, /* this is the injected frame directly */
2422         };
2423         struct iovec iov[2] = {
2424                 {
2425                         .iov_base = &rtap_hdr,
2426                         .iov_len = sizeof(rtap_hdr),
2427                 },
2428                 {
2429                         .iov_base = (void *) data,
2430                         .iov_len = len,
2431                 }
2432         };
2433         struct msghdr msg = {
2434                 .msg_name = NULL,
2435                 .msg_namelen = 0,
2436                 .msg_iov = iov,
2437                 .msg_iovlen = 2,
2438                 .msg_control = NULL,
2439                 .msg_controllen = 0,
2440                 .msg_flags = 0,
2441         };
2442
2443         if (encrypt)
2444                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2445
2446         return sendmsg(drv->monitor_sock, &msg, 0);
2447 }
2448
2449
2450 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2451                                         size_t data_len)
2452 {
2453         struct wpa_driver_nl80211_data *drv = priv;
2454         struct ieee80211_mgmt *mgmt;
2455         int encrypt = 1;
2456         u16 fc;
2457
2458         mgmt = (struct ieee80211_mgmt *) data;
2459         fc = le_to_host16(mgmt->frame_control);
2460
2461         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2462             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2463                 /*
2464                  * Only one of the authentication frame types is encrypted.
2465                  * In order for static WEP encryption to work properly (i.e.,
2466                  * to not encrypt the frame), we need to tell mac80211 about
2467                  * the frames that must not be encrypted.
2468                  */
2469                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2470                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2471                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2472                         encrypt = 0;
2473         }
2474
2475         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2476 }
2477
2478
2479 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2480                                                const u8 *head, size_t head_len,
2481                                                const u8 *tail, size_t tail_len,
2482                                                int dtim_period)
2483 {
2484         struct wpa_driver_nl80211_data *drv = priv;
2485         struct nl_msg *msg;
2486         u8 cmd = NL80211_CMD_NEW_BEACON;
2487         int ret;
2488         int beacon_set;
2489 #ifdef HOSTAPD
2490         struct i802_bss *bss;
2491
2492         bss = get_bss(drv, ifindex);
2493         if (bss == NULL)
2494                 return -ENOENT;
2495         beacon_set = bss->beacon_set;
2496 #else /* HOSTAPD */
2497         beacon_set = drv->beacon_set;
2498 #endif /* HOSTAPD */
2499
2500         msg = nlmsg_alloc();
2501         if (!msg)
2502                 return -ENOMEM;
2503
2504         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2505                    beacon_set);
2506         if (beacon_set)
2507                 cmd = NL80211_CMD_SET_BEACON;
2508
2509         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2510                     0, cmd, 0);
2511         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2512         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2513         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2514         if (!drv->beacon_int)
2515                 drv->beacon_int = 100;
2516         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2517         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2518
2519         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2520         if (ret) {
2521                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2522                            ret, strerror(-ret));
2523         } else {
2524 #ifdef HOSTAPD
2525                 bss->beacon_set = 1;
2526 #else /* HOSTAPD */
2527                 drv->beacon_set = 1;
2528 #endif /* HOSTAPD */
2529         }
2530         return ret;
2531  nla_put_failure:
2532         return -ENOBUFS;
2533 }
2534
2535
2536 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2537 {
2538         struct wpa_driver_nl80211_data *drv = priv;
2539         struct nl_msg *msg;
2540
2541         drv->beacon_int = value;
2542
2543 #ifdef HOSTAPD
2544         if (!drv->bss.beacon_set)
2545                 return 0;
2546 #else /* HOSTAPD */
2547         if (!drv->beacon_set)
2548                 return 0;
2549 #endif /* HOSTAPD */
2550
2551         msg = nlmsg_alloc();
2552         if (!msg)
2553                 return -ENOMEM;
2554
2555         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2556         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2557                     0, NL80211_CMD_SET_BEACON, 0);
2558         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2559
2560         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2561
2562         return send_and_recv_msgs(drv, msg, NULL, NULL);
2563  nla_put_failure:
2564         return -ENOBUFS;
2565 }
2566
2567
2568 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2569                                        int freq, int ht_enabled,
2570                                        int sec_channel_offset)
2571 {
2572         struct nl_msg *msg;
2573         int ret;
2574
2575         msg = nlmsg_alloc();
2576         if (!msg)
2577                 return -1;
2578
2579         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2580                     NL80211_CMD_SET_WIPHY, 0);
2581
2582         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2583         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2584         if (ht_enabled) {
2585                 switch (sec_channel_offset) {
2586                 case -1:
2587                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2588                                     NL80211_CHAN_HT40MINUS);
2589                         break;
2590                 case 1:
2591                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2592                                     NL80211_CHAN_HT40PLUS);
2593                         break;
2594                 default:
2595                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2596                                     NL80211_CHAN_HT20);
2597                         break;
2598                 }
2599         }
2600
2601         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2602         if (ret == 0)
2603                 return 0;
2604         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2605                    "%d (%s)", freq, ret, strerror(-ret));
2606 nla_put_failure:
2607         return -1;
2608 }
2609
2610
2611 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2612                                       struct hostapd_sta_add_params *params)
2613 {
2614         struct wpa_driver_nl80211_data *drv = priv;
2615         struct nl_msg *msg;
2616         int ret = -ENOBUFS;
2617
2618         msg = nlmsg_alloc();
2619         if (!msg)
2620                 return -ENOMEM;
2621
2622         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2623                     0, NL80211_CMD_NEW_STATION, 0);
2624
2625         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2626         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2627         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2628         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2629                 params->supp_rates);
2630         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2631                     params->listen_interval);
2632
2633 #ifdef CONFIG_IEEE80211N
2634         if (params->ht_capabilities) {
2635                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2636                         params->ht_capabilities->length,
2637                         &params->ht_capabilities->data);
2638         }
2639 #endif /* CONFIG_IEEE80211N */
2640
2641         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2642         if (ret)
2643                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2644                            "result: %d (%s)", ret, strerror(-ret));
2645         if (ret == -EEXIST)
2646                 ret = 0;
2647  nla_put_failure:
2648         return ret;
2649 }
2650
2651
2652 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2653 {
2654         struct wpa_driver_nl80211_data *drv = priv;
2655         struct nl_msg *msg;
2656         int ret;
2657
2658         msg = nlmsg_alloc();
2659         if (!msg)
2660                 return -ENOMEM;
2661
2662         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2663                     0, NL80211_CMD_DEL_STATION, 0);
2664
2665         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2666                     if_nametoindex(drv->ifname));
2667         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2668
2669         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2670         if (ret == -ENOENT)
2671                 return 0;
2672         return ret;
2673  nla_put_failure:
2674         return -ENOBUFS;
2675 }
2676
2677 #endif /* CONFIG_AP || HOSTAPD */
2678
2679
2680 #ifdef CONFIG_AP
2681
2682 static int wpa_driver_nl80211_set_beacon(void *priv,
2683                                          const u8 *head, size_t head_len,
2684                                          const u8 *tail, size_t tail_len,
2685                                          int dtim_period)
2686 {
2687         struct wpa_driver_nl80211_data *drv = priv;
2688         return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2689                                                    head, head_len,
2690                                                    tail, tail_len,
2691                                                    dtim_period);
2692 }
2693
2694 #endif /* CONFIG_AP */
2695
2696 #if defined(CONFIG_AP) || defined(HOSTAPD)
2697
2698 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2699                                  int ifidx)
2700 {
2701         struct nl_msg *msg;
2702
2703 #ifdef HOSTAPD
2704         /* stop listening for EAPOL on this interface */
2705         del_ifidx(drv, ifidx);
2706 #endif /* HOSTAPD */
2707
2708         msg = nlmsg_alloc();
2709         if (!msg)
2710                 goto nla_put_failure;
2711
2712         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2713                     0, NL80211_CMD_DEL_INTERFACE, 0);
2714         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2715
2716         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2717                 return;
2718  nla_put_failure:
2719         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2720                    ifidx);
2721 }
2722
2723
2724 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2725                                      const char *ifname,
2726                                      enum nl80211_iftype iftype,
2727                                      const u8 *addr)
2728 {
2729         struct nl_msg *msg, *flags = NULL;
2730         int ifidx;
2731         int ret = -ENOBUFS;
2732
2733         msg = nlmsg_alloc();
2734         if (!msg)
2735                 return -1;
2736
2737         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2738                     0, NL80211_CMD_NEW_INTERFACE, 0);
2739         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2740         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2741         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2742
2743         if (iftype == NL80211_IFTYPE_MONITOR) {
2744                 int err;
2745
2746                 flags = nlmsg_alloc();
2747                 if (!flags)
2748                         goto nla_put_failure;
2749
2750                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2751
2752                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2753
2754                 nlmsg_free(flags);
2755
2756                 if (err)
2757                         goto nla_put_failure;
2758         }
2759
2760         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2761         if (ret) {
2762  nla_put_failure:
2763                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2764                            ifname, ret, strerror(-ret));
2765                 return ret;
2766         }
2767
2768         ifidx = if_nametoindex(ifname);
2769
2770         if (ifidx <= 0)
2771                 return -1;
2772
2773 #ifdef HOSTAPD
2774         /* start listening for EAPOL on this interface */
2775         add_ifidx(drv, ifidx);
2776
2777         if (addr && iftype == NL80211_IFTYPE_AP &&
2778             set_ifhwaddr(drv, ifname, addr)) {
2779                 nl80211_remove_iface(drv, ifidx);
2780                 return -1;
2781         }
2782 #endif /* HOSTAPD */
2783
2784         return ifidx;
2785 }
2786 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2787                                 const char *ifname, enum nl80211_iftype iftype,
2788                                 const u8 *addr)
2789 {
2790         int ret;
2791
2792         ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2793
2794         /* if error occured and interface exists already */
2795         if (ret == -ENFILE && if_nametoindex(ifname)) {
2796                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2797
2798                 /* Try to remove the interface that was already there. */
2799                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2800
2801                 /* Try to create the interface again */
2802                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2803         }
2804
2805         return ret;
2806 }
2807
2808 #endif /* CONFIG_AP || HOSTAPD */
2809
2810 #ifdef CONFIG_AP
2811
2812 void ap_tx_status(void *ctx, const u8 *addr,
2813                   const u8 *buf, size_t len, int ack);
2814 void ap_rx_from_unknown_sta(void *ctx, struct ieee80211_hdr *hdr, size_t len);
2815 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2816                 struct hostapd_frame_info *fi);
2817 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2818
2819 #endif /* CONFIG_AP */
2820
2821 #if defined(CONFIG_AP) || defined(HOSTAPD)
2822
2823 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2824 {
2825         struct ieee80211_hdr *hdr;
2826         u16 fc, type, stype;
2827
2828         hdr = (struct ieee80211_hdr *) buf;
2829         fc = le_to_host16(hdr->frame_control);
2830
2831         type = WLAN_FC_GET_TYPE(fc);
2832         stype = WLAN_FC_GET_STYPE(fc);
2833
2834         switch (type) {
2835         case WLAN_FC_TYPE_MGMT:
2836                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2837                            ok ? "ACK" : "fail");
2838 #ifdef HOSTAPD
2839                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2840 #else /* HOSTAPD */
2841                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2842 #endif /* HOSTAPD */
2843                 break;
2844         case WLAN_FC_TYPE_CTRL:
2845                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2846                            ok ? "ACK" : "fail");
2847                 break;
2848         case WLAN_FC_TYPE_DATA:
2849 #ifdef HOSTAPD
2850                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2851 #else /* HOSTAPD */
2852                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2853 #endif /* HOSTAPD */
2854                 break;
2855         default:
2856                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2857                            type);
2858                 break;
2859         }
2860 }
2861
2862
2863 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2864                              struct ieee80211_hdr *hdr, size_t len)
2865 {
2866 #ifdef HOSTAPD
2867         hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2868 #else /* HOSTAPD */
2869         ap_rx_from_unknown_sta(drv->ctx, hdr, len);
2870 #endif /* HOSTAPD */
2871 }
2872
2873
2874 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2875                          u8 *buf, size_t len,
2876                          struct hostapd_frame_info *hfi)
2877 {
2878         struct ieee80211_hdr *hdr;
2879         u16 fc, stype;
2880
2881         hdr = (struct ieee80211_hdr *) buf;
2882         fc = le_to_host16(hdr->frame_control);
2883         stype = WLAN_FC_GET_STYPE(fc);
2884
2885         switch (WLAN_FC_GET_TYPE(fc)) {
2886         case WLAN_FC_TYPE_MGMT:
2887                 if (stype != WLAN_FC_STYPE_BEACON &&
2888                     stype != WLAN_FC_STYPE_PROBE_REQ)
2889                         wpa_printf(MSG_MSGDUMP, "MGMT");
2890 #ifdef HOSTAPD
2891                 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2892 #else /* HOSTAPD */
2893                 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2894 #endif /* HOSTAPD */
2895                 break;
2896         case WLAN_FC_TYPE_CTRL:
2897                 /* can only get here with PS-Poll frames */
2898                 wpa_printf(MSG_DEBUG, "CTRL");
2899                 from_unknown_sta(drv, hdr, len);
2900                 break;
2901         case WLAN_FC_TYPE_DATA:
2902                 from_unknown_sta(drv, hdr, len);
2903                 break;
2904         }
2905 }
2906
2907
2908 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2909 {
2910         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2911         int len;
2912         unsigned char buf[3000];
2913         struct ieee80211_radiotap_iterator iter;
2914         int ret;
2915         struct hostapd_frame_info hfi;
2916         int injected = 0, failed = 0, rxflags = 0;
2917
2918         len = recv(sock, buf, sizeof(buf), 0);
2919         if (len < 0) {
2920                 perror("recv");
2921                 return;
2922         }
2923
2924         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2925                 printf("received invalid radiotap frame\n");
2926                 return;
2927         }
2928
2929         memset(&hfi, 0, sizeof(hfi));
2930
2931         while (1) {
2932                 ret = ieee80211_radiotap_iterator_next(&iter);
2933                 if (ret == -ENOENT)
2934                         break;
2935                 if (ret) {
2936                         printf("received invalid radiotap frame (%d)\n", ret);
2937                         return;
2938                 }
2939                 switch (iter.this_arg_index) {
2940                 case IEEE80211_RADIOTAP_FLAGS:
2941                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2942                                 len -= 4;
2943                         break;
2944                 case IEEE80211_RADIOTAP_RX_FLAGS:
2945                         rxflags = 1;
2946                         break;
2947                 case IEEE80211_RADIOTAP_TX_FLAGS:
2948                         injected = 1;
2949                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2950                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2951                         break;
2952                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2953                         break;
2954                 case IEEE80211_RADIOTAP_CHANNEL:
2955                         /* TODO convert from freq/flags to channel number
2956                         hfi.channel = XXX;
2957                         hfi.phytype = XXX;
2958                          */
2959                         break;
2960                 case IEEE80211_RADIOTAP_RATE:
2961                         hfi.datarate = *iter.this_arg * 5;
2962                         break;
2963                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2964                         hfi.ssi_signal = *iter.this_arg;
2965                         break;
2966                 }
2967         }
2968
2969         if (rxflags && injected)
2970                 return;
2971
2972         if (!injected)
2973                 handle_frame(drv, buf + iter.max_length,
2974                              len - iter.max_length, &hfi);
2975         else
2976                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2977                                    len - iter.max_length, !failed);
2978 }
2979
2980
2981 /*
2982  * we post-process the filter code later and rewrite
2983  * this to the offset to the last instruction
2984  */
2985 #define PASS    0xFF
2986 #define FAIL    0xFE
2987
2988 static struct sock_filter msock_filter_insns[] = {
2989         /*
2990          * do a little-endian load of the radiotap length field
2991          */
2992         /* load lower byte into A */
2993         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2994         /* put it into X (== index register) */
2995         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2996         /* load upper byte into A */
2997         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2998         /* left-shift it by 8 */
2999         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3000         /* or with X */
3001         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3002         /* put result into X */
3003         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3004
3005         /*
3006          * Allow management frames through, this also gives us those
3007          * management frames that we sent ourselves with status
3008          */
3009         /* load the lower byte of the IEEE 802.11 frame control field */
3010         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3011         /* mask off frame type and version */
3012         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3013         /* accept frame if it's both 0, fall through otherwise */
3014         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3015
3016         /*
3017          * TODO: add a bit to radiotap RX flags that indicates
3018          * that the sending station is not associated, then
3019          * add a filter here that filters on our DA and that flag
3020          * to allow us to deauth frames to that bad station.
3021          *
3022          * Not a regression -- we didn't do it before either.
3023          */
3024
3025 #if 0
3026         /*
3027          * drop non-data frames, WDS frames
3028          */
3029         /* load the lower byte of the frame control field */
3030         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3031         /* mask off QoS bit */
3032         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3033         /* drop non-data frames */
3034         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3035         /* load the upper byte of the frame control field */
3036         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3037         /* mask off toDS/fromDS */
3038         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3039         /* drop WDS frames */
3040         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
3041 #endif
3042
3043         /*
3044          * add header length to index
3045          */
3046         /* load the lower byte of the frame control field */
3047         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3048         /* mask off QoS bit */
3049         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3050         /* right shift it by 6 to give 0 or 2 */
3051         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3052         /* add data frame header length */
3053         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3054         /* add index, was start of 802.11 header */
3055         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3056         /* move to index, now start of LL header */
3057         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3058
3059         /*
3060          * Accept empty data frames, we use those for
3061          * polling activity.
3062          */
3063         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3064         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3065
3066         /*
3067          * Accept EAPOL frames
3068          */
3069         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3070         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3071         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3072         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3073
3074         /* keep these last two statements or change the code below */
3075         /* return 0 == "DROP" */
3076         BPF_STMT(BPF_RET | BPF_K, 0),
3077         /* return ~0 == "keep all" */
3078         BPF_STMT(BPF_RET | BPF_K, ~0),
3079 };
3080
3081 static struct sock_fprog msock_filter = {
3082         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3083         .filter = msock_filter_insns,
3084 };
3085
3086
3087 static int add_monitor_filter(int s)
3088 {
3089         int idx;
3090
3091         /* rewrite all PASS/FAIL jump offsets */
3092         for (idx = 0; idx < msock_filter.len; idx++) {
3093                 struct sock_filter *insn = &msock_filter_insns[idx];
3094
3095                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3096                         if (insn->code == (BPF_JMP|BPF_JA)) {
3097                                 if (insn->k == PASS)
3098                                         insn->k = msock_filter.len - idx - 2;
3099                                 else if (insn->k == FAIL)
3100                                         insn->k = msock_filter.len - idx - 3;
3101                         }
3102
3103                         if (insn->jt == PASS)
3104                                 insn->jt = msock_filter.len - idx - 2;
3105                         else if (insn->jt == FAIL)
3106                                 insn->jt = msock_filter.len - idx - 3;
3107
3108                         if (insn->jf == PASS)
3109                                 insn->jf = msock_filter.len - idx - 2;
3110                         else if (insn->jf == FAIL)
3111                                 insn->jf = msock_filter.len - idx - 3;
3112                 }
3113         }
3114
3115         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3116                        &msock_filter, sizeof(msock_filter))) {
3117                 perror("SO_ATTACH_FILTER");
3118                 return -1;
3119         }
3120
3121         return 0;
3122 }
3123
3124
3125 static void nl80211_remove_monitor_interface(
3126         struct wpa_driver_nl80211_data *drv)
3127 {
3128         if (drv->monitor_ifidx >= 0) {
3129                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3130                 drv->monitor_ifidx = -1;
3131         }
3132 }
3133
3134
3135 static int
3136 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3137 {
3138         char buf[IFNAMSIZ];
3139         struct sockaddr_ll ll;
3140         int optval;
3141         socklen_t optlen;
3142
3143         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3144         buf[IFNAMSIZ - 1] = '\0';
3145
3146         drv->monitor_ifidx =
3147                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
3148
3149         if (drv->monitor_ifidx < 0)
3150                 return -1;
3151
3152         if (hostapd_set_iface_flags(drv, buf, 1))
3153                 goto error;
3154
3155         memset(&ll, 0, sizeof(ll));
3156         ll.sll_family = AF_PACKET;
3157         ll.sll_ifindex = drv->monitor_ifidx;
3158         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3159         if (drv->monitor_sock < 0) {
3160                 perror("socket[PF_PACKET,SOCK_RAW]");
3161                 goto error;
3162         }
3163
3164         if (add_monitor_filter(drv->monitor_sock)) {
3165                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3166                            "interface; do filtering in user space");
3167                 /* This works, but will cost in performance. */
3168         }
3169
3170         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3171                 perror("monitor socket bind");
3172                 goto error;
3173         }
3174
3175         optlen = sizeof(optval);
3176         optval = 20;
3177         if (setsockopt
3178             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3179                 perror("Failed to set socket priority");
3180                 goto error;
3181         }
3182
3183         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3184                                      drv, NULL)) {
3185                 printf("Could not register monitor read socket\n");
3186                 goto error;
3187         }
3188
3189         return 0;
3190  error:
3191         nl80211_remove_monitor_interface(drv);
3192         return -1;
3193 }
3194
3195
3196 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3197
3198 static int wpa_driver_nl80211_hapd_send_eapol(
3199         void *priv, const u8 *addr, const u8 *data,
3200         size_t data_len, int encrypt, const u8 *own_addr)
3201 {
3202         struct wpa_driver_nl80211_data *drv = priv;
3203         struct ieee80211_hdr *hdr;
3204         size_t len;
3205         u8 *pos;
3206         int res;
3207 #if 0 /* FIX */
3208         int qos = sta->flags & WLAN_STA_WME;
3209 #else
3210         int qos = 0;
3211 #endif
3212
3213         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3214                 data_len;
3215         hdr = os_zalloc(len);
3216         if (hdr == NULL) {
3217                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3218                        (unsigned long) len);
3219                 return -1;
3220         }
3221
3222         hdr->frame_control =
3223                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3224         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3225         if (encrypt)
3226                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3227 #if 0 /* To be enabled if qos determination is added above */
3228         if (qos) {
3229                 hdr->frame_control |=
3230                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3231         }
3232 #endif
3233
3234         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3235         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3236         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3237         pos = (u8 *) (hdr + 1);
3238
3239 #if 0 /* To be enabled if qos determination is added above */
3240         if (qos) {
3241                 /* add an empty QoS header if needed */
3242                 pos[0] = 0;
3243                 pos[1] = 0;
3244                 pos += 2;
3245         }
3246 #endif
3247
3248         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3249         pos += sizeof(rfc1042_header);
3250         WPA_PUT_BE16(pos, ETH_P_PAE);
3251         pos += 2;
3252         memcpy(pos, data, data_len);
3253
3254         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3255         if (res < 0) {
3256                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3257                            "failed: %d (%s)",
3258                            (unsigned long) len, errno, strerror(errno));
3259         }
3260         free(hdr);
3261
3262         return res;
3263 }
3264
3265
3266 static u32 sta_flags_nl80211(int flags)
3267 {
3268         u32 f = 0;
3269
3270         if (flags & WLAN_STA_AUTHORIZED)
3271                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3272         if (flags & WLAN_STA_WMM)
3273                 f |= BIT(NL80211_STA_FLAG_WME);
3274         if (flags & WLAN_STA_SHORT_PREAMBLE)
3275                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3276         if (flags & WLAN_STA_MFP)
3277                 f |= BIT(NL80211_STA_FLAG_MFP);
3278
3279         return f;
3280 }
3281
3282
3283 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3284                                             int total_flags, int flags_or,
3285                                             int flags_and)
3286 {
3287         struct wpa_driver_nl80211_data *drv = priv;
3288         struct nl_msg *msg, *flags = NULL;
3289         struct nl80211_sta_flag_update upd;
3290
3291         msg = nlmsg_alloc();
3292         if (!msg)
3293                 return -ENOMEM;
3294
3295         flags = nlmsg_alloc();
3296         if (!flags) {
3297                 nlmsg_free(msg);
3298                 return -ENOMEM;
3299         }
3300
3301         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3302                     0, NL80211_CMD_SET_STATION, 0);
3303
3304         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3305                     if_nametoindex(drv->ifname));
3306         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3307
3308         /*
3309          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3310          * can be removed eventually.
3311          */
3312         if (total_flags & WLAN_STA_AUTHORIZED)
3313                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3314
3315         if (total_flags & WLAN_STA_WMM)
3316                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3317
3318         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3319                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3320
3321         if (total_flags & WLAN_STA_MFP)
3322                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3323
3324         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3325                 goto nla_put_failure;
3326
3327         os_memset(&upd, 0, sizeof(upd));
3328         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3329         upd.set = sta_flags_nl80211(flags_or);
3330         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3331
3332         nlmsg_free(flags);
3333
3334         return send_and_recv_msgs(drv, msg, NULL, NULL);
3335  nla_put_failure:
3336         nlmsg_free(flags);
3337         return -ENOBUFS;
3338 }
3339
3340 #endif /* CONFIG_AP || HOSTAPD */
3341
3342 #ifdef CONFIG_AP
3343
3344 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3345                                  struct wpa_driver_associate_params *params)
3346 {
3347         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3348             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3349                 nl80211_remove_monitor_interface(drv);
3350                 return -1;
3351         }
3352
3353         /* TODO: setup monitor interface (and add code somewhere to remove this
3354          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3355
3356         return 0;
3357 }
3358 #endif /* CONFIG_AP */
3359
3360
3361 #ifndef HOSTAPD
3362 static int wpa_driver_nl80211_connect(
3363         struct wpa_driver_nl80211_data *drv,
3364         struct wpa_driver_associate_params *params)
3365 {
3366         struct nl_msg *msg;
3367         enum nl80211_auth_type type;
3368         int ret = 0;
3369
3370         msg = nlmsg_alloc();
3371         if (!msg)
3372                 return -1;
3373
3374         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3375         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3376                     NL80211_CMD_CONNECT, 0);
3377
3378         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3379         if (params->bssid) {
3380                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3381                            MAC2STR(params->bssid));
3382                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3383         }
3384         if (params->freq) {
3385                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3386                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3387         }
3388         if (params->ssid) {
3389                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3390                                   params->ssid, params->ssid_len);
3391                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3392                         params->ssid);
3393                 if (params->ssid_len > sizeof(drv->ssid))
3394                         goto nla_put_failure;
3395                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3396                 drv->ssid_len = params->ssid_len;
3397         }
3398         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3399         if (params->wpa_ie)
3400                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3401                         params->wpa_ie);
3402
3403         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3404                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3405         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3406                 type = NL80211_AUTHTYPE_SHARED_KEY;
3407         else if (params->auth_alg & AUTH_ALG_LEAP)
3408                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3409         else if (params->auth_alg & AUTH_ALG_FT)
3410                 type = NL80211_AUTHTYPE_FT;
3411         else
3412                 goto nla_put_failure;
3413
3414         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3415         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3416
3417         if (params->wpa_ie && params->wpa_ie_len) {
3418                 enum nl80211_wpa_versions ver;
3419
3420                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3421                         ver = NL80211_WPA_VERSION_2;
3422                 else
3423                         ver = NL80211_WPA_VERSION_1;
3424
3425                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3426                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3427         }
3428
3429         if (params->pairwise_suite != CIPHER_NONE) {
3430                 int cipher = IW_AUTH_CIPHER_NONE;
3431
3432                 switch (params->pairwise_suite) {
3433                 case CIPHER_WEP40:
3434                         cipher = WLAN_CIPHER_SUITE_WEP40;
3435                         break;
3436                 case CIPHER_WEP104:
3437                         cipher = WLAN_CIPHER_SUITE_WEP104;
3438                         break;
3439                 case CIPHER_CCMP:
3440                         cipher = WLAN_CIPHER_SUITE_CCMP;
3441                         break;
3442                 case CIPHER_TKIP:
3443                 default:
3444                         cipher = WLAN_CIPHER_SUITE_TKIP;
3445                         break;
3446                 }
3447                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3448         }
3449
3450         if (params->group_suite != CIPHER_NONE) {
3451                 int cipher = IW_AUTH_CIPHER_NONE;
3452
3453                 switch (params->group_suite) {
3454                 case CIPHER_WEP40:
3455                         cipher = WLAN_CIPHER_SUITE_WEP40;
3456                         break;
3457                 case CIPHER_WEP104:
3458                         cipher = WLAN_CIPHER_SUITE_WEP104;
3459                         break;
3460                 case CIPHER_CCMP:
3461                         cipher = WLAN_CIPHER_SUITE_CCMP;
3462                         break;
3463                 case CIPHER_TKIP:
3464                 default:
3465                         cipher = WLAN_CIPHER_SUITE_TKIP;
3466                         break;
3467                 }
3468                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3469         }
3470
3471         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3472             params->key_mgmt_suite == KEY_MGMT_PSK) {
3473                 int mgmt = WLAN_AKM_SUITE_PSK;
3474
3475                 switch (params->key_mgmt_suite) {
3476                 case KEY_MGMT_802_1X:
3477                         mgmt = WLAN_AKM_SUITE_8021X;
3478                         break;
3479                 case KEY_MGMT_PSK:
3480                 default:
3481                         mgmt = WLAN_AKM_SUITE_PSK;
3482                         break;
3483                 }
3484                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3485         }
3486
3487         ret = nl80211_set_conn_keys(params, msg);
3488         if (ret)
3489                 goto nla_put_failure;
3490
3491         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3492         msg = NULL;
3493         if (ret) {
3494                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3495                            "(%s)", ret, strerror(-ret));
3496                 goto nla_put_failure;
3497         }
3498         ret = 0;
3499         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3500
3501 nla_put_failure:
3502         nlmsg_free(msg);
3503         return ret;
3504
3505 }
3506
3507
3508 static int wpa_driver_nl80211_associate(
3509         void *priv, struct wpa_driver_associate_params *params)
3510 {
3511         struct wpa_driver_nl80211_data *drv = priv;
3512         int ret = -1;
3513         struct nl_msg *msg;
3514
3515 #ifdef CONFIG_AP
3516         if (params->mode == 2)
3517                 return wpa_driver_nl80211_ap(drv, params);
3518 #endif /* CONFIG_AP */
3519
3520         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
3521                 return wpa_driver_nl80211_connect(drv, params);
3522
3523 #ifndef NO_WEXT
3524         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
3525                                           params->drop_unencrypted);
3526 #endif /* NO_WEXT */
3527
3528         drv->associated = 0;
3529
3530         msg = nlmsg_alloc();
3531         if (!msg)
3532                 return -1;
3533
3534         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3535                    drv->ifindex);
3536         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3537                     NL80211_CMD_ASSOCIATE, 0);
3538
3539         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3540         if (params->bssid) {
3541                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3542                            MAC2STR(params->bssid));
3543                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3544         }
3545         if (params->freq) {
3546                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3547                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3548         }
3549         if (params->ssid) {
3550                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3551                                   params->ssid, params->ssid_len);
3552                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3553                         params->ssid);
3554                 if (params->ssid_len > sizeof(drv->ssid))
3555                         goto nla_put_failure;
3556                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3557                 drv->ssid_len = params->ssid_len;
3558         }
3559         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3560         if (params->wpa_ie)
3561                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3562                         params->wpa_ie);
3563
3564 #ifdef CONFIG_IEEE80211W
3565         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3566                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3567 #endif /* CONFIG_IEEE80211W */
3568
3569         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3570
3571         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3572         msg = NULL;
3573         if (ret) {
3574                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3575                            "(%s)", ret, strerror(-ret));
3576                 goto nla_put_failure;
3577         }
3578         ret = 0;
3579         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3580                    "successfully");
3581
3582 nla_put_failure:
3583         nlmsg_free(msg);
3584         return ret;
3585 }
3586 #endif /* HOSTAPD */
3587
3588
3589 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3590                             int ifindex, int mode)
3591 {
3592         struct nl_msg *msg;
3593         int ret = -ENOBUFS;
3594
3595         msg = nlmsg_alloc();
3596         if (!msg)
3597                 return -ENOMEM;
3598
3599         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3600                     0, NL80211_CMD_SET_INTERFACE, 0);
3601         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3602         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3603
3604         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3605         if (!ret)
3606                 return 0;
3607 nla_put_failure:
3608         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3609                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3610         return ret;
3611 }
3612
3613
3614 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3615 {
3616         struct wpa_driver_nl80211_data *drv = priv;
3617         int ret = -1;
3618         int nlmode;
3619
3620         switch (mode) {
3621         case 0:
3622                 nlmode = NL80211_IFTYPE_STATION;
3623                 break;
3624         case 1:
3625                 nlmode = NL80211_IFTYPE_ADHOC;
3626                 break;
3627         case 2:
3628                 nlmode = NL80211_IFTYPE_AP;
3629                 break;
3630         default:
3631                 return -1;
3632         }
3633
3634         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3635                 drv->nlmode = nlmode;
3636                 ret = 0;
3637                 goto done;
3638         }
3639
3640         if (nlmode == drv->nlmode) {
3641                 ret = 0;
3642                 goto done; /* Already in the requested mode */
3643         }
3644
3645         /* mac80211 doesn't allow mode changes while the device is up, so
3646          * take the device down, try to set the mode again, and bring the
3647          * device back up.
3648          */
3649         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3650                 /* Try to set the mode again while the interface is down */
3651                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3652                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3653                         ret = -1;
3654         }
3655
3656         if (!ret)
3657                 drv->nlmode = nlmode;
3658
3659 done:
3660 #if defined(CONFIG_AP) || defined(HOSTAPD)
3661         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3662                 /* Setup additional AP mode functionality if needed */
3663                 if (drv->monitor_ifidx < 0 &&
3664                     nl80211_create_monitor_interface(drv))
3665                         return -1;
3666         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3667                 /* Remove additional AP mode functionality */
3668                 nl80211_remove_monitor_interface(drv);
3669         }
3670 #endif /* CONFIG_AP || HOSTAPD */
3671
3672         return ret;
3673 }
3674
3675
3676 #ifndef HOSTAPD
3677
3678 static int wpa_driver_nl80211_get_capa(void *priv,
3679                                        struct wpa_driver_capa *capa)
3680 {
3681         struct wpa_driver_nl80211_data *drv = priv;
3682         if (!drv->has_capability)
3683                 return -1;
3684         os_memcpy(capa, &drv->capa, sizeof(*capa));
3685         return 0;
3686 }
3687
3688
3689 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3690 {
3691         struct wpa_driver_nl80211_data *drv = priv;
3692
3693         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3694                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3695         drv->operstate = state;
3696         return wpa_driver_nl80211_send_oper_ifla(
3697                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3698 }
3699
3700
3701 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3702 {
3703         struct wpa_driver_nl80211_data *drv = priv;
3704         struct nl_msg *msg;
3705         struct nl80211_sta_flag_update upd;
3706
3707         msg = nlmsg_alloc();
3708         if (!msg)
3709                 return -ENOMEM;
3710
3711         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3712                     0, NL80211_CMD_SET_STATION, 0);
3713
3714         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3715                     if_nametoindex(drv->ifname));
3716         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3717
3718         os_memset(&upd, 0, sizeof(upd));
3719         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3720         if (authorized)
3721                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3722         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3723
3724         return send_and_recv_msgs(drv, msg, NULL, NULL);
3725  nla_put_failure:
3726         return -ENOBUFS;
3727 }
3728
3729 #endif /* HOSTAPD */
3730
3731
3732 #ifdef HOSTAPD
3733
3734 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3735                                  int ifindex)
3736 {
3737         struct i802_bss *bss = &drv->bss;
3738         while (bss) {
3739                 if (ifindex == bss->ifindex)
3740                         return bss;
3741                 bss = bss->next;
3742         }
3743         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3744         return NULL;
3745 }
3746
3747
3748 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3749 {
3750         int i;
3751         int *old;
3752
3753         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3754                    ifidx);
3755         for (i = 0; i < drv->num_if_indices; i++) {
3756                 if (drv->if_indices[i] == 0) {
3757                         drv->if_indices[i] = ifidx;
3758                         return;
3759                 }
3760         }
3761
3762         if (drv->if_indices != drv->default_if_indices)
3763                 old = drv->if_indices;
3764         else
3765                 old = NULL;
3766
3767         drv->if_indices = realloc(old,
3768                                   sizeof(int) * (drv->num_if_indices + 1));
3769         if (!drv->if_indices) {
3770                 if (!old)
3771                         drv->if_indices = drv->default_if_indices;
3772                 else
3773                         drv->if_indices = old;
3774                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3775                            "interfaces");
3776                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3777                 return;
3778         }
3779         drv->if_indices[drv->num_if_indices] = ifidx;
3780         drv->num_if_indices++;
3781 }
3782
3783
3784 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3785 {
3786         int i;
3787
3788         for (i = 0; i < drv->num_if_indices; i++) {
3789                 if (drv->if_indices[i] == ifidx) {
3790                         drv->if_indices[i] = 0;
3791                         break;
3792                 }
3793         }
3794 }
3795
3796
3797 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3798 {
3799         int i;
3800
3801         for (i = 0; i < drv->num_if_indices; i++)
3802                 if (drv->if_indices[i] == ifidx)
3803                         return 1;
3804
3805         return 0;
3806 }
3807
3808
3809 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3810                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3811                         size_t seq_len, const u8 *key, size_t key_len)
3812 {
3813         struct wpa_driver_nl80211_data *drv = priv;
3814         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3815                            set_tx, seq, seq_len, key, key_len);
3816 }
3817
3818
3819 static inline int min_int(int a, int b)
3820 {
3821         if (a < b)
3822                 return a;
3823         return b;
3824 }
3825
3826
3827 static int get_key_handler(struct nl_msg *msg, void *arg)
3828 {
3829         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3830         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3831
3832         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3833                   genlmsg_attrlen(gnlh, 0), NULL);
3834
3835         /*
3836          * TODO: validate the key index and mac address!
3837          * Otherwise, there's a race condition as soon as
3838          * the kernel starts sending key notifications.
3839          */
3840
3841         if (tb[NL80211_ATTR_KEY_SEQ])
3842                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3843                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3844         return NL_SKIP;
3845 }
3846
3847
3848 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3849                            int idx, u8 *seq)
3850 {
3851         struct wpa_driver_nl80211_data *drv = priv;
3852         struct nl_msg *msg;
3853
3854         msg = nlmsg_alloc();
3855         if (!msg)
3856                 return -ENOMEM;
3857
3858         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3859                     0, NL80211_CMD_GET_KEY, 0);
3860
3861         if (addr)
3862                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3863         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3864         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3865
3866         memset(seq, 0, 6);
3867
3868         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3869  nla_put_failure:
3870         return -ENOBUFS;
3871 }
3872
3873
3874 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3875                               int mode)
3876 {
3877         struct wpa_driver_nl80211_data *drv = priv;
3878         struct nl_msg *msg;
3879         u8 rates[NL80211_MAX_SUPP_RATES];
3880         u8 rates_len = 0;
3881         int i;
3882
3883         msg = nlmsg_alloc();
3884         if (!msg)
3885                 return -ENOMEM;
3886
3887         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3888                     NL80211_CMD_SET_BSS, 0);
3889
3890         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3891                 rates[rates_len++] = basic_rates[i] / 5;
3892
3893         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3894
3895         /* TODO: multi-BSS support */
3896         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3897
3898         return send_and_recv_msgs(drv, msg, NULL, NULL);
3899  nla_put_failure:
3900         return -ENOBUFS;
3901 }
3902
3903
3904 /* Set kernel driver on given frequency (MHz) */
3905 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3906 {
3907         struct wpa_driver_nl80211_data *drv = priv;
3908         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3909                                            freq->sec_channel_offset);
3910 }
3911
3912
3913 static int i802_set_rts(void *priv, int rts)
3914 {
3915         struct wpa_driver_nl80211_data *drv = priv;
3916         struct nl_msg *msg;
3917         int ret = -ENOBUFS;
3918         u32 val;
3919
3920         msg = nlmsg_alloc();
3921         if (!msg)
3922                 return -ENOMEM;
3923
3924         if (rts >= 2347)
3925                 val = (u32) -1;
3926         else
3927                 val = rts;
3928
3929         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3930                     0, NL80211_CMD_SET_WIPHY, 0);
3931         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3932         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3933
3934         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3935         if (!ret)
3936                 return 0;
3937 nla_put_failure:
3938         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3939                    "%d (%s)", rts, ret, strerror(-ret));
3940         return ret;
3941 }
3942
3943
3944 static int i802_set_frag(void *priv, int frag)
3945 {
3946         struct wpa_driver_nl80211_data *drv = priv;
3947         struct nl_msg *msg;
3948         int ret = -ENOBUFS;
3949         u32 val;
3950
3951         msg = nlmsg_alloc();
3952         if (!msg)
3953                 return -ENOMEM;
3954
3955         if (frag >= 2346)
3956                 val = (u32) -1;
3957         else
3958                 val = frag;
3959
3960         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3961                     0, NL80211_CMD_SET_WIPHY, 0);
3962         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3963         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3964
3965         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3966         if (!ret)
3967                 return 0;
3968 nla_put_failure:
3969         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3970                    "%d: %d (%s)", frag, ret, strerror(-ret));
3971         return ret;
3972 }
3973
3974
3975 static int i802_flush(void *priv)
3976 {
3977         struct wpa_driver_nl80211_data *drv = priv;
3978         struct nl_msg *msg;
3979
3980         msg = nlmsg_alloc();
3981         if (!msg)
3982                 return -1;
3983
3984         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3985                     0, NL80211_CMD_DEL_STATION, 0);
3986
3987         /*
3988          * XXX: FIX! this needs to flush all VLANs too
3989          */
3990         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3991                     if_nametoindex(drv->ifname));
3992
3993         return send_and_recv_msgs(drv, msg, NULL, NULL);
3994  nla_put_failure:
3995         return -ENOBUFS;
3996 }
3997
3998
3999 static int get_sta_handler(struct nl_msg *msg, void *arg)
4000 {
4001         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4002         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4003         struct hostap_sta_driver_data *data = arg;
4004         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4005         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4006                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4007                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4008                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4009                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4010                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4011         };
4012
4013         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4014                   genlmsg_attrlen(gnlh, 0), NULL);
4015
4016         /*
4017          * TODO: validate the interface and mac address!
4018          * Otherwise, there's a race condition as soon as
4019          * the kernel starts sending station notifications.
4020          */
4021
4022         if (!tb[NL80211_ATTR_STA_INFO]) {
4023                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4024                 return NL_SKIP;
4025         }
4026         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4027                              tb[NL80211_ATTR_STA_INFO],
4028                              stats_policy)) {
4029                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4030                 return NL_SKIP;
4031         }
4032
4033         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4034                 data->inactive_msec =
4035                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4036         if (stats[NL80211_STA_INFO_RX_BYTES])
4037                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4038         if (stats[NL80211_STA_INFO_TX_BYTES])
4039                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4040         if (stats[NL80211_STA_INFO_RX_PACKETS])
4041                 data->rx_packets =
4042                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4043         if (stats[NL80211_STA_INFO_TX_PACKETS])
4044                 data->tx_packets =
4045                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4046
4047         return NL_SKIP;
4048 }
4049
4050 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4051                               const u8 *addr)
4052 {
4053         struct wpa_driver_nl80211_data *drv = priv;
4054         struct nl_msg *msg;
4055
4056         os_memset(data, 0, sizeof(*data));
4057         msg = nlmsg_alloc();
4058         if (!msg)
4059                 return -ENOMEM;
4060
4061         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4062                     0, NL80211_CMD_GET_STATION, 0);
4063
4064         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4065         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4066
4067         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4068  nla_put_failure:
4069         return -ENOBUFS;
4070 }
4071
4072
4073 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4074                                     int cw_min, int cw_max, int burst_time)
4075 {
4076         struct wpa_driver_nl80211_data *drv = priv;
4077         struct nl_msg *msg;
4078         struct nlattr *txq, *params;
4079
4080         msg = nlmsg_alloc();
4081         if (!msg)
4082                 return -1;
4083
4084         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4085                     0, NL80211_CMD_SET_WIPHY, 0);
4086
4087         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4088
4089         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4090         if (!txq)
4091                 goto nla_put_failure;
4092
4093         /* We are only sending parameters for a single TXQ at a time */
4094         params = nla_nest_start(msg, 1);
4095         if (!params)
4096                 goto nla_put_failure;
4097
4098         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4099         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4100          * 32 usec, so need to convert the value here. */
4101         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4102         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4103         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4104         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4105
4106         nla_nest_end(msg, params);
4107
4108         nla_nest_end(msg, txq);
4109
4110         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4111                 return 0;
4112  nla_put_failure:
4113         return -1;
4114 }
4115
4116
4117 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
4118 {
4119         struct wpa_driver_nl80211_data *drv = priv;
4120         int ifidx;
4121         struct i802_bss *bss;
4122
4123         bss = os_zalloc(sizeof(*bss));
4124         if (bss == NULL)
4125                 return -1;
4126
4127         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
4128         if (ifidx < 0) {
4129                 os_free(bss);
4130                 return -1;
4131         }
4132         bss->ifindex = ifidx;
4133         if (hostapd_set_iface_flags(priv, ifname, 1)) {
4134                 nl80211_remove_iface(priv, ifidx);
4135                 os_free(bss);
4136                 return -1;
4137         }
4138         bss->next = drv->bss.next;
4139         drv->bss.next = bss;
4140         return 0;
4141 }
4142
4143
4144 static int i802_bss_remove(void *priv, const char *ifname)
4145 {
4146         struct wpa_driver_nl80211_data *drv = priv;
4147         struct i802_bss *bss, *prev;
4148         int ifindex = if_nametoindex(ifname);
4149         nl80211_remove_iface(priv, ifindex);
4150         prev = &drv->bss;
4151         bss = drv->bss.next;
4152         while (bss) {
4153                 if (ifindex == bss->ifindex) {
4154                         prev->next = bss->next;
4155                         os_free(bss);
4156                         break;
4157                 }
4158                 prev = bss;
4159                 bss = bss->next;
4160         }
4161         return 0;
4162 }
4163
4164
4165 static int i802_set_beacon(const char *iface, void *priv,
4166                            const u8 *head, size_t head_len,
4167                            const u8 *tail, size_t tail_len, int dtim_period)
4168 {
4169         return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
4170                                                    head, head_len,
4171                                                    tail, tail_len,
4172                                                    dtim_period);
4173 }
4174
4175
4176 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4177 {
4178         struct wpa_driver_nl80211_data *drv = priv;
4179         struct nl_msg *msg;
4180
4181         msg = nlmsg_alloc();
4182         if (!msg)
4183                 return -ENOMEM;
4184
4185         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4186                     NL80211_CMD_SET_BSS, 0);
4187
4188         if (cts >= 0)
4189                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4190         if (preamble >= 0)
4191                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4192         if (slot >= 0)
4193                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4194
4195         /* TODO: multi-BSS support */
4196         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4197
4198         return send_and_recv_msgs(drv, msg, NULL, NULL);
4199  nla_put_failure:
4200         return -ENOBUFS;
4201 }
4202
4203
4204 static int i802_set_cts_protect(void *priv, int value)
4205 {
4206         return i802_set_bss(priv, value, -1, -1);
4207 }
4208
4209
4210 static int i802_set_preamble(void *priv, int value)
4211 {
4212         return i802_set_bss(priv, -1, value, -1);
4213 }
4214
4215
4216 static int i802_set_short_slot_time(void *priv, int value)
4217 {
4218         return i802_set_bss(priv, -1, -1, value);
4219 }
4220
4221
4222 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
4223 {
4224         switch (type) {
4225         case HOSTAPD_IF_VLAN:
4226                 return NL80211_IFTYPE_AP_VLAN;
4227         }
4228         return -1;
4229 }
4230
4231
4232 static int i802_if_add(const char *iface, void *priv,
4233                        enum hostapd_driver_if_type type, char *ifname,
4234                        const u8 *addr)
4235 {
4236         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
4237                 return -1;
4238         return 0;
4239 }
4240
4241
4242 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
4243                           char *ifname, const u8 *addr)
4244 {
4245         /* unused at the moment */
4246         return -1;
4247 }
4248
4249
4250 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
4251                           const char *ifname, const u8 *addr)
4252 {
4253         nl80211_remove_iface(priv, if_nametoindex(ifname));
4254         return 0;
4255 }
4256
4257
4258 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4259                              const char *ifname, int vlan_id)
4260 {
4261         struct wpa_driver_nl80211_data *drv = priv;
4262         struct nl_msg *msg;
4263
4264         msg = nlmsg_alloc();
4265         if (!msg)
4266                 return -ENOMEM;
4267
4268         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4269                     0, NL80211_CMD_SET_STATION, 0);
4270
4271         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4272                     if_nametoindex(drv->ifname));
4273         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4274         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4275                     if_nametoindex(ifname));
4276
4277         return send_and_recv_msgs(drv, msg, NULL, NULL);
4278  nla_put_failure:
4279         return -ENOBUFS;
4280 }
4281
4282
4283 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4284 {
4285         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4286         struct sockaddr_ll lladdr;
4287         unsigned char buf[3000];
4288         int len;
4289         socklen_t fromlen = sizeof(lladdr);
4290
4291         len = recvfrom(sock, buf, sizeof(buf), 0,
4292                        (struct sockaddr *)&lladdr, &fromlen);
4293         if (len < 0) {
4294                 perror("recv");
4295                 return;
4296         }
4297
4298         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4299                 void *ctx;
4300                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4301                 if (!ctx)
4302                         return;
4303                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4304         }
4305 }
4306
4307
4308 static int i802_get_inact_sec(void *priv, const u8 *addr)
4309 {
4310         struct hostap_sta_driver_data data;
4311         int ret;
4312
4313         data.inactive_msec = (unsigned long) -1;
4314         ret = i802_read_sta_data(priv, &data, addr);
4315         if (ret || data.inactive_msec == (unsigned long) -1)
4316                 return -1;
4317         return data.inactive_msec / 1000;
4318 }
4319
4320
4321 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4322 {
4323 #if 0
4324         /* TODO */
4325 #endif
4326         return 0;
4327 }
4328
4329
4330 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4331                            int reason)
4332 {
4333         struct wpa_driver_nl80211_data *drv = priv;
4334         struct ieee80211_mgmt mgmt;
4335
4336         memset(&mgmt, 0, sizeof(mgmt));
4337         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4338                                           WLAN_FC_STYPE_DEAUTH);
4339         memcpy(mgmt.da, addr, ETH_ALEN);
4340         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4341         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4342         mgmt.u.deauth.reason_code = host_to_le16(reason);
4343         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4344                                             IEEE80211_HDRLEN +
4345                                             sizeof(mgmt.u.deauth));
4346 }
4347
4348
4349 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4350                              int reason)
4351 {
4352         struct wpa_driver_nl80211_data *drv = priv;
4353         struct ieee80211_mgmt mgmt;
4354
4355         memset(&mgmt, 0, sizeof(mgmt));
4356         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4357                                           WLAN_FC_STYPE_DISASSOC);
4358         memcpy(mgmt.da, addr, ETH_ALEN);
4359         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4360         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4361         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4362         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4363                                             IEEE80211_HDRLEN +
4364                                             sizeof(mgmt.u.disassoc));
4365 }
4366
4367
4368 static void *i802_init(struct hostapd_data *hapd,
4369                        struct wpa_init_params *params)
4370 {
4371         struct wpa_driver_nl80211_data *drv;
4372         size_t i;
4373
4374         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4375         if (drv == NULL)
4376                 return NULL;
4377
4378         drv->bss.ifindex = drv->ifindex;
4379
4380         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4381         drv->if_indices = drv->default_if_indices;
4382         for (i = 0; i < params->num_bridge; i++) {
4383                 if (params->bridge[i])
4384                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4385         }
4386
4387         /* start listening for EAPOL on the default AP interface */
4388         add_ifidx(drv, drv->ifindex);
4389
4390         if (params->bssid) {
4391                 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4392                         goto failed;
4393
4394                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4395                         goto failed;
4396         }
4397
4398         if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
4399                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4400                            "into AP mode", drv->ifname);
4401                 goto failed;
4402         }
4403
4404         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4405                 goto failed;
4406
4407         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4408         if (drv->eapol_sock < 0) {
4409                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4410                 goto failed;
4411         }
4412
4413         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4414         {
4415                 printf("Could not register read socket for eapol\n");
4416                 goto failed;
4417         }
4418
4419         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4420                 goto failed;
4421
4422         return drv;
4423
4424 failed:
4425         nl80211_remove_monitor_interface(drv);
4426         if (drv->ioctl_sock >= 0)
4427                 close(drv->ioctl_sock);
4428
4429         genl_family_put(drv->nl80211);
4430         nl_cache_free(drv->nl_cache);
4431         nl_handle_destroy(drv->nl_handle);
4432         nl_cb_put(drv->nl_cb);
4433
4434         os_free(drv);
4435         return NULL;
4436 }
4437
4438
4439 static void i802_deinit(void *priv)
4440 {
4441         wpa_driver_nl80211_deinit(priv);
4442 }
4443
4444 #endif /* HOSTAPD */
4445
4446
4447 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4448         .name = "nl80211",
4449         .desc = "Linux nl80211/cfg80211",
4450 #ifndef HOSTAPD
4451         .get_bssid = wpa_driver_nl80211_get_bssid,
4452         .get_ssid = wpa_driver_nl80211_get_ssid,
4453         .set_key = wpa_driver_nl80211_set_key,
4454 #endif /* HOSTAPD */
4455         .scan2 = wpa_driver_nl80211_scan,
4456         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4457 #ifndef HOSTAPD
4458         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4459         .disassociate = wpa_driver_nl80211_disassociate,
4460         .authenticate = wpa_driver_nl80211_authenticate,
4461         .associate = wpa_driver_nl80211_associate,
4462         .init = wpa_driver_nl80211_init,
4463         .deinit = wpa_driver_nl80211_deinit,
4464         .get_capa = wpa_driver_nl80211_get_capa,
4465         .set_operstate = wpa_driver_nl80211_set_operstate,
4466         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4467 #endif /* HOSTAPD */
4468         .set_country = wpa_driver_nl80211_set_country,
4469         .set_mode = wpa_driver_nl80211_set_mode,
4470 #ifdef CONFIG_AP
4471         .set_beacon = wpa_driver_nl80211_set_beacon,
4472 #endif /* CONFIG_AP */
4473 #if defined(CONFIG_AP) || defined(HOSTAPD)
4474         .send_mlme = wpa_driver_nl80211_send_mlme,
4475         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4476         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4477         .sta_add = wpa_driver_nl80211_sta_add,
4478         .sta_remove = wpa_driver_nl80211_sta_remove,
4479         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4480         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4481 #endif /* CONFIG_AP || HOSTAPD */
4482 #ifdef HOSTAPD
4483         .hapd_init = i802_init,
4484         .hapd_deinit = i802_deinit,
4485         .hapd_set_key = i802_set_key,
4486         .get_seqnum = i802_get_seqnum,
4487         .flush = i802_flush,
4488         .read_sta_data = i802_read_sta_data,
4489         .sta_deauth = i802_sta_deauth,
4490         .sta_disassoc = i802_sta_disassoc,
4491         .get_inact_sec = i802_get_inact_sec,
4492         .sta_clear_stats = i802_sta_clear_stats,
4493         .set_freq = i802_set_freq,
4494         .set_rts = i802_set_rts,
4495         .set_frag = i802_set_frag,
4496         .set_rate_sets = i802_set_rate_sets,
4497         .hapd_set_beacon = i802_set_beacon,
4498         .set_cts_protect = i802_set_cts_protect,
4499         .set_preamble = i802_set_preamble,
4500         .set_short_slot_time = i802_set_short_slot_time,
4501         .set_tx_queue_params = i802_set_tx_queue_params,
4502         .bss_add = i802_bss_add,
4503         .bss_remove = i802_bss_remove,
4504         .if_add = i802_if_add,
4505         .if_update = i802_if_update,
4506         .if_remove = i802_if_remove,
4507         .set_sta_vlan = i802_set_sta_vlan,
4508 #endif /* HOSTAPD */
4509 };