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