www.project-moonshot.org Git - mech_eap.orig/blob - src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if_arp.h>
  22 #include <net/if.h>
  23 #include <netlink/genl/genl.h>
  24 #include <netlink/genl/family.h>
  25 #include <netlink/genl/ctrl.h>
  26 #include "nl80211_copy.h"
  27
  28 #include "common.h"
  29 #include "driver.h"
  30 #include "eloop.h"
  31 #include "common/ieee802_11_defs.h"
  32
  33 #if defined(CONFIG_AP) || defined(HOSTAPD)
  34 #include <netpacket/packet.h>
  35 #include <linux/filter.h>
  36 #include "radiotap.h"
  37 #include "radiotap_iter.h"
  38
  39 #include "../../hostapd/sta_flags.h"
  40 #endif /* CONFIG_AP || HOSTAPD */
  41
  42 #ifdef CONFIG_LIBNL20
  43 /* libnl 2.0 compatibility code */
  44 #define nl_handle nl_sock
  45 #define nl_handle_alloc_cb nl_socket_alloc_cb
  46 #define nl_handle_destroy nl_socket_free
  47 #endif /* CONFIG_LIBNL20 */
  48
  49
  50 #ifndef IFF_LOWER_UP
  51 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  52 #endif
  53 #ifndef IFF_DORMANT
  54 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  55 #endif
  56
  57 #ifndef IF_OPER_DORMANT
  58 #define IF_OPER_DORMANT 5
  59 #endif
  60 #ifndef IF_OPER_UP
  61 #define IF_OPER_UP 6
  62 #endif
  63
  64 struct i802_bss {
  65         struct i802_bss *next;
  66         int ifindex;
  67         unsigned int beacon_set:1;
  68 };
  69
  70 struct wpa_driver_nl80211_data {
  71         void *ctx;
  72         int link_event_sock;
  73         int ioctl_sock; /* socket for ioctl() use */
  74         char ifname[IFNAMSIZ + 1];
  75         int ifindex;
  76         int if_removed;
  77         struct wpa_driver_capa capa;
  78         int has_capability;
  79
  80         int operstate;
  81
  82         int scan_complete_events;
  83
  84         struct nl_handle *nl_handle;
  85         struct nl_handle *nl_handle_event;
  86         struct nl_cache *nl_cache;
  87         struct nl_cache *nl_cache_event;
  88         struct nl_cb *nl_cb;
  89         struct genl_family *nl80211;
  90
  91         u8 auth_bssid[ETH_ALEN];
  92         u8 bssid[ETH_ALEN];
  93         int associated;
  94         u8 ssid[32];
  95         size_t ssid_len;
  96         int nlmode;
  97         int ap_scan_as_station;
  98
  99         int monitor_sock;
 100         int monitor_ifidx;
 101
 102         unsigned int beacon_set:1;
 103
 104 #ifdef HOSTAPD
 105         int eapol_sock; /* socket for EAPOL frames */
 106
 107         int default_if_indices[16];
 108         int *if_indices;
 109         int num_if_indices;
 110
 111         struct i802_bss bss;
 112
 113         int last_freq;
 114         int last_freq_ht;
 115 #endif /* HOSTAPD */
 116 };
 117
 118
 119 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 120                                             void *timeout_ctx);
 121 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 122 static int
 123 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 124 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 125                                    const u8 *addr, int cmd, u16 reason_code);
 126
 127 #if defined(CONFIG_AP) || defined(HOSTAPD)
 128 static void nl80211_remove_monitor_interface(
 129         struct wpa_driver_nl80211_data *drv);
 130 #endif /* CONFIG_AP || HOSTAPD */
 131
 132 #ifdef CONFIG_AP
 133 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 134                                  int ifidx);
 135 #endif /* CONFIG_AP */
 136
 137 #ifdef HOSTAPD
 138 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 139 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 140 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 141                                  int ifindex);
 142 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 143                                  int ifidx);
 144 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 145 #endif /* HOSTAPD */
 146
 147
 148 /* nl80211 code */
 149 static int ack_handler(struct nl_msg *msg, void *arg)
 150 {
 151         int *err = arg;
 152         *err = 0;
 153         return NL_STOP;
 154 }
 155
 156 static int finish_handler(struct nl_msg *msg, void *arg)
 157 {
 158         int *ret = arg;
 159         *ret = 0;
 160         return NL_SKIP;
 161 }
 162
 163 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 164                          void *arg)
 165 {
 166         int *ret = arg;
 167         *ret = err->error;
 168         return NL_SKIP;
 169 }
 170
 171
 172 static int no_seq_check(struct nl_msg *msg, void *arg)
 173 {
 174         return NL_OK;
 175 }
 176
 177
 178 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 179                               struct nl_msg *msg,
 180                               int (*valid_handler)(struct nl_msg *, void *),
 181                               void *valid_data)
 182 {
 183         struct nl_cb *cb;
 184         int err = -ENOMEM;
 185
 186         cb = nl_cb_clone(drv->nl_cb);
 187         if (!cb)
 188                 goto out;
 189
 190         err = nl_send_auto_complete(drv->nl_handle, msg);
 191         if (err < 0)
 192                 goto out;
 193
 194         err = 1;
 195
 196         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 197         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 198         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 199
 200         if (valid_handler)
 201                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 202                           valid_handler, valid_data);
 203
 204         while (err > 0)
 205                 nl_recvmsgs(drv->nl_handle, cb);
 206  out:
 207         nl_cb_put(cb);
 208         nlmsg_free(msg);
 209         return err;
 210 }
 211
 212
 213 struct family_data {
 214         const char *group;
 215         int id;
 216 };
 217
 218
 219 static int family_handler(struct nl_msg *msg, void *arg)
 220 {
 221         struct family_data *res = arg;
 222         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 223         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 224         struct nlattr *mcgrp;
 225         int i;
 226
 227         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 228                   genlmsg_attrlen(gnlh, 0), NULL);
 229         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 230                 return NL_SKIP;
 231
 232         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 233                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 234                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 235                           nla_len(mcgrp), NULL);
 236                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 237                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 238                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 239                                res->group,
 240                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 241                         continue;
 242                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 243                 break;
 244         };
 245
 246         return NL_SKIP;
 247 }
 248
 249
 250 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 251                                const char *family, const char *group)
 252 {
 253         struct nl_msg *msg;
 254         int ret = -1;
 255         struct family_data res = { group, -ENOENT };
 256
 257         msg = nlmsg_alloc();
 258         if (!msg)
 259                 return -ENOMEM;
 260         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 261                     0, 0, CTRL_CMD_GETFAMILY, 0);
 262         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 263
 264         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 265         msg = NULL;
 266         if (ret == 0)
 267                 ret = res.id;
 268
 269 nla_put_failure:
 270         nlmsg_free(msg);
 271         return ret;
 272 }
 273
 274
 275 #ifdef HOSTAPD
 276 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 277                         const char *ifname, u8 *addr)
 278 {
 279         struct ifreq ifr;
 280
 281         os_memset(&ifr, 0, sizeof(ifr));
 282         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 283         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 284                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 285                            ifname, errno, strerror(errno));
 286                 return -1;
 287         }
 288
 289         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 290                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 291                            ifname, ifr.ifr_hwaddr.sa_family);
 292                 return -1;
 293         }
 294         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 295
 296         return 0;
 297 }
 298
 299
 300 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 301                         const char *ifname, const u8 *addr)
 302 {
 303         struct ifreq ifr;
 304
 305         os_memset(&ifr, 0, sizeof(ifr));
 306         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 307         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 308         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 309
 310         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 311                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 312                            ifname, errno, strerror(errno));
 313                 return -1;
 314         }
 315
 316         return 0;
 317 }
 318 #endif /* HOSTAPD */
 319
 320
 321 static int wpa_driver_nl80211_send_oper_ifla(
 322         struct wpa_driver_nl80211_data *drv,
 323         int linkmode, int operstate)
 324 {
 325         struct {
 326                 struct nlmsghdr hdr;
 327                 struct ifinfomsg ifinfo;
 328                 char opts[16];
 329         } req;
 330         struct rtattr *rta;
 331         static int nl_seq;
 332         ssize_t ret;
 333
 334         os_memset(&req, 0, sizeof(req));
 335
 336         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 337         req.hdr.nlmsg_type = RTM_SETLINK;
 338         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 339         req.hdr.nlmsg_seq = ++nl_seq;
 340         req.hdr.nlmsg_pid = 0;
 341
 342         req.ifinfo.ifi_family = AF_UNSPEC;
 343         req.ifinfo.ifi_type = 0;
 344         req.ifinfo.ifi_index = drv->ifindex;
 345         req.ifinfo.ifi_flags = 0;
 346         req.ifinfo.ifi_change = 0;
 347
 348         if (linkmode != -1) {
 349                 rta = aliasing_hide_typecast(
 350                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
 351                         struct rtattr);
 352                 rta->rta_type = IFLA_LINKMODE;
 353                 rta->rta_len = RTA_LENGTH(sizeof(char));
 354                 *((char *) RTA_DATA(rta)) = linkmode;
 355                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 356                         RTA_LENGTH(sizeof(char));
 357         }
 358         if (operstate != -1) {
 359                 rta = aliasing_hide_typecast(
 360                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
 361                         struct rtattr);
 362                 rta->rta_type = IFLA_OPERSTATE;
 363                 rta->rta_len = RTA_LENGTH(sizeof(char));
 364                 *((char *) RTA_DATA(rta)) = operstate;
 365                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 366                         RTA_LENGTH(sizeof(char));
 367         }
 368
 369         wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
 370                    linkmode, operstate);
 371
 372         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 373         if (ret < 0) {
 374                 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
 375                            " %s (assume operstate is not supported)",
 376                            strerror(errno));
 377         }
 378
 379         return ret < 0 ? -1 : 0;
 380 }
 381
 382
 383 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 384 {
 385         struct wpa_driver_nl80211_data *drv = priv;
 386         if (!drv->associated)
 387                 return -1;
 388         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 389         return 0;
 390 }
 391
 392
 393 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 394 {
 395         struct wpa_driver_nl80211_data *drv = priv;
 396         if (!drv->associated)
 397                 return -1;
 398         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 399         return drv->ssid_len;
 400 }
 401
 402
 403 #ifndef HOSTAPD
 404
 405 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 406                                           void *ctx, char *buf, size_t len,
 407                                           int del)
 408 {
 409         union wpa_event_data event;
 410
 411         os_memset(&event, 0, sizeof(event));
 412         if (len > sizeof(event.interface_status.ifname))
 413                 len = sizeof(event.interface_status.ifname) - 1;
 414         os_memcpy(event.interface_status.ifname, buf, len);
 415         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 416                 EVENT_INTERFACE_ADDED;
 417
 418         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 419                    del ? "DEL" : "NEW",
 420                    event.interface_status.ifname,
 421                    del ? "removed" : "added");
 422
 423         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 424                 if (del)
 425                         drv->if_removed = 1;
 426                 else
 427                         drv->if_removed = 0;
 428         }
 429
 430         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 431 }
 432
 433
 434 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 435                                          struct nlmsghdr *h)
 436 {
 437         struct ifinfomsg *ifi;
 438         int attrlen, _nlmsg_len, rta_len;
 439         struct rtattr *attr;
 440
 441         ifi = NLMSG_DATA(h);
 442
 443         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 444
 445         attrlen = h->nlmsg_len - _nlmsg_len;
 446         if (attrlen < 0)
 447                 return 0;
 448
 449         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 450
 451         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 452         while (RTA_OK(attr, attrlen)) {
 453                 if (attr->rta_type == IFLA_IFNAME) {
 454                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 455                             == 0)
 456                                 return 1;
 457                         else
 458                                 break;
 459                 }
 460                 attr = RTA_NEXT(attr, attrlen);
 461         }
 462
 463         return 0;
 464 }
 465
 466
 467 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 468                                           int ifindex, struct nlmsghdr *h)
 469 {
 470         if (drv->ifindex == ifindex)
 471                 return 1;
 472
 473         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 474                 drv->ifindex = if_nametoindex(drv->ifname);
 475                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 476                            "interface");
 477                 wpa_driver_nl80211_finish_drv_init(drv);
 478                 return 1;
 479         }
 480
 481         return 0;
 482 }
 483
 484
 485 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 486                                               void *ctx, struct nlmsghdr *h,
 487                                               size_t len)
 488 {
 489         struct ifinfomsg *ifi;
 490         int attrlen, _nlmsg_len, rta_len;
 491         struct rtattr * attr;
 492
 493         if (len < sizeof(*ifi))
 494                 return;
 495
 496         ifi = NLMSG_DATA(h);
 497
 498         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 499                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 500                            ifi->ifi_index);
 501                 return;
 502         }
 503
 504         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 505                    "(%s%s%s%s)",
 506                    drv->operstate, ifi->ifi_flags,
 507                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 508                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 509                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 510                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 511         /*
 512          * Some drivers send the association event before the operup event--in
 513          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 514          * fails. This will hit us when wpa_supplicant does not need to do
 515          * IEEE 802.1X authentication
 516          */
 517         if (drv->operstate == 1 &&
 518             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 519             !(ifi->ifi_flags & IFF_RUNNING))
 520                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 521
 522         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 523
 524         attrlen = h->nlmsg_len - _nlmsg_len;
 525         if (attrlen < 0)
 526                 return;
 527
 528         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 529
 530         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 531         while (RTA_OK(attr, attrlen)) {
 532                 if (attr->rta_type == IFLA_IFNAME) {
 533                         wpa_driver_nl80211_event_link(
 534                                 drv, ctx,
 535                                 ((char *) attr) + rta_len,
 536                                 attr->rta_len - rta_len, 0);
 537                 }
 538                 attr = RTA_NEXT(attr, attrlen);
 539         }
 540 }
 541
 542
 543 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 544                                               void *ctx, struct nlmsghdr *h,
 545                                               size_t len)
 546 {
 547         struct ifinfomsg *ifi;
 548         int attrlen, _nlmsg_len, rta_len;
 549         struct rtattr * attr;
 550
 551         if (len < sizeof(*ifi))
 552                 return;
 553
 554         ifi = NLMSG_DATA(h);
 555
 556         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 557
 558         attrlen = h->nlmsg_len - _nlmsg_len;
 559         if (attrlen < 0)
 560                 return;
 561
 562         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 563
 564         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 565         while (RTA_OK(attr, attrlen)) {
 566                 if (attr->rta_type == IFLA_IFNAME) {
 567                         wpa_driver_nl80211_event_link(
 568                                 drv, ctx,
 569                                 ((char *) attr) + rta_len,
 570                                 attr->rta_len - rta_len, 1);
 571                 }
 572                 attr = RTA_NEXT(attr, attrlen);
 573         }
 574 }
 575
 576
 577 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 578                                                   void *sock_ctx)
 579 {
 580         char buf[8192];
 581         int left;
 582         struct sockaddr_nl from;
 583         socklen_t fromlen;
 584         struct nlmsghdr *h;
 585         int max_events = 10;
 586
 587 try_again:
 588         fromlen = sizeof(from);
 589         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 590                         (struct sockaddr *) &from, &fromlen);
 591         if (left < 0) {
 592                 if (errno != EINTR && errno != EAGAIN)
 593                         perror("recvfrom(netlink)");
 594                 return;
 595         }
 596
 597         h = (struct nlmsghdr *) buf;
 598         while (left >= (int) sizeof(*h)) {
 599                 int len, plen;
 600
 601                 len = h->nlmsg_len;
 602                 plen = len - sizeof(*h);
 603                 if (len > left || plen < 0) {
 604                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 605                                    "len=%d left=%d plen=%d",
 606                                    len, left, plen);
 607                         break;
 608                 }
 609
 610                 switch (h->nlmsg_type) {
 611                 case RTM_NEWLINK:
 612                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 613                                                           h, plen);
 614                         break;
 615                 case RTM_DELLINK:
 616                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 617                                                           h, plen);
 618                         break;
 619                 }
 620
 621                 len = NLMSG_ALIGN(len);
 622                 left -= len;
 623                 h = (struct nlmsghdr *) ((char *) h + len);
 624         }
 625
 626         if (left > 0) {
 627                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 628                            "message", left);
 629         }
 630
 631         if (--max_events > 0) {
 632                 /*
 633                  * Try to receive all events in one eloop call in order to
 634                  * limit race condition on cases where AssocInfo event, Assoc
 635                  * event, and EAPOL frames are received more or less at the
 636                  * same time. We want to process the event messages first
 637                  * before starting EAPOL processing.
 638                  */
 639                 goto try_again;
 640         }
 641 }
 642
 643 #endif /* HOSTAPD */
 644
 645
 646 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 647                             const u8 *frame, size_t len)
 648 {
 649         const struct ieee80211_mgmt *mgmt;
 650         union wpa_event_data event;
 651
 652         mgmt = (const struct ieee80211_mgmt *) frame;
 653         if (len < 24 + sizeof(mgmt->u.auth)) {
 654                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 655                            "frame");
 656                 return;
 657         }
 658
 659         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 660         os_memset(&event, 0, sizeof(event));
 661         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 662         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 663         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 664         if (len > 24 + sizeof(mgmt->u.auth)) {
 665                 event.auth.ies = mgmt->u.auth.variable;
 666                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 667         }
 668
 669         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 670 }
 671
 672
 673 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 674                             const u8 *frame, size_t len)
 675 {
 676         const struct ieee80211_mgmt *mgmt;
 677         union wpa_event_data event;
 678         u16 status;
 679
 680         mgmt = (const struct ieee80211_mgmt *) frame;
 681         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 682                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 683                            "frame");
 684                 return;
 685         }
 686
 687         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 688         if (status != WLAN_STATUS_SUCCESS) {
 689                 os_memset(&event, 0, sizeof(event));
 690                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 691                         event.assoc_reject.resp_ies =
 692                                 (u8 *) mgmt->u.assoc_resp.variable;
 693                         event.assoc_reject.resp_ies_len =
 694                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 695                 }
 696                 event.assoc_reject.status_code = status;
 697
 698                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 699                 return;
 700         }
 701
 702         drv->associated = 1;
 703         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 704
 705         os_memset(&event, 0, sizeof(event));
 706         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 707                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 708                 event.assoc_info.resp_ies_len =
 709                         len - 24 - sizeof(mgmt->u.assoc_resp);
 710         }
 711
 712         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 713 }
 714
 715
 716 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 717                                enum nl80211_commands cmd, struct nlattr *status,
 718                                struct nlattr *addr, struct nlattr *req_ie,
 719                                struct nlattr *resp_ie)
 720 {
 721         union wpa_event_data event;
 722
 723         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 724                 /*
 725                  * Avoid reporting two association events that would confuse
 726                  * the core code.
 727                  */
 728                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 729                            "when using userspace SME", cmd);
 730                 return;
 731         }
 732
 733         os_memset(&event, 0, sizeof(event));
 734         if (cmd == NL80211_CMD_CONNECT &&
 735             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 736                 if (resp_ie) {
 737                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 738                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 739                 }
 740                 event.assoc_reject.status_code = nla_get_u16(status);
 741                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 742                 return;
 743         }
 744
 745         drv->associated = 1;
 746         if (addr)
 747                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 748
 749         if (req_ie) {
 750                 event.assoc_info.req_ies = nla_data(req_ie);
 751                 event.assoc_info.req_ies_len = nla_len(req_ie);
 752         }
 753         if (resp_ie) {
 754                 event.assoc_info.resp_ies = nla_data(resp_ie);
 755                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 756         }
 757
 758         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 759 }
 760
 761
 762 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 763                                enum nl80211_commands cmd, struct nlattr *addr)
 764 {
 765         union wpa_event_data event;
 766         enum wpa_event_type ev;
 767
 768         if (nla_len(addr) != ETH_ALEN)
 769                 return;
 770
 771         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 772                    cmd, MAC2STR((u8 *) nla_data(addr)));
 773
 774         if (cmd == NL80211_CMD_AUTHENTICATE)
 775                 ev = EVENT_AUTH_TIMED_OUT;
 776         else if (cmd == NL80211_CMD_ASSOCIATE)
 777                 ev = EVENT_ASSOC_TIMED_OUT;
 778         else
 779                 return;
 780
 781         os_memset(&event, 0, sizeof(event));
 782         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 783         wpa_supplicant_event(drv->ctx, ev, &event);
 784 }
 785
 786
 787 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 788                        enum nl80211_commands cmd, struct nlattr *frame,
 789                        struct nlattr *addr, struct nlattr *timed_out)
 790 {
 791         if (timed_out && addr) {
 792                 mlme_timeout_event(drv, cmd, addr);
 793                 return;
 794         }
 795
 796         if (frame == NULL) {
 797                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 798                            "data", cmd);
 799                 return;
 800         }
 801
 802         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 803         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 804                     nla_data(frame), nla_len(frame));
 805
 806         switch (cmd) {
 807         case NL80211_CMD_AUTHENTICATE:
 808                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 809                 break;
 810         case NL80211_CMD_ASSOCIATE:
 811                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 812                 break;
 813         case NL80211_CMD_DEAUTHENTICATE:
 814                 drv->associated = 0;
 815                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 816                 break;
 817         case NL80211_CMD_DISASSOCIATE:
 818                 drv->associated = 0;
 819                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 820                 break;
 821         default:
 822                 break;
 823         }
 824 }
 825
 826
 827 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 828                                            struct nlattr *tb[])
 829 {
 830         union wpa_event_data data;
 831
 832         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 833         os_memset(&data, 0, sizeof(data));
 834         if (tb[NL80211_ATTR_MAC]) {
 835                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 836                             nla_data(tb[NL80211_ATTR_MAC]),
 837                             nla_len(tb[NL80211_ATTR_MAC]));
 838                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 839         }
 840         if (tb[NL80211_ATTR_KEY_SEQ]) {
 841                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 842                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 843                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 844         }
 845         if (tb[NL80211_ATTR_KEY_TYPE]) {
 846                 enum nl80211_key_type key_type =
 847                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 848                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 849                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 850                         data.michael_mic_failure.unicast = 1;
 851         } else
 852                 data.michael_mic_failure.unicast = 1;
 853
 854         if (tb[NL80211_ATTR_KEY_IDX]) {
 855                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 856                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 857         }
 858
 859         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 860 }
 861
 862
 863 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 864                                  struct nlattr *tb[])
 865 {
 866         if (tb[NL80211_ATTR_MAC] == NULL) {
 867                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 868                            "event");
 869                 return;
 870         }
 871         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 872         drv->associated = 1;
 873         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 874                    MAC2STR(drv->bssid));
 875
 876         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 877 }
 878
 879
 880 static int process_event(struct nl_msg *msg, void *arg)
 881 {
 882         struct wpa_driver_nl80211_data *drv = arg;
 883         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 884         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 885
 886         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 887                   genlmsg_attrlen(gnlh, 0), NULL);
 888
 889         if (tb[NL80211_ATTR_IFINDEX]) {
 890                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 891                 if (ifindex != drv->ifindex) {
 892                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 893                                    " for foreign interface (ifindex %d)",
 894                                    gnlh->cmd, ifindex);
 895                         return NL_SKIP;
 896                 }
 897         }
 898
 899         if (drv->ap_scan_as_station &&
 900             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 901              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 902                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 903                 drv->ap_scan_as_station = 0;
 904         }
 905
 906         switch (gnlh->cmd) {
 907         case NL80211_CMD_TRIGGER_SCAN:
 908                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 909                 break;
 910         case NL80211_CMD_NEW_SCAN_RESULTS:
 911                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 912                 drv->scan_complete_events = 1;
 913                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 914                                      drv->ctx);
 915                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 916                 break;
 917         case NL80211_CMD_SCAN_ABORTED:
 918                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 919                 /*
 920                  * Need to indicate that scan results are available in order
 921                  * not to make wpa_supplicant stop its scanning.
 922                  */
 923                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 924                                      drv->ctx);
 925                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 926                 break;
 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                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 944                         /*
 945                          * Avoid reporting two disassociation events that could
 946                          * confuse the core code.
 947                          */
 948                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 949                                    "event when using userspace SME");
 950                         break;
 951                 }
 952                 drv->associated = 0;
 953                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 954                 break;
 955         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 956                 mlme_event_michael_mic_failure(drv, tb);
 957                 break;
 958         case NL80211_CMD_JOIN_IBSS:
 959                 mlme_event_join_ibss(drv, tb);
 960                 break;
 961         default:
 962                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 963                            "(cmd=%d)", gnlh->cmd);
 964                 break;
 965         }
 966
 967         return NL_SKIP;
 968 }
 969
 970
 971 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 972                                              void *sock_ctx)
 973 {
 974         struct nl_cb *cb;
 975         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 976
 977         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 978
 979         cb = nl_cb_clone(drv->nl_cb);
 980         if (!cb)
 981                 return;
 982         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 983         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 984         nl_recvmsgs(drv->nl_handle_event, cb);
 985         nl_cb_put(cb);
 986 }
 987
 988
 989 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 990                                    const char *ifname, int dev_up)
 991 {
 992         struct ifreq ifr;
 993
 994         if (drv->ioctl_sock < 0)
 995                 return -1;
 996
 997         os_memset(&ifr, 0, sizeof(ifr));
 998         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 999
1000         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
1001                 perror("ioctl[SIOCGIFFLAGS]");
1002                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
1003                            ifname);
1004                 return -1;
1005         }
1006
1007         if (dev_up) {
1008                 if (ifr.ifr_flags & IFF_UP)
1009                         return 0;
1010                 ifr.ifr_flags |= IFF_UP;
1011         } else {
1012                 if (!(ifr.ifr_flags & IFF_UP))
1013                         return 0;
1014                 ifr.ifr_flags &= ~IFF_UP;
1015         }
1016
1017         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
1018                 perror("ioctl[SIOCSIFFLAGS]");
1019                 return -1;
1020         }
1021
1022         return 0;
1023 }
1024
1025
1026 /**
1027  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1028  * @priv: driver_nl80211 private data
1029  * @alpha2_arg: country to which to switch to
1030  * Returns: 0 on success, -1 on failure
1031  *
1032  * This asks nl80211 to set the regulatory domain for given
1033  * country ISO / IEC alpha2.
1034  */
1035 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1036 {
1037         struct wpa_driver_nl80211_data *drv = priv;
1038         char alpha2[3];
1039         struct nl_msg *msg;
1040
1041         msg = nlmsg_alloc();
1042         if (!msg)
1043                 return -ENOMEM;
1044
1045         alpha2[0] = alpha2_arg[0];
1046         alpha2[1] = alpha2_arg[1];
1047         alpha2[2] = '\0';
1048
1049         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1050                     0, NL80211_CMD_REQ_SET_REG, 0);
1051
1052         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1053         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1054                 return -EINVAL;
1055         return 0;
1056 nla_put_failure:
1057         return -EINVAL;
1058 }
1059
1060
1061 #ifndef HOSTAPD
1062 struct wiphy_info_data {
1063         int max_scan_ssids;
1064         int ap_supported;
1065         int auth_supported;
1066         int connect_supported;
1067 };
1068
1069
1070 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1071 {
1072         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1073         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1074         struct wiphy_info_data *info = arg;
1075
1076         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1077                   genlmsg_attrlen(gnlh, 0), NULL);
1078
1079         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1080                 info->max_scan_ssids =
1081                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1082
1083         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1084                 struct nlattr *nl_mode;
1085                 int i;
1086                 nla_for_each_nested(nl_mode,
1087                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1088                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1089                                 info->ap_supported = 1;
1090                                 break;
1091                         }
1092                 }
1093         }
1094
1095         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1096                 struct nlattr *nl_cmd;
1097                 int i;
1098
1099                 nla_for_each_nested(nl_cmd,
1100                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1101                         u32 cmd = nla_get_u32(nl_cmd);
1102                         if (cmd == NL80211_CMD_AUTHENTICATE)
1103                                 info->auth_supported = 1;
1104                         else if (cmd == NL80211_CMD_CONNECT)
1105                                 info->connect_supported = 1;
1106                 }
1107         }
1108
1109         return NL_SKIP;
1110 }
1111
1112
1113 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1114                                        struct wiphy_info_data *info)
1115 {
1116         struct nl_msg *msg;
1117
1118         os_memset(info, 0, sizeof(*info));
1119         msg = nlmsg_alloc();
1120         if (!msg)
1121                 return -1;
1122
1123         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1124                     0, NL80211_CMD_GET_WIPHY, 0);
1125
1126         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1127
1128         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1129                 return 0;
1130         msg = NULL;
1131 nla_put_failure:
1132         nlmsg_free(msg);
1133         return -1;
1134 }
1135
1136
1137 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1138 {
1139         struct wiphy_info_data info;
1140         if (wpa_driver_nl80211_get_info(drv, &info))
1141                 return -1;
1142         drv->has_capability = 1;
1143         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1144         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1145                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1146                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1147                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1148         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1149                 WPA_DRIVER_CAPA_ENC_WEP104 |
1150                 WPA_DRIVER_CAPA_ENC_TKIP |
1151                 WPA_DRIVER_CAPA_ENC_CCMP;
1152
1153         drv->capa.max_scan_ssids = info.max_scan_ssids;
1154         if (info.ap_supported)
1155                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1156
1157         if (info.auth_supported)
1158                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1159         else if (!info.connect_supported) {
1160                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1161                            "authentication/association or connect commands");
1162                 return -1;
1163         }
1164
1165         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1166
1167         return 0;
1168 }
1169 #endif /* HOSTAPD */
1170
1171
1172 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1173                                       void *ctx)
1174 {
1175         int ret;
1176
1177         /* Initialize generic netlink and nl80211 */
1178
1179         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1180         if (drv->nl_cb == NULL) {
1181                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1182                            "callbacks");
1183                 goto err1;
1184         }
1185
1186         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1187         if (drv->nl_handle == NULL) {
1188                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1189                            "callbacks");
1190                 goto err2;
1191         }
1192
1193         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1194         if (drv->nl_handle_event == NULL) {
1195                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1196                            "callbacks (event)");
1197                 goto err2b;
1198         }
1199
1200         if (genl_connect(drv->nl_handle)) {
1201                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1202                            "netlink");
1203                 goto err3;
1204         }
1205
1206         if (genl_connect(drv->nl_handle_event)) {
1207                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1208                            "netlink (event)");
1209                 goto err3;
1210         }
1211
1212 #ifdef CONFIG_LIBNL20
1213         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1214                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1215                            "netlink cache");
1216                 goto err3;
1217         }
1218         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1219             0) {
1220                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1221                            "netlink cache (event)");
1222                 goto err3b;
1223         }
1224 #else /* CONFIG_LIBNL20 */
1225         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1226         if (drv->nl_cache == NULL) {
1227                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1228                            "netlink cache");
1229                 goto err3;
1230         }
1231         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1232         if (drv->nl_cache_event == NULL) {
1233                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1234                            "netlink cache (event)");
1235                 goto err3b;
1236         }
1237 #endif /* CONFIG_LIBNL20 */
1238
1239         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1240         if (drv->nl80211 == NULL) {
1241                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1242                            "found");
1243                 goto err4;
1244         }
1245
1246         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1247         if (ret >= 0)
1248                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1249         if (ret < 0) {
1250                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1251                            "membership for scan events: %d (%s)",
1252                            ret, strerror(-ret));
1253                 goto err4;
1254         }
1255
1256         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1257         if (ret >= 0)
1258                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1259         if (ret < 0) {
1260                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1261                            "membership for mlme events: %d (%s)",
1262                            ret, strerror(-ret));
1263                 goto err4;
1264         }
1265
1266         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1267                                  wpa_driver_nl80211_event_receive, drv, ctx);
1268
1269         return 0;
1270
1271 err4:
1272         nl_cache_free(drv->nl_cache_event);
1273 err3b:
1274         nl_cache_free(drv->nl_cache);
1275 err3:
1276         nl_handle_destroy(drv->nl_handle_event);
1277 err2b:
1278         nl_handle_destroy(drv->nl_handle);
1279 err2:
1280         nl_cb_put(drv->nl_cb);
1281 err1:
1282         return -1;
1283 }
1284
1285
1286 static int wpa_driver_nl80211_init_link_events(
1287         struct wpa_driver_nl80211_data *drv)
1288 {
1289 #ifdef HOSTAPD
1290         return 0;
1291 #else /* HOSTAPD */
1292         int s;
1293         struct sockaddr_nl local;
1294
1295         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1296         if (s < 0) {
1297                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1298                 return -1;
1299         }
1300
1301         os_memset(&local, 0, sizeof(local));
1302         local.nl_family = AF_NETLINK;
1303         local.nl_groups = RTMGRP_LINK;
1304         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1305                 perror("bind(netlink)");
1306                 close(s);
1307                 return -1;
1308         }
1309
1310         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1311                                  drv->ctx);
1312         drv->link_event_sock = s;
1313
1314         return 0;
1315 #endif /* HOSTAPD */
1316 }
1317
1318
1319 /**
1320  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1321  * @ctx: context to be used when calling wpa_supplicant functions,
1322  * e.g., wpa_supplicant_event()
1323  * @ifname: interface name, e.g., wlan0
1324  * Returns: Pointer to private data, %NULL on failure
1325  */
1326 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1327 {
1328         struct wpa_driver_nl80211_data *drv;
1329
1330         drv = os_zalloc(sizeof(*drv));
1331         if (drv == NULL)
1332                 return NULL;
1333         drv->ctx = ctx;
1334         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1335         drv->monitor_ifidx = -1;
1336         drv->monitor_sock = -1;
1337         drv->link_event_sock = -1;
1338         drv->ioctl_sock = -1;
1339
1340         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1341                 os_free(drv);
1342                 return NULL;
1343         }
1344
1345         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1346         if (drv->ioctl_sock < 0) {
1347                 perror("socket(PF_INET,SOCK_DGRAM)");
1348                 goto failed;
1349         }
1350
1351         if (wpa_driver_nl80211_init_link_events(drv) ||
1352             wpa_driver_nl80211_finish_drv_init(drv))
1353                 goto failed;
1354
1355         return drv;
1356
1357 failed:
1358         if (drv->link_event_sock >= 0) {
1359                 eloop_unregister_read_sock(drv->link_event_sock);
1360                 close(drv->link_event_sock);
1361         }
1362         if (drv->ioctl_sock >= 0)
1363                 close(drv->ioctl_sock);
1364
1365         genl_family_put(drv->nl80211);
1366         nl_cache_free(drv->nl_cache);
1367         nl_handle_destroy(drv->nl_handle);
1368         nl_cb_put(drv->nl_cb);
1369
1370         os_free(drv);
1371         return NULL;
1372 }
1373
1374
1375 static int
1376 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1377 {
1378         drv->ifindex = if_nametoindex(drv->ifname);
1379
1380 #ifndef HOSTAPD
1381         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1382                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1383                            "use managed mode");
1384         }
1385
1386         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1387                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1388                            "UP", drv->ifname);
1389                 return -1;
1390         }
1391
1392         if (wpa_driver_nl80211_capa(drv))
1393                 return -1;
1394
1395         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1396 #endif /* HOSTAPD */
1397
1398         return 0;
1399 }
1400
1401
1402 #ifdef HOSTAPD
1403 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1404 {
1405         struct i802_bss *bss, *prev;
1406         bss = drv->bss.next;
1407         while (bss) {
1408                 prev = bss;
1409                 bss = bss->next;
1410                 os_free(bss);
1411         }
1412 }
1413 #endif /* HOSTAPD */
1414
1415
1416 #if defined(CONFIG_AP) || defined(HOSTAPD)
1417 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1418 {
1419         struct nl_msg *msg;
1420
1421         msg = nlmsg_alloc();
1422         if (!msg)
1423                 return -ENOMEM;
1424
1425         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1426                     0, NL80211_CMD_DEL_BEACON, 0);
1427         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1428
1429         return send_and_recv_msgs(drv, msg, NULL, NULL);
1430  nla_put_failure:
1431         return -ENOBUFS;
1432 }
1433 #endif /* CONFIG_AP || HOSTAPD */
1434
1435
1436 /**
1437  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1438  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1439  *
1440  * Shut down driver interface and processing of driver events. Free
1441  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1442  */
1443 static void wpa_driver_nl80211_deinit(void *priv)
1444 {
1445         struct wpa_driver_nl80211_data *drv = priv;
1446
1447 #if defined(CONFIG_AP) || defined(HOSTAPD)
1448         nl80211_remove_monitor_interface(drv);
1449         if (drv->monitor_sock >= 0) {
1450                 eloop_unregister_read_sock(drv->monitor_sock);
1451                 close(drv->monitor_sock);
1452         }
1453
1454         if (drv->nlmode == NL80211_IFTYPE_AP)
1455                 wpa_driver_nl80211_del_beacon(drv);
1456 #endif /* CONFIG_AP || HOSTAPD */
1457
1458 #ifdef HOSTAPD
1459         if (drv->last_freq_ht) {
1460                 /* Clear HT flags from the driver */
1461                 struct hostapd_freq_params freq;
1462                 os_memset(&freq, 0, sizeof(freq));
1463                 freq.freq = drv->last_freq;
1464                 i802_set_freq(priv, &freq);
1465         }
1466
1467         if (drv->eapol_sock >= 0) {
1468                 eloop_unregister_read_sock(drv->eapol_sock);
1469                 close(drv->eapol_sock);
1470         }
1471
1472         if (drv->if_indices != drv->default_if_indices)
1473                 os_free(drv->if_indices);
1474
1475         wpa_driver_nl80211_free_bss(drv);
1476 #else /* HOSTAPD */
1477
1478         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1479
1480         if (drv->link_event_sock >= 0) {
1481                 eloop_unregister_read_sock(drv->link_event_sock);
1482                 close(drv->link_event_sock);
1483         }
1484 #endif /* HOSTAPD */
1485
1486         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1487
1488         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1489         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1490
1491         if (drv->ioctl_sock >= 0)
1492                 close(drv->ioctl_sock);
1493
1494         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1495         genl_family_put(drv->nl80211);
1496         nl_cache_free(drv->nl_cache);
1497         nl_cache_free(drv->nl_cache_event);
1498         nl_handle_destroy(drv->nl_handle);
1499         nl_handle_destroy(drv->nl_handle_event);
1500         nl_cb_put(drv->nl_cb);
1501
1502         os_free(drv);
1503 }
1504
1505
1506 /**
1507  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1508  * @eloop_ctx: Driver private data
1509  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1510  *
1511  * This function can be used as registered timeout when starting a scan to
1512  * generate a scan completed event if the driver does not report this.
1513  */
1514 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1515 {
1516         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1517         if (drv->ap_scan_as_station) {
1518                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1519                 drv->ap_scan_as_station = 0;
1520         }
1521         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1522         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1523 }
1524
1525
1526 /**
1527  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1528  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1529  * @params: Scan parameters
1530  * Returns: 0 on success, -1 on failure
1531  */
1532 static int wpa_driver_nl80211_scan(void *priv,
1533                                    struct wpa_driver_scan_params *params)
1534 {
1535         struct wpa_driver_nl80211_data *drv = priv;
1536         int ret = 0, timeout;
1537         struct nl_msg *msg, *ssids, *freqs;
1538         size_t i;
1539
1540         msg = nlmsg_alloc();
1541         ssids = nlmsg_alloc();
1542         freqs = nlmsg_alloc();
1543         if (!msg || !ssids || !freqs) {
1544                 nlmsg_free(msg);
1545                 nlmsg_free(ssids);
1546                 nlmsg_free(freqs);
1547                 return -1;
1548         }
1549
1550         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1551                     NL80211_CMD_TRIGGER_SCAN, 0);
1552
1553         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1554
1555         for (i = 0; i < params->num_ssids; i++) {
1556                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1557                         params->ssids[i].ssid);
1558         }
1559         if (params->num_ssids)
1560                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1561
1562         if (params->extra_ies) {
1563                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1564                         params->extra_ies);
1565         }
1566
1567         if (params->freqs) {
1568                 for (i = 0; params->freqs[i]; i++)
1569                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1570                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1571         }
1572
1573         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1574         msg = NULL;
1575         if (ret) {
1576                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1577                            "(%s)", ret, strerror(-ret));
1578 #ifdef HOSTAPD
1579                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1580                         /*
1581                          * mac80211 does not allow scan requests in AP mode, so
1582                          * try to do this in station mode.
1583                          */
1584                         if (wpa_driver_nl80211_set_mode(drv,
1585                                                         IEEE80211_MODE_INFRA))
1586                                 goto nla_put_failure;
1587
1588                         if (wpa_driver_nl80211_scan(drv, params)) {
1589                                 wpa_driver_nl80211_set_mode(drv,
1590                                                             IEEE80211_MODE_AP);
1591                                 goto nla_put_failure;
1592                         }
1593
1594                         /* Restore AP mode when processing scan results */
1595                         drv->ap_scan_as_station = 1;
1596                         ret = 0;
1597                 } else
1598                         goto nla_put_failure;
1599 #else /* HOSTAPD */
1600                 goto nla_put_failure;
1601 #endif /* HOSTAPD */
1602         }
1603
1604         /* Not all drivers generate "scan completed" wireless event, so try to
1605          * read results after a timeout. */
1606         timeout = 10;
1607         if (drv->scan_complete_events) {
1608                 /*
1609                  * The driver seems to deliver events to notify when scan is
1610                  * complete, so use longer timeout to avoid race conditions
1611                  * with scanning and following association request.
1612                  */
1613                 timeout = 30;
1614         }
1615         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1616                    "seconds", ret, timeout);
1617         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1618         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1619                                drv, drv->ctx);
1620
1621 nla_put_failure:
1622         nlmsg_free(ssids);
1623         nlmsg_free(msg);
1624         nlmsg_free(freqs);
1625         return ret;
1626 }
1627
1628
1629 static int bss_info_handler(struct nl_msg *msg, void *arg)
1630 {
1631         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1632         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1633         struct nlattr *bss[NL80211_BSS_MAX + 1];
1634         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1635                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1636                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1637                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1638                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1639                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1640                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1641                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1642                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1643                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1644                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1645         };
1646         struct wpa_scan_results *res = arg;
1647         struct wpa_scan_res **tmp;
1648         struct wpa_scan_res *r;
1649         const u8 *ie;
1650         size_t ie_len;
1651
1652         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1653                   genlmsg_attrlen(gnlh, 0), NULL);
1654         if (!tb[NL80211_ATTR_BSS])
1655                 return NL_SKIP;
1656         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1657                              bss_policy))
1658                 return NL_SKIP;
1659         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1660                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1661                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1662         } else {
1663                 ie = NULL;
1664                 ie_len = 0;
1665         }
1666
1667         r = os_zalloc(sizeof(*r) + ie_len);
1668         if (r == NULL)
1669                 return NL_SKIP;
1670         if (bss[NL80211_BSS_BSSID])
1671                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1672                           ETH_ALEN);
1673         if (bss[NL80211_BSS_FREQUENCY])
1674                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1675         if (bss[NL80211_BSS_BEACON_INTERVAL])
1676                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1677         if (bss[NL80211_BSS_CAPABILITY])
1678                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1679         r->flags |= WPA_SCAN_NOISE_INVALID;
1680         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1681                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1682                 r->level /= 100; /* mBm to dBm */
1683                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1684         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1685                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1686                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1687         } else
1688                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1689         if (bss[NL80211_BSS_TSF])
1690                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1691         if (bss[NL80211_BSS_SEEN_MS_AGO])
1692                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1693         r->ie_len = ie_len;
1694         if (ie)
1695                 os_memcpy(r + 1, ie, ie_len);
1696
1697         if (bss[NL80211_BSS_STATUS]) {
1698                 enum nl80211_bss_status status;
1699                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1700                 switch (status) {
1701                 case NL80211_BSS_STATUS_AUTHENTICATED:
1702                         r->flags |= WPA_SCAN_AUTHENTICATED;
1703                         break;
1704                 case NL80211_BSS_STATUS_ASSOCIATED:
1705                         r->flags |= WPA_SCAN_ASSOCIATED;
1706                         break;
1707                 default:
1708                         break;
1709                 }
1710         }
1711
1712         tmp = os_realloc(res->res,
1713                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1714         if (tmp == NULL) {
1715                 os_free(r);
1716                 return NL_SKIP;
1717         }
1718         tmp[res->num++] = r;
1719         res->res = tmp;
1720
1721         return NL_SKIP;
1722 }
1723
1724
1725 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1726                                  const u8 *addr)
1727 {
1728         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1729                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1730                            "mismatch");
1731                 wpa_driver_nl80211_mlme(drv, addr,
1732                                         NL80211_CMD_DEAUTHENTICATE,
1733                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1734         }
1735 }
1736
1737
1738 static void wpa_driver_nl80211_check_bss_status(
1739         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1740 {
1741         size_t i;
1742
1743         for (i = 0; i < res->num; i++) {
1744                 struct wpa_scan_res *r = res->res[i];
1745                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1746                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1747                                    "indicates BSS status with " MACSTR
1748                                    " as authenticated",
1749                                    MAC2STR(r->bssid));
1750                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1751                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1752                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1753                             0) {
1754                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1755                                            " in local state (auth=" MACSTR
1756                                            " assoc=" MACSTR ")",
1757                                            MAC2STR(drv->auth_bssid),
1758                                            MAC2STR(drv->bssid));
1759                         }
1760                 }
1761
1762                 if (r->flags & WPA_SCAN_ASSOCIATED) {
1763                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1764                                    "indicate BSS status with " MACSTR
1765                                    " as associated",
1766                                    MAC2STR(r->bssid));
1767                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1768                             !drv->associated) {
1769                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1770                                            "(not associated) does not match "
1771                                            "with BSS state");
1772                                 clear_state_mismatch(drv, r->bssid);
1773                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1774                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1775                                    0) {
1776                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1777                                            "(associated with " MACSTR ") does "
1778                                            "not match with BSS state",
1779                                            MAC2STR(drv->bssid));
1780                                 clear_state_mismatch(drv, r->bssid);
1781                                 clear_state_mismatch(drv, drv->bssid);
1782                         }
1783                 }
1784         }
1785 }
1786
1787
1788 /**
1789  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1790  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1791  * Returns: Scan results on success, -1 on failure
1792  */
1793 static struct wpa_scan_results *
1794 wpa_driver_nl80211_get_scan_results(void *priv)
1795 {
1796         struct wpa_driver_nl80211_data *drv = priv;
1797         struct nl_msg *msg;
1798         struct wpa_scan_results *res;
1799         int ret;
1800
1801         res = os_zalloc(sizeof(*res));
1802         if (res == NULL)
1803                 return NULL;
1804         msg = nlmsg_alloc();
1805         if (!msg)
1806                 goto nla_put_failure;
1807
1808         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1809                     NL80211_CMD_GET_SCAN, 0);
1810         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1811
1812         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1813         msg = NULL;
1814         if (ret == 0) {
1815                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1816                            (unsigned long) res->num);
1817                 wpa_driver_nl80211_check_bss_status(drv, res);
1818                 return res;
1819         }
1820         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1821                    "(%s)", ret, strerror(-ret));
1822 nla_put_failure:
1823         nlmsg_free(msg);
1824         wpa_scan_results_free(res);
1825         return NULL;
1826 }
1827
1828
1829 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1830                                       wpa_alg alg, const u8 *addr, int key_idx,
1831                                       int set_tx,
1832                                       const u8 *seq, size_t seq_len,
1833                                       const u8 *key, size_t key_len)
1834 {
1835         struct wpa_driver_nl80211_data *drv = priv;
1836         int ifindex = if_nametoindex(ifname);
1837         struct nl_msg *msg;
1838         int ret;
1839
1840         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1841                    "set_tx=%d seq_len=%lu key_len=%lu",
1842                    __func__, ifindex, alg, addr, key_idx, set_tx,
1843                    (unsigned long) seq_len, (unsigned long) key_len);
1844
1845         msg = nlmsg_alloc();
1846         if (!msg)
1847                 return -ENOMEM;
1848
1849         if (alg == WPA_ALG_NONE) {
1850                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1851                             0, NL80211_CMD_DEL_KEY, 0);
1852         } else {
1853                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1854                             0, NL80211_CMD_NEW_KEY, 0);
1855                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1856                 switch (alg) {
1857                 case WPA_ALG_WEP:
1858                         if (key_len == 5)
1859                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1860                                             WLAN_CIPHER_SUITE_WEP40);
1861                         else
1862                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1863                                             WLAN_CIPHER_SUITE_WEP104);
1864                         break;
1865                 case WPA_ALG_TKIP:
1866                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1867                                     WLAN_CIPHER_SUITE_TKIP);
1868                         break;
1869                 case WPA_ALG_CCMP:
1870                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1871                                     WLAN_CIPHER_SUITE_CCMP);
1872                         break;
1873                 case WPA_ALG_IGTK:
1874                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1875                                     WLAN_CIPHER_SUITE_AES_CMAC);
1876                         break;
1877                 default:
1878                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1879                                    "algorithm %d", __func__, alg);
1880                         nlmsg_free(msg);
1881                         return -1;
1882                 }
1883         }
1884
1885         if (seq && seq_len)
1886                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1887
1888         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1889         {
1890                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1891                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1892         }
1893         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1894         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1895
1896         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1897         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1898                 ret = 0;
1899         if (ret)
1900                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1901                            ret, strerror(-ret));
1902
1903         /*
1904          * If we failed or don't need to set the default TX key (below),
1905          * we're done here.
1906          */
1907         if (ret || !set_tx || alg == WPA_ALG_NONE)
1908                 return ret;
1909 #ifdef HOSTAPD /* FIX: is this needed? */
1910         if (addr)
1911                 return ret;
1912 #endif /* HOSTAPD */
1913
1914         msg = nlmsg_alloc();
1915         if (!msg)
1916                 return -ENOMEM;
1917
1918         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1919                     0, NL80211_CMD_SET_KEY, 0);
1920         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1921         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1922         if (alg == WPA_ALG_IGTK)
1923                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1924         else
1925                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1926
1927         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1928         if (ret == -ENOENT)
1929                 ret = 0;
1930         if (ret)
1931                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1932                            "err=%d %s)", ret, strerror(-ret));
1933         return ret;
1934
1935 nla_put_failure:
1936         return -ENOBUFS;
1937 }
1938
1939
1940 static int nl_add_key(struct nl_msg *msg, wpa_alg alg,
1941                       int key_idx, int defkey,
1942                       const u8 *seq, size_t seq_len,
1943                       const u8 *key, size_t key_len)
1944 {
1945         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1946         if (!key_attr)
1947                 return -1;
1948
1949         if (defkey && alg == WPA_ALG_IGTK)
1950                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1951         else if (defkey)
1952                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1953
1954         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1955
1956         switch (alg) {
1957         case WPA_ALG_WEP:
1958                 if (key_len == 5)
1959                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1960                                     WLAN_CIPHER_SUITE_WEP40);
1961                 else
1962                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1963                                     WLAN_CIPHER_SUITE_WEP104);
1964                 break;
1965         case WPA_ALG_TKIP:
1966                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1967                 break;
1968         case WPA_ALG_CCMP:
1969                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1970                 break;
1971         case WPA_ALG_IGTK:
1972                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1973                             WLAN_CIPHER_SUITE_AES_CMAC);
1974                 break;
1975         default:
1976                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1977                            "algorithm %d", __func__, alg);
1978                 return -1;
1979         }
1980
1981         if (seq && seq_len)
1982                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1983
1984         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1985
1986         nla_nest_end(msg, key_attr);
1987
1988         return 0;
1989  nla_put_failure:
1990         return -1;
1991 }
1992
1993
1994 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1995                                  struct nl_msg *msg)
1996 {
1997         int i, privacy = 0;
1998         struct nlattr *nl_keys, *nl_key;
1999
2000         for (i = 0; i < 4; i++) {
2001                 if (!params->wep_key[i])
2002                         continue;
2003                 privacy = 1;
2004                 break;
2005         }
2006         if (!privacy)
2007                 return 0;
2008
2009         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2010
2011         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2012         if (!nl_keys)
2013                 goto nla_put_failure;
2014
2015         for (i = 0; i < 4; i++) {
2016                 if (!params->wep_key[i])
2017                         continue;
2018
2019                 nl_key = nla_nest_start(msg, i);
2020                 if (!nl_key)
2021                         goto nla_put_failure;
2022
2023                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2024                         params->wep_key[i]);
2025                 if (params->wep_key_len[i] == 5)
2026                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2027                                     WLAN_CIPHER_SUITE_WEP40);
2028                 else
2029                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2030                                     WLAN_CIPHER_SUITE_WEP104);
2031
2032                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2033
2034                 if (i == params->wep_tx_keyidx)
2035                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2036
2037                 nla_nest_end(msg, nl_key);
2038         }
2039         nla_nest_end(msg, nl_keys);
2040
2041         return 0;
2042
2043 nla_put_failure:
2044         return -ENOBUFS;
2045 }
2046
2047
2048 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2049                                    const u8 *addr, int cmd, u16 reason_code)
2050 {
2051         int ret = -1;
2052         struct nl_msg *msg;
2053
2054         msg = nlmsg_alloc();
2055         if (!msg)
2056                 return -1;
2057
2058         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2059
2060         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2061         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2062         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2063
2064         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2065         msg = NULL;
2066         if (ret) {
2067                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2068                            "(%s)", ret, strerror(-ret));
2069                 goto nla_put_failure;
2070         }
2071         ret = 0;
2072
2073 nla_put_failure:
2074         nlmsg_free(msg);
2075         return ret;
2076 }
2077
2078
2079 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2080                                          const u8 *addr, int reason_code)
2081 {
2082         wpa_printf(MSG_DEBUG, "%s", __func__);
2083         drv->associated = 0;
2084         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2085                                        reason_code);
2086 }
2087
2088
2089 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2090                                              int reason_code)
2091 {
2092         struct wpa_driver_nl80211_data *drv = priv;
2093         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2094                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2095         wpa_printf(MSG_DEBUG, "%s", __func__);
2096         drv->associated = 0;
2097         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2098                                        reason_code);
2099 }
2100
2101
2102 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2103                                            int reason_code)
2104 {
2105         struct wpa_driver_nl80211_data *drv = priv;
2106         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2107                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2108         wpa_printf(MSG_DEBUG, "%s", __func__);
2109         drv->associated = 0;
2110         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2111                                        reason_code);
2112 }
2113
2114
2115 static int wpa_driver_nl80211_authenticate(
2116         void *priv, struct wpa_driver_auth_params *params)
2117 {
2118         struct wpa_driver_nl80211_data *drv = priv;
2119         int ret = -1, i;
2120         struct nl_msg *msg;
2121         enum nl80211_auth_type type;
2122         int count = 0;
2123
2124         drv->associated = 0;
2125         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2126
2127         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
2128                 return -1;
2129
2130 retry:
2131         msg = nlmsg_alloc();
2132         if (!msg)
2133                 return -1;
2134
2135         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2136                    drv->ifindex);
2137
2138         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2139                     NL80211_CMD_AUTHENTICATE, 0);
2140
2141         for (i = 0; i < 4; i++) {
2142                 if (!params->wep_key[i])
2143                         continue;
2144                 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
2145                                            i,
2146                                            i == params->wep_tx_keyidx, NULL, 0,
2147                                            params->wep_key[i],
2148                                            params->wep_key_len[i]);
2149                 if (params->wep_tx_keyidx != i)
2150                         continue;
2151                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2152                                params->wep_key[i], params->wep_key_len[i])) {
2153                         nlmsg_free(msg);
2154                         return -1;
2155                 }
2156         }
2157
2158         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2159         if (params->bssid) {
2160                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2161                            MAC2STR(params->bssid));
2162                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2163         }
2164         if (params->freq) {
2165                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2166                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2167         }
2168         if (params->ssid) {
2169                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2170                                   params->ssid, params->ssid_len);
2171                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2172                         params->ssid);
2173         }
2174         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2175         if (params->ie)
2176                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2177         /*
2178          * TODO: if multiple auth_alg options enabled, try them one by one if
2179          * the AP rejects authentication due to unknown auth alg
2180          */
2181         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2182                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2183         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2184                 type = NL80211_AUTHTYPE_SHARED_KEY;
2185         else if (params->auth_alg & AUTH_ALG_LEAP)
2186                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2187         else if (params->auth_alg & AUTH_ALG_FT)
2188                 type = NL80211_AUTHTYPE_FT;
2189         else
2190                 goto nla_put_failure;
2191         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2192         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2193
2194         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2195         msg = NULL;
2196         if (ret) {
2197                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2198                            "(%s)", ret, strerror(-ret));
2199                 count++;
2200                 if (ret == -EALREADY && count == 1 && params->bssid) {
2201                         /*
2202                          * mac80211 does not currently accept new
2203                          * authentication if we are already authenticated. As a
2204                          * workaround, force deauthentication and try again.
2205                          */
2206                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2207                                    "after forced deauthentication");
2208                         wpa_driver_nl80211_deauthenticate(
2209                                 drv, params->bssid,
2210                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2211                         nlmsg_free(msg);
2212                         goto retry;
2213                 }
2214                 goto nla_put_failure;
2215         }
2216         ret = 0;
2217         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2218                    "successfully");
2219
2220 nla_put_failure:
2221         nlmsg_free(msg);
2222         return ret;
2223 }
2224
2225
2226 #if defined(CONFIG_AP) || defined(HOSTAPD)
2227
2228 struct phy_info_arg {
2229         u16 *num_modes;
2230         struct hostapd_hw_modes *modes;
2231 };
2232
2233 static int phy_info_handler(struct nl_msg *msg, void *arg)
2234 {
2235         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2236         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2237         struct phy_info_arg *phy_info = arg;
2238
2239         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2240
2241         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2242         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2243                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2244                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2245                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2246                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2247                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2248                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2249         };
2250
2251         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2252         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2253                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2254                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2255         };
2256
2257         struct nlattr *nl_band;
2258         struct nlattr *nl_freq;
2259         struct nlattr *nl_rate;
2260         int rem_band, rem_freq, rem_rate;
2261         struct hostapd_hw_modes *mode;
2262         int idx, mode_is_set;
2263
2264         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2265                   genlmsg_attrlen(gnlh, 0), NULL);
2266
2267         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2268                 return NL_SKIP;
2269
2270         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2271                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2272                 if (!mode)
2273                         return NL_SKIP;
2274                 phy_info->modes = mode;
2275
2276                 mode_is_set = 0;
2277
2278                 mode = &phy_info->modes[*(phy_info->num_modes)];
2279                 memset(mode, 0, sizeof(*mode));
2280                 *(phy_info->num_modes) += 1;
2281
2282                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2283                           nla_len(nl_band), NULL);
2284
2285                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2286                         mode->ht_capab = nla_get_u16(
2287                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2288                 }
2289
2290                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2291                         mode->a_mpdu_params |= nla_get_u8(
2292                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2293                                 0x03;
2294                 }
2295
2296                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2297                         mode->a_mpdu_params |= nla_get_u8(
2298                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2299                                 2;
2300                 }
2301
2302                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2303                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2304                         u8 *mcs;
2305                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2306                         os_memcpy(mode->mcs_set, mcs, 16);
2307                 }
2308
2309                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2310                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2311                                   nla_len(nl_freq), freq_policy);
2312                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2313                                 continue;
2314                         mode->num_channels++;
2315                 }
2316
2317                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
2318                 if (!mode->channels)
2319                         return NL_SKIP;
2320
2321                 idx = 0;
2322
2323                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2324                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2325                                   nla_len(nl_freq), freq_policy);
2326                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2327                                 continue;
2328
2329                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2330                         mode->channels[idx].flag = 0;
2331
2332                         if (!mode_is_set) {
2333                                 /* crude heuristic */
2334                                 if (mode->channels[idx].freq < 4000)
2335                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2336                                 else
2337                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2338                                 mode_is_set = 1;
2339                         }
2340
2341                         /* crude heuristic */
2342                         if (mode->channels[idx].freq < 4000)
2343                                 if (mode->channels[idx].freq == 2484)
2344                                         mode->channels[idx].chan = 14;
2345                                 else
2346                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2347                         else
2348                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2349
2350                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2351                                 mode->channels[idx].flag |=
2352                                         HOSTAPD_CHAN_DISABLED;
2353                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2354                                 mode->channels[idx].flag |=
2355                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2356                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2357                                 mode->channels[idx].flag |=
2358                                         HOSTAPD_CHAN_NO_IBSS;
2359                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2360                                 mode->channels[idx].flag |=
2361                                         HOSTAPD_CHAN_RADAR;
2362
2363                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2364                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2365                                 mode->channels[idx].max_tx_power =
2366                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2367
2368                         idx++;
2369                 }
2370
2371                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2372                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2373                                   nla_len(nl_rate), rate_policy);
2374                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2375                                 continue;
2376                         mode->num_rates++;
2377                 }
2378
2379                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
2380                 if (!mode->rates)
2381                         return NL_SKIP;
2382
2383                 idx = 0;
2384
2385                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2386                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2387                                   nla_len(nl_rate), rate_policy);
2388                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2389                                 continue;
2390                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2391
2392                         /* crude heuristic */
2393                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2394                             mode->rates[idx].rate > 200)
2395                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2396
2397                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2398                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
2399
2400                         idx++;
2401                 }
2402         }
2403
2404         return NL_SKIP;
2405 }
2406
2407 static struct hostapd_hw_modes *
2408 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2409 {
2410         u16 m;
2411         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2412         int i, mode11g_idx = -1;
2413
2414         /* If only 802.11g mode is included, use it to construct matching
2415          * 802.11b mode data. */
2416
2417         for (m = 0; m < *num_modes; m++) {
2418                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2419                         return modes; /* 802.11b already included */
2420                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2421                         mode11g_idx = m;
2422         }
2423
2424         if (mode11g_idx < 0)
2425                 return modes; /* 2.4 GHz band not supported at all */
2426
2427         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2428         if (nmodes == NULL)
2429                 return modes; /* Could not add 802.11b mode */
2430
2431         mode = &nmodes[*num_modes];
2432         os_memset(mode, 0, sizeof(*mode));
2433         (*num_modes)++;
2434         modes = nmodes;
2435
2436         mode->mode = HOSTAPD_MODE_IEEE80211B;
2437
2438         mode11g = &modes[mode11g_idx];
2439         mode->num_channels = mode11g->num_channels;
2440         mode->channels = os_malloc(mode11g->num_channels *
2441                                    sizeof(struct hostapd_channel_data));
2442         if (mode->channels == NULL) {
2443                 (*num_modes)--;
2444                 return modes; /* Could not add 802.11b mode */
2445         }
2446         os_memcpy(mode->channels, mode11g->channels,
2447                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2448
2449         mode->num_rates = 0;
2450         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2451         if (mode->rates == NULL) {
2452                 os_free(mode->channels);
2453                 (*num_modes)--;
2454                 return modes; /* Could not add 802.11b mode */
2455         }
2456
2457         for (i = 0; i < mode11g->num_rates; i++) {
2458                 if (mode11g->rates[i].rate > 110 ||
2459                     mode11g->rates[i].flags &
2460                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2461                         continue;
2462                 mode->rates[mode->num_rates] = mode11g->rates[i];
2463                 mode->num_rates++;
2464                 if (mode->num_rates == 4)
2465                         break;
2466         }
2467
2468         if (mode->num_rates == 0) {
2469                 os_free(mode->channels);
2470                 os_free(mode->rates);
2471                 (*num_modes)--;
2472                 return modes; /* No 802.11b rates */
2473         }
2474
2475         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2476                    "information");
2477
2478         return modes;
2479 }
2480
2481
2482 static struct hostapd_hw_modes *
2483 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2484 {
2485         struct wpa_driver_nl80211_data *drv = priv;
2486         struct nl_msg *msg;
2487         struct phy_info_arg result = {
2488                 .num_modes = num_modes,
2489                 .modes = NULL,
2490         };
2491
2492         *num_modes = 0;
2493         *flags = 0;
2494
2495         msg = nlmsg_alloc();
2496         if (!msg)
2497                 return NULL;
2498
2499         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2500                     0, NL80211_CMD_GET_WIPHY, 0);
2501
2502         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2503
2504         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2505                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2506  nla_put_failure:
2507         return NULL;
2508 }
2509
2510
2511 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2512                                          const void *data, size_t len,
2513                                          int encrypt)
2514 {
2515         __u8 rtap_hdr[] = {
2516                 0x00, 0x00, /* radiotap version */
2517                 0x0e, 0x00, /* radiotap length */
2518                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2519                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2520                 0x00,       /* padding */
2521                 0x00, 0x00, /* RX and TX flags to indicate that */
2522                 0x00, 0x00, /* this is the injected frame directly */
2523         };
2524         struct iovec iov[2] = {
2525                 {
2526                         .iov_base = &rtap_hdr,
2527                         .iov_len = sizeof(rtap_hdr),
2528                 },
2529                 {
2530                         .iov_base = (void *) data,
2531                         .iov_len = len,
2532                 }
2533         };
2534         struct msghdr msg = {
2535                 .msg_name = NULL,
2536                 .msg_namelen = 0,
2537                 .msg_iov = iov,
2538                 .msg_iovlen = 2,
2539                 .msg_control = NULL,
2540                 .msg_controllen = 0,
2541                 .msg_flags = 0,
2542         };
2543
2544         if (encrypt)
2545                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2546
2547         return sendmsg(drv->monitor_sock, &msg, 0);
2548 }
2549
2550
2551 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2552                                         size_t data_len)
2553 {
2554         struct wpa_driver_nl80211_data *drv = priv;
2555         struct ieee80211_mgmt *mgmt;
2556         int encrypt = 1;
2557         u16 fc;
2558
2559         mgmt = (struct ieee80211_mgmt *) data;
2560         fc = le_to_host16(mgmt->frame_control);
2561
2562         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2563             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2564                 /*
2565                  * Only one of the authentication frame types is encrypted.
2566                  * In order for static WEP encryption to work properly (i.e.,
2567                  * to not encrypt the frame), we need to tell mac80211 about
2568                  * the frames that must not be encrypted.
2569                  */
2570                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2571                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2572                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2573                         encrypt = 0;
2574         }
2575
2576         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2577 }
2578
2579 #endif /* CONFIG_AP || HOSTAPD */
2580
2581
2582 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2583                                          const u8 *head, size_t head_len,
2584                                          const u8 *tail, size_t tail_len,
2585                                          int dtim_period, int beacon_int)
2586 {
2587         struct wpa_driver_nl80211_data *drv = priv;
2588         struct nl_msg *msg;
2589         u8 cmd = NL80211_CMD_NEW_BEACON;
2590         int ret;
2591         int beacon_set;
2592         int ifindex = if_nametoindex(ifname);
2593 #ifdef HOSTAPD
2594         struct i802_bss *bss;
2595
2596         bss = get_bss(drv, ifindex);
2597         if (bss == NULL)
2598                 return -ENOENT;
2599         beacon_set = bss->beacon_set;
2600 #else /* HOSTAPD */
2601         beacon_set = drv->beacon_set;
2602 #endif /* HOSTAPD */
2603
2604         msg = nlmsg_alloc();
2605         if (!msg)
2606                 return -ENOMEM;
2607
2608         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2609                    beacon_set);
2610         if (beacon_set)
2611                 cmd = NL80211_CMD_SET_BEACON;
2612
2613         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2614                     0, cmd, 0);
2615         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2616         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2617         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2618         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2619         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2620
2621         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2622         if (ret) {
2623                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2624                            ret, strerror(-ret));
2625         } else {
2626 #ifdef HOSTAPD
2627                 bss->beacon_set = 1;
2628 #else /* HOSTAPD */
2629                 drv->beacon_set = 1;
2630 #endif /* HOSTAPD */
2631         }
2632         return ret;
2633  nla_put_failure:
2634         return -ENOBUFS;
2635 }
2636
2637
2638 #if defined(CONFIG_AP) || defined(HOSTAPD)
2639
2640 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2641                                        int freq, int ht_enabled,
2642                                        int sec_channel_offset)
2643 {
2644         struct nl_msg *msg;
2645         int ret;
2646
2647         msg = nlmsg_alloc();
2648         if (!msg)
2649                 return -1;
2650
2651         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2652                     NL80211_CMD_SET_WIPHY, 0);
2653
2654         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2655         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2656         if (ht_enabled) {
2657                 switch (sec_channel_offset) {
2658                 case -1:
2659                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2660                                     NL80211_CHAN_HT40MINUS);
2661                         break;
2662                 case 1:
2663                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2664                                     NL80211_CHAN_HT40PLUS);
2665                         break;
2666                 default:
2667                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2668                                     NL80211_CHAN_HT20);
2669                         break;
2670                 }
2671         }
2672
2673         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2674         if (ret == 0)
2675                 return 0;
2676         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2677                    "%d (%s)", freq, ret, strerror(-ret));
2678 nla_put_failure:
2679         return -1;
2680 }
2681
2682
2683 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2684                                       struct hostapd_sta_add_params *params)
2685 {
2686         struct wpa_driver_nl80211_data *drv = priv;
2687         struct nl_msg *msg;
2688         int ret = -ENOBUFS;
2689
2690         msg = nlmsg_alloc();
2691         if (!msg)
2692                 return -ENOMEM;
2693
2694         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2695                     0, NL80211_CMD_NEW_STATION, 0);
2696
2697         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2698         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2699         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2700         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2701                 params->supp_rates);
2702         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2703                     params->listen_interval);
2704         if (params->ht_capabilities) {
2705                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2706                         sizeof(*params->ht_capabilities),
2707                         params->ht_capabilities);
2708         }
2709
2710         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2711         if (ret)
2712                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2713                            "result: %d (%s)", ret, strerror(-ret));
2714         if (ret == -EEXIST)
2715                 ret = 0;
2716  nla_put_failure:
2717         return ret;
2718 }
2719
2720
2721 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2722 {
2723         struct wpa_driver_nl80211_data *drv = priv;
2724         struct nl_msg *msg;
2725         int ret;
2726
2727         msg = nlmsg_alloc();
2728         if (!msg)
2729                 return -ENOMEM;
2730
2731         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2732                     0, NL80211_CMD_DEL_STATION, 0);
2733
2734         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2735                     if_nametoindex(drv->ifname));
2736         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2737
2738         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2739         if (ret == -ENOENT)
2740                 return 0;
2741         return ret;
2742  nla_put_failure:
2743         return -ENOBUFS;
2744 }
2745
2746
2747 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2748                                  int ifidx)
2749 {
2750         struct nl_msg *msg;
2751
2752 #ifdef HOSTAPD
2753         /* stop listening for EAPOL on this interface */
2754         del_ifidx(drv, ifidx);
2755 #endif /* HOSTAPD */
2756
2757         msg = nlmsg_alloc();
2758         if (!msg)
2759                 goto nla_put_failure;
2760
2761         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2762                     0, NL80211_CMD_DEL_INTERFACE, 0);
2763         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2764
2765         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2766                 return;
2767  nla_put_failure:
2768         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2769                    ifidx);
2770 }
2771
2772
2773 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2774                                      const char *ifname,
2775                                      enum nl80211_iftype iftype,
2776                                      const u8 *addr)
2777 {
2778         struct nl_msg *msg, *flags = NULL;
2779         int ifidx;
2780         int ret = -ENOBUFS;
2781
2782         msg = nlmsg_alloc();
2783         if (!msg)
2784                 return -1;
2785
2786         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2787                     0, NL80211_CMD_NEW_INTERFACE, 0);
2788         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2789         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2790         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2791
2792         if (iftype == NL80211_IFTYPE_MONITOR) {
2793                 int err;
2794
2795                 flags = nlmsg_alloc();
2796                 if (!flags)
2797                         goto nla_put_failure;
2798
2799                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2800
2801                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2802
2803                 nlmsg_free(flags);
2804
2805                 if (err)
2806                         goto nla_put_failure;
2807         }
2808
2809         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2810         if (ret) {
2811  nla_put_failure:
2812                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2813                            ifname, ret, strerror(-ret));
2814                 return ret;
2815         }
2816
2817         ifidx = if_nametoindex(ifname);
2818
2819         if (ifidx <= 0)
2820                 return -1;
2821
2822 #ifdef HOSTAPD
2823         /* start listening for EAPOL on this interface */
2824         add_ifidx(drv, ifidx);
2825
2826         if (addr && iftype == NL80211_IFTYPE_AP &&
2827             set_ifhwaddr(drv, ifname, addr)) {
2828                 nl80211_remove_iface(drv, ifidx);
2829                 return -1;
2830         }
2831 #endif /* HOSTAPD */
2832
2833         return ifidx;
2834 }
2835 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2836                                 const char *ifname, enum nl80211_iftype iftype,
2837                                 const u8 *addr)
2838 {
2839         int ret;
2840
2841         ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2842
2843         /* if error occured and interface exists already */
2844         if (ret == -ENFILE && if_nametoindex(ifname)) {
2845                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2846
2847                 /* Try to remove the interface that was already there. */
2848                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2849
2850                 /* Try to create the interface again */
2851                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2852         }
2853
2854         return ret;
2855 }
2856
2857 #endif /* CONFIG_AP || HOSTAPD */
2858
2859 #ifdef CONFIG_AP
2860
2861 void ap_tx_status(void *ctx, const u8 *addr,
2862                   const u8 *buf, size_t len, int ack);
2863 void ap_rx_from_unknown_sta(void *ctx, struct ieee80211_hdr *hdr, size_t len);
2864 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2865                 struct hostapd_frame_info *fi);
2866 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2867
2868 #endif /* CONFIG_AP */
2869
2870 #if defined(CONFIG_AP) || defined(HOSTAPD)
2871
2872 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2873 {
2874         struct ieee80211_hdr *hdr;
2875         u16 fc, type, stype;
2876
2877         hdr = (struct ieee80211_hdr *) buf;
2878         fc = le_to_host16(hdr->frame_control);
2879
2880         type = WLAN_FC_GET_TYPE(fc);
2881         stype = WLAN_FC_GET_STYPE(fc);
2882
2883         switch (type) {
2884         case WLAN_FC_TYPE_MGMT:
2885                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2886                            ok ? "ACK" : "fail");
2887 #ifdef HOSTAPD
2888                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2889 #else /* HOSTAPD */
2890                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2891 #endif /* HOSTAPD */
2892                 break;
2893         case WLAN_FC_TYPE_CTRL:
2894                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2895                            ok ? "ACK" : "fail");
2896                 break;
2897         case WLAN_FC_TYPE_DATA:
2898 #ifdef HOSTAPD
2899                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2900 #else /* HOSTAPD */
2901                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2902 #endif /* HOSTAPD */
2903                 break;
2904         default:
2905                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2906                            type);
2907                 break;
2908         }
2909 }
2910
2911
2912 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2913                              struct ieee80211_hdr *hdr, size_t len)
2914 {
2915 #ifdef HOSTAPD
2916         hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2917 #else /* HOSTAPD */
2918         ap_rx_from_unknown_sta(drv->ctx, hdr, len);
2919 #endif /* HOSTAPD */
2920 }
2921
2922
2923 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2924                          u8 *buf, size_t len,
2925                          struct hostapd_frame_info *hfi)
2926 {
2927         struct ieee80211_hdr *hdr;
2928         u16 fc, stype;
2929
2930         hdr = (struct ieee80211_hdr *) buf;
2931         fc = le_to_host16(hdr->frame_control);
2932         stype = WLAN_FC_GET_STYPE(fc);
2933
2934         switch (WLAN_FC_GET_TYPE(fc)) {
2935         case WLAN_FC_TYPE_MGMT:
2936                 if (stype != WLAN_FC_STYPE_BEACON &&
2937                     stype != WLAN_FC_STYPE_PROBE_REQ)
2938                         wpa_printf(MSG_MSGDUMP, "MGMT");
2939 #ifdef HOSTAPD
2940                 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2941 #else /* HOSTAPD */
2942                 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2943 #endif /* HOSTAPD */
2944                 break;
2945         case WLAN_FC_TYPE_CTRL:
2946                 /* can only get here with PS-Poll frames */
2947                 wpa_printf(MSG_DEBUG, "CTRL");
2948                 from_unknown_sta(drv, hdr, len);
2949                 break;
2950         case WLAN_FC_TYPE_DATA:
2951                 from_unknown_sta(drv, hdr, len);
2952                 break;
2953         }
2954 }
2955
2956
2957 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2958 {
2959         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2960         int len;
2961         unsigned char buf[3000];
2962         struct ieee80211_radiotap_iterator iter;
2963         int ret;
2964         struct hostapd_frame_info hfi;
2965         int injected = 0, failed = 0, rxflags = 0;
2966
2967         len = recv(sock, buf, sizeof(buf), 0);
2968         if (len < 0) {
2969                 perror("recv");
2970                 return;
2971         }
2972
2973         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2974                 printf("received invalid radiotap frame\n");
2975                 return;
2976         }
2977
2978         memset(&hfi, 0, sizeof(hfi));
2979
2980         while (1) {
2981                 ret = ieee80211_radiotap_iterator_next(&iter);
2982                 if (ret == -ENOENT)
2983                         break;
2984                 if (ret) {
2985                         printf("received invalid radiotap frame (%d)\n", ret);
2986                         return;
2987                 }
2988                 switch (iter.this_arg_index) {
2989                 case IEEE80211_RADIOTAP_FLAGS:
2990                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2991                                 len -= 4;
2992                         break;
2993                 case IEEE80211_RADIOTAP_RX_FLAGS:
2994                         rxflags = 1;
2995                         break;
2996                 case IEEE80211_RADIOTAP_TX_FLAGS:
2997                         injected = 1;
2998                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2999                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3000                         break;
3001                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3002                         break;
3003                 case IEEE80211_RADIOTAP_CHANNEL:
3004                         /* TODO convert from freq/flags to channel number
3005                         hfi.channel = XXX;
3006                          */
3007                         break;
3008                 case IEEE80211_RADIOTAP_RATE:
3009                         hfi.datarate = *iter.this_arg * 5;
3010                         break;
3011                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3012                         hfi.ssi_signal = *iter.this_arg;
3013                         break;
3014                 }
3015         }
3016
3017         if (rxflags && injected)
3018                 return;
3019
3020         if (!injected)
3021                 handle_frame(drv, buf + iter.max_length,
3022                              len - iter.max_length, &hfi);
3023         else
3024                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3025                                    len - iter.max_length, !failed);
3026 }
3027
3028
3029 /*
3030  * we post-process the filter code later and rewrite
3031  * this to the offset to the last instruction
3032  */
3033 #define PASS    0xFF
3034 #define FAIL    0xFE
3035
3036 static struct sock_filter msock_filter_insns[] = {
3037         /*
3038          * do a little-endian load of the radiotap length field
3039          */
3040         /* load lower byte into A */
3041         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3042         /* put it into X (== index register) */
3043         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3044         /* load upper byte into A */
3045         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3046         /* left-shift it by 8 */
3047         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3048         /* or with X */
3049         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3050         /* put result into X */
3051         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3052
3053         /*
3054          * Allow management frames through, this also gives us those
3055          * management frames that we sent ourselves with status
3056          */
3057         /* load the lower byte of the IEEE 802.11 frame control field */
3058         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3059         /* mask off frame type and version */
3060         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3061         /* accept frame if it's both 0, fall through otherwise */
3062         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3063
3064         /*
3065          * TODO: add a bit to radiotap RX flags that indicates
3066          * that the sending station is not associated, then
3067          * add a filter here that filters on our DA and that flag
3068          * to allow us to deauth frames to that bad station.
3069          *
3070          * Not a regression -- we didn't do it before either.
3071          */
3072
3073 #if 0
3074         /*
3075          * drop non-data frames, WDS frames
3076          */
3077         /* load the lower byte of the frame control field */
3078         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3079         /* mask off QoS bit */
3080         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3081         /* drop non-data frames */
3082         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3083         /* load the upper byte of the frame control field */
3084         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3085         /* mask off toDS/fromDS */
3086         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3087         /* drop WDS frames */
3088         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
3089 #endif
3090
3091         /*
3092          * add header length to index
3093          */
3094         /* load the lower byte of the frame control field */
3095         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3096         /* mask off QoS bit */
3097         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3098         /* right shift it by 6 to give 0 or 2 */
3099         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3100         /* add data frame header length */
3101         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3102         /* add index, was start of 802.11 header */
3103         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3104         /* move to index, now start of LL header */
3105         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3106
3107         /*
3108          * Accept empty data frames, we use those for
3109          * polling activity.
3110          */
3111         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3112         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3113
3114         /*
3115          * Accept EAPOL frames
3116          */
3117         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3118         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3119         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3120         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3121
3122         /* keep these last two statements or change the code below */
3123         /* return 0 == "DROP" */
3124         BPF_STMT(BPF_RET | BPF_K, 0),
3125         /* return ~0 == "keep all" */
3126         BPF_STMT(BPF_RET | BPF_K, ~0),
3127 };
3128
3129 static struct sock_fprog msock_filter = {
3130         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3131         .filter = msock_filter_insns,
3132 };
3133
3134
3135 static int add_monitor_filter(int s)
3136 {
3137         int idx;
3138
3139         /* rewrite all PASS/FAIL jump offsets */
3140         for (idx = 0; idx < msock_filter.len; idx++) {
3141                 struct sock_filter *insn = &msock_filter_insns[idx];
3142
3143                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3144                         if (insn->code == (BPF_JMP|BPF_JA)) {
3145                                 if (insn->k == PASS)
3146                                         insn->k = msock_filter.len - idx - 2;
3147                                 else if (insn->k == FAIL)
3148                                         insn->k = msock_filter.len - idx - 3;
3149                         }
3150
3151                         if (insn->jt == PASS)
3152                                 insn->jt = msock_filter.len - idx - 2;
3153                         else if (insn->jt == FAIL)
3154                                 insn->jt = msock_filter.len - idx - 3;
3155
3156                         if (insn->jf == PASS)
3157                                 insn->jf = msock_filter.len - idx - 2;
3158                         else if (insn->jf == FAIL)
3159                                 insn->jf = msock_filter.len - idx - 3;
3160                 }
3161         }
3162
3163         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3164                        &msock_filter, sizeof(msock_filter))) {
3165                 perror("SO_ATTACH_FILTER");
3166                 return -1;
3167         }
3168
3169         return 0;
3170 }
3171
3172
3173 static void nl80211_remove_monitor_interface(
3174         struct wpa_driver_nl80211_data *drv)
3175 {
3176         if (drv->monitor_ifidx >= 0) {
3177                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3178                 drv->monitor_ifidx = -1;
3179         }
3180 }
3181
3182
3183 static int
3184 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3185 {
3186         char buf[IFNAMSIZ];
3187         struct sockaddr_ll ll;
3188         int optval;
3189         socklen_t optlen;
3190
3191         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3192         buf[IFNAMSIZ - 1] = '\0';
3193
3194         drv->monitor_ifidx =
3195                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
3196
3197         if (drv->monitor_ifidx < 0)
3198                 return -1;
3199
3200         if (hostapd_set_iface_flags(drv, buf, 1))
3201                 goto error;
3202
3203         memset(&ll, 0, sizeof(ll));
3204         ll.sll_family = AF_PACKET;
3205         ll.sll_ifindex = drv->monitor_ifidx;
3206         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3207         if (drv->monitor_sock < 0) {
3208                 perror("socket[PF_PACKET,SOCK_RAW]");
3209                 goto error;
3210         }
3211
3212         if (add_monitor_filter(drv->monitor_sock)) {
3213                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3214                            "interface; do filtering in user space");
3215                 /* This works, but will cost in performance. */
3216         }
3217
3218         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3219                 perror("monitor socket bind");
3220                 goto error;
3221         }
3222
3223         optlen = sizeof(optval);
3224         optval = 20;
3225         if (setsockopt
3226             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3227                 perror("Failed to set socket priority");
3228                 goto error;
3229         }
3230
3231         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3232                                      drv, NULL)) {
3233                 printf("Could not register monitor read socket\n");
3234                 goto error;
3235         }
3236
3237         return 0;
3238  error:
3239         nl80211_remove_monitor_interface(drv);
3240         return -1;
3241 }
3242
3243
3244 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3245
3246 static int wpa_driver_nl80211_hapd_send_eapol(
3247         void *priv, const u8 *addr, const u8 *data,
3248         size_t data_len, int encrypt, const u8 *own_addr)
3249 {
3250         struct wpa_driver_nl80211_data *drv = priv;
3251         struct ieee80211_hdr *hdr;
3252         size_t len;
3253         u8 *pos;
3254         int res;
3255 #if 0 /* FIX */
3256         int qos = sta->flags & WLAN_STA_WME;
3257 #else
3258         int qos = 0;
3259 #endif
3260
3261         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3262                 data_len;
3263         hdr = os_zalloc(len);
3264         if (hdr == NULL) {
3265                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3266                        (unsigned long) len);
3267                 return -1;
3268         }
3269
3270         hdr->frame_control =
3271                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3272         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3273         if (encrypt)
3274                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3275 #if 0 /* To be enabled if qos determination is added above */
3276         if (qos) {
3277                 hdr->frame_control |=
3278                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3279         }
3280 #endif
3281
3282         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3283         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3284         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3285         pos = (u8 *) (hdr + 1);
3286
3287 #if 0 /* To be enabled if qos determination is added above */
3288         if (qos) {
3289                 /* add an empty QoS header if needed */
3290                 pos[0] = 0;
3291                 pos[1] = 0;
3292                 pos += 2;
3293         }
3294 #endif
3295
3296         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3297         pos += sizeof(rfc1042_header);
3298         WPA_PUT_BE16(pos, ETH_P_PAE);
3299         pos += 2;
3300         memcpy(pos, data, data_len);
3301
3302         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3303         if (res < 0) {
3304                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3305                            "failed: %d (%s)",
3306                            (unsigned long) len, errno, strerror(errno));
3307         }
3308         free(hdr);
3309
3310         return res;
3311 }
3312
3313
3314 static u32 sta_flags_nl80211(int flags)
3315 {
3316         u32 f = 0;
3317
3318         if (flags & WLAN_STA_AUTHORIZED)
3319                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3320         if (flags & WLAN_STA_WMM)
3321                 f |= BIT(NL80211_STA_FLAG_WME);
3322         if (flags & WLAN_STA_SHORT_PREAMBLE)
3323                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3324         if (flags & WLAN_STA_MFP)
3325                 f |= BIT(NL80211_STA_FLAG_MFP);
3326
3327         return f;
3328 }
3329
3330
3331 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3332                                             int total_flags, int flags_or,
3333                                             int flags_and)
3334 {
3335         struct wpa_driver_nl80211_data *drv = priv;
3336         struct nl_msg *msg, *flags = NULL;
3337         struct nl80211_sta_flag_update upd;
3338
3339         msg = nlmsg_alloc();
3340         if (!msg)
3341                 return -ENOMEM;
3342
3343         flags = nlmsg_alloc();
3344         if (!flags) {
3345                 nlmsg_free(msg);
3346                 return -ENOMEM;
3347         }
3348
3349         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3350                     0, NL80211_CMD_SET_STATION, 0);
3351
3352         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3353                     if_nametoindex(drv->ifname));
3354         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3355
3356         /*
3357          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3358          * can be removed eventually.
3359          */
3360         if (total_flags & WLAN_STA_AUTHORIZED)
3361                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3362
3363         if (total_flags & WLAN_STA_WMM)
3364                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3365
3366         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3367                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3368
3369         if (total_flags & WLAN_STA_MFP)
3370                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3371
3372         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3373                 goto nla_put_failure;
3374
3375         os_memset(&upd, 0, sizeof(upd));
3376         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3377         upd.set = sta_flags_nl80211(flags_or);
3378         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3379
3380         nlmsg_free(flags);
3381
3382         return send_and_recv_msgs(drv, msg, NULL, NULL);
3383  nla_put_failure:
3384         nlmsg_free(flags);
3385         return -ENOBUFS;
3386 }
3387
3388 #endif /* CONFIG_AP || HOSTAPD */
3389
3390 #ifdef CONFIG_AP
3391
3392 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3393                                  struct wpa_driver_associate_params *params)
3394 {
3395         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3396             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3397                 nl80211_remove_monitor_interface(drv);
3398                 return -1;
3399         }
3400
3401         /* TODO: setup monitor interface (and add code somewhere to remove this
3402          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3403
3404         return 0;
3405 }
3406 #endif /* CONFIG_AP */
3407
3408
3409 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3410 {
3411         struct nl_msg *msg;
3412         int ret = -1;
3413
3414         msg = nlmsg_alloc();
3415         if (!msg)
3416                 return -1;
3417
3418         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3419                     NL80211_CMD_LEAVE_IBSS, 0);
3420         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3421         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3422         msg = NULL;
3423         if (ret) {
3424                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3425                            "(%s)", ret, strerror(-ret));
3426                 goto nla_put_failure;
3427         }
3428
3429         ret = 0;
3430         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3431
3432 nla_put_failure:
3433         nlmsg_free(msg);
3434         return ret;
3435 }
3436
3437
3438 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3439                                    struct wpa_driver_associate_params *params)
3440 {
3441         struct nl_msg *msg;
3442         int ret = -1;
3443         int count = 0;
3444
3445         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3446
3447         if (wpa_driver_nl80211_set_mode(drv, params->mode)) {
3448                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3449                            "IBSS mode");
3450                 return -1;
3451         }
3452
3453 retry:
3454         msg = nlmsg_alloc();
3455         if (!msg)
3456                 return -1;
3457
3458         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3459                     NL80211_CMD_JOIN_IBSS, 0);
3460         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3461
3462         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3463                 goto nla_put_failure;
3464
3465         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3466                           params->ssid, params->ssid_len);
3467         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3468                 params->ssid);
3469         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3470         drv->ssid_len = params->ssid_len;
3471
3472         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3473         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3474
3475         ret = nl80211_set_conn_keys(params, msg);
3476         if (ret)
3477                 goto nla_put_failure;
3478
3479         if (params->wpa_ie) {
3480                 wpa_hexdump(MSG_DEBUG,
3481                             "  * Extra IEs for Beacon/Probe Response frames",
3482                             params->wpa_ie, params->wpa_ie_len);
3483                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3484                         params->wpa_ie);
3485         }
3486
3487         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3488         msg = NULL;
3489         if (ret) {
3490                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3491                            ret, strerror(-ret));
3492                 count++;
3493                 if (ret == -EALREADY && count == 1) {
3494                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3495                                    "forced leave");
3496                         nl80211_leave_ibss(drv);
3497                         nlmsg_free(msg);
3498                         goto retry;
3499                 }
3500
3501                 goto nla_put_failure;
3502         }
3503         ret = 0;
3504         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3505
3506 nla_put_failure:
3507         nlmsg_free(msg);
3508         return ret;
3509 }
3510
3511
3512 static int wpa_driver_nl80211_connect(
3513         struct wpa_driver_nl80211_data *drv,
3514         struct wpa_driver_associate_params *params)
3515 {
3516         struct nl_msg *msg;
3517         enum nl80211_auth_type type;
3518         int ret = 0;
3519
3520         msg = nlmsg_alloc();
3521         if (!msg)
3522                 return -1;
3523
3524         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3525         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3526                     NL80211_CMD_CONNECT, 0);
3527
3528         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3529         if (params->bssid) {
3530                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3531                            MAC2STR(params->bssid));
3532                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3533         }
3534         if (params->freq) {
3535                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3536                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3537         }
3538         if (params->ssid) {
3539                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3540                                   params->ssid, params->ssid_len);
3541                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3542                         params->ssid);
3543                 if (params->ssid_len > sizeof(drv->ssid))
3544                         goto nla_put_failure;
3545                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3546                 drv->ssid_len = params->ssid_len;
3547         }
3548         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3549         if (params->wpa_ie)
3550                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3551                         params->wpa_ie);
3552
3553         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3554                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3555         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3556                 type = NL80211_AUTHTYPE_SHARED_KEY;
3557         else if (params->auth_alg & AUTH_ALG_LEAP)
3558                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3559         else if (params->auth_alg & AUTH_ALG_FT)
3560                 type = NL80211_AUTHTYPE_FT;
3561         else
3562                 goto nla_put_failure;
3563
3564         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3565         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3566
3567         if (params->wpa_ie && params->wpa_ie_len) {
3568                 enum nl80211_wpa_versions ver;
3569
3570                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3571                         ver = NL80211_WPA_VERSION_2;
3572                 else
3573                         ver = NL80211_WPA_VERSION_1;
3574
3575                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3576                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3577         }
3578
3579         if (params->pairwise_suite != CIPHER_NONE) {
3580                 int cipher;
3581
3582                 switch (params->pairwise_suite) {
3583                 case CIPHER_WEP40:
3584                         cipher = WLAN_CIPHER_SUITE_WEP40;
3585                         break;
3586                 case CIPHER_WEP104:
3587                         cipher = WLAN_CIPHER_SUITE_WEP104;
3588                         break;
3589                 case CIPHER_CCMP:
3590                         cipher = WLAN_CIPHER_SUITE_CCMP;
3591                         break;
3592                 case CIPHER_TKIP:
3593                 default:
3594                         cipher = WLAN_CIPHER_SUITE_TKIP;
3595                         break;
3596                 }
3597                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3598         }
3599
3600         if (params->group_suite != CIPHER_NONE) {
3601                 int cipher;
3602
3603                 switch (params->group_suite) {
3604                 case CIPHER_WEP40:
3605                         cipher = WLAN_CIPHER_SUITE_WEP40;
3606                         break;
3607                 case CIPHER_WEP104:
3608                         cipher = WLAN_CIPHER_SUITE_WEP104;
3609                         break;
3610                 case CIPHER_CCMP:
3611                         cipher = WLAN_CIPHER_SUITE_CCMP;
3612                         break;
3613                 case CIPHER_TKIP:
3614                 default:
3615                         cipher = WLAN_CIPHER_SUITE_TKIP;
3616                         break;
3617                 }
3618                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3619         }
3620
3621         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3622             params->key_mgmt_suite == KEY_MGMT_PSK) {
3623                 int mgmt = WLAN_AKM_SUITE_PSK;
3624
3625                 switch (params->key_mgmt_suite) {
3626                 case KEY_MGMT_802_1X:
3627                         mgmt = WLAN_AKM_SUITE_8021X;
3628                         break;
3629                 case KEY_MGMT_PSK:
3630                 default:
3631                         mgmt = WLAN_AKM_SUITE_PSK;
3632                         break;
3633                 }
3634                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3635         }
3636
3637         ret = nl80211_set_conn_keys(params, msg);
3638         if (ret)
3639                 goto nla_put_failure;
3640
3641         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3642         msg = NULL;
3643         if (ret) {
3644                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3645                            "(%s)", ret, strerror(-ret));
3646                 goto nla_put_failure;
3647         }
3648         ret = 0;
3649         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3650
3651 nla_put_failure:
3652         nlmsg_free(msg);
3653         return ret;
3654
3655 }
3656
3657
3658 static int wpa_driver_nl80211_associate(
3659         void *priv, struct wpa_driver_associate_params *params)
3660 {
3661         struct wpa_driver_nl80211_data *drv = priv;
3662         int ret = -1;
3663         struct nl_msg *msg;
3664
3665 #ifdef CONFIG_AP
3666         if (params->mode == IEEE80211_MODE_AP)
3667                 return wpa_driver_nl80211_ap(drv, params);
3668 #endif /* CONFIG_AP */
3669
3670         if (params->mode == IEEE80211_MODE_IBSS)
3671                 return wpa_driver_nl80211_ibss(drv, params);
3672
3673         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3674                 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3675                         return -1;
3676                 return wpa_driver_nl80211_connect(drv, params);
3677         }
3678
3679         drv->associated = 0;
3680
3681         msg = nlmsg_alloc();
3682         if (!msg)
3683                 return -1;
3684
3685         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3686                    drv->ifindex);
3687         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3688                     NL80211_CMD_ASSOCIATE, 0);
3689
3690         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3691         if (params->bssid) {
3692                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3693                            MAC2STR(params->bssid));
3694                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3695         }
3696         if (params->freq) {
3697                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3698                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3699         }
3700         if (params->ssid) {
3701                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3702                                   params->ssid, params->ssid_len);
3703                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3704                         params->ssid);
3705                 if (params->ssid_len > sizeof(drv->ssid))
3706                         goto nla_put_failure;
3707                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3708                 drv->ssid_len = params->ssid_len;
3709         }
3710         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3711         if (params->wpa_ie)
3712                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3713                         params->wpa_ie);
3714
3715 #ifdef CONFIG_IEEE80211W
3716         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3717                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3718 #endif /* CONFIG_IEEE80211W */
3719
3720         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3721
3722         if (params->prev_bssid) {
3723                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3724                            MAC2STR(params->prev_bssid));
3725                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3726                         params->prev_bssid);
3727         }
3728
3729         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3730         msg = NULL;
3731         if (ret) {
3732                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3733                            "(%s)", ret, strerror(-ret));
3734                 goto nla_put_failure;
3735         }
3736         ret = 0;
3737         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3738                    "successfully");
3739
3740 nla_put_failure:
3741         nlmsg_free(msg);
3742         return ret;
3743 }
3744
3745
3746 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3747                             int ifindex, int mode)
3748 {
3749         struct nl_msg *msg;
3750         int ret = -ENOBUFS;
3751
3752         msg = nlmsg_alloc();
3753         if (!msg)
3754                 return -ENOMEM;
3755
3756         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3757                     0, NL80211_CMD_SET_INTERFACE, 0);
3758         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3759         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3760
3761         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3762         if (!ret)
3763                 return 0;
3764 nla_put_failure:
3765         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3766                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3767         return ret;
3768 }
3769
3770
3771 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3772 {
3773         struct wpa_driver_nl80211_data *drv = priv;
3774         int ret = -1;
3775         int nlmode;
3776
3777         switch (mode) {
3778         case 0:
3779                 nlmode = NL80211_IFTYPE_STATION;
3780                 break;
3781         case 1:
3782                 nlmode = NL80211_IFTYPE_ADHOC;
3783                 break;
3784         case 2:
3785                 nlmode = NL80211_IFTYPE_AP;
3786                 break;
3787         default:
3788                 return -1;
3789         }
3790
3791         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3792                 drv->nlmode = nlmode;
3793                 ret = 0;
3794                 goto done;
3795         }
3796
3797         if (nlmode == drv->nlmode) {
3798                 ret = 0;
3799                 goto done; /* Already in the requested mode */
3800         }
3801
3802         /* mac80211 doesn't allow mode changes while the device is up, so
3803          * take the device down, try to set the mode again, and bring the
3804          * device back up.
3805          */
3806         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3807                 /* Try to set the mode again while the interface is down */
3808                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3809                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3810                         ret = -1;
3811         }
3812
3813         if (!ret)
3814                 drv->nlmode = nlmode;
3815
3816 done:
3817 #if defined(CONFIG_AP) || defined(HOSTAPD)
3818         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3819                 /* Setup additional AP mode functionality if needed */
3820                 if (drv->monitor_ifidx < 0 &&
3821                     nl80211_create_monitor_interface(drv))
3822                         return -1;
3823         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3824                 /* Remove additional AP mode functionality */
3825                 nl80211_remove_monitor_interface(drv);
3826         }
3827 #endif /* CONFIG_AP || HOSTAPD */
3828
3829         return ret;
3830 }
3831
3832
3833 static int wpa_driver_nl80211_get_capa(void *priv,
3834                                        struct wpa_driver_capa *capa)
3835 {
3836         struct wpa_driver_nl80211_data *drv = priv;
3837         if (!drv->has_capability)
3838                 return -1;
3839         os_memcpy(capa, &drv->capa, sizeof(*capa));
3840         return 0;
3841 }
3842
3843
3844 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3845 {
3846         struct wpa_driver_nl80211_data *drv = priv;
3847
3848         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3849                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3850         drv->operstate = state;
3851         return wpa_driver_nl80211_send_oper_ifla(
3852                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3853 }
3854
3855
3856 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3857 {
3858         struct wpa_driver_nl80211_data *drv = priv;
3859         struct nl_msg *msg;
3860         struct nl80211_sta_flag_update upd;
3861
3862         msg = nlmsg_alloc();
3863         if (!msg)
3864                 return -ENOMEM;
3865
3866         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3867                     0, NL80211_CMD_SET_STATION, 0);
3868
3869         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3870                     if_nametoindex(drv->ifname));
3871         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3872
3873         os_memset(&upd, 0, sizeof(upd));
3874         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3875         if (authorized)
3876                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3877         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3878
3879         return send_and_recv_msgs(drv, msg, NULL, NULL);
3880  nla_put_failure:
3881         return -ENOBUFS;
3882 }
3883
3884
3885 #ifdef HOSTAPD
3886
3887 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3888                                  int ifindex)
3889 {
3890         struct i802_bss *bss = &drv->bss;
3891         while (bss) {
3892                 if (ifindex == bss->ifindex)
3893                         return bss;
3894                 bss = bss->next;
3895         }
3896         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3897         return NULL;
3898 }
3899
3900
3901 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3902 {
3903         int i;
3904         int *old;
3905
3906         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3907                    ifidx);
3908         for (i = 0; i < drv->num_if_indices; i++) {
3909                 if (drv->if_indices[i] == 0) {
3910                         drv->if_indices[i] = ifidx;
3911                         return;
3912                 }
3913         }
3914
3915         if (drv->if_indices != drv->default_if_indices)
3916                 old = drv->if_indices;
3917         else
3918                 old = NULL;
3919
3920         drv->if_indices = realloc(old,
3921                                   sizeof(int) * (drv->num_if_indices + 1));
3922         if (!drv->if_indices) {
3923                 if (!old)
3924                         drv->if_indices = drv->default_if_indices;
3925                 else
3926                         drv->if_indices = old;
3927                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3928                            "interfaces");
3929                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3930                 return;
3931         }
3932         drv->if_indices[drv->num_if_indices] = ifidx;
3933         drv->num_if_indices++;
3934 }
3935
3936
3937 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3938 {
3939         int i;
3940
3941         for (i = 0; i < drv->num_if_indices; i++) {
3942                 if (drv->if_indices[i] == ifidx) {
3943                         drv->if_indices[i] = 0;
3944                         break;
3945                 }
3946         }
3947 }
3948
3949
3950 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3951 {
3952         int i;
3953
3954         for (i = 0; i < drv->num_if_indices; i++)
3955                 if (drv->if_indices[i] == ifidx)
3956                         return 1;
3957
3958         return 0;
3959 }
3960
3961
3962 static inline int min_int(int a, int b)
3963 {
3964         if (a < b)
3965                 return a;
3966         return b;
3967 }
3968
3969
3970 static int get_key_handler(struct nl_msg *msg, void *arg)
3971 {
3972         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3973         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3974
3975         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3976                   genlmsg_attrlen(gnlh, 0), NULL);
3977
3978         /*
3979          * TODO: validate the key index and mac address!
3980          * Otherwise, there's a race condition as soon as
3981          * the kernel starts sending key notifications.
3982          */
3983
3984         if (tb[NL80211_ATTR_KEY_SEQ])
3985                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3986                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3987         return NL_SKIP;
3988 }
3989
3990
3991 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3992                            int idx, u8 *seq)
3993 {
3994         struct wpa_driver_nl80211_data *drv = priv;
3995         struct nl_msg *msg;
3996
3997         msg = nlmsg_alloc();
3998         if (!msg)
3999                 return -ENOMEM;
4000
4001         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4002                     0, NL80211_CMD_GET_KEY, 0);
4003
4004         if (addr)
4005                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4006         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4007         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4008
4009         memset(seq, 0, 6);
4010
4011         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4012  nla_put_failure:
4013         return -ENOBUFS;
4014 }
4015
4016
4017 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4018                               int mode)
4019 {
4020         struct wpa_driver_nl80211_data *drv = priv;
4021         struct nl_msg *msg;
4022         u8 rates[NL80211_MAX_SUPP_RATES];
4023         u8 rates_len = 0;
4024         int i;
4025
4026         msg = nlmsg_alloc();
4027         if (!msg)
4028                 return -ENOMEM;
4029
4030         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4031                     NL80211_CMD_SET_BSS, 0);
4032
4033         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4034                 rates[rates_len++] = basic_rates[i] / 5;
4035
4036         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4037
4038         /* TODO: multi-BSS support */
4039         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4040
4041         return send_and_recv_msgs(drv, msg, NULL, NULL);
4042  nla_put_failure:
4043         return -ENOBUFS;
4044 }
4045
4046
4047 /* Set kernel driver on given frequency (MHz) */
4048 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4049 {
4050         struct wpa_driver_nl80211_data *drv = priv;
4051         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4052                                            freq->sec_channel_offset);
4053 }
4054
4055
4056 static int i802_set_rts(void *priv, int rts)
4057 {
4058         struct wpa_driver_nl80211_data *drv = priv;
4059         struct nl_msg *msg;
4060         int ret = -ENOBUFS;
4061         u32 val;
4062
4063         msg = nlmsg_alloc();
4064         if (!msg)
4065                 return -ENOMEM;
4066
4067         if (rts >= 2347)
4068                 val = (u32) -1;
4069         else
4070                 val = rts;
4071
4072         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4073                     0, NL80211_CMD_SET_WIPHY, 0);
4074         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4075         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4076
4077         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4078         if (!ret)
4079                 return 0;
4080 nla_put_failure:
4081         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4082                    "%d (%s)", rts, ret, strerror(-ret));
4083         return ret;
4084 }
4085
4086
4087 static int i802_set_frag(void *priv, int frag)
4088 {
4089         struct wpa_driver_nl80211_data *drv = priv;
4090         struct nl_msg *msg;
4091         int ret = -ENOBUFS;
4092         u32 val;
4093
4094         msg = nlmsg_alloc();
4095         if (!msg)
4096                 return -ENOMEM;
4097
4098         if (frag >= 2346)
4099                 val = (u32) -1;
4100         else
4101                 val = frag;
4102
4103         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4104                     0, NL80211_CMD_SET_WIPHY, 0);
4105         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4106         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4107
4108         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4109         if (!ret)
4110                 return 0;
4111 nla_put_failure:
4112         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4113                    "%d: %d (%s)", frag, ret, strerror(-ret));
4114         return ret;
4115 }
4116
4117
4118 static int i802_flush(void *priv)
4119 {
4120         struct wpa_driver_nl80211_data *drv = priv;
4121         struct nl_msg *msg;
4122
4123         msg = nlmsg_alloc();
4124         if (!msg)
4125                 return -1;
4126
4127         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4128                     0, NL80211_CMD_DEL_STATION, 0);
4129
4130         /*
4131          * XXX: FIX! this needs to flush all VLANs too
4132          */
4133         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4134                     if_nametoindex(drv->ifname));
4135
4136         return send_and_recv_msgs(drv, msg, NULL, NULL);
4137  nla_put_failure:
4138         return -ENOBUFS;
4139 }
4140
4141
4142 static int get_sta_handler(struct nl_msg *msg, void *arg)
4143 {
4144         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4145         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4146         struct hostap_sta_driver_data *data = arg;
4147         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4148         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4149                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4150                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4151                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4152                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4153                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4154         };
4155
4156         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4157                   genlmsg_attrlen(gnlh, 0), NULL);
4158
4159         /*
4160          * TODO: validate the interface and mac address!
4161          * Otherwise, there's a race condition as soon as
4162          * the kernel starts sending station notifications.
4163          */
4164
4165         if (!tb[NL80211_ATTR_STA_INFO]) {
4166                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4167                 return NL_SKIP;
4168         }
4169         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4170                              tb[NL80211_ATTR_STA_INFO],
4171                              stats_policy)) {
4172                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4173                 return NL_SKIP;
4174         }
4175
4176         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4177                 data->inactive_msec =
4178                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4179         if (stats[NL80211_STA_INFO_RX_BYTES])
4180                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4181         if (stats[NL80211_STA_INFO_TX_BYTES])
4182                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4183         if (stats[NL80211_STA_INFO_RX_PACKETS])
4184                 data->rx_packets =
4185                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4186         if (stats[NL80211_STA_INFO_TX_PACKETS])
4187                 data->tx_packets =
4188                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4189
4190         return NL_SKIP;
4191 }
4192
4193 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4194                               const u8 *addr)
4195 {
4196         struct wpa_driver_nl80211_data *drv = priv;
4197         struct nl_msg *msg;
4198
4199         os_memset(data, 0, sizeof(*data));
4200         msg = nlmsg_alloc();
4201         if (!msg)
4202                 return -ENOMEM;
4203
4204         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4205                     0, NL80211_CMD_GET_STATION, 0);
4206
4207         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4208         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4209
4210         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4211  nla_put_failure:
4212         return -ENOBUFS;
4213 }
4214
4215
4216 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4217                                     int cw_min, int cw_max, int burst_time)
4218 {
4219         struct wpa_driver_nl80211_data *drv = priv;
4220         struct nl_msg *msg;
4221         struct nlattr *txq, *params;
4222
4223         msg = nlmsg_alloc();
4224         if (!msg)
4225                 return -1;
4226
4227         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4228                     0, NL80211_CMD_SET_WIPHY, 0);
4229
4230         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4231
4232         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4233         if (!txq)
4234                 goto nla_put_failure;
4235
4236         /* We are only sending parameters for a single TXQ at a time */
4237         params = nla_nest_start(msg, 1);
4238         if (!params)
4239                 goto nla_put_failure;
4240
4241         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4242         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4243          * 32 usec, so need to convert the value here. */
4244         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4245         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4246         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4247         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4248
4249         nla_nest_end(msg, params);
4250
4251         nla_nest_end(msg, txq);
4252
4253         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4254                 return 0;
4255  nla_put_failure:
4256         return -1;
4257 }
4258
4259
4260 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
4261 {
4262         struct wpa_driver_nl80211_data *drv = priv;
4263         int ifidx;
4264         struct i802_bss *bss;
4265
4266         bss = os_zalloc(sizeof(*bss));
4267         if (bss == NULL)
4268                 return -1;
4269
4270         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
4271         if (ifidx < 0) {
4272                 os_free(bss);
4273                 return -1;
4274         }
4275         bss->ifindex = ifidx;
4276         if (hostapd_set_iface_flags(priv, ifname, 1)) {
4277                 nl80211_remove_iface(priv, ifidx);
4278                 os_free(bss);
4279                 return -1;
4280         }
4281         bss->next = drv->bss.next;
4282         drv->bss.next = bss;
4283         return 0;
4284 }
4285
4286
4287 static int i802_bss_remove(void *priv, const char *ifname)
4288 {
4289         struct wpa_driver_nl80211_data *drv = priv;
4290         struct i802_bss *bss, *prev;
4291         int ifindex = if_nametoindex(ifname);
4292         nl80211_remove_iface(priv, ifindex);
4293         prev = &drv->bss;
4294         bss = drv->bss.next;
4295         while (bss) {
4296                 if (ifindex == bss->ifindex) {
4297                         prev->next = bss->next;
4298                         os_free(bss);
4299                         break;
4300                 }
4301                 prev = bss;
4302                 bss = bss->next;
4303         }
4304         return 0;
4305 }
4306
4307
4308 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4309 {
4310         struct wpa_driver_nl80211_data *drv = priv;
4311         struct nl_msg *msg;
4312
4313         msg = nlmsg_alloc();
4314         if (!msg)
4315                 return -ENOMEM;
4316
4317         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4318                     NL80211_CMD_SET_BSS, 0);
4319
4320         if (cts >= 0)
4321                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4322         if (preamble >= 0)
4323                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4324         if (slot >= 0)
4325                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4326
4327         /* TODO: multi-BSS support */
4328         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4329
4330         return send_and_recv_msgs(drv, msg, NULL, NULL);
4331  nla_put_failure:
4332         return -ENOBUFS;
4333 }
4334
4335
4336 static int i802_set_cts_protect(void *priv, int value)
4337 {
4338         return i802_set_bss(priv, value, -1, -1);
4339 }
4340
4341
4342 static int i802_set_preamble(void *priv, int value)
4343 {
4344         return i802_set_bss(priv, -1, value, -1);
4345 }
4346
4347
4348 static int i802_set_short_slot_time(void *priv, int value)
4349 {
4350         return i802_set_bss(priv, -1, -1, value);
4351 }
4352
4353
4354 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
4355 {
4356         switch (type) {
4357         case HOSTAPD_IF_VLAN:
4358                 return NL80211_IFTYPE_AP_VLAN;
4359         }
4360         return -1;
4361 }
4362
4363
4364 static int i802_if_add(const char *iface, void *priv,
4365                        enum hostapd_driver_if_type type, char *ifname,
4366                        const u8 *addr)
4367 {
4368         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
4369                 return -1;
4370         return 0;
4371 }
4372
4373
4374 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
4375                           const char *ifname, const u8 *addr)
4376 {
4377         nl80211_remove_iface(priv, if_nametoindex(ifname));
4378         return 0;
4379 }
4380
4381
4382 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4383                              const char *ifname, int vlan_id)
4384 {
4385         struct wpa_driver_nl80211_data *drv = priv;
4386         struct nl_msg *msg;
4387
4388         msg = nlmsg_alloc();
4389         if (!msg)
4390                 return -ENOMEM;
4391
4392         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4393                     0, NL80211_CMD_SET_STATION, 0);
4394
4395         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4396                     if_nametoindex(drv->ifname));
4397         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4398         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4399                     if_nametoindex(ifname));
4400
4401         return send_and_recv_msgs(drv, msg, NULL, NULL);
4402  nla_put_failure:
4403         return -ENOBUFS;
4404 }
4405
4406
4407 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4408 {
4409         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4410         struct sockaddr_ll lladdr;
4411         unsigned char buf[3000];
4412         int len;
4413         socklen_t fromlen = sizeof(lladdr);
4414
4415         len = recvfrom(sock, buf, sizeof(buf), 0,
4416                        (struct sockaddr *)&lladdr, &fromlen);
4417         if (len < 0) {
4418                 perror("recv");
4419                 return;
4420         }
4421
4422         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4423                 void *ctx;
4424                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4425                 if (!ctx)
4426                         return;
4427                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4428         }
4429 }
4430
4431
4432 static int i802_get_inact_sec(void *priv, const u8 *addr)
4433 {
4434         struct hostap_sta_driver_data data;
4435         int ret;
4436
4437         data.inactive_msec = (unsigned long) -1;
4438         ret = i802_read_sta_data(priv, &data, addr);
4439         if (ret || data.inactive_msec == (unsigned long) -1)
4440                 return -1;
4441         return data.inactive_msec / 1000;
4442 }
4443
4444
4445 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4446 {
4447 #if 0
4448         /* TODO */
4449 #endif
4450         return 0;
4451 }
4452
4453
4454 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4455                            int reason)
4456 {
4457         struct wpa_driver_nl80211_data *drv = priv;
4458         struct ieee80211_mgmt mgmt;
4459
4460         memset(&mgmt, 0, sizeof(mgmt));
4461         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4462                                           WLAN_FC_STYPE_DEAUTH);
4463         memcpy(mgmt.da, addr, ETH_ALEN);
4464         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4465         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4466         mgmt.u.deauth.reason_code = host_to_le16(reason);
4467         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4468                                             IEEE80211_HDRLEN +
4469                                             sizeof(mgmt.u.deauth));
4470 }
4471
4472
4473 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4474                              int reason)
4475 {
4476         struct wpa_driver_nl80211_data *drv = priv;
4477         struct ieee80211_mgmt mgmt;
4478
4479         memset(&mgmt, 0, sizeof(mgmt));
4480         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4481                                           WLAN_FC_STYPE_DISASSOC);
4482         memcpy(mgmt.da, addr, ETH_ALEN);
4483         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4484         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4485         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4486         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4487                                             IEEE80211_HDRLEN +
4488                                             sizeof(mgmt.u.disassoc));
4489 }
4490
4491
4492 static void *i802_init(struct hostapd_data *hapd,
4493                        struct wpa_init_params *params)
4494 {
4495         struct wpa_driver_nl80211_data *drv;
4496         size_t i;
4497
4498         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4499         if (drv == NULL)
4500                 return NULL;
4501
4502         drv->bss.ifindex = drv->ifindex;
4503
4504         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4505         drv->if_indices = drv->default_if_indices;
4506         for (i = 0; i < params->num_bridge; i++) {
4507                 if (params->bridge[i])
4508                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4509         }
4510
4511         /* start listening for EAPOL on the default AP interface */
4512         add_ifidx(drv, drv->ifindex);
4513
4514         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4515                 goto failed;
4516
4517         if (params->bssid) {
4518                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4519                         goto failed;
4520         }
4521
4522         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
4523                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4524                            "into AP mode", drv->ifname);
4525                 goto failed;
4526         }
4527
4528         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4529                 goto failed;
4530
4531         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4532         if (drv->eapol_sock < 0) {
4533                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4534                 goto failed;
4535         }
4536
4537         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4538         {
4539                 printf("Could not register read socket for eapol\n");
4540                 goto failed;
4541         }
4542
4543         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4544                 goto failed;
4545
4546         return drv;
4547
4548 failed:
4549         nl80211_remove_monitor_interface(drv);
4550         if (drv->ioctl_sock >= 0)
4551                 close(drv->ioctl_sock);
4552
4553         genl_family_put(drv->nl80211);
4554         nl_cache_free(drv->nl_cache);
4555         nl_handle_destroy(drv->nl_handle);
4556         nl_cb_put(drv->nl_cb);
4557
4558         os_free(drv);
4559         return NULL;
4560 }
4561
4562
4563 static void i802_deinit(void *priv)
4564 {
4565         wpa_driver_nl80211_deinit(priv);
4566 }
4567
4568 #endif /* HOSTAPD */
4569
4570
4571 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4572         .name = "nl80211",
4573         .desc = "Linux nl80211/cfg80211",
4574         .get_bssid = wpa_driver_nl80211_get_bssid,
4575         .get_ssid = wpa_driver_nl80211_get_ssid,
4576         .set_key = wpa_driver_nl80211_set_key,
4577         .scan2 = wpa_driver_nl80211_scan,
4578         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4579         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4580         .disassociate = wpa_driver_nl80211_disassociate,
4581         .authenticate = wpa_driver_nl80211_authenticate,
4582         .associate = wpa_driver_nl80211_associate,
4583         .init = wpa_driver_nl80211_init,
4584         .deinit = wpa_driver_nl80211_deinit,
4585         .get_capa = wpa_driver_nl80211_get_capa,
4586         .set_operstate = wpa_driver_nl80211_set_operstate,
4587         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4588         .set_country = wpa_driver_nl80211_set_country,
4589         .set_beacon = wpa_driver_nl80211_set_beacon,
4590 #if defined(CONFIG_AP) || defined(HOSTAPD)
4591         .send_mlme = wpa_driver_nl80211_send_mlme,
4592         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4593         .sta_add = wpa_driver_nl80211_sta_add,
4594         .sta_remove = wpa_driver_nl80211_sta_remove,
4595         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4596         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4597 #endif /* CONFIG_AP || HOSTAPD */
4598 #ifdef HOSTAPD
4599         .hapd_init = i802_init,
4600         .hapd_deinit = i802_deinit,
4601         .get_seqnum = i802_get_seqnum,
4602         .flush = i802_flush,
4603         .read_sta_data = i802_read_sta_data,
4604         .sta_deauth = i802_sta_deauth,
4605         .sta_disassoc = i802_sta_disassoc,
4606         .get_inact_sec = i802_get_inact_sec,
4607         .sta_clear_stats = i802_sta_clear_stats,
4608         .set_freq = i802_set_freq,
4609         .set_rts = i802_set_rts,
4610         .set_frag = i802_set_frag,
4611         .set_rate_sets = i802_set_rate_sets,
4612         .set_cts_protect = i802_set_cts_protect,
4613         .set_preamble = i802_set_preamble,
4614         .set_short_slot_time = i802_set_short_slot_time,
4615         .set_tx_queue_params = i802_set_tx_queue_params,
4616         .bss_add = i802_bss_add,
4617         .bss_remove = i802_bss_remove,
4618         .if_add = i802_if_add,
4619         .if_remove = i802_if_remove,
4620         .set_sta_vlan = i802_set_sta_vlan,
4621 #endif /* HOSTAPD */
4622 };