src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if_arp.h>
  22 #include <net/if.h>
  23 #include <netlink/genl/genl.h>
  24 #include <netlink/genl/family.h>
  25 #include <netlink/genl/ctrl.h>
  26 #include "nl80211_copy.h"
  27 #ifndef NO_WEXT
  28 #include "wireless_copy.h"
  29 #endif /* NO_WEXT */
  30
  31 #include "common.h"
  32 #include "driver.h"
  33 #include "eloop.h"
  34 #include "ieee802_11_defs.h"
  35
  36 #if defined(CONFIG_AP) || defined(HOSTAPD)
  37 #include <netpacket/packet.h>
  38 #include <linux/filter.h>
  39 #include "radiotap.h"
  40 #include "radiotap_iter.h"
  41
  42 #include "../../hostapd/hostapd_defs.h"
  43 #include "../../hostapd/sta_flags.h"
  44 #endif /* CONFIG_AP || HOSTAPD */
  45
  46 #ifdef HOSTAPD
  47 #include "ieee802_11_common.h"
  48 #endif /* HOSTAPD */
  49
  50 #ifdef CONFIG_LIBNL20
  51 /* libnl 2.0 compatibility code */
  52 #define nl_handle nl_sock
  53 #define nl_handle_alloc_cb nl_socket_alloc_cb
  54 #define nl_handle_destroy nl_socket_free
  55 #endif /* CONFIG_LIBNL20 */
  56
  57
  58 #ifndef IFF_LOWER_UP
  59 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  60 #endif
  61 #ifndef IFF_DORMANT
  62 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  63 #endif
  64
  65 #ifndef IF_OPER_DORMANT
  66 #define IF_OPER_DORMANT 5
  67 #endif
  68 #ifndef IF_OPER_UP
  69 #define IF_OPER_UP 6
  70 #endif
  71
  72 struct i802_bss {
  73         struct i802_bss *next;
  74         int ifindex;
  75         unsigned int beacon_set:1;
  76 };
  77
  78 struct wpa_driver_nl80211_data {
  79         void *ctx;
  80         int link_event_sock;
  81         int ioctl_sock; /* socket for ioctl() use */
  82         char ifname[IFNAMSIZ + 1];
  83         int ifindex;
  84         int if_removed;
  85         struct wpa_driver_capa capa;
  86         int has_capability;
  87
  88         int operstate;
  89
  90         int scan_complete_events;
  91
  92         struct nl_handle *nl_handle;
  93         struct nl_handle *nl_handle_event;
  94         struct nl_cache *nl_cache;
  95         struct nl_cache *nl_cache_event;
  96         struct nl_cb *nl_cb;
  97         struct genl_family *nl80211;
  98
  99         u8 bssid[ETH_ALEN];
 100         int associated;
 101         u8 ssid[32];
 102         size_t ssid_len;
 103         int nlmode;
 104         int ap_scan_as_station;
 105
 106         int beacon_int;
 107         int monitor_sock;
 108         int monitor_ifidx;
 109
 110 #ifdef CONFIG_AP
 111         unsigned int beacon_set:1;
 112 #endif /* CONFIG_AP */
 113
 114 #ifdef HOSTAPD
 115         int eapol_sock; /* socket for EAPOL frames */
 116
 117         int default_if_indices[16];
 118         int *if_indices;
 119         int num_if_indices;
 120
 121         struct i802_bss bss;
 122
 123         int last_freq;
 124         int last_freq_ht;
 125 #endif /* HOSTAPD */
 126 };
 127
 128
 129 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 130                                             void *timeout_ctx);
 131 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 132 static int
 133 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 134
 135 #if defined(CONFIG_AP) || defined(HOSTAPD)
 136 static void nl80211_remove_monitor_interface(
 137         struct wpa_driver_nl80211_data *drv);
 138 #endif /* CONFIG_AP || HOSTAPD */
 139
 140 #ifdef CONFIG_AP
 141 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 142                                  int ifidx);
 143 #endif /* CONFIG_AP */
 144
 145 #ifdef HOSTAPD
 146 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 147 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 148 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 149                                  int ifindex);
 150 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 151                                  int ifidx);
 152 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 153 #endif /* HOSTAPD */
 154
 155
 156 /* nl80211 code */
 157 static int ack_handler(struct nl_msg *msg, void *arg)
 158 {
 159         int *err = arg;
 160         *err = 0;
 161         return NL_STOP;
 162 }
 163
 164 static int finish_handler(struct nl_msg *msg, void *arg)
 165 {
 166         int *ret = arg;
 167         *ret = 0;
 168         return NL_SKIP;
 169 }
 170
 171 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 172                          void *arg)
 173 {
 174         int *ret = arg;
 175         *ret = err->error;
 176         return NL_SKIP;
 177 }
 178
 179
 180 static int no_seq_check(struct nl_msg *msg, void *arg)
 181 {
 182         return NL_OK;
 183 }
 184
 185
 186 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 187                               struct nl_msg *msg,
 188                               int (*valid_handler)(struct nl_msg *, void *),
 189                               void *valid_data)
 190 {
 191         struct nl_cb *cb;
 192         int err = -ENOMEM;
 193
 194         cb = nl_cb_clone(drv->nl_cb);
 195         if (!cb)
 196                 goto out;
 197
 198         err = nl_send_auto_complete(drv->nl_handle, msg);
 199         if (err < 0)
 200                 goto out;
 201
 202         err = 1;
 203
 204         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 205         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 206         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 207
 208         if (valid_handler)
 209                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 210                           valid_handler, valid_data);
 211
 212         while (err > 0)
 213                 nl_recvmsgs(drv->nl_handle, cb);
 214  out:
 215         nl_cb_put(cb);
 216         nlmsg_free(msg);
 217         return err;
 218 }
 219
 220
 221 struct family_data {
 222         const char *group;
 223         int id;
 224 };
 225
 226
 227 static int family_handler(struct nl_msg *msg, void *arg)
 228 {
 229         struct family_data *res = arg;
 230         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 231         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 232         struct nlattr *mcgrp;
 233         int i;
 234
 235         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 236                   genlmsg_attrlen(gnlh, 0), NULL);
 237         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 238                 return NL_SKIP;
 239
 240         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 241                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 242                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 243                           nla_len(mcgrp), NULL);
 244                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 245                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 246                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 247                                res->group,
 248                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 249                         continue;
 250                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 251                 break;
 252         };
 253
 254         return NL_SKIP;
 255 }
 256
 257
 258 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 259                                const char *family, const char *group)
 260 {
 261         struct nl_msg *msg;
 262         int ret = -1;
 263         struct family_data res = { group, -ENOENT };
 264
 265         msg = nlmsg_alloc();
 266         if (!msg)
 267                 return -ENOMEM;
 268         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 269                     0, 0, CTRL_CMD_GETFAMILY, 0);
 270         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 271
 272         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 273         msg = NULL;
 274         if (ret == 0)
 275                 ret = res.id;
 276
 277 nla_put_failure:
 278         nlmsg_free(msg);
 279         return ret;
 280 }
 281
 282
 283 #ifdef HOSTAPD
 284 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 285                         const char *ifname, u8 *addr)
 286 {
 287         struct ifreq ifr;
 288
 289         os_memset(&ifr, 0, sizeof(ifr));
 290         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 291         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 292                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 293                            ifname, errno, strerror(errno));
 294                 return -1;
 295         }
 296
 297         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 298                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 299                            ifname, ifr.ifr_hwaddr.sa_family);
 300                 return -1;
 301         }
 302         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 303
 304         return 0;
 305 }
 306
 307
 308 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 309                         const char *ifname, const u8 *addr)
 310 {
 311         struct ifreq ifr;
 312
 313         os_memset(&ifr, 0, sizeof(ifr));
 314         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 315         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 316         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 317
 318         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 319                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 320                            ifname, errno, strerror(errno));
 321                 return -1;
 322         }
 323
 324         return 0;
 325 }
 326 #endif /* HOSTAPD */
 327
 328
 329 #ifndef HOSTAPD
 330
 331 static int wpa_driver_nl80211_send_oper_ifla(
 332         struct wpa_driver_nl80211_data *drv,
 333         int linkmode, int operstate)
 334 {
 335         struct {
 336                 struct nlmsghdr hdr;
 337                 struct ifinfomsg ifinfo;
 338                 char opts[16];
 339         } req;
 340         struct rtattr *rta;
 341         static int nl_seq;
 342         ssize_t ret;
 343
 344         os_memset(&req, 0, sizeof(req));
 345
 346         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 347         req.hdr.nlmsg_type = RTM_SETLINK;
 348         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 349         req.hdr.nlmsg_seq = ++nl_seq;
 350         req.hdr.nlmsg_pid = 0;
 351
 352         req.ifinfo.ifi_family = AF_UNSPEC;
 353         req.ifinfo.ifi_type = 0;
 354         req.ifinfo.ifi_index = drv->ifindex;
 355         req.ifinfo.ifi_flags = 0;
 356         req.ifinfo.ifi_change = 0;
 357
 358         if (linkmode != -1) {
 359                 rta = (struct rtattr *)
 360                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 361                 rta->rta_type = IFLA_LINKMODE;
 362                 rta->rta_len = RTA_LENGTH(sizeof(char));
 363                 *((char *) RTA_DATA(rta)) = linkmode;
 364                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 365                         RTA_LENGTH(sizeof(char));
 366         }
 367         if (operstate != -1) {
 368                 rta = (struct rtattr *)
 369                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 370                 rta->rta_type = IFLA_OPERSTATE;
 371                 rta->rta_len = RTA_LENGTH(sizeof(char));
 372                 *((char *) RTA_DATA(rta)) = operstate;
 373                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 374                         RTA_LENGTH(sizeof(char));
 375         }
 376
 377         wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
 378                    linkmode, operstate);
 379
 380         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 381         if (ret < 0) {
 382                 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
 383                            " %s (assume operstate is not supported)",
 384                            strerror(errno));
 385         }
 386
 387         return ret < 0 ? -1 : 0;
 388 }
 389
 390
 391 #ifndef NO_WEXT
 392 static int wpa_driver_nl80211_set_auth_param(
 393         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 394 {
 395         struct iwreq iwr;
 396         int ret = 0;
 397
 398         os_memset(&iwr, 0, sizeof(iwr));
 399         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 400         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 401         iwr.u.param.value = value;
 402
 403         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 404                 if (errno != EOPNOTSUPP) {
 405                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 406                                    "value 0x%x) failed: %s)",
 407                                    idx, value, strerror(errno));
 408                 }
 409                 ret = errno == EOPNOTSUPP ? -2 : -1;
 410         }
 411
 412         return ret;
 413 }
 414 #endif /* NO_WEXT */
 415
 416
 417 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 418 {
 419         struct wpa_driver_nl80211_data *drv = priv;
 420         if (!drv->associated)
 421                 return -1;
 422         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 423         return 0;
 424 }
 425
 426
 427 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 428 {
 429         struct wpa_driver_nl80211_data *drv = priv;
 430         if (!drv->associated)
 431                 return -1;
 432         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 433         return drv->ssid_len;
 434 }
 435
 436
 437 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 438                                           void *ctx, char *buf, size_t len,
 439                                           int del)
 440 {
 441         union wpa_event_data event;
 442
 443         os_memset(&event, 0, sizeof(event));
 444         if (len > sizeof(event.interface_status.ifname))
 445                 len = sizeof(event.interface_status.ifname) - 1;
 446         os_memcpy(event.interface_status.ifname, buf, len);
 447         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 448                 EVENT_INTERFACE_ADDED;
 449
 450         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 451                    del ? "DEL" : "NEW",
 452                    event.interface_status.ifname,
 453                    del ? "removed" : "added");
 454
 455         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 456                 if (del)
 457                         drv->if_removed = 1;
 458                 else
 459                         drv->if_removed = 0;
 460         }
 461
 462         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 463 }
 464
 465
 466 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 467                                          struct nlmsghdr *h)
 468 {
 469         struct ifinfomsg *ifi;
 470         int attrlen, _nlmsg_len, rta_len;
 471         struct rtattr *attr;
 472
 473         ifi = NLMSG_DATA(h);
 474
 475         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 476
 477         attrlen = h->nlmsg_len - _nlmsg_len;
 478         if (attrlen < 0)
 479                 return 0;
 480
 481         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 482
 483         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 484         while (RTA_OK(attr, attrlen)) {
 485                 if (attr->rta_type == IFLA_IFNAME) {
 486                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 487                             == 0)
 488                                 return 1;
 489                         else
 490                                 break;
 491                 }
 492                 attr = RTA_NEXT(attr, attrlen);
 493         }
 494
 495         return 0;
 496 }
 497
 498
 499 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 500                                           int ifindex, struct nlmsghdr *h)
 501 {
 502         if (drv->ifindex == ifindex)
 503                 return 1;
 504
 505         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 506                 drv->ifindex = if_nametoindex(drv->ifname);
 507                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 508                            "interface");
 509                 wpa_driver_nl80211_finish_drv_init(drv);
 510                 return 1;
 511         }
 512
 513         return 0;
 514 }
 515
 516
 517 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 518                                               void *ctx, struct nlmsghdr *h,
 519                                               size_t len)
 520 {
 521         struct ifinfomsg *ifi;
 522         int attrlen, _nlmsg_len, rta_len;
 523         struct rtattr * attr;
 524
 525         if (len < sizeof(*ifi))
 526                 return;
 527
 528         ifi = NLMSG_DATA(h);
 529
 530         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 531                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 532                            ifi->ifi_index);
 533                 return;
 534         }
 535
 536         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 537                    "(%s%s%s%s)",
 538                    drv->operstate, ifi->ifi_flags,
 539                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 540                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 541                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 542                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 543         /*
 544          * Some drivers send the association event before the operup event--in
 545          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 546          * fails. This will hit us when wpa_supplicant does not need to do
 547          * IEEE 802.1X authentication
 548          */
 549         if (drv->operstate == 1 &&
 550             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 551             !(ifi->ifi_flags & IFF_RUNNING))
 552                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 553
 554         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 555
 556         attrlen = h->nlmsg_len - _nlmsg_len;
 557         if (attrlen < 0)
 558                 return;
 559
 560         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 561
 562         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 563         while (RTA_OK(attr, attrlen)) {
 564                 if (attr->rta_type == IFLA_IFNAME) {
 565                         wpa_driver_nl80211_event_link(
 566                                 drv, ctx,
 567                                 ((char *) attr) + rta_len,
 568                                 attr->rta_len - rta_len, 0);
 569                 }
 570                 attr = RTA_NEXT(attr, attrlen);
 571         }
 572 }
 573
 574
 575 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 576                                               void *ctx, struct nlmsghdr *h,
 577                                               size_t len)
 578 {
 579         struct ifinfomsg *ifi;
 580         int attrlen, _nlmsg_len, rta_len;
 581         struct rtattr * attr;
 582
 583         if (len < sizeof(*ifi))
 584                 return;
 585
 586         ifi = NLMSG_DATA(h);
 587
 588         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 589
 590         attrlen = h->nlmsg_len - _nlmsg_len;
 591         if (attrlen < 0)
 592                 return;
 593
 594         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 595
 596         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 597         while (RTA_OK(attr, attrlen)) {
 598                 if (attr->rta_type == IFLA_IFNAME) {
 599                         wpa_driver_nl80211_event_link(
 600                                 drv, ctx,
 601                                 ((char *) attr) + rta_len,
 602                                 attr->rta_len - rta_len, 1);
 603                 }
 604                 attr = RTA_NEXT(attr, attrlen);
 605         }
 606 }
 607
 608
 609 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 610                                                   void *sock_ctx)
 611 {
 612         char buf[8192];
 613         int left;
 614         struct sockaddr_nl from;
 615         socklen_t fromlen;
 616         struct nlmsghdr *h;
 617         int max_events = 10;
 618
 619 try_again:
 620         fromlen = sizeof(from);
 621         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 622                         (struct sockaddr *) &from, &fromlen);
 623         if (left < 0) {
 624                 if (errno != EINTR && errno != EAGAIN)
 625                         perror("recvfrom(netlink)");
 626                 return;
 627         }
 628
 629         h = (struct nlmsghdr *) buf;
 630         while (left >= (int) sizeof(*h)) {
 631                 int len, plen;
 632
 633                 len = h->nlmsg_len;
 634                 plen = len - sizeof(*h);
 635                 if (len > left || plen < 0) {
 636                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 637                                    "len=%d left=%d plen=%d",
 638                                    len, left, plen);
 639                         break;
 640                 }
 641
 642                 switch (h->nlmsg_type) {
 643                 case RTM_NEWLINK:
 644                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 645                                                           h, plen);
 646                         break;
 647                 case RTM_DELLINK:
 648                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 649                                                           h, plen);
 650                         break;
 651                 }
 652
 653                 len = NLMSG_ALIGN(len);
 654                 left -= len;
 655                 h = (struct nlmsghdr *) ((char *) h + len);
 656         }
 657
 658         if (left > 0) {
 659                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 660                            "message", left);
 661         }
 662
 663         if (--max_events > 0) {
 664                 /*
 665                  * Try to receive all events in one eloop call in order to
 666                  * limit race condition on cases where AssocInfo event, Assoc
 667                  * event, and EAPOL frames are received more or less at the
 668                  * same time. We want to process the event messages first
 669                  * before starting EAPOL processing.
 670                  */
 671                 goto try_again;
 672         }
 673 }
 674
 675
 676 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 677                             const u8 *frame, size_t len)
 678 {
 679         const struct ieee80211_mgmt *mgmt;
 680         union wpa_event_data event;
 681
 682         mgmt = (const struct ieee80211_mgmt *) frame;
 683         if (len < 24 + sizeof(mgmt->u.auth)) {
 684                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 685                            "frame");
 686                 return;
 687         }
 688
 689         os_memset(&event, 0, sizeof(event));
 690         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 691         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 692         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 693         if (len > 24 + sizeof(mgmt->u.auth)) {
 694                 event.auth.ies = mgmt->u.auth.variable;
 695                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 696         }
 697
 698         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 699 }
 700
 701
 702 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 703                             const u8 *frame, size_t len)
 704 {
 705         const struct ieee80211_mgmt *mgmt;
 706         union wpa_event_data event;
 707         u16 status;
 708
 709         mgmt = (const struct ieee80211_mgmt *) frame;
 710         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 711                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 712                            "frame");
 713                 return;
 714         }
 715
 716         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 717         if (status != WLAN_STATUS_SUCCESS) {
 718                 os_memset(&event, 0, sizeof(event));
 719                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 720                         event.assoc_reject.resp_ies =
 721                                 (u8 *) mgmt->u.assoc_resp.variable;
 722                         event.assoc_reject.resp_ies_len =
 723                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 724                 }
 725                 event.assoc_reject.status_code = status;
 726
 727                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 728                 return;
 729         }
 730
 731         drv->associated = 1;
 732         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 733
 734         os_memset(&event, 0, sizeof(event));
 735         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 736                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 737                 event.assoc_info.resp_ies_len =
 738                         len - 24 - sizeof(mgmt->u.assoc_resp);
 739         }
 740
 741         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 742 }
 743
 744 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 745                                enum nl80211_commands cmd, struct nlattr *status,
 746                                struct nlattr *addr, struct nlattr *req_ie,
 747                                struct nlattr *resp_ie)
 748 {
 749         union wpa_event_data event;
 750
 751         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 752                 /*
 753                  * Avoid reporting two association events that would confuse
 754                  * the core code.
 755                  */
 756                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 757                            "when using userspace SME", cmd);
 758                 return;
 759         }
 760
 761         os_memset(&event, 0, sizeof(event));
 762         if (cmd == NL80211_CMD_CONNECT &&
 763             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 764                 if (resp_ie) {
 765                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 766                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 767                 }
 768                 event.assoc_reject.status_code = nla_get_u16(status);
 769                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 770                 return;
 771         }
 772
 773         drv->associated = 1;
 774         if (addr)
 775                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 776
 777         if (req_ie) {
 778                 event.assoc_info.req_ies = nla_data(req_ie);
 779                 event.assoc_info.req_ies_len = nla_len(req_ie);
 780         }
 781         if (resp_ie) {
 782                 event.assoc_info.resp_ies = nla_data(resp_ie);
 783                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 784         }
 785
 786         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 787 }
 788
 789 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 790                                enum nl80211_commands cmd, struct nlattr *addr)
 791 {
 792         union wpa_event_data event;
 793         enum wpa_event_type ev;
 794
 795         if (nla_len(addr) != ETH_ALEN)
 796                 return;
 797
 798         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 799                    cmd, MAC2STR((u8 *) nla_data(addr)));
 800
 801         if (cmd == NL80211_CMD_AUTHENTICATE)
 802                 ev = EVENT_AUTH_TIMED_OUT;
 803         else if (cmd == NL80211_CMD_ASSOCIATE)
 804                 ev = EVENT_ASSOC_TIMED_OUT;
 805         else
 806                 return;
 807
 808         os_memset(&event, 0, sizeof(event));
 809         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 810         wpa_supplicant_event(drv->ctx, ev, &event);
 811 }
 812
 813
 814 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 815                        enum nl80211_commands cmd, struct nlattr *frame,
 816                        struct nlattr *addr, struct nlattr *timed_out)
 817 {
 818         if (timed_out && addr) {
 819                 mlme_timeout_event(drv, cmd, addr);
 820                 return;
 821         }
 822
 823         if (frame == NULL) {
 824                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 825                            "data", cmd);
 826                 return;
 827         }
 828
 829         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 830         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 831                     nla_data(frame), nla_len(frame));
 832
 833         switch (cmd) {
 834         case NL80211_CMD_AUTHENTICATE:
 835                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 836                 break;
 837         case NL80211_CMD_ASSOCIATE:
 838                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 839                 break;
 840         case NL80211_CMD_DEAUTHENTICATE:
 841                 drv->associated = 0;
 842                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 843                 break;
 844         case NL80211_CMD_DISASSOCIATE:
 845                 drv->associated = 0;
 846                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 847                 break;
 848         default:
 849                 break;
 850         }
 851 }
 852
 853 #endif /* HOSTAPD */
 854
 855
 856 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 857                                            struct nlattr *tb[])
 858 {
 859         union wpa_event_data data;
 860
 861         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 862         os_memset(&data, 0, sizeof(data));
 863         if (tb[NL80211_ATTR_MAC]) {
 864                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 865                             nla_data(tb[NL80211_ATTR_MAC]),
 866                             nla_len(tb[NL80211_ATTR_MAC]));
 867                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 868         }
 869         if (tb[NL80211_ATTR_KEY_SEQ]) {
 870                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 871                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 872                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 873         }
 874         if (tb[NL80211_ATTR_KEY_TYPE]) {
 875                 enum nl80211_key_type key_type =
 876                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 877                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 878                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 879                         data.michael_mic_failure.unicast = 1;
 880         } else
 881                 data.michael_mic_failure.unicast = 1;
 882
 883         if (tb[NL80211_ATTR_KEY_IDX]) {
 884                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 885                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 886         }
 887
 888         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 889 }
 890
 891
 892 static int process_event(struct nl_msg *msg, void *arg)
 893 {
 894         struct wpa_driver_nl80211_data *drv = arg;
 895         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 896         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 897
 898         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 899                   genlmsg_attrlen(gnlh, 0), NULL);
 900
 901         if (tb[NL80211_ATTR_IFINDEX]) {
 902                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 903                 if (ifindex != drv->ifindex) {
 904                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 905                                    " for foreign interface (ifindex %d)",
 906                                    gnlh->cmd, ifindex);
 907                         return NL_SKIP;
 908                 }
 909         }
 910
 911         if (drv->ap_scan_as_station &&
 912             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 913              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 914                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 915                 drv->ap_scan_as_station = 0;
 916         }
 917
 918         switch (gnlh->cmd) {
 919         case NL80211_CMD_NEW_SCAN_RESULTS:
 920                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 921                 drv->scan_complete_events = 1;
 922                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 923                                      drv->ctx);
 924                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 925                 break;
 926         case NL80211_CMD_SCAN_ABORTED:
 927                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 928                 /*
 929                  * Need to indicate that scan results are available in order
 930                  * not to make wpa_supplicant stop its scanning.
 931                  */
 932                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 933                                      drv->ctx);
 934                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 935                 break;
 936 #ifndef HOSTAPD
 937         case NL80211_CMD_AUTHENTICATE:
 938         case NL80211_CMD_ASSOCIATE:
 939         case NL80211_CMD_DEAUTHENTICATE:
 940         case NL80211_CMD_DISASSOCIATE:
 941                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 942                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
 943                 break;
 944         case NL80211_CMD_CONNECT:
 945         case NL80211_CMD_ROAM:
 946                 mlme_event_connect(drv, gnlh->cmd,
 947                                    tb[NL80211_ATTR_STATUS_CODE],
 948                                    tb[NL80211_ATTR_MAC],
 949                                    tb[NL80211_ATTR_REQ_IE],
 950                                    tb[NL80211_ATTR_RESP_IE]);
 951                 break;
 952         case NL80211_CMD_DISCONNECT:
 953                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 954                         /*
 955                          * Avoid reporting two disassociation events that could
 956                          * confuse the core code.
 957                          */
 958                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 959                                    "event when using userspace SME");
 960                         break;
 961                 }
 962                 drv->associated = 0;
 963                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 964                 break;
 965 #endif /* HOSTAPD */
 966         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 967                 mlme_event_michael_mic_failure(drv, tb);
 968                 break;
 969         default:
 970                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 971                            "(cmd=%d)", gnlh->cmd);
 972                 break;
 973         }
 974
 975         return NL_SKIP;
 976 }
 977
 978
 979 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 980                                              void *sock_ctx)
 981 {
 982         struct nl_cb *cb;
 983         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 984
 985         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 986
 987         cb = nl_cb_clone(drv->nl_cb);
 988         if (!cb)
 989                 return;
 990         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 991         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 992         nl_recvmsgs(drv->nl_handle_event, cb);
 993         nl_cb_put(cb);
 994 }
 995
 996
 997 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 998                                    const char *ifname, int dev_up)
 999 {
1000         struct ifreq ifr;
1001
1002         if (drv->ioctl_sock < 0)
1003                 return -1;
1004
1005         os_memset(&ifr, 0, sizeof(ifr));
1006         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
1007
1008         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
1009                 perror("ioctl[SIOCGIFFLAGS]");
1010                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
1011                            ifname);
1012                 return -1;
1013         }
1014
1015         if (dev_up) {
1016                 if (ifr.ifr_flags & IFF_UP)
1017                         return 0;
1018                 ifr.ifr_flags |= IFF_UP;
1019         } else {
1020                 if (!(ifr.ifr_flags & IFF_UP))
1021                         return 0;
1022                 ifr.ifr_flags &= ~IFF_UP;
1023         }
1024
1025         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
1026                 perror("ioctl[SIOCSIFFLAGS]");
1027                 return -1;
1028         }
1029
1030         return 0;
1031 }
1032
1033
1034 /**
1035  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1036  * @priv: driver_nl80211 private data
1037  * @alpha2_arg: country to which to switch to
1038  * Returns: 0 on success, -1 on failure
1039  *
1040  * This asks nl80211 to set the regulatory domain for given
1041  * country ISO / IEC alpha2.
1042  */
1043 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1044 {
1045         struct wpa_driver_nl80211_data *drv = priv;
1046         char alpha2[3];
1047         struct nl_msg *msg;
1048
1049         msg = nlmsg_alloc();
1050         if (!msg)
1051                 return -ENOMEM;
1052
1053         alpha2[0] = alpha2_arg[0];
1054         alpha2[1] = alpha2_arg[1];
1055         alpha2[2] = '\0';
1056
1057         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1058                     0, NL80211_CMD_REQ_SET_REG, 0);
1059
1060         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1061         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1062                 return -EINVAL;
1063         return 0;
1064 nla_put_failure:
1065         return -EINVAL;
1066 }
1067
1068
1069 #ifndef HOSTAPD
1070 struct wiphy_info_data {
1071         int max_scan_ssids;
1072         int ap_supported;
1073         int auth_supported;
1074         int connect_supported;
1075 };
1076
1077
1078 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1079 {
1080         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1081         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1082         struct wiphy_info_data *info = arg;
1083
1084         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1085                   genlmsg_attrlen(gnlh, 0), NULL);
1086
1087         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1088                 info->max_scan_ssids =
1089                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1090
1091         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1092                 struct nlattr *nl_mode;
1093                 int i;
1094                 nla_for_each_nested(nl_mode,
1095                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1096                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1097                                 info->ap_supported = 1;
1098                                 break;
1099                         }
1100                 }
1101         }
1102
1103         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1104                 struct nlattr *nl_cmd;
1105                 int i;
1106
1107                 nla_for_each_nested(nl_cmd,
1108                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1109                         u32 cmd = nla_get_u32(nl_cmd);
1110                         if (cmd == NL80211_CMD_AUTHENTICATE)
1111                                 info->auth_supported = 1;
1112                         else if (cmd == NL80211_CMD_CONNECT)
1113                                 info->connect_supported = 1;
1114                 }
1115         }
1116
1117         return NL_SKIP;
1118 }
1119
1120
1121 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1122                                        struct wiphy_info_data *info)
1123 {
1124         struct nl_msg *msg;
1125
1126         os_memset(info, 0, sizeof(*info));
1127         msg = nlmsg_alloc();
1128         if (!msg)
1129                 return -1;
1130
1131         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1132                     0, NL80211_CMD_GET_WIPHY, 0);
1133
1134         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1135
1136         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1137                 return 0;
1138         msg = NULL;
1139 nla_put_failure:
1140         nlmsg_free(msg);
1141         return -1;
1142 }
1143
1144
1145 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1146 {
1147         struct wiphy_info_data info;
1148         if (wpa_driver_nl80211_get_info(drv, &info))
1149                 return -1;
1150         drv->has_capability = 1;
1151         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1152         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1153                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1154                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1155                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1156         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1157                 WPA_DRIVER_CAPA_ENC_WEP104 |
1158                 WPA_DRIVER_CAPA_ENC_TKIP |
1159                 WPA_DRIVER_CAPA_ENC_CCMP;
1160
1161         drv->capa.max_scan_ssids = info.max_scan_ssids;
1162         if (info.ap_supported)
1163                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1164
1165         if (info.auth_supported)
1166                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1167         else if (!info.connect_supported) {
1168                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1169                            "authentication/association or connect commands");
1170                 return -1;
1171         }
1172
1173         return 0;
1174 }
1175 #endif /* HOSTAPD */
1176
1177
1178 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1179                                       void *ctx)
1180 {
1181         int ret;
1182
1183         /* Initialize generic netlink and nl80211 */
1184
1185         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1186         if (drv->nl_cb == NULL) {
1187                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1188                            "callbacks");
1189                 goto err1;
1190         }
1191
1192         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1193         if (drv->nl_handle == NULL) {
1194                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1195                            "callbacks");
1196                 goto err2;
1197         }
1198
1199         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1200         if (drv->nl_handle_event == NULL) {
1201                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1202                            "callbacks (event)");
1203                 goto err2b;
1204         }
1205
1206         if (genl_connect(drv->nl_handle)) {
1207                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1208                            "netlink");
1209                 goto err3;
1210         }
1211
1212         if (genl_connect(drv->nl_handle_event)) {
1213                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1214                            "netlink (event)");
1215                 goto err3;
1216         }
1217
1218 #ifdef CONFIG_LIBNL20
1219         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1220                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1221                            "netlink cache");
1222                 goto err3;
1223         }
1224         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1225             0) {
1226                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1227                            "netlink cache (event)");
1228                 goto err3b;
1229         }
1230 #else /* CONFIG_LIBNL20 */
1231         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1232         if (drv->nl_cache == NULL) {
1233                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1234                            "netlink cache");
1235                 goto err3;
1236         }
1237         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1238         if (drv->nl_cache_event == NULL) {
1239                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1240                            "netlink cache (event)");
1241                 goto err3b;
1242         }
1243 #endif /* CONFIG_LIBNL20 */
1244
1245         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1246         if (drv->nl80211 == NULL) {
1247                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1248                            "found");
1249                 goto err4;
1250         }
1251
1252         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1253         if (ret >= 0)
1254                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1255         if (ret < 0) {
1256                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1257                            "membership for scan events: %d (%s)",
1258                            ret, strerror(-ret));
1259                 goto err4;
1260         }
1261
1262         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1263         if (ret >= 0)
1264                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1265         if (ret < 0) {
1266                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1267                            "membership for mlme events: %d (%s)",
1268                            ret, strerror(-ret));
1269                 goto err4;
1270         }
1271
1272         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1273                                  wpa_driver_nl80211_event_receive, drv, ctx);
1274
1275         return 0;
1276
1277 err4:
1278         nl_cache_free(drv->nl_cache_event);
1279 err3b:
1280         nl_cache_free(drv->nl_cache);
1281 err3:
1282         nl_handle_destroy(drv->nl_handle_event);
1283 err2b:
1284         nl_handle_destroy(drv->nl_handle);
1285 err2:
1286         nl_cb_put(drv->nl_cb);
1287 err1:
1288         return -1;
1289 }
1290
1291
1292 static int wpa_driver_nl80211_init_link_events(
1293         struct wpa_driver_nl80211_data *drv)
1294 {
1295 #ifdef HOSTAPD
1296         return 0;
1297 #else /* HOSTAPD */
1298         int s;
1299         struct sockaddr_nl local;
1300
1301         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1302         if (s < 0) {
1303                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1304                 return -1;
1305         }
1306
1307         os_memset(&local, 0, sizeof(local));
1308         local.nl_family = AF_NETLINK;
1309         local.nl_groups = RTMGRP_LINK;
1310         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1311                 perror("bind(netlink)");
1312                 close(s);
1313                 return -1;
1314         }
1315
1316         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1317                                  drv->ctx);
1318         drv->link_event_sock = s;
1319
1320         return 0;
1321 #endif /* HOSTAPD */
1322 }
1323
1324
1325 /**
1326  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1327  * @ctx: context to be used when calling wpa_supplicant functions,
1328  * e.g., wpa_supplicant_event()
1329  * @ifname: interface name, e.g., wlan0
1330  * Returns: Pointer to private data, %NULL on failure
1331  */
1332 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1333 {
1334         struct wpa_driver_nl80211_data *drv;
1335
1336         drv = os_zalloc(sizeof(*drv));
1337         if (drv == NULL)
1338                 return NULL;
1339         drv->ctx = ctx;
1340         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1341         drv->monitor_ifidx = -1;
1342         drv->monitor_sock = -1;
1343         drv->link_event_sock = -1;
1344         drv->ioctl_sock = -1;
1345
1346         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1347                 os_free(drv);
1348                 return NULL;
1349         }
1350
1351         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1352         if (drv->ioctl_sock < 0) {
1353                 perror("socket(PF_INET,SOCK_DGRAM)");
1354                 goto failed;
1355         }
1356
1357         if (wpa_driver_nl80211_init_link_events(drv) ||
1358             wpa_driver_nl80211_finish_drv_init(drv))
1359                 goto failed;
1360
1361         return drv;
1362
1363 failed:
1364         if (drv->link_event_sock >= 0) {
1365                 eloop_unregister_read_sock(drv->link_event_sock);
1366                 close(drv->link_event_sock);
1367         }
1368         if (drv->ioctl_sock >= 0)
1369                 close(drv->ioctl_sock);
1370
1371         genl_family_put(drv->nl80211);
1372         nl_cache_free(drv->nl_cache);
1373         nl_handle_destroy(drv->nl_handle);
1374         nl_cb_put(drv->nl_cb);
1375
1376         os_free(drv);
1377         return NULL;
1378 }
1379
1380
1381 static int
1382 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1383 {
1384         drv->ifindex = if_nametoindex(drv->ifname);
1385
1386 #ifndef HOSTAPD
1387         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1388                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1389                            "use managed mode");
1390         }
1391
1392         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1393                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1394                            "UP", drv->ifname);
1395                 return -1;
1396         }
1397
1398         if (wpa_driver_nl80211_capa(drv))
1399                 return -1;
1400
1401         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1402 #endif /* HOSTAPD */
1403
1404         return 0;
1405 }
1406
1407
1408 #ifdef HOSTAPD
1409 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1410 {
1411         struct i802_bss *bss, *prev;
1412         bss = drv->bss.next;
1413         while (bss) {
1414                 prev = bss;
1415                 bss = bss->next;
1416                 os_free(bss);
1417         }
1418 }
1419 #endif /* HOSTAPD */
1420
1421
1422 #if defined(CONFIG_AP) || defined(HOSTAPD)
1423 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1424 {
1425         struct nl_msg *msg;
1426
1427         msg = nlmsg_alloc();
1428         if (!msg)
1429                 return -ENOMEM;
1430
1431         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1432                     0, NL80211_CMD_DEL_BEACON, 0);
1433         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1434
1435         return send_and_recv_msgs(drv, msg, NULL, NULL);
1436  nla_put_failure:
1437         return -ENOBUFS;
1438 }
1439 #endif /* CONFIG_AP || HOSTAPD */
1440
1441
1442 /**
1443  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1444  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1445  *
1446  * Shut down driver interface and processing of driver events. Free
1447  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1448  */
1449 static void wpa_driver_nl80211_deinit(void *priv)
1450 {
1451         struct wpa_driver_nl80211_data *drv = priv;
1452
1453 #if defined(CONFIG_AP) || defined(HOSTAPD)
1454         nl80211_remove_monitor_interface(drv);
1455         if (drv->monitor_sock >= 0) {
1456                 eloop_unregister_read_sock(drv->monitor_sock);
1457                 close(drv->monitor_sock);
1458         }
1459
1460         if (drv->nlmode == NL80211_IFTYPE_AP)
1461                 wpa_driver_nl80211_del_beacon(drv);
1462 #endif /* CONFIG_AP || HOSTAPD */
1463
1464 #ifdef HOSTAPD
1465         if (drv->last_freq_ht) {
1466                 /* Clear HT flags from the driver */
1467                 struct hostapd_freq_params freq;
1468                 os_memset(&freq, 0, sizeof(freq));
1469                 freq.freq = drv->last_freq;
1470                 i802_set_freq(priv, &freq);
1471         }
1472
1473         if (drv->eapol_sock >= 0) {
1474                 eloop_unregister_read_sock(drv->eapol_sock);
1475                 close(drv->eapol_sock);
1476         }
1477
1478         if (drv->if_indices != drv->default_if_indices)
1479                 os_free(drv->if_indices);
1480
1481         wpa_driver_nl80211_free_bss(drv);
1482 #else /* HOSTAPD */
1483 #ifndef NO_WEXT
1484         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1485 #endif /* NO_WEXT */
1486
1487         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1488
1489         if (drv->link_event_sock >= 0) {
1490                 eloop_unregister_read_sock(drv->link_event_sock);
1491                 close(drv->link_event_sock);
1492         }
1493 #endif /* HOSTAPD */
1494
1495         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1496
1497         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1498         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1499
1500         if (drv->ioctl_sock >= 0)
1501                 close(drv->ioctl_sock);
1502
1503         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1504         genl_family_put(drv->nl80211);
1505         nl_cache_free(drv->nl_cache);
1506         nl_cache_free(drv->nl_cache_event);
1507         nl_handle_destroy(drv->nl_handle);
1508         nl_handle_destroy(drv->nl_handle_event);
1509         nl_cb_put(drv->nl_cb);
1510
1511         os_free(drv);
1512 }
1513
1514
1515 /**
1516  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1517  * @eloop_ctx: Driver private data
1518  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1519  *
1520  * This function can be used as registered timeout when starting a scan to
1521  * generate a scan completed event if the driver does not report this.
1522  */
1523 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1524 {
1525         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1526         if (drv->ap_scan_as_station) {
1527                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1528                 drv->ap_scan_as_station = 0;
1529         }
1530         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1531         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1532 }
1533
1534
1535 /**
1536  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1537  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1538  * @params: Scan parameters
1539  * Returns: 0 on success, -1 on failure
1540  */
1541 static int wpa_driver_nl80211_scan(void *priv,
1542                                    struct wpa_driver_scan_params *params)
1543 {
1544         struct wpa_driver_nl80211_data *drv = priv;
1545         int ret = 0, timeout;
1546         struct nl_msg *msg, *ssids, *freqs;
1547         size_t i;
1548
1549         msg = nlmsg_alloc();
1550         ssids = nlmsg_alloc();
1551         freqs = nlmsg_alloc();
1552         if (!msg || !ssids || !freqs) {
1553                 nlmsg_free(msg);
1554                 nlmsg_free(ssids);
1555                 nlmsg_free(freqs);
1556                 return -1;
1557         }
1558
1559         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1560                     NL80211_CMD_TRIGGER_SCAN, 0);
1561
1562         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1563
1564         for (i = 0; i < params->num_ssids; i++) {
1565                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1566                         params->ssids[i].ssid);
1567         }
1568         if (params->num_ssids)
1569                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1570
1571         if (params->extra_ies) {
1572                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1573                         params->extra_ies);
1574         }
1575
1576         if (params->freqs) {
1577                 for (i = 0; params->freqs[i]; i++)
1578                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1579                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1580         }
1581
1582         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1583         msg = NULL;
1584         if (ret) {
1585                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1586                            "(%s)", ret, strerror(-ret));
1587 #ifdef HOSTAPD
1588                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1589                         /*
1590                          * mac80211 does not allow scan requests in AP mode, so
1591                          * try to do this in station mode.
1592                          */
1593                         if (wpa_driver_nl80211_set_mode(drv,
1594                                                         IEEE80211_MODE_INFRA))
1595                                 goto nla_put_failure;
1596
1597                         if (wpa_driver_nl80211_scan(drv, params)) {
1598                                 wpa_driver_nl80211_set_mode(drv,
1599                                                             IEEE80211_MODE_AP);
1600                                 goto nla_put_failure;
1601                         }
1602
1603                         /* Restore AP mode when processing scan results */
1604                         drv->ap_scan_as_station = 1;
1605                         ret = 0;
1606                 } else
1607                         goto nla_put_failure;
1608 #else /* HOSTAPD */
1609                 goto nla_put_failure;
1610 #endif /* HOSTAPD */
1611         }
1612
1613         /* Not all drivers generate "scan completed" wireless event, so try to
1614          * read results after a timeout. */
1615         timeout = 10;
1616         if (drv->scan_complete_events) {
1617                 /*
1618                  * The driver seems to deliver events to notify when scan is
1619                  * complete, so use longer timeout to avoid race conditions
1620                  * with scanning and following association request.
1621                  */
1622                 timeout = 30;
1623         }
1624         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1625                    "seconds", ret, timeout);
1626         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1627         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1628                                drv, drv->ctx);
1629
1630 nla_put_failure:
1631         nlmsg_free(ssids);
1632         nlmsg_free(msg);
1633         nlmsg_free(freqs);
1634         return ret;
1635 }
1636
1637
1638 static int bss_info_handler(struct nl_msg *msg, void *arg)
1639 {
1640         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1641         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1642         struct nlattr *bss[NL80211_BSS_MAX + 1];
1643         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1644                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1645                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1646                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1647                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1648                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1649                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1650                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1651                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1652         };
1653         struct wpa_scan_results *res = arg;
1654         struct wpa_scan_res **tmp;
1655         struct wpa_scan_res *r;
1656         const u8 *ie;
1657         size_t ie_len;
1658
1659         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1660                   genlmsg_attrlen(gnlh, 0), NULL);
1661         if (!tb[NL80211_ATTR_BSS])
1662                 return NL_SKIP;
1663         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1664                              bss_policy))
1665                 return NL_SKIP;
1666         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1667                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1668                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1669         } else {
1670                 ie = NULL;
1671                 ie_len = 0;
1672         }
1673
1674         r = os_zalloc(sizeof(*r) + ie_len);
1675         if (r == NULL)
1676                 return NL_SKIP;
1677         if (bss[NL80211_BSS_BSSID])
1678                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1679                           ETH_ALEN);
1680         if (bss[NL80211_BSS_FREQUENCY])
1681                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1682         if (bss[NL80211_BSS_BEACON_INTERVAL])
1683                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1684         if (bss[NL80211_BSS_CAPABILITY])
1685                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1686         r->flags |= WPA_SCAN_NOISE_INVALID;
1687         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1688                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1689                 r->level /= 100; /* mBm to dBm */
1690                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1691         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1692                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1693                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1694         } else
1695                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1696         if (bss[NL80211_BSS_TSF])
1697                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1698         r->ie_len = ie_len;
1699         if (ie)
1700                 os_memcpy(r + 1, ie, ie_len);
1701
1702         tmp = os_realloc(res->res,
1703                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1704         if (tmp == NULL) {
1705                 os_free(r);
1706                 return NL_SKIP;
1707         }
1708         tmp[res->num++] = r;
1709         res->res = tmp;
1710
1711         return NL_SKIP;
1712 }
1713
1714
1715 /**
1716  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1717  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1718  * Returns: Scan results on success, -1 on failure
1719  */
1720 static struct wpa_scan_results *
1721 wpa_driver_nl80211_get_scan_results(void *priv)
1722 {
1723         struct wpa_driver_nl80211_data *drv = priv;
1724         struct nl_msg *msg;
1725         struct wpa_scan_results *res;
1726         int ret;
1727
1728         res = os_zalloc(sizeof(*res));
1729         if (res == NULL)
1730                 return 0;
1731         msg = nlmsg_alloc();
1732         if (!msg)
1733                 goto nla_put_failure;
1734
1735         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1736                     NL80211_CMD_GET_SCAN, 0);
1737         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1738
1739         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1740         msg = NULL;
1741         if (ret == 0) {
1742                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1743                            (unsigned long) res->num);
1744                 return res;
1745         }
1746         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1747                    "(%s)", ret, strerror(-ret));
1748 nla_put_failure:
1749         nlmsg_free(msg);
1750         wpa_scan_results_free(res);
1751         return NULL;
1752 }
1753
1754
1755 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1756                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1757                        const u8 *seq, size_t seq_len,
1758                        const u8 *key, size_t key_len)
1759 {
1760         struct nl_msg *msg;
1761         int ret;
1762
1763         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1764                    "set_tx=%d seq_len=%lu key_len=%lu",
1765                    __func__, ifindex, alg, addr, key_idx, set_tx,
1766                    (unsigned long) seq_len, (unsigned long) key_len);
1767
1768         msg = nlmsg_alloc();
1769         if (!msg)
1770                 return -ENOMEM;
1771
1772         if (alg == WPA_ALG_NONE) {
1773                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1774                             0, NL80211_CMD_DEL_KEY, 0);
1775         } else {
1776                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1777                             0, NL80211_CMD_NEW_KEY, 0);
1778                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1779                 switch (alg) {
1780                 case WPA_ALG_WEP:
1781                         if (key_len == 5)
1782                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1783                                             WLAN_CIPHER_SUITE_WEP40);
1784                         else
1785                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1786                                             WLAN_CIPHER_SUITE_WEP104);
1787                         break;
1788                 case WPA_ALG_TKIP:
1789                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1790                                     WLAN_CIPHER_SUITE_TKIP);
1791                         break;
1792                 case WPA_ALG_CCMP:
1793                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1794                                     WLAN_CIPHER_SUITE_CCMP);
1795                         break;
1796                 case WPA_ALG_IGTK:
1797                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1798                                     WLAN_CIPHER_SUITE_AES_CMAC);
1799                         break;
1800                 default:
1801                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1802                                    "algorithm %d", __func__, alg);
1803                         nlmsg_free(msg);
1804                         return -1;
1805                 }
1806         }
1807
1808         if (seq && seq_len)
1809                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1810
1811         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1812         {
1813                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1814                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1815         }
1816         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1817         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1818
1819         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1820         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1821                 ret = 0;
1822         if (ret)
1823                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1824                            ret, strerror(-ret));
1825
1826         /*
1827          * If we failed or don't need to set the default TX key (below),
1828          * we're done here.
1829          */
1830         if (ret || !set_tx || alg == WPA_ALG_NONE)
1831                 return ret;
1832 #ifdef HOSTAPD /* FIX: is this needed? */
1833         if (addr)
1834                 return ret;
1835 #endif /* HOSTAPD */
1836
1837         msg = nlmsg_alloc();
1838         if (!msg)
1839                 return -ENOMEM;
1840
1841         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1842                     0, NL80211_CMD_SET_KEY, 0);
1843         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1844         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1845         if (alg == WPA_ALG_IGTK)
1846                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1847         else
1848                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1849
1850         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1851         if (ret == -ENOENT)
1852                 ret = 0;
1853         if (ret)
1854                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1855                            "err=%d %s)", ret, strerror(-ret));
1856         return ret;
1857
1858 nla_put_failure:
1859         return -ENOBUFS;
1860 }
1861
1862
1863 #ifndef HOSTAPD
1864
1865 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1866                                  struct nl_msg *msg)
1867 {
1868         int i, privacy = 0;
1869         struct nlattr *nl_keys, *nl_key;
1870
1871         for (i = 0; i < 4; i++) {
1872                 if (!params->wep_key[i])
1873                         continue;
1874                 privacy = 1;
1875                 break;
1876         }
1877         if (!privacy)
1878                 return 0;
1879
1880         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1881
1882         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1883         if (!nl_keys)
1884                 goto nla_put_failure;
1885
1886         for (i = 0; i < 4; i++) {
1887                 if (!params->wep_key[i])
1888                         continue;
1889
1890                 nl_key = nla_nest_start(msg, i);
1891                 if (!nl_key)
1892                         goto nla_put_failure;
1893
1894                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1895                         params->wep_key[i]);
1896                 if (params->wep_key_len[i] == 5)
1897                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1898                                     WLAN_CIPHER_SUITE_WEP40);
1899                 else
1900                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1901                                     WLAN_CIPHER_SUITE_WEP104);
1902
1903                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1904
1905                 if (i == params->wep_tx_keyidx)
1906                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1907
1908                 nla_nest_end(msg, nl_key);
1909         }
1910         nla_nest_end(msg, nl_keys);
1911
1912         return 0;
1913
1914 nla_put_failure:
1915         return -ENOBUFS;
1916 }
1917
1918
1919 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1920                                       const u8 *addr, int key_idx,
1921                                       int set_tx, const u8 *seq,
1922                                       size_t seq_len,
1923                                       const u8 *key, size_t key_len)
1924 {
1925         struct wpa_driver_nl80211_data *drv = priv;
1926         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1927                            seq_len, key, key_len);
1928 }
1929
1930
1931 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1932                                    const u8 *addr, int cmd, u16 reason_code)
1933 {
1934         int ret = -1;
1935         struct nl_msg *msg;
1936
1937         msg = nlmsg_alloc();
1938         if (!msg)
1939                 return -1;
1940
1941         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1942
1943         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1944         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1945         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1946
1947         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1948         msg = NULL;
1949         if (ret) {
1950                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1951                            "(%s)", ret, strerror(-ret));
1952                 goto nla_put_failure;
1953         }
1954         ret = 0;
1955
1956 nla_put_failure:
1957         nlmsg_free(msg);
1958         return ret;
1959 }
1960
1961
1962 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
1963                                          const u8 *addr, int reason_code)
1964 {
1965         wpa_printf(MSG_DEBUG, "%s", __func__);
1966         drv->associated = 0;
1967         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
1968                                        reason_code);
1969 }
1970
1971
1972 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1973                                              int reason_code)
1974 {
1975         struct wpa_driver_nl80211_data *drv = priv;
1976         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1977                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1978         wpa_printf(MSG_DEBUG, "%s", __func__);
1979         drv->associated = 0;
1980         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1981                                        reason_code);
1982 }
1983
1984
1985 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1986                                            int reason_code)
1987 {
1988         struct wpa_driver_nl80211_data *drv = priv;
1989         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1990                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1991         wpa_printf(MSG_DEBUG, "%s", __func__);
1992         drv->associated = 0;
1993         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1994                                        reason_code);
1995 }
1996
1997
1998 static int wpa_driver_nl80211_authenticate(
1999         void *priv, struct wpa_driver_auth_params *params)
2000 {
2001         struct wpa_driver_nl80211_data *drv = priv;
2002         int ret = -1, i;
2003         struct nl_msg *msg;
2004         enum nl80211_auth_type type;
2005
2006         drv->associated = 0;
2007
2008         msg = nlmsg_alloc();
2009         if (!msg)
2010                 return -1;
2011
2012         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2013                    drv->ifindex);
2014
2015         for (i = 0; i < 4; i++) {
2016                 if (!params->wep_key[i])
2017                         continue;
2018                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
2019                                            i == params->wep_tx_keyidx, NULL, 0,
2020                                            params->wep_key[i],
2021                                            params->wep_key_len[i]);
2022         }
2023
2024         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2025                     NL80211_CMD_AUTHENTICATE, 0);
2026
2027         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2028         if (params->bssid) {
2029                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2030                            MAC2STR(params->bssid));
2031                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2032         }
2033         if (params->freq) {
2034                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2035                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2036         }
2037         if (params->ssid) {
2038                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2039                                   params->ssid, params->ssid_len);
2040                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2041                         params->ssid);
2042         }
2043         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2044         if (params->ie)
2045                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2046         /*
2047          * TODO: if multiple auth_alg options enabled, try them one by one if
2048          * the AP rejects authentication due to unknown auth alg
2049          */
2050         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2051                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2052         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2053                 type = NL80211_AUTHTYPE_SHARED_KEY;
2054         else if (params->auth_alg & AUTH_ALG_LEAP)
2055                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2056         else if (params->auth_alg & AUTH_ALG_FT)
2057                 type = NL80211_AUTHTYPE_FT;
2058         else
2059                 goto nla_put_failure;
2060         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2061         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2062
2063         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2064         msg = NULL;
2065         if (ret) {
2066                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2067                            "(%s)", ret, strerror(-ret));
2068                 goto nla_put_failure;
2069         }
2070         ret = 0;
2071         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2072                    "successfully");
2073
2074 nla_put_failure:
2075         nlmsg_free(msg);
2076         return ret;
2077 }
2078
2079 #endif /* HOSTAPD */
2080
2081
2082 #if defined(CONFIG_AP) || defined(HOSTAPD)
2083
2084 struct phy_info_arg {
2085         u16 *num_modes;
2086         struct hostapd_hw_modes *modes;
2087 };
2088
2089 static int phy_info_handler(struct nl_msg *msg, void *arg)
2090 {
2091         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2092         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2093         struct phy_info_arg *phy_info = arg;
2094
2095         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2096
2097         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2098         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2099                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2100                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2101                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2102                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2103                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2104                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2105         };
2106
2107         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2108         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2109                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2110                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2111         };
2112
2113         struct nlattr *nl_band;
2114         struct nlattr *nl_freq;
2115         struct nlattr *nl_rate;
2116         int rem_band, rem_freq, rem_rate;
2117         struct hostapd_hw_modes *mode;
2118         int idx, mode_is_set;
2119
2120         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2121                   genlmsg_attrlen(gnlh, 0), NULL);
2122
2123         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2124                 return NL_SKIP;
2125
2126         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2127                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2128                 if (!mode)
2129                         return NL_SKIP;
2130                 phy_info->modes = mode;
2131
2132                 mode_is_set = 0;
2133
2134                 mode = &phy_info->modes[*(phy_info->num_modes)];
2135                 memset(mode, 0, sizeof(*mode));
2136                 *(phy_info->num_modes) += 1;
2137
2138                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2139                           nla_len(nl_band), NULL);
2140
2141                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2142                         mode->ht_capab = nla_get_u16(
2143                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2144                 }
2145
2146                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2147                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2148                                   nla_len(nl_freq), freq_policy);
2149                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2150                                 continue;
2151                         mode->num_channels++;
2152                 }
2153
2154                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
2155                 if (!mode->channels)
2156                         return NL_SKIP;
2157
2158                 idx = 0;
2159
2160                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2161                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2162                                   nla_len(nl_freq), freq_policy);
2163                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2164                                 continue;
2165
2166                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2167                         mode->channels[idx].flag = 0;
2168
2169                         if (!mode_is_set) {
2170                                 /* crude heuristic */
2171                                 if (mode->channels[idx].freq < 4000)
2172                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2173                                 else
2174                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2175                                 mode_is_set = 1;
2176                         }
2177
2178                         /* crude heuristic */
2179                         if (mode->channels[idx].freq < 4000)
2180                                 if (mode->channels[idx].freq == 2484)
2181                                         mode->channels[idx].chan = 14;
2182                                 else
2183                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2184                         else
2185                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2186
2187                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2188                                 mode->channels[idx].flag |=
2189                                         HOSTAPD_CHAN_DISABLED;
2190                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2191                                 mode->channels[idx].flag |=
2192                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2193                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2194                                 mode->channels[idx].flag |=
2195                                         HOSTAPD_CHAN_NO_IBSS;
2196                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2197                                 mode->channels[idx].flag |=
2198                                         HOSTAPD_CHAN_RADAR;
2199
2200                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2201                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2202                                 mode->channels[idx].max_tx_power =
2203                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2204
2205                         idx++;
2206                 }
2207
2208                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2209                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2210                                   nla_len(nl_rate), rate_policy);
2211                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2212                                 continue;
2213                         mode->num_rates++;
2214                 }
2215
2216                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
2217                 if (!mode->rates)
2218                         return NL_SKIP;
2219
2220                 idx = 0;
2221
2222                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2223                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2224                                   nla_len(nl_rate), rate_policy);
2225                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2226                                 continue;
2227                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2228
2229                         /* crude heuristic */
2230                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2231                             mode->rates[idx].rate > 200)
2232                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2233
2234                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2235                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
2236
2237                         idx++;
2238                 }
2239         }
2240
2241         return NL_SKIP;
2242 }
2243
2244 static struct hostapd_hw_modes *
2245 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2246 {
2247         u16 m;
2248         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2249         int i, mode11g_idx = -1;
2250
2251         /* If only 802.11g mode is included, use it to construct matching
2252          * 802.11b mode data. */
2253
2254         for (m = 0; m < *num_modes; m++) {
2255                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2256                         return modes; /* 802.11b already included */
2257                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2258                         mode11g_idx = m;
2259         }
2260
2261         if (mode11g_idx < 0)
2262                 return modes; /* 2.4 GHz band not supported at all */
2263
2264         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2265         if (nmodes == NULL)
2266                 return modes; /* Could not add 802.11b mode */
2267
2268         mode = &nmodes[*num_modes];
2269         os_memset(mode, 0, sizeof(*mode));
2270         (*num_modes)++;
2271         modes = nmodes;
2272
2273         mode->mode = HOSTAPD_MODE_IEEE80211B;
2274
2275         mode11g = &modes[mode11g_idx];
2276         mode->num_channels = mode11g->num_channels;
2277         mode->channels = os_malloc(mode11g->num_channels *
2278                                    sizeof(struct hostapd_channel_data));
2279         if (mode->channels == NULL) {
2280                 (*num_modes)--;
2281                 return modes; /* Could not add 802.11b mode */
2282         }
2283         os_memcpy(mode->channels, mode11g->channels,
2284                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2285
2286         mode->num_rates = 0;
2287         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2288         if (mode->rates == NULL) {
2289                 os_free(mode->channels);
2290                 (*num_modes)--;
2291                 return modes; /* Could not add 802.11b mode */
2292         }
2293
2294         for (i = 0; i < mode11g->num_rates; i++) {
2295                 if (mode11g->rates[i].rate > 110 ||
2296                     mode11g->rates[i].flags &
2297                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2298                         continue;
2299                 mode->rates[mode->num_rates] = mode11g->rates[i];
2300                 mode->num_rates++;
2301                 if (mode->num_rates == 4)
2302                         break;
2303         }
2304
2305         if (mode->num_rates == 0) {
2306                 os_free(mode->channels);
2307                 os_free(mode->rates);
2308                 (*num_modes)--;
2309                 return modes; /* No 802.11b rates */
2310         }
2311
2312         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2313                    "information");
2314
2315         return modes;
2316 }
2317
2318
2319 static struct hostapd_hw_modes *
2320 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2321 {
2322         struct wpa_driver_nl80211_data *drv = priv;
2323         struct nl_msg *msg;
2324         struct phy_info_arg result = {
2325                 .num_modes = num_modes,
2326                 .modes = NULL,
2327         };
2328
2329         *num_modes = 0;
2330         *flags = 0;
2331
2332         msg = nlmsg_alloc();
2333         if (!msg)
2334                 return NULL;
2335
2336         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2337                     0, NL80211_CMD_GET_WIPHY, 0);
2338
2339         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2340
2341         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2342                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2343  nla_put_failure:
2344         return NULL;
2345 }
2346
2347
2348 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2349                                          const void *data, size_t len,
2350                                          int encrypt)
2351 {
2352         __u8 rtap_hdr[] = {
2353                 0x00, 0x00, /* radiotap version */
2354                 0x0e, 0x00, /* radiotap length */
2355                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2356                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2357                 0x00,       /* padding */
2358                 0x00, 0x00, /* RX and TX flags to indicate that */
2359                 0x00, 0x00, /* this is the injected frame directly */
2360         };
2361         struct iovec iov[2] = {
2362                 {
2363                         .iov_base = &rtap_hdr,
2364                         .iov_len = sizeof(rtap_hdr),
2365                 },
2366                 {
2367                         .iov_base = (void *) data,
2368                         .iov_len = len,
2369                 }
2370         };
2371         struct msghdr msg = {
2372                 .msg_name = NULL,
2373                 .msg_namelen = 0,
2374                 .msg_iov = iov,
2375                 .msg_iovlen = 2,
2376                 .msg_control = NULL,
2377                 .msg_controllen = 0,
2378                 .msg_flags = 0,
2379         };
2380
2381         if (encrypt)
2382                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2383
2384         return sendmsg(drv->monitor_sock, &msg, 0);
2385 }
2386
2387
2388 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2389                                         size_t data_len)
2390 {
2391         struct wpa_driver_nl80211_data *drv = priv;
2392         struct ieee80211_mgmt *mgmt;
2393         int encrypt = 1;
2394         u16 fc;
2395
2396         mgmt = (struct ieee80211_mgmt *) data;
2397         fc = le_to_host16(mgmt->frame_control);
2398
2399         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2400             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2401                 /*
2402                  * Only one of the authentication frame types is encrypted.
2403                  * In order for static WEP encryption to work properly (i.e.,
2404                  * to not encrypt the frame), we need to tell mac80211 about
2405                  * the frames that must not be encrypted.
2406                  */
2407                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2408                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2409                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2410                         encrypt = 0;
2411         }
2412
2413         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2414 }
2415
2416
2417 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2418                                                const u8 *head, size_t head_len,
2419                                                const u8 *tail, size_t tail_len,
2420                                                int dtim_period)
2421 {
2422         struct wpa_driver_nl80211_data *drv = priv;
2423         struct nl_msg *msg;
2424         u8 cmd = NL80211_CMD_NEW_BEACON;
2425         int ret;
2426         int beacon_set;
2427 #ifdef HOSTAPD
2428         struct i802_bss *bss;
2429
2430         bss = get_bss(drv, ifindex);
2431         if (bss == NULL)
2432                 return -ENOENT;
2433         beacon_set = bss->beacon_set;
2434 #else /* HOSTAPD */
2435         beacon_set = drv->beacon_set;
2436 #endif /* HOSTAPD */
2437
2438         msg = nlmsg_alloc();
2439         if (!msg)
2440                 return -ENOMEM;
2441
2442         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2443                    beacon_set);
2444         if (beacon_set)
2445                 cmd = NL80211_CMD_SET_BEACON;
2446
2447         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2448                     0, cmd, 0);
2449         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2450         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2451         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2452         if (!drv->beacon_int)
2453                 drv->beacon_int = 100;
2454         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2455         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2456
2457         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2458         if (ret) {
2459                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2460                            ret, strerror(-ret));
2461         } else {
2462 #ifdef HOSTAPD
2463                 bss->beacon_set = 1;
2464 #else /* HOSTAPD */
2465                 drv->beacon_set = 1;
2466 #endif /* HOSTAPD */
2467         }
2468         return ret;
2469  nla_put_failure:
2470         return -ENOBUFS;
2471 }
2472
2473
2474 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2475 {
2476         struct wpa_driver_nl80211_data *drv = priv;
2477         struct nl_msg *msg;
2478
2479         drv->beacon_int = value;
2480
2481 #ifdef HOSTAPD
2482         if (!drv->bss.beacon_set)
2483                 return 0;
2484 #else /* HOSTAPD */
2485         if (!drv->beacon_set)
2486                 return 0;
2487 #endif /* HOSTAPD */
2488
2489         msg = nlmsg_alloc();
2490         if (!msg)
2491                 return -ENOMEM;
2492
2493         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2494         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2495                     0, NL80211_CMD_SET_BEACON, 0);
2496         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2497
2498         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2499
2500         return send_and_recv_msgs(drv, msg, NULL, NULL);
2501  nla_put_failure:
2502         return -ENOBUFS;
2503 }
2504
2505
2506 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2507                                        int freq, int ht_enabled,
2508                                        int sec_channel_offset)
2509 {
2510         struct nl_msg *msg;
2511         int ret;
2512
2513         msg = nlmsg_alloc();
2514         if (!msg)
2515                 return -1;
2516
2517         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2518                     NL80211_CMD_SET_WIPHY, 0);
2519
2520         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2521         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2522         if (ht_enabled) {
2523                 switch (sec_channel_offset) {
2524                 case -1:
2525                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2526                                     NL80211_CHAN_HT40MINUS);
2527                         break;
2528                 case 1:
2529                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2530                                     NL80211_CHAN_HT40PLUS);
2531                         break;
2532                 default:
2533                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2534                                     NL80211_CHAN_HT20);
2535                         break;
2536                 }
2537         }
2538
2539         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2540         if (ret == 0)
2541                 return 0;
2542         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2543                    "%d (%s)", freq, ret, strerror(-ret));
2544 nla_put_failure:
2545         return -1;
2546 }
2547
2548
2549 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2550                                       struct hostapd_sta_add_params *params)
2551 {
2552         struct wpa_driver_nl80211_data *drv = priv;
2553         struct nl_msg *msg;
2554         int ret = -ENOBUFS;
2555
2556         msg = nlmsg_alloc();
2557         if (!msg)
2558                 return -ENOMEM;
2559
2560         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2561                     0, NL80211_CMD_NEW_STATION, 0);
2562
2563         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2564         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2565         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2566         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2567                 params->supp_rates);
2568         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2569                     params->listen_interval);
2570
2571 #ifdef CONFIG_IEEE80211N
2572         if (params->ht_capabilities) {
2573                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2574                         params->ht_capabilities->length,
2575                         &params->ht_capabilities->data);
2576         }
2577 #endif /* CONFIG_IEEE80211N */
2578
2579         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2580         if (ret)
2581                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2582                            "result: %d (%s)", ret, strerror(-ret));
2583         if (ret == -EEXIST)
2584                 ret = 0;
2585  nla_put_failure:
2586         return ret;
2587 }
2588
2589
2590 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2591 {
2592         struct wpa_driver_nl80211_data *drv = priv;
2593         struct nl_msg *msg;
2594         int ret;
2595
2596         msg = nlmsg_alloc();
2597         if (!msg)
2598                 return -ENOMEM;
2599
2600         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2601                     0, NL80211_CMD_DEL_STATION, 0);
2602
2603         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2604                     if_nametoindex(drv->ifname));
2605         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2606
2607         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2608         if (ret == -ENOENT)
2609                 return 0;
2610         return ret;
2611  nla_put_failure:
2612         return -ENOBUFS;
2613 }
2614
2615 #endif /* CONFIG_AP || HOSTAPD */
2616
2617
2618 #ifdef CONFIG_AP
2619
2620 static int wpa_driver_nl80211_set_beacon(void *priv,
2621                                          const u8 *head, size_t head_len,
2622                                          const u8 *tail, size_t tail_len,
2623                                          int dtim_period)
2624 {
2625         struct wpa_driver_nl80211_data *drv = priv;
2626         return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2627                                                    head, head_len,
2628                                                    tail, tail_len,
2629                                                    dtim_period);
2630 }
2631
2632 #endif /* CONFIG_AP */
2633
2634 #if defined(CONFIG_AP) || defined(HOSTAPD)
2635
2636 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2637                                  int ifidx)
2638 {
2639         struct nl_msg *msg;
2640
2641 #ifdef HOSTAPD
2642         /* stop listening for EAPOL on this interface */
2643         del_ifidx(drv, ifidx);
2644 #endif /* HOSTAPD */
2645
2646         msg = nlmsg_alloc();
2647         if (!msg)
2648                 goto nla_put_failure;
2649
2650         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2651                     0, NL80211_CMD_DEL_INTERFACE, 0);
2652         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2653
2654         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2655                 return;
2656  nla_put_failure:
2657         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2658                    ifidx);
2659 }
2660
2661
2662 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2663                                      const char *ifname,
2664                                      enum nl80211_iftype iftype,
2665                                      const u8 *addr)
2666 {
2667         struct nl_msg *msg, *flags = NULL;
2668         int ifidx;
2669         int ret = -ENOBUFS;
2670
2671         msg = nlmsg_alloc();
2672         if (!msg)
2673                 return -1;
2674
2675         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2676                     0, NL80211_CMD_NEW_INTERFACE, 0);
2677         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2678         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2679         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2680
2681         if (iftype == NL80211_IFTYPE_MONITOR) {
2682                 int err;
2683
2684                 flags = nlmsg_alloc();
2685                 if (!flags)
2686                         goto nla_put_failure;
2687
2688                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2689
2690                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2691
2692                 nlmsg_free(flags);
2693
2694                 if (err)
2695                         goto nla_put_failure;
2696         }
2697
2698         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2699         if (ret) {
2700  nla_put_failure:
2701                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2702                            ifname, ret, strerror(-ret));
2703                 return ret;
2704         }
2705
2706         ifidx = if_nametoindex(ifname);
2707
2708         if (ifidx <= 0)
2709                 return -1;
2710
2711 #ifdef HOSTAPD
2712         /* start listening for EAPOL on this interface */
2713         add_ifidx(drv, ifidx);
2714
2715         if (addr && iftype == NL80211_IFTYPE_AP &&
2716             set_ifhwaddr(drv, ifname, addr)) {
2717                 nl80211_remove_iface(drv, ifidx);
2718                 return -1;
2719         }
2720 #endif /* HOSTAPD */
2721
2722         return ifidx;
2723 }
2724 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2725                                 const char *ifname, enum nl80211_iftype iftype,
2726                                 const u8 *addr)
2727 {
2728         int ret;
2729
2730         ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2731
2732         /* if error occured and interface exists already */
2733         if (ret == -ENFILE && if_nametoindex(ifname)) {
2734                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2735
2736                 /* Try to remove the interface that was already there. */
2737                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2738
2739                 /* Try to create the interface again */
2740                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2741         }
2742
2743         return ret;
2744 }
2745
2746 #endif /* CONFIG_AP || HOSTAPD */
2747
2748 #ifdef CONFIG_AP
2749
2750 void ap_tx_status(void *ctx, const u8 *addr,
2751                   const u8 *buf, size_t len, int ack);
2752 void ap_rx_from_unknown_sta(void *ctx, struct ieee80211_hdr *hdr, size_t len);
2753 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2754                 struct hostapd_frame_info *fi);
2755 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2756
2757 #endif /* CONFIG_AP */
2758
2759 #if defined(CONFIG_AP) || defined(HOSTAPD)
2760
2761 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2762 {
2763         struct ieee80211_hdr *hdr;
2764         u16 fc, type, stype;
2765
2766         hdr = (struct ieee80211_hdr *) buf;
2767         fc = le_to_host16(hdr->frame_control);
2768
2769         type = WLAN_FC_GET_TYPE(fc);
2770         stype = WLAN_FC_GET_STYPE(fc);
2771
2772         switch (type) {
2773         case WLAN_FC_TYPE_MGMT:
2774                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2775                            ok ? "ACK" : "fail");
2776 #ifdef HOSTAPD
2777                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2778 #else /* HOSTAPD */
2779                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2780 #endif /* HOSTAPD */
2781                 break;
2782         case WLAN_FC_TYPE_CTRL:
2783                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2784                            ok ? "ACK" : "fail");
2785                 break;
2786         case WLAN_FC_TYPE_DATA:
2787 #ifdef HOSTAPD
2788                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2789 #else /* HOSTAPD */
2790                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2791 #endif /* HOSTAPD */
2792                 break;
2793         default:
2794                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2795                            type);
2796                 break;
2797         }
2798 }
2799
2800
2801 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2802                              struct ieee80211_hdr *hdr, size_t len)
2803 {
2804 #ifdef HOSTAPD
2805         hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2806 #else /* HOSTAPD */
2807         ap_rx_from_unknown_sta(drv->ctx, hdr, len);
2808 #endif /* HOSTAPD */
2809 }
2810
2811
2812 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2813                          u8 *buf, size_t len,
2814                          struct hostapd_frame_info *hfi)
2815 {
2816         struct ieee80211_hdr *hdr;
2817         u16 fc, stype;
2818
2819         hdr = (struct ieee80211_hdr *) buf;
2820         fc = le_to_host16(hdr->frame_control);
2821         stype = WLAN_FC_GET_STYPE(fc);
2822
2823         switch (WLAN_FC_GET_TYPE(fc)) {
2824         case WLAN_FC_TYPE_MGMT:
2825                 if (stype != WLAN_FC_STYPE_BEACON &&
2826                     stype != WLAN_FC_STYPE_PROBE_REQ)
2827                         wpa_printf(MSG_MSGDUMP, "MGMT");
2828 #ifdef HOSTAPD
2829                 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2830 #else /* HOSTAPD */
2831                 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2832 #endif /* HOSTAPD */
2833                 break;
2834         case WLAN_FC_TYPE_CTRL:
2835                 /* can only get here with PS-Poll frames */
2836                 wpa_printf(MSG_DEBUG, "CTRL");
2837                 from_unknown_sta(drv, hdr, len);
2838                 break;
2839         case WLAN_FC_TYPE_DATA:
2840                 from_unknown_sta(drv, hdr, len);
2841                 break;
2842         }
2843 }
2844
2845
2846 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2847 {
2848         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2849         int len;
2850         unsigned char buf[3000];
2851         struct ieee80211_radiotap_iterator iter;
2852         int ret;
2853         struct hostapd_frame_info hfi;
2854         int injected = 0, failed = 0, rxflags = 0;
2855
2856         len = recv(sock, buf, sizeof(buf), 0);
2857         if (len < 0) {
2858                 perror("recv");
2859                 return;
2860         }
2861
2862         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2863                 printf("received invalid radiotap frame\n");
2864                 return;
2865         }
2866
2867         memset(&hfi, 0, sizeof(hfi));
2868
2869         while (1) {
2870                 ret = ieee80211_radiotap_iterator_next(&iter);
2871                 if (ret == -ENOENT)
2872                         break;
2873                 if (ret) {
2874                         printf("received invalid radiotap frame (%d)\n", ret);
2875                         return;
2876                 }
2877                 switch (iter.this_arg_index) {
2878                 case IEEE80211_RADIOTAP_FLAGS:
2879                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2880                                 len -= 4;
2881                         break;
2882                 case IEEE80211_RADIOTAP_RX_FLAGS:
2883                         rxflags = 1;
2884                         break;
2885                 case IEEE80211_RADIOTAP_TX_FLAGS:
2886                         injected = 1;
2887                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2888                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2889                         break;
2890                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2891                         break;
2892                 case IEEE80211_RADIOTAP_CHANNEL:
2893                         /* TODO convert from freq/flags to channel number
2894                         hfi.channel = XXX;
2895                         hfi.phytype = XXX;
2896                          */
2897                         break;
2898                 case IEEE80211_RADIOTAP_RATE:
2899                         hfi.datarate = *iter.this_arg * 5;
2900                         break;
2901                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2902                         hfi.ssi_signal = *iter.this_arg;
2903                         break;
2904                 }
2905         }
2906
2907         if (rxflags && injected)
2908                 return;
2909
2910         if (!injected)
2911                 handle_frame(drv, buf + iter.max_length,
2912                              len - iter.max_length, &hfi);
2913         else
2914                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2915                                    len - iter.max_length, !failed);
2916 }
2917
2918
2919 /*
2920  * we post-process the filter code later and rewrite
2921  * this to the offset to the last instruction
2922  */
2923 #define PASS    0xFF
2924 #define FAIL    0xFE
2925
2926 static struct sock_filter msock_filter_insns[] = {
2927         /*
2928          * do a little-endian load of the radiotap length field
2929          */
2930         /* load lower byte into A */
2931         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2932         /* put it into X (== index register) */
2933         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2934         /* load upper byte into A */
2935         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2936         /* left-shift it by 8 */
2937         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2938         /* or with X */
2939         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2940         /* put result into X */
2941         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2942
2943         /*
2944          * Allow management frames through, this also gives us those
2945          * management frames that we sent ourselves with status
2946          */
2947         /* load the lower byte of the IEEE 802.11 frame control field */
2948         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2949         /* mask off frame type and version */
2950         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2951         /* accept frame if it's both 0, fall through otherwise */
2952         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2953
2954         /*
2955          * TODO: add a bit to radiotap RX flags that indicates
2956          * that the sending station is not associated, then
2957          * add a filter here that filters on our DA and that flag
2958          * to allow us to deauth frames to that bad station.
2959          *
2960          * Not a regression -- we didn't do it before either.
2961          */
2962
2963 #if 0
2964         /*
2965          * drop non-data frames, WDS frames
2966          */
2967         /* load the lower byte of the frame control field */
2968         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2969         /* mask off QoS bit */
2970         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2971         /* drop non-data frames */
2972         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2973         /* load the upper byte of the frame control field */
2974         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2975         /* mask off toDS/fromDS */
2976         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2977         /* drop WDS frames */
2978         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2979 #endif
2980
2981         /*
2982          * add header length to index
2983          */
2984         /* load the lower byte of the frame control field */
2985         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2986         /* mask off QoS bit */
2987         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2988         /* right shift it by 6 to give 0 or 2 */
2989         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2990         /* add data frame header length */
2991         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2992         /* add index, was start of 802.11 header */
2993         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2994         /* move to index, now start of LL header */
2995         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2996
2997         /*
2998          * Accept empty data frames, we use those for
2999          * polling activity.
3000          */
3001         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3002         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3003
3004         /*
3005          * Accept EAPOL frames
3006          */
3007         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3008         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3009         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3010         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3011
3012         /* keep these last two statements or change the code below */
3013         /* return 0 == "DROP" */
3014         BPF_STMT(BPF_RET | BPF_K, 0),
3015         /* return ~0 == "keep all" */
3016         BPF_STMT(BPF_RET | BPF_K, ~0),
3017 };
3018
3019 static struct sock_fprog msock_filter = {
3020         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3021         .filter = msock_filter_insns,
3022 };
3023
3024
3025 static int add_monitor_filter(int s)
3026 {
3027         int idx;
3028
3029         /* rewrite all PASS/FAIL jump offsets */
3030         for (idx = 0; idx < msock_filter.len; idx++) {
3031                 struct sock_filter *insn = &msock_filter_insns[idx];
3032
3033                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3034                         if (insn->code == (BPF_JMP|BPF_JA)) {
3035                                 if (insn->k == PASS)
3036                                         insn->k = msock_filter.len - idx - 2;
3037                                 else if (insn->k == FAIL)
3038                                         insn->k = msock_filter.len - idx - 3;
3039                         }
3040
3041                         if (insn->jt == PASS)
3042                                 insn->jt = msock_filter.len - idx - 2;
3043                         else if (insn->jt == FAIL)
3044                                 insn->jt = msock_filter.len - idx - 3;
3045
3046                         if (insn->jf == PASS)
3047                                 insn->jf = msock_filter.len - idx - 2;
3048                         else if (insn->jf == FAIL)
3049                                 insn->jf = msock_filter.len - idx - 3;
3050                 }
3051         }
3052
3053         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3054                        &msock_filter, sizeof(msock_filter))) {
3055                 perror("SO_ATTACH_FILTER");
3056                 return -1;
3057         }
3058
3059         return 0;
3060 }
3061
3062
3063 static void nl80211_remove_monitor_interface(
3064         struct wpa_driver_nl80211_data *drv)
3065 {
3066         if (drv->monitor_ifidx >= 0) {
3067                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3068                 drv->monitor_ifidx = -1;
3069         }
3070 }
3071
3072
3073 static int
3074 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3075 {
3076         char buf[IFNAMSIZ];
3077         struct sockaddr_ll ll;
3078         int optval;
3079         socklen_t optlen;
3080
3081         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3082         buf[IFNAMSIZ - 1] = '\0';
3083
3084         drv->monitor_ifidx =
3085                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
3086
3087         if (drv->monitor_ifidx < 0)
3088                 return -1;
3089
3090         if (hostapd_set_iface_flags(drv, buf, 1))
3091                 goto error;
3092
3093         memset(&ll, 0, sizeof(ll));
3094         ll.sll_family = AF_PACKET;
3095         ll.sll_ifindex = drv->monitor_ifidx;
3096         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3097         if (drv->monitor_sock < 0) {
3098                 perror("socket[PF_PACKET,SOCK_RAW]");
3099                 goto error;
3100         }
3101
3102         if (add_monitor_filter(drv->monitor_sock)) {
3103                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3104                            "interface; do filtering in user space");
3105                 /* This works, but will cost in performance. */
3106         }
3107
3108         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3109                 perror("monitor socket bind");
3110                 goto error;
3111         }
3112
3113         optlen = sizeof(optval);
3114         optval = 20;
3115         if (setsockopt
3116             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3117                 perror("Failed to set socket priority");
3118                 goto error;
3119         }
3120
3121         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3122                                      drv, NULL)) {
3123                 printf("Could not register monitor read socket\n");
3124                 goto error;
3125         }
3126
3127         return 0;
3128  error:
3129         nl80211_remove_monitor_interface(drv);
3130         return -1;
3131 }
3132
3133
3134 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3135
3136 static int wpa_driver_nl80211_hapd_send_eapol(
3137         void *priv, const u8 *addr, const u8 *data,
3138         size_t data_len, int encrypt, const u8 *own_addr)
3139 {
3140         struct wpa_driver_nl80211_data *drv = priv;
3141         struct ieee80211_hdr *hdr;
3142         size_t len;
3143         u8 *pos;
3144         int res;
3145 #if 0 /* FIX */
3146         int qos = sta->flags & WLAN_STA_WME;
3147 #else
3148         int qos = 0;
3149 #endif
3150
3151         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3152                 data_len;
3153         hdr = os_zalloc(len);
3154         if (hdr == NULL) {
3155                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3156                        (unsigned long) len);
3157                 return -1;
3158         }
3159
3160         hdr->frame_control =
3161                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3162         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3163         if (encrypt)
3164                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3165 #if 0 /* To be enabled if qos determination is added above */
3166         if (qos) {
3167                 hdr->frame_control |=
3168                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3169         }
3170 #endif
3171
3172         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3173         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3174         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3175         pos = (u8 *) (hdr + 1);
3176
3177 #if 0 /* To be enabled if qos determination is added above */
3178         if (qos) {
3179                 /* add an empty QoS header if needed */
3180                 pos[0] = 0;
3181                 pos[1] = 0;
3182                 pos += 2;
3183         }
3184 #endif
3185
3186         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3187         pos += sizeof(rfc1042_header);
3188         WPA_PUT_BE16(pos, ETH_P_PAE);
3189         pos += 2;
3190         memcpy(pos, data, data_len);
3191
3192         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3193         if (res < 0) {
3194                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3195                            "failed: %d (%s)",
3196                            (unsigned long) len, errno, strerror(errno));
3197         }
3198         free(hdr);
3199
3200         return res;
3201 }
3202
3203
3204 static u32 sta_flags_nl80211(int flags)
3205 {
3206         u32 f = 0;
3207
3208         if (flags & WLAN_STA_AUTHORIZED)
3209                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3210         if (flags & WLAN_STA_WMM)
3211                 f |= BIT(NL80211_STA_FLAG_WME);
3212         if (flags & WLAN_STA_SHORT_PREAMBLE)
3213                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3214         if (flags & WLAN_STA_MFP)
3215                 f |= BIT(NL80211_STA_FLAG_MFP);
3216
3217         return f;
3218 }
3219
3220
3221 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3222                                             int total_flags, int flags_or,
3223                                             int flags_and)
3224 {
3225         struct wpa_driver_nl80211_data *drv = priv;
3226         struct nl_msg *msg, *flags = NULL;
3227         struct nl80211_sta_flag_update upd;
3228
3229         msg = nlmsg_alloc();
3230         if (!msg)
3231                 return -ENOMEM;
3232
3233         flags = nlmsg_alloc();
3234         if (!flags) {
3235                 nlmsg_free(msg);
3236                 return -ENOMEM;
3237         }
3238
3239         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3240                     0, NL80211_CMD_SET_STATION, 0);
3241
3242         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3243                     if_nametoindex(drv->ifname));
3244         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3245
3246         /*
3247          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3248          * can be removed eventually.
3249          */
3250         if (total_flags & WLAN_STA_AUTHORIZED)
3251                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3252
3253         if (total_flags & WLAN_STA_WMM)
3254                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3255
3256         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3257                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3258
3259         if (total_flags & WLAN_STA_MFP)
3260                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3261
3262         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3263                 goto nla_put_failure;
3264
3265         os_memset(&upd, 0, sizeof(upd));
3266         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3267         upd.set = sta_flags_nl80211(flags_or);
3268         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3269
3270         nlmsg_free(flags);
3271
3272         return send_and_recv_msgs(drv, msg, NULL, NULL);
3273  nla_put_failure:
3274         nlmsg_free(flags);
3275         return -ENOBUFS;
3276 }
3277
3278 #endif /* CONFIG_AP || HOSTAPD */
3279
3280 #ifdef CONFIG_AP
3281
3282 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3283                                  struct wpa_driver_associate_params *params)
3284 {
3285         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3286             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3287                 nl80211_remove_monitor_interface(drv);
3288                 return -1;
3289         }
3290
3291         /* TODO: setup monitor interface (and add code somewhere to remove this
3292          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3293
3294         return 0;
3295 }
3296 #endif /* CONFIG_AP */
3297
3298
3299 #ifndef HOSTAPD
3300 static int wpa_driver_nl80211_connect(
3301         struct wpa_driver_nl80211_data *drv,
3302         struct wpa_driver_associate_params *params)
3303 {
3304         struct nl_msg *msg;
3305         enum nl80211_auth_type type;
3306         int ret = 0;
3307
3308         msg = nlmsg_alloc();
3309         if (!msg)
3310                 return -1;
3311
3312         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3313         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3314                     NL80211_CMD_CONNECT, 0);
3315
3316         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3317         if (params->bssid) {
3318                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3319                            MAC2STR(params->bssid));
3320                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3321         }
3322         if (params->freq) {
3323                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3324                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3325         }
3326         if (params->ssid) {
3327                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3328                                   params->ssid, params->ssid_len);
3329                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3330                         params->ssid);
3331                 if (params->ssid_len > sizeof(drv->ssid))
3332                         goto nla_put_failure;
3333                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3334                 drv->ssid_len = params->ssid_len;
3335         }
3336         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3337         if (params->wpa_ie)
3338                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3339                         params->wpa_ie);
3340
3341         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3342                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3343         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3344                 type = NL80211_AUTHTYPE_SHARED_KEY;
3345         else if (params->auth_alg & AUTH_ALG_LEAP)
3346                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3347         else if (params->auth_alg & AUTH_ALG_FT)
3348                 type = NL80211_AUTHTYPE_FT;
3349         else
3350                 goto nla_put_failure;
3351
3352         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3353         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3354
3355         if (params->wpa_ie && params->wpa_ie_len) {
3356                 enum nl80211_wpa_versions ver;
3357
3358                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3359                         ver = NL80211_WPA_VERSION_2;
3360                 else
3361                         ver = NL80211_WPA_VERSION_1;
3362
3363                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3364                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3365         }
3366
3367         if (params->pairwise_suite != CIPHER_NONE) {
3368                 int cipher = IW_AUTH_CIPHER_NONE;
3369
3370                 switch (params->pairwise_suite) {
3371                 case CIPHER_WEP40:
3372                         cipher = WLAN_CIPHER_SUITE_WEP40;
3373                         break;
3374                 case CIPHER_WEP104:
3375                         cipher = WLAN_CIPHER_SUITE_WEP104;
3376                         break;
3377                 case CIPHER_CCMP:
3378                         cipher = WLAN_CIPHER_SUITE_CCMP;
3379                         break;
3380                 case CIPHER_TKIP:
3381                 default:
3382                         cipher = WLAN_CIPHER_SUITE_TKIP;
3383                         break;
3384                 }
3385                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3386         }
3387
3388         if (params->group_suite != CIPHER_NONE) {
3389                 int cipher = IW_AUTH_CIPHER_NONE;
3390
3391                 switch (params->group_suite) {
3392                 case CIPHER_WEP40:
3393                         cipher = WLAN_CIPHER_SUITE_WEP40;
3394                         break;
3395                 case CIPHER_WEP104:
3396                         cipher = WLAN_CIPHER_SUITE_WEP104;
3397                         break;
3398                 case CIPHER_CCMP:
3399                         cipher = WLAN_CIPHER_SUITE_CCMP;
3400                         break;
3401                 case CIPHER_TKIP:
3402                 default:
3403                         cipher = WLAN_CIPHER_SUITE_TKIP;
3404                         break;
3405                 }
3406                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3407         }
3408
3409         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3410             params->key_mgmt_suite == KEY_MGMT_PSK) {
3411                 int mgmt = WLAN_AKM_SUITE_PSK;
3412
3413                 switch (params->key_mgmt_suite) {
3414                 case KEY_MGMT_802_1X:
3415                         mgmt = WLAN_AKM_SUITE_8021X;
3416                         break;
3417                 case KEY_MGMT_PSK:
3418                 default:
3419                         mgmt = WLAN_AKM_SUITE_PSK;
3420                         break;
3421                 }
3422                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3423         }
3424
3425         ret = nl80211_set_conn_keys(params, msg);
3426         if (ret)
3427                 goto nla_put_failure;
3428
3429         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3430         msg = NULL;
3431         if (ret) {
3432                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3433                            "(%s)", ret, strerror(-ret));
3434                 goto nla_put_failure;
3435         }
3436         ret = 0;
3437         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3438
3439 nla_put_failure:
3440         nlmsg_free(msg);
3441         return ret;
3442
3443 }
3444
3445
3446 static int wpa_driver_nl80211_associate(
3447         void *priv, struct wpa_driver_associate_params *params)
3448 {
3449         struct wpa_driver_nl80211_data *drv = priv;
3450         int ret = -1;
3451         struct nl_msg *msg;
3452
3453 #ifdef CONFIG_AP
3454         if (params->mode == 2)
3455                 return wpa_driver_nl80211_ap(drv, params);
3456 #endif /* CONFIG_AP */
3457
3458         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
3459                 return wpa_driver_nl80211_connect(drv, params);
3460
3461 #ifndef NO_WEXT
3462         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
3463                                           params->drop_unencrypted);
3464 #endif /* NO_WEXT */
3465
3466         drv->associated = 0;
3467
3468         msg = nlmsg_alloc();
3469         if (!msg)
3470                 return -1;
3471
3472         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3473                    drv->ifindex);
3474         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3475                     NL80211_CMD_ASSOCIATE, 0);
3476
3477         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3478         if (params->bssid) {
3479                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3480                            MAC2STR(params->bssid));
3481                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3482         }
3483         if (params->freq) {
3484                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3485                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3486         }
3487         if (params->ssid) {
3488                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3489                                   params->ssid, params->ssid_len);
3490                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3491                         params->ssid);
3492                 if (params->ssid_len > sizeof(drv->ssid))
3493                         goto nla_put_failure;
3494                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3495                 drv->ssid_len = params->ssid_len;
3496         }
3497         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3498         if (params->wpa_ie)
3499                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3500                         params->wpa_ie);
3501
3502 #ifdef CONFIG_IEEE80211W
3503         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3504                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3505 #endif /* CONFIG_IEEE80211W */
3506
3507         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3508
3509         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3510         msg = NULL;
3511         if (ret) {
3512                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3513                            "(%s)", ret, strerror(-ret));
3514                 goto nla_put_failure;
3515         }
3516         ret = 0;
3517         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3518                    "successfully");
3519
3520 nla_put_failure:
3521         nlmsg_free(msg);
3522         return ret;
3523 }
3524 #endif /* HOSTAPD */
3525
3526
3527 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3528                             int ifindex, int mode)
3529 {
3530         struct nl_msg *msg;
3531         int ret = -ENOBUFS;
3532
3533         msg = nlmsg_alloc();
3534         if (!msg)
3535                 return -ENOMEM;
3536
3537         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3538                     0, NL80211_CMD_SET_INTERFACE, 0);
3539         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3540         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3541
3542         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3543         if (!ret)
3544                 return 0;
3545 nla_put_failure:
3546         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3547                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3548         return ret;
3549 }
3550
3551
3552 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3553 {
3554         struct wpa_driver_nl80211_data *drv = priv;
3555         int ret = -1;
3556         int nlmode;
3557
3558         switch (mode) {
3559         case 0:
3560                 nlmode = NL80211_IFTYPE_STATION;
3561                 break;
3562         case 1:
3563                 nlmode = NL80211_IFTYPE_ADHOC;
3564                 break;
3565         case 2:
3566                 nlmode = NL80211_IFTYPE_AP;
3567                 break;
3568         default:
3569                 return -1;
3570         }
3571
3572         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3573                 drv->nlmode = nlmode;
3574                 ret = 0;
3575                 goto done;
3576         }
3577
3578         if (nlmode == drv->nlmode) {
3579                 ret = 0;
3580                 goto done; /* Already in the requested mode */
3581         }
3582
3583         /* mac80211 doesn't allow mode changes while the device is up, so
3584          * take the device down, try to set the mode again, and bring the
3585          * device back up.
3586          */
3587         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3588                 /* Try to set the mode again while the interface is down */
3589                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3590                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3591                         ret = -1;
3592         }
3593
3594         if (!ret)
3595                 drv->nlmode = nlmode;
3596
3597 done:
3598 #if defined(CONFIG_AP) || defined(HOSTAPD)
3599         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3600                 /* Setup additional AP mode functionality if needed */
3601                 if (drv->monitor_ifidx < 0 &&
3602                     nl80211_create_monitor_interface(drv))
3603                         return -1;
3604         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3605                 /* Remove additional AP mode functionality */
3606                 nl80211_remove_monitor_interface(drv);
3607         }
3608 #endif /* CONFIG_AP || HOSTAPD */
3609
3610         return ret;
3611 }
3612
3613
3614 #ifndef HOSTAPD
3615
3616 static int wpa_driver_nl80211_get_capa(void *priv,
3617                                        struct wpa_driver_capa *capa)
3618 {
3619         struct wpa_driver_nl80211_data *drv = priv;
3620         if (!drv->has_capability)
3621                 return -1;
3622         os_memcpy(capa, &drv->capa, sizeof(*capa));
3623         return 0;
3624 }
3625
3626
3627 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3628 {
3629         struct wpa_driver_nl80211_data *drv = priv;
3630
3631         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3632                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3633         drv->operstate = state;
3634         return wpa_driver_nl80211_send_oper_ifla(
3635                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3636 }
3637
3638
3639 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3640 {
3641         struct wpa_driver_nl80211_data *drv = priv;
3642         struct nl_msg *msg;
3643         struct nl80211_sta_flag_update upd;
3644
3645         msg = nlmsg_alloc();
3646         if (!msg)
3647                 return -ENOMEM;
3648
3649         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3650                     0, NL80211_CMD_SET_STATION, 0);
3651
3652         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3653                     if_nametoindex(drv->ifname));
3654         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3655
3656         os_memset(&upd, 0, sizeof(upd));
3657         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3658         if (authorized)
3659                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3660         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3661
3662         return send_and_recv_msgs(drv, msg, NULL, NULL);
3663  nla_put_failure:
3664         return -ENOBUFS;
3665 }
3666
3667 #endif /* HOSTAPD */
3668
3669
3670 #ifdef HOSTAPD
3671
3672 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3673                                  int ifindex)
3674 {
3675         struct i802_bss *bss = &drv->bss;
3676         while (bss) {
3677                 if (ifindex == bss->ifindex)
3678                         return bss;
3679                 bss = bss->next;
3680         }
3681         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3682         return NULL;
3683 }
3684
3685
3686 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3687 {
3688         int i;
3689         int *old;
3690
3691         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3692                    ifidx);
3693         for (i = 0; i < drv->num_if_indices; i++) {
3694                 if (drv->if_indices[i] == 0) {
3695                         drv->if_indices[i] = ifidx;
3696                         return;
3697                 }
3698         }
3699
3700         if (drv->if_indices != drv->default_if_indices)
3701                 old = drv->if_indices;
3702         else
3703                 old = NULL;
3704
3705         drv->if_indices = realloc(old,
3706                                   sizeof(int) * (drv->num_if_indices + 1));
3707         if (!drv->if_indices) {
3708                 if (!old)
3709                         drv->if_indices = drv->default_if_indices;
3710                 else
3711                         drv->if_indices = old;
3712                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3713                            "interfaces");
3714                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3715                 return;
3716         }
3717         drv->if_indices[drv->num_if_indices] = ifidx;
3718         drv->num_if_indices++;
3719 }
3720
3721
3722 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3723 {
3724         int i;
3725
3726         for (i = 0; i < drv->num_if_indices; i++) {
3727                 if (drv->if_indices[i] == ifidx) {
3728                         drv->if_indices[i] = 0;
3729                         break;
3730                 }
3731         }
3732 }
3733
3734
3735 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3736 {
3737         int i;
3738
3739         for (i = 0; i < drv->num_if_indices; i++)
3740                 if (drv->if_indices[i] == ifidx)
3741                         return 1;
3742
3743         return 0;
3744 }
3745
3746
3747 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3748                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3749                         size_t seq_len, const u8 *key, size_t key_len)
3750 {
3751         struct wpa_driver_nl80211_data *drv = priv;
3752         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3753                            set_tx, seq, seq_len, key, key_len);
3754 }
3755
3756
3757 static inline int min_int(int a, int b)
3758 {
3759         if (a < b)
3760                 return a;
3761         return b;
3762 }
3763
3764
3765 static int get_key_handler(struct nl_msg *msg, void *arg)
3766 {
3767         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3768         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3769
3770         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3771                   genlmsg_attrlen(gnlh, 0), NULL);
3772
3773         /*
3774          * TODO: validate the key index and mac address!
3775          * Otherwise, there's a race condition as soon as
3776          * the kernel starts sending key notifications.
3777          */
3778
3779         if (tb[NL80211_ATTR_KEY_SEQ])
3780                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3781                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3782         return NL_SKIP;
3783 }
3784
3785
3786 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3787                            int idx, u8 *seq)
3788 {
3789         struct wpa_driver_nl80211_data *drv = priv;
3790         struct nl_msg *msg;
3791
3792         msg = nlmsg_alloc();
3793         if (!msg)
3794                 return -ENOMEM;
3795
3796         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3797                     0, NL80211_CMD_GET_KEY, 0);
3798
3799         if (addr)
3800                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3801         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3802         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3803
3804         memset(seq, 0, 6);
3805
3806         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3807  nla_put_failure:
3808         return -ENOBUFS;
3809 }
3810
3811
3812 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3813                               int mode)
3814 {
3815         struct wpa_driver_nl80211_data *drv = priv;
3816         struct nl_msg *msg;
3817         u8 rates[NL80211_MAX_SUPP_RATES];
3818         u8 rates_len = 0;
3819         int i;
3820
3821         msg = nlmsg_alloc();
3822         if (!msg)
3823                 return -ENOMEM;
3824
3825         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3826                     NL80211_CMD_SET_BSS, 0);
3827
3828         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3829                 rates[rates_len++] = basic_rates[i] / 5;
3830
3831         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3832
3833         /* TODO: multi-BSS support */
3834         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3835
3836         return send_and_recv_msgs(drv, msg, NULL, NULL);
3837  nla_put_failure:
3838         return -ENOBUFS;
3839 }
3840
3841
3842 /* Set kernel driver on given frequency (MHz) */
3843 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3844 {
3845         struct wpa_driver_nl80211_data *drv = priv;
3846         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3847                                            freq->sec_channel_offset);
3848 }
3849
3850
3851 static int i802_set_rts(void *priv, int rts)
3852 {
3853         struct wpa_driver_nl80211_data *drv = priv;
3854         struct nl_msg *msg;
3855         int ret = -ENOBUFS;
3856         u32 val;
3857
3858         msg = nlmsg_alloc();
3859         if (!msg)
3860                 return -ENOMEM;
3861
3862         if (rts >= 2347)
3863                 val = (u32) -1;
3864         else
3865                 val = rts;
3866
3867         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3868                     0, NL80211_CMD_SET_WIPHY, 0);
3869         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3870         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3871
3872         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3873         if (!ret)
3874                 return 0;
3875 nla_put_failure:
3876         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3877                    "%d (%s)", rts, ret, strerror(-ret));
3878         return ret;
3879 }
3880
3881
3882 static int i802_set_frag(void *priv, int frag)
3883 {
3884         struct wpa_driver_nl80211_data *drv = priv;
3885         struct nl_msg *msg;
3886         int ret = -ENOBUFS;
3887         u32 val;
3888
3889         msg = nlmsg_alloc();
3890         if (!msg)
3891                 return -ENOMEM;
3892
3893         if (frag >= 2346)
3894                 val = (u32) -1;
3895         else
3896                 val = frag;
3897
3898         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3899                     0, NL80211_CMD_SET_WIPHY, 0);
3900         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3901         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3902
3903         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3904         if (!ret)
3905                 return 0;
3906 nla_put_failure:
3907         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3908                    "%d: %d (%s)", frag, ret, strerror(-ret));
3909         return ret;
3910 }
3911
3912
3913 static int i802_flush(void *priv)
3914 {
3915         struct wpa_driver_nl80211_data *drv = priv;
3916         struct nl_msg *msg;
3917
3918         msg = nlmsg_alloc();
3919         if (!msg)
3920                 return -1;
3921
3922         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3923                     0, NL80211_CMD_DEL_STATION, 0);
3924
3925         /*
3926          * XXX: FIX! this needs to flush all VLANs too
3927          */
3928         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3929                     if_nametoindex(drv->ifname));
3930
3931         return send_and_recv_msgs(drv, msg, NULL, NULL);
3932  nla_put_failure:
3933         return -ENOBUFS;
3934 }
3935
3936
3937 static int get_sta_handler(struct nl_msg *msg, void *arg)
3938 {
3939         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3940         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3941         struct hostap_sta_driver_data *data = arg;
3942         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3943         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3944                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3945                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3946                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3947                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3948                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3949         };
3950
3951         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3952                   genlmsg_attrlen(gnlh, 0), NULL);
3953
3954         /*
3955          * TODO: validate the interface and mac address!
3956          * Otherwise, there's a race condition as soon as
3957          * the kernel starts sending station notifications.
3958          */
3959
3960         if (!tb[NL80211_ATTR_STA_INFO]) {
3961                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3962                 return NL_SKIP;
3963         }
3964         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3965                              tb[NL80211_ATTR_STA_INFO],
3966                              stats_policy)) {
3967                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3968                 return NL_SKIP;
3969         }
3970
3971         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3972                 data->inactive_msec =
3973                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3974         if (stats[NL80211_STA_INFO_RX_BYTES])
3975                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3976         if (stats[NL80211_STA_INFO_TX_BYTES])
3977                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3978         if (stats[NL80211_STA_INFO_RX_PACKETS])
3979                 data->rx_packets =
3980                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3981         if (stats[NL80211_STA_INFO_TX_PACKETS])
3982                 data->tx_packets =
3983                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3984
3985         return NL_SKIP;
3986 }
3987
3988 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3989                               const u8 *addr)
3990 {
3991         struct wpa_driver_nl80211_data *drv = priv;
3992         struct nl_msg *msg;
3993
3994         os_memset(data, 0, sizeof(*data));
3995         msg = nlmsg_alloc();
3996         if (!msg)
3997                 return -ENOMEM;
3998
3999         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4000                     0, NL80211_CMD_GET_STATION, 0);
4001
4002         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4003         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4004
4005         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4006  nla_put_failure:
4007         return -ENOBUFS;
4008 }
4009
4010
4011 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4012                                     int cw_min, int cw_max, int burst_time)
4013 {
4014         struct wpa_driver_nl80211_data *drv = priv;
4015         struct nl_msg *msg;
4016         struct nlattr *txq, *params;
4017
4018         msg = nlmsg_alloc();
4019         if (!msg)
4020                 return -1;
4021
4022         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4023                     0, NL80211_CMD_SET_WIPHY, 0);
4024
4025         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4026
4027         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4028         if (!txq)
4029                 goto nla_put_failure;
4030
4031         /* We are only sending parameters for a single TXQ at a time */
4032         params = nla_nest_start(msg, 1);
4033         if (!params)
4034                 goto nla_put_failure;
4035
4036         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4037         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4038          * 32 usec, so need to convert the value here. */
4039         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4040         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4041         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4042         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4043
4044         nla_nest_end(msg, params);
4045
4046         nla_nest_end(msg, txq);
4047
4048         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4049                 return 0;
4050  nla_put_failure:
4051         return -1;
4052 }
4053
4054
4055 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
4056 {
4057         struct wpa_driver_nl80211_data *drv = priv;
4058         int ifidx;
4059         struct i802_bss *bss;
4060
4061         bss = os_zalloc(sizeof(*bss));
4062         if (bss == NULL)
4063                 return -1;
4064
4065         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
4066         if (ifidx < 0) {
4067                 os_free(bss);
4068                 return -1;
4069         }
4070         bss->ifindex = ifidx;
4071         if (hostapd_set_iface_flags(priv, ifname, 1)) {
4072                 nl80211_remove_iface(priv, ifidx);
4073                 os_free(bss);
4074                 return -1;
4075         }
4076         bss->next = drv->bss.next;
4077         drv->bss.next = bss;
4078         return 0;
4079 }
4080
4081
4082 static int i802_bss_remove(void *priv, const char *ifname)
4083 {
4084         struct wpa_driver_nl80211_data *drv = priv;
4085         struct i802_bss *bss, *prev;
4086         int ifindex = if_nametoindex(ifname);
4087         nl80211_remove_iface(priv, ifindex);
4088         prev = &drv->bss;
4089         bss = drv->bss.next;
4090         while (bss) {
4091                 if (ifindex == bss->ifindex) {
4092                         prev->next = bss->next;
4093                         os_free(bss);
4094                         break;
4095                 }
4096                 prev = bss;
4097                 bss = bss->next;
4098         }
4099         return 0;
4100 }
4101
4102
4103 static int i802_set_beacon(const char *iface, void *priv,
4104                            const u8 *head, size_t head_len,
4105                            const u8 *tail, size_t tail_len, int dtim_period)
4106 {
4107         return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
4108                                                    head, head_len,
4109                                                    tail, tail_len,
4110                                                    dtim_period);
4111 }
4112
4113
4114 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4115 {
4116         struct wpa_driver_nl80211_data *drv = priv;
4117         struct nl_msg *msg;
4118
4119         msg = nlmsg_alloc();
4120         if (!msg)
4121                 return -ENOMEM;
4122
4123         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4124                     NL80211_CMD_SET_BSS, 0);
4125
4126         if (cts >= 0)
4127                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4128         if (preamble >= 0)
4129                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4130         if (slot >= 0)
4131                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4132
4133         /* TODO: multi-BSS support */
4134         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, 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 i802_set_cts_protect(void *priv, int value)
4143 {
4144         return i802_set_bss(priv, value, -1, -1);
4145 }
4146
4147
4148 static int i802_set_preamble(void *priv, int value)
4149 {
4150         return i802_set_bss(priv, -1, value, -1);
4151 }
4152
4153
4154 static int i802_set_short_slot_time(void *priv, int value)
4155 {
4156         return i802_set_bss(priv, -1, -1, value);
4157 }
4158
4159
4160 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
4161 {
4162         switch (type) {
4163         case HOSTAPD_IF_VLAN:
4164                 return NL80211_IFTYPE_AP_VLAN;
4165         }
4166         return -1;
4167 }
4168
4169
4170 static int i802_if_add(const char *iface, void *priv,
4171                        enum hostapd_driver_if_type type, char *ifname,
4172                        const u8 *addr)
4173 {
4174         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
4175                 return -1;
4176         return 0;
4177 }
4178
4179
4180 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
4181                           char *ifname, const u8 *addr)
4182 {
4183         /* unused at the moment */
4184         return -1;
4185 }
4186
4187
4188 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
4189                           const char *ifname, const u8 *addr)
4190 {
4191         nl80211_remove_iface(priv, if_nametoindex(ifname));
4192         return 0;
4193 }
4194
4195
4196 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4197                              const char *ifname, int vlan_id)
4198 {
4199         struct wpa_driver_nl80211_data *drv = priv;
4200         struct nl_msg *msg;
4201
4202         msg = nlmsg_alloc();
4203         if (!msg)
4204                 return -ENOMEM;
4205
4206         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4207                     0, NL80211_CMD_SET_STATION, 0);
4208
4209         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4210                     if_nametoindex(drv->ifname));
4211         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4212         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4213                     if_nametoindex(ifname));
4214
4215         return send_and_recv_msgs(drv, msg, NULL, NULL);
4216  nla_put_failure:
4217         return -ENOBUFS;
4218 }
4219
4220
4221 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4222 {
4223         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4224         struct sockaddr_ll lladdr;
4225         unsigned char buf[3000];
4226         int len;
4227         socklen_t fromlen = sizeof(lladdr);
4228
4229         len = recvfrom(sock, buf, sizeof(buf), 0,
4230                        (struct sockaddr *)&lladdr, &fromlen);
4231         if (len < 0) {
4232                 perror("recv");
4233                 return;
4234         }
4235
4236         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4237                 void *ctx;
4238                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4239                 if (!ctx)
4240                         return;
4241                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4242         }
4243 }
4244
4245
4246 static int i802_get_inact_sec(void *priv, const u8 *addr)
4247 {
4248         struct hostap_sta_driver_data data;
4249         int ret;
4250
4251         data.inactive_msec = (unsigned long) -1;
4252         ret = i802_read_sta_data(priv, &data, addr);
4253         if (ret || data.inactive_msec == (unsigned long) -1)
4254                 return -1;
4255         return data.inactive_msec / 1000;
4256 }
4257
4258
4259 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4260 {
4261 #if 0
4262         /* TODO */
4263 #endif
4264         return 0;
4265 }
4266
4267
4268 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4269                            int reason)
4270 {
4271         struct wpa_driver_nl80211_data *drv = priv;
4272         struct ieee80211_mgmt mgmt;
4273
4274         memset(&mgmt, 0, sizeof(mgmt));
4275         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4276                                           WLAN_FC_STYPE_DEAUTH);
4277         memcpy(mgmt.da, addr, ETH_ALEN);
4278         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4279         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4280         mgmt.u.deauth.reason_code = host_to_le16(reason);
4281         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4282                                             IEEE80211_HDRLEN +
4283                                             sizeof(mgmt.u.deauth));
4284 }
4285
4286
4287 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4288                              int reason)
4289 {
4290         struct wpa_driver_nl80211_data *drv = priv;
4291         struct ieee80211_mgmt mgmt;
4292
4293         memset(&mgmt, 0, sizeof(mgmt));
4294         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4295                                           WLAN_FC_STYPE_DISASSOC);
4296         memcpy(mgmt.da, addr, ETH_ALEN);
4297         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4298         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4299         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4300         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4301                                             IEEE80211_HDRLEN +
4302                                             sizeof(mgmt.u.disassoc));
4303 }
4304
4305
4306 static void *i802_init(struct hostapd_data *hapd,
4307                        struct wpa_init_params *params)
4308 {
4309         struct wpa_driver_nl80211_data *drv;
4310         size_t i;
4311
4312         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4313         if (drv == NULL)
4314                 return NULL;
4315
4316         drv->bss.ifindex = drv->ifindex;
4317
4318         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4319         drv->if_indices = drv->default_if_indices;
4320         for (i = 0; i < params->num_bridge; i++) {
4321                 if (params->bridge[i])
4322                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4323         }
4324
4325         /* start listening for EAPOL on the default AP interface */
4326         add_ifidx(drv, drv->ifindex);
4327
4328         if (params->bssid) {
4329                 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4330                         goto failed;
4331
4332                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4333                         goto failed;
4334         }
4335
4336         if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
4337                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4338                            "into AP mode", drv->ifname);
4339                 goto failed;
4340         }
4341
4342         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4343                 goto failed;
4344
4345         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4346         if (drv->eapol_sock < 0) {
4347                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4348                 goto failed;
4349         }
4350
4351         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4352         {
4353                 printf("Could not register read socket for eapol\n");
4354                 goto failed;
4355         }
4356
4357         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4358                 goto failed;
4359
4360         return drv;
4361
4362 failed:
4363         nl80211_remove_monitor_interface(drv);
4364         if (drv->ioctl_sock >= 0)
4365                 close(drv->ioctl_sock);
4366
4367         genl_family_put(drv->nl80211);
4368         nl_cache_free(drv->nl_cache);
4369         nl_handle_destroy(drv->nl_handle);
4370         nl_cb_put(drv->nl_cb);
4371
4372         os_free(drv);
4373         return NULL;
4374 }
4375
4376
4377 static void i802_deinit(void *priv)
4378 {
4379         wpa_driver_nl80211_deinit(priv);
4380 }
4381
4382 #endif /* HOSTAPD */
4383
4384
4385 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4386         .name = "nl80211",
4387         .desc = "Linux nl80211/cfg80211",
4388 #ifndef HOSTAPD
4389         .get_bssid = wpa_driver_nl80211_get_bssid,
4390         .get_ssid = wpa_driver_nl80211_get_ssid,
4391         .set_key = wpa_driver_nl80211_set_key,
4392 #endif /* HOSTAPD */
4393         .scan2 = wpa_driver_nl80211_scan,
4394         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4395 #ifndef HOSTAPD
4396         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4397         .disassociate = wpa_driver_nl80211_disassociate,
4398         .authenticate = wpa_driver_nl80211_authenticate,
4399         .associate = wpa_driver_nl80211_associate,
4400         .init = wpa_driver_nl80211_init,
4401         .deinit = wpa_driver_nl80211_deinit,
4402         .get_capa = wpa_driver_nl80211_get_capa,
4403         .set_operstate = wpa_driver_nl80211_set_operstate,
4404         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4405 #endif /* HOSTAPD */
4406         .set_country = wpa_driver_nl80211_set_country,
4407         .set_mode = wpa_driver_nl80211_set_mode,
4408 #ifdef CONFIG_AP
4409         .set_beacon = wpa_driver_nl80211_set_beacon,
4410 #endif /* CONFIG_AP */
4411 #if defined(CONFIG_AP) || defined(HOSTAPD)
4412         .send_mlme = wpa_driver_nl80211_send_mlme,
4413         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4414         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4415         .sta_add = wpa_driver_nl80211_sta_add,
4416         .sta_remove = wpa_driver_nl80211_sta_remove,
4417         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4418         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4419 #endif /* CONFIG_AP || HOSTAPD */
4420 #ifdef HOSTAPD
4421         .hapd_init = i802_init,
4422         .hapd_deinit = i802_deinit,
4423         .hapd_set_key = i802_set_key,
4424         .get_seqnum = i802_get_seqnum,
4425         .flush = i802_flush,
4426         .read_sta_data = i802_read_sta_data,
4427         .sta_deauth = i802_sta_deauth,
4428         .sta_disassoc = i802_sta_disassoc,
4429         .get_inact_sec = i802_get_inact_sec,
4430         .sta_clear_stats = i802_sta_clear_stats,
4431         .set_freq = i802_set_freq,
4432         .set_rts = i802_set_rts,
4433         .set_frag = i802_set_frag,
4434         .set_rate_sets = i802_set_rate_sets,
4435         .hapd_set_beacon = i802_set_beacon,
4436         .set_cts_protect = i802_set_cts_protect,
4437         .set_preamble = i802_set_preamble,
4438         .set_short_slot_time = i802_set_short_slot_time,
4439         .set_tx_queue_params = i802_set_tx_queue_params,
4440         .bss_add = i802_bss_add,
4441         .bss_remove = i802_bss_remove,
4442         .if_add = i802_if_add,
4443         .if_update = i802_if_update,
4444         .if_remove = i802_if_remove,
4445         .set_sta_vlan = i802_set_sta_vlan,
4446 #endif /* HOSTAPD */
4447 };