vcs.maemo.org Git - wpasupplicant/blob - src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if_arp.h>
  22 #include <net/if.h>
  23 #include <netlink/genl/genl.h>
  24 #include <netlink/genl/family.h>
  25 #include <netlink/genl/ctrl.h>
  26 #include "nl80211_copy.h"
  27 #ifndef NO_WEXT
  28 #include "wireless_copy.h"
  29 #endif /* NO_WEXT */
  30
  31 #include "common.h"
  32 #include "driver.h"
  33 #include "eloop.h"
  34 #include "ieee802_11_defs.h"
  35
  36 #if defined(CONFIG_AP) || defined(HOSTAPD)
  37 #include <netpacket/packet.h>
  38 #include <linux/filter.h>
  39 #include "radiotap.h"
  40 #include "radiotap_iter.h"
  41
  42 #include "../../hostapd/hostapd_defs.h"
  43 #endif /* CONFIG_AP || HOSTAPD */
  44
  45 #ifdef HOSTAPD
  46 #include "../../hostapd/sta_flags.h"
  47 #include "ieee802_11_common.h"
  48
  49 #ifdef CONFIG_LIBNL20
  50 /* libnl 2.0 compatibility code */
  51 #define nl_handle_alloc_cb nl_socket_alloc_cb
  52 #define nl_handle_destroy nl_socket_free
  53 #endif /* CONFIG_LIBNL20 */
  54
  55 #endif /* HOSTAPD */
  56
  57
  58 #ifndef IFF_LOWER_UP
  59 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  60 #endif
  61 #ifndef IFF_DORMANT
  62 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  63 #endif
  64
  65 #ifndef IF_OPER_DORMANT
  66 #define IF_OPER_DORMANT 5
  67 #endif
  68 #ifndef IF_OPER_UP
  69 #define IF_OPER_UP 6
  70 #endif
  71
  72 struct i802_bss {
  73         struct i802_bss *next;
  74         int ifindex;
  75         unsigned int beacon_set:1;
  76 };
  77
  78 struct wpa_driver_nl80211_data {
  79         void *ctx;
  80         int link_event_sock;
  81         int ioctl_sock; /* socket for ioctl() use */
  82         char ifname[IFNAMSIZ + 1];
  83         int ifindex;
  84         int if_removed;
  85         struct wpa_driver_capa capa;
  86         int has_capability;
  87
  88         int operstate;
  89
  90         int scan_complete_events;
  91
  92         struct nl_handle *nl_handle;
  93         struct nl_cache *nl_cache;
  94         struct nl_cb *nl_cb;
  95         struct genl_family *nl80211;
  96
  97         u8 bssid[ETH_ALEN];
  98         int associated;
  99         u8 ssid[32];
 100         size_t ssid_len;
 101         int nlmode;
 102         int ap_scan_as_station;
 103
 104         int beacon_int;
 105         int monitor_sock;
 106         int monitor_ifidx;
 107
 108 #ifdef CONFIG_AP
 109         unsigned int beacon_set:1;
 110 #endif /* CONFIG_AP */
 111
 112 #ifdef HOSTAPD
 113         int eapol_sock; /* socket for EAPOL frames */
 114
 115         int default_if_indices[16];
 116         int *if_indices;
 117         int num_if_indices;
 118
 119         struct i802_bss bss;
 120
 121         int last_freq;
 122         int last_freq_ht;
 123 #endif /* HOSTAPD */
 124 };
 125
 126
 127 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 128                                             void *timeout_ctx);
 129 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 130 static int
 131 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 132
 133 #if defined(CONFIG_AP) || defined(HOSTAPD)
 134 static void nl80211_remove_monitor_interface(
 135         struct wpa_driver_nl80211_data *drv);
 136 #endif /* CONFIG_AP || HOSTAPD */
 137
 138 #ifdef CONFIG_AP
 139 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 140                                  int ifidx);
 141 #endif /* CONFIG_AP */
 142
 143 #ifdef HOSTAPD
 144 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 145 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 146 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 147                                  int ifindex);
 148 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 149                                  int ifidx);
 150 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 151 #endif /* HOSTAPD */
 152
 153
 154 /* nl80211 code */
 155 static int ack_handler(struct nl_msg *msg, void *arg)
 156 {
 157         int *err = arg;
 158         *err = 0;
 159         return NL_STOP;
 160 }
 161
 162 static int finish_handler(struct nl_msg *msg, void *arg)
 163 {
 164         int *ret = arg;
 165         *ret = 0;
 166         return NL_SKIP;
 167 }
 168
 169 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 170                          void *arg)
 171 {
 172         int *ret = arg;
 173         *ret = err->error;
 174         return NL_SKIP;
 175 }
 176
 177
 178 static int no_seq_check(struct nl_msg *msg, void *arg)
 179 {
 180         return NL_OK;
 181 }
 182
 183
 184 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 185                               struct nl_msg *msg,
 186                               int (*valid_handler)(struct nl_msg *, void *),
 187                               void *valid_data)
 188 {
 189         struct nl_cb *cb;
 190         int err = -ENOMEM;
 191
 192         cb = nl_cb_clone(drv->nl_cb);
 193         if (!cb)
 194                 goto out;
 195
 196         err = nl_send_auto_complete(drv->nl_handle, msg);
 197         if (err < 0)
 198                 goto out;
 199
 200         err = 1;
 201
 202         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 203         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 204         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 205
 206         if (valid_handler)
 207                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 208                           valid_handler, valid_data);
 209
 210         while (err > 0)
 211                 nl_recvmsgs(drv->nl_handle, cb);
 212  out:
 213         nl_cb_put(cb);
 214         nlmsg_free(msg);
 215         return err;
 216 }
 217
 218
 219 struct family_data {
 220         const char *group;
 221         int id;
 222 };
 223
 224
 225 static int family_handler(struct nl_msg *msg, void *arg)
 226 {
 227         struct family_data *res = arg;
 228         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 229         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 230         struct nlattr *mcgrp;
 231         int i;
 232
 233         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 234                   genlmsg_attrlen(gnlh, 0), NULL);
 235         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 236                 return NL_SKIP;
 237
 238         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 239                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 240                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 241                           nla_len(mcgrp), NULL);
 242                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 243                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 244                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 245                                res->group,
 246                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 247                         continue;
 248                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 249                 break;
 250         };
 251
 252         return NL_SKIP;
 253 }
 254
 255
 256 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 257                                const char *family, const char *group)
 258 {
 259         struct nl_msg *msg;
 260         int ret = -1;
 261         struct family_data res = { group, -ENOENT };
 262
 263         msg = nlmsg_alloc();
 264         if (!msg)
 265                 return -ENOMEM;
 266         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 267                     0, 0, CTRL_CMD_GETFAMILY, 0);
 268         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 269
 270         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 271         msg = NULL;
 272         if (ret == 0)
 273                 ret = res.id;
 274
 275 nla_put_failure:
 276         nlmsg_free(msg);
 277         return ret;
 278 }
 279
 280
 281 #ifdef HOSTAPD
 282 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 283                         const char *ifname, u8 *addr)
 284 {
 285         struct ifreq ifr;
 286
 287         os_memset(&ifr, 0, sizeof(ifr));
 288         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 289         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 290                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 291                            ifname, errno, strerror(errno));
 292                 return -1;
 293         }
 294
 295         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 296                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 297                            ifname, ifr.ifr_hwaddr.sa_family);
 298                 return -1;
 299         }
 300         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 301
 302         return 0;
 303 }
 304
 305
 306 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 307                         const char *ifname, const u8 *addr)
 308 {
 309         struct ifreq ifr;
 310
 311         os_memset(&ifr, 0, sizeof(ifr));
 312         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 313         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 314         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 315
 316         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 317                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 318                            ifname, errno, strerror(errno));
 319                 return -1;
 320         }
 321
 322         return 0;
 323 }
 324 #endif /* HOSTAPD */
 325
 326
 327 #ifndef HOSTAPD
 328
 329 static int wpa_driver_nl80211_send_oper_ifla(
 330         struct wpa_driver_nl80211_data *drv,
 331         int linkmode, int operstate)
 332 {
 333         struct {
 334                 struct nlmsghdr hdr;
 335                 struct ifinfomsg ifinfo;
 336                 char opts[16];
 337         } req;
 338         struct rtattr *rta;
 339         static int nl_seq;
 340         ssize_t ret;
 341
 342         os_memset(&req, 0, sizeof(req));
 343
 344         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 345         req.hdr.nlmsg_type = RTM_SETLINK;
 346         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 347         req.hdr.nlmsg_seq = ++nl_seq;
 348         req.hdr.nlmsg_pid = 0;
 349
 350         req.ifinfo.ifi_family = AF_UNSPEC;
 351         req.ifinfo.ifi_type = 0;
 352         req.ifinfo.ifi_index = drv->ifindex;
 353         req.ifinfo.ifi_flags = 0;
 354         req.ifinfo.ifi_change = 0;
 355
 356         if (linkmode != -1) {
 357                 rta = (struct rtattr *)
 358                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 359                 rta->rta_type = IFLA_LINKMODE;
 360                 rta->rta_len = RTA_LENGTH(sizeof(char));
 361                 *((char *) RTA_DATA(rta)) = linkmode;
 362                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 363                         RTA_LENGTH(sizeof(char));
 364         }
 365         if (operstate != -1) {
 366                 rta = (struct rtattr *)
 367                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 368                 rta->rta_type = IFLA_OPERSTATE;
 369                 rta->rta_len = RTA_LENGTH(sizeof(char));
 370                 *((char *) RTA_DATA(rta)) = operstate;
 371                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 372                         RTA_LENGTH(sizeof(char));
 373         }
 374
 375         wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
 376                    linkmode, operstate);
 377
 378         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 379         if (ret < 0) {
 380                 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
 381                            " %s (assume operstate is not supported)",
 382                            strerror(errno));
 383         }
 384
 385         return ret < 0 ? -1 : 0;
 386 }
 387
 388
 389 #ifndef NO_WEXT
 390 static int wpa_driver_nl80211_set_auth_param(
 391         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 392 {
 393         struct iwreq iwr;
 394         int ret = 0;
 395
 396         os_memset(&iwr, 0, sizeof(iwr));
 397         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 398         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 399         iwr.u.param.value = value;
 400
 401         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 402                 if (errno != EOPNOTSUPP) {
 403                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 404                                    "value 0x%x) failed: %s)",
 405                                    idx, value, strerror(errno));
 406                 }
 407                 ret = errno == EOPNOTSUPP ? -2 : -1;
 408         }
 409
 410         return ret;
 411 }
 412 #endif /* NO_WEXT */
 413
 414
 415 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 416 {
 417         struct wpa_driver_nl80211_data *drv = priv;
 418         if (!drv->associated)
 419                 return -1;
 420         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 421         return 0;
 422 }
 423
 424
 425 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 426 {
 427         struct wpa_driver_nl80211_data *drv = priv;
 428         if (!drv->associated)
 429                 return -1;
 430         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 431         return drv->ssid_len;
 432 }
 433
 434
 435 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 436                                           void *ctx, char *buf, size_t len,
 437                                           int del)
 438 {
 439         union wpa_event_data event;
 440
 441         os_memset(&event, 0, sizeof(event));
 442         if (len > sizeof(event.interface_status.ifname))
 443                 len = sizeof(event.interface_status.ifname) - 1;
 444         os_memcpy(event.interface_status.ifname, buf, len);
 445         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 446                 EVENT_INTERFACE_ADDED;
 447
 448         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 449                    del ? "DEL" : "NEW",
 450                    event.interface_status.ifname,
 451                    del ? "removed" : "added");
 452
 453         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 454                 if (del)
 455                         drv->if_removed = 1;
 456                 else
 457                         drv->if_removed = 0;
 458         }
 459
 460         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 461 }
 462
 463
 464 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 465                                          struct nlmsghdr *h)
 466 {
 467         struct ifinfomsg *ifi;
 468         int attrlen, _nlmsg_len, rta_len;
 469         struct rtattr *attr;
 470
 471         ifi = NLMSG_DATA(h);
 472
 473         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 474
 475         attrlen = h->nlmsg_len - _nlmsg_len;
 476         if (attrlen < 0)
 477                 return 0;
 478
 479         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 480
 481         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 482         while (RTA_OK(attr, attrlen)) {
 483                 if (attr->rta_type == IFLA_IFNAME) {
 484                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 485                             == 0)
 486                                 return 1;
 487                         else
 488                                 break;
 489                 }
 490                 attr = RTA_NEXT(attr, attrlen);
 491         }
 492
 493         return 0;
 494 }
 495
 496
 497 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 498                                           int ifindex, struct nlmsghdr *h)
 499 {
 500         if (drv->ifindex == ifindex)
 501                 return 1;
 502
 503         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 504                 drv->ifindex = if_nametoindex(drv->ifname);
 505                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 506                            "interface");
 507                 wpa_driver_nl80211_finish_drv_init(drv);
 508                 return 1;
 509         }
 510
 511         return 0;
 512 }
 513
 514
 515 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 516                                               void *ctx, struct nlmsghdr *h,
 517                                               size_t len)
 518 {
 519         struct ifinfomsg *ifi;
 520         int attrlen, _nlmsg_len, rta_len;
 521         struct rtattr * attr;
 522
 523         if (len < sizeof(*ifi))
 524                 return;
 525
 526         ifi = NLMSG_DATA(h);
 527
 528         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 529                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 530                            ifi->ifi_index);
 531                 return;
 532         }
 533
 534         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 535                    "(%s%s%s%s)",
 536                    drv->operstate, ifi->ifi_flags,
 537                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 538                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 539                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 540                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 541         /*
 542          * Some drivers send the association event before the operup event--in
 543          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 544          * fails. This will hit us when wpa_supplicant does not need to do
 545          * IEEE 802.1X authentication
 546          */
 547         if (drv->operstate == 1 &&
 548             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 549             !(ifi->ifi_flags & IFF_RUNNING))
 550                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 551
 552         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 553
 554         attrlen = h->nlmsg_len - _nlmsg_len;
 555         if (attrlen < 0)
 556                 return;
 557
 558         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 559
 560         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 561         while (RTA_OK(attr, attrlen)) {
 562                 if (attr->rta_type == IFLA_IFNAME) {
 563                         wpa_driver_nl80211_event_link(
 564                                 drv, ctx,
 565                                 ((char *) attr) + rta_len,
 566                                 attr->rta_len - rta_len, 0);
 567                 }
 568                 attr = RTA_NEXT(attr, attrlen);
 569         }
 570 }
 571
 572
 573 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 574                                               void *ctx, struct nlmsghdr *h,
 575                                               size_t len)
 576 {
 577         struct ifinfomsg *ifi;
 578         int attrlen, _nlmsg_len, rta_len;
 579         struct rtattr * attr;
 580
 581         if (len < sizeof(*ifi))
 582                 return;
 583
 584         ifi = NLMSG_DATA(h);
 585
 586         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 587
 588         attrlen = h->nlmsg_len - _nlmsg_len;
 589         if (attrlen < 0)
 590                 return;
 591
 592         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 593
 594         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 595         while (RTA_OK(attr, attrlen)) {
 596                 if (attr->rta_type == IFLA_IFNAME) {
 597                         wpa_driver_nl80211_event_link(
 598                                 drv, ctx,
 599                                 ((char *) attr) + rta_len,
 600                                 attr->rta_len - rta_len, 1);
 601                 }
 602                 attr = RTA_NEXT(attr, attrlen);
 603         }
 604 }
 605
 606
 607 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 608                                                   void *sock_ctx)
 609 {
 610         char buf[8192];
 611         int left;
 612         struct sockaddr_nl from;
 613         socklen_t fromlen;
 614         struct nlmsghdr *h;
 615         int max_events = 10;
 616
 617 try_again:
 618         fromlen = sizeof(from);
 619         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 620                         (struct sockaddr *) &from, &fromlen);
 621         if (left < 0) {
 622                 if (errno != EINTR && errno != EAGAIN)
 623                         perror("recvfrom(netlink)");
 624                 return;
 625         }
 626
 627         h = (struct nlmsghdr *) buf;
 628         while (left >= (int) sizeof(*h)) {
 629                 int len, plen;
 630
 631                 len = h->nlmsg_len;
 632                 plen = len - sizeof(*h);
 633                 if (len > left || plen < 0) {
 634                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 635                                    "len=%d left=%d plen=%d",
 636                                    len, left, plen);
 637                         break;
 638                 }
 639
 640                 switch (h->nlmsg_type) {
 641                 case RTM_NEWLINK:
 642                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 643                                                           h, plen);
 644                         break;
 645                 case RTM_DELLINK:
 646                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 647                                                           h, plen);
 648                         break;
 649                 }
 650
 651                 len = NLMSG_ALIGN(len);
 652                 left -= len;
 653                 h = (struct nlmsghdr *) ((char *) h + len);
 654         }
 655
 656         if (left > 0) {
 657                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 658                            "message", left);
 659         }
 660
 661         if (--max_events > 0) {
 662                 /*
 663                  * Try to receive all events in one eloop call in order to
 664                  * limit race condition on cases where AssocInfo event, Assoc
 665                  * event, and EAPOL frames are received more or less at the
 666                  * same time. We want to process the event messages first
 667                  * before starting EAPOL processing.
 668                  */
 669                 goto try_again;
 670         }
 671 }
 672
 673
 674 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 675                             const u8 *frame, size_t len)
 676 {
 677         const struct ieee80211_mgmt *mgmt;
 678         union wpa_event_data event;
 679
 680         mgmt = (const struct ieee80211_mgmt *) frame;
 681         if (len < 24 + sizeof(mgmt->u.auth)) {
 682                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 683                            "frame");
 684                 return;
 685         }
 686
 687         os_memset(&event, 0, sizeof(event));
 688         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 689         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 690         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 691         if (len > 24 + sizeof(mgmt->u.auth)) {
 692                 event.auth.ies = mgmt->u.auth.variable;
 693                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 694         }
 695
 696         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 697 }
 698
 699
 700 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 701                             const u8 *frame, size_t len)
 702 {
 703         const struct ieee80211_mgmt *mgmt;
 704         union wpa_event_data event;
 705         u16 status;
 706
 707         mgmt = (const struct ieee80211_mgmt *) frame;
 708         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 709                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 710                            "frame");
 711                 return;
 712         }
 713
 714         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 715         if (status != WLAN_STATUS_SUCCESS) {
 716                 os_memset(&event, 0, sizeof(event));
 717                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 718                         event.assoc_reject.resp_ies =
 719                                 (u8 *) mgmt->u.assoc_resp.variable;
 720                         event.assoc_reject.resp_ies_len =
 721                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 722                 }
 723                 event.assoc_reject.status_code = status;
 724
 725                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 726                 return;
 727         }
 728
 729         drv->associated = 1;
 730         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 731
 732         os_memset(&event, 0, sizeof(event));
 733         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 734                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 735                 event.assoc_info.resp_ies_len =
 736                         len - 24 - sizeof(mgmt->u.assoc_resp);
 737         }
 738
 739         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 740 }
 741
 742
 743 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 744                        enum nl80211_commands cmd, struct nlattr *frame)
 745 {
 746         if (frame == NULL) {
 747                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 748                            "data", cmd);
 749                 return;
 750         }
 751
 752         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 753         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 754                     nla_data(frame), nla_len(frame));
 755
 756         switch (cmd) {
 757         case NL80211_CMD_AUTHENTICATE:
 758                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 759                 break;
 760         case NL80211_CMD_ASSOCIATE:
 761                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 762                 break;
 763         case NL80211_CMD_DEAUTHENTICATE:
 764                 drv->associated = 0;
 765                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 766                 break;
 767         case NL80211_CMD_DISASSOCIATE:
 768                 drv->associated = 0;
 769                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 770                 break;
 771         default:
 772                 break;
 773         }
 774 }
 775
 776 #endif /* HOSTAPD */
 777
 778
 779 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 780                                            struct nlattr *tb[])
 781 {
 782         union wpa_event_data data;
 783
 784         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 785         os_memset(&data, 0, sizeof(data));
 786         if (tb[NL80211_ATTR_MAC]) {
 787                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 788                             nla_data(tb[NL80211_ATTR_MAC]),
 789                             nla_len(tb[NL80211_ATTR_MAC]));
 790                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 791         }
 792         if (tb[NL80211_ATTR_KEY_SEQ]) {
 793                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 794                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 795                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 796         }
 797         if (tb[NL80211_ATTR_KEY_TYPE]) {
 798                 enum nl80211_key_type key_type =
 799                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 800                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 801                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 802                         data.michael_mic_failure.unicast = 1;
 803         } else
 804                 data.michael_mic_failure.unicast = 1;
 805
 806         if (tb[NL80211_ATTR_KEY_IDX]) {
 807                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 808                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 809         }
 810
 811         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 812 }
 813
 814
 815 static int process_event(struct nl_msg *msg, void *arg)
 816 {
 817         struct wpa_driver_nl80211_data *drv = arg;
 818         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 819         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 820
 821         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 822                   genlmsg_attrlen(gnlh, 0), NULL);
 823
 824         if (tb[NL80211_ATTR_IFINDEX]) {
 825                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 826                 if (ifindex != drv->ifindex) {
 827                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 828                                    " for foreign interface (ifindex %d)",
 829                                    gnlh->cmd, ifindex);
 830                         return NL_SKIP;
 831                 }
 832         }
 833
 834         if (drv->ap_scan_as_station &&
 835             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 836              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 837                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 838                 drv->ap_scan_as_station = 0;
 839         }
 840
 841         switch (gnlh->cmd) {
 842         case NL80211_CMD_NEW_SCAN_RESULTS:
 843                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 844                 drv->scan_complete_events = 1;
 845                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 846                                      drv->ctx);
 847                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 848                 break;
 849         case NL80211_CMD_SCAN_ABORTED:
 850                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 851                 /*
 852                  * Need to indicate that scan results are available in order
 853                  * not to make wpa_supplicant stop its scanning.
 854                  */
 855                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 856                                      drv->ctx);
 857                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 858                 break;
 859 #ifndef HOSTAPD
 860         case NL80211_CMD_AUTHENTICATE:
 861         case NL80211_CMD_ASSOCIATE:
 862         case NL80211_CMD_DEAUTHENTICATE:
 863         case NL80211_CMD_DISASSOCIATE:
 864                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
 865                 break;
 866 #endif /* HOSTAPD */
 867         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 868                 mlme_event_michael_mic_failure(drv, tb);
 869                 break;
 870         default:
 871                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 872                            "(cmd=%d)", gnlh->cmd);
 873                 break;
 874         }
 875
 876         return NL_SKIP;
 877 }
 878
 879
 880 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 881                                              void *sock_ctx)
 882 {
 883         struct nl_cb *cb;
 884         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 885
 886         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 887
 888         cb = nl_cb_clone(drv->nl_cb);
 889         if (!cb)
 890                 return;
 891         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 892         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 893         nl_recvmsgs(drv->nl_handle, cb);
 894         nl_cb_put(cb);
 895 }
 896
 897
 898 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 899                                    const char *ifname, int dev_up)
 900 {
 901         struct ifreq ifr;
 902
 903         if (drv->ioctl_sock < 0)
 904                 return -1;
 905
 906         os_memset(&ifr, 0, sizeof(ifr));
 907         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 908
 909         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 910                 perror("ioctl[SIOCGIFFLAGS]");
 911                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 912                            ifname);
 913                 return -1;
 914         }
 915
 916         if (dev_up) {
 917                 if (ifr.ifr_flags & IFF_UP)
 918                         return 0;
 919                 ifr.ifr_flags |= IFF_UP;
 920         } else {
 921                 if (!(ifr.ifr_flags & IFF_UP))
 922                         return 0;
 923                 ifr.ifr_flags &= ~IFF_UP;
 924         }
 925
 926         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 927                 perror("ioctl[SIOCSIFFLAGS]");
 928                 return -1;
 929         }
 930
 931         return 0;
 932 }
 933
 934
 935 /**
 936  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 937  * @priv: driver_nl80211 private data
 938  * @alpha2_arg: country to which to switch to
 939  * Returns: 0 on success, -1 on failure
 940  *
 941  * This asks nl80211 to set the regulatory domain for given
 942  * country ISO / IEC alpha2.
 943  */
 944 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 945 {
 946         struct wpa_driver_nl80211_data *drv = priv;
 947         char alpha2[3];
 948         struct nl_msg *msg;
 949
 950         msg = nlmsg_alloc();
 951         if (!msg)
 952                 return -ENOMEM;
 953
 954         alpha2[0] = alpha2_arg[0];
 955         alpha2[1] = alpha2_arg[1];
 956         alpha2[2] = '\0';
 957
 958         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 959                     0, NL80211_CMD_REQ_SET_REG, 0);
 960
 961         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 962         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 963                 return -EINVAL;
 964         return 0;
 965 nla_put_failure:
 966         return -EINVAL;
 967 }
 968
 969
 970 #ifndef HOSTAPD
 971 struct wiphy_info_data {
 972         int max_scan_ssids;
 973         int ap_supported;
 974 };
 975
 976
 977 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 978 {
 979         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 980         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 981         struct wiphy_info_data *info = arg;
 982
 983         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 984                   genlmsg_attrlen(gnlh, 0), NULL);
 985
 986         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 987                 info->max_scan_ssids =
 988                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 989
 990         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 991                 struct nlattr *nl_mode;
 992                 int i;
 993                 nla_for_each_nested(nl_mode,
 994                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 995                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 996                                 info->ap_supported = 1;
 997                                 break;
 998                         }
 999                 }
1000         }
1001
1002         return NL_SKIP;
1003 }
1004
1005
1006 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1007                                        struct wiphy_info_data *info)
1008 {
1009         struct nl_msg *msg;
1010
1011         os_memset(info, 0, sizeof(*info));
1012         msg = nlmsg_alloc();
1013         if (!msg)
1014                 return -1;
1015
1016         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1017                     0, NL80211_CMD_GET_WIPHY, 0);
1018
1019         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1020
1021         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1022                 return 0;
1023         msg = NULL;
1024 nla_put_failure:
1025         nlmsg_free(msg);
1026         return -1;
1027 }
1028
1029
1030 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1031 {
1032         struct wiphy_info_data info;
1033         if (wpa_driver_nl80211_get_info(drv, &info))
1034                 return;
1035         drv->has_capability = 1;
1036         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1037         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1038                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1039                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1040                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1041         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1042                 WPA_DRIVER_CAPA_ENC_WEP104 |
1043                 WPA_DRIVER_CAPA_ENC_TKIP |
1044                 WPA_DRIVER_CAPA_ENC_CCMP;
1045
1046         drv->capa.max_scan_ssids = info.max_scan_ssids;
1047         if (info.ap_supported)
1048                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1049 }
1050 #endif /* HOSTAPD */
1051
1052
1053 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1054                                       void *ctx)
1055 {
1056         int ret;
1057
1058         /* Initialize generic netlink and nl80211 */
1059
1060         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1061         if (drv->nl_cb == NULL) {
1062                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1063                            "callbacks");
1064                 goto err1;
1065         }
1066
1067         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1068         if (drv->nl_handle == NULL) {
1069                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1070                            "callbacks");
1071                 goto err2;
1072         }
1073
1074         if (genl_connect(drv->nl_handle)) {
1075                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1076                            "netlink");
1077                 goto err3;
1078         }
1079
1080 #ifdef CONFIG_LIBNL20
1081         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1082                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1083                            "netlink cache");
1084                 goto err3;
1085         }
1086 #else /* CONFIG_LIBNL20 */
1087         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1088         if (drv->nl_cache == NULL) {
1089                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1090                            "netlink cache");
1091                 goto err3;
1092         }
1093 #endif /* CONFIG_LIBNL20 */
1094
1095
1096         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1097         if (drv->nl80211 == NULL) {
1098                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1099                            "found");
1100                 goto err4;
1101         }
1102
1103         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1104         if (ret >= 0)
1105                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1106         if (ret < 0) {
1107                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1108                            "membership for scan events: %d (%s)",
1109                            ret, strerror(-ret));
1110                 goto err4;
1111         }
1112
1113         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1114         if (ret >= 0)
1115                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1116         if (ret < 0) {
1117                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1118                            "membership for mlme events: %d (%s)",
1119                            ret, strerror(-ret));
1120                 goto err4;
1121         }
1122
1123         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1124                                  wpa_driver_nl80211_event_receive, drv, ctx);
1125
1126         return 0;
1127
1128 err4:
1129         nl_cache_free(drv->nl_cache);
1130 err3:
1131         nl_handle_destroy(drv->nl_handle);
1132 err2:
1133         nl_cb_put(drv->nl_cb);
1134 err1:
1135         return -1;
1136 }
1137
1138
1139 static int wpa_driver_nl80211_init_link_events(
1140         struct wpa_driver_nl80211_data *drv)
1141 {
1142 #ifdef HOSTAPD
1143         return 0;
1144 #else /* HOSTAPD */
1145         int s;
1146         struct sockaddr_nl local;
1147
1148         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1149         if (s < 0) {
1150                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1151                 return -1;
1152         }
1153
1154         os_memset(&local, 0, sizeof(local));
1155         local.nl_family = AF_NETLINK;
1156         local.nl_groups = RTMGRP_LINK;
1157         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1158                 perror("bind(netlink)");
1159                 close(s);
1160                 return -1;
1161         }
1162
1163         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1164                                  drv->ctx);
1165         drv->link_event_sock = s;
1166
1167         return 0;
1168 #endif /* HOSTAPD */
1169 }
1170
1171
1172 /**
1173  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1174  * @ctx: context to be used when calling wpa_supplicant functions,
1175  * e.g., wpa_supplicant_event()
1176  * @ifname: interface name, e.g., wlan0
1177  * Returns: Pointer to private data, %NULL on failure
1178  */
1179 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1180 {
1181         struct wpa_driver_nl80211_data *drv;
1182
1183         drv = os_zalloc(sizeof(*drv));
1184         if (drv == NULL)
1185                 return NULL;
1186         drv->ctx = ctx;
1187         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1188         drv->monitor_ifidx = -1;
1189         drv->monitor_sock = -1;
1190         drv->link_event_sock = -1;
1191         drv->ioctl_sock = -1;
1192
1193         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1194                 os_free(drv);
1195                 return NULL;
1196         }
1197
1198         drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1199
1200         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1201         if (drv->ioctl_sock < 0) {
1202                 perror("socket(PF_INET,SOCK_DGRAM)");
1203                 goto failed;
1204         }
1205
1206         if (wpa_driver_nl80211_init_link_events(drv) ||
1207             wpa_driver_nl80211_finish_drv_init(drv))
1208                 goto failed;
1209
1210         return drv;
1211
1212 failed:
1213         if (drv->link_event_sock >= 0) {
1214                 eloop_unregister_read_sock(drv->link_event_sock);
1215                 close(drv->link_event_sock);
1216         }
1217         if (drv->ioctl_sock >= 0)
1218                 close(drv->ioctl_sock);
1219
1220         genl_family_put(drv->nl80211);
1221         nl_cache_free(drv->nl_cache);
1222         nl_handle_destroy(drv->nl_handle);
1223         nl_cb_put(drv->nl_cb);
1224
1225         os_free(drv);
1226         return NULL;
1227 }
1228
1229
1230 static int
1231 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1232 {
1233         drv->ifindex = if_nametoindex(drv->ifname);
1234
1235 #ifndef HOSTAPD
1236         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1237                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1238                            "use managed mode");
1239         }
1240
1241         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1242                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1243                            "UP", drv->ifname);
1244                 return -1;
1245         }
1246
1247         wpa_driver_nl80211_capa(drv);
1248
1249         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1250 #endif /* HOSTAPD */
1251
1252         return 0;
1253 }
1254
1255
1256 #ifdef HOSTAPD
1257 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1258 {
1259         struct i802_bss *bss, *prev;
1260         bss = drv->bss.next;
1261         while (bss) {
1262                 prev = bss;
1263                 bss = bss->next;
1264                 os_free(bss);
1265         }
1266 }
1267 #endif /* HOSTAPD */
1268
1269
1270 #if defined(CONFIG_AP) || defined(HOSTAPD)
1271 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1272 {
1273         struct nl_msg *msg;
1274
1275         msg = nlmsg_alloc();
1276         if (!msg)
1277                 return -ENOMEM;
1278
1279         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1280                     0, NL80211_CMD_DEL_BEACON, 0);
1281         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1282
1283         return send_and_recv_msgs(drv, msg, NULL, NULL);
1284  nla_put_failure:
1285         return -ENOBUFS;
1286 }
1287 #endif /* CONFIG_AP || HOSTAPD */
1288
1289
1290 /**
1291  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1292  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1293  *
1294  * Shut down driver interface and processing of driver events. Free
1295  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1296  */
1297 static void wpa_driver_nl80211_deinit(void *priv)
1298 {
1299         struct wpa_driver_nl80211_data *drv = priv;
1300
1301 #if defined(CONFIG_AP) || defined(HOSTAPD)
1302         nl80211_remove_monitor_interface(drv);
1303         if (drv->monitor_sock >= 0) {
1304                 eloop_unregister_read_sock(drv->monitor_sock);
1305                 close(drv->monitor_sock);
1306         }
1307
1308         if (drv->nlmode == NL80211_IFTYPE_AP)
1309                 wpa_driver_nl80211_del_beacon(drv);
1310 #endif /* CONFIG_AP || HOSTAPD */
1311
1312 #ifdef HOSTAPD
1313         if (drv->last_freq_ht) {
1314                 /* Clear HT flags from the driver */
1315                 struct hostapd_freq_params freq;
1316                 os_memset(&freq, 0, sizeof(freq));
1317                 freq.freq = drv->last_freq;
1318                 i802_set_freq(priv, &freq);
1319         }
1320
1321         if (drv->eapol_sock >= 0) {
1322                 eloop_unregister_read_sock(drv->eapol_sock);
1323                 close(drv->eapol_sock);
1324         }
1325
1326         if (drv->if_indices != drv->default_if_indices)
1327                 os_free(drv->if_indices);
1328
1329         wpa_driver_nl80211_free_bss(drv);
1330 #else /* HOSTAPD */
1331 #ifndef NO_WEXT
1332         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1333 #endif /* NO_WEXT */
1334
1335         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1336
1337         if (drv->link_event_sock >= 0) {
1338                 eloop_unregister_read_sock(drv->link_event_sock);
1339                 close(drv->link_event_sock);
1340         }
1341 #endif /* HOSTAPD */
1342
1343         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1344
1345         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1346         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1347
1348         if (drv->ioctl_sock >= 0)
1349                 close(drv->ioctl_sock);
1350
1351         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1352         genl_family_put(drv->nl80211);
1353         nl_cache_free(drv->nl_cache);
1354         nl_handle_destroy(drv->nl_handle);
1355         nl_cb_put(drv->nl_cb);
1356
1357         os_free(drv);
1358 }
1359
1360
1361 /**
1362  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1363  * @eloop_ctx: Driver private data
1364  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1365  *
1366  * This function can be used as registered timeout when starting a scan to
1367  * generate a scan completed event if the driver does not report this.
1368  */
1369 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1370 {
1371         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1372         if (drv->ap_scan_as_station) {
1373                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1374                 drv->ap_scan_as_station = 0;
1375         }
1376         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1377         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1378 }
1379
1380
1381 /**
1382  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1383  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1384  * @params: Scan parameters
1385  * Returns: 0 on success, -1 on failure
1386  */
1387 static int wpa_driver_nl80211_scan(void *priv,
1388                                    struct wpa_driver_scan_params *params)
1389 {
1390         struct wpa_driver_nl80211_data *drv = priv;
1391         int ret = 0, timeout;
1392         struct nl_msg *msg, *ssids, *freqs;
1393         size_t i;
1394
1395         msg = nlmsg_alloc();
1396         ssids = nlmsg_alloc();
1397         freqs = nlmsg_alloc();
1398         if (!msg || !ssids || !freqs) {
1399                 nlmsg_free(msg);
1400                 nlmsg_free(ssids);
1401                 nlmsg_free(freqs);
1402                 return -1;
1403         }
1404
1405         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1406                     NL80211_CMD_TRIGGER_SCAN, 0);
1407
1408         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1409
1410         for (i = 0; i < params->num_ssids; i++) {
1411                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1412                         params->ssids[i].ssid);
1413         }
1414         if (params->num_ssids)
1415                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1416
1417         if (params->extra_ies) {
1418                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1419                         params->extra_ies);
1420         }
1421
1422         if (params->freqs) {
1423                 for (i = 0; params->freqs[i]; i++)
1424                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1425                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1426         }
1427
1428         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1429         msg = NULL;
1430         if (ret) {
1431                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1432                            "(%s)", ret, strerror(-ret));
1433 #ifdef HOSTAPD
1434                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1435                         /*
1436                          * mac80211 does not allow scan requests in AP mode, so
1437                          * try to do this in station mode.
1438                          */
1439                         if (wpa_driver_nl80211_set_mode(drv,
1440                                                         IEEE80211_MODE_INFRA))
1441                                 goto nla_put_failure;
1442
1443                         if (wpa_driver_nl80211_scan(drv, params)) {
1444                                 wpa_driver_nl80211_set_mode(drv,
1445                                                             IEEE80211_MODE_AP);
1446                                 goto nla_put_failure;
1447                         }
1448
1449                         /* Restore AP mode when processing scan results */
1450                         drv->ap_scan_as_station = 1;
1451                         ret = 0;
1452                 } else
1453                         goto nla_put_failure;
1454 #else /* HOSTAPD */
1455                 goto nla_put_failure;
1456 #endif /* HOSTAPD */
1457         }
1458
1459         /* Not all drivers generate "scan completed" wireless event, so try to
1460          * read results after a timeout. */
1461         timeout = 10;
1462         if (drv->scan_complete_events) {
1463                 /*
1464                  * The driver seems to deliver events to notify when scan is
1465                  * complete, so use longer timeout to avoid race conditions
1466                  * with scanning and following association request.
1467                  */
1468                 timeout = 30;
1469         }
1470         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1471                    "seconds", ret, timeout);
1472         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1473         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1474                                drv, drv->ctx);
1475
1476 nla_put_failure:
1477         nlmsg_free(ssids);
1478         nlmsg_free(msg);
1479         nlmsg_free(freqs);
1480         return ret;
1481 }
1482
1483
1484 static int bss_info_handler(struct nl_msg *msg, void *arg)
1485 {
1486         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1487         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1488         struct nlattr *bss[NL80211_BSS_MAX + 1];
1489         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1490                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1491                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1492                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1493                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1494                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1495                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1496                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1497                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1498         };
1499         struct wpa_scan_results *res = arg;
1500         struct wpa_scan_res **tmp;
1501         struct wpa_scan_res *r;
1502         const u8 *ie;
1503         size_t ie_len;
1504
1505         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1506                   genlmsg_attrlen(gnlh, 0), NULL);
1507         if (!tb[NL80211_ATTR_BSS])
1508                 return NL_SKIP;
1509         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1510                              bss_policy))
1511                 return NL_SKIP;
1512         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1513                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1514                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1515         } else {
1516                 ie = NULL;
1517                 ie_len = 0;
1518         }
1519
1520         r = os_zalloc(sizeof(*r) + ie_len);
1521         if (r == NULL)
1522                 return NL_SKIP;
1523         if (bss[NL80211_BSS_BSSID])
1524                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1525                           ETH_ALEN);
1526         if (bss[NL80211_BSS_FREQUENCY])
1527                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1528         if (bss[NL80211_BSS_BEACON_INTERVAL])
1529                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1530         if (bss[NL80211_BSS_CAPABILITY])
1531                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1532         r->flags |= WPA_SCAN_NOISE_INVALID;
1533         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1534                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1535                 r->level /= 100; /* mBm to dBm */
1536                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1537         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1538                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1539                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1540         } else
1541                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1542         if (bss[NL80211_BSS_TSF])
1543                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1544         r->ie_len = ie_len;
1545         if (ie)
1546                 os_memcpy(r + 1, ie, ie_len);
1547
1548         tmp = os_realloc(res->res,
1549                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1550         if (tmp == NULL) {
1551                 os_free(r);
1552                 return NL_SKIP;
1553         }
1554         tmp[res->num++] = r;
1555         res->res = tmp;
1556
1557         return NL_SKIP;
1558 }
1559
1560
1561 /**
1562  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1563  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1564  * Returns: Scan results on success, -1 on failure
1565  */
1566 static struct wpa_scan_results *
1567 wpa_driver_nl80211_get_scan_results(void *priv)
1568 {
1569         struct wpa_driver_nl80211_data *drv = priv;
1570         struct nl_msg *msg;
1571         struct wpa_scan_results *res;
1572         int ret;
1573
1574         res = os_zalloc(sizeof(*res));
1575         if (res == NULL)
1576                 return 0;
1577         msg = nlmsg_alloc();
1578         if (!msg)
1579                 goto nla_put_failure;
1580
1581         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1582                     NL80211_CMD_GET_SCAN, 0);
1583         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1584
1585         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1586         msg = NULL;
1587         if (ret == 0) {
1588                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1589                            (unsigned long) res->num);
1590                 return res;
1591         }
1592         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1593                    "(%s)", ret, strerror(-ret));
1594 nla_put_failure:
1595         nlmsg_free(msg);
1596         wpa_scan_results_free(res);
1597         return NULL;
1598 }
1599
1600
1601 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1602                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1603                        const u8 *seq, size_t seq_len,
1604                        const u8 *key, size_t key_len)
1605 {
1606         struct nl_msg *msg;
1607         int ret;
1608
1609         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1610                    "set_tx=%d seq_len=%lu key_len=%lu",
1611                    __func__, ifindex, alg, addr, key_idx, set_tx,
1612                    (unsigned long) seq_len, (unsigned long) key_len);
1613
1614         msg = nlmsg_alloc();
1615         if (!msg)
1616                 return -ENOMEM;
1617
1618         if (alg == WPA_ALG_NONE) {
1619                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1620                             0, NL80211_CMD_DEL_KEY, 0);
1621         } else {
1622                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1623                             0, NL80211_CMD_NEW_KEY, 0);
1624                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1625                 switch (alg) {
1626                 case WPA_ALG_WEP:
1627                         if (key_len == 5)
1628                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1629                                             0x000FAC01);
1630                         else
1631                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1632                                             0x000FAC05);
1633                         break;
1634                 case WPA_ALG_TKIP:
1635                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1636                         break;
1637                 case WPA_ALG_CCMP:
1638                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1639                         break;
1640                 case WPA_ALG_IGTK:
1641                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1642                         break;
1643                 default:
1644                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1645                                    "algorithm %d", __func__, alg);
1646                         nlmsg_free(msg);
1647                         return -1;
1648                 }
1649         }
1650
1651         if (seq)
1652                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1653
1654         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1655         {
1656                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1657                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1658         }
1659         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1660         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1661
1662         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1663         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1664                 ret = 0;
1665         if (ret)
1666                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1667                            ret, strerror(-ret));
1668
1669         /*
1670          * If we failed or don't need to set the default TX key (below),
1671          * we're done here.
1672          */
1673         if (ret || !set_tx || alg == WPA_ALG_NONE)
1674                 return ret;
1675 #ifdef HOSTAPD /* FIX: is this needed? */
1676         if (addr)
1677                 return ret;
1678 #endif /* HOSTAPD */
1679
1680         msg = nlmsg_alloc();
1681         if (!msg)
1682                 return -ENOMEM;
1683
1684         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1685                     0, NL80211_CMD_SET_KEY, 0);
1686         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1687         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1688         if (alg == WPA_ALG_IGTK)
1689                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1690         else
1691                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1692
1693         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1694         if (ret == -ENOENT)
1695                 ret = 0;
1696         if (ret)
1697                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1698                            "err=%d %s)", ret, strerror(-ret));
1699         return ret;
1700
1701 nla_put_failure:
1702         return -ENOBUFS;
1703 }
1704
1705
1706 #ifndef HOSTAPD
1707
1708 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1709                                       const u8 *addr, int key_idx,
1710                                       int set_tx, const u8 *seq,
1711                                       size_t seq_len,
1712                                       const u8 *key, size_t key_len)
1713 {
1714         struct wpa_driver_nl80211_data *drv = priv;
1715         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1716                            seq_len, key, key_len);
1717 }
1718
1719
1720 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1721                                    const u8 *addr, int cmd, u16 reason_code)
1722 {
1723         int ret = -1;
1724         struct nl_msg *msg;
1725
1726         msg = nlmsg_alloc();
1727         if (!msg)
1728                 return -1;
1729
1730         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1731
1732         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1733         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1734         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1735
1736         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1737         msg = NULL;
1738         if (ret) {
1739                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1740                            "(%s)", ret, strerror(-ret));
1741                 goto nla_put_failure;
1742         }
1743         ret = 0;
1744
1745 nla_put_failure:
1746         nlmsg_free(msg);
1747         return ret;
1748 }
1749
1750
1751 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1752                                              int reason_code)
1753 {
1754         struct wpa_driver_nl80211_data *drv = priv;
1755         wpa_printf(MSG_DEBUG, "%s", __func__);
1756         drv->associated = 0;
1757         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1758                                        reason_code);
1759 }
1760
1761
1762 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1763                                            int reason_code)
1764 {
1765         struct wpa_driver_nl80211_data *drv = priv;
1766         wpa_printf(MSG_DEBUG, "%s", __func__);
1767         drv->associated = 0;
1768         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1769                                        reason_code);
1770 }
1771
1772
1773 static int wpa_driver_nl80211_authenticate(
1774         void *priv, struct wpa_driver_auth_params *params)
1775 {
1776         struct wpa_driver_nl80211_data *drv = priv;
1777         int ret = -1, i;
1778         struct nl_msg *msg;
1779         enum nl80211_auth_type type;
1780
1781         drv->associated = 0;
1782
1783         msg = nlmsg_alloc();
1784         if (!msg)
1785                 return -1;
1786
1787         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1788                    drv->ifindex);
1789
1790         for (i = 0; i < 4; i++) {
1791                 if (!params->wep_key[i])
1792                         continue;
1793                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1794                                            i == params->wep_tx_keyidx, NULL, 0,
1795                                            params->wep_key[i],
1796                                            params->wep_key_len[i]);
1797         }
1798
1799         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1800                     NL80211_CMD_AUTHENTICATE, 0);
1801
1802         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1803         if (params->bssid) {
1804                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1805                            MAC2STR(params->bssid));
1806                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1807         }
1808         if (params->freq) {
1809                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1810                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1811         }
1812         if (params->ssid) {
1813                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1814                                   params->ssid, params->ssid_len);
1815                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1816                         params->ssid);
1817         }
1818         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1819         if (params->ie)
1820                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1821         /*
1822          * TODO: if multiple auth_alg options enabled, try them one by one if
1823          * the AP rejects authentication due to unknown auth alg
1824          */
1825         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1826                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1827         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1828                 type = NL80211_AUTHTYPE_SHARED_KEY;
1829         else if (params->auth_alg & AUTH_ALG_LEAP)
1830                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1831         else if (params->auth_alg & AUTH_ALG_FT)
1832                 type = NL80211_AUTHTYPE_FT;
1833         else
1834                 goto nla_put_failure;
1835         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1836         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1837
1838         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1839         msg = NULL;
1840         if (ret) {
1841                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1842                            "(%s)", ret, strerror(-ret));
1843                 goto nla_put_failure;
1844         }
1845         ret = 0;
1846         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1847                    "successfully");
1848
1849 nla_put_failure:
1850         nlmsg_free(msg);
1851         return ret;
1852 }
1853
1854 #endif /* HOSTAPD */
1855
1856
1857 #if defined(CONFIG_AP) || defined(HOSTAPD)
1858
1859 struct phy_info_arg {
1860         u16 *num_modes;
1861         struct hostapd_hw_modes *modes;
1862 };
1863
1864 static int phy_info_handler(struct nl_msg *msg, void *arg)
1865 {
1866         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1867         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1868         struct phy_info_arg *phy_info = arg;
1869
1870         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1871
1872         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1873         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1874                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1875                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1876                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1877                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1878                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1879                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1880         };
1881
1882         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1883         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1884                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1885                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1886         };
1887
1888         struct nlattr *nl_band;
1889         struct nlattr *nl_freq;
1890         struct nlattr *nl_rate;
1891         int rem_band, rem_freq, rem_rate;
1892         struct hostapd_hw_modes *mode;
1893         int idx, mode_is_set;
1894
1895         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1896                   genlmsg_attrlen(gnlh, 0), NULL);
1897
1898         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1899                 return NL_SKIP;
1900
1901         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1902                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1903                 if (!mode)
1904                         return NL_SKIP;
1905                 phy_info->modes = mode;
1906
1907                 mode_is_set = 0;
1908
1909                 mode = &phy_info->modes[*(phy_info->num_modes)];
1910                 memset(mode, 0, sizeof(*mode));
1911                 *(phy_info->num_modes) += 1;
1912
1913                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1914                           nla_len(nl_band), NULL);
1915
1916                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1917                         mode->ht_capab = nla_get_u16(
1918                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1919                 }
1920
1921                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1922                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1923                                   nla_len(nl_freq), freq_policy);
1924                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1925                                 continue;
1926                         mode->num_channels++;
1927                 }
1928
1929                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1930                 if (!mode->channels)
1931                         return NL_SKIP;
1932
1933                 idx = 0;
1934
1935                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1936                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1937                                   nla_len(nl_freq), freq_policy);
1938                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1939                                 continue;
1940
1941                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1942                         mode->channels[idx].flag = 0;
1943
1944                         if (!mode_is_set) {
1945                                 /* crude heuristic */
1946                                 if (mode->channels[idx].freq < 4000)
1947                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1948                                 else
1949                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1950                                 mode_is_set = 1;
1951                         }
1952
1953                         /* crude heuristic */
1954                         if (mode->channels[idx].freq < 4000)
1955                                 if (mode->channels[idx].freq == 2484)
1956                                         mode->channels[idx].chan = 14;
1957                                 else
1958                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1959                         else
1960                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1961
1962                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1963                                 mode->channels[idx].flag |=
1964                                         HOSTAPD_CHAN_DISABLED;
1965                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1966                                 mode->channels[idx].flag |=
1967                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1968                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1969                                 mode->channels[idx].flag |=
1970                                         HOSTAPD_CHAN_NO_IBSS;
1971                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1972                                 mode->channels[idx].flag |=
1973                                         HOSTAPD_CHAN_RADAR;
1974
1975                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1976                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1977                                 mode->channels[idx].max_tx_power =
1978                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1979
1980                         idx++;
1981                 }
1982
1983                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1984                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1985                                   nla_len(nl_rate), rate_policy);
1986                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1987                                 continue;
1988                         mode->num_rates++;
1989                 }
1990
1991                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1992                 if (!mode->rates)
1993                         return NL_SKIP;
1994
1995                 idx = 0;
1996
1997                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1998                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1999                                   nla_len(nl_rate), rate_policy);
2000                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2001                                 continue;
2002                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2003
2004                         /* crude heuristic */
2005                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2006                             mode->rates[idx].rate > 200)
2007                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2008
2009                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2010                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
2011
2012                         idx++;
2013                 }
2014         }
2015
2016         return NL_SKIP;
2017 }
2018
2019 static struct hostapd_hw_modes *
2020 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2021 {
2022         u16 m;
2023         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2024         int i, mode11g_idx = -1;
2025
2026         /* If only 802.11g mode is included, use it to construct matching
2027          * 802.11b mode data. */
2028
2029         for (m = 0; m < *num_modes; m++) {
2030                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2031                         return modes; /* 802.11b already included */
2032                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2033                         mode11g_idx = m;
2034         }
2035
2036         if (mode11g_idx < 0)
2037                 return modes; /* 2.4 GHz band not supported at all */
2038
2039         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2040         if (nmodes == NULL)
2041                 return modes; /* Could not add 802.11b mode */
2042
2043         mode = &nmodes[*num_modes];
2044         os_memset(mode, 0, sizeof(*mode));
2045         (*num_modes)++;
2046         modes = nmodes;
2047
2048         mode->mode = HOSTAPD_MODE_IEEE80211B;
2049
2050         mode11g = &modes[mode11g_idx];
2051         mode->num_channels = mode11g->num_channels;
2052         mode->channels = os_malloc(mode11g->num_channels *
2053                                    sizeof(struct hostapd_channel_data));
2054         if (mode->channels == NULL) {
2055                 (*num_modes)--;
2056                 return modes; /* Could not add 802.11b mode */
2057         }
2058         os_memcpy(mode->channels, mode11g->channels,
2059                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2060
2061         mode->num_rates = 0;
2062         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2063         if (mode->rates == NULL) {
2064                 os_free(mode->channels);
2065                 (*num_modes)--;
2066                 return modes; /* Could not add 802.11b mode */
2067         }
2068
2069         for (i = 0; i < mode11g->num_rates; i++) {
2070                 if (mode11g->rates[i].rate > 110 ||
2071                     mode11g->rates[i].flags &
2072                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2073                         continue;
2074                 mode->rates[mode->num_rates] = mode11g->rates[i];
2075                 mode->num_rates++;
2076                 if (mode->num_rates == 4)
2077                         break;
2078         }
2079
2080         if (mode->num_rates == 0) {
2081                 os_free(mode->channels);
2082                 os_free(mode->rates);
2083                 (*num_modes)--;
2084                 return modes; /* No 802.11b rates */
2085         }
2086
2087         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2088                    "information");
2089
2090         return modes;
2091 }
2092
2093
2094 static struct hostapd_hw_modes *
2095 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2096 {
2097         struct wpa_driver_nl80211_data *drv = priv;
2098         struct nl_msg *msg;
2099         struct phy_info_arg result = {
2100                 .num_modes = num_modes,
2101                 .modes = NULL,
2102         };
2103
2104         *num_modes = 0;
2105         *flags = 0;
2106
2107         msg = nlmsg_alloc();
2108         if (!msg)
2109                 return NULL;
2110
2111         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2112                     0, NL80211_CMD_GET_WIPHY, 0);
2113
2114         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2115
2116         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2117                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2118  nla_put_failure:
2119         return NULL;
2120 }
2121
2122
2123 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2124                                          const void *data, size_t len,
2125                                          int encrypt)
2126 {
2127         __u8 rtap_hdr[] = {
2128                 0x00, 0x00, /* radiotap version */
2129                 0x0e, 0x00, /* radiotap length */
2130                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2131                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2132                 0x00,       /* padding */
2133                 0x00, 0x00, /* RX and TX flags to indicate that */
2134                 0x00, 0x00, /* this is the injected frame directly */
2135         };
2136         struct iovec iov[2] = {
2137                 {
2138                         .iov_base = &rtap_hdr,
2139                         .iov_len = sizeof(rtap_hdr),
2140                 },
2141                 {
2142                         .iov_base = (void *) data,
2143                         .iov_len = len,
2144                 }
2145         };
2146         struct msghdr msg = {
2147                 .msg_name = NULL,
2148                 .msg_namelen = 0,
2149                 .msg_iov = iov,
2150                 .msg_iovlen = 2,
2151                 .msg_control = NULL,
2152                 .msg_controllen = 0,
2153                 .msg_flags = 0,
2154         };
2155
2156         if (encrypt)
2157                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2158
2159         return sendmsg(drv->monitor_sock, &msg, 0);
2160 }
2161
2162
2163 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2164                                         size_t data_len)
2165 {
2166         struct wpa_driver_nl80211_data *drv = priv;
2167         struct ieee80211_mgmt *mgmt;
2168         int do_not_encrypt = 0;
2169         u16 fc;
2170
2171         mgmt = (struct ieee80211_mgmt *) data;
2172         fc = le_to_host16(mgmt->frame_control);
2173
2174         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2175             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2176                 /*
2177                  * Only one of the authentication frame types is encrypted.
2178                  * In order for static WEP encryption to work properly (i.e.,
2179                  * to not encrypt the frame), we need to tell mac80211 about
2180                  * the frames that must not be encrypted.
2181                  */
2182                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2183                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2184                 if (auth_alg == WLAN_AUTH_OPEN ||
2185                     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2186                         do_not_encrypt = 1;
2187         }
2188
2189         return wpa_driver_nl80211_send_frame(drv, data, data_len,
2190                                              !do_not_encrypt);
2191 }
2192
2193
2194 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2195                                                const u8 *head, size_t head_len,
2196                                                const u8 *tail, size_t tail_len,
2197                                                int dtim_period)
2198 {
2199         struct wpa_driver_nl80211_data *drv = priv;
2200         struct nl_msg *msg;
2201         u8 cmd = NL80211_CMD_NEW_BEACON;
2202         int ret;
2203         int beacon_set;
2204 #ifdef HOSTAPD
2205         struct i802_bss *bss;
2206
2207         bss = get_bss(drv, ifindex);
2208         if (bss == NULL)
2209                 return -ENOENT;
2210         beacon_set = bss->beacon_set;
2211 #else /* HOSTAPD */
2212         beacon_set = drv->beacon_set;
2213 #endif /* HOSTAPD */
2214
2215         msg = nlmsg_alloc();
2216         if (!msg)
2217                 return -ENOMEM;
2218
2219         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2220                    beacon_set);
2221         if (beacon_set)
2222                 cmd = NL80211_CMD_SET_BEACON;
2223
2224         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2225                     0, cmd, 0);
2226         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2227         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2228         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2229         if (!drv->beacon_int)
2230                 drv->beacon_int = 100;
2231         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2232         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2233
2234         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2235         if (ret) {
2236                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2237                            ret, strerror(-ret));
2238         } else {
2239 #ifdef HOSTAPD
2240                 bss->beacon_set = 1;
2241 #else /* HOSTAPD */
2242                 drv->beacon_set = 1;
2243 #endif /* HOSTAPD */
2244         }
2245         return ret;
2246  nla_put_failure:
2247         return -ENOBUFS;
2248 }
2249
2250
2251 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2252 {
2253         struct wpa_driver_nl80211_data *drv = priv;
2254         struct nl_msg *msg;
2255
2256         drv->beacon_int = value;
2257
2258 #ifdef HOSTAPD
2259         if (!drv->bss.beacon_set)
2260                 return 0;
2261 #else /* HOSTAPD */
2262         if (!drv->beacon_set)
2263                 return 0;
2264 #endif /* HOSTAPD */
2265
2266         msg = nlmsg_alloc();
2267         if (!msg)
2268                 return -ENOMEM;
2269
2270         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2271         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2272                     0, NL80211_CMD_SET_BEACON, 0);
2273         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2274
2275         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2276
2277         return send_and_recv_msgs(drv, msg, NULL, NULL);
2278  nla_put_failure:
2279         return -ENOBUFS;
2280 }
2281
2282
2283 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2284                                        int freq, int ht_enabled,
2285                                        int sec_channel_offset)
2286 {
2287         struct nl_msg *msg;
2288         int ret;
2289
2290         msg = nlmsg_alloc();
2291         if (!msg)
2292                 return -1;
2293
2294         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2295                     NL80211_CMD_SET_WIPHY, 0);
2296
2297         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2298         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2299         if (ht_enabled) {
2300                 switch (sec_channel_offset) {
2301                 case -1:
2302                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2303                                     NL80211_CHAN_HT40MINUS);
2304                         break;
2305                 case 1:
2306                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2307                                     NL80211_CHAN_HT40PLUS);
2308                         break;
2309                 default:
2310                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2311                                     NL80211_CHAN_HT20);
2312                         break;
2313                 }
2314         }
2315
2316         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2317         if (ret == 0)
2318                 return 0;
2319         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2320                    "%d (%s)", freq, ret, strerror(-ret));
2321 nla_put_failure:
2322         return -1;
2323 }
2324
2325
2326 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2327                                       struct hostapd_sta_add_params *params)
2328 {
2329         struct wpa_driver_nl80211_data *drv = priv;
2330         struct nl_msg *msg;
2331         int ret = -ENOBUFS;
2332
2333         msg = nlmsg_alloc();
2334         if (!msg)
2335                 return -ENOMEM;
2336
2337         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2338                     0, NL80211_CMD_NEW_STATION, 0);
2339
2340         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2341         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2342         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2343         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2344                 params->supp_rates);
2345         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2346                     params->listen_interval);
2347
2348 #ifdef CONFIG_IEEE80211N
2349         if (params->ht_capabilities) {
2350                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2351                         params->ht_capabilities->length,
2352                         &params->ht_capabilities->data);
2353         }
2354 #endif /* CONFIG_IEEE80211N */
2355
2356         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2357         if (ret)
2358                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2359                            "result: %d (%s)", ret, strerror(-ret));
2360         if (ret == -EEXIST)
2361                 ret = 0;
2362  nla_put_failure:
2363         return ret;
2364 }
2365
2366
2367 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2368 {
2369         struct wpa_driver_nl80211_data *drv = priv;
2370         struct nl_msg *msg;
2371         int ret;
2372
2373         msg = nlmsg_alloc();
2374         if (!msg)
2375                 return -ENOMEM;
2376
2377         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2378                     0, NL80211_CMD_DEL_STATION, 0);
2379
2380         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2381                     if_nametoindex(drv->ifname));
2382         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2383
2384         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2385         if (ret == -ENOENT)
2386                 return 0;
2387         return ret;
2388  nla_put_failure:
2389         return -ENOBUFS;
2390 }
2391
2392 #endif /* CONFIG_AP || HOSTAPD */
2393
2394
2395 #ifdef CONFIG_AP
2396
2397 static int wpa_driver_nl80211_set_beacon(void *priv,
2398                                          const u8 *head, size_t head_len,
2399                                          const u8 *tail, size_t tail_len,
2400                                          int dtim_period)
2401 {
2402         struct wpa_driver_nl80211_data *drv = priv;
2403         return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2404                                                    head, head_len,
2405                                                    tail, tail_len,
2406                                                    dtim_period);
2407 }
2408
2409 #endif /* CONFIG_AP */
2410
2411 #if defined(CONFIG_AP) || defined(HOSTAPD)
2412
2413 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2414                                  int ifidx)
2415 {
2416         struct nl_msg *msg;
2417
2418 #ifdef HOSTAPD
2419         /* stop listening for EAPOL on this interface */
2420         del_ifidx(drv, ifidx);
2421 #endif /* HOSTAPD */
2422
2423         msg = nlmsg_alloc();
2424         if (!msg)
2425                 goto nla_put_failure;
2426
2427         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2428                     0, NL80211_CMD_DEL_INTERFACE, 0);
2429         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2430
2431         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2432                 return;
2433  nla_put_failure:
2434         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2435                    ifidx);
2436 }
2437
2438
2439 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2440                                 const char *ifname, enum nl80211_iftype iftype,
2441                                 const u8 *addr)
2442 {
2443         struct nl_msg *msg, *flags = NULL;
2444         int ifidx;
2445         int ret = -ENOBUFS;
2446
2447         msg = nlmsg_alloc();
2448         if (!msg)
2449                 return -1;
2450
2451         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2452                     0, NL80211_CMD_NEW_INTERFACE, 0);
2453         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2454         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2455         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2456
2457         if (iftype == NL80211_IFTYPE_MONITOR) {
2458                 int err;
2459
2460                 flags = nlmsg_alloc();
2461                 if (!flags)
2462                         goto nla_put_failure;
2463
2464                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2465
2466                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2467
2468                 nlmsg_free(flags);
2469
2470                 if (err)
2471                         goto nla_put_failure;
2472         }
2473
2474         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2475         if (ret) {
2476  nla_put_failure:
2477                 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2478                            ifname);
2479                 return ret;
2480         }
2481
2482         ifidx = if_nametoindex(ifname);
2483
2484         if (ifidx <= 0)
2485                 return -1;
2486
2487 #ifdef HOSTAPD
2488         /* start listening for EAPOL on this interface */
2489         add_ifidx(drv, ifidx);
2490
2491         if (addr && iftype == NL80211_IFTYPE_AP &&
2492             set_ifhwaddr(drv, ifname, addr)) {
2493                 nl80211_remove_iface(drv, ifidx);
2494                 return -1;
2495         }
2496 #endif /* HOSTAPD */
2497
2498         return ifidx;
2499 }
2500
2501 #endif /* CONFIG_AP || HOSTAPD */
2502
2503 #ifdef CONFIG_AP
2504
2505 void ap_tx_status(void *ctx, const u8 *addr,
2506                   const u8 *buf, size_t len, int ack);
2507 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2508 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2509                 struct hostapd_frame_info *fi);
2510 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2511
2512 #endif /* CONFIG_AP */
2513
2514 #if defined(CONFIG_AP) || defined(HOSTAPD)
2515
2516 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2517 {
2518         struct ieee80211_hdr *hdr;
2519         u16 fc, type, stype;
2520
2521         hdr = (struct ieee80211_hdr *) buf;
2522         fc = le_to_host16(hdr->frame_control);
2523
2524         type = WLAN_FC_GET_TYPE(fc);
2525         stype = WLAN_FC_GET_STYPE(fc);
2526
2527         switch (type) {
2528         case WLAN_FC_TYPE_MGMT:
2529                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2530                            ok ? "ACK" : "fail");
2531 #ifdef HOSTAPD
2532                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2533 #else /* HOSTAPD */
2534                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2535 #endif /* HOSTAPD */
2536                 break;
2537         case WLAN_FC_TYPE_CTRL:
2538                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2539                            ok ? "ACK" : "fail");
2540                 break;
2541         case WLAN_FC_TYPE_DATA:
2542 #ifdef HOSTAPD
2543                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2544 #else /* HOSTAPD */
2545                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2546 #endif /* HOSTAPD */
2547                 break;
2548         default:
2549                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2550                            type);
2551                 break;
2552         }
2553 }
2554
2555
2556 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2557                              struct ieee80211_hdr *hdr, size_t len)
2558 {
2559 #ifdef HOSTAPD
2560         hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2561 #else /* HOSTAPD */
2562         ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2563 #endif /* HOSTAPD */
2564 }
2565
2566
2567 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2568                          u8 *buf, size_t len,
2569                          struct hostapd_frame_info *hfi)
2570 {
2571         struct ieee80211_hdr *hdr;
2572         u16 fc, stype;
2573
2574         hdr = (struct ieee80211_hdr *) buf;
2575         fc = le_to_host16(hdr->frame_control);
2576         stype = WLAN_FC_GET_STYPE(fc);
2577
2578         switch (WLAN_FC_GET_TYPE(fc)) {
2579         case WLAN_FC_TYPE_MGMT:
2580                 if (stype != WLAN_FC_STYPE_BEACON &&
2581                     stype != WLAN_FC_STYPE_PROBE_REQ)
2582                         wpa_printf(MSG_MSGDUMP, "MGMT");
2583 #ifdef HOSTAPD
2584                 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2585 #else /* HOSTAPD */
2586                 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2587 #endif /* HOSTAPD */
2588                 break;
2589         case WLAN_FC_TYPE_CTRL:
2590                 /* can only get here with PS-Poll frames */
2591                 wpa_printf(MSG_DEBUG, "CTRL");
2592                 from_unknown_sta(drv, hdr, len);
2593                 break;
2594         case WLAN_FC_TYPE_DATA:
2595                 from_unknown_sta(drv, hdr, len);
2596                 break;
2597         }
2598 }
2599
2600
2601 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2602 {
2603         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2604         int len;
2605         unsigned char buf[3000];
2606         struct ieee80211_radiotap_iterator iter;
2607         int ret;
2608         struct hostapd_frame_info hfi;
2609         int injected = 0, failed = 0, rxflags = 0;
2610
2611         len = recv(sock, buf, sizeof(buf), 0);
2612         if (len < 0) {
2613                 perror("recv");
2614                 return;
2615         }
2616
2617         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2618                 printf("received invalid radiotap frame\n");
2619                 return;
2620         }
2621
2622         memset(&hfi, 0, sizeof(hfi));
2623
2624         while (1) {
2625                 ret = ieee80211_radiotap_iterator_next(&iter);
2626                 if (ret == -ENOENT)
2627                         break;
2628                 if (ret) {
2629                         printf("received invalid radiotap frame (%d)\n", ret);
2630                         return;
2631                 }
2632                 switch (iter.this_arg_index) {
2633                 case IEEE80211_RADIOTAP_FLAGS:
2634                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2635                                 len -= 4;
2636                         break;
2637                 case IEEE80211_RADIOTAP_RX_FLAGS:
2638                         rxflags = 1;
2639                         break;
2640                 case IEEE80211_RADIOTAP_TX_FLAGS:
2641                         injected = 1;
2642                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2643                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2644                         break;
2645                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2646                         break;
2647                 case IEEE80211_RADIOTAP_CHANNEL:
2648                         /* TODO convert from freq/flags to channel number
2649                         hfi.channel = XXX;
2650                         hfi.phytype = XXX;
2651                          */
2652                         break;
2653                 case IEEE80211_RADIOTAP_RATE:
2654                         hfi.datarate = *iter.this_arg * 5;
2655                         break;
2656                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2657                         hfi.ssi_signal = *iter.this_arg;
2658                         break;
2659                 }
2660         }
2661
2662         if (rxflags && injected)
2663                 return;
2664
2665         if (!injected)
2666                 handle_frame(drv, buf + iter.max_length,
2667                              len - iter.max_length, &hfi);
2668         else
2669                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2670                                    len - iter.max_length, !failed);
2671 }
2672
2673
2674 /*
2675  * we post-process the filter code later and rewrite
2676  * this to the offset to the last instruction
2677  */
2678 #define PASS    0xFF
2679 #define FAIL    0xFE
2680
2681 static struct sock_filter msock_filter_insns[] = {
2682         /*
2683          * do a little-endian load of the radiotap length field
2684          */
2685         /* load lower byte into A */
2686         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2687         /* put it into X (== index register) */
2688         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2689         /* load upper byte into A */
2690         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2691         /* left-shift it by 8 */
2692         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2693         /* or with X */
2694         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2695         /* put result into X */
2696         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2697
2698         /*
2699          * Allow management frames through, this also gives us those
2700          * management frames that we sent ourselves with status
2701          */
2702         /* load the lower byte of the IEEE 802.11 frame control field */
2703         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2704         /* mask off frame type and version */
2705         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2706         /* accept frame if it's both 0, fall through otherwise */
2707         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2708
2709         /*
2710          * TODO: add a bit to radiotap RX flags that indicates
2711          * that the sending station is not associated, then
2712          * add a filter here that filters on our DA and that flag
2713          * to allow us to deauth frames to that bad station.
2714          *
2715          * Not a regression -- we didn't do it before either.
2716          */
2717
2718 #if 0
2719         /*
2720          * drop non-data frames, WDS frames
2721          */
2722         /* load the lower byte of the frame control field */
2723         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2724         /* mask off QoS bit */
2725         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2726         /* drop non-data frames */
2727         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2728         /* load the upper byte of the frame control field */
2729         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2730         /* mask off toDS/fromDS */
2731         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2732         /* drop WDS frames */
2733         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2734 #endif
2735
2736         /*
2737          * add header length to index
2738          */
2739         /* load the lower byte of the frame control field */
2740         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2741         /* mask off QoS bit */
2742         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2743         /* right shift it by 6 to give 0 or 2 */
2744         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2745         /* add data frame header length */
2746         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2747         /* add index, was start of 802.11 header */
2748         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2749         /* move to index, now start of LL header */
2750         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2751
2752         /*
2753          * Accept empty data frames, we use those for
2754          * polling activity.
2755          */
2756         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2757         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2758
2759         /*
2760          * Accept EAPOL frames
2761          */
2762         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2763         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2764         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2765         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2766
2767         /* keep these last two statements or change the code below */
2768         /* return 0 == "DROP" */
2769         BPF_STMT(BPF_RET | BPF_K, 0),
2770         /* return ~0 == "keep all" */
2771         BPF_STMT(BPF_RET | BPF_K, ~0),
2772 };
2773
2774 static struct sock_fprog msock_filter = {
2775         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2776         .filter = msock_filter_insns,
2777 };
2778
2779
2780 static int add_monitor_filter(int s)
2781 {
2782         int idx;
2783
2784         /* rewrite all PASS/FAIL jump offsets */
2785         for (idx = 0; idx < msock_filter.len; idx++) {
2786                 struct sock_filter *insn = &msock_filter_insns[idx];
2787
2788                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2789                         if (insn->code == (BPF_JMP|BPF_JA)) {
2790                                 if (insn->k == PASS)
2791                                         insn->k = msock_filter.len - idx - 2;
2792                                 else if (insn->k == FAIL)
2793                                         insn->k = msock_filter.len - idx - 3;
2794                         }
2795
2796                         if (insn->jt == PASS)
2797                                 insn->jt = msock_filter.len - idx - 2;
2798                         else if (insn->jt == FAIL)
2799                                 insn->jt = msock_filter.len - idx - 3;
2800
2801                         if (insn->jf == PASS)
2802                                 insn->jf = msock_filter.len - idx - 2;
2803                         else if (insn->jf == FAIL)
2804                                 insn->jf = msock_filter.len - idx - 3;
2805                 }
2806         }
2807
2808         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2809                        &msock_filter, sizeof(msock_filter))) {
2810                 perror("SO_ATTACH_FILTER");
2811                 return -1;
2812         }
2813
2814         return 0;
2815 }
2816
2817
2818 static void nl80211_remove_monitor_interface(
2819         struct wpa_driver_nl80211_data *drv)
2820 {
2821         if (drv->monitor_ifidx >= 0) {
2822                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2823                 drv->monitor_ifidx = -1;
2824         }
2825 }
2826
2827
2828 static int
2829 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2830 {
2831         char buf[IFNAMSIZ];
2832         struct sockaddr_ll ll;
2833         int optval;
2834         socklen_t optlen;
2835
2836         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2837         buf[IFNAMSIZ - 1] = '\0';
2838
2839         drv->monitor_ifidx =
2840                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2841
2842         if (drv->monitor_ifidx < 0)
2843                 return -1;
2844
2845         if (hostapd_set_iface_flags(drv, buf, 1))
2846                 goto error;
2847
2848         memset(&ll, 0, sizeof(ll));
2849         ll.sll_family = AF_PACKET;
2850         ll.sll_ifindex = drv->monitor_ifidx;
2851         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2852         if (drv->monitor_sock < 0) {
2853                 perror("socket[PF_PACKET,SOCK_RAW]");
2854                 goto error;
2855         }
2856
2857         if (add_monitor_filter(drv->monitor_sock)) {
2858                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2859                            "interface; do filtering in user space");
2860                 /* This works, but will cost in performance. */
2861         }
2862
2863         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2864                 perror("monitor socket bind");
2865                 goto error;
2866         }
2867
2868         optlen = sizeof(optval);
2869         optval = 20;
2870         if (setsockopt
2871             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2872                 perror("Failed to set socket priority");
2873                 goto error;
2874         }
2875
2876         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2877                                      drv, NULL)) {
2878                 printf("Could not register monitor read socket\n");
2879                 goto error;
2880         }
2881
2882         return 0;
2883  error:
2884         nl80211_remove_monitor_interface(drv);
2885         return -1;
2886 }
2887
2888 #endif /* CONFIG_AP || HOSTAPD */
2889
2890 #ifdef CONFIG_AP
2891
2892 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2893                                  struct wpa_driver_associate_params *params)
2894 {
2895         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2896             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
2897                 nl80211_remove_monitor_interface(drv);
2898                 return -1;
2899         }
2900
2901         /* TODO: setup monitor interface (and add code somewhere to remove this
2902          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2903
2904         return 0;
2905 }
2906 #endif /* CONFIG_AP */
2907
2908
2909 #ifndef HOSTAPD
2910 static int wpa_driver_nl80211_associate(
2911         void *priv, struct wpa_driver_associate_params *params)
2912 {
2913         struct wpa_driver_nl80211_data *drv = priv;
2914         int ret = -1;
2915         struct nl_msg *msg;
2916
2917 #ifdef CONFIG_AP
2918         if (params->mode == 2)
2919                 return wpa_driver_nl80211_ap(drv, params);
2920 #endif /* CONFIG_AP */
2921
2922 #ifndef NO_WEXT
2923         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2924                                           params->drop_unencrypted);
2925 #endif /* NO_WEXT */
2926
2927         drv->associated = 0;
2928
2929         msg = nlmsg_alloc();
2930         if (!msg)
2931                 return -1;
2932
2933         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2934                    drv->ifindex);
2935         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2936                     NL80211_CMD_ASSOCIATE, 0);
2937
2938         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2939         if (params->bssid) {
2940                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2941                            MAC2STR(params->bssid));
2942                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2943         }
2944         if (params->freq) {
2945                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2946                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2947         }
2948         if (params->ssid) {
2949                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2950                                   params->ssid, params->ssid_len);
2951                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2952                         params->ssid);
2953                 if (params->ssid_len > sizeof(drv->ssid))
2954                         goto nla_put_failure;
2955                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2956                 drv->ssid_len = params->ssid_len;
2957         }
2958         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
2959         if (params->wpa_ie)
2960                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2961                         params->wpa_ie);
2962
2963         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2964         msg = NULL;
2965         if (ret) {
2966                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2967                            "(%s)", ret, strerror(-ret));
2968                 goto nla_put_failure;
2969         }
2970         ret = 0;
2971         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2972                    "successfully");
2973
2974 nla_put_failure:
2975         nlmsg_free(msg);
2976         return ret;
2977 }
2978 #endif /* HOSTAPD */
2979
2980
2981 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2982                             int ifindex, int mode)
2983 {
2984         struct nl_msg *msg;
2985         int ret = -ENOBUFS;
2986
2987         msg = nlmsg_alloc();
2988         if (!msg)
2989                 return -ENOMEM;
2990
2991         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2992                     0, NL80211_CMD_SET_INTERFACE, 0);
2993         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2994         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
2995
2996         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2997         if (!ret)
2998                 return 0;
2999 nla_put_failure:
3000         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3001                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3002         return ret;
3003 }
3004
3005
3006 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3007 {
3008         struct wpa_driver_nl80211_data *drv = priv;
3009         int ret = -1;
3010         int nlmode;
3011
3012         switch (mode) {
3013         case 0:
3014                 nlmode = NL80211_IFTYPE_STATION;
3015                 break;
3016         case 1:
3017                 nlmode = NL80211_IFTYPE_ADHOC;
3018                 break;
3019         case 2:
3020                 nlmode = NL80211_IFTYPE_AP;
3021                 break;
3022         default:
3023                 return -1;
3024         }
3025
3026         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3027                 drv->nlmode = nlmode;
3028                 ret = 0;
3029                 goto done;
3030         }
3031
3032         if (nlmode == drv->nlmode) {
3033                 ret = 0;
3034                 goto done; /* Already in the requested mode */
3035         }
3036
3037         /* mac80211 doesn't allow mode changes while the device is up, so
3038          * take the device down, try to set the mode again, and bring the
3039          * device back up.
3040          */
3041         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3042                 /* Try to set the mode again while the interface is down */
3043                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3044                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3045                         ret = -1;
3046         }
3047
3048         if (!ret)
3049                 drv->nlmode = nlmode;
3050
3051 done:
3052 #if defined(CONFIG_AP) || defined(HOSTAPD)
3053         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3054                 /* Setup additional AP mode functionality if needed */
3055                 if (drv->monitor_ifidx < 0 &&
3056                     nl80211_create_monitor_interface(drv))
3057                         return -1;
3058         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3059                 /* Remove additional AP mode functionality */
3060                 nl80211_remove_monitor_interface(drv);
3061         }
3062 #endif /* CONFIG_AP || HOSTAPD */
3063
3064         return ret;
3065 }
3066
3067
3068 #ifndef HOSTAPD
3069
3070 static int wpa_driver_nl80211_get_capa(void *priv,
3071                                        struct wpa_driver_capa *capa)
3072 {
3073         struct wpa_driver_nl80211_data *drv = priv;
3074         if (!drv->has_capability)
3075                 return -1;
3076         os_memcpy(capa, &drv->capa, sizeof(*capa));
3077         return 0;
3078 }
3079
3080
3081 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3082 {
3083         struct wpa_driver_nl80211_data *drv = priv;
3084
3085         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3086                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3087         drv->operstate = state;
3088         return wpa_driver_nl80211_send_oper_ifla(
3089                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3090 }
3091
3092 #endif /* HOSTAPD */
3093
3094
3095 #ifdef HOSTAPD
3096
3097 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3098
3099
3100 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3101                                  int ifindex)
3102 {
3103         struct i802_bss *bss = &drv->bss;
3104         while (bss) {
3105                 if (ifindex == bss->ifindex)
3106                         return bss;
3107                 bss = bss->next;
3108         }
3109         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3110         return NULL;
3111 }
3112
3113
3114 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3115 {
3116         int i;
3117         int *old;
3118
3119         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3120                    ifidx);
3121         for (i = 0; i < drv->num_if_indices; i++) {
3122                 if (drv->if_indices[i] == 0) {
3123                         drv->if_indices[i] = ifidx;
3124                         return;
3125                 }
3126         }
3127
3128         if (drv->if_indices != drv->default_if_indices)
3129                 old = drv->if_indices;
3130         else
3131                 old = NULL;
3132
3133         drv->if_indices = realloc(old,
3134                                   sizeof(int) * (drv->num_if_indices + 1));
3135         if (!drv->if_indices) {
3136                 if (!old)
3137                         drv->if_indices = drv->default_if_indices;
3138                 else
3139                         drv->if_indices = old;
3140                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3141                            "interfaces");
3142                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3143                 return;
3144         }
3145         drv->if_indices[drv->num_if_indices] = ifidx;
3146         drv->num_if_indices++;
3147 }
3148
3149
3150 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3151 {
3152         int i;
3153
3154         for (i = 0; i < drv->num_if_indices; i++) {
3155                 if (drv->if_indices[i] == ifidx) {
3156                         drv->if_indices[i] = 0;
3157                         break;
3158                 }
3159         }
3160 }
3161
3162
3163 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3164 {
3165         int i;
3166
3167         for (i = 0; i < drv->num_if_indices; i++)
3168                 if (drv->if_indices[i] == ifidx)
3169                         return 1;
3170
3171         return 0;
3172 }
3173
3174
3175 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3176                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3177                         size_t seq_len, const u8 *key, size_t key_len)
3178 {
3179         struct wpa_driver_nl80211_data *drv = priv;
3180         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3181                            set_tx, seq, seq_len, key, key_len);
3182 }
3183
3184
3185 static inline int min_int(int a, int b)
3186 {
3187         if (a < b)
3188                 return a;
3189         return b;
3190 }
3191
3192
3193 static int get_key_handler(struct nl_msg *msg, void *arg)
3194 {
3195         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3196         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3197
3198         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3199                   genlmsg_attrlen(gnlh, 0), NULL);
3200
3201         /*
3202          * TODO: validate the key index and mac address!
3203          * Otherwise, there's a race condition as soon as
3204          * the kernel starts sending key notifications.
3205          */
3206
3207         if (tb[NL80211_ATTR_KEY_SEQ])
3208                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3209                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3210         return NL_SKIP;
3211 }
3212
3213
3214 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3215                            int idx, u8 *seq)
3216 {
3217         struct wpa_driver_nl80211_data *drv = priv;
3218         struct nl_msg *msg;
3219
3220         msg = nlmsg_alloc();
3221         if (!msg)
3222                 return -ENOMEM;
3223
3224         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3225                     0, NL80211_CMD_GET_KEY, 0);
3226
3227         if (addr)
3228                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3229         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3230         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3231
3232         memset(seq, 0, 6);
3233
3234         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3235  nla_put_failure:
3236         return -ENOBUFS;
3237 }
3238
3239
3240 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3241                               int mode)
3242 {
3243         struct wpa_driver_nl80211_data *drv = priv;
3244         struct nl_msg *msg;
3245         u8 rates[NL80211_MAX_SUPP_RATES];
3246         u8 rates_len = 0;
3247         int i;
3248
3249         msg = nlmsg_alloc();
3250         if (!msg)
3251                 return -ENOMEM;
3252
3253         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3254                     NL80211_CMD_SET_BSS, 0);
3255
3256         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3257                 rates[rates_len++] = basic_rates[i] / 5;
3258
3259         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3260
3261         /* TODO: multi-BSS support */
3262         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3263
3264         return send_and_recv_msgs(drv, msg, NULL, NULL);
3265  nla_put_failure:
3266         return -ENOBUFS;
3267 }
3268
3269
3270 /* Set kernel driver on given frequency (MHz) */
3271 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3272 {
3273         struct wpa_driver_nl80211_data *drv = priv;
3274         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3275                                            freq->sec_channel_offset);
3276 }
3277
3278
3279 static int i802_set_rts(void *priv, int rts)
3280 {
3281 #ifdef NO_WEXT
3282         return -1;
3283 #else /* NO_WEXT */
3284         struct wpa_driver_nl80211_data *drv = priv;
3285         struct iwreq iwr;
3286
3287         memset(&iwr, 0, sizeof(iwr));
3288         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3289         iwr.u.rts.value = rts;
3290         iwr.u.rts.fixed = 1;
3291
3292         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3293                 perror("ioctl[SIOCSIWRTS]");
3294                 return -1;
3295         }
3296
3297         return 0;
3298 #endif /* NO_WEXT */
3299 }
3300
3301
3302 static int i802_set_frag(void *priv, int frag)
3303 {
3304 #ifdef NO_WEXT
3305         return -1;
3306 #else /* NO_WEXT */
3307         struct wpa_driver_nl80211_data *drv = priv;
3308         struct iwreq iwr;
3309
3310         memset(&iwr, 0, sizeof(iwr));
3311         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3312         iwr.u.frag.value = frag;
3313         iwr.u.frag.fixed = 1;
3314
3315         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3316                 perror("ioctl[SIOCSIWFRAG]");
3317                 return -1;
3318         }
3319
3320         return 0;
3321 #endif /* NO_WEXT */
3322 }
3323
3324
3325 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3326 {
3327 #ifdef NO_WEXT
3328         return -1;
3329 #else /* NO_WEXT */
3330         struct wpa_driver_nl80211_data *drv = priv;
3331         struct iwreq iwr;
3332
3333         memset(&iwr, 0, sizeof(iwr));
3334         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3335
3336         iwr.u.retry.value = short_retry;
3337         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3338         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3339                 perror("ioctl[SIOCSIWRETRY(short)]");
3340                 return -1;
3341         }
3342
3343         iwr.u.retry.value = long_retry;
3344         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3345         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3346                 perror("ioctl[SIOCSIWRETRY(long)]");
3347                 return -1;
3348         }
3349
3350         return 0;
3351 #endif /* NO_WEXT */
3352 }
3353
3354
3355 static int i802_flush(void *priv)
3356 {
3357         struct wpa_driver_nl80211_data *drv = priv;
3358         struct nl_msg *msg;
3359
3360         msg = nlmsg_alloc();
3361         if (!msg)
3362                 return -1;
3363
3364         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3365                     0, NL80211_CMD_DEL_STATION, 0);
3366
3367         /*
3368          * XXX: FIX! this needs to flush all VLANs too
3369          */
3370         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3371                     if_nametoindex(drv->ifname));
3372
3373         return send_and_recv_msgs(drv, msg, NULL, NULL);
3374  nla_put_failure:
3375         return -ENOBUFS;
3376 }
3377
3378
3379 static int get_sta_handler(struct nl_msg *msg, void *arg)
3380 {
3381         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3382         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3383         struct hostap_sta_driver_data *data = arg;
3384         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3385         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3386                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3387                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3388                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3389                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3390                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3391         };
3392
3393         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3394                   genlmsg_attrlen(gnlh, 0), NULL);
3395
3396         /*
3397          * TODO: validate the interface and mac address!
3398          * Otherwise, there's a race condition as soon as
3399          * the kernel starts sending station notifications.
3400          */
3401
3402         if (!tb[NL80211_ATTR_STA_INFO]) {
3403                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3404                 return NL_SKIP;
3405         }
3406         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3407                              tb[NL80211_ATTR_STA_INFO],
3408                              stats_policy)) {
3409                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3410                 return NL_SKIP;
3411         }
3412
3413         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3414                 data->inactive_msec =
3415                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3416         if (stats[NL80211_STA_INFO_RX_BYTES])
3417                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3418         if (stats[NL80211_STA_INFO_TX_BYTES])
3419                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3420         if (stats[NL80211_STA_INFO_RX_PACKETS])
3421                 data->rx_packets =
3422                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3423         if (stats[NL80211_STA_INFO_TX_PACKETS])
3424                 data->tx_packets =
3425                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3426
3427         return NL_SKIP;
3428 }
3429
3430 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3431                               const u8 *addr)
3432 {
3433         struct wpa_driver_nl80211_data *drv = priv;
3434         struct nl_msg *msg;
3435
3436         os_memset(data, 0, sizeof(*data));
3437         msg = nlmsg_alloc();
3438         if (!msg)
3439                 return -ENOMEM;
3440
3441         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3442                     0, NL80211_CMD_GET_STATION, 0);
3443
3444         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3445         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3446
3447         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3448  nla_put_failure:
3449         return -ENOBUFS;
3450 }
3451
3452
3453 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3454                            size_t data_len, int encrypt, const u8 *own_addr)
3455 {
3456         struct wpa_driver_nl80211_data *drv = priv;
3457         struct ieee80211_hdr *hdr;
3458         size_t len;
3459         u8 *pos;
3460         int res;
3461 #if 0 /* FIX */
3462         int qos = sta->flags & WLAN_STA_WME;
3463 #else
3464         int qos = 0;
3465 #endif
3466
3467         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3468                 data_len;
3469         hdr = os_zalloc(len);
3470         if (hdr == NULL) {
3471                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3472                        (unsigned long) len);
3473                 return -1;
3474         }
3475
3476         hdr->frame_control =
3477                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3478         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3479         if (encrypt)
3480                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3481 #if 0 /* To be enabled if qos determination is added above */
3482         if (qos) {
3483                 hdr->frame_control |=
3484                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3485         }
3486 #endif
3487
3488         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3489         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3490         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3491         pos = (u8 *) (hdr + 1);
3492
3493 #if 0 /* To be enabled if qos determination is added above */
3494         if (qos) {
3495                 /* add an empty QoS header if needed */
3496                 pos[0] = 0;
3497                 pos[1] = 0;
3498                 pos += 2;
3499         }
3500 #endif
3501
3502         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3503         pos += sizeof(rfc1042_header);
3504         WPA_PUT_BE16(pos, ETH_P_PAE);
3505         pos += 2;
3506         memcpy(pos, data, data_len);
3507
3508         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3509         if (res < 0) {
3510                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3511                            "failed: %d (%s)",
3512                            (unsigned long) len, errno, strerror(errno));
3513         }
3514         free(hdr);
3515
3516         return res;
3517 }
3518
3519
3520 static int i802_sta_set_flags(void *priv, const u8 *addr,
3521                               int total_flags, int flags_or, int flags_and)
3522 {
3523         struct wpa_driver_nl80211_data *drv = priv;
3524         struct nl_msg *msg, *flags = NULL;
3525
3526         msg = nlmsg_alloc();
3527         if (!msg)
3528                 return -ENOMEM;
3529
3530         flags = nlmsg_alloc();
3531         if (!flags) {
3532                 nlmsg_free(msg);
3533                 return -ENOMEM;
3534         }
3535
3536         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3537                     0, NL80211_CMD_SET_STATION, 0);
3538
3539         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3540                     if_nametoindex(drv->ifname));
3541         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3542
3543         if (total_flags & WLAN_STA_AUTHORIZED)
3544                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3545
3546         if (total_flags & WLAN_STA_WMM)
3547                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3548
3549         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3550                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3551
3552         if (total_flags & WLAN_STA_MFP)
3553                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3554
3555         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3556                 goto nla_put_failure;
3557
3558         nlmsg_free(flags);
3559
3560         return send_and_recv_msgs(drv, msg, NULL, NULL);
3561  nla_put_failure:
3562         nlmsg_free(flags);
3563         return -ENOBUFS;
3564 }
3565
3566
3567 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3568                                     int cw_min, int cw_max, int burst_time)
3569 {
3570         struct wpa_driver_nl80211_data *drv = priv;
3571         struct nl_msg *msg;
3572         struct nlattr *txq, *params;
3573
3574         msg = nlmsg_alloc();
3575         if (!msg)
3576                 return -1;
3577
3578         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3579                     0, NL80211_CMD_SET_WIPHY, 0);
3580
3581         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3582
3583         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3584         if (!txq)
3585                 goto nla_put_failure;
3586
3587         /* We are only sending parameters for a single TXQ at a time */
3588         params = nla_nest_start(msg, 1);
3589         if (!params)
3590                 goto nla_put_failure;
3591
3592         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3593         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3594          * 32 usec, so need to convert the value here. */
3595         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3596         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3597         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3598         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3599
3600         nla_nest_end(msg, params);
3601
3602         nla_nest_end(msg, txq);
3603
3604         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3605                 return 0;
3606  nla_put_failure:
3607         return -1;
3608 }
3609
3610
3611 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3612 {
3613         struct wpa_driver_nl80211_data *drv = priv;
3614         int ifidx;
3615         struct i802_bss *bss;
3616
3617         bss = os_zalloc(sizeof(*bss));
3618         if (bss == NULL)
3619                 return -1;
3620
3621         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3622         if (ifidx < 0) {
3623                 os_free(bss);
3624                 return -1;
3625         }
3626         bss->ifindex = ifidx;
3627         if (hostapd_set_iface_flags(priv, ifname, 1)) {
3628                 nl80211_remove_iface(priv, ifidx);
3629                 os_free(bss);
3630                 return -1;
3631         }
3632         bss->next = drv->bss.next;
3633         drv->bss.next = bss;
3634         return 0;
3635 }
3636
3637
3638 static int i802_bss_remove(void *priv, const char *ifname)
3639 {
3640         struct wpa_driver_nl80211_data *drv = priv;
3641         struct i802_bss *bss, *prev;
3642         int ifindex = if_nametoindex(ifname);
3643         nl80211_remove_iface(priv, ifindex);
3644         prev = &drv->bss;
3645         bss = drv->bss.next;
3646         while (bss) {
3647                 if (ifindex == bss->ifindex) {
3648                         prev->next = bss->next;
3649                         os_free(bss);
3650                         break;
3651                 }
3652                 prev = bss;
3653                 bss = bss->next;
3654         }
3655         return 0;
3656 }
3657
3658
3659 static int i802_set_beacon(const char *iface, void *priv,
3660                            const u8 *head, size_t head_len,
3661                            const u8 *tail, size_t tail_len, int dtim_period)
3662 {
3663         return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3664                                                    head, head_len,
3665                                                    tail, tail_len,
3666                                                    dtim_period);
3667 }
3668
3669
3670 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3671 {
3672         struct wpa_driver_nl80211_data *drv = priv;
3673         struct nl_msg *msg;
3674
3675         msg = nlmsg_alloc();
3676         if (!msg)
3677                 return -ENOMEM;
3678
3679         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3680                     NL80211_CMD_SET_BSS, 0);
3681
3682         if (cts >= 0)
3683                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3684         if (preamble >= 0)
3685                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3686         if (slot >= 0)
3687                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3688
3689         /* TODO: multi-BSS support */
3690         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3691
3692         return send_and_recv_msgs(drv, msg, NULL, NULL);
3693  nla_put_failure:
3694         return -ENOBUFS;
3695 }
3696
3697
3698 static int i802_set_cts_protect(void *priv, int value)
3699 {
3700         return i802_set_bss(priv, value, -1, -1);
3701 }
3702
3703
3704 static int i802_set_preamble(void *priv, int value)
3705 {
3706         return i802_set_bss(priv, -1, value, -1);
3707 }
3708
3709
3710 static int i802_set_short_slot_time(void *priv, int value)
3711 {
3712         return i802_set_bss(priv, -1, -1, value);
3713 }
3714
3715
3716 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3717 {
3718         switch (type) {
3719         case HOSTAPD_IF_VLAN:
3720                 return NL80211_IFTYPE_AP_VLAN;
3721         }
3722         return -1;
3723 }
3724
3725
3726 static int i802_if_add(const char *iface, void *priv,
3727                        enum hostapd_driver_if_type type, char *ifname,
3728                        const u8 *addr)
3729 {
3730         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3731                 return -1;
3732         return 0;
3733 }
3734
3735
3736 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3737                           char *ifname, const u8 *addr)
3738 {
3739         /* unused at the moment */
3740         return -1;
3741 }
3742
3743
3744 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3745                           const char *ifname, const u8 *addr)
3746 {
3747         nl80211_remove_iface(priv, if_nametoindex(ifname));
3748         return 0;
3749 }
3750
3751
3752 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3753                              const char *ifname, int vlan_id)
3754 {
3755         struct wpa_driver_nl80211_data *drv = priv;
3756         struct nl_msg *msg;
3757
3758         msg = nlmsg_alloc();
3759         if (!msg)
3760                 return -ENOMEM;
3761
3762         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3763                     0, NL80211_CMD_SET_STATION, 0);
3764
3765         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3766                     if_nametoindex(drv->ifname));
3767         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3768         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3769                     if_nametoindex(ifname));
3770
3771         return send_and_recv_msgs(drv, msg, NULL, NULL);
3772  nla_put_failure:
3773         return -ENOBUFS;
3774 }
3775
3776
3777 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3778 {
3779         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3780         struct sockaddr_ll lladdr;
3781         unsigned char buf[3000];
3782         int len;
3783         socklen_t fromlen = sizeof(lladdr);
3784
3785         len = recvfrom(sock, buf, sizeof(buf), 0,
3786                        (struct sockaddr *)&lladdr, &fromlen);
3787         if (len < 0) {
3788                 perror("recv");
3789                 return;
3790         }
3791
3792         if (have_ifidx(drv, lladdr.sll_ifindex)) {
3793                 void *ctx;
3794                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
3795                 if (!ctx)
3796                         return;
3797                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
3798         }
3799 }
3800
3801
3802 static int i802_get_inact_sec(void *priv, const u8 *addr)
3803 {
3804         struct hostap_sta_driver_data data;
3805         int ret;
3806
3807         data.inactive_msec = (unsigned long) -1;
3808         ret = i802_read_sta_data(priv, &data, addr);
3809         if (ret || data.inactive_msec == (unsigned long) -1)
3810                 return -1;
3811         return data.inactive_msec / 1000;
3812 }
3813
3814
3815 static int i802_sta_clear_stats(void *priv, const u8 *addr)
3816 {
3817 #if 0
3818         /* TODO */
3819 #endif
3820         return 0;
3821 }
3822
3823
3824 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
3825                            int reason)
3826 {
3827         struct wpa_driver_nl80211_data *drv = priv;
3828         struct ieee80211_mgmt mgmt;
3829
3830         memset(&mgmt, 0, sizeof(mgmt));
3831         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3832                                           WLAN_FC_STYPE_DEAUTH);
3833         memcpy(mgmt.da, addr, ETH_ALEN);
3834         memcpy(mgmt.sa, own_addr, ETH_ALEN);
3835         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
3836         mgmt.u.deauth.reason_code = host_to_le16(reason);
3837         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3838                                             IEEE80211_HDRLEN +
3839                                             sizeof(mgmt.u.deauth));
3840 }
3841
3842
3843 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
3844                              int reason)
3845 {
3846         struct wpa_driver_nl80211_data *drv = priv;
3847         struct ieee80211_mgmt mgmt;
3848
3849         memset(&mgmt, 0, sizeof(mgmt));
3850         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3851                                           WLAN_FC_STYPE_DISASSOC);
3852         memcpy(mgmt.da, addr, ETH_ALEN);
3853         memcpy(mgmt.sa, own_addr, ETH_ALEN);
3854         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
3855         mgmt.u.disassoc.reason_code = host_to_le16(reason);
3856         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3857                                             IEEE80211_HDRLEN +
3858                                             sizeof(mgmt.u.disassoc));
3859 }
3860
3861
3862 static void *i802_init(struct hostapd_data *hapd,
3863                        struct wpa_init_params *params)
3864 {
3865         struct wpa_driver_nl80211_data *drv;
3866         size_t i;
3867
3868         drv = wpa_driver_nl80211_init(hapd, params->ifname);
3869         if (drv == NULL)
3870                 return NULL;
3871
3872         drv->bss.ifindex = drv->ifindex;
3873
3874         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
3875         drv->if_indices = drv->default_if_indices;
3876         for (i = 0; i < params->num_bridge; i++) {
3877                 if (params->bridge[i])
3878                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
3879         }
3880
3881         /* start listening for EAPOL on the default AP interface */
3882         add_ifidx(drv, drv->ifindex);
3883
3884         if (params->bssid) {
3885                 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
3886                         goto failed;
3887
3888                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
3889                         goto failed;
3890         }
3891
3892         if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
3893                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
3894                            "into AP mode", drv->ifname);
3895                 goto failed;
3896         }
3897
3898         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3899                 goto failed;
3900
3901         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
3902         if (drv->eapol_sock < 0) {
3903                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
3904                 goto failed;
3905         }
3906
3907         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
3908         {
3909                 printf("Could not register read socket for eapol\n");
3910                 goto failed;
3911         }
3912
3913         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
3914                 goto failed;
3915
3916         return drv;
3917
3918 failed:
3919         nl80211_remove_monitor_interface(drv);
3920         if (drv->ioctl_sock >= 0)
3921                 close(drv->ioctl_sock);
3922
3923         genl_family_put(drv->nl80211);
3924         nl_cache_free(drv->nl_cache);
3925         nl_handle_destroy(drv->nl_handle);
3926         nl_cb_put(drv->nl_cb);
3927
3928         os_free(drv);
3929         return NULL;
3930 }
3931
3932
3933 static void i802_deinit(void *priv)
3934 {
3935         wpa_driver_nl80211_deinit(priv);
3936 }
3937
3938 #endif /* HOSTAPD */
3939
3940
3941 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
3942         .name = "nl80211",
3943         .desc = "Linux nl80211/cfg80211",
3944 #ifndef HOSTAPD
3945         .get_bssid = wpa_driver_nl80211_get_bssid,
3946         .get_ssid = wpa_driver_nl80211_get_ssid,
3947         .set_key = wpa_driver_nl80211_set_key,
3948 #endif /* HOSTAPD */
3949         .scan2 = wpa_driver_nl80211_scan,
3950         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
3951 #ifndef HOSTAPD
3952         .deauthenticate = wpa_driver_nl80211_deauthenticate,
3953         .disassociate = wpa_driver_nl80211_disassociate,
3954         .authenticate = wpa_driver_nl80211_authenticate,
3955         .associate = wpa_driver_nl80211_associate,
3956         .init = wpa_driver_nl80211_init,
3957         .deinit = wpa_driver_nl80211_deinit,
3958         .get_capa = wpa_driver_nl80211_get_capa,
3959         .set_operstate = wpa_driver_nl80211_set_operstate,
3960 #endif /* HOSTAPD */
3961         .set_country = wpa_driver_nl80211_set_country,
3962         .set_mode = wpa_driver_nl80211_set_mode,
3963 #ifdef CONFIG_AP
3964         .set_beacon = wpa_driver_nl80211_set_beacon,
3965 #endif /* CONFIG_AP */
3966 #if defined(CONFIG_AP) || defined(HOSTAPD)
3967         .send_mlme = wpa_driver_nl80211_send_mlme,
3968         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
3969         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
3970         .sta_add = wpa_driver_nl80211_sta_add,
3971         .sta_remove = wpa_driver_nl80211_sta_remove,
3972 #endif /* CONFIG_AP || HOSTAPD */
3973 #ifdef HOSTAPD
3974         .hapd_init = i802_init,
3975         .hapd_deinit = i802_deinit,
3976         .hapd_set_key = i802_set_key,
3977         .get_seqnum = i802_get_seqnum,
3978         .flush = i802_flush,
3979         .read_sta_data = i802_read_sta_data,
3980         .hapd_send_eapol = i802_send_eapol,
3981         .sta_set_flags = i802_sta_set_flags,
3982         .sta_deauth = i802_sta_deauth,
3983         .sta_disassoc = i802_sta_disassoc,
3984         .get_inact_sec = i802_get_inact_sec,
3985         .sta_clear_stats = i802_sta_clear_stats,
3986         .set_freq = i802_set_freq,
3987         .set_rts = i802_set_rts,
3988         .set_frag = i802_set_frag,
3989         .set_retry = i802_set_retry,
3990         .set_rate_sets = i802_set_rate_sets,
3991         .hapd_set_beacon = i802_set_beacon,
3992         .set_cts_protect = i802_set_cts_protect,
3993         .set_preamble = i802_set_preamble,
3994         .set_short_slot_time = i802_set_short_slot_time,
3995         .set_tx_queue_params = i802_set_tx_queue_params,
3996         .bss_add = i802_bss_add,
3997         .bss_remove = i802_bss_remove,
3998         .if_add = i802_if_add,
3999         .if_update = i802_if_update,
4000         .if_remove = i802_if_remove,
4001         .set_sta_vlan = i802_set_sta_vlan,
4002 #endif /* HOSTAPD */
4003 };