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         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1757                                        reason_code);
1758 }
1759
1760
1761 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1762                                            int reason_code)
1763 {
1764         struct wpa_driver_nl80211_data *drv = priv;
1765         wpa_printf(MSG_DEBUG, "%s", __func__);
1766         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1767                                        reason_code);
1768 }
1769
1770
1771 static int wpa_driver_nl80211_authenticate(
1772         void *priv, struct wpa_driver_auth_params *params)
1773 {
1774         struct wpa_driver_nl80211_data *drv = priv;
1775         int ret = -1, i;
1776         struct nl_msg *msg;
1777         enum nl80211_auth_type type;
1778
1779         drv->associated = 0;
1780
1781         msg = nlmsg_alloc();
1782         if (!msg)
1783                 return -1;
1784
1785         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1786                    drv->ifindex);
1787
1788         for (i = 0; i < 4; i++) {
1789                 if (!params->wep_key[i])
1790                         continue;
1791                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1792                                            i == params->wep_tx_keyidx, NULL, 0,
1793                                            params->wep_key[i],
1794                                            params->wep_key_len[i]);
1795         }
1796
1797         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1798                     NL80211_CMD_AUTHENTICATE, 0);
1799
1800         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1801         if (params->bssid) {
1802                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1803                            MAC2STR(params->bssid));
1804                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1805         }
1806         if (params->freq) {
1807                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1808                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1809         }
1810         if (params->ssid) {
1811                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1812                                   params->ssid, params->ssid_len);
1813                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1814                         params->ssid);
1815         }
1816         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1817         if (params->ie)
1818                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1819         /*
1820          * TODO: if multiple auth_alg options enabled, try them one by one if
1821          * the AP rejects authentication due to unknown auth alg
1822          */
1823         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1824                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1825         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1826                 type = NL80211_AUTHTYPE_SHARED_KEY;
1827         else if (params->auth_alg & AUTH_ALG_LEAP)
1828                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1829         else if (params->auth_alg & AUTH_ALG_FT)
1830                 type = NL80211_AUTHTYPE_FT;
1831         else
1832                 goto nla_put_failure;
1833         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1834         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1835
1836         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1837         msg = NULL;
1838         if (ret) {
1839                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1840                            "(%s)", ret, strerror(-ret));
1841                 goto nla_put_failure;
1842         }
1843         ret = 0;
1844         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1845                    "successfully");
1846
1847 nla_put_failure:
1848         nlmsg_free(msg);
1849         return ret;
1850 }
1851
1852 #endif /* HOSTAPD */
1853
1854
1855 #if defined(CONFIG_AP) || defined(HOSTAPD)
1856
1857 struct phy_info_arg {
1858         u16 *num_modes;
1859         struct hostapd_hw_modes *modes;
1860 };
1861
1862 static int phy_info_handler(struct nl_msg *msg, void *arg)
1863 {
1864         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1865         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1866         struct phy_info_arg *phy_info = arg;
1867
1868         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1869
1870         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1871         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1872                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1873                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1874                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1875                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1876                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1877                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1878         };
1879
1880         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1881         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1882                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1883                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1884         };
1885
1886         struct nlattr *nl_band;
1887         struct nlattr *nl_freq;
1888         struct nlattr *nl_rate;
1889         int rem_band, rem_freq, rem_rate;
1890         struct hostapd_hw_modes *mode;
1891         int idx, mode_is_set;
1892
1893         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1894                   genlmsg_attrlen(gnlh, 0), NULL);
1895
1896         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1897                 return NL_SKIP;
1898
1899         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1900                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1901                 if (!mode)
1902                         return NL_SKIP;
1903                 phy_info->modes = mode;
1904
1905                 mode_is_set = 0;
1906
1907                 mode = &phy_info->modes[*(phy_info->num_modes)];
1908                 memset(mode, 0, sizeof(*mode));
1909                 *(phy_info->num_modes) += 1;
1910
1911                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1912                           nla_len(nl_band), NULL);
1913
1914                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1915                         mode->ht_capab = nla_get_u16(
1916                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1917                 }
1918
1919                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1920                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1921                                   nla_len(nl_freq), freq_policy);
1922                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1923                                 continue;
1924                         mode->num_channels++;
1925                 }
1926
1927                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1928                 if (!mode->channels)
1929                         return NL_SKIP;
1930
1931                 idx = 0;
1932
1933                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1934                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1935                                   nla_len(nl_freq), freq_policy);
1936                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1937                                 continue;
1938
1939                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1940                         mode->channels[idx].flag = 0;
1941
1942                         if (!mode_is_set) {
1943                                 /* crude heuristic */
1944                                 if (mode->channels[idx].freq < 4000)
1945                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1946                                 else
1947                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1948                                 mode_is_set = 1;
1949                         }
1950
1951                         /* crude heuristic */
1952                         if (mode->channels[idx].freq < 4000)
1953                                 if (mode->channels[idx].freq == 2484)
1954                                         mode->channels[idx].chan = 14;
1955                                 else
1956                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1957                         else
1958                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1959
1960                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1961                                 mode->channels[idx].flag |=
1962                                         HOSTAPD_CHAN_DISABLED;
1963                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1964                                 mode->channels[idx].flag |=
1965                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1966                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1967                                 mode->channels[idx].flag |=
1968                                         HOSTAPD_CHAN_NO_IBSS;
1969                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1970                                 mode->channels[idx].flag |=
1971                                         HOSTAPD_CHAN_RADAR;
1972
1973                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1974                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1975                                 mode->channels[idx].max_tx_power =
1976                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1977
1978                         idx++;
1979                 }
1980
1981                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1982                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1983                                   nla_len(nl_rate), rate_policy);
1984                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1985                                 continue;
1986                         mode->num_rates++;
1987                 }
1988
1989                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1990                 if (!mode->rates)
1991                         return NL_SKIP;
1992
1993                 idx = 0;
1994
1995                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1996                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1997                                   nla_len(nl_rate), rate_policy);
1998                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1999                                 continue;
2000                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2001
2002                         /* crude heuristic */
2003                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2004                             mode->rates[idx].rate > 200)
2005                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2006
2007                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2008                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
2009
2010                         idx++;
2011                 }
2012         }
2013
2014         return NL_SKIP;
2015 }
2016
2017 static struct hostapd_hw_modes *
2018 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2019 {
2020         u16 m;
2021         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2022         int i, mode11g_idx = -1;
2023
2024         /* If only 802.11g mode is included, use it to construct matching
2025          * 802.11b mode data. */
2026
2027         for (m = 0; m < *num_modes; m++) {
2028                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2029                         return modes; /* 802.11b already included */
2030                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2031                         mode11g_idx = m;
2032         }
2033
2034         if (mode11g_idx < 0)
2035                 return modes; /* 2.4 GHz band not supported at all */
2036
2037         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2038         if (nmodes == NULL)
2039                 return modes; /* Could not add 802.11b mode */
2040
2041         mode = &nmodes[*num_modes];
2042         os_memset(mode, 0, sizeof(*mode));
2043         (*num_modes)++;
2044         modes = nmodes;
2045
2046         mode->mode = HOSTAPD_MODE_IEEE80211B;
2047
2048         mode11g = &modes[mode11g_idx];
2049         mode->num_channels = mode11g->num_channels;
2050         mode->channels = os_malloc(mode11g->num_channels *
2051                                    sizeof(struct hostapd_channel_data));
2052         if (mode->channels == NULL) {
2053                 (*num_modes)--;
2054                 return modes; /* Could not add 802.11b mode */
2055         }
2056         os_memcpy(mode->channels, mode11g->channels,
2057                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2058
2059         mode->num_rates = 0;
2060         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2061         if (mode->rates == NULL) {
2062                 os_free(mode->channels);
2063                 (*num_modes)--;
2064                 return modes; /* Could not add 802.11b mode */
2065         }
2066
2067         for (i = 0; i < mode11g->num_rates; i++) {
2068                 if (mode11g->rates[i].rate > 110 ||
2069                     mode11g->rates[i].flags &
2070                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2071                         continue;
2072                 mode->rates[mode->num_rates] = mode11g->rates[i];
2073                 mode->num_rates++;
2074                 if (mode->num_rates == 4)
2075                         break;
2076         }
2077
2078         if (mode->num_rates == 0) {
2079                 os_free(mode->channels);
2080                 os_free(mode->rates);
2081                 (*num_modes)--;
2082                 return modes; /* No 802.11b rates */
2083         }
2084
2085         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2086                    "information");
2087
2088         return modes;
2089 }
2090
2091
2092 static struct hostapd_hw_modes *
2093 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2094 {
2095         struct wpa_driver_nl80211_data *drv = priv;
2096         struct nl_msg *msg;
2097         struct phy_info_arg result = {
2098                 .num_modes = num_modes,
2099                 .modes = NULL,
2100         };
2101
2102         *num_modes = 0;
2103         *flags = 0;
2104
2105         msg = nlmsg_alloc();
2106         if (!msg)
2107                 return NULL;
2108
2109         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2110                     0, NL80211_CMD_GET_WIPHY, 0);
2111
2112         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2113
2114         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2115                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2116  nla_put_failure:
2117         return NULL;
2118 }
2119
2120
2121 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2122                                          const void *data, size_t len,
2123                                          int encrypt)
2124 {
2125         __u8 rtap_hdr[] = {
2126                 0x00, 0x00, /* radiotap version */
2127                 0x0e, 0x00, /* radiotap length */
2128                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2129                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2130                 0x00,       /* padding */
2131                 0x00, 0x00, /* RX and TX flags to indicate that */
2132                 0x00, 0x00, /* this is the injected frame directly */
2133         };
2134         struct iovec iov[2] = {
2135                 {
2136                         .iov_base = &rtap_hdr,
2137                         .iov_len = sizeof(rtap_hdr),
2138                 },
2139                 {
2140                         .iov_base = (void *) data,
2141                         .iov_len = len,
2142                 }
2143         };
2144         struct msghdr msg = {
2145                 .msg_name = NULL,
2146                 .msg_namelen = 0,
2147                 .msg_iov = iov,
2148                 .msg_iovlen = 2,
2149                 .msg_control = NULL,
2150                 .msg_controllen = 0,
2151                 .msg_flags = 0,
2152         };
2153
2154         if (encrypt)
2155                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2156
2157         return sendmsg(drv->monitor_sock, &msg, 0);
2158 }
2159
2160
2161 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2162                                         size_t data_len)
2163 {
2164         struct wpa_driver_nl80211_data *drv = priv;
2165         struct ieee80211_mgmt *mgmt;
2166         int do_not_encrypt = 0;
2167         u16 fc;
2168
2169         mgmt = (struct ieee80211_mgmt *) data;
2170         fc = le_to_host16(mgmt->frame_control);
2171
2172         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2173             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2174                 /*
2175                  * Only one of the authentication frame types is encrypted.
2176                  * In order for static WEP encryption to work properly (i.e.,
2177                  * to not encrypt the frame), we need to tell mac80211 about
2178                  * the frames that must not be encrypted.
2179                  */
2180                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2181                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2182                 if (auth_alg == WLAN_AUTH_OPEN ||
2183                     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
2184                         do_not_encrypt = 1;
2185         }
2186
2187         return wpa_driver_nl80211_send_frame(drv, data, data_len,
2188                                              !do_not_encrypt);
2189 }
2190
2191
2192 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2193                                                const u8 *head, size_t head_len,
2194                                                const u8 *tail, size_t tail_len,
2195                                                int dtim_period)
2196 {
2197         struct wpa_driver_nl80211_data *drv = priv;
2198         struct nl_msg *msg;
2199         u8 cmd = NL80211_CMD_NEW_BEACON;
2200         int ret;
2201         int beacon_set;
2202 #ifdef HOSTAPD
2203         struct i802_bss *bss;
2204
2205         bss = get_bss(drv, ifindex);
2206         if (bss == NULL)
2207                 return -ENOENT;
2208         beacon_set = bss->beacon_set;
2209 #else /* HOSTAPD */
2210         beacon_set = drv->beacon_set;
2211 #endif /* HOSTAPD */
2212
2213         msg = nlmsg_alloc();
2214         if (!msg)
2215                 return -ENOMEM;
2216
2217         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2218                    beacon_set);
2219         if (beacon_set)
2220                 cmd = NL80211_CMD_SET_BEACON;
2221
2222         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2223                     0, cmd, 0);
2224         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2225         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2226         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2227         if (!drv->beacon_int)
2228                 drv->beacon_int = 100;
2229         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2230         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2231
2232         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2233         if (ret) {
2234                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2235                            ret, strerror(-ret));
2236         } else {
2237 #ifdef HOSTAPD
2238                 bss->beacon_set = 1;
2239 #else /* HOSTAPD */
2240                 drv->beacon_set = 1;
2241 #endif /* HOSTAPD */
2242         }
2243         return ret;
2244  nla_put_failure:
2245         return -ENOBUFS;
2246 }
2247
2248
2249 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2250 {
2251         struct wpa_driver_nl80211_data *drv = priv;
2252         struct nl_msg *msg;
2253
2254         drv->beacon_int = value;
2255
2256 #ifdef HOSTAPD
2257         if (!drv->bss.beacon_set)
2258                 return 0;
2259 #else /* HOSTAPD */
2260         if (!drv->beacon_set)
2261                 return 0;
2262 #endif /* HOSTAPD */
2263
2264         msg = nlmsg_alloc();
2265         if (!msg)
2266                 return -ENOMEM;
2267
2268         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2269         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2270                     0, NL80211_CMD_SET_BEACON, 0);
2271         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2272
2273         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2274
2275         return send_and_recv_msgs(drv, msg, NULL, NULL);
2276  nla_put_failure:
2277         return -ENOBUFS;
2278 }
2279
2280
2281 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2282                                        int freq, int ht_enabled,
2283                                        int sec_channel_offset)
2284 {
2285         struct nl_msg *msg;
2286         int ret;
2287
2288         msg = nlmsg_alloc();
2289         if (!msg)
2290                 return -1;
2291
2292         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2293                     NL80211_CMD_SET_WIPHY, 0);
2294
2295         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2296         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2297         if (ht_enabled) {
2298                 switch (sec_channel_offset) {
2299                 case -1:
2300                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2301                                     NL80211_CHAN_HT40MINUS);
2302                         break;
2303                 case 1:
2304                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2305                                     NL80211_CHAN_HT40PLUS);
2306                         break;
2307                 default:
2308                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2309                                     NL80211_CHAN_HT20);
2310                         break;
2311                 }
2312         }
2313
2314         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2315         if (ret == 0)
2316                 return 0;
2317         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2318                    "%d (%s)", freq, ret, strerror(-ret));
2319 nla_put_failure:
2320         return -1;
2321 }
2322
2323
2324 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2325                                       struct hostapd_sta_add_params *params)
2326 {
2327         struct wpa_driver_nl80211_data *drv = priv;
2328         struct nl_msg *msg;
2329         int ret = -ENOBUFS;
2330
2331         msg = nlmsg_alloc();
2332         if (!msg)
2333                 return -ENOMEM;
2334
2335         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2336                     0, NL80211_CMD_NEW_STATION, 0);
2337
2338         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2339         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2340         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2341         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2342                 params->supp_rates);
2343         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2344                     params->listen_interval);
2345
2346 #ifdef CONFIG_IEEE80211N
2347         if (params->ht_capabilities) {
2348                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2349                         params->ht_capabilities->length,
2350                         &params->ht_capabilities->data);
2351         }
2352 #endif /* CONFIG_IEEE80211N */
2353
2354         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2355         if (ret)
2356                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2357                            "result: %d (%s)", ret, strerror(-ret));
2358         if (ret == -EEXIST)
2359                 ret = 0;
2360  nla_put_failure:
2361         return ret;
2362 }
2363
2364
2365 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2366 {
2367         struct wpa_driver_nl80211_data *drv = priv;
2368         struct nl_msg *msg;
2369         int ret;
2370
2371         msg = nlmsg_alloc();
2372         if (!msg)
2373                 return -ENOMEM;
2374
2375         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2376                     0, NL80211_CMD_DEL_STATION, 0);
2377
2378         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2379                     if_nametoindex(drv->ifname));
2380         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2381
2382         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2383         if (ret == -ENOENT)
2384                 return 0;
2385         return ret;
2386  nla_put_failure:
2387         return -ENOBUFS;
2388 }
2389
2390 #endif /* CONFIG_AP || HOSTAPD */
2391
2392
2393 #ifdef CONFIG_AP
2394
2395 static int wpa_driver_nl80211_set_beacon(void *priv,
2396                                          const u8 *head, size_t head_len,
2397                                          const u8 *tail, size_t tail_len,
2398                                          int dtim_period)
2399 {
2400         struct wpa_driver_nl80211_data *drv = priv;
2401         return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2402                                                    head, head_len,
2403                                                    tail, tail_len,
2404                                                    dtim_period);
2405 }
2406
2407 #endif /* CONFIG_AP */
2408
2409 #if defined(CONFIG_AP) || defined(HOSTAPD)
2410
2411 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2412                                  int ifidx)
2413 {
2414         struct nl_msg *msg;
2415
2416 #ifdef HOSTAPD
2417         /* stop listening for EAPOL on this interface */
2418         del_ifidx(drv, ifidx);
2419 #endif /* HOSTAPD */
2420
2421         msg = nlmsg_alloc();
2422         if (!msg)
2423                 goto nla_put_failure;
2424
2425         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2426                     0, NL80211_CMD_DEL_INTERFACE, 0);
2427         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2428
2429         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2430                 return;
2431  nla_put_failure:
2432         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2433                    ifidx);
2434 }
2435
2436
2437 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2438                                 const char *ifname, enum nl80211_iftype iftype,
2439                                 const u8 *addr)
2440 {
2441         struct nl_msg *msg, *flags = NULL;
2442         int ifidx;
2443         int ret = -ENOBUFS;
2444
2445         msg = nlmsg_alloc();
2446         if (!msg)
2447                 return -1;
2448
2449         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2450                     0, NL80211_CMD_NEW_INTERFACE, 0);
2451         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2452         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2453         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2454
2455         if (iftype == NL80211_IFTYPE_MONITOR) {
2456                 int err;
2457
2458                 flags = nlmsg_alloc();
2459                 if (!flags)
2460                         goto nla_put_failure;
2461
2462                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2463
2464                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2465
2466                 nlmsg_free(flags);
2467
2468                 if (err)
2469                         goto nla_put_failure;
2470         }
2471
2472         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2473         if (ret) {
2474  nla_put_failure:
2475                 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2476                            ifname);
2477                 return ret;
2478         }
2479
2480         ifidx = if_nametoindex(ifname);
2481
2482         if (ifidx <= 0)
2483                 return -1;
2484
2485 #ifdef HOSTAPD
2486         /* start listening for EAPOL on this interface */
2487         add_ifidx(drv, ifidx);
2488
2489         if (addr && iftype == NL80211_IFTYPE_AP &&
2490             set_ifhwaddr(drv, ifname, addr)) {
2491                 nl80211_remove_iface(drv, ifidx);
2492                 return -1;
2493         }
2494 #endif /* HOSTAPD */
2495
2496         return ifidx;
2497 }
2498
2499 #endif /* CONFIG_AP || HOSTAPD */
2500
2501 #ifdef CONFIG_AP
2502
2503 void ap_tx_status(void *ctx, const u8 *addr,
2504                   const u8 *buf, size_t len, int ack);
2505 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2506 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2507                 struct hostapd_frame_info *fi);
2508 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2509
2510 #endif /* CONFIG_AP */
2511
2512 #if defined(CONFIG_AP) || defined(HOSTAPD)
2513
2514 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2515 {
2516         struct ieee80211_hdr *hdr;
2517         u16 fc, type, stype;
2518
2519         hdr = (struct ieee80211_hdr *) buf;
2520         fc = le_to_host16(hdr->frame_control);
2521
2522         type = WLAN_FC_GET_TYPE(fc);
2523         stype = WLAN_FC_GET_STYPE(fc);
2524
2525         switch (type) {
2526         case WLAN_FC_TYPE_MGMT:
2527                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2528                            ok ? "ACK" : "fail");
2529 #ifdef HOSTAPD
2530                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2531 #else /* HOSTAPD */
2532                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2533 #endif /* HOSTAPD */
2534                 break;
2535         case WLAN_FC_TYPE_CTRL:
2536                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2537                            ok ? "ACK" : "fail");
2538                 break;
2539         case WLAN_FC_TYPE_DATA:
2540 #ifdef HOSTAPD
2541                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2542 #else /* HOSTAPD */
2543                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2544 #endif /* HOSTAPD */
2545                 break;
2546         default:
2547                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2548                            type);
2549                 break;
2550         }
2551 }
2552
2553
2554 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2555                              struct ieee80211_hdr *hdr, size_t len)
2556 {
2557 #ifdef HOSTAPD
2558         hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2559 #else /* HOSTAPD */
2560         ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2561 #endif /* HOSTAPD */
2562 }
2563
2564
2565 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2566                          u8 *buf, size_t len,
2567                          struct hostapd_frame_info *hfi)
2568 {
2569         struct ieee80211_hdr *hdr;
2570         u16 fc, stype;
2571
2572         hdr = (struct ieee80211_hdr *) buf;
2573         fc = le_to_host16(hdr->frame_control);
2574         stype = WLAN_FC_GET_STYPE(fc);
2575
2576         switch (WLAN_FC_GET_TYPE(fc)) {
2577         case WLAN_FC_TYPE_MGMT:
2578                 if (stype != WLAN_FC_STYPE_BEACON &&
2579                     stype != WLAN_FC_STYPE_PROBE_REQ)
2580                         wpa_printf(MSG_MSGDUMP, "MGMT");
2581 #ifdef HOSTAPD
2582                 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2583 #else /* HOSTAPD */
2584                 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2585 #endif /* HOSTAPD */
2586                 break;
2587         case WLAN_FC_TYPE_CTRL:
2588                 /* can only get here with PS-Poll frames */
2589                 wpa_printf(MSG_DEBUG, "CTRL");
2590                 from_unknown_sta(drv, hdr, len);
2591                 break;
2592         case WLAN_FC_TYPE_DATA:
2593                 from_unknown_sta(drv, hdr, len);
2594                 break;
2595         }
2596 }
2597
2598
2599 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2600 {
2601         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2602         int len;
2603         unsigned char buf[3000];
2604         struct ieee80211_radiotap_iterator iter;
2605         int ret;
2606         struct hostapd_frame_info hfi;
2607         int injected = 0, failed = 0, rxflags = 0;
2608
2609         len = recv(sock, buf, sizeof(buf), 0);
2610         if (len < 0) {
2611                 perror("recv");
2612                 return;
2613         }
2614
2615         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2616                 printf("received invalid radiotap frame\n");
2617                 return;
2618         }
2619
2620         memset(&hfi, 0, sizeof(hfi));
2621
2622         while (1) {
2623                 ret = ieee80211_radiotap_iterator_next(&iter);
2624                 if (ret == -ENOENT)
2625                         break;
2626                 if (ret) {
2627                         printf("received invalid radiotap frame (%d)\n", ret);
2628                         return;
2629                 }
2630                 switch (iter.this_arg_index) {
2631                 case IEEE80211_RADIOTAP_FLAGS:
2632                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2633                                 len -= 4;
2634                         break;
2635                 case IEEE80211_RADIOTAP_RX_FLAGS:
2636                         rxflags = 1;
2637                         break;
2638                 case IEEE80211_RADIOTAP_TX_FLAGS:
2639                         injected = 1;
2640                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2641                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2642                         break;
2643                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2644                         break;
2645                 case IEEE80211_RADIOTAP_CHANNEL:
2646                         /* TODO convert from freq/flags to channel number
2647                         hfi.channel = XXX;
2648                         hfi.phytype = XXX;
2649                          */
2650                         break;
2651                 case IEEE80211_RADIOTAP_RATE:
2652                         hfi.datarate = *iter.this_arg * 5;
2653                         break;
2654                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2655                         hfi.ssi_signal = *iter.this_arg;
2656                         break;
2657                 }
2658         }
2659
2660         if (rxflags && injected)
2661                 return;
2662
2663         if (!injected)
2664                 handle_frame(drv, buf + iter.max_length,
2665                              len - iter.max_length, &hfi);
2666         else
2667                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2668                                    len - iter.max_length, !failed);
2669 }
2670
2671
2672 /*
2673  * we post-process the filter code later and rewrite
2674  * this to the offset to the last instruction
2675  */
2676 #define PASS    0xFF
2677 #define FAIL    0xFE
2678
2679 static struct sock_filter msock_filter_insns[] = {
2680         /*
2681          * do a little-endian load of the radiotap length field
2682          */
2683         /* load lower byte into A */
2684         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2685         /* put it into X (== index register) */
2686         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2687         /* load upper byte into A */
2688         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2689         /* left-shift it by 8 */
2690         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2691         /* or with X */
2692         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2693         /* put result into X */
2694         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2695
2696         /*
2697          * Allow management frames through, this also gives us those
2698          * management frames that we sent ourselves with status
2699          */
2700         /* load the lower byte of the IEEE 802.11 frame control field */
2701         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2702         /* mask off frame type and version */
2703         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2704         /* accept frame if it's both 0, fall through otherwise */
2705         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2706
2707         /*
2708          * TODO: add a bit to radiotap RX flags that indicates
2709          * that the sending station is not associated, then
2710          * add a filter here that filters on our DA and that flag
2711          * to allow us to deauth frames to that bad station.
2712          *
2713          * Not a regression -- we didn't do it before either.
2714          */
2715
2716 #if 0
2717         /*
2718          * drop non-data frames, WDS frames
2719          */
2720         /* load the lower byte of the frame control field */
2721         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2722         /* mask off QoS bit */
2723         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2724         /* drop non-data frames */
2725         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2726         /* load the upper byte of the frame control field */
2727         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2728         /* mask off toDS/fromDS */
2729         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2730         /* drop WDS frames */
2731         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2732 #endif
2733
2734         /*
2735          * add header length to index
2736          */
2737         /* load the lower byte of the frame control field */
2738         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2739         /* mask off QoS bit */
2740         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2741         /* right shift it by 6 to give 0 or 2 */
2742         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2743         /* add data frame header length */
2744         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2745         /* add index, was start of 802.11 header */
2746         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2747         /* move to index, now start of LL header */
2748         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2749
2750         /*
2751          * Accept empty data frames, we use those for
2752          * polling activity.
2753          */
2754         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2755         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2756
2757         /*
2758          * Accept EAPOL frames
2759          */
2760         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2761         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2762         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2763         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2764
2765         /* keep these last two statements or change the code below */
2766         /* return 0 == "DROP" */
2767         BPF_STMT(BPF_RET | BPF_K, 0),
2768         /* return ~0 == "keep all" */
2769         BPF_STMT(BPF_RET | BPF_K, ~0),
2770 };
2771
2772 static struct sock_fprog msock_filter = {
2773         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2774         .filter = msock_filter_insns,
2775 };
2776
2777
2778 static int add_monitor_filter(int s)
2779 {
2780         int idx;
2781
2782         /* rewrite all PASS/FAIL jump offsets */
2783         for (idx = 0; idx < msock_filter.len; idx++) {
2784                 struct sock_filter *insn = &msock_filter_insns[idx];
2785
2786                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2787                         if (insn->code == (BPF_JMP|BPF_JA)) {
2788                                 if (insn->k == PASS)
2789                                         insn->k = msock_filter.len - idx - 2;
2790                                 else if (insn->k == FAIL)
2791                                         insn->k = msock_filter.len - idx - 3;
2792                         }
2793
2794                         if (insn->jt == PASS)
2795                                 insn->jt = msock_filter.len - idx - 2;
2796                         else if (insn->jt == FAIL)
2797                                 insn->jt = msock_filter.len - idx - 3;
2798
2799                         if (insn->jf == PASS)
2800                                 insn->jf = msock_filter.len - idx - 2;
2801                         else if (insn->jf == FAIL)
2802                                 insn->jf = msock_filter.len - idx - 3;
2803                 }
2804         }
2805
2806         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2807                        &msock_filter, sizeof(msock_filter))) {
2808                 perror("SO_ATTACH_FILTER");
2809                 return -1;
2810         }
2811
2812         return 0;
2813 }
2814
2815
2816 static void nl80211_remove_monitor_interface(
2817         struct wpa_driver_nl80211_data *drv)
2818 {
2819         if (drv->monitor_ifidx >= 0) {
2820                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2821                 drv->monitor_ifidx = -1;
2822         }
2823 }
2824
2825
2826 static int
2827 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2828 {
2829         char buf[IFNAMSIZ];
2830         struct sockaddr_ll ll;
2831         int optval;
2832         socklen_t optlen;
2833
2834         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2835         buf[IFNAMSIZ - 1] = '\0';
2836
2837         drv->monitor_ifidx =
2838                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2839
2840         if (drv->monitor_ifidx < 0)
2841                 return -1;
2842
2843         if (hostapd_set_iface_flags(drv, buf, 1))
2844                 goto error;
2845
2846         memset(&ll, 0, sizeof(ll));
2847         ll.sll_family = AF_PACKET;
2848         ll.sll_ifindex = drv->monitor_ifidx;
2849         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2850         if (drv->monitor_sock < 0) {
2851                 perror("socket[PF_PACKET,SOCK_RAW]");
2852                 goto error;
2853         }
2854
2855         if (add_monitor_filter(drv->monitor_sock)) {
2856                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2857                            "interface; do filtering in user space");
2858                 /* This works, but will cost in performance. */
2859         }
2860
2861         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2862                 perror("monitor socket bind");
2863                 goto error;
2864         }
2865
2866         optlen = sizeof(optval);
2867         optval = 20;
2868         if (setsockopt
2869             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2870                 perror("Failed to set socket priority");
2871                 goto error;
2872         }
2873
2874         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2875                                      drv, NULL)) {
2876                 printf("Could not register monitor read socket\n");
2877                 goto error;
2878         }
2879
2880         return 0;
2881  error:
2882         nl80211_remove_monitor_interface(drv);
2883         return -1;
2884 }
2885
2886 #endif /* CONFIG_AP || HOSTAPD */
2887
2888 #ifdef CONFIG_AP
2889
2890 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2891                                  struct wpa_driver_associate_params *params)
2892 {
2893         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2894             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
2895                 nl80211_remove_monitor_interface(drv);
2896                 return -1;
2897         }
2898
2899         /* TODO: setup monitor interface (and add code somewhere to remove this
2900          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2901
2902         return 0;
2903 }
2904 #endif /* CONFIG_AP */
2905
2906
2907 #ifndef HOSTAPD
2908 static int wpa_driver_nl80211_associate(
2909         void *priv, struct wpa_driver_associate_params *params)
2910 {
2911         struct wpa_driver_nl80211_data *drv = priv;
2912         int ret = -1;
2913         struct nl_msg *msg;
2914
2915 #ifdef CONFIG_AP
2916         if (params->mode == 2)
2917                 return wpa_driver_nl80211_ap(drv, params);
2918 #endif /* CONFIG_AP */
2919
2920 #ifndef NO_WEXT
2921         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2922                                           params->drop_unencrypted);
2923 #endif /* NO_WEXT */
2924
2925         drv->associated = 0;
2926
2927         msg = nlmsg_alloc();
2928         if (!msg)
2929                 return -1;
2930
2931         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2932                    drv->ifindex);
2933         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2934                     NL80211_CMD_ASSOCIATE, 0);
2935
2936         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2937         if (params->bssid) {
2938                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2939                            MAC2STR(params->bssid));
2940                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2941         }
2942         if (params->freq) {
2943                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2944                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2945         }
2946         if (params->ssid) {
2947                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2948                                   params->ssid, params->ssid_len);
2949                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2950                         params->ssid);
2951                 if (params->ssid_len > sizeof(drv->ssid))
2952                         goto nla_put_failure;
2953                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2954                 drv->ssid_len = params->ssid_len;
2955         }
2956         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
2957         if (params->wpa_ie)
2958                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2959                         params->wpa_ie);
2960
2961         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2962         msg = NULL;
2963         if (ret) {
2964                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2965                            "(%s)", ret, strerror(-ret));
2966                 goto nla_put_failure;
2967         }
2968         ret = 0;
2969         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2970                    "successfully");
2971
2972 nla_put_failure:
2973         nlmsg_free(msg);
2974         return ret;
2975 }
2976 #endif /* HOSTAPD */
2977
2978
2979 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2980                             int ifindex, int mode)
2981 {
2982         struct nl_msg *msg;
2983         int ret = -ENOBUFS;
2984
2985         msg = nlmsg_alloc();
2986         if (!msg)
2987                 return -ENOMEM;
2988
2989         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2990                     0, NL80211_CMD_SET_INTERFACE, 0);
2991         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2992         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
2993
2994         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2995         if (!ret)
2996                 return 0;
2997 nla_put_failure:
2998         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
2999                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3000         return ret;
3001 }
3002
3003
3004 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3005 {
3006         struct wpa_driver_nl80211_data *drv = priv;
3007         int ret = -1;
3008         int nlmode;
3009
3010         switch (mode) {
3011         case 0:
3012                 nlmode = NL80211_IFTYPE_STATION;
3013                 break;
3014         case 1:
3015                 nlmode = NL80211_IFTYPE_ADHOC;
3016                 break;
3017         case 2:
3018                 nlmode = NL80211_IFTYPE_AP;
3019                 break;
3020         default:
3021                 return -1;
3022         }
3023
3024         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3025                 drv->nlmode = nlmode;
3026                 ret = 0;
3027                 goto done;
3028         }
3029
3030         if (nlmode == drv->nlmode) {
3031                 ret = 0;
3032                 goto done; /* Already in the requested mode */
3033         }
3034
3035         /* mac80211 doesn't allow mode changes while the device is up, so
3036          * take the device down, try to set the mode again, and bring the
3037          * device back up.
3038          */
3039         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3040                 /* Try to set the mode again while the interface is down */
3041                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3042                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3043                         ret = -1;
3044         }
3045
3046         if (!ret)
3047                 drv->nlmode = nlmode;
3048
3049 done:
3050 #if defined(CONFIG_AP) || defined(HOSTAPD)
3051         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3052                 /* Setup additional AP mode functionality if needed */
3053                 if (drv->monitor_ifidx < 0 &&
3054                     nl80211_create_monitor_interface(drv))
3055                         return -1;
3056         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3057                 /* Remove additional AP mode functionality */
3058                 nl80211_remove_monitor_interface(drv);
3059         }
3060 #endif /* CONFIG_AP || HOSTAPD */
3061
3062         return ret;
3063 }
3064
3065
3066 #ifndef HOSTAPD
3067
3068 static int wpa_driver_nl80211_get_capa(void *priv,
3069                                        struct wpa_driver_capa *capa)
3070 {
3071         struct wpa_driver_nl80211_data *drv = priv;
3072         if (!drv->has_capability)
3073                 return -1;
3074         os_memcpy(capa, &drv->capa, sizeof(*capa));
3075         return 0;
3076 }
3077
3078
3079 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3080 {
3081         struct wpa_driver_nl80211_data *drv = priv;
3082
3083         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3084                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3085         drv->operstate = state;
3086         return wpa_driver_nl80211_send_oper_ifla(
3087                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3088 }
3089
3090 #endif /* HOSTAPD */
3091
3092
3093 #ifdef HOSTAPD
3094
3095 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3096
3097
3098 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3099                                  int ifindex)
3100 {
3101         struct i802_bss *bss = &drv->bss;
3102         while (bss) {
3103                 if (ifindex == bss->ifindex)
3104                         return bss;
3105                 bss = bss->next;
3106         }
3107         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3108         return NULL;
3109 }
3110
3111
3112 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3113 {
3114         int i;
3115         int *old;
3116
3117         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3118                    ifidx);
3119         for (i = 0; i < drv->num_if_indices; i++) {
3120                 if (drv->if_indices[i] == 0) {
3121                         drv->if_indices[i] = ifidx;
3122                         return;
3123                 }
3124         }
3125
3126         if (drv->if_indices != drv->default_if_indices)
3127                 old = drv->if_indices;
3128         else
3129                 old = NULL;
3130
3131         drv->if_indices = realloc(old,
3132                                   sizeof(int) * (drv->num_if_indices + 1));
3133         if (!drv->if_indices) {
3134                 if (!old)
3135                         drv->if_indices = drv->default_if_indices;
3136                 else
3137                         drv->if_indices = old;
3138                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3139                            "interfaces");
3140                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3141                 return;
3142         }
3143         drv->if_indices[drv->num_if_indices] = ifidx;
3144         drv->num_if_indices++;
3145 }
3146
3147
3148 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3149 {
3150         int i;
3151
3152         for (i = 0; i < drv->num_if_indices; i++) {
3153                 if (drv->if_indices[i] == ifidx) {
3154                         drv->if_indices[i] = 0;
3155                         break;
3156                 }
3157         }
3158 }
3159
3160
3161 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3162 {
3163         int i;
3164
3165         for (i = 0; i < drv->num_if_indices; i++)
3166                 if (drv->if_indices[i] == ifidx)
3167                         return 1;
3168
3169         return 0;
3170 }
3171
3172
3173 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3174                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3175                         size_t seq_len, const u8 *key, size_t key_len)
3176 {
3177         struct wpa_driver_nl80211_data *drv = priv;
3178         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3179                            set_tx, seq, seq_len, key, key_len);
3180 }
3181
3182
3183 static inline int min_int(int a, int b)
3184 {
3185         if (a < b)
3186                 return a;
3187         return b;
3188 }
3189
3190
3191 static int get_key_handler(struct nl_msg *msg, void *arg)
3192 {
3193         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3194         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3195
3196         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3197                   genlmsg_attrlen(gnlh, 0), NULL);
3198
3199         /*
3200          * TODO: validate the key index and mac address!
3201          * Otherwise, there's a race condition as soon as
3202          * the kernel starts sending key notifications.
3203          */
3204
3205         if (tb[NL80211_ATTR_KEY_SEQ])
3206                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3207                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3208         return NL_SKIP;
3209 }
3210
3211
3212 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3213                            int idx, u8 *seq)
3214 {
3215         struct wpa_driver_nl80211_data *drv = priv;
3216         struct nl_msg *msg;
3217
3218         msg = nlmsg_alloc();
3219         if (!msg)
3220                 return -ENOMEM;
3221
3222         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3223                     0, NL80211_CMD_GET_KEY, 0);
3224
3225         if (addr)
3226                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3227         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3228         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3229
3230         memset(seq, 0, 6);
3231
3232         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3233  nla_put_failure:
3234         return -ENOBUFS;
3235 }
3236
3237
3238 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3239                               int mode)
3240 {
3241         struct wpa_driver_nl80211_data *drv = priv;
3242         struct nl_msg *msg;
3243         u8 rates[NL80211_MAX_SUPP_RATES];
3244         u8 rates_len = 0;
3245         int i;
3246
3247         msg = nlmsg_alloc();
3248         if (!msg)
3249                 return -ENOMEM;
3250
3251         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3252                     NL80211_CMD_SET_BSS, 0);
3253
3254         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3255                 rates[rates_len++] = basic_rates[i] / 5;
3256
3257         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3258
3259         /* TODO: multi-BSS support */
3260         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3261
3262         return send_and_recv_msgs(drv, msg, NULL, NULL);
3263  nla_put_failure:
3264         return -ENOBUFS;
3265 }
3266
3267
3268 /* Set kernel driver on given frequency (MHz) */
3269 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3270 {
3271         struct wpa_driver_nl80211_data *drv = priv;
3272         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3273                                            freq->sec_channel_offset);
3274 }
3275
3276
3277 static int i802_set_rts(void *priv, int rts)
3278 {
3279 #ifdef NO_WEXT
3280         return -1;
3281 #else /* NO_WEXT */
3282         struct wpa_driver_nl80211_data *drv = priv;
3283         struct iwreq iwr;
3284
3285         memset(&iwr, 0, sizeof(iwr));
3286         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3287         iwr.u.rts.value = rts;
3288         iwr.u.rts.fixed = 1;
3289
3290         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3291                 perror("ioctl[SIOCSIWRTS]");
3292                 return -1;
3293         }
3294
3295         return 0;
3296 #endif /* NO_WEXT */
3297 }
3298
3299
3300 static int i802_set_frag(void *priv, int frag)
3301 {
3302 #ifdef NO_WEXT
3303         return -1;
3304 #else /* NO_WEXT */
3305         struct wpa_driver_nl80211_data *drv = priv;
3306         struct iwreq iwr;
3307
3308         memset(&iwr, 0, sizeof(iwr));
3309         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3310         iwr.u.frag.value = frag;
3311         iwr.u.frag.fixed = 1;
3312
3313         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3314                 perror("ioctl[SIOCSIWFRAG]");
3315                 return -1;
3316         }
3317
3318         return 0;
3319 #endif /* NO_WEXT */
3320 }
3321
3322
3323 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3324 {
3325 #ifdef NO_WEXT
3326         return -1;
3327 #else /* NO_WEXT */
3328         struct wpa_driver_nl80211_data *drv = priv;
3329         struct iwreq iwr;
3330
3331         memset(&iwr, 0, sizeof(iwr));
3332         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3333
3334         iwr.u.retry.value = short_retry;
3335         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3336         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3337                 perror("ioctl[SIOCSIWRETRY(short)]");
3338                 return -1;
3339         }
3340
3341         iwr.u.retry.value = long_retry;
3342         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3343         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3344                 perror("ioctl[SIOCSIWRETRY(long)]");
3345                 return -1;
3346         }
3347
3348         return 0;
3349 #endif /* NO_WEXT */
3350 }
3351
3352
3353 static int i802_flush(void *priv)
3354 {
3355         struct wpa_driver_nl80211_data *drv = priv;
3356         struct nl_msg *msg;
3357
3358         msg = nlmsg_alloc();
3359         if (!msg)
3360                 return -1;
3361
3362         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3363                     0, NL80211_CMD_DEL_STATION, 0);
3364
3365         /*
3366          * XXX: FIX! this needs to flush all VLANs too
3367          */
3368         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3369                     if_nametoindex(drv->ifname));
3370
3371         return send_and_recv_msgs(drv, msg, NULL, NULL);
3372  nla_put_failure:
3373         return -ENOBUFS;
3374 }
3375
3376
3377 static int get_sta_handler(struct nl_msg *msg, void *arg)
3378 {
3379         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3380         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3381         struct hostap_sta_driver_data *data = arg;
3382         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3383         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3384                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3385                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3386                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3387                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3388                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3389         };
3390
3391         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3392                   genlmsg_attrlen(gnlh, 0), NULL);
3393
3394         /*
3395          * TODO: validate the interface and mac address!
3396          * Otherwise, there's a race condition as soon as
3397          * the kernel starts sending station notifications.
3398          */
3399
3400         if (!tb[NL80211_ATTR_STA_INFO]) {
3401                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3402                 return NL_SKIP;
3403         }
3404         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3405                              tb[NL80211_ATTR_STA_INFO],
3406                              stats_policy)) {
3407                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3408                 return NL_SKIP;
3409         }
3410
3411         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3412                 data->inactive_msec =
3413                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3414         if (stats[NL80211_STA_INFO_RX_BYTES])
3415                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3416         if (stats[NL80211_STA_INFO_TX_BYTES])
3417                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3418         if (stats[NL80211_STA_INFO_RX_PACKETS])
3419                 data->rx_packets =
3420                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3421         if (stats[NL80211_STA_INFO_TX_PACKETS])
3422                 data->tx_packets =
3423                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3424
3425         return NL_SKIP;
3426 }
3427
3428 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3429                               const u8 *addr)
3430 {
3431         struct wpa_driver_nl80211_data *drv = priv;
3432         struct nl_msg *msg;
3433
3434         os_memset(data, 0, sizeof(*data));
3435         msg = nlmsg_alloc();
3436         if (!msg)
3437                 return -ENOMEM;
3438
3439         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3440                     0, NL80211_CMD_GET_STATION, 0);
3441
3442         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3443         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3444
3445         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3446  nla_put_failure:
3447         return -ENOBUFS;
3448 }
3449
3450
3451 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3452                            size_t data_len, int encrypt, const u8 *own_addr)
3453 {
3454         struct wpa_driver_nl80211_data *drv = priv;
3455         struct ieee80211_hdr *hdr;
3456         size_t len;
3457         u8 *pos;
3458         int res;
3459 #if 0 /* FIX */
3460         int qos = sta->flags & WLAN_STA_WME;
3461 #else
3462         int qos = 0;
3463 #endif
3464
3465         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3466                 data_len;
3467         hdr = os_zalloc(len);
3468         if (hdr == NULL) {
3469                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3470                        (unsigned long) len);
3471                 return -1;
3472         }
3473
3474         hdr->frame_control =
3475                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3476         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3477         if (encrypt)
3478                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3479 #if 0 /* To be enabled if qos determination is added above */
3480         if (qos) {
3481                 hdr->frame_control |=
3482                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3483         }
3484 #endif
3485
3486         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3487         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3488         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3489         pos = (u8 *) (hdr + 1);
3490
3491 #if 0 /* To be enabled if qos determination is added above */
3492         if (qos) {
3493                 /* add an empty QoS header if needed */
3494                 pos[0] = 0;
3495                 pos[1] = 0;
3496                 pos += 2;
3497         }
3498 #endif
3499
3500         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3501         pos += sizeof(rfc1042_header);
3502         WPA_PUT_BE16(pos, ETH_P_PAE);
3503         pos += 2;
3504         memcpy(pos, data, data_len);
3505
3506         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3507         if (res < 0) {
3508                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3509                            "failed: %d (%s)",
3510                            (unsigned long) len, errno, strerror(errno));
3511         }
3512         free(hdr);
3513
3514         return res;
3515 }
3516
3517
3518 static int i802_sta_set_flags(void *priv, const u8 *addr,
3519                               int total_flags, int flags_or, int flags_and)
3520 {
3521         struct wpa_driver_nl80211_data *drv = priv;
3522         struct nl_msg *msg, *flags = NULL;
3523
3524         msg = nlmsg_alloc();
3525         if (!msg)
3526                 return -ENOMEM;
3527
3528         flags = nlmsg_alloc();
3529         if (!flags) {
3530                 nlmsg_free(msg);
3531                 return -ENOMEM;
3532         }
3533
3534         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3535                     0, NL80211_CMD_SET_STATION, 0);
3536
3537         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3538                     if_nametoindex(drv->ifname));
3539         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3540
3541         if (total_flags & WLAN_STA_AUTHORIZED)
3542                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3543
3544         if (total_flags & WLAN_STA_WMM)
3545                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3546
3547         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3548                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3549
3550         if (total_flags & WLAN_STA_MFP)
3551                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3552
3553         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3554                 goto nla_put_failure;
3555
3556         nlmsg_free(flags);
3557
3558         return send_and_recv_msgs(drv, msg, NULL, NULL);
3559  nla_put_failure:
3560         nlmsg_free(flags);
3561         return -ENOBUFS;
3562 }
3563
3564
3565 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3566                                     int cw_min, int cw_max, int burst_time)
3567 {
3568         struct wpa_driver_nl80211_data *drv = priv;
3569         struct nl_msg *msg;
3570         struct nlattr *txq, *params;
3571
3572         msg = nlmsg_alloc();
3573         if (!msg)
3574                 return -1;
3575
3576         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3577                     0, NL80211_CMD_SET_WIPHY, 0);
3578
3579         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3580
3581         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3582         if (!txq)
3583                 goto nla_put_failure;
3584
3585         /* We are only sending parameters for a single TXQ at a time */
3586         params = nla_nest_start(msg, 1);
3587         if (!params)
3588                 goto nla_put_failure;
3589
3590         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3591         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3592          * 32 usec, so need to convert the value here. */
3593         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3594         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3595         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3596         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3597
3598         nla_nest_end(msg, params);
3599
3600         nla_nest_end(msg, txq);
3601
3602         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3603                 return 0;
3604  nla_put_failure:
3605         return -1;
3606 }
3607
3608
3609 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3610 {
3611         struct wpa_driver_nl80211_data *drv = priv;
3612         int ifidx;
3613         struct i802_bss *bss;
3614
3615         bss = os_zalloc(sizeof(*bss));
3616         if (bss == NULL)
3617                 return -1;
3618
3619         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3620         if (ifidx < 0) {
3621                 os_free(bss);
3622                 return -1;
3623         }
3624         bss->ifindex = ifidx;
3625         if (hostapd_set_iface_flags(priv, ifname, 1)) {
3626                 nl80211_remove_iface(priv, ifidx);
3627                 os_free(bss);
3628                 return -1;
3629         }
3630         bss->next = drv->bss.next;
3631         drv->bss.next = bss;
3632         return 0;
3633 }
3634
3635
3636 static int i802_bss_remove(void *priv, const char *ifname)
3637 {
3638         struct wpa_driver_nl80211_data *drv = priv;
3639         struct i802_bss *bss, *prev;
3640         int ifindex = if_nametoindex(ifname);
3641         nl80211_remove_iface(priv, ifindex);
3642         prev = &drv->bss;
3643         bss = drv->bss.next;
3644         while (bss) {
3645                 if (ifindex == bss->ifindex) {
3646                         prev->next = bss->next;
3647                         os_free(bss);
3648                         break;
3649                 }
3650                 prev = bss;
3651                 bss = bss->next;
3652         }
3653         return 0;
3654 }
3655
3656
3657 static int i802_set_beacon(const char *iface, void *priv,
3658                            const u8 *head, size_t head_len,
3659                            const u8 *tail, size_t tail_len, int dtim_period)
3660 {
3661         return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3662                                                    head, head_len,
3663                                                    tail, tail_len,
3664                                                    dtim_period);
3665 }
3666
3667
3668 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3669 {
3670         struct wpa_driver_nl80211_data *drv = priv;
3671         struct nl_msg *msg;
3672
3673         msg = nlmsg_alloc();
3674         if (!msg)
3675                 return -ENOMEM;
3676
3677         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3678                     NL80211_CMD_SET_BSS, 0);
3679
3680         if (cts >= 0)
3681                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3682         if (preamble >= 0)
3683                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3684         if (slot >= 0)
3685                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3686
3687         /* TODO: multi-BSS support */
3688         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3689
3690         return send_and_recv_msgs(drv, msg, NULL, NULL);
3691  nla_put_failure:
3692         return -ENOBUFS;
3693 }
3694
3695
3696 static int i802_set_cts_protect(void *priv, int value)
3697 {
3698         return i802_set_bss(priv, value, -1, -1);
3699 }
3700
3701
3702 static int i802_set_preamble(void *priv, int value)
3703 {
3704         return i802_set_bss(priv, -1, value, -1);
3705 }
3706
3707
3708 static int i802_set_short_slot_time(void *priv, int value)
3709 {
3710         return i802_set_bss(priv, -1, -1, value);
3711 }
3712
3713
3714 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3715 {
3716         switch (type) {
3717         case HOSTAPD_IF_VLAN:
3718                 return NL80211_IFTYPE_AP_VLAN;
3719         }
3720         return -1;
3721 }
3722
3723
3724 static int i802_if_add(const char *iface, void *priv,
3725                        enum hostapd_driver_if_type type, char *ifname,
3726                        const u8 *addr)
3727 {
3728         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3729                 return -1;
3730         return 0;
3731 }
3732
3733
3734 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3735                           char *ifname, const u8 *addr)
3736 {
3737         /* unused at the moment */
3738         return -1;
3739 }
3740
3741
3742 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3743                           const char *ifname, const u8 *addr)
3744 {
3745         nl80211_remove_iface(priv, if_nametoindex(ifname));
3746         return 0;
3747 }
3748
3749
3750 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3751                              const char *ifname, int vlan_id)
3752 {
3753         struct wpa_driver_nl80211_data *drv = priv;
3754         struct nl_msg *msg;
3755
3756         msg = nlmsg_alloc();
3757         if (!msg)
3758                 return -ENOMEM;
3759
3760         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3761                     0, NL80211_CMD_SET_STATION, 0);
3762
3763         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3764                     if_nametoindex(drv->ifname));
3765         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3766         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3767                     if_nametoindex(ifname));
3768
3769         return send_and_recv_msgs(drv, msg, NULL, NULL);
3770  nla_put_failure:
3771         return -ENOBUFS;
3772 }
3773
3774
3775 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3776 {
3777         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3778         struct sockaddr_ll lladdr;
3779         unsigned char buf[3000];
3780         int len;
3781         socklen_t fromlen = sizeof(lladdr);
3782
3783         len = recvfrom(sock, buf, sizeof(buf), 0,
3784                        (struct sockaddr *)&lladdr, &fromlen);
3785         if (len < 0) {
3786                 perror("recv");
3787                 return;
3788         }
3789
3790         if (have_ifidx(drv, lladdr.sll_ifindex)) {
3791                 void *ctx;
3792                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
3793                 if (!ctx)
3794                         return;
3795                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
3796         }
3797 }
3798
3799
3800 static int i802_get_inact_sec(void *priv, const u8 *addr)
3801 {
3802         struct hostap_sta_driver_data data;
3803         int ret;
3804
3805         data.inactive_msec = (unsigned long) -1;
3806         ret = i802_read_sta_data(priv, &data, addr);
3807         if (ret || data.inactive_msec == (unsigned long) -1)
3808                 return -1;
3809         return data.inactive_msec / 1000;
3810 }
3811
3812
3813 static int i802_sta_clear_stats(void *priv, const u8 *addr)
3814 {
3815 #if 0
3816         /* TODO */
3817 #endif
3818         return 0;
3819 }
3820
3821
3822 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
3823                            int reason)
3824 {
3825         struct wpa_driver_nl80211_data *drv = priv;
3826         struct ieee80211_mgmt mgmt;
3827
3828         memset(&mgmt, 0, sizeof(mgmt));
3829         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3830                                           WLAN_FC_STYPE_DEAUTH);
3831         memcpy(mgmt.da, addr, ETH_ALEN);
3832         memcpy(mgmt.sa, own_addr, ETH_ALEN);
3833         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
3834         mgmt.u.deauth.reason_code = host_to_le16(reason);
3835         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3836                                             IEEE80211_HDRLEN +
3837                                             sizeof(mgmt.u.deauth));
3838 }
3839
3840
3841 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
3842                              int reason)
3843 {
3844         struct wpa_driver_nl80211_data *drv = priv;
3845         struct ieee80211_mgmt mgmt;
3846
3847         memset(&mgmt, 0, sizeof(mgmt));
3848         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3849                                           WLAN_FC_STYPE_DISASSOC);
3850         memcpy(mgmt.da, addr, ETH_ALEN);
3851         memcpy(mgmt.sa, own_addr, ETH_ALEN);
3852         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
3853         mgmt.u.disassoc.reason_code = host_to_le16(reason);
3854         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3855                                             IEEE80211_HDRLEN +
3856                                             sizeof(mgmt.u.disassoc));
3857 }
3858
3859
3860 static void *i802_init(struct hostapd_data *hapd,
3861                        struct wpa_init_params *params)
3862 {
3863         struct wpa_driver_nl80211_data *drv;
3864         size_t i;
3865
3866         drv = wpa_driver_nl80211_init(hapd, params->ifname);
3867         if (drv == NULL)
3868                 return NULL;
3869
3870         drv->bss.ifindex = drv->ifindex;
3871
3872         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
3873         drv->if_indices = drv->default_if_indices;
3874         for (i = 0; i < params->num_bridge; i++) {
3875                 if (params->bridge[i])
3876                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
3877         }
3878
3879         /* start listening for EAPOL on the default AP interface */
3880         add_ifidx(drv, drv->ifindex);
3881
3882         if (params->bssid) {
3883                 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
3884                         goto failed;
3885
3886                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
3887                         goto failed;
3888         }
3889
3890         if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
3891                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
3892                            "into AP mode", drv->ifname);
3893                 goto failed;
3894         }
3895
3896         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3897                 goto failed;
3898
3899         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
3900         if (drv->eapol_sock < 0) {
3901                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
3902                 goto failed;
3903         }
3904
3905         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
3906         {
3907                 printf("Could not register read socket for eapol\n");
3908                 goto failed;
3909         }
3910
3911         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
3912                 goto failed;
3913
3914         return drv;
3915
3916 failed:
3917         nl80211_remove_monitor_interface(drv);
3918         if (drv->ioctl_sock >= 0)
3919                 close(drv->ioctl_sock);
3920
3921         genl_family_put(drv->nl80211);
3922         nl_cache_free(drv->nl_cache);
3923         nl_handle_destroy(drv->nl_handle);
3924         nl_cb_put(drv->nl_cb);
3925
3926         os_free(drv);
3927         return NULL;
3928 }
3929
3930
3931 static void i802_deinit(void *priv)
3932 {
3933         wpa_driver_nl80211_deinit(priv);
3934 }
3935
3936 #endif /* HOSTAPD */
3937
3938
3939 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
3940         .name = "nl80211",
3941         .desc = "Linux nl80211/cfg80211",
3942 #ifndef HOSTAPD
3943         .get_bssid = wpa_driver_nl80211_get_bssid,
3944         .get_ssid = wpa_driver_nl80211_get_ssid,
3945         .set_key = wpa_driver_nl80211_set_key,
3946 #endif /* HOSTAPD */
3947         .scan2 = wpa_driver_nl80211_scan,
3948         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
3949 #ifndef HOSTAPD
3950         .deauthenticate = wpa_driver_nl80211_deauthenticate,
3951         .disassociate = wpa_driver_nl80211_disassociate,
3952         .authenticate = wpa_driver_nl80211_authenticate,
3953         .associate = wpa_driver_nl80211_associate,
3954         .init = wpa_driver_nl80211_init,
3955         .deinit = wpa_driver_nl80211_deinit,
3956         .get_capa = wpa_driver_nl80211_get_capa,
3957         .set_operstate = wpa_driver_nl80211_set_operstate,
3958 #endif /* HOSTAPD */
3959         .set_country = wpa_driver_nl80211_set_country,
3960         .set_mode = wpa_driver_nl80211_set_mode,
3961 #ifdef CONFIG_AP
3962         .set_beacon = wpa_driver_nl80211_set_beacon,
3963 #endif /* CONFIG_AP */
3964 #if defined(CONFIG_AP) || defined(HOSTAPD)
3965         .send_mlme = wpa_driver_nl80211_send_mlme,
3966         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
3967         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
3968         .sta_add = wpa_driver_nl80211_sta_add,
3969         .sta_remove = wpa_driver_nl80211_sta_remove,
3970 #endif /* CONFIG_AP || HOSTAPD */
3971 #ifdef HOSTAPD
3972         .hapd_init = i802_init,
3973         .hapd_deinit = i802_deinit,
3974         .hapd_set_key = i802_set_key,
3975         .get_seqnum = i802_get_seqnum,
3976         .flush = i802_flush,
3977         .read_sta_data = i802_read_sta_data,
3978         .hapd_send_eapol = i802_send_eapol,
3979         .sta_set_flags = i802_sta_set_flags,
3980         .sta_deauth = i802_sta_deauth,
3981         .sta_disassoc = i802_sta_disassoc,
3982         .get_inact_sec = i802_get_inact_sec,
3983         .sta_clear_stats = i802_sta_clear_stats,
3984         .set_freq = i802_set_freq,
3985         .set_rts = i802_set_rts,
3986         .set_frag = i802_set_frag,
3987         .set_retry = i802_set_retry,
3988         .set_rate_sets = i802_set_rate_sets,
3989         .hapd_set_beacon = i802_set_beacon,
3990         .set_cts_protect = i802_set_cts_protect,
3991         .set_preamble = i802_set_preamble,
3992         .set_short_slot_time = i802_set_short_slot_time,
3993         .set_tx_queue_params = i802_set_tx_queue_params,
3994         .bss_add = i802_bss_add,
3995         .bss_remove = i802_bss_remove,
3996         .if_add = i802_if_add,
3997         .if_update = i802_if_update,
3998         .if_remove = i802_if_remove,
3999         .set_sta_vlan = i802_set_sta_vlan,
4000 #endif /* HOSTAPD */
4001 };