src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if_arp.h>
  22 #include <net/if.h>
  23 #include <netlink/genl/genl.h>
  24 #include <netlink/genl/family.h>
  25 #include <netlink/genl/ctrl.h>
  26 #include "nl80211_copy.h"
  27 #ifndef NO_WEXT
  28 #include "wireless_copy.h"
  29 #endif /* NO_WEXT */
  30
  31 #include "common.h"
  32 #include "driver.h"
  33 #include "eloop.h"
  34 #include "ieee802_11_defs.h"
  35
  36 #if defined(CONFIG_AP) || defined(HOSTAPD)
  37 #include <netpacket/packet.h>
  38 #include <linux/filter.h>
  39 #include "radiotap.h"
  40 #include "radiotap_iter.h"
  41
  42 #include "../../hostapd/hostapd_defs.h"
  43 #include "../../hostapd/sta_flags.h"
  44 #endif /* CONFIG_AP || HOSTAPD */
  45
  46 #ifdef HOSTAPD
  47 #include "ieee802_11_common.h"
  48 #endif /* HOSTAPD */
  49
  50 #ifdef CONFIG_LIBNL20
  51 /* libnl 2.0 compatibility code */
  52 #define nl_handle nl_sock
  53 #define nl_handle_alloc_cb nl_socket_alloc_cb
  54 #define nl_handle_destroy nl_socket_free
  55 #endif /* CONFIG_LIBNL20 */
  56
  57
  58 #ifndef IFF_LOWER_UP
  59 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  60 #endif
  61 #ifndef IFF_DORMANT
  62 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  63 #endif
  64
  65 #ifndef IF_OPER_DORMANT
  66 #define IF_OPER_DORMANT 5
  67 #endif
  68 #ifndef IF_OPER_UP
  69 #define IF_OPER_UP 6
  70 #endif
  71
  72 struct i802_bss {
  73         struct i802_bss *next;
  74         int ifindex;
  75         unsigned int beacon_set:1;
  76 };
  77
  78 struct wpa_driver_nl80211_data {
  79         void *ctx;
  80         int link_event_sock;
  81         int ioctl_sock; /* socket for ioctl() use */
  82         char ifname[IFNAMSIZ + 1];
  83         int ifindex;
  84         int if_removed;
  85         struct wpa_driver_capa capa;
  86         int has_capability;
  87
  88         int operstate;
  89
  90         int scan_complete_events;
  91
  92         struct nl_handle *nl_handle;
  93         struct nl_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_timeout_event(struct wpa_driver_nl80211_data *drv,
 744                                enum nl80211_commands cmd, struct nlattr *addr)
 745 {
 746         union wpa_event_data event;
 747         enum wpa_event_type ev;
 748
 749         if (nla_len(addr) != ETH_ALEN)
 750                 return;
 751
 752         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 753                    cmd, MAC2STR((u8 *) nla_data(addr)));
 754
 755         if (cmd == NL80211_CMD_AUTHENTICATE)
 756                 ev = EVENT_AUTH_TIMED_OUT;
 757         else if (cmd == NL80211_CMD_ASSOCIATE)
 758                 ev = EVENT_ASSOC_TIMED_OUT;
 759         else
 760                 return;
 761
 762         os_memset(&event, 0, sizeof(event));
 763         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 764         wpa_supplicant_event(drv->ctx, ev, &event);
 765 }
 766
 767
 768 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 769                        enum nl80211_commands cmd, struct nlattr *frame,
 770                        struct nlattr *addr, struct nlattr *timed_out)
 771 {
 772         if (timed_out && addr) {
 773                 mlme_timeout_event(drv, cmd, addr);
 774                 return;
 775         }
 776
 777         if (frame == NULL) {
 778                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 779                            "data", cmd);
 780                 return;
 781         }
 782
 783         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 784         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 785                     nla_data(frame), nla_len(frame));
 786
 787         switch (cmd) {
 788         case NL80211_CMD_AUTHENTICATE:
 789                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 790                 break;
 791         case NL80211_CMD_ASSOCIATE:
 792                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 793                 break;
 794         case NL80211_CMD_DEAUTHENTICATE:
 795                 drv->associated = 0;
 796                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 797                 break;
 798         case NL80211_CMD_DISASSOCIATE:
 799                 drv->associated = 0;
 800                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 801                 break;
 802         default:
 803                 break;
 804         }
 805 }
 806
 807 #endif /* HOSTAPD */
 808
 809
 810 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 811                                            struct nlattr *tb[])
 812 {
 813         union wpa_event_data data;
 814
 815         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 816         os_memset(&data, 0, sizeof(data));
 817         if (tb[NL80211_ATTR_MAC]) {
 818                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 819                             nla_data(tb[NL80211_ATTR_MAC]),
 820                             nla_len(tb[NL80211_ATTR_MAC]));
 821                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 822         }
 823         if (tb[NL80211_ATTR_KEY_SEQ]) {
 824                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 825                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 826                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 827         }
 828         if (tb[NL80211_ATTR_KEY_TYPE]) {
 829                 enum nl80211_key_type key_type =
 830                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 831                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 832                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 833                         data.michael_mic_failure.unicast = 1;
 834         } else
 835                 data.michael_mic_failure.unicast = 1;
 836
 837         if (tb[NL80211_ATTR_KEY_IDX]) {
 838                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 839                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 840         }
 841
 842         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 843 }
 844
 845
 846 static int process_event(struct nl_msg *msg, void *arg)
 847 {
 848         struct wpa_driver_nl80211_data *drv = arg;
 849         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 850         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 851
 852         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 853                   genlmsg_attrlen(gnlh, 0), NULL);
 854
 855         if (tb[NL80211_ATTR_IFINDEX]) {
 856                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 857                 if (ifindex != drv->ifindex) {
 858                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 859                                    " for foreign interface (ifindex %d)",
 860                                    gnlh->cmd, ifindex);
 861                         return NL_SKIP;
 862                 }
 863         }
 864
 865         if (drv->ap_scan_as_station &&
 866             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 867              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 868                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 869                 drv->ap_scan_as_station = 0;
 870         }
 871
 872         switch (gnlh->cmd) {
 873         case NL80211_CMD_NEW_SCAN_RESULTS:
 874                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 875                 drv->scan_complete_events = 1;
 876                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 877                                      drv->ctx);
 878                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 879                 break;
 880         case NL80211_CMD_SCAN_ABORTED:
 881                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 882                 /*
 883                  * Need to indicate that scan results are available in order
 884                  * not to make wpa_supplicant stop its scanning.
 885                  */
 886                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 887                                      drv->ctx);
 888                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 889                 break;
 890 #ifndef HOSTAPD
 891         case NL80211_CMD_AUTHENTICATE:
 892         case NL80211_CMD_ASSOCIATE:
 893         case NL80211_CMD_DEAUTHENTICATE:
 894         case NL80211_CMD_DISASSOCIATE:
 895                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 896                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
 897                 break;
 898 #endif /* HOSTAPD */
 899         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 900                 mlme_event_michael_mic_failure(drv, tb);
 901                 break;
 902         default:
 903                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 904                            "(cmd=%d)", gnlh->cmd);
 905                 break;
 906         }
 907
 908         return NL_SKIP;
 909 }
 910
 911
 912 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 913                                              void *sock_ctx)
 914 {
 915         struct nl_cb *cb;
 916         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 917
 918         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 919
 920         cb = nl_cb_clone(drv->nl_cb);
 921         if (!cb)
 922                 return;
 923         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 924         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 925         nl_recvmsgs(drv->nl_handle, cb);
 926         nl_cb_put(cb);
 927 }
 928
 929
 930 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 931                                    const char *ifname, int dev_up)
 932 {
 933         struct ifreq ifr;
 934
 935         if (drv->ioctl_sock < 0)
 936                 return -1;
 937
 938         os_memset(&ifr, 0, sizeof(ifr));
 939         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 940
 941         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 942                 perror("ioctl[SIOCGIFFLAGS]");
 943                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 944                            ifname);
 945                 return -1;
 946         }
 947
 948         if (dev_up) {
 949                 if (ifr.ifr_flags & IFF_UP)
 950                         return 0;
 951                 ifr.ifr_flags |= IFF_UP;
 952         } else {
 953                 if (!(ifr.ifr_flags & IFF_UP))
 954                         return 0;
 955                 ifr.ifr_flags &= ~IFF_UP;
 956         }
 957
 958         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 959                 perror("ioctl[SIOCSIFFLAGS]");
 960                 return -1;
 961         }
 962
 963         return 0;
 964 }
 965
 966
 967 /**
 968  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 969  * @priv: driver_nl80211 private data
 970  * @alpha2_arg: country to which to switch to
 971  * Returns: 0 on success, -1 on failure
 972  *
 973  * This asks nl80211 to set the regulatory domain for given
 974  * country ISO / IEC alpha2.
 975  */
 976 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 977 {
 978         struct wpa_driver_nl80211_data *drv = priv;
 979         char alpha2[3];
 980         struct nl_msg *msg;
 981
 982         msg = nlmsg_alloc();
 983         if (!msg)
 984                 return -ENOMEM;
 985
 986         alpha2[0] = alpha2_arg[0];
 987         alpha2[1] = alpha2_arg[1];
 988         alpha2[2] = '\0';
 989
 990         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 991                     0, NL80211_CMD_REQ_SET_REG, 0);
 992
 993         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 994         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 995                 return -EINVAL;
 996         return 0;
 997 nla_put_failure:
 998         return -EINVAL;
 999 }
1000
1001
1002 #ifndef HOSTAPD
1003 struct wiphy_info_data {
1004         int max_scan_ssids;
1005         int ap_supported;
1006 };
1007
1008
1009 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1010 {
1011         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1012         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1013         struct wiphy_info_data *info = arg;
1014
1015         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1016                   genlmsg_attrlen(gnlh, 0), NULL);
1017
1018         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1019                 info->max_scan_ssids =
1020                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1021
1022         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1023                 struct nlattr *nl_mode;
1024                 int i;
1025                 nla_for_each_nested(nl_mode,
1026                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1027                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1028                                 info->ap_supported = 1;
1029                                 break;
1030                         }
1031                 }
1032         }
1033
1034         return NL_SKIP;
1035 }
1036
1037
1038 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1039                                        struct wiphy_info_data *info)
1040 {
1041         struct nl_msg *msg;
1042
1043         os_memset(info, 0, sizeof(*info));
1044         msg = nlmsg_alloc();
1045         if (!msg)
1046                 return -1;
1047
1048         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1049                     0, NL80211_CMD_GET_WIPHY, 0);
1050
1051         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1052
1053         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1054                 return 0;
1055         msg = NULL;
1056 nla_put_failure:
1057         nlmsg_free(msg);
1058         return -1;
1059 }
1060
1061
1062 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1063 {
1064         struct wiphy_info_data info;
1065         if (wpa_driver_nl80211_get_info(drv, &info))
1066                 return;
1067         drv->has_capability = 1;
1068         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1069         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1070                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1071                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1072                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1073         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1074                 WPA_DRIVER_CAPA_ENC_WEP104 |
1075                 WPA_DRIVER_CAPA_ENC_TKIP |
1076                 WPA_DRIVER_CAPA_ENC_CCMP;
1077
1078         drv->capa.max_scan_ssids = info.max_scan_ssids;
1079         if (info.ap_supported)
1080                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1081 }
1082 #endif /* HOSTAPD */
1083
1084
1085 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1086                                       void *ctx)
1087 {
1088         int ret;
1089
1090         /* Initialize generic netlink and nl80211 */
1091
1092         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1093         if (drv->nl_cb == NULL) {
1094                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1095                            "callbacks");
1096                 goto err1;
1097         }
1098
1099         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1100         if (drv->nl_handle == NULL) {
1101                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1102                            "callbacks");
1103                 goto err2;
1104         }
1105
1106         if (genl_connect(drv->nl_handle)) {
1107                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1108                            "netlink");
1109                 goto err3;
1110         }
1111
1112 #ifdef CONFIG_LIBNL20
1113         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1114                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1115                            "netlink cache");
1116                 goto err3;
1117         }
1118 #else /* CONFIG_LIBNL20 */
1119         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1120         if (drv->nl_cache == NULL) {
1121                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1122                            "netlink cache");
1123                 goto err3;
1124         }
1125 #endif /* CONFIG_LIBNL20 */
1126
1127
1128         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1129         if (drv->nl80211 == NULL) {
1130                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1131                            "found");
1132                 goto err4;
1133         }
1134
1135         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1136         if (ret >= 0)
1137                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1138         if (ret < 0) {
1139                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1140                            "membership for scan events: %d (%s)",
1141                            ret, strerror(-ret));
1142                 goto err4;
1143         }
1144
1145         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1146         if (ret >= 0)
1147                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1148         if (ret < 0) {
1149                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1150                            "membership for mlme events: %d (%s)",
1151                            ret, strerror(-ret));
1152                 goto err4;
1153         }
1154
1155         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1156                                  wpa_driver_nl80211_event_receive, drv, ctx);
1157
1158         return 0;
1159
1160 err4:
1161         nl_cache_free(drv->nl_cache);
1162 err3:
1163         nl_handle_destroy(drv->nl_handle);
1164 err2:
1165         nl_cb_put(drv->nl_cb);
1166 err1:
1167         return -1;
1168 }
1169
1170
1171 static int wpa_driver_nl80211_init_link_events(
1172         struct wpa_driver_nl80211_data *drv)
1173 {
1174 #ifdef HOSTAPD
1175         return 0;
1176 #else /* HOSTAPD */
1177         int s;
1178         struct sockaddr_nl local;
1179
1180         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1181         if (s < 0) {
1182                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1183                 return -1;
1184         }
1185
1186         os_memset(&local, 0, sizeof(local));
1187         local.nl_family = AF_NETLINK;
1188         local.nl_groups = RTMGRP_LINK;
1189         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1190                 perror("bind(netlink)");
1191                 close(s);
1192                 return -1;
1193         }
1194
1195         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1196                                  drv->ctx);
1197         drv->link_event_sock = s;
1198
1199         return 0;
1200 #endif /* HOSTAPD */
1201 }
1202
1203
1204 /**
1205  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1206  * @ctx: context to be used when calling wpa_supplicant functions,
1207  * e.g., wpa_supplicant_event()
1208  * @ifname: interface name, e.g., wlan0
1209  * Returns: Pointer to private data, %NULL on failure
1210  */
1211 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1212 {
1213         struct wpa_driver_nl80211_data *drv;
1214
1215         drv = os_zalloc(sizeof(*drv));
1216         if (drv == NULL)
1217                 return NULL;
1218         drv->ctx = ctx;
1219         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1220         drv->monitor_ifidx = -1;
1221         drv->monitor_sock = -1;
1222         drv->link_event_sock = -1;
1223         drv->ioctl_sock = -1;
1224
1225         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1226                 os_free(drv);
1227                 return NULL;
1228         }
1229
1230         drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1231
1232         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1233         if (drv->ioctl_sock < 0) {
1234                 perror("socket(PF_INET,SOCK_DGRAM)");
1235                 goto failed;
1236         }
1237
1238         if (wpa_driver_nl80211_init_link_events(drv) ||
1239             wpa_driver_nl80211_finish_drv_init(drv))
1240                 goto failed;
1241
1242         return drv;
1243
1244 failed:
1245         if (drv->link_event_sock >= 0) {
1246                 eloop_unregister_read_sock(drv->link_event_sock);
1247                 close(drv->link_event_sock);
1248         }
1249         if (drv->ioctl_sock >= 0)
1250                 close(drv->ioctl_sock);
1251
1252         genl_family_put(drv->nl80211);
1253         nl_cache_free(drv->nl_cache);
1254         nl_handle_destroy(drv->nl_handle);
1255         nl_cb_put(drv->nl_cb);
1256
1257         os_free(drv);
1258         return NULL;
1259 }
1260
1261
1262 static int
1263 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1264 {
1265         drv->ifindex = if_nametoindex(drv->ifname);
1266
1267 #ifndef HOSTAPD
1268         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1269                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1270                            "use managed mode");
1271         }
1272
1273         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1274                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1275                            "UP", drv->ifname);
1276                 return -1;
1277         }
1278
1279         wpa_driver_nl80211_capa(drv);
1280
1281         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1282 #endif /* HOSTAPD */
1283
1284         return 0;
1285 }
1286
1287
1288 #ifdef HOSTAPD
1289 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1290 {
1291         struct i802_bss *bss, *prev;
1292         bss = drv->bss.next;
1293         while (bss) {
1294                 prev = bss;
1295                 bss = bss->next;
1296                 os_free(bss);
1297         }
1298 }
1299 #endif /* HOSTAPD */
1300
1301
1302 #if defined(CONFIG_AP) || defined(HOSTAPD)
1303 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1304 {
1305         struct nl_msg *msg;
1306
1307         msg = nlmsg_alloc();
1308         if (!msg)
1309                 return -ENOMEM;
1310
1311         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1312                     0, NL80211_CMD_DEL_BEACON, 0);
1313         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1314
1315         return send_and_recv_msgs(drv, msg, NULL, NULL);
1316  nla_put_failure:
1317         return -ENOBUFS;
1318 }
1319 #endif /* CONFIG_AP || HOSTAPD */
1320
1321
1322 /**
1323  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1324  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1325  *
1326  * Shut down driver interface and processing of driver events. Free
1327  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1328  */
1329 static void wpa_driver_nl80211_deinit(void *priv)
1330 {
1331         struct wpa_driver_nl80211_data *drv = priv;
1332
1333 #if defined(CONFIG_AP) || defined(HOSTAPD)
1334         nl80211_remove_monitor_interface(drv);
1335         if (drv->monitor_sock >= 0) {
1336                 eloop_unregister_read_sock(drv->monitor_sock);
1337                 close(drv->monitor_sock);
1338         }
1339
1340         if (drv->nlmode == NL80211_IFTYPE_AP)
1341                 wpa_driver_nl80211_del_beacon(drv);
1342 #endif /* CONFIG_AP || HOSTAPD */
1343
1344 #ifdef HOSTAPD
1345         if (drv->last_freq_ht) {
1346                 /* Clear HT flags from the driver */
1347                 struct hostapd_freq_params freq;
1348                 os_memset(&freq, 0, sizeof(freq));
1349                 freq.freq = drv->last_freq;
1350                 i802_set_freq(priv, &freq);
1351         }
1352
1353         if (drv->eapol_sock >= 0) {
1354                 eloop_unregister_read_sock(drv->eapol_sock);
1355                 close(drv->eapol_sock);
1356         }
1357
1358         if (drv->if_indices != drv->default_if_indices)
1359                 os_free(drv->if_indices);
1360
1361         wpa_driver_nl80211_free_bss(drv);
1362 #else /* HOSTAPD */
1363 #ifndef NO_WEXT
1364         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1365 #endif /* NO_WEXT */
1366
1367         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1368
1369         if (drv->link_event_sock >= 0) {
1370                 eloop_unregister_read_sock(drv->link_event_sock);
1371                 close(drv->link_event_sock);
1372         }
1373 #endif /* HOSTAPD */
1374
1375         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1376
1377         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1378         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1379
1380         if (drv->ioctl_sock >= 0)
1381                 close(drv->ioctl_sock);
1382
1383         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1384         genl_family_put(drv->nl80211);
1385         nl_cache_free(drv->nl_cache);
1386         nl_handle_destroy(drv->nl_handle);
1387         nl_cb_put(drv->nl_cb);
1388
1389         os_free(drv);
1390 }
1391
1392
1393 /**
1394  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1395  * @eloop_ctx: Driver private data
1396  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1397  *
1398  * This function can be used as registered timeout when starting a scan to
1399  * generate a scan completed event if the driver does not report this.
1400  */
1401 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1402 {
1403         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1404         if (drv->ap_scan_as_station) {
1405                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1406                 drv->ap_scan_as_station = 0;
1407         }
1408         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1409         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1410 }
1411
1412
1413 /**
1414  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1415  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1416  * @params: Scan parameters
1417  * Returns: 0 on success, -1 on failure
1418  */
1419 static int wpa_driver_nl80211_scan(void *priv,
1420                                    struct wpa_driver_scan_params *params)
1421 {
1422         struct wpa_driver_nl80211_data *drv = priv;
1423         int ret = 0, timeout;
1424         struct nl_msg *msg, *ssids, *freqs;
1425         size_t i;
1426
1427         msg = nlmsg_alloc();
1428         ssids = nlmsg_alloc();
1429         freqs = nlmsg_alloc();
1430         if (!msg || !ssids || !freqs) {
1431                 nlmsg_free(msg);
1432                 nlmsg_free(ssids);
1433                 nlmsg_free(freqs);
1434                 return -1;
1435         }
1436
1437         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1438                     NL80211_CMD_TRIGGER_SCAN, 0);
1439
1440         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1441
1442         for (i = 0; i < params->num_ssids; i++) {
1443                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1444                         params->ssids[i].ssid);
1445         }
1446         if (params->num_ssids)
1447                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1448
1449         if (params->extra_ies) {
1450                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1451                         params->extra_ies);
1452         }
1453
1454         if (params->freqs) {
1455                 for (i = 0; params->freqs[i]; i++)
1456                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1457                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1458         }
1459
1460         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1461         msg = NULL;
1462         if (ret) {
1463                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1464                            "(%s)", ret, strerror(-ret));
1465 #ifdef HOSTAPD
1466                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1467                         /*
1468                          * mac80211 does not allow scan requests in AP mode, so
1469                          * try to do this in station mode.
1470                          */
1471                         if (wpa_driver_nl80211_set_mode(drv,
1472                                                         IEEE80211_MODE_INFRA))
1473                                 goto nla_put_failure;
1474
1475                         if (wpa_driver_nl80211_scan(drv, params)) {
1476                                 wpa_driver_nl80211_set_mode(drv,
1477                                                             IEEE80211_MODE_AP);
1478                                 goto nla_put_failure;
1479                         }
1480
1481                         /* Restore AP mode when processing scan results */
1482                         drv->ap_scan_as_station = 1;
1483                         ret = 0;
1484                 } else
1485                         goto nla_put_failure;
1486 #else /* HOSTAPD */
1487                 goto nla_put_failure;
1488 #endif /* HOSTAPD */
1489         }
1490
1491         /* Not all drivers generate "scan completed" wireless event, so try to
1492          * read results after a timeout. */
1493         timeout = 10;
1494         if (drv->scan_complete_events) {
1495                 /*
1496                  * The driver seems to deliver events to notify when scan is
1497                  * complete, so use longer timeout to avoid race conditions
1498                  * with scanning and following association request.
1499                  */
1500                 timeout = 30;
1501         }
1502         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1503                    "seconds", ret, timeout);
1504         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1505         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1506                                drv, drv->ctx);
1507
1508 nla_put_failure:
1509         nlmsg_free(ssids);
1510         nlmsg_free(msg);
1511         nlmsg_free(freqs);
1512         return ret;
1513 }
1514
1515
1516 static int bss_info_handler(struct nl_msg *msg, void *arg)
1517 {
1518         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1519         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1520         struct nlattr *bss[NL80211_BSS_MAX + 1];
1521         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1522                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1523                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1524                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1525                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1526                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1527                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1528                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1529                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1530         };
1531         struct wpa_scan_results *res = arg;
1532         struct wpa_scan_res **tmp;
1533         struct wpa_scan_res *r;
1534         const u8 *ie;
1535         size_t ie_len;
1536
1537         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1538                   genlmsg_attrlen(gnlh, 0), NULL);
1539         if (!tb[NL80211_ATTR_BSS])
1540                 return NL_SKIP;
1541         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1542                              bss_policy))
1543                 return NL_SKIP;
1544         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1545                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1546                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1547         } else {
1548                 ie = NULL;
1549                 ie_len = 0;
1550         }
1551
1552         r = os_zalloc(sizeof(*r) + ie_len);
1553         if (r == NULL)
1554                 return NL_SKIP;
1555         if (bss[NL80211_BSS_BSSID])
1556                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1557                           ETH_ALEN);
1558         if (bss[NL80211_BSS_FREQUENCY])
1559                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1560         if (bss[NL80211_BSS_BEACON_INTERVAL])
1561                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1562         if (bss[NL80211_BSS_CAPABILITY])
1563                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1564         r->flags |= WPA_SCAN_NOISE_INVALID;
1565         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1566                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1567                 r->level /= 100; /* mBm to dBm */
1568                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1569         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1570                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1571                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1572         } else
1573                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1574         if (bss[NL80211_BSS_TSF])
1575                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1576         r->ie_len = ie_len;
1577         if (ie)
1578                 os_memcpy(r + 1, ie, ie_len);
1579
1580         tmp = os_realloc(res->res,
1581                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1582         if (tmp == NULL) {
1583                 os_free(r);
1584                 return NL_SKIP;
1585         }
1586         tmp[res->num++] = r;
1587         res->res = tmp;
1588
1589         return NL_SKIP;
1590 }
1591
1592
1593 /**
1594  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1595  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1596  * Returns: Scan results on success, -1 on failure
1597  */
1598 static struct wpa_scan_results *
1599 wpa_driver_nl80211_get_scan_results(void *priv)
1600 {
1601         struct wpa_driver_nl80211_data *drv = priv;
1602         struct nl_msg *msg;
1603         struct wpa_scan_results *res;
1604         int ret;
1605
1606         res = os_zalloc(sizeof(*res));
1607         if (res == NULL)
1608                 return 0;
1609         msg = nlmsg_alloc();
1610         if (!msg)
1611                 goto nla_put_failure;
1612
1613         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1614                     NL80211_CMD_GET_SCAN, 0);
1615         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1616
1617         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1618         msg = NULL;
1619         if (ret == 0) {
1620                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1621                            (unsigned long) res->num);
1622                 return res;
1623         }
1624         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1625                    "(%s)", ret, strerror(-ret));
1626 nla_put_failure:
1627         nlmsg_free(msg);
1628         wpa_scan_results_free(res);
1629         return NULL;
1630 }
1631
1632
1633 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1634                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1635                        const u8 *seq, size_t seq_len,
1636                        const u8 *key, size_t key_len)
1637 {
1638         struct nl_msg *msg;
1639         int ret;
1640
1641         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1642                    "set_tx=%d seq_len=%lu key_len=%lu",
1643                    __func__, ifindex, alg, addr, key_idx, set_tx,
1644                    (unsigned long) seq_len, (unsigned long) key_len);
1645
1646         msg = nlmsg_alloc();
1647         if (!msg)
1648                 return -ENOMEM;
1649
1650         if (alg == WPA_ALG_NONE) {
1651                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1652                             0, NL80211_CMD_DEL_KEY, 0);
1653         } else {
1654                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1655                             0, NL80211_CMD_NEW_KEY, 0);
1656                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1657                 switch (alg) {
1658                 case WPA_ALG_WEP:
1659                         if (key_len == 5)
1660                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1661                                             0x000FAC01);
1662                         else
1663                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1664                                             0x000FAC05);
1665                         break;
1666                 case WPA_ALG_TKIP:
1667                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1668                         break;
1669                 case WPA_ALG_CCMP:
1670                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1671                         break;
1672                 case WPA_ALG_IGTK:
1673                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1674                         break;
1675                 default:
1676                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1677                                    "algorithm %d", __func__, alg);
1678                         nlmsg_free(msg);
1679                         return -1;
1680                 }
1681         }
1682
1683         if (seq && seq_len)
1684                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1685
1686         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1687         {
1688                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1689                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1690         }
1691         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1692         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1693
1694         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1695         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1696                 ret = 0;
1697         if (ret)
1698                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1699                            ret, strerror(-ret));
1700
1701         /*
1702          * If we failed or don't need to set the default TX key (below),
1703          * we're done here.
1704          */
1705         if (ret || !set_tx || alg == WPA_ALG_NONE)
1706                 return ret;
1707 #ifdef HOSTAPD /* FIX: is this needed? */
1708         if (addr)
1709                 return ret;
1710 #endif /* HOSTAPD */
1711
1712         msg = nlmsg_alloc();
1713         if (!msg)
1714                 return -ENOMEM;
1715
1716         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1717                     0, NL80211_CMD_SET_KEY, 0);
1718         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1719         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1720         if (alg == WPA_ALG_IGTK)
1721                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1722         else
1723                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1724
1725         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1726         if (ret == -ENOENT)
1727                 ret = 0;
1728         if (ret)
1729                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1730                            "err=%d %s)", ret, strerror(-ret));
1731         return ret;
1732
1733 nla_put_failure:
1734         return -ENOBUFS;
1735 }
1736
1737
1738 #ifndef HOSTAPD
1739
1740 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1741                                       const u8 *addr, int key_idx,
1742                                       int set_tx, const u8 *seq,
1743                                       size_t seq_len,
1744                                       const u8 *key, size_t key_len)
1745 {
1746         struct wpa_driver_nl80211_data *drv = priv;
1747         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1748                            seq_len, key, key_len);
1749 }
1750
1751
1752 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1753                                    const u8 *addr, int cmd, u16 reason_code)
1754 {
1755         int ret = -1;
1756         struct nl_msg *msg;
1757
1758         msg = nlmsg_alloc();
1759         if (!msg)
1760                 return -1;
1761
1762         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1763
1764         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1765         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1766         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1767
1768         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1769         msg = NULL;
1770         if (ret) {
1771                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1772                            "(%s)", ret, strerror(-ret));
1773                 goto nla_put_failure;
1774         }
1775         ret = 0;
1776
1777 nla_put_failure:
1778         nlmsg_free(msg);
1779         return ret;
1780 }
1781
1782
1783 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1784                                              int reason_code)
1785 {
1786         struct wpa_driver_nl80211_data *drv = priv;
1787         wpa_printf(MSG_DEBUG, "%s", __func__);
1788         drv->associated = 0;
1789         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1790                                        reason_code);
1791 }
1792
1793
1794 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1795                                            int reason_code)
1796 {
1797         struct wpa_driver_nl80211_data *drv = priv;
1798         wpa_printf(MSG_DEBUG, "%s", __func__);
1799         drv->associated = 0;
1800         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1801                                        reason_code);
1802 }
1803
1804
1805 static int wpa_driver_nl80211_authenticate(
1806         void *priv, struct wpa_driver_auth_params *params)
1807 {
1808         struct wpa_driver_nl80211_data *drv = priv;
1809         int ret = -1, i;
1810         struct nl_msg *msg;
1811         enum nl80211_auth_type type;
1812
1813         drv->associated = 0;
1814
1815         msg = nlmsg_alloc();
1816         if (!msg)
1817                 return -1;
1818
1819         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1820                    drv->ifindex);
1821
1822         for (i = 0; i < 4; i++) {
1823                 if (!params->wep_key[i])
1824                         continue;
1825                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1826                                            i == params->wep_tx_keyidx, NULL, 0,
1827                                            params->wep_key[i],
1828                                            params->wep_key_len[i]);
1829         }
1830
1831         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1832                     NL80211_CMD_AUTHENTICATE, 0);
1833
1834         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1835         if (params->bssid) {
1836                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1837                            MAC2STR(params->bssid));
1838                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1839         }
1840         if (params->freq) {
1841                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1842                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1843         }
1844         if (params->ssid) {
1845                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1846                                   params->ssid, params->ssid_len);
1847                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1848                         params->ssid);
1849         }
1850         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1851         if (params->ie)
1852                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1853         /*
1854          * TODO: if multiple auth_alg options enabled, try them one by one if
1855          * the AP rejects authentication due to unknown auth alg
1856          */
1857         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1858                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1859         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1860                 type = NL80211_AUTHTYPE_SHARED_KEY;
1861         else if (params->auth_alg & AUTH_ALG_LEAP)
1862                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1863         else if (params->auth_alg & AUTH_ALG_FT)
1864                 type = NL80211_AUTHTYPE_FT;
1865         else
1866                 goto nla_put_failure;
1867         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1868         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1869
1870         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1871         msg = NULL;
1872         if (ret) {
1873                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1874                            "(%s)", ret, strerror(-ret));
1875                 goto nla_put_failure;
1876         }
1877         ret = 0;
1878         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1879                    "successfully");
1880
1881 nla_put_failure:
1882         nlmsg_free(msg);
1883         return ret;
1884 }
1885
1886 #endif /* HOSTAPD */
1887
1888
1889 #if defined(CONFIG_AP) || defined(HOSTAPD)
1890
1891 struct phy_info_arg {
1892         u16 *num_modes;
1893         struct hostapd_hw_modes *modes;
1894 };
1895
1896 static int phy_info_handler(struct nl_msg *msg, void *arg)
1897 {
1898         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1899         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1900         struct phy_info_arg *phy_info = arg;
1901
1902         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1903
1904         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1905         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1906                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1907                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1908                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1909                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1910                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1911                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1912         };
1913
1914         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1915         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1916                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1917                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1918         };
1919
1920         struct nlattr *nl_band;
1921         struct nlattr *nl_freq;
1922         struct nlattr *nl_rate;
1923         int rem_band, rem_freq, rem_rate;
1924         struct hostapd_hw_modes *mode;
1925         int idx, mode_is_set;
1926
1927         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1928                   genlmsg_attrlen(gnlh, 0), NULL);
1929
1930         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1931                 return NL_SKIP;
1932
1933         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1934                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1935                 if (!mode)
1936                         return NL_SKIP;
1937                 phy_info->modes = mode;
1938
1939                 mode_is_set = 0;
1940
1941                 mode = &phy_info->modes[*(phy_info->num_modes)];
1942                 memset(mode, 0, sizeof(*mode));
1943                 *(phy_info->num_modes) += 1;
1944
1945                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1946                           nla_len(nl_band), NULL);
1947
1948                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1949                         mode->ht_capab = nla_get_u16(
1950                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1951                 }
1952
1953                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1954                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1955                                   nla_len(nl_freq), freq_policy);
1956                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1957                                 continue;
1958                         mode->num_channels++;
1959                 }
1960
1961                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1962                 if (!mode->channels)
1963                         return NL_SKIP;
1964
1965                 idx = 0;
1966
1967                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1968                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1969                                   nla_len(nl_freq), freq_policy);
1970                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1971                                 continue;
1972
1973                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1974                         mode->channels[idx].flag = 0;
1975
1976                         if (!mode_is_set) {
1977                                 /* crude heuristic */
1978                                 if (mode->channels[idx].freq < 4000)
1979                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1980                                 else
1981                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1982                                 mode_is_set = 1;
1983                         }
1984
1985                         /* crude heuristic */
1986                         if (mode->channels[idx].freq < 4000)
1987                                 if (mode->channels[idx].freq == 2484)
1988                                         mode->channels[idx].chan = 14;
1989                                 else
1990                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1991                         else
1992                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1993
1994                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1995                                 mode->channels[idx].flag |=
1996                                         HOSTAPD_CHAN_DISABLED;
1997                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1998                                 mode->channels[idx].flag |=
1999                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2000                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2001                                 mode->channels[idx].flag |=
2002                                         HOSTAPD_CHAN_NO_IBSS;
2003                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2004                                 mode->channels[idx].flag |=
2005                                         HOSTAPD_CHAN_RADAR;
2006
2007                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2008                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2009                                 mode->channels[idx].max_tx_power =
2010                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2011
2012                         idx++;
2013                 }
2014
2015                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2016                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2017                                   nla_len(nl_rate), rate_policy);
2018                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2019                                 continue;
2020                         mode->num_rates++;
2021                 }
2022
2023                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
2024                 if (!mode->rates)
2025                         return NL_SKIP;
2026
2027                 idx = 0;
2028
2029                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2030                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2031                                   nla_len(nl_rate), rate_policy);
2032                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2033                                 continue;
2034                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2035
2036                         /* crude heuristic */
2037                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2038                             mode->rates[idx].rate > 200)
2039                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2040
2041                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2042                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
2043
2044                         idx++;
2045                 }
2046         }
2047
2048         return NL_SKIP;
2049 }
2050
2051 static struct hostapd_hw_modes *
2052 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2053 {
2054         u16 m;
2055         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2056         int i, mode11g_idx = -1;
2057
2058         /* If only 802.11g mode is included, use it to construct matching
2059          * 802.11b mode data. */
2060
2061         for (m = 0; m < *num_modes; m++) {
2062                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2063                         return modes; /* 802.11b already included */
2064                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2065                         mode11g_idx = m;
2066         }
2067
2068         if (mode11g_idx < 0)
2069                 return modes; /* 2.4 GHz band not supported at all */
2070
2071         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2072         if (nmodes == NULL)
2073                 return modes; /* Could not add 802.11b mode */
2074
2075         mode = &nmodes[*num_modes];
2076         os_memset(mode, 0, sizeof(*mode));
2077         (*num_modes)++;
2078         modes = nmodes;
2079
2080         mode->mode = HOSTAPD_MODE_IEEE80211B;
2081
2082         mode11g = &modes[mode11g_idx];
2083         mode->num_channels = mode11g->num_channels;
2084         mode->channels = os_malloc(mode11g->num_channels *
2085                                    sizeof(struct hostapd_channel_data));
2086         if (mode->channels == NULL) {
2087                 (*num_modes)--;
2088                 return modes; /* Could not add 802.11b mode */
2089         }
2090         os_memcpy(mode->channels, mode11g->channels,
2091                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2092
2093         mode->num_rates = 0;
2094         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2095         if (mode->rates == NULL) {
2096                 os_free(mode->channels);
2097                 (*num_modes)--;
2098                 return modes; /* Could not add 802.11b mode */
2099         }
2100
2101         for (i = 0; i < mode11g->num_rates; i++) {
2102                 if (mode11g->rates[i].rate > 110 ||
2103                     mode11g->rates[i].flags &
2104                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2105                         continue;
2106                 mode->rates[mode->num_rates] = mode11g->rates[i];
2107                 mode->num_rates++;
2108                 if (mode->num_rates == 4)
2109                         break;
2110         }
2111
2112         if (mode->num_rates == 0) {
2113                 os_free(mode->channels);
2114                 os_free(mode->rates);
2115                 (*num_modes)--;
2116                 return modes; /* No 802.11b rates */
2117         }
2118
2119         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2120                    "information");
2121
2122         return modes;
2123 }
2124
2125
2126 static struct hostapd_hw_modes *
2127 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2128 {
2129         struct wpa_driver_nl80211_data *drv = priv;
2130         struct nl_msg *msg;
2131         struct phy_info_arg result = {
2132                 .num_modes = num_modes,
2133                 .modes = NULL,
2134         };
2135
2136         *num_modes = 0;
2137         *flags = 0;
2138
2139         msg = nlmsg_alloc();
2140         if (!msg)
2141                 return NULL;
2142
2143         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2144                     0, NL80211_CMD_GET_WIPHY, 0);
2145
2146         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2147
2148         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2149                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2150  nla_put_failure:
2151         return NULL;
2152 }
2153
2154
2155 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2156                                          const void *data, size_t len,
2157                                          int encrypt)
2158 {
2159         __u8 rtap_hdr[] = {
2160                 0x00, 0x00, /* radiotap version */
2161                 0x0e, 0x00, /* radiotap length */
2162                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2163                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2164                 0x00,       /* padding */
2165                 0x00, 0x00, /* RX and TX flags to indicate that */
2166                 0x00, 0x00, /* this is the injected frame directly */
2167         };
2168         struct iovec iov[2] = {
2169                 {
2170                         .iov_base = &rtap_hdr,
2171                         .iov_len = sizeof(rtap_hdr),
2172                 },
2173                 {
2174                         .iov_base = (void *) data,
2175                         .iov_len = len,
2176                 }
2177         };
2178         struct msghdr msg = {
2179                 .msg_name = NULL,
2180                 .msg_namelen = 0,
2181                 .msg_iov = iov,
2182                 .msg_iovlen = 2,
2183                 .msg_control = NULL,
2184                 .msg_controllen = 0,
2185                 .msg_flags = 0,
2186         };
2187
2188         if (encrypt)
2189                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2190
2191         return sendmsg(drv->monitor_sock, &msg, 0);
2192 }
2193
2194
2195 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2196                                         size_t data_len)
2197 {
2198         struct wpa_driver_nl80211_data *drv = priv;
2199         struct ieee80211_mgmt *mgmt;
2200         int encrypt = 1;
2201         u16 fc;
2202
2203         mgmt = (struct ieee80211_mgmt *) data;
2204         fc = le_to_host16(mgmt->frame_control);
2205
2206         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2207             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2208                 /*
2209                  * Only one of the authentication frame types is encrypted.
2210                  * In order for static WEP encryption to work properly (i.e.,
2211                  * to not encrypt the frame), we need to tell mac80211 about
2212                  * the frames that must not be encrypted.
2213                  */
2214                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2215                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2216                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2217                         encrypt = 0;
2218         }
2219
2220         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2221 }
2222
2223
2224 static int wpa_driver_nl80211_set_beacon_iface(int ifindex, void *priv,
2225                                                const u8 *head, size_t head_len,
2226                                                const u8 *tail, size_t tail_len,
2227                                                int dtim_period)
2228 {
2229         struct wpa_driver_nl80211_data *drv = priv;
2230         struct nl_msg *msg;
2231         u8 cmd = NL80211_CMD_NEW_BEACON;
2232         int ret;
2233         int beacon_set;
2234 #ifdef HOSTAPD
2235         struct i802_bss *bss;
2236
2237         bss = get_bss(drv, ifindex);
2238         if (bss == NULL)
2239                 return -ENOENT;
2240         beacon_set = bss->beacon_set;
2241 #else /* HOSTAPD */
2242         beacon_set = drv->beacon_set;
2243 #endif /* HOSTAPD */
2244
2245         msg = nlmsg_alloc();
2246         if (!msg)
2247                 return -ENOMEM;
2248
2249         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2250                    beacon_set);
2251         if (beacon_set)
2252                 cmd = NL80211_CMD_SET_BEACON;
2253
2254         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2255                     0, cmd, 0);
2256         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2257         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2258         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2259         if (!drv->beacon_int)
2260                 drv->beacon_int = 100;
2261         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
2262         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2263
2264         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2265         if (ret) {
2266                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2267                            ret, strerror(-ret));
2268         } else {
2269 #ifdef HOSTAPD
2270                 bss->beacon_set = 1;
2271 #else /* HOSTAPD */
2272                 drv->beacon_set = 1;
2273 #endif /* HOSTAPD */
2274         }
2275         return ret;
2276  nla_put_failure:
2277         return -ENOBUFS;
2278 }
2279
2280
2281 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2282 {
2283         struct wpa_driver_nl80211_data *drv = priv;
2284         struct nl_msg *msg;
2285
2286         drv->beacon_int = value;
2287
2288 #ifdef HOSTAPD
2289         if (!drv->bss.beacon_set)
2290                 return 0;
2291 #else /* HOSTAPD */
2292         if (!drv->beacon_set)
2293                 return 0;
2294 #endif /* HOSTAPD */
2295
2296         msg = nlmsg_alloc();
2297         if (!msg)
2298                 return -ENOMEM;
2299
2300         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d", value);
2301         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2302                     0, NL80211_CMD_SET_BEACON, 0);
2303         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2304
2305         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2306
2307         return send_and_recv_msgs(drv, msg, NULL, NULL);
2308  nla_put_failure:
2309         return -ENOBUFS;
2310 }
2311
2312
2313 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2314                                        int freq, int ht_enabled,
2315                                        int sec_channel_offset)
2316 {
2317         struct nl_msg *msg;
2318         int ret;
2319
2320         msg = nlmsg_alloc();
2321         if (!msg)
2322                 return -1;
2323
2324         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2325                     NL80211_CMD_SET_WIPHY, 0);
2326
2327         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2328         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2329         if (ht_enabled) {
2330                 switch (sec_channel_offset) {
2331                 case -1:
2332                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2333                                     NL80211_CHAN_HT40MINUS);
2334                         break;
2335                 case 1:
2336                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2337                                     NL80211_CHAN_HT40PLUS);
2338                         break;
2339                 default:
2340                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2341                                     NL80211_CHAN_HT20);
2342                         break;
2343                 }
2344         }
2345
2346         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2347         if (ret == 0)
2348                 return 0;
2349         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2350                    "%d (%s)", freq, ret, strerror(-ret));
2351 nla_put_failure:
2352         return -1;
2353 }
2354
2355
2356 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2357                                       struct hostapd_sta_add_params *params)
2358 {
2359         struct wpa_driver_nl80211_data *drv = priv;
2360         struct nl_msg *msg;
2361         int ret = -ENOBUFS;
2362
2363         msg = nlmsg_alloc();
2364         if (!msg)
2365                 return -ENOMEM;
2366
2367         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2368                     0, NL80211_CMD_NEW_STATION, 0);
2369
2370         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2371         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2372         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2373         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2374                 params->supp_rates);
2375         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2376                     params->listen_interval);
2377
2378 #ifdef CONFIG_IEEE80211N
2379         if (params->ht_capabilities) {
2380                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2381                         params->ht_capabilities->length,
2382                         &params->ht_capabilities->data);
2383         }
2384 #endif /* CONFIG_IEEE80211N */
2385
2386         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2387         if (ret)
2388                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2389                            "result: %d (%s)", ret, strerror(-ret));
2390         if (ret == -EEXIST)
2391                 ret = 0;
2392  nla_put_failure:
2393         return ret;
2394 }
2395
2396
2397 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2398 {
2399         struct wpa_driver_nl80211_data *drv = priv;
2400         struct nl_msg *msg;
2401         int ret;
2402
2403         msg = nlmsg_alloc();
2404         if (!msg)
2405                 return -ENOMEM;
2406
2407         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2408                     0, NL80211_CMD_DEL_STATION, 0);
2409
2410         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2411                     if_nametoindex(drv->ifname));
2412         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2413
2414         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2415         if (ret == -ENOENT)
2416                 return 0;
2417         return ret;
2418  nla_put_failure:
2419         return -ENOBUFS;
2420 }
2421
2422 #endif /* CONFIG_AP || HOSTAPD */
2423
2424
2425 #ifdef CONFIG_AP
2426
2427 static int wpa_driver_nl80211_set_beacon(void *priv,
2428                                          const u8 *head, size_t head_len,
2429                                          const u8 *tail, size_t tail_len,
2430                                          int dtim_period)
2431 {
2432         struct wpa_driver_nl80211_data *drv = priv;
2433         return wpa_driver_nl80211_set_beacon_iface(drv->ifindex, priv,
2434                                                    head, head_len,
2435                                                    tail, tail_len,
2436                                                    dtim_period);
2437 }
2438
2439 #endif /* CONFIG_AP */
2440
2441 #if defined(CONFIG_AP) || defined(HOSTAPD)
2442
2443 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2444                                  int ifidx)
2445 {
2446         struct nl_msg *msg;
2447
2448 #ifdef HOSTAPD
2449         /* stop listening for EAPOL on this interface */
2450         del_ifidx(drv, ifidx);
2451 #endif /* HOSTAPD */
2452
2453         msg = nlmsg_alloc();
2454         if (!msg)
2455                 goto nla_put_failure;
2456
2457         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2458                     0, NL80211_CMD_DEL_INTERFACE, 0);
2459         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2460
2461         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2462                 return;
2463  nla_put_failure:
2464         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2465                    ifidx);
2466 }
2467
2468
2469 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2470                                      const char *ifname,
2471                                      enum nl80211_iftype iftype,
2472                                      const u8 *addr)
2473 {
2474         struct nl_msg *msg, *flags = NULL;
2475         int ifidx;
2476         int ret = -ENOBUFS;
2477
2478         msg = nlmsg_alloc();
2479         if (!msg)
2480                 return -1;
2481
2482         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2483                     0, NL80211_CMD_NEW_INTERFACE, 0);
2484         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2485         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2486         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2487
2488         if (iftype == NL80211_IFTYPE_MONITOR) {
2489                 int err;
2490
2491                 flags = nlmsg_alloc();
2492                 if (!flags)
2493                         goto nla_put_failure;
2494
2495                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2496
2497                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2498
2499                 nlmsg_free(flags);
2500
2501                 if (err)
2502                         goto nla_put_failure;
2503         }
2504
2505         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2506         if (ret) {
2507  nla_put_failure:
2508                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2509                            ifname, ret, strerror(-ret));
2510                 return ret;
2511         }
2512
2513         ifidx = if_nametoindex(ifname);
2514
2515         if (ifidx <= 0)
2516                 return -1;
2517
2518 #ifdef HOSTAPD
2519         /* start listening for EAPOL on this interface */
2520         add_ifidx(drv, ifidx);
2521
2522         if (addr && iftype == NL80211_IFTYPE_AP &&
2523             set_ifhwaddr(drv, ifname, addr)) {
2524                 nl80211_remove_iface(drv, ifidx);
2525                 return -1;
2526         }
2527 #endif /* HOSTAPD */
2528
2529         return ifidx;
2530 }
2531 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2532                                 const char *ifname, enum nl80211_iftype iftype,
2533                                 const u8 *addr)
2534 {
2535         int ret;
2536
2537         ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2538
2539         /* if error occured and interface exists already */
2540         if (ret == -ENFILE && if_nametoindex(ifname)) {
2541                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2542
2543                 /* Try to remove the interface that was already there. */
2544                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2545
2546                 /* Try to create the interface again */
2547                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2548         }
2549
2550         return ret;
2551 }
2552
2553 #endif /* CONFIG_AP || HOSTAPD */
2554
2555 #ifdef CONFIG_AP
2556
2557 void ap_tx_status(void *ctx, const u8 *addr,
2558                   const u8 *buf, size_t len, int ack);
2559 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2560 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2561                 struct hostapd_frame_info *fi);
2562 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2563
2564 #endif /* CONFIG_AP */
2565
2566 #if defined(CONFIG_AP) || defined(HOSTAPD)
2567
2568 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2569 {
2570         struct ieee80211_hdr *hdr;
2571         u16 fc, type, stype;
2572
2573         hdr = (struct ieee80211_hdr *) buf;
2574         fc = le_to_host16(hdr->frame_control);
2575
2576         type = WLAN_FC_GET_TYPE(fc);
2577         stype = WLAN_FC_GET_STYPE(fc);
2578
2579         switch (type) {
2580         case WLAN_FC_TYPE_MGMT:
2581                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2582                            ok ? "ACK" : "fail");
2583 #ifdef HOSTAPD
2584                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2585 #else /* HOSTAPD */
2586                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2587 #endif /* HOSTAPD */
2588                 break;
2589         case WLAN_FC_TYPE_CTRL:
2590                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2591                            ok ? "ACK" : "fail");
2592                 break;
2593         case WLAN_FC_TYPE_DATA:
2594 #ifdef HOSTAPD
2595                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2596 #else /* HOSTAPD */
2597                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2598 #endif /* HOSTAPD */
2599                 break;
2600         default:
2601                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2602                            type);
2603                 break;
2604         }
2605 }
2606
2607
2608 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2609                              struct ieee80211_hdr *hdr, size_t len)
2610 {
2611 #ifdef HOSTAPD
2612         hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2613 #else /* HOSTAPD */
2614         ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2615 #endif /* HOSTAPD */
2616 }
2617
2618
2619 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2620                          u8 *buf, size_t len,
2621                          struct hostapd_frame_info *hfi)
2622 {
2623         struct ieee80211_hdr *hdr;
2624         u16 fc, stype;
2625
2626         hdr = (struct ieee80211_hdr *) buf;
2627         fc = le_to_host16(hdr->frame_control);
2628         stype = WLAN_FC_GET_STYPE(fc);
2629
2630         switch (WLAN_FC_GET_TYPE(fc)) {
2631         case WLAN_FC_TYPE_MGMT:
2632                 if (stype != WLAN_FC_STYPE_BEACON &&
2633                     stype != WLAN_FC_STYPE_PROBE_REQ)
2634                         wpa_printf(MSG_MSGDUMP, "MGMT");
2635 #ifdef HOSTAPD
2636                 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2637 #else /* HOSTAPD */
2638                 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2639 #endif /* HOSTAPD */
2640                 break;
2641         case WLAN_FC_TYPE_CTRL:
2642                 /* can only get here with PS-Poll frames */
2643                 wpa_printf(MSG_DEBUG, "CTRL");
2644                 from_unknown_sta(drv, hdr, len);
2645                 break;
2646         case WLAN_FC_TYPE_DATA:
2647                 from_unknown_sta(drv, hdr, len);
2648                 break;
2649         }
2650 }
2651
2652
2653 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2654 {
2655         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2656         int len;
2657         unsigned char buf[3000];
2658         struct ieee80211_radiotap_iterator iter;
2659         int ret;
2660         struct hostapd_frame_info hfi;
2661         int injected = 0, failed = 0, rxflags = 0;
2662
2663         len = recv(sock, buf, sizeof(buf), 0);
2664         if (len < 0) {
2665                 perror("recv");
2666                 return;
2667         }
2668
2669         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2670                 printf("received invalid radiotap frame\n");
2671                 return;
2672         }
2673
2674         memset(&hfi, 0, sizeof(hfi));
2675
2676         while (1) {
2677                 ret = ieee80211_radiotap_iterator_next(&iter);
2678                 if (ret == -ENOENT)
2679                         break;
2680                 if (ret) {
2681                         printf("received invalid radiotap frame (%d)\n", ret);
2682                         return;
2683                 }
2684                 switch (iter.this_arg_index) {
2685                 case IEEE80211_RADIOTAP_FLAGS:
2686                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2687                                 len -= 4;
2688                         break;
2689                 case IEEE80211_RADIOTAP_RX_FLAGS:
2690                         rxflags = 1;
2691                         break;
2692                 case IEEE80211_RADIOTAP_TX_FLAGS:
2693                         injected = 1;
2694                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2695                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2696                         break;
2697                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2698                         break;
2699                 case IEEE80211_RADIOTAP_CHANNEL:
2700                         /* TODO convert from freq/flags to channel number
2701                         hfi.channel = XXX;
2702                         hfi.phytype = XXX;
2703                          */
2704                         break;
2705                 case IEEE80211_RADIOTAP_RATE:
2706                         hfi.datarate = *iter.this_arg * 5;
2707                         break;
2708                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2709                         hfi.ssi_signal = *iter.this_arg;
2710                         break;
2711                 }
2712         }
2713
2714         if (rxflags && injected)
2715                 return;
2716
2717         if (!injected)
2718                 handle_frame(drv, buf + iter.max_length,
2719                              len - iter.max_length, &hfi);
2720         else
2721                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2722                                    len - iter.max_length, !failed);
2723 }
2724
2725
2726 /*
2727  * we post-process the filter code later and rewrite
2728  * this to the offset to the last instruction
2729  */
2730 #define PASS    0xFF
2731 #define FAIL    0xFE
2732
2733 static struct sock_filter msock_filter_insns[] = {
2734         /*
2735          * do a little-endian load of the radiotap length field
2736          */
2737         /* load lower byte into A */
2738         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2739         /* put it into X (== index register) */
2740         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2741         /* load upper byte into A */
2742         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2743         /* left-shift it by 8 */
2744         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2745         /* or with X */
2746         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2747         /* put result into X */
2748         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2749
2750         /*
2751          * Allow management frames through, this also gives us those
2752          * management frames that we sent ourselves with status
2753          */
2754         /* load the lower byte of the IEEE 802.11 frame control field */
2755         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2756         /* mask off frame type and version */
2757         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2758         /* accept frame if it's both 0, fall through otherwise */
2759         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2760
2761         /*
2762          * TODO: add a bit to radiotap RX flags that indicates
2763          * that the sending station is not associated, then
2764          * add a filter here that filters on our DA and that flag
2765          * to allow us to deauth frames to that bad station.
2766          *
2767          * Not a regression -- we didn't do it before either.
2768          */
2769
2770 #if 0
2771         /*
2772          * drop non-data frames, WDS frames
2773          */
2774         /* load the lower byte of the frame control field */
2775         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2776         /* mask off QoS bit */
2777         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2778         /* drop non-data frames */
2779         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2780         /* load the upper byte of the frame control field */
2781         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2782         /* mask off toDS/fromDS */
2783         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2784         /* drop WDS frames */
2785         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2786 #endif
2787
2788         /*
2789          * add header length to index
2790          */
2791         /* load the lower byte of the frame control field */
2792         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2793         /* mask off QoS bit */
2794         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2795         /* right shift it by 6 to give 0 or 2 */
2796         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2797         /* add data frame header length */
2798         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2799         /* add index, was start of 802.11 header */
2800         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2801         /* move to index, now start of LL header */
2802         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2803
2804         /*
2805          * Accept empty data frames, we use those for
2806          * polling activity.
2807          */
2808         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2809         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2810
2811         /*
2812          * Accept EAPOL frames
2813          */
2814         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2815         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2816         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2817         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2818
2819         /* keep these last two statements or change the code below */
2820         /* return 0 == "DROP" */
2821         BPF_STMT(BPF_RET | BPF_K, 0),
2822         /* return ~0 == "keep all" */
2823         BPF_STMT(BPF_RET | BPF_K, ~0),
2824 };
2825
2826 static struct sock_fprog msock_filter = {
2827         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2828         .filter = msock_filter_insns,
2829 };
2830
2831
2832 static int add_monitor_filter(int s)
2833 {
2834         int idx;
2835
2836         /* rewrite all PASS/FAIL jump offsets */
2837         for (idx = 0; idx < msock_filter.len; idx++) {
2838                 struct sock_filter *insn = &msock_filter_insns[idx];
2839
2840                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2841                         if (insn->code == (BPF_JMP|BPF_JA)) {
2842                                 if (insn->k == PASS)
2843                                         insn->k = msock_filter.len - idx - 2;
2844                                 else if (insn->k == FAIL)
2845                                         insn->k = msock_filter.len - idx - 3;
2846                         }
2847
2848                         if (insn->jt == PASS)
2849                                 insn->jt = msock_filter.len - idx - 2;
2850                         else if (insn->jt == FAIL)
2851                                 insn->jt = msock_filter.len - idx - 3;
2852
2853                         if (insn->jf == PASS)
2854                                 insn->jf = msock_filter.len - idx - 2;
2855                         else if (insn->jf == FAIL)
2856                                 insn->jf = msock_filter.len - idx - 3;
2857                 }
2858         }
2859
2860         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2861                        &msock_filter, sizeof(msock_filter))) {
2862                 perror("SO_ATTACH_FILTER");
2863                 return -1;
2864         }
2865
2866         return 0;
2867 }
2868
2869
2870 static void nl80211_remove_monitor_interface(
2871         struct wpa_driver_nl80211_data *drv)
2872 {
2873         if (drv->monitor_ifidx >= 0) {
2874                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2875                 drv->monitor_ifidx = -1;
2876         }
2877 }
2878
2879
2880 static int
2881 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2882 {
2883         char buf[IFNAMSIZ];
2884         struct sockaddr_ll ll;
2885         int optval;
2886         socklen_t optlen;
2887
2888         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2889         buf[IFNAMSIZ - 1] = '\0';
2890
2891         drv->monitor_ifidx =
2892                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2893
2894         if (drv->monitor_ifidx < 0)
2895                 return -1;
2896
2897         if (hostapd_set_iface_flags(drv, buf, 1))
2898                 goto error;
2899
2900         memset(&ll, 0, sizeof(ll));
2901         ll.sll_family = AF_PACKET;
2902         ll.sll_ifindex = drv->monitor_ifidx;
2903         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2904         if (drv->monitor_sock < 0) {
2905                 perror("socket[PF_PACKET,SOCK_RAW]");
2906                 goto error;
2907         }
2908
2909         if (add_monitor_filter(drv->monitor_sock)) {
2910                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2911                            "interface; do filtering in user space");
2912                 /* This works, but will cost in performance. */
2913         }
2914
2915         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2916                 perror("monitor socket bind");
2917                 goto error;
2918         }
2919
2920         optlen = sizeof(optval);
2921         optval = 20;
2922         if (setsockopt
2923             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2924                 perror("Failed to set socket priority");
2925                 goto error;
2926         }
2927
2928         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2929                                      drv, NULL)) {
2930                 printf("Could not register monitor read socket\n");
2931                 goto error;
2932         }
2933
2934         return 0;
2935  error:
2936         nl80211_remove_monitor_interface(drv);
2937         return -1;
2938 }
2939
2940
2941 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2942
2943 static int wpa_driver_nl80211_hapd_send_eapol(
2944         void *priv, const u8 *addr, const u8 *data,
2945         size_t data_len, int encrypt, const u8 *own_addr)
2946 {
2947         struct wpa_driver_nl80211_data *drv = priv;
2948         struct ieee80211_hdr *hdr;
2949         size_t len;
2950         u8 *pos;
2951         int res;
2952 #if 0 /* FIX */
2953         int qos = sta->flags & WLAN_STA_WME;
2954 #else
2955         int qos = 0;
2956 #endif
2957
2958         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
2959                 data_len;
2960         hdr = os_zalloc(len);
2961         if (hdr == NULL) {
2962                 printf("malloc() failed for i802_send_data(len=%lu)\n",
2963                        (unsigned long) len);
2964                 return -1;
2965         }
2966
2967         hdr->frame_control =
2968                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
2969         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
2970         if (encrypt)
2971                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
2972 #if 0 /* To be enabled if qos determination is added above */
2973         if (qos) {
2974                 hdr->frame_control |=
2975                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
2976         }
2977 #endif
2978
2979         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
2980         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
2981         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
2982         pos = (u8 *) (hdr + 1);
2983
2984 #if 0 /* To be enabled if qos determination is added above */
2985         if (qos) {
2986                 /* add an empty QoS header if needed */
2987                 pos[0] = 0;
2988                 pos[1] = 0;
2989                 pos += 2;
2990         }
2991 #endif
2992
2993         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
2994         pos += sizeof(rfc1042_header);
2995         WPA_PUT_BE16(pos, ETH_P_PAE);
2996         pos += 2;
2997         memcpy(pos, data, data_len);
2998
2999         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3000         if (res < 0) {
3001                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3002                            "failed: %d (%s)",
3003                            (unsigned long) len, errno, strerror(errno));
3004         }
3005         free(hdr);
3006
3007         return res;
3008 }
3009
3010
3011 static u32 sta_flags_nl80211(int flags)
3012 {
3013         u32 f = 0;
3014
3015         if (flags & WLAN_STA_AUTHORIZED)
3016                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3017         if (flags & WLAN_STA_WMM)
3018                 f |= BIT(NL80211_STA_FLAG_WME);
3019         if (flags & WLAN_STA_SHORT_PREAMBLE)
3020                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3021         if (flags & WLAN_STA_MFP)
3022                 f |= BIT(NL80211_STA_FLAG_MFP);
3023
3024         return f;
3025 }
3026
3027
3028 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3029                                             int total_flags, int flags_or,
3030                                             int flags_and)
3031 {
3032         struct wpa_driver_nl80211_data *drv = priv;
3033         struct nl_msg *msg, *flags = NULL;
3034         struct nl80211_sta_flag_update upd;
3035
3036         msg = nlmsg_alloc();
3037         if (!msg)
3038                 return -ENOMEM;
3039
3040         flags = nlmsg_alloc();
3041         if (!flags) {
3042                 nlmsg_free(msg);
3043                 return -ENOMEM;
3044         }
3045
3046         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3047                     0, NL80211_CMD_SET_STATION, 0);
3048
3049         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3050                     if_nametoindex(drv->ifname));
3051         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3052
3053         /*
3054          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3055          * can be removed eventually.
3056          */
3057         if (total_flags & WLAN_STA_AUTHORIZED)
3058                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3059
3060         if (total_flags & WLAN_STA_WMM)
3061                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3062
3063         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3064                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3065
3066         if (total_flags & WLAN_STA_MFP)
3067                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3068
3069         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3070                 goto nla_put_failure;
3071
3072         os_memset(&upd, 0, sizeof(upd));
3073         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3074         upd.set = sta_flags_nl80211(flags_or);
3075         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3076
3077         nlmsg_free(flags);
3078
3079         return send_and_recv_msgs(drv, msg, NULL, NULL);
3080  nla_put_failure:
3081         nlmsg_free(flags);
3082         return -ENOBUFS;
3083 }
3084
3085 #endif /* CONFIG_AP || HOSTAPD */
3086
3087 #ifdef CONFIG_AP
3088
3089 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3090                                  struct wpa_driver_associate_params *params)
3091 {
3092         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3093             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3094                 nl80211_remove_monitor_interface(drv);
3095                 return -1;
3096         }
3097
3098         /* TODO: setup monitor interface (and add code somewhere to remove this
3099          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3100
3101         return 0;
3102 }
3103 #endif /* CONFIG_AP */
3104
3105
3106 #ifndef HOSTAPD
3107 static int wpa_driver_nl80211_associate(
3108         void *priv, struct wpa_driver_associate_params *params)
3109 {
3110         struct wpa_driver_nl80211_data *drv = priv;
3111         int ret = -1;
3112         struct nl_msg *msg;
3113
3114 #ifdef CONFIG_AP
3115         if (params->mode == 2)
3116                 return wpa_driver_nl80211_ap(drv, params);
3117 #endif /* CONFIG_AP */
3118
3119 #ifndef NO_WEXT
3120         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
3121                                           params->drop_unencrypted);
3122 #endif /* NO_WEXT */
3123
3124         drv->associated = 0;
3125
3126         msg = nlmsg_alloc();
3127         if (!msg)
3128                 return -1;
3129
3130         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3131                    drv->ifindex);
3132         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3133                     NL80211_CMD_ASSOCIATE, 0);
3134
3135         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3136         if (params->bssid) {
3137                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3138                            MAC2STR(params->bssid));
3139                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3140         }
3141         if (params->freq) {
3142                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3143                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3144         }
3145         if (params->ssid) {
3146                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3147                                   params->ssid, params->ssid_len);
3148                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3149                         params->ssid);
3150                 if (params->ssid_len > sizeof(drv->ssid))
3151                         goto nla_put_failure;
3152                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3153                 drv->ssid_len = params->ssid_len;
3154         }
3155         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3156         if (params->wpa_ie)
3157                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3158                         params->wpa_ie);
3159
3160 #ifdef CONFIG_IEEE80211W
3161         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3162                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3163 #endif /* CONFIG_IEEE80211W */
3164
3165         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3166
3167         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3168         msg = NULL;
3169         if (ret) {
3170                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3171                            "(%s)", ret, strerror(-ret));
3172                 goto nla_put_failure;
3173         }
3174         ret = 0;
3175         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3176                    "successfully");
3177
3178 nla_put_failure:
3179         nlmsg_free(msg);
3180         return ret;
3181 }
3182 #endif /* HOSTAPD */
3183
3184
3185 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3186                             int ifindex, int mode)
3187 {
3188         struct nl_msg *msg;
3189         int ret = -ENOBUFS;
3190
3191         msg = nlmsg_alloc();
3192         if (!msg)
3193                 return -ENOMEM;
3194
3195         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3196                     0, NL80211_CMD_SET_INTERFACE, 0);
3197         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3198         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3199
3200         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3201         if (!ret)
3202                 return 0;
3203 nla_put_failure:
3204         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3205                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3206         return ret;
3207 }
3208
3209
3210 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3211 {
3212         struct wpa_driver_nl80211_data *drv = priv;
3213         int ret = -1;
3214         int nlmode;
3215
3216         switch (mode) {
3217         case 0:
3218                 nlmode = NL80211_IFTYPE_STATION;
3219                 break;
3220         case 1:
3221                 nlmode = NL80211_IFTYPE_ADHOC;
3222                 break;
3223         case 2:
3224                 nlmode = NL80211_IFTYPE_AP;
3225                 break;
3226         default:
3227                 return -1;
3228         }
3229
3230         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3231                 drv->nlmode = nlmode;
3232                 ret = 0;
3233                 goto done;
3234         }
3235
3236         if (nlmode == drv->nlmode) {
3237                 ret = 0;
3238                 goto done; /* Already in the requested mode */
3239         }
3240
3241         /* mac80211 doesn't allow mode changes while the device is up, so
3242          * take the device down, try to set the mode again, and bring the
3243          * device back up.
3244          */
3245         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3246                 /* Try to set the mode again while the interface is down */
3247                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3248                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3249                         ret = -1;
3250         }
3251
3252         if (!ret)
3253                 drv->nlmode = nlmode;
3254
3255 done:
3256 #if defined(CONFIG_AP) || defined(HOSTAPD)
3257         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3258                 /* Setup additional AP mode functionality if needed */
3259                 if (drv->monitor_ifidx < 0 &&
3260                     nl80211_create_monitor_interface(drv))
3261                         return -1;
3262         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3263                 /* Remove additional AP mode functionality */
3264                 nl80211_remove_monitor_interface(drv);
3265         }
3266 #endif /* CONFIG_AP || HOSTAPD */
3267
3268         return ret;
3269 }
3270
3271
3272 #ifndef HOSTAPD
3273
3274 static int wpa_driver_nl80211_get_capa(void *priv,
3275                                        struct wpa_driver_capa *capa)
3276 {
3277         struct wpa_driver_nl80211_data *drv = priv;
3278         if (!drv->has_capability)
3279                 return -1;
3280         os_memcpy(capa, &drv->capa, sizeof(*capa));
3281         return 0;
3282 }
3283
3284
3285 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3286 {
3287         struct wpa_driver_nl80211_data *drv = priv;
3288
3289         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3290                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3291         drv->operstate = state;
3292         return wpa_driver_nl80211_send_oper_ifla(
3293                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3294 }
3295
3296
3297 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3298 {
3299         struct wpa_driver_nl80211_data *drv = priv;
3300         struct nl_msg *msg;
3301         struct nl80211_sta_flag_update upd;
3302
3303         msg = nlmsg_alloc();
3304         if (!msg)
3305                 return -ENOMEM;
3306
3307         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3308                     0, NL80211_CMD_SET_STATION, 0);
3309
3310         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3311                     if_nametoindex(drv->ifname));
3312         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3313
3314         os_memset(&upd, 0, sizeof(upd));
3315         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3316         if (authorized)
3317                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3318         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3319
3320         return send_and_recv_msgs(drv, msg, NULL, NULL);
3321  nla_put_failure:
3322         return -ENOBUFS;
3323 }
3324
3325 #endif /* HOSTAPD */
3326
3327
3328 #ifdef HOSTAPD
3329
3330 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3331                                  int ifindex)
3332 {
3333         struct i802_bss *bss = &drv->bss;
3334         while (bss) {
3335                 if (ifindex == bss->ifindex)
3336                         return bss;
3337                 bss = bss->next;
3338         }
3339         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3340         return NULL;
3341 }
3342
3343
3344 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3345 {
3346         int i;
3347         int *old;
3348
3349         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3350                    ifidx);
3351         for (i = 0; i < drv->num_if_indices; i++) {
3352                 if (drv->if_indices[i] == 0) {
3353                         drv->if_indices[i] = ifidx;
3354                         return;
3355                 }
3356         }
3357
3358         if (drv->if_indices != drv->default_if_indices)
3359                 old = drv->if_indices;
3360         else
3361                 old = NULL;
3362
3363         drv->if_indices = realloc(old,
3364                                   sizeof(int) * (drv->num_if_indices + 1));
3365         if (!drv->if_indices) {
3366                 if (!old)
3367                         drv->if_indices = drv->default_if_indices;
3368                 else
3369                         drv->if_indices = old;
3370                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3371                            "interfaces");
3372                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3373                 return;
3374         }
3375         drv->if_indices[drv->num_if_indices] = ifidx;
3376         drv->num_if_indices++;
3377 }
3378
3379
3380 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3381 {
3382         int i;
3383
3384         for (i = 0; i < drv->num_if_indices; i++) {
3385                 if (drv->if_indices[i] == ifidx) {
3386                         drv->if_indices[i] = 0;
3387                         break;
3388                 }
3389         }
3390 }
3391
3392
3393 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3394 {
3395         int i;
3396
3397         for (i = 0; i < drv->num_if_indices; i++)
3398                 if (drv->if_indices[i] == ifidx)
3399                         return 1;
3400
3401         return 0;
3402 }
3403
3404
3405 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3406                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3407                         size_t seq_len, const u8 *key, size_t key_len)
3408 {
3409         struct wpa_driver_nl80211_data *drv = priv;
3410         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3411                            set_tx, seq, seq_len, key, key_len);
3412 }
3413
3414
3415 static inline int min_int(int a, int b)
3416 {
3417         if (a < b)
3418                 return a;
3419         return b;
3420 }
3421
3422
3423 static int get_key_handler(struct nl_msg *msg, void *arg)
3424 {
3425         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3426         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3427
3428         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3429                   genlmsg_attrlen(gnlh, 0), NULL);
3430
3431         /*
3432          * TODO: validate the key index and mac address!
3433          * Otherwise, there's a race condition as soon as
3434          * the kernel starts sending key notifications.
3435          */
3436
3437         if (tb[NL80211_ATTR_KEY_SEQ])
3438                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3439                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3440         return NL_SKIP;
3441 }
3442
3443
3444 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3445                            int idx, u8 *seq)
3446 {
3447         struct wpa_driver_nl80211_data *drv = priv;
3448         struct nl_msg *msg;
3449
3450         msg = nlmsg_alloc();
3451         if (!msg)
3452                 return -ENOMEM;
3453
3454         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3455                     0, NL80211_CMD_GET_KEY, 0);
3456
3457         if (addr)
3458                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3459         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3460         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3461
3462         memset(seq, 0, 6);
3463
3464         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3465  nla_put_failure:
3466         return -ENOBUFS;
3467 }
3468
3469
3470 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3471                               int mode)
3472 {
3473         struct wpa_driver_nl80211_data *drv = priv;
3474         struct nl_msg *msg;
3475         u8 rates[NL80211_MAX_SUPP_RATES];
3476         u8 rates_len = 0;
3477         int i;
3478
3479         msg = nlmsg_alloc();
3480         if (!msg)
3481                 return -ENOMEM;
3482
3483         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3484                     NL80211_CMD_SET_BSS, 0);
3485
3486         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3487                 rates[rates_len++] = basic_rates[i] / 5;
3488
3489         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3490
3491         /* TODO: multi-BSS support */
3492         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3493
3494         return send_and_recv_msgs(drv, msg, NULL, NULL);
3495  nla_put_failure:
3496         return -ENOBUFS;
3497 }
3498
3499
3500 /* Set kernel driver on given frequency (MHz) */
3501 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3502 {
3503         struct wpa_driver_nl80211_data *drv = priv;
3504         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3505                                            freq->sec_channel_offset);
3506 }
3507
3508
3509 static int i802_set_rts(void *priv, int rts)
3510 {
3511         struct wpa_driver_nl80211_data *drv = priv;
3512         struct nl_msg *msg;
3513         int ret = -ENOBUFS;
3514         u32 val;
3515
3516         msg = nlmsg_alloc();
3517         if (!msg)
3518                 return -ENOMEM;
3519
3520         if (rts >= 2347)
3521                 val = (u32) -1;
3522         else
3523                 val = rts;
3524
3525         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3526                     0, NL80211_CMD_SET_WIPHY, 0);
3527         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3528         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3529
3530         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3531         if (!ret)
3532                 return 0;
3533 nla_put_failure:
3534         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3535                    "%d (%s)", rts, ret, strerror(-ret));
3536         return ret;
3537 }
3538
3539
3540 static int i802_set_frag(void *priv, int frag)
3541 {
3542         struct wpa_driver_nl80211_data *drv = priv;
3543         struct nl_msg *msg;
3544         int ret = -ENOBUFS;
3545         u32 val;
3546
3547         msg = nlmsg_alloc();
3548         if (!msg)
3549                 return -ENOMEM;
3550
3551         if (frag >= 2346)
3552                 val = (u32) -1;
3553         else
3554                 val = frag;
3555
3556         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3557                     0, NL80211_CMD_SET_WIPHY, 0);
3558         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3559         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3560
3561         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3562         if (!ret)
3563                 return 0;
3564 nla_put_failure:
3565         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3566                    "%d: %d (%s)", frag, ret, strerror(-ret));
3567         return ret;
3568 }
3569
3570
3571 static int i802_flush(void *priv)
3572 {
3573         struct wpa_driver_nl80211_data *drv = priv;
3574         struct nl_msg *msg;
3575
3576         msg = nlmsg_alloc();
3577         if (!msg)
3578                 return -1;
3579
3580         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3581                     0, NL80211_CMD_DEL_STATION, 0);
3582
3583         /*
3584          * XXX: FIX! this needs to flush all VLANs too
3585          */
3586         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3587                     if_nametoindex(drv->ifname));
3588
3589         return send_and_recv_msgs(drv, msg, NULL, NULL);
3590  nla_put_failure:
3591         return -ENOBUFS;
3592 }
3593
3594
3595 static int get_sta_handler(struct nl_msg *msg, void *arg)
3596 {
3597         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3598         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3599         struct hostap_sta_driver_data *data = arg;
3600         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3601         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3602                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3603                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3604                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3605                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3606                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3607         };
3608
3609         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3610                   genlmsg_attrlen(gnlh, 0), NULL);
3611
3612         /*
3613          * TODO: validate the interface and mac address!
3614          * Otherwise, there's a race condition as soon as
3615          * the kernel starts sending station notifications.
3616          */
3617
3618         if (!tb[NL80211_ATTR_STA_INFO]) {
3619                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3620                 return NL_SKIP;
3621         }
3622         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3623                              tb[NL80211_ATTR_STA_INFO],
3624                              stats_policy)) {
3625                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3626                 return NL_SKIP;
3627         }
3628
3629         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3630                 data->inactive_msec =
3631                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3632         if (stats[NL80211_STA_INFO_RX_BYTES])
3633                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3634         if (stats[NL80211_STA_INFO_TX_BYTES])
3635                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3636         if (stats[NL80211_STA_INFO_RX_PACKETS])
3637                 data->rx_packets =
3638                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3639         if (stats[NL80211_STA_INFO_TX_PACKETS])
3640                 data->tx_packets =
3641                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3642
3643         return NL_SKIP;
3644 }
3645
3646 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3647                               const u8 *addr)
3648 {
3649         struct wpa_driver_nl80211_data *drv = priv;
3650         struct nl_msg *msg;
3651
3652         os_memset(data, 0, sizeof(*data));
3653         msg = nlmsg_alloc();
3654         if (!msg)
3655                 return -ENOMEM;
3656
3657         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3658                     0, NL80211_CMD_GET_STATION, 0);
3659
3660         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3661         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3662
3663         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3664  nla_put_failure:
3665         return -ENOBUFS;
3666 }
3667
3668
3669 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3670                                     int cw_min, int cw_max, int burst_time)
3671 {
3672         struct wpa_driver_nl80211_data *drv = priv;
3673         struct nl_msg *msg;
3674         struct nlattr *txq, *params;
3675
3676         msg = nlmsg_alloc();
3677         if (!msg)
3678                 return -1;
3679
3680         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3681                     0, NL80211_CMD_SET_WIPHY, 0);
3682
3683         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3684
3685         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3686         if (!txq)
3687                 goto nla_put_failure;
3688
3689         /* We are only sending parameters for a single TXQ at a time */
3690         params = nla_nest_start(msg, 1);
3691         if (!params)
3692                 goto nla_put_failure;
3693
3694         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3695         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3696          * 32 usec, so need to convert the value here. */
3697         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3698         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3699         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3700         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3701
3702         nla_nest_end(msg, params);
3703
3704         nla_nest_end(msg, txq);
3705
3706         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3707                 return 0;
3708  nla_put_failure:
3709         return -1;
3710 }
3711
3712
3713 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3714 {
3715         struct wpa_driver_nl80211_data *drv = priv;
3716         int ifidx;
3717         struct i802_bss *bss;
3718
3719         bss = os_zalloc(sizeof(*bss));
3720         if (bss == NULL)
3721                 return -1;
3722
3723         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3724         if (ifidx < 0) {
3725                 os_free(bss);
3726                 return -1;
3727         }
3728         bss->ifindex = ifidx;
3729         if (hostapd_set_iface_flags(priv, ifname, 1)) {
3730                 nl80211_remove_iface(priv, ifidx);
3731                 os_free(bss);
3732                 return -1;
3733         }
3734         bss->next = drv->bss.next;
3735         drv->bss.next = bss;
3736         return 0;
3737 }
3738
3739
3740 static int i802_bss_remove(void *priv, const char *ifname)
3741 {
3742         struct wpa_driver_nl80211_data *drv = priv;
3743         struct i802_bss *bss, *prev;
3744         int ifindex = if_nametoindex(ifname);
3745         nl80211_remove_iface(priv, ifindex);
3746         prev = &drv->bss;
3747         bss = drv->bss.next;
3748         while (bss) {
3749                 if (ifindex == bss->ifindex) {
3750                         prev->next = bss->next;
3751                         os_free(bss);
3752                         break;
3753                 }
3754                 prev = bss;
3755                 bss = bss->next;
3756         }
3757         return 0;
3758 }
3759
3760
3761 static int i802_set_beacon(const char *iface, void *priv,
3762                            const u8 *head, size_t head_len,
3763                            const u8 *tail, size_t tail_len, int dtim_period)
3764 {
3765         return wpa_driver_nl80211_set_beacon_iface(if_nametoindex(iface), priv,
3766                                                    head, head_len,
3767                                                    tail, tail_len,
3768                                                    dtim_period);
3769 }
3770
3771
3772 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3773 {
3774         struct wpa_driver_nl80211_data *drv = priv;
3775         struct nl_msg *msg;
3776
3777         msg = nlmsg_alloc();
3778         if (!msg)
3779                 return -ENOMEM;
3780
3781         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3782                     NL80211_CMD_SET_BSS, 0);
3783
3784         if (cts >= 0)
3785                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3786         if (preamble >= 0)
3787                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3788         if (slot >= 0)
3789                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3790
3791         /* TODO: multi-BSS support */
3792         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3793
3794         return send_and_recv_msgs(drv, msg, NULL, NULL);
3795  nla_put_failure:
3796         return -ENOBUFS;
3797 }
3798
3799
3800 static int i802_set_cts_protect(void *priv, int value)
3801 {
3802         return i802_set_bss(priv, value, -1, -1);
3803 }
3804
3805
3806 static int i802_set_preamble(void *priv, int value)
3807 {
3808         return i802_set_bss(priv, -1, value, -1);
3809 }
3810
3811
3812 static int i802_set_short_slot_time(void *priv, int value)
3813 {
3814         return i802_set_bss(priv, -1, -1, value);
3815 }
3816
3817
3818 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3819 {
3820         switch (type) {
3821         case HOSTAPD_IF_VLAN:
3822                 return NL80211_IFTYPE_AP_VLAN;
3823         }
3824         return -1;
3825 }
3826
3827
3828 static int i802_if_add(const char *iface, void *priv,
3829                        enum hostapd_driver_if_type type, char *ifname,
3830                        const u8 *addr)
3831 {
3832         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3833                 return -1;
3834         return 0;
3835 }
3836
3837
3838 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3839                           char *ifname, const u8 *addr)
3840 {
3841         /* unused at the moment */
3842         return -1;
3843 }
3844
3845
3846 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3847                           const char *ifname, const u8 *addr)
3848 {
3849         nl80211_remove_iface(priv, if_nametoindex(ifname));
3850         return 0;
3851 }
3852
3853
3854 static int i802_set_sta_vlan(void *priv, const u8 *addr,
3855                              const char *ifname, int vlan_id)
3856 {
3857         struct wpa_driver_nl80211_data *drv = priv;
3858         struct nl_msg *msg;
3859
3860         msg = nlmsg_alloc();
3861         if (!msg)
3862                 return -ENOMEM;
3863
3864         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3865                     0, NL80211_CMD_SET_STATION, 0);
3866
3867         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3868                     if_nametoindex(drv->ifname));
3869         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3870         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3871                     if_nametoindex(ifname));
3872
3873         return send_and_recv_msgs(drv, msg, NULL, NULL);
3874  nla_put_failure:
3875         return -ENOBUFS;
3876 }
3877
3878
3879 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
3880 {
3881         struct wpa_driver_nl80211_data *drv = eloop_ctx;
3882         struct sockaddr_ll lladdr;
3883         unsigned char buf[3000];
3884         int len;
3885         socklen_t fromlen = sizeof(lladdr);
3886
3887         len = recvfrom(sock, buf, sizeof(buf), 0,
3888                        (struct sockaddr *)&lladdr, &fromlen);
3889         if (len < 0) {
3890                 perror("recv");
3891                 return;
3892         }
3893
3894         if (have_ifidx(drv, lladdr.sll_ifindex)) {
3895                 void *ctx;
3896                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
3897                 if (!ctx)
3898                         return;
3899                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
3900         }
3901 }
3902
3903
3904 static int i802_get_inact_sec(void *priv, const u8 *addr)
3905 {
3906         struct hostap_sta_driver_data data;
3907         int ret;
3908
3909         data.inactive_msec = (unsigned long) -1;
3910         ret = i802_read_sta_data(priv, &data, addr);
3911         if (ret || data.inactive_msec == (unsigned long) -1)
3912                 return -1;
3913         return data.inactive_msec / 1000;
3914 }
3915
3916
3917 static int i802_sta_clear_stats(void *priv, const u8 *addr)
3918 {
3919 #if 0
3920         /* TODO */
3921 #endif
3922         return 0;
3923 }
3924
3925
3926 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
3927                            int reason)
3928 {
3929         struct wpa_driver_nl80211_data *drv = priv;
3930         struct ieee80211_mgmt mgmt;
3931
3932         memset(&mgmt, 0, sizeof(mgmt));
3933         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3934                                           WLAN_FC_STYPE_DEAUTH);
3935         memcpy(mgmt.da, addr, ETH_ALEN);
3936         memcpy(mgmt.sa, own_addr, ETH_ALEN);
3937         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
3938         mgmt.u.deauth.reason_code = host_to_le16(reason);
3939         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3940                                             IEEE80211_HDRLEN +
3941                                             sizeof(mgmt.u.deauth));
3942 }
3943
3944
3945 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
3946                              int reason)
3947 {
3948         struct wpa_driver_nl80211_data *drv = priv;
3949         struct ieee80211_mgmt mgmt;
3950
3951         memset(&mgmt, 0, sizeof(mgmt));
3952         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
3953                                           WLAN_FC_STYPE_DISASSOC);
3954         memcpy(mgmt.da, addr, ETH_ALEN);
3955         memcpy(mgmt.sa, own_addr, ETH_ALEN);
3956         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
3957         mgmt.u.disassoc.reason_code = host_to_le16(reason);
3958         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
3959                                             IEEE80211_HDRLEN +
3960                                             sizeof(mgmt.u.disassoc));
3961 }
3962
3963
3964 static void *i802_init(struct hostapd_data *hapd,
3965                        struct wpa_init_params *params)
3966 {
3967         struct wpa_driver_nl80211_data *drv;
3968         size_t i;
3969
3970         drv = wpa_driver_nl80211_init(hapd, params->ifname);
3971         if (drv == NULL)
3972                 return NULL;
3973
3974         drv->bss.ifindex = drv->ifindex;
3975
3976         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
3977         drv->if_indices = drv->default_if_indices;
3978         for (i = 0; i < params->num_bridge; i++) {
3979                 if (params->bridge[i])
3980                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
3981         }
3982
3983         /* start listening for EAPOL on the default AP interface */
3984         add_ifidx(drv, drv->ifindex);
3985
3986         if (params->bssid) {
3987                 if (hostapd_set_iface_flags(drv, drv->ifname, 0))
3988                         goto failed;
3989
3990                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
3991                         goto failed;
3992         }
3993
3994         if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
3995                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
3996                            "into AP mode", drv->ifname);
3997                 goto failed;
3998         }
3999
4000         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4001                 goto failed;
4002
4003         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4004         if (drv->eapol_sock < 0) {
4005                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4006                 goto failed;
4007         }
4008
4009         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4010         {
4011                 printf("Could not register read socket for eapol\n");
4012                 goto failed;
4013         }
4014
4015         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4016                 goto failed;
4017
4018         return drv;
4019
4020 failed:
4021         nl80211_remove_monitor_interface(drv);
4022         if (drv->ioctl_sock >= 0)
4023                 close(drv->ioctl_sock);
4024
4025         genl_family_put(drv->nl80211);
4026         nl_cache_free(drv->nl_cache);
4027         nl_handle_destroy(drv->nl_handle);
4028         nl_cb_put(drv->nl_cb);
4029
4030         os_free(drv);
4031         return NULL;
4032 }
4033
4034
4035 static void i802_deinit(void *priv)
4036 {
4037         wpa_driver_nl80211_deinit(priv);
4038 }
4039
4040 #endif /* HOSTAPD */
4041
4042
4043 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4044         .name = "nl80211",
4045         .desc = "Linux nl80211/cfg80211",
4046 #ifndef HOSTAPD
4047         .get_bssid = wpa_driver_nl80211_get_bssid,
4048         .get_ssid = wpa_driver_nl80211_get_ssid,
4049         .set_key = wpa_driver_nl80211_set_key,
4050 #endif /* HOSTAPD */
4051         .scan2 = wpa_driver_nl80211_scan,
4052         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4053 #ifndef HOSTAPD
4054         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4055         .disassociate = wpa_driver_nl80211_disassociate,
4056         .authenticate = wpa_driver_nl80211_authenticate,
4057         .associate = wpa_driver_nl80211_associate,
4058         .init = wpa_driver_nl80211_init,
4059         .deinit = wpa_driver_nl80211_deinit,
4060         .get_capa = wpa_driver_nl80211_get_capa,
4061         .set_operstate = wpa_driver_nl80211_set_operstate,
4062         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4063 #endif /* HOSTAPD */
4064         .set_country = wpa_driver_nl80211_set_country,
4065         .set_mode = wpa_driver_nl80211_set_mode,
4066 #ifdef CONFIG_AP
4067         .set_beacon = wpa_driver_nl80211_set_beacon,
4068 #endif /* CONFIG_AP */
4069 #if defined(CONFIG_AP) || defined(HOSTAPD)
4070         .send_mlme = wpa_driver_nl80211_send_mlme,
4071         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
4072         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4073         .sta_add = wpa_driver_nl80211_sta_add,
4074         .sta_remove = wpa_driver_nl80211_sta_remove,
4075         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4076         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4077 #endif /* CONFIG_AP || HOSTAPD */
4078 #ifdef HOSTAPD
4079         .hapd_init = i802_init,
4080         .hapd_deinit = i802_deinit,
4081         .hapd_set_key = i802_set_key,
4082         .get_seqnum = i802_get_seqnum,
4083         .flush = i802_flush,
4084         .read_sta_data = i802_read_sta_data,
4085         .sta_deauth = i802_sta_deauth,
4086         .sta_disassoc = i802_sta_disassoc,
4087         .get_inact_sec = i802_get_inact_sec,
4088         .sta_clear_stats = i802_sta_clear_stats,
4089         .set_freq = i802_set_freq,
4090         .set_rts = i802_set_rts,
4091         .set_frag = i802_set_frag,
4092         .set_rate_sets = i802_set_rate_sets,
4093         .hapd_set_beacon = i802_set_beacon,
4094         .set_cts_protect = i802_set_cts_protect,
4095         .set_preamble = i802_set_preamble,
4096         .set_short_slot_time = i802_set_short_slot_time,
4097         .set_tx_queue_params = i802_set_tx_queue_params,
4098         .bss_add = i802_bss_add,
4099         .bss_remove = i802_bss_remove,
4100         .if_add = i802_if_add,
4101         .if_update = i802_if_update,
4102         .if_remove = i802_if_remove,
4103         .set_sta_vlan = i802_set_sta_vlan,
4104 #endif /* HOSTAPD */
4105 };