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 <netpacket/packet.h>
  27 #include <linux/filter.h>
  28 #include "nl80211_copy.h"
  29
  30 #include "common.h"
  31 #include "eloop.h"
  32 #include "common/ieee802_11_defs.h"
  33 #include "netlink.h"
  34 #include "radiotap.h"
  35 #include "radiotap_iter.h"
  36 #include "driver.h"
  37
  38 #ifdef CONFIG_LIBNL20
  39 /* libnl 2.0 compatibility code */
  40 #define nl_handle nl_sock
  41 #define nl_handle_alloc_cb nl_socket_alloc_cb
  42 #define nl_handle_destroy nl_socket_free
  43 #endif /* CONFIG_LIBNL20 */
  44
  45
  46 #ifndef IFF_LOWER_UP
  47 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  48 #endif
  49 #ifndef IFF_DORMANT
  50 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  51 #endif
  52
  53 #ifndef IF_OPER_DORMANT
  54 #define IF_OPER_DORMANT 5
  55 #endif
  56 #ifndef IF_OPER_UP
  57 #define IF_OPER_UP 6
  58 #endif
  59
  60 struct i802_bss {
  61         struct i802_bss *next;
  62         int ifindex;
  63         unsigned int beacon_set:1;
  64 };
  65
  66 struct wpa_driver_nl80211_data {
  67         void *ctx;
  68         struct netlink_data *netlink;
  69         int ioctl_sock; /* socket for ioctl() use */
  70         char ifname[IFNAMSIZ + 1];
  71         int ifindex;
  72         int if_removed;
  73         struct wpa_driver_capa capa;
  74         int has_capability;
  75
  76         int operstate;
  77
  78         int scan_complete_events;
  79
  80         struct nl_handle *nl_handle;
  81         struct nl_handle *nl_handle_event;
  82         struct nl_cache *nl_cache;
  83         struct nl_cache *nl_cache_event;
  84         struct nl_cb *nl_cb;
  85         struct genl_family *nl80211;
  86
  87         u8 auth_bssid[ETH_ALEN];
  88         u8 bssid[ETH_ALEN];
  89         int associated;
  90         u8 ssid[32];
  91         size_t ssid_len;
  92         int nlmode;
  93         int ap_scan_as_station;
  94
  95         int monitor_sock;
  96         int monitor_ifidx;
  97
  98         unsigned int beacon_set:1;
  99
 100 #ifdef HOSTAPD
 101         int eapol_sock; /* socket for EAPOL frames */
 102
 103         int default_if_indices[16];
 104         int *if_indices;
 105         int num_if_indices;
 106
 107         struct i802_bss bss;
 108
 109         int last_freq;
 110         int last_freq_ht;
 111 #endif /* HOSTAPD */
 112 };
 113
 114
 115 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 116                                             void *timeout_ctx);
 117 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 118 static int
 119 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 120 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 121                                    const u8 *addr, int cmd, u16 reason_code);
 122 static void nl80211_remove_monitor_interface(
 123         struct wpa_driver_nl80211_data *drv);
 124
 125 #ifdef HOSTAPD
 126 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 127 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 128 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 129                                  int ifindex);
 130 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 131 #endif /* HOSTAPD */
 132
 133
 134 /* nl80211 code */
 135 static int ack_handler(struct nl_msg *msg, void *arg)
 136 {
 137         int *err = arg;
 138         *err = 0;
 139         return NL_STOP;
 140 }
 141
 142 static int finish_handler(struct nl_msg *msg, void *arg)
 143 {
 144         int *ret = arg;
 145         *ret = 0;
 146         return NL_SKIP;
 147 }
 148
 149 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 150                          void *arg)
 151 {
 152         int *ret = arg;
 153         *ret = err->error;
 154         return NL_SKIP;
 155 }
 156
 157
 158 static int no_seq_check(struct nl_msg *msg, void *arg)
 159 {
 160         return NL_OK;
 161 }
 162
 163
 164 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 165                               struct nl_msg *msg,
 166                               int (*valid_handler)(struct nl_msg *, void *),
 167                               void *valid_data)
 168 {
 169         struct nl_cb *cb;
 170         int err = -ENOMEM;
 171
 172         cb = nl_cb_clone(drv->nl_cb);
 173         if (!cb)
 174                 goto out;
 175
 176         err = nl_send_auto_complete(drv->nl_handle, msg);
 177         if (err < 0)
 178                 goto out;
 179
 180         err = 1;
 181
 182         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 183         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 184         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 185
 186         if (valid_handler)
 187                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 188                           valid_handler, valid_data);
 189
 190         while (err > 0)
 191                 nl_recvmsgs(drv->nl_handle, cb);
 192  out:
 193         nl_cb_put(cb);
 194         nlmsg_free(msg);
 195         return err;
 196 }
 197
 198
 199 struct family_data {
 200         const char *group;
 201         int id;
 202 };
 203
 204
 205 static int family_handler(struct nl_msg *msg, void *arg)
 206 {
 207         struct family_data *res = arg;
 208         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 209         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 210         struct nlattr *mcgrp;
 211         int i;
 212
 213         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 214                   genlmsg_attrlen(gnlh, 0), NULL);
 215         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 216                 return NL_SKIP;
 217
 218         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 219                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 220                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 221                           nla_len(mcgrp), NULL);
 222                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 223                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 224                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 225                                res->group,
 226                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 227                         continue;
 228                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 229                 break;
 230         };
 231
 232         return NL_SKIP;
 233 }
 234
 235
 236 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 237                                const char *family, const char *group)
 238 {
 239         struct nl_msg *msg;
 240         int ret = -1;
 241         struct family_data res = { group, -ENOENT };
 242
 243         msg = nlmsg_alloc();
 244         if (!msg)
 245                 return -ENOMEM;
 246         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 247                     0, 0, CTRL_CMD_GETFAMILY, 0);
 248         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 249
 250         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 251         msg = NULL;
 252         if (ret == 0)
 253                 ret = res.id;
 254
 255 nla_put_failure:
 256         nlmsg_free(msg);
 257         return ret;
 258 }
 259
 260
 261 #ifdef HOSTAPD
 262 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 263                         const char *ifname, u8 *addr)
 264 {
 265         struct ifreq ifr;
 266
 267         os_memset(&ifr, 0, sizeof(ifr));
 268         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 269         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 270                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 271                            ifname, errno, strerror(errno));
 272                 return -1;
 273         }
 274
 275         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 276                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 277                            ifname, ifr.ifr_hwaddr.sa_family);
 278                 return -1;
 279         }
 280         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 281
 282         return 0;
 283 }
 284
 285
 286 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 287                         const char *ifname, const u8 *addr)
 288 {
 289         struct ifreq ifr;
 290
 291         os_memset(&ifr, 0, sizeof(ifr));
 292         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 293         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 294         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 295
 296         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 297                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 298                            ifname, errno, strerror(errno));
 299                 return -1;
 300         }
 301
 302         return 0;
 303 }
 304 #endif /* HOSTAPD */
 305
 306
 307 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 308 {
 309         struct wpa_driver_nl80211_data *drv = priv;
 310         if (!drv->associated)
 311                 return -1;
 312         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 313         return 0;
 314 }
 315
 316
 317 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 318 {
 319         struct wpa_driver_nl80211_data *drv = priv;
 320         if (!drv->associated)
 321                 return -1;
 322         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 323         return drv->ssid_len;
 324 }
 325
 326
 327 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 328                                           char *buf, size_t len, int del)
 329 {
 330         union wpa_event_data event;
 331
 332         os_memset(&event, 0, sizeof(event));
 333         if (len > sizeof(event.interface_status.ifname))
 334                 len = sizeof(event.interface_status.ifname) - 1;
 335         os_memcpy(event.interface_status.ifname, buf, len);
 336         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 337                 EVENT_INTERFACE_ADDED;
 338
 339         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 340                    del ? "DEL" : "NEW",
 341                    event.interface_status.ifname,
 342                    del ? "removed" : "added");
 343
 344         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 345                 if (del)
 346                         drv->if_removed = 1;
 347                 else
 348                         drv->if_removed = 0;
 349         }
 350
 351         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 352 }
 353
 354
 355 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 356                                          u8 *buf, size_t len)
 357 {
 358         int attrlen, rta_len;
 359         struct rtattr *attr;
 360
 361         attrlen = len;
 362         attr = (struct rtattr *) buf;
 363
 364         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 365         while (RTA_OK(attr, attrlen)) {
 366                 if (attr->rta_type == IFLA_IFNAME) {
 367                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 368                             == 0)
 369                                 return 1;
 370                         else
 371                                 break;
 372                 }
 373                 attr = RTA_NEXT(attr, attrlen);
 374         }
 375
 376         return 0;
 377 }
 378
 379
 380 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 381                                           int ifindex, u8 *buf, size_t len)
 382 {
 383         if (drv->ifindex == ifindex)
 384                 return 1;
 385
 386         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 387                 drv->ifindex = if_nametoindex(drv->ifname);
 388                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 389                            "interface");
 390                 wpa_driver_nl80211_finish_drv_init(drv);
 391                 return 1;
 392         }
 393
 394         return 0;
 395 }
 396
 397
 398 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
 399                                                  struct ifinfomsg *ifi,
 400                                                  u8 *buf, size_t len)
 401 {
 402         struct wpa_driver_nl80211_data *drv = ctx;
 403         int attrlen, rta_len;
 404         struct rtattr *attr;
 405
 406         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len)) {
 407                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 408                            ifi->ifi_index);
 409                 return;
 410         }
 411
 412         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 413                    "(%s%s%s%s)",
 414                    drv->operstate, ifi->ifi_flags,
 415                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 416                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 417                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 418                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 419         /*
 420          * Some drivers send the association event before the operup event--in
 421          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 422          * fails. This will hit us when wpa_supplicant does not need to do
 423          * IEEE 802.1X authentication
 424          */
 425         if (drv->operstate == 1 &&
 426             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 427             !(ifi->ifi_flags & IFF_RUNNING))
 428                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 429                                        -1, IF_OPER_UP);
 430
 431         attrlen = len;
 432         attr = (struct rtattr *) buf;
 433         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 434         while (RTA_OK(attr, attrlen)) {
 435                 if (attr->rta_type == IFLA_IFNAME) {
 436                         wpa_driver_nl80211_event_link(
 437                                 drv,
 438                                 ((char *) attr) + rta_len,
 439                                 attr->rta_len - rta_len, 0);
 440                 }
 441                 attr = RTA_NEXT(attr, attrlen);
 442         }
 443 }
 444
 445
 446 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
 447                                                  struct ifinfomsg *ifi,
 448                                                  u8 *buf, size_t len)
 449 {
 450         struct wpa_driver_nl80211_data *drv = ctx;
 451         int attrlen, rta_len;
 452         struct rtattr *attr;
 453
 454         attrlen = len;
 455         attr = (struct rtattr *) buf;
 456
 457         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 458         while (RTA_OK(attr, attrlen)) {
 459                 if (attr->rta_type == IFLA_IFNAME) {
 460                         wpa_driver_nl80211_event_link(
 461                                 drv,
 462                                 ((char *) attr) + rta_len,
 463                                 attr->rta_len - rta_len, 1);
 464                 }
 465                 attr = RTA_NEXT(attr, attrlen);
 466         }
 467 }
 468
 469
 470 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 471                             const u8 *frame, size_t len)
 472 {
 473         const struct ieee80211_mgmt *mgmt;
 474         union wpa_event_data event;
 475
 476         mgmt = (const struct ieee80211_mgmt *) frame;
 477         if (len < 24 + sizeof(mgmt->u.auth)) {
 478                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 479                            "frame");
 480                 return;
 481         }
 482
 483         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 484         os_memset(&event, 0, sizeof(event));
 485         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 486         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 487         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 488         if (len > 24 + sizeof(mgmt->u.auth)) {
 489                 event.auth.ies = mgmt->u.auth.variable;
 490                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 491         }
 492
 493         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 494 }
 495
 496
 497 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 498                             const u8 *frame, size_t len)
 499 {
 500         const struct ieee80211_mgmt *mgmt;
 501         union wpa_event_data event;
 502         u16 status;
 503
 504         mgmt = (const struct ieee80211_mgmt *) frame;
 505         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 506                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 507                            "frame");
 508                 return;
 509         }
 510
 511         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 512         if (status != WLAN_STATUS_SUCCESS) {
 513                 os_memset(&event, 0, sizeof(event));
 514                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 515                         event.assoc_reject.resp_ies =
 516                                 (u8 *) mgmt->u.assoc_resp.variable;
 517                         event.assoc_reject.resp_ies_len =
 518                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 519                 }
 520                 event.assoc_reject.status_code = status;
 521
 522                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 523                 return;
 524         }
 525
 526         drv->associated = 1;
 527         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 528
 529         os_memset(&event, 0, sizeof(event));
 530         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 531                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 532                 event.assoc_info.resp_ies_len =
 533                         len - 24 - sizeof(mgmt->u.assoc_resp);
 534         }
 535
 536         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 537 }
 538
 539
 540 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 541                                enum nl80211_commands cmd, struct nlattr *status,
 542                                struct nlattr *addr, struct nlattr *req_ie,
 543                                struct nlattr *resp_ie)
 544 {
 545         union wpa_event_data event;
 546
 547         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 548                 /*
 549                  * Avoid reporting two association events that would confuse
 550                  * the core code.
 551                  */
 552                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 553                            "when using userspace SME", cmd);
 554                 return;
 555         }
 556
 557         os_memset(&event, 0, sizeof(event));
 558         if (cmd == NL80211_CMD_CONNECT &&
 559             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 560                 if (resp_ie) {
 561                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 562                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 563                 }
 564                 event.assoc_reject.status_code = nla_get_u16(status);
 565                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 566                 return;
 567         }
 568
 569         drv->associated = 1;
 570         if (addr)
 571                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 572
 573         if (req_ie) {
 574                 event.assoc_info.req_ies = nla_data(req_ie);
 575                 event.assoc_info.req_ies_len = nla_len(req_ie);
 576         }
 577         if (resp_ie) {
 578                 event.assoc_info.resp_ies = nla_data(resp_ie);
 579                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 580         }
 581
 582         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 583 }
 584
 585
 586 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 587                                enum nl80211_commands cmd, struct nlattr *addr)
 588 {
 589         union wpa_event_data event;
 590         enum wpa_event_type ev;
 591
 592         if (nla_len(addr) != ETH_ALEN)
 593                 return;
 594
 595         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 596                    cmd, MAC2STR((u8 *) nla_data(addr)));
 597
 598         if (cmd == NL80211_CMD_AUTHENTICATE)
 599                 ev = EVENT_AUTH_TIMED_OUT;
 600         else if (cmd == NL80211_CMD_ASSOCIATE)
 601                 ev = EVENT_ASSOC_TIMED_OUT;
 602         else
 603                 return;
 604
 605         os_memset(&event, 0, sizeof(event));
 606         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 607         wpa_supplicant_event(drv->ctx, ev, &event);
 608 }
 609
 610
 611 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 612                        enum nl80211_commands cmd, struct nlattr *frame,
 613                        struct nlattr *addr, struct nlattr *timed_out)
 614 {
 615         if (timed_out && addr) {
 616                 mlme_timeout_event(drv, cmd, addr);
 617                 return;
 618         }
 619
 620         if (frame == NULL) {
 621                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 622                            "data", cmd);
 623                 return;
 624         }
 625
 626         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 627         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 628                     nla_data(frame), nla_len(frame));
 629
 630         switch (cmd) {
 631         case NL80211_CMD_AUTHENTICATE:
 632                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 633                 break;
 634         case NL80211_CMD_ASSOCIATE:
 635                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 636                 break;
 637         case NL80211_CMD_DEAUTHENTICATE:
 638                 drv->associated = 0;
 639                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 640                 break;
 641         case NL80211_CMD_DISASSOCIATE:
 642                 drv->associated = 0;
 643                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 644                 break;
 645         default:
 646                 break;
 647         }
 648 }
 649
 650
 651 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 652                                            struct nlattr *tb[])
 653 {
 654         union wpa_event_data data;
 655
 656         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 657         os_memset(&data, 0, sizeof(data));
 658         if (tb[NL80211_ATTR_MAC]) {
 659                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 660                             nla_data(tb[NL80211_ATTR_MAC]),
 661                             nla_len(tb[NL80211_ATTR_MAC]));
 662                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 663         }
 664         if (tb[NL80211_ATTR_KEY_SEQ]) {
 665                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 666                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 667                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 668         }
 669         if (tb[NL80211_ATTR_KEY_TYPE]) {
 670                 enum nl80211_key_type key_type =
 671                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 672                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 673                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 674                         data.michael_mic_failure.unicast = 1;
 675         } else
 676                 data.michael_mic_failure.unicast = 1;
 677
 678         if (tb[NL80211_ATTR_KEY_IDX]) {
 679                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 680                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 681         }
 682
 683         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 684 }
 685
 686
 687 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 688                                  struct nlattr *tb[])
 689 {
 690         if (tb[NL80211_ATTR_MAC] == NULL) {
 691                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 692                            "event");
 693                 return;
 694         }
 695         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 696         drv->associated = 1;
 697         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 698                    MAC2STR(drv->bssid));
 699
 700         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 701 }
 702
 703
 704 static int process_event(struct nl_msg *msg, void *arg)
 705 {
 706         struct wpa_driver_nl80211_data *drv = arg;
 707         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 708         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 709
 710         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 711                   genlmsg_attrlen(gnlh, 0), NULL);
 712
 713         if (tb[NL80211_ATTR_IFINDEX]) {
 714                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 715                 if (ifindex != drv->ifindex) {
 716                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 717                                    " for foreign interface (ifindex %d)",
 718                                    gnlh->cmd, ifindex);
 719                         return NL_SKIP;
 720                 }
 721         }
 722
 723         if (drv->ap_scan_as_station &&
 724             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 725              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 726                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 727                 drv->ap_scan_as_station = 0;
 728         }
 729
 730         switch (gnlh->cmd) {
 731         case NL80211_CMD_TRIGGER_SCAN:
 732                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 733                 break;
 734         case NL80211_CMD_NEW_SCAN_RESULTS:
 735                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 736                 drv->scan_complete_events = 1;
 737                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 738                                      drv->ctx);
 739                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 740                 break;
 741         case NL80211_CMD_SCAN_ABORTED:
 742                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 743                 /*
 744                  * Need to indicate that scan results are available in order
 745                  * not to make wpa_supplicant stop its scanning.
 746                  */
 747                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 748                                      drv->ctx);
 749                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 750                 break;
 751         case NL80211_CMD_AUTHENTICATE:
 752         case NL80211_CMD_ASSOCIATE:
 753         case NL80211_CMD_DEAUTHENTICATE:
 754         case NL80211_CMD_DISASSOCIATE:
 755                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 756                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
 757                 break;
 758         case NL80211_CMD_CONNECT:
 759         case NL80211_CMD_ROAM:
 760                 mlme_event_connect(drv, gnlh->cmd,
 761                                    tb[NL80211_ATTR_STATUS_CODE],
 762                                    tb[NL80211_ATTR_MAC],
 763                                    tb[NL80211_ATTR_REQ_IE],
 764                                    tb[NL80211_ATTR_RESP_IE]);
 765                 break;
 766         case NL80211_CMD_DISCONNECT:
 767                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 768                         /*
 769                          * Avoid reporting two disassociation events that could
 770                          * confuse the core code.
 771                          */
 772                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 773                                    "event when using userspace SME");
 774                         break;
 775                 }
 776                 drv->associated = 0;
 777                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 778                 break;
 779         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 780                 mlme_event_michael_mic_failure(drv, tb);
 781                 break;
 782         case NL80211_CMD_JOIN_IBSS:
 783                 mlme_event_join_ibss(drv, tb);
 784                 break;
 785         default:
 786                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 787                            "(cmd=%d)", gnlh->cmd);
 788                 break;
 789         }
 790
 791         return NL_SKIP;
 792 }
 793
 794
 795 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 796                                              void *sock_ctx)
 797 {
 798         struct nl_cb *cb;
 799         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 800
 801         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 802
 803         cb = nl_cb_clone(drv->nl_cb);
 804         if (!cb)
 805                 return;
 806         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 807         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 808         nl_recvmsgs(drv->nl_handle_event, cb);
 809         nl_cb_put(cb);
 810 }
 811
 812
 813 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 814                                    const char *ifname, int dev_up)
 815 {
 816         struct ifreq ifr;
 817
 818         if (drv->ioctl_sock < 0)
 819                 return -1;
 820
 821         os_memset(&ifr, 0, sizeof(ifr));
 822         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 823
 824         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 825                 perror("ioctl[SIOCGIFFLAGS]");
 826                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 827                            ifname);
 828                 return -1;
 829         }
 830
 831         if (dev_up) {
 832                 if (ifr.ifr_flags & IFF_UP)
 833                         return 0;
 834                 ifr.ifr_flags |= IFF_UP;
 835         } else {
 836                 if (!(ifr.ifr_flags & IFF_UP))
 837                         return 0;
 838                 ifr.ifr_flags &= ~IFF_UP;
 839         }
 840
 841         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 842                 perror("ioctl[SIOCSIFFLAGS]");
 843                 return -1;
 844         }
 845
 846         return 0;
 847 }
 848
 849
 850 /**
 851  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 852  * @priv: driver_nl80211 private data
 853  * @alpha2_arg: country to which to switch to
 854  * Returns: 0 on success, -1 on failure
 855  *
 856  * This asks nl80211 to set the regulatory domain for given
 857  * country ISO / IEC alpha2.
 858  */
 859 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 860 {
 861         struct wpa_driver_nl80211_data *drv = priv;
 862         char alpha2[3];
 863         struct nl_msg *msg;
 864
 865         msg = nlmsg_alloc();
 866         if (!msg)
 867                 return -ENOMEM;
 868
 869         alpha2[0] = alpha2_arg[0];
 870         alpha2[1] = alpha2_arg[1];
 871         alpha2[2] = '\0';
 872
 873         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 874                     0, NL80211_CMD_REQ_SET_REG, 0);
 875
 876         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 877         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 878                 return -EINVAL;
 879         return 0;
 880 nla_put_failure:
 881         return -EINVAL;
 882 }
 883
 884
 885 #ifndef HOSTAPD
 886 struct wiphy_info_data {
 887         int max_scan_ssids;
 888         int ap_supported;
 889         int auth_supported;
 890         int connect_supported;
 891 };
 892
 893
 894 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 895 {
 896         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 897         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 898         struct wiphy_info_data *info = arg;
 899
 900         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 901                   genlmsg_attrlen(gnlh, 0), NULL);
 902
 903         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 904                 info->max_scan_ssids =
 905                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 906
 907         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 908                 struct nlattr *nl_mode;
 909                 int i;
 910                 nla_for_each_nested(nl_mode,
 911                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 912                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 913                                 info->ap_supported = 1;
 914                                 break;
 915                         }
 916                 }
 917         }
 918
 919         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
 920                 struct nlattr *nl_cmd;
 921                 int i;
 922
 923                 nla_for_each_nested(nl_cmd,
 924                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
 925                         u32 cmd = nla_get_u32(nl_cmd);
 926                         if (cmd == NL80211_CMD_AUTHENTICATE)
 927                                 info->auth_supported = 1;
 928                         else if (cmd == NL80211_CMD_CONNECT)
 929                                 info->connect_supported = 1;
 930                 }
 931         }
 932
 933         return NL_SKIP;
 934 }
 935
 936
 937 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 938                                        struct wiphy_info_data *info)
 939 {
 940         struct nl_msg *msg;
 941
 942         os_memset(info, 0, sizeof(*info));
 943         msg = nlmsg_alloc();
 944         if (!msg)
 945                 return -1;
 946
 947         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 948                     0, NL80211_CMD_GET_WIPHY, 0);
 949
 950         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 951
 952         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
 953                 return 0;
 954         msg = NULL;
 955 nla_put_failure:
 956         nlmsg_free(msg);
 957         return -1;
 958 }
 959
 960
 961 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
 962 {
 963         struct wiphy_info_data info;
 964         if (wpa_driver_nl80211_get_info(drv, &info))
 965                 return -1;
 966         drv->has_capability = 1;
 967         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
 968         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
 969                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
 970                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
 971                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
 972         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
 973                 WPA_DRIVER_CAPA_ENC_WEP104 |
 974                 WPA_DRIVER_CAPA_ENC_TKIP |
 975                 WPA_DRIVER_CAPA_ENC_CCMP;
 976
 977         drv->capa.max_scan_ssids = info.max_scan_ssids;
 978         if (info.ap_supported)
 979                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
 980
 981         if (info.auth_supported)
 982                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
 983         else if (!info.connect_supported) {
 984                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
 985                            "authentication/association or connect commands");
 986                 return -1;
 987         }
 988
 989         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
 990
 991         return 0;
 992 }
 993 #endif /* HOSTAPD */
 994
 995
 996 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
 997                                       void *ctx)
 998 {
 999         int ret;
1000
1001         /* Initialize generic netlink and nl80211 */
1002
1003         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1004         if (drv->nl_cb == NULL) {
1005                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1006                            "callbacks");
1007                 goto err1;
1008         }
1009
1010         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1011         if (drv->nl_handle == NULL) {
1012                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1013                            "callbacks");
1014                 goto err2;
1015         }
1016
1017         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1018         if (drv->nl_handle_event == NULL) {
1019                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1020                            "callbacks (event)");
1021                 goto err2b;
1022         }
1023
1024         if (genl_connect(drv->nl_handle)) {
1025                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1026                            "netlink");
1027                 goto err3;
1028         }
1029
1030         if (genl_connect(drv->nl_handle_event)) {
1031                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1032                            "netlink (event)");
1033                 goto err3;
1034         }
1035
1036 #ifdef CONFIG_LIBNL20
1037         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1038                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1039                            "netlink cache");
1040                 goto err3;
1041         }
1042         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1043             0) {
1044                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1045                            "netlink cache (event)");
1046                 goto err3b;
1047         }
1048 #else /* CONFIG_LIBNL20 */
1049         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1050         if (drv->nl_cache == NULL) {
1051                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1052                            "netlink cache");
1053                 goto err3;
1054         }
1055         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1056         if (drv->nl_cache_event == NULL) {
1057                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1058                            "netlink cache (event)");
1059                 goto err3b;
1060         }
1061 #endif /* CONFIG_LIBNL20 */
1062
1063         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1064         if (drv->nl80211 == NULL) {
1065                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1066                            "found");
1067                 goto err4;
1068         }
1069
1070         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1071         if (ret >= 0)
1072                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1073         if (ret < 0) {
1074                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1075                            "membership for scan events: %d (%s)",
1076                            ret, strerror(-ret));
1077                 goto err4;
1078         }
1079
1080         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1081         if (ret >= 0)
1082                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1083         if (ret < 0) {
1084                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1085                            "membership for mlme events: %d (%s)",
1086                            ret, strerror(-ret));
1087                 goto err4;
1088         }
1089
1090         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1091                                  wpa_driver_nl80211_event_receive, drv, ctx);
1092
1093         return 0;
1094
1095 err4:
1096         nl_cache_free(drv->nl_cache_event);
1097 err3b:
1098         nl_cache_free(drv->nl_cache);
1099 err3:
1100         nl_handle_destroy(drv->nl_handle_event);
1101 err2b:
1102         nl_handle_destroy(drv->nl_handle);
1103 err2:
1104         nl_cb_put(drv->nl_cb);
1105 err1:
1106         return -1;
1107 }
1108
1109
1110 /**
1111  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1112  * @ctx: context to be used when calling wpa_supplicant functions,
1113  * e.g., wpa_supplicant_event()
1114  * @ifname: interface name, e.g., wlan0
1115  * Returns: Pointer to private data, %NULL on failure
1116  */
1117 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1118 {
1119         struct wpa_driver_nl80211_data *drv;
1120         struct netlink_config *cfg;
1121
1122         drv = os_zalloc(sizeof(*drv));
1123         if (drv == NULL)
1124                 return NULL;
1125         drv->ctx = ctx;
1126         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1127         drv->monitor_ifidx = -1;
1128         drv->monitor_sock = -1;
1129         drv->ioctl_sock = -1;
1130
1131         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1132                 os_free(drv);
1133                 return NULL;
1134         }
1135
1136         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1137         if (drv->ioctl_sock < 0) {
1138                 perror("socket(PF_INET,SOCK_DGRAM)");
1139                 goto failed;
1140         }
1141
1142         cfg = os_zalloc(sizeof(*cfg));
1143         if (cfg == NULL)
1144                 goto failed;
1145         cfg->ctx = drv;
1146         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1147         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1148         drv->netlink = netlink_init(cfg);
1149         if (drv->netlink == NULL) {
1150                 os_free(cfg);
1151                 goto failed;
1152         }
1153         if (wpa_driver_nl80211_finish_drv_init(drv))
1154                 goto failed;
1155
1156         return drv;
1157
1158 failed:
1159         netlink_deinit(drv->netlink);
1160         if (drv->ioctl_sock >= 0)
1161                 close(drv->ioctl_sock);
1162
1163         genl_family_put(drv->nl80211);
1164         nl_cache_free(drv->nl_cache);
1165         nl_handle_destroy(drv->nl_handle);
1166         nl_cb_put(drv->nl_cb);
1167
1168         os_free(drv);
1169         return NULL;
1170 }
1171
1172
1173 static int
1174 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1175 {
1176         drv->ifindex = if_nametoindex(drv->ifname);
1177
1178 #ifndef HOSTAPD
1179         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1180                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1181                            "use managed mode");
1182         }
1183
1184         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1185                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1186                            "UP", drv->ifname);
1187                 return -1;
1188         }
1189
1190         if (wpa_driver_nl80211_capa(drv))
1191                 return -1;
1192
1193         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1194                                1, IF_OPER_DORMANT);
1195 #endif /* HOSTAPD */
1196
1197         return 0;
1198 }
1199
1200
1201 #ifdef HOSTAPD
1202 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1203 {
1204         struct i802_bss *bss, *prev;
1205         bss = drv->bss.next;
1206         while (bss) {
1207                 prev = bss;
1208                 bss = bss->next;
1209                 os_free(bss);
1210         }
1211 }
1212 #endif /* HOSTAPD */
1213
1214
1215 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1216 {
1217         struct nl_msg *msg;
1218
1219         msg = nlmsg_alloc();
1220         if (!msg)
1221                 return -ENOMEM;
1222
1223         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1224                     0, NL80211_CMD_DEL_BEACON, 0);
1225         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1226
1227         return send_and_recv_msgs(drv, msg, NULL, NULL);
1228  nla_put_failure:
1229         return -ENOBUFS;
1230 }
1231
1232
1233 /**
1234  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1235  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1236  *
1237  * Shut down driver interface and processing of driver events. Free
1238  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1239  */
1240 static void wpa_driver_nl80211_deinit(void *priv)
1241 {
1242         struct wpa_driver_nl80211_data *drv = priv;
1243
1244         nl80211_remove_monitor_interface(drv);
1245         if (drv->monitor_sock >= 0) {
1246                 eloop_unregister_read_sock(drv->monitor_sock);
1247                 close(drv->monitor_sock);
1248         }
1249
1250         if (drv->nlmode == NL80211_IFTYPE_AP)
1251                 wpa_driver_nl80211_del_beacon(drv);
1252
1253 #ifdef HOSTAPD
1254         if (drv->last_freq_ht) {
1255                 /* Clear HT flags from the driver */
1256                 struct hostapd_freq_params freq;
1257                 os_memset(&freq, 0, sizeof(freq));
1258                 freq.freq = drv->last_freq;
1259                 i802_set_freq(priv, &freq);
1260         }
1261
1262         if (drv->eapol_sock >= 0) {
1263                 eloop_unregister_read_sock(drv->eapol_sock);
1264                 close(drv->eapol_sock);
1265         }
1266
1267         if (drv->if_indices != drv->default_if_indices)
1268                 os_free(drv->if_indices);
1269
1270         wpa_driver_nl80211_free_bss(drv);
1271 #endif /* HOSTAPD */
1272
1273         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1274         netlink_deinit(drv->netlink);
1275
1276         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1277
1278         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1279         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1280
1281         if (drv->ioctl_sock >= 0)
1282                 close(drv->ioctl_sock);
1283
1284         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1285         genl_family_put(drv->nl80211);
1286         nl_cache_free(drv->nl_cache);
1287         nl_cache_free(drv->nl_cache_event);
1288         nl_handle_destroy(drv->nl_handle);
1289         nl_handle_destroy(drv->nl_handle_event);
1290         nl_cb_put(drv->nl_cb);
1291
1292         os_free(drv);
1293 }
1294
1295
1296 /**
1297  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1298  * @eloop_ctx: Driver private data
1299  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1300  *
1301  * This function can be used as registered timeout when starting a scan to
1302  * generate a scan completed event if the driver does not report this.
1303  */
1304 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1305 {
1306         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1307         if (drv->ap_scan_as_station) {
1308                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1309                 drv->ap_scan_as_station = 0;
1310         }
1311         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1312         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1313 }
1314
1315
1316 /**
1317  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1318  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1319  * @params: Scan parameters
1320  * Returns: 0 on success, -1 on failure
1321  */
1322 static int wpa_driver_nl80211_scan(void *priv,
1323                                    struct wpa_driver_scan_params *params)
1324 {
1325         struct wpa_driver_nl80211_data *drv = priv;
1326         int ret = 0, timeout;
1327         struct nl_msg *msg, *ssids, *freqs;
1328         size_t i;
1329
1330         msg = nlmsg_alloc();
1331         ssids = nlmsg_alloc();
1332         freqs = nlmsg_alloc();
1333         if (!msg || !ssids || !freqs) {
1334                 nlmsg_free(msg);
1335                 nlmsg_free(ssids);
1336                 nlmsg_free(freqs);
1337                 return -1;
1338         }
1339
1340         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1341                     NL80211_CMD_TRIGGER_SCAN, 0);
1342
1343         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1344
1345         for (i = 0; i < params->num_ssids; i++) {
1346                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1347                         params->ssids[i].ssid);
1348         }
1349         if (params->num_ssids)
1350                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1351
1352         if (params->extra_ies) {
1353                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1354                         params->extra_ies);
1355         }
1356
1357         if (params->freqs) {
1358                 for (i = 0; params->freqs[i]; i++)
1359                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1360                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1361         }
1362
1363         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1364         msg = NULL;
1365         if (ret) {
1366                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1367                            "(%s)", ret, strerror(-ret));
1368 #ifdef HOSTAPD
1369                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1370                         /*
1371                          * mac80211 does not allow scan requests in AP mode, so
1372                          * try to do this in station mode.
1373                          */
1374                         if (wpa_driver_nl80211_set_mode(drv,
1375                                                         IEEE80211_MODE_INFRA))
1376                                 goto nla_put_failure;
1377
1378                         if (wpa_driver_nl80211_scan(drv, params)) {
1379                                 wpa_driver_nl80211_set_mode(drv,
1380                                                             IEEE80211_MODE_AP);
1381                                 goto nla_put_failure;
1382                         }
1383
1384                         /* Restore AP mode when processing scan results */
1385                         drv->ap_scan_as_station = 1;
1386                         ret = 0;
1387                 } else
1388                         goto nla_put_failure;
1389 #else /* HOSTAPD */
1390                 goto nla_put_failure;
1391 #endif /* HOSTAPD */
1392         }
1393
1394         /* Not all drivers generate "scan completed" wireless event, so try to
1395          * read results after a timeout. */
1396         timeout = 10;
1397         if (drv->scan_complete_events) {
1398                 /*
1399                  * The driver seems to deliver events to notify when scan is
1400                  * complete, so use longer timeout to avoid race conditions
1401                  * with scanning and following association request.
1402                  */
1403                 timeout = 30;
1404         }
1405         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1406                    "seconds", ret, timeout);
1407         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1408         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1409                                drv, drv->ctx);
1410
1411 nla_put_failure:
1412         nlmsg_free(ssids);
1413         nlmsg_free(msg);
1414         nlmsg_free(freqs);
1415         return ret;
1416 }
1417
1418
1419 static int bss_info_handler(struct nl_msg *msg, void *arg)
1420 {
1421         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1422         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1423         struct nlattr *bss[NL80211_BSS_MAX + 1];
1424         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1425                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1426                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1427                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1428                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1429                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1430                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1431                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1432                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1433                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1434                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1435         };
1436         struct wpa_scan_results *res = arg;
1437         struct wpa_scan_res **tmp;
1438         struct wpa_scan_res *r;
1439         const u8 *ie;
1440         size_t ie_len;
1441
1442         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1443                   genlmsg_attrlen(gnlh, 0), NULL);
1444         if (!tb[NL80211_ATTR_BSS])
1445                 return NL_SKIP;
1446         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1447                              bss_policy))
1448                 return NL_SKIP;
1449         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1450                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1451                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1452         } else {
1453                 ie = NULL;
1454                 ie_len = 0;
1455         }
1456
1457         r = os_zalloc(sizeof(*r) + ie_len);
1458         if (r == NULL)
1459                 return NL_SKIP;
1460         if (bss[NL80211_BSS_BSSID])
1461                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1462                           ETH_ALEN);
1463         if (bss[NL80211_BSS_FREQUENCY])
1464                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1465         if (bss[NL80211_BSS_BEACON_INTERVAL])
1466                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1467         if (bss[NL80211_BSS_CAPABILITY])
1468                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1469         r->flags |= WPA_SCAN_NOISE_INVALID;
1470         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1471                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1472                 r->level /= 100; /* mBm to dBm */
1473                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1474         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1475                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1476                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1477         } else
1478                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1479         if (bss[NL80211_BSS_TSF])
1480                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1481         if (bss[NL80211_BSS_SEEN_MS_AGO])
1482                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1483         r->ie_len = ie_len;
1484         if (ie)
1485                 os_memcpy(r + 1, ie, ie_len);
1486
1487         if (bss[NL80211_BSS_STATUS]) {
1488                 enum nl80211_bss_status status;
1489                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1490                 switch (status) {
1491                 case NL80211_BSS_STATUS_AUTHENTICATED:
1492                         r->flags |= WPA_SCAN_AUTHENTICATED;
1493                         break;
1494                 case NL80211_BSS_STATUS_ASSOCIATED:
1495                         r->flags |= WPA_SCAN_ASSOCIATED;
1496                         break;
1497                 default:
1498                         break;
1499                 }
1500         }
1501
1502         tmp = os_realloc(res->res,
1503                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1504         if (tmp == NULL) {
1505                 os_free(r);
1506                 return NL_SKIP;
1507         }
1508         tmp[res->num++] = r;
1509         res->res = tmp;
1510
1511         return NL_SKIP;
1512 }
1513
1514
1515 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1516                                  const u8 *addr)
1517 {
1518         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1519                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1520                            "mismatch");
1521                 wpa_driver_nl80211_mlme(drv, addr,
1522                                         NL80211_CMD_DEAUTHENTICATE,
1523                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1524         }
1525 }
1526
1527
1528 static void wpa_driver_nl80211_check_bss_status(
1529         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1530 {
1531         size_t i;
1532
1533         for (i = 0; i < res->num; i++) {
1534                 struct wpa_scan_res *r = res->res[i];
1535                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1536                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1537                                    "indicates BSS status with " MACSTR
1538                                    " as authenticated",
1539                                    MAC2STR(r->bssid));
1540                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1541                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1542                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1543                             0) {
1544                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1545                                            " in local state (auth=" MACSTR
1546                                            " assoc=" MACSTR ")",
1547                                            MAC2STR(drv->auth_bssid),
1548                                            MAC2STR(drv->bssid));
1549                         }
1550                 }
1551
1552                 if (r->flags & WPA_SCAN_ASSOCIATED) {
1553                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1554                                    "indicate BSS status with " MACSTR
1555                                    " as associated",
1556                                    MAC2STR(r->bssid));
1557                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1558                             !drv->associated) {
1559                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1560                                            "(not associated) does not match "
1561                                            "with BSS state");
1562                                 clear_state_mismatch(drv, r->bssid);
1563                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1564                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1565                                    0) {
1566                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1567                                            "(associated with " MACSTR ") does "
1568                                            "not match with BSS state",
1569                                            MAC2STR(drv->bssid));
1570                                 clear_state_mismatch(drv, r->bssid);
1571                                 clear_state_mismatch(drv, drv->bssid);
1572                         }
1573                 }
1574         }
1575 }
1576
1577
1578 /**
1579  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1580  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1581  * Returns: Scan results on success, -1 on failure
1582  */
1583 static struct wpa_scan_results *
1584 wpa_driver_nl80211_get_scan_results(void *priv)
1585 {
1586         struct wpa_driver_nl80211_data *drv = priv;
1587         struct nl_msg *msg;
1588         struct wpa_scan_results *res;
1589         int ret;
1590
1591         res = os_zalloc(sizeof(*res));
1592         if (res == NULL)
1593                 return NULL;
1594         msg = nlmsg_alloc();
1595         if (!msg)
1596                 goto nla_put_failure;
1597
1598         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1599                     NL80211_CMD_GET_SCAN, 0);
1600         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1601
1602         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1603         msg = NULL;
1604         if (ret == 0) {
1605                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1606                            (unsigned long) res->num);
1607                 wpa_driver_nl80211_check_bss_status(drv, res);
1608                 return res;
1609         }
1610         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1611                    "(%s)", ret, strerror(-ret));
1612 nla_put_failure:
1613         nlmsg_free(msg);
1614         wpa_scan_results_free(res);
1615         return NULL;
1616 }
1617
1618
1619 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1620                                       wpa_alg alg, const u8 *addr, int key_idx,
1621                                       int set_tx,
1622                                       const u8 *seq, size_t seq_len,
1623                                       const u8 *key, size_t key_len)
1624 {
1625         struct wpa_driver_nl80211_data *drv = priv;
1626         int ifindex = if_nametoindex(ifname);
1627         struct nl_msg *msg;
1628         int ret;
1629
1630         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1631                    "set_tx=%d seq_len=%lu key_len=%lu",
1632                    __func__, ifindex, alg, addr, key_idx, set_tx,
1633                    (unsigned long) seq_len, (unsigned long) key_len);
1634
1635         msg = nlmsg_alloc();
1636         if (!msg)
1637                 return -ENOMEM;
1638
1639         if (alg == WPA_ALG_NONE) {
1640                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1641                             0, NL80211_CMD_DEL_KEY, 0);
1642         } else {
1643                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1644                             0, NL80211_CMD_NEW_KEY, 0);
1645                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1646                 switch (alg) {
1647                 case WPA_ALG_WEP:
1648                         if (key_len == 5)
1649                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1650                                             WLAN_CIPHER_SUITE_WEP40);
1651                         else
1652                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1653                                             WLAN_CIPHER_SUITE_WEP104);
1654                         break;
1655                 case WPA_ALG_TKIP:
1656                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1657                                     WLAN_CIPHER_SUITE_TKIP);
1658                         break;
1659                 case WPA_ALG_CCMP:
1660                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1661                                     WLAN_CIPHER_SUITE_CCMP);
1662                         break;
1663                 case WPA_ALG_IGTK:
1664                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1665                                     WLAN_CIPHER_SUITE_AES_CMAC);
1666                         break;
1667                 default:
1668                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1669                                    "algorithm %d", __func__, alg);
1670                         nlmsg_free(msg);
1671                         return -1;
1672                 }
1673         }
1674
1675         if (seq && seq_len)
1676                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1677
1678         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1679         {
1680                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1681                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1682         }
1683         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1684         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1685
1686         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1687         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1688                 ret = 0;
1689         if (ret)
1690                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1691                            ret, strerror(-ret));
1692
1693         /*
1694          * If we failed or don't need to set the default TX key (below),
1695          * we're done here.
1696          */
1697         if (ret || !set_tx || alg == WPA_ALG_NONE)
1698                 return ret;
1699 #ifdef HOSTAPD /* FIX: is this needed? */
1700         if (addr)
1701                 return ret;
1702 #endif /* HOSTAPD */
1703
1704         msg = nlmsg_alloc();
1705         if (!msg)
1706                 return -ENOMEM;
1707
1708         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1709                     0, NL80211_CMD_SET_KEY, 0);
1710         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1711         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1712         if (alg == WPA_ALG_IGTK)
1713                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1714         else
1715                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1716
1717         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1718         if (ret == -ENOENT)
1719                 ret = 0;
1720         if (ret)
1721                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1722                            "err=%d %s)", ret, strerror(-ret));
1723         return ret;
1724
1725 nla_put_failure:
1726         return -ENOBUFS;
1727 }
1728
1729
1730 static int nl_add_key(struct nl_msg *msg, wpa_alg alg,
1731                       int key_idx, int defkey,
1732                       const u8 *seq, size_t seq_len,
1733                       const u8 *key, size_t key_len)
1734 {
1735         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1736         if (!key_attr)
1737                 return -1;
1738
1739         if (defkey && alg == WPA_ALG_IGTK)
1740                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1741         else if (defkey)
1742                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1743
1744         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1745
1746         switch (alg) {
1747         case WPA_ALG_WEP:
1748                 if (key_len == 5)
1749                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1750                                     WLAN_CIPHER_SUITE_WEP40);
1751                 else
1752                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1753                                     WLAN_CIPHER_SUITE_WEP104);
1754                 break;
1755         case WPA_ALG_TKIP:
1756                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1757                 break;
1758         case WPA_ALG_CCMP:
1759                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1760                 break;
1761         case WPA_ALG_IGTK:
1762                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1763                             WLAN_CIPHER_SUITE_AES_CMAC);
1764                 break;
1765         default:
1766                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1767                            "algorithm %d", __func__, alg);
1768                 return -1;
1769         }
1770
1771         if (seq && seq_len)
1772                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1773
1774         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1775
1776         nla_nest_end(msg, key_attr);
1777
1778         return 0;
1779  nla_put_failure:
1780         return -1;
1781 }
1782
1783
1784 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1785                                  struct nl_msg *msg)
1786 {
1787         int i, privacy = 0;
1788         struct nlattr *nl_keys, *nl_key;
1789
1790         for (i = 0; i < 4; i++) {
1791                 if (!params->wep_key[i])
1792                         continue;
1793                 privacy = 1;
1794                 break;
1795         }
1796         if (!privacy)
1797                 return 0;
1798
1799         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1800
1801         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1802         if (!nl_keys)
1803                 goto nla_put_failure;
1804
1805         for (i = 0; i < 4; i++) {
1806                 if (!params->wep_key[i])
1807                         continue;
1808
1809                 nl_key = nla_nest_start(msg, i);
1810                 if (!nl_key)
1811                         goto nla_put_failure;
1812
1813                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1814                         params->wep_key[i]);
1815                 if (params->wep_key_len[i] == 5)
1816                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1817                                     WLAN_CIPHER_SUITE_WEP40);
1818                 else
1819                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1820                                     WLAN_CIPHER_SUITE_WEP104);
1821
1822                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1823
1824                 if (i == params->wep_tx_keyidx)
1825                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1826
1827                 nla_nest_end(msg, nl_key);
1828         }
1829         nla_nest_end(msg, nl_keys);
1830
1831         return 0;
1832
1833 nla_put_failure:
1834         return -ENOBUFS;
1835 }
1836
1837
1838 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1839                                    const u8 *addr, int cmd, u16 reason_code)
1840 {
1841         int ret = -1;
1842         struct nl_msg *msg;
1843
1844         msg = nlmsg_alloc();
1845         if (!msg)
1846                 return -1;
1847
1848         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1849
1850         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1851         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1852         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1853
1854         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1855         msg = NULL;
1856         if (ret) {
1857                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1858                            "(%s)", ret, strerror(-ret));
1859                 goto nla_put_failure;
1860         }
1861         ret = 0;
1862
1863 nla_put_failure:
1864         nlmsg_free(msg);
1865         return ret;
1866 }
1867
1868
1869 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
1870                                          const u8 *addr, int reason_code)
1871 {
1872         wpa_printf(MSG_DEBUG, "%s", __func__);
1873         drv->associated = 0;
1874         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
1875                                        reason_code);
1876 }
1877
1878
1879 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1880                                              int reason_code)
1881 {
1882         struct wpa_driver_nl80211_data *drv = priv;
1883         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1884                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1885         wpa_printf(MSG_DEBUG, "%s", __func__);
1886         drv->associated = 0;
1887         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1888                                        reason_code);
1889 }
1890
1891
1892 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1893                                            int reason_code)
1894 {
1895         struct wpa_driver_nl80211_data *drv = priv;
1896         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1897                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1898         wpa_printf(MSG_DEBUG, "%s", __func__);
1899         drv->associated = 0;
1900         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1901                                        reason_code);
1902 }
1903
1904
1905 static int wpa_driver_nl80211_authenticate(
1906         void *priv, struct wpa_driver_auth_params *params)
1907 {
1908         struct wpa_driver_nl80211_data *drv = priv;
1909         int ret = -1, i;
1910         struct nl_msg *msg;
1911         enum nl80211_auth_type type;
1912         int count = 0;
1913
1914         drv->associated = 0;
1915         os_memset(drv->auth_bssid, 0, ETH_ALEN);
1916
1917         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
1918                 return -1;
1919
1920 retry:
1921         msg = nlmsg_alloc();
1922         if (!msg)
1923                 return -1;
1924
1925         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1926                    drv->ifindex);
1927
1928         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1929                     NL80211_CMD_AUTHENTICATE, 0);
1930
1931         for (i = 0; i < 4; i++) {
1932                 if (!params->wep_key[i])
1933                         continue;
1934                 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
1935                                            i,
1936                                            i == params->wep_tx_keyidx, NULL, 0,
1937                                            params->wep_key[i],
1938                                            params->wep_key_len[i]);
1939                 if (params->wep_tx_keyidx != i)
1940                         continue;
1941                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
1942                                params->wep_key[i], params->wep_key_len[i])) {
1943                         nlmsg_free(msg);
1944                         return -1;
1945                 }
1946         }
1947
1948         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1949         if (params->bssid) {
1950                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1951                            MAC2STR(params->bssid));
1952                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1953         }
1954         if (params->freq) {
1955                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1956                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1957         }
1958         if (params->ssid) {
1959                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1960                                   params->ssid, params->ssid_len);
1961                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1962                         params->ssid);
1963         }
1964         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1965         if (params->ie)
1966                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1967         /*
1968          * TODO: if multiple auth_alg options enabled, try them one by one if
1969          * the AP rejects authentication due to unknown auth alg
1970          */
1971         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1972                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1973         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1974                 type = NL80211_AUTHTYPE_SHARED_KEY;
1975         else if (params->auth_alg & AUTH_ALG_LEAP)
1976                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1977         else if (params->auth_alg & AUTH_ALG_FT)
1978                 type = NL80211_AUTHTYPE_FT;
1979         else
1980                 goto nla_put_failure;
1981         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1982         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1983
1984         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1985         msg = NULL;
1986         if (ret) {
1987                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1988                            "(%s)", ret, strerror(-ret));
1989                 count++;
1990                 if (ret == -EALREADY && count == 1 && params->bssid) {
1991                         /*
1992                          * mac80211 does not currently accept new
1993                          * authentication if we are already authenticated. As a
1994                          * workaround, force deauthentication and try again.
1995                          */
1996                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
1997                                    "after forced deauthentication");
1998                         wpa_driver_nl80211_deauthenticate(
1999                                 drv, params->bssid,
2000                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2001                         nlmsg_free(msg);
2002                         goto retry;
2003                 }
2004                 goto nla_put_failure;
2005         }
2006         ret = 0;
2007         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2008                    "successfully");
2009
2010 nla_put_failure:
2011         nlmsg_free(msg);
2012         return ret;
2013 }
2014
2015
2016 struct phy_info_arg {
2017         u16 *num_modes;
2018         struct hostapd_hw_modes *modes;
2019 };
2020
2021 static int phy_info_handler(struct nl_msg *msg, void *arg)
2022 {
2023         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2024         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2025         struct phy_info_arg *phy_info = arg;
2026
2027         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2028
2029         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2030         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2031                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2032                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2033                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2034                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2035                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2036                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2037         };
2038
2039         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2040         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2041                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2042                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2043         };
2044
2045         struct nlattr *nl_band;
2046         struct nlattr *nl_freq;
2047         struct nlattr *nl_rate;
2048         int rem_band, rem_freq, rem_rate;
2049         struct hostapd_hw_modes *mode;
2050         int idx, mode_is_set;
2051
2052         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2053                   genlmsg_attrlen(gnlh, 0), NULL);
2054
2055         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2056                 return NL_SKIP;
2057
2058         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2059                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2060                 if (!mode)
2061                         return NL_SKIP;
2062                 phy_info->modes = mode;
2063
2064                 mode_is_set = 0;
2065
2066                 mode = &phy_info->modes[*(phy_info->num_modes)];
2067                 memset(mode, 0, sizeof(*mode));
2068                 *(phy_info->num_modes) += 1;
2069
2070                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2071                           nla_len(nl_band), NULL);
2072
2073                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2074                         mode->ht_capab = nla_get_u16(
2075                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2076                 }
2077
2078                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2079                         mode->a_mpdu_params |= nla_get_u8(
2080                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2081                                 0x03;
2082                 }
2083
2084                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2085                         mode->a_mpdu_params |= nla_get_u8(
2086                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2087                                 2;
2088                 }
2089
2090                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2091                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2092                         u8 *mcs;
2093                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2094                         os_memcpy(mode->mcs_set, mcs, 16);
2095                 }
2096
2097                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2098                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2099                                   nla_len(nl_freq), freq_policy);
2100                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2101                                 continue;
2102                         mode->num_channels++;
2103                 }
2104
2105                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
2106                 if (!mode->channels)
2107                         return NL_SKIP;
2108
2109                 idx = 0;
2110
2111                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2112                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2113                                   nla_len(nl_freq), freq_policy);
2114                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2115                                 continue;
2116
2117                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2118                         mode->channels[idx].flag = 0;
2119
2120                         if (!mode_is_set) {
2121                                 /* crude heuristic */
2122                                 if (mode->channels[idx].freq < 4000)
2123                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2124                                 else
2125                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2126                                 mode_is_set = 1;
2127                         }
2128
2129                         /* crude heuristic */
2130                         if (mode->channels[idx].freq < 4000)
2131                                 if (mode->channels[idx].freq == 2484)
2132                                         mode->channels[idx].chan = 14;
2133                                 else
2134                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2135                         else
2136                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2137
2138                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2139                                 mode->channels[idx].flag |=
2140                                         HOSTAPD_CHAN_DISABLED;
2141                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2142                                 mode->channels[idx].flag |=
2143                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2144                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2145                                 mode->channels[idx].flag |=
2146                                         HOSTAPD_CHAN_NO_IBSS;
2147                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2148                                 mode->channels[idx].flag |=
2149                                         HOSTAPD_CHAN_RADAR;
2150
2151                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2152                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2153                                 mode->channels[idx].max_tx_power =
2154                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2155
2156                         idx++;
2157                 }
2158
2159                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2160                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2161                                   nla_len(nl_rate), rate_policy);
2162                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2163                                 continue;
2164                         mode->num_rates++;
2165                 }
2166
2167                 mode->rates = calloc(mode->num_rates, sizeof(int));
2168                 if (!mode->rates)
2169                         return NL_SKIP;
2170
2171                 idx = 0;
2172
2173                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2174                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2175                                   nla_len(nl_rate), rate_policy);
2176                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2177                                 continue;
2178                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2179
2180                         /* crude heuristic */
2181                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2182                             mode->rates[idx] > 200)
2183                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2184
2185                         idx++;
2186                 }
2187         }
2188
2189         return NL_SKIP;
2190 }
2191
2192 static struct hostapd_hw_modes *
2193 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2194 {
2195         u16 m;
2196         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2197         int i, mode11g_idx = -1;
2198
2199         /* If only 802.11g mode is included, use it to construct matching
2200          * 802.11b mode data. */
2201
2202         for (m = 0; m < *num_modes; m++) {
2203                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2204                         return modes; /* 802.11b already included */
2205                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2206                         mode11g_idx = m;
2207         }
2208
2209         if (mode11g_idx < 0)
2210                 return modes; /* 2.4 GHz band not supported at all */
2211
2212         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2213         if (nmodes == NULL)
2214                 return modes; /* Could not add 802.11b mode */
2215
2216         mode = &nmodes[*num_modes];
2217         os_memset(mode, 0, sizeof(*mode));
2218         (*num_modes)++;
2219         modes = nmodes;
2220
2221         mode->mode = HOSTAPD_MODE_IEEE80211B;
2222
2223         mode11g = &modes[mode11g_idx];
2224         mode->num_channels = mode11g->num_channels;
2225         mode->channels = os_malloc(mode11g->num_channels *
2226                                    sizeof(struct hostapd_channel_data));
2227         if (mode->channels == NULL) {
2228                 (*num_modes)--;
2229                 return modes; /* Could not add 802.11b mode */
2230         }
2231         os_memcpy(mode->channels, mode11g->channels,
2232                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2233
2234         mode->num_rates = 0;
2235         mode->rates = os_malloc(4 * sizeof(int));
2236         if (mode->rates == NULL) {
2237                 os_free(mode->channels);
2238                 (*num_modes)--;
2239                 return modes; /* Could not add 802.11b mode */
2240         }
2241
2242         for (i = 0; i < mode11g->num_rates; i++) {
2243                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2244                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2245                         continue;
2246                 mode->rates[mode->num_rates] = mode11g->rates[i];
2247                 mode->num_rates++;
2248                 if (mode->num_rates == 4)
2249                         break;
2250         }
2251
2252         if (mode->num_rates == 0) {
2253                 os_free(mode->channels);
2254                 os_free(mode->rates);
2255                 (*num_modes)--;
2256                 return modes; /* No 802.11b rates */
2257         }
2258
2259         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2260                    "information");
2261
2262         return modes;
2263 }
2264
2265
2266 static struct hostapd_hw_modes *
2267 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2268 {
2269         struct wpa_driver_nl80211_data *drv = priv;
2270         struct nl_msg *msg;
2271         struct phy_info_arg result = {
2272                 .num_modes = num_modes,
2273                 .modes = NULL,
2274         };
2275
2276         *num_modes = 0;
2277         *flags = 0;
2278
2279         msg = nlmsg_alloc();
2280         if (!msg)
2281                 return NULL;
2282
2283         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2284                     0, NL80211_CMD_GET_WIPHY, 0);
2285
2286         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2287
2288         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2289                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2290  nla_put_failure:
2291         return NULL;
2292 }
2293
2294
2295 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2296                                          const void *data, size_t len,
2297                                          int encrypt)
2298 {
2299         __u8 rtap_hdr[] = {
2300                 0x00, 0x00, /* radiotap version */
2301                 0x0e, 0x00, /* radiotap length */
2302                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2303                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2304                 0x00,       /* padding */
2305                 0x00, 0x00, /* RX and TX flags to indicate that */
2306                 0x00, 0x00, /* this is the injected frame directly */
2307         };
2308         struct iovec iov[2] = {
2309                 {
2310                         .iov_base = &rtap_hdr,
2311                         .iov_len = sizeof(rtap_hdr),
2312                 },
2313                 {
2314                         .iov_base = (void *) data,
2315                         .iov_len = len,
2316                 }
2317         };
2318         struct msghdr msg = {
2319                 .msg_name = NULL,
2320                 .msg_namelen = 0,
2321                 .msg_iov = iov,
2322                 .msg_iovlen = 2,
2323                 .msg_control = NULL,
2324                 .msg_controllen = 0,
2325                 .msg_flags = 0,
2326         };
2327
2328         if (encrypt)
2329                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2330
2331         return sendmsg(drv->monitor_sock, &msg, 0);
2332 }
2333
2334
2335 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2336                                         size_t data_len)
2337 {
2338         struct wpa_driver_nl80211_data *drv = priv;
2339         struct ieee80211_mgmt *mgmt;
2340         int encrypt = 1;
2341         u16 fc;
2342
2343         mgmt = (struct ieee80211_mgmt *) data;
2344         fc = le_to_host16(mgmt->frame_control);
2345
2346         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2347             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2348                 /*
2349                  * Only one of the authentication frame types is encrypted.
2350                  * In order for static WEP encryption to work properly (i.e.,
2351                  * to not encrypt the frame), we need to tell mac80211 about
2352                  * the frames that must not be encrypted.
2353                  */
2354                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2355                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2356                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2357                         encrypt = 0;
2358         }
2359
2360         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2361 }
2362
2363
2364 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2365                                          const u8 *head, size_t head_len,
2366                                          const u8 *tail, size_t tail_len,
2367                                          int dtim_period, int beacon_int)
2368 {
2369         struct wpa_driver_nl80211_data *drv = priv;
2370         struct nl_msg *msg;
2371         u8 cmd = NL80211_CMD_NEW_BEACON;
2372         int ret;
2373         int beacon_set;
2374         int ifindex = if_nametoindex(ifname);
2375 #ifdef HOSTAPD
2376         struct i802_bss *bss;
2377
2378         bss = get_bss(drv, ifindex);
2379         if (bss == NULL)
2380                 return -ENOENT;
2381         beacon_set = bss->beacon_set;
2382 #else /* HOSTAPD */
2383         beacon_set = drv->beacon_set;
2384 #endif /* HOSTAPD */
2385
2386         msg = nlmsg_alloc();
2387         if (!msg)
2388                 return -ENOMEM;
2389
2390         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2391                    beacon_set);
2392         if (beacon_set)
2393                 cmd = NL80211_CMD_SET_BEACON;
2394
2395         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2396                     0, cmd, 0);
2397         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2398         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2399         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2400         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2401         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2402
2403         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2404         if (ret) {
2405                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2406                            ret, strerror(-ret));
2407         } else {
2408 #ifdef HOSTAPD
2409                 bss->beacon_set = 1;
2410 #else /* HOSTAPD */
2411                 drv->beacon_set = 1;
2412 #endif /* HOSTAPD */
2413         }
2414         return ret;
2415  nla_put_failure:
2416         return -ENOBUFS;
2417 }
2418
2419
2420 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2421                                        int freq, int ht_enabled,
2422                                        int sec_channel_offset)
2423 {
2424         struct nl_msg *msg;
2425         int ret;
2426
2427         msg = nlmsg_alloc();
2428         if (!msg)
2429                 return -1;
2430
2431         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2432                     NL80211_CMD_SET_WIPHY, 0);
2433
2434         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2435         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2436         if (ht_enabled) {
2437                 switch (sec_channel_offset) {
2438                 case -1:
2439                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2440                                     NL80211_CHAN_HT40MINUS);
2441                         break;
2442                 case 1:
2443                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2444                                     NL80211_CHAN_HT40PLUS);
2445                         break;
2446                 default:
2447                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2448                                     NL80211_CHAN_HT20);
2449                         break;
2450                 }
2451         }
2452
2453         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2454         if (ret == 0)
2455                 return 0;
2456         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2457                    "%d (%s)", freq, ret, strerror(-ret));
2458 nla_put_failure:
2459         return -1;
2460 }
2461
2462
2463 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2464                                       struct hostapd_sta_add_params *params)
2465 {
2466         struct wpa_driver_nl80211_data *drv = priv;
2467         struct nl_msg *msg;
2468         int ret = -ENOBUFS;
2469
2470         msg = nlmsg_alloc();
2471         if (!msg)
2472                 return -ENOMEM;
2473
2474         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2475                     0, NL80211_CMD_NEW_STATION, 0);
2476
2477         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2478         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2479         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2480         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2481                 params->supp_rates);
2482         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2483                     params->listen_interval);
2484         if (params->ht_capabilities) {
2485                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2486                         sizeof(*params->ht_capabilities),
2487                         params->ht_capabilities);
2488         }
2489
2490         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2491         if (ret)
2492                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2493                            "result: %d (%s)", ret, strerror(-ret));
2494         if (ret == -EEXIST)
2495                 ret = 0;
2496  nla_put_failure:
2497         return ret;
2498 }
2499
2500
2501 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2502 {
2503         struct wpa_driver_nl80211_data *drv = priv;
2504         struct nl_msg *msg;
2505         int ret;
2506
2507         msg = nlmsg_alloc();
2508         if (!msg)
2509                 return -ENOMEM;
2510
2511         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2512                     0, NL80211_CMD_DEL_STATION, 0);
2513
2514         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2515                     if_nametoindex(drv->ifname));
2516         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2517
2518         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2519         if (ret == -ENOENT)
2520                 return 0;
2521         return ret;
2522  nla_put_failure:
2523         return -ENOBUFS;
2524 }
2525
2526
2527 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2528                                  int ifidx)
2529 {
2530         struct nl_msg *msg;
2531
2532 #ifdef HOSTAPD
2533         /* stop listening for EAPOL on this interface */
2534         del_ifidx(drv, ifidx);
2535 #endif /* HOSTAPD */
2536
2537         msg = nlmsg_alloc();
2538         if (!msg)
2539                 goto nla_put_failure;
2540
2541         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2542                     0, NL80211_CMD_DEL_INTERFACE, 0);
2543         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2544
2545         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2546                 return;
2547  nla_put_failure:
2548         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2549                    ifidx);
2550 }
2551
2552
2553 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2554                                      const char *ifname,
2555                                      enum nl80211_iftype iftype,
2556                                      const u8 *addr)
2557 {
2558         struct nl_msg *msg, *flags = NULL;
2559         int ifidx;
2560         int ret = -ENOBUFS;
2561
2562         msg = nlmsg_alloc();
2563         if (!msg)
2564                 return -1;
2565
2566         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2567                     0, NL80211_CMD_NEW_INTERFACE, 0);
2568         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2569         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2570         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2571
2572         if (iftype == NL80211_IFTYPE_MONITOR) {
2573                 int err;
2574
2575                 flags = nlmsg_alloc();
2576                 if (!flags)
2577                         goto nla_put_failure;
2578
2579                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2580
2581                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2582
2583                 nlmsg_free(flags);
2584
2585                 if (err)
2586                         goto nla_put_failure;
2587         }
2588
2589         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2590         if (ret) {
2591  nla_put_failure:
2592                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2593                            ifname, ret, strerror(-ret));
2594                 return ret;
2595         }
2596
2597         ifidx = if_nametoindex(ifname);
2598
2599         if (ifidx <= 0)
2600                 return -1;
2601
2602 #ifdef HOSTAPD
2603         /* start listening for EAPOL on this interface */
2604         add_ifidx(drv, ifidx);
2605
2606         if (addr && iftype == NL80211_IFTYPE_AP &&
2607             set_ifhwaddr(drv, ifname, addr)) {
2608                 nl80211_remove_iface(drv, ifidx);
2609                 return -1;
2610         }
2611 #endif /* HOSTAPD */
2612
2613         return ifidx;
2614 }
2615
2616
2617 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2618                                 const char *ifname, enum nl80211_iftype iftype,
2619                                 const u8 *addr)
2620 {
2621         int ret;
2622
2623         ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2624
2625         /* if error occured and interface exists already */
2626         if (ret == -ENFILE && if_nametoindex(ifname)) {
2627                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2628
2629                 /* Try to remove the interface that was already there. */
2630                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2631
2632                 /* Try to create the interface again */
2633                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2634         }
2635
2636         return ret;
2637 }
2638
2639
2640 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2641 {
2642         struct ieee80211_hdr *hdr;
2643         u16 fc;
2644         union wpa_event_data event;
2645
2646         hdr = (struct ieee80211_hdr *) buf;
2647         fc = le_to_host16(hdr->frame_control);
2648
2649         os_memset(&event, 0, sizeof(event));
2650         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
2651         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
2652         event.tx_status.dst = hdr->addr1;
2653         event.tx_status.data = buf;
2654         event.tx_status.data_len = len;
2655         event.tx_status.ack = ok;
2656         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
2657 }
2658
2659
2660 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2661                              struct ieee80211_hdr *hdr, size_t len)
2662 {
2663         union wpa_event_data event;
2664         os_memset(&event, 0, sizeof(event));
2665         event.rx_from_unknown.hdr = hdr;
2666         event.rx_from_unknown.len = len;
2667         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
2668 }
2669
2670
2671 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2672                          u8 *buf, size_t len,
2673                          struct hostapd_frame_info *hfi)
2674 {
2675         struct ieee80211_hdr *hdr;
2676         u16 fc;
2677         union wpa_event_data event;
2678
2679         hdr = (struct ieee80211_hdr *) buf;
2680         fc = le_to_host16(hdr->frame_control);
2681
2682         switch (WLAN_FC_GET_TYPE(fc)) {
2683         case WLAN_FC_TYPE_MGMT:
2684                 os_memset(&event, 0, sizeof(event));
2685                 event.rx_mgmt.frame = buf;
2686                 event.rx_mgmt.frame_len = len;
2687                 event.rx_mgmt.fi = hfi;
2688                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
2689                 break;
2690         case WLAN_FC_TYPE_CTRL:
2691                 /* can only get here with PS-Poll frames */
2692                 wpa_printf(MSG_DEBUG, "CTRL");
2693                 from_unknown_sta(drv, hdr, len);
2694                 break;
2695         case WLAN_FC_TYPE_DATA:
2696                 from_unknown_sta(drv, hdr, len);
2697                 break;
2698         }
2699 }
2700
2701
2702 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2703 {
2704         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2705         int len;
2706         unsigned char buf[3000];
2707         struct ieee80211_radiotap_iterator iter;
2708         int ret;
2709         struct hostapd_frame_info hfi;
2710         int injected = 0, failed = 0, rxflags = 0;
2711
2712         len = recv(sock, buf, sizeof(buf), 0);
2713         if (len < 0) {
2714                 perror("recv");
2715                 return;
2716         }
2717
2718         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2719                 printf("received invalid radiotap frame\n");
2720                 return;
2721         }
2722
2723         memset(&hfi, 0, sizeof(hfi));
2724
2725         while (1) {
2726                 ret = ieee80211_radiotap_iterator_next(&iter);
2727                 if (ret == -ENOENT)
2728                         break;
2729                 if (ret) {
2730                         printf("received invalid radiotap frame (%d)\n", ret);
2731                         return;
2732                 }
2733                 switch (iter.this_arg_index) {
2734                 case IEEE80211_RADIOTAP_FLAGS:
2735                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2736                                 len -= 4;
2737                         break;
2738                 case IEEE80211_RADIOTAP_RX_FLAGS:
2739                         rxflags = 1;
2740                         break;
2741                 case IEEE80211_RADIOTAP_TX_FLAGS:
2742                         injected = 1;
2743                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2744                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2745                         break;
2746                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2747                         break;
2748                 case IEEE80211_RADIOTAP_CHANNEL:
2749                         /* TODO convert from freq/flags to channel number
2750                         hfi.channel = XXX;
2751                          */
2752                         break;
2753                 case IEEE80211_RADIOTAP_RATE:
2754                         hfi.datarate = *iter.this_arg * 5;
2755                         break;
2756                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2757                         hfi.ssi_signal = *iter.this_arg;
2758                         break;
2759                 }
2760         }
2761
2762         if (rxflags && injected)
2763                 return;
2764
2765         if (!injected)
2766                 handle_frame(drv, buf + iter.max_length,
2767                              len - iter.max_length, &hfi);
2768         else
2769                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2770                                    len - iter.max_length, !failed);
2771 }
2772
2773
2774 /*
2775  * we post-process the filter code later and rewrite
2776  * this to the offset to the last instruction
2777  */
2778 #define PASS    0xFF
2779 #define FAIL    0xFE
2780
2781 static struct sock_filter msock_filter_insns[] = {
2782         /*
2783          * do a little-endian load of the radiotap length field
2784          */
2785         /* load lower byte into A */
2786         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2787         /* put it into X (== index register) */
2788         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2789         /* load upper byte into A */
2790         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2791         /* left-shift it by 8 */
2792         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2793         /* or with X */
2794         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2795         /* put result into X */
2796         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2797
2798         /*
2799          * Allow management frames through, this also gives us those
2800          * management frames that we sent ourselves with status
2801          */
2802         /* load the lower byte of the IEEE 802.11 frame control field */
2803         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2804         /* mask off frame type and version */
2805         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2806         /* accept frame if it's both 0, fall through otherwise */
2807         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2808
2809         /*
2810          * TODO: add a bit to radiotap RX flags that indicates
2811          * that the sending station is not associated, then
2812          * add a filter here that filters on our DA and that flag
2813          * to allow us to deauth frames to that bad station.
2814          *
2815          * Not a regression -- we didn't do it before either.
2816          */
2817
2818 #if 0
2819         /*
2820          * drop non-data frames, WDS frames
2821          */
2822         /* load the lower byte of the frame control field */
2823         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2824         /* mask off QoS bit */
2825         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2826         /* drop non-data frames */
2827         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2828         /* load the upper byte of the frame control field */
2829         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2830         /* mask off toDS/fromDS */
2831         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2832         /* drop WDS frames */
2833         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2834 #endif
2835
2836         /*
2837          * add header length to index
2838          */
2839         /* load the lower byte of the frame control field */
2840         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2841         /* mask off QoS bit */
2842         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2843         /* right shift it by 6 to give 0 or 2 */
2844         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2845         /* add data frame header length */
2846         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2847         /* add index, was start of 802.11 header */
2848         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2849         /* move to index, now start of LL header */
2850         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2851
2852         /*
2853          * Accept empty data frames, we use those for
2854          * polling activity.
2855          */
2856         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2857         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2858
2859         /*
2860          * Accept EAPOL frames
2861          */
2862         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2863         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2864         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2865         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2866
2867         /* keep these last two statements or change the code below */
2868         /* return 0 == "DROP" */
2869         BPF_STMT(BPF_RET | BPF_K, 0),
2870         /* return ~0 == "keep all" */
2871         BPF_STMT(BPF_RET | BPF_K, ~0),
2872 };
2873
2874 static struct sock_fprog msock_filter = {
2875         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2876         .filter = msock_filter_insns,
2877 };
2878
2879
2880 static int add_monitor_filter(int s)
2881 {
2882         int idx;
2883
2884         /* rewrite all PASS/FAIL jump offsets */
2885         for (idx = 0; idx < msock_filter.len; idx++) {
2886                 struct sock_filter *insn = &msock_filter_insns[idx];
2887
2888                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2889                         if (insn->code == (BPF_JMP|BPF_JA)) {
2890                                 if (insn->k == PASS)
2891                                         insn->k = msock_filter.len - idx - 2;
2892                                 else if (insn->k == FAIL)
2893                                         insn->k = msock_filter.len - idx - 3;
2894                         }
2895
2896                         if (insn->jt == PASS)
2897                                 insn->jt = msock_filter.len - idx - 2;
2898                         else if (insn->jt == FAIL)
2899                                 insn->jt = msock_filter.len - idx - 3;
2900
2901                         if (insn->jf == PASS)
2902                                 insn->jf = msock_filter.len - idx - 2;
2903                         else if (insn->jf == FAIL)
2904                                 insn->jf = msock_filter.len - idx - 3;
2905                 }
2906         }
2907
2908         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2909                        &msock_filter, sizeof(msock_filter))) {
2910                 perror("SO_ATTACH_FILTER");
2911                 return -1;
2912         }
2913
2914         return 0;
2915 }
2916
2917
2918 static void nl80211_remove_monitor_interface(
2919         struct wpa_driver_nl80211_data *drv)
2920 {
2921         if (drv->monitor_ifidx >= 0) {
2922                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2923                 drv->monitor_ifidx = -1;
2924         }
2925 }
2926
2927
2928 static int
2929 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2930 {
2931         char buf[IFNAMSIZ];
2932         struct sockaddr_ll ll;
2933         int optval;
2934         socklen_t optlen;
2935
2936         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2937         buf[IFNAMSIZ - 1] = '\0';
2938
2939         drv->monitor_ifidx =
2940                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2941
2942         if (drv->monitor_ifidx < 0)
2943                 return -1;
2944
2945         if (hostapd_set_iface_flags(drv, buf, 1))
2946                 goto error;
2947
2948         memset(&ll, 0, sizeof(ll));
2949         ll.sll_family = AF_PACKET;
2950         ll.sll_ifindex = drv->monitor_ifidx;
2951         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2952         if (drv->monitor_sock < 0) {
2953                 perror("socket[PF_PACKET,SOCK_RAW]");
2954                 goto error;
2955         }
2956
2957         if (add_monitor_filter(drv->monitor_sock)) {
2958                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2959                            "interface; do filtering in user space");
2960                 /* This works, but will cost in performance. */
2961         }
2962
2963         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2964                 perror("monitor socket bind");
2965                 goto error;
2966         }
2967
2968         optlen = sizeof(optval);
2969         optval = 20;
2970         if (setsockopt
2971             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2972                 perror("Failed to set socket priority");
2973                 goto error;
2974         }
2975
2976         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2977                                      drv, NULL)) {
2978                 printf("Could not register monitor read socket\n");
2979                 goto error;
2980         }
2981
2982         return 0;
2983  error:
2984         nl80211_remove_monitor_interface(drv);
2985         return -1;
2986 }
2987
2988
2989 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2990
2991 static int wpa_driver_nl80211_hapd_send_eapol(
2992         void *priv, const u8 *addr, const u8 *data,
2993         size_t data_len, int encrypt, const u8 *own_addr)
2994 {
2995         struct wpa_driver_nl80211_data *drv = priv;
2996         struct ieee80211_hdr *hdr;
2997         size_t len;
2998         u8 *pos;
2999         int res;
3000 #if 0 /* FIX */
3001         int qos = sta->flags & WPA_STA_WMM;
3002 #else
3003         int qos = 0;
3004 #endif
3005
3006         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3007                 data_len;
3008         hdr = os_zalloc(len);
3009         if (hdr == NULL) {
3010                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3011                        (unsigned long) len);
3012                 return -1;
3013         }
3014
3015         hdr->frame_control =
3016                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3017         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3018         if (encrypt)
3019                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3020 #if 0 /* To be enabled if qos determination is added above */
3021         if (qos) {
3022                 hdr->frame_control |=
3023                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3024         }
3025 #endif
3026
3027         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3028         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3029         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3030         pos = (u8 *) (hdr + 1);
3031
3032 #if 0 /* To be enabled if qos determination is added above */
3033         if (qos) {
3034                 /* add an empty QoS header if needed */
3035                 pos[0] = 0;
3036                 pos[1] = 0;
3037                 pos += 2;
3038         }
3039 #endif
3040
3041         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3042         pos += sizeof(rfc1042_header);
3043         WPA_PUT_BE16(pos, ETH_P_PAE);
3044         pos += 2;
3045         memcpy(pos, data, data_len);
3046
3047         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3048         if (res < 0) {
3049                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3050                            "failed: %d (%s)",
3051                            (unsigned long) len, errno, strerror(errno));
3052         }
3053         free(hdr);
3054
3055         return res;
3056 }
3057
3058
3059 static u32 sta_flags_nl80211(int flags)
3060 {
3061         u32 f = 0;
3062
3063         if (flags & WPA_STA_AUTHORIZED)
3064                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3065         if (flags & WPA_STA_WMM)
3066                 f |= BIT(NL80211_STA_FLAG_WME);
3067         if (flags & WPA_STA_SHORT_PREAMBLE)
3068                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3069         if (flags & WPA_STA_MFP)
3070                 f |= BIT(NL80211_STA_FLAG_MFP);
3071
3072         return f;
3073 }
3074
3075
3076 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3077                                             int total_flags, int flags_or,
3078                                             int flags_and)
3079 {
3080         struct wpa_driver_nl80211_data *drv = priv;
3081         struct nl_msg *msg, *flags = NULL;
3082         struct nl80211_sta_flag_update upd;
3083
3084         msg = nlmsg_alloc();
3085         if (!msg)
3086                 return -ENOMEM;
3087
3088         flags = nlmsg_alloc();
3089         if (!flags) {
3090                 nlmsg_free(msg);
3091                 return -ENOMEM;
3092         }
3093
3094         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3095                     0, NL80211_CMD_SET_STATION, 0);
3096
3097         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3098                     if_nametoindex(drv->ifname));
3099         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3100
3101         /*
3102          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3103          * can be removed eventually.
3104          */
3105         if (total_flags & WPA_STA_AUTHORIZED)
3106                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3107
3108         if (total_flags & WPA_STA_WMM)
3109                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3110
3111         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3112                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3113
3114         if (total_flags & WPA_STA_MFP)
3115                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3116
3117         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3118                 goto nla_put_failure;
3119
3120         os_memset(&upd, 0, sizeof(upd));
3121         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3122         upd.set = sta_flags_nl80211(flags_or);
3123         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3124
3125         nlmsg_free(flags);
3126
3127         return send_and_recv_msgs(drv, msg, NULL, NULL);
3128  nla_put_failure:
3129         nlmsg_free(flags);
3130         return -ENOBUFS;
3131 }
3132
3133
3134 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3135                                  struct wpa_driver_associate_params *params)
3136 {
3137         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3138             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3139                 nl80211_remove_monitor_interface(drv);
3140                 return -1;
3141         }
3142
3143         /* TODO: setup monitor interface (and add code somewhere to remove this
3144          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3145
3146         return 0;
3147 }
3148
3149
3150 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3151 {
3152         struct nl_msg *msg;
3153         int ret = -1;
3154
3155         msg = nlmsg_alloc();
3156         if (!msg)
3157                 return -1;
3158
3159         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3160                     NL80211_CMD_LEAVE_IBSS, 0);
3161         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3162         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3163         msg = NULL;
3164         if (ret) {
3165                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3166                            "(%s)", ret, strerror(-ret));
3167                 goto nla_put_failure;
3168         }
3169
3170         ret = 0;
3171         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3172
3173 nla_put_failure:
3174         nlmsg_free(msg);
3175         return ret;
3176 }
3177
3178
3179 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3180                                    struct wpa_driver_associate_params *params)
3181 {
3182         struct nl_msg *msg;
3183         int ret = -1;
3184         int count = 0;
3185
3186         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3187
3188         if (wpa_driver_nl80211_set_mode(drv, params->mode)) {
3189                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3190                            "IBSS mode");
3191                 return -1;
3192         }
3193
3194 retry:
3195         msg = nlmsg_alloc();
3196         if (!msg)
3197                 return -1;
3198
3199         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3200                     NL80211_CMD_JOIN_IBSS, 0);
3201         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3202
3203         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3204                 goto nla_put_failure;
3205
3206         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3207                           params->ssid, params->ssid_len);
3208         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3209                 params->ssid);
3210         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3211         drv->ssid_len = params->ssid_len;
3212
3213         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3214         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3215
3216         ret = nl80211_set_conn_keys(params, msg);
3217         if (ret)
3218                 goto nla_put_failure;
3219
3220         if (params->wpa_ie) {
3221                 wpa_hexdump(MSG_DEBUG,
3222                             "  * Extra IEs for Beacon/Probe Response frames",
3223                             params->wpa_ie, params->wpa_ie_len);
3224                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3225                         params->wpa_ie);
3226         }
3227
3228         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3229         msg = NULL;
3230         if (ret) {
3231                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3232                            ret, strerror(-ret));
3233                 count++;
3234                 if (ret == -EALREADY && count == 1) {
3235                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3236                                    "forced leave");
3237                         nl80211_leave_ibss(drv);
3238                         nlmsg_free(msg);
3239                         goto retry;
3240                 }
3241
3242                 goto nla_put_failure;
3243         }
3244         ret = 0;
3245         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3246
3247 nla_put_failure:
3248         nlmsg_free(msg);
3249         return ret;
3250 }
3251
3252
3253 static int wpa_driver_nl80211_connect(
3254         struct wpa_driver_nl80211_data *drv,
3255         struct wpa_driver_associate_params *params)
3256 {
3257         struct nl_msg *msg;
3258         enum nl80211_auth_type type;
3259         int ret = 0;
3260
3261         msg = nlmsg_alloc();
3262         if (!msg)
3263                 return -1;
3264
3265         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3266         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3267                     NL80211_CMD_CONNECT, 0);
3268
3269         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3270         if (params->bssid) {
3271                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3272                            MAC2STR(params->bssid));
3273                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3274         }
3275         if (params->freq) {
3276                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3277                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3278         }
3279         if (params->ssid) {
3280                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3281                                   params->ssid, params->ssid_len);
3282                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3283                         params->ssid);
3284                 if (params->ssid_len > sizeof(drv->ssid))
3285                         goto nla_put_failure;
3286                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3287                 drv->ssid_len = params->ssid_len;
3288         }
3289         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3290         if (params->wpa_ie)
3291                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3292                         params->wpa_ie);
3293
3294         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3295                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3296         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3297                 type = NL80211_AUTHTYPE_SHARED_KEY;
3298         else if (params->auth_alg & AUTH_ALG_LEAP)
3299                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3300         else if (params->auth_alg & AUTH_ALG_FT)
3301                 type = NL80211_AUTHTYPE_FT;
3302         else
3303                 goto nla_put_failure;
3304
3305         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3306         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3307
3308         if (params->wpa_ie && params->wpa_ie_len) {
3309                 enum nl80211_wpa_versions ver;
3310
3311                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3312                         ver = NL80211_WPA_VERSION_2;
3313                 else
3314                         ver = NL80211_WPA_VERSION_1;
3315
3316                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3317                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3318         }
3319
3320         if (params->pairwise_suite != CIPHER_NONE) {
3321                 int cipher;
3322
3323                 switch (params->pairwise_suite) {
3324                 case CIPHER_WEP40:
3325                         cipher = WLAN_CIPHER_SUITE_WEP40;
3326                         break;
3327                 case CIPHER_WEP104:
3328                         cipher = WLAN_CIPHER_SUITE_WEP104;
3329                         break;
3330                 case CIPHER_CCMP:
3331                         cipher = WLAN_CIPHER_SUITE_CCMP;
3332                         break;
3333                 case CIPHER_TKIP:
3334                 default:
3335                         cipher = WLAN_CIPHER_SUITE_TKIP;
3336                         break;
3337                 }
3338                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3339         }
3340
3341         if (params->group_suite != CIPHER_NONE) {
3342                 int cipher;
3343
3344                 switch (params->group_suite) {
3345                 case CIPHER_WEP40:
3346                         cipher = WLAN_CIPHER_SUITE_WEP40;
3347                         break;
3348                 case CIPHER_WEP104:
3349                         cipher = WLAN_CIPHER_SUITE_WEP104;
3350                         break;
3351                 case CIPHER_CCMP:
3352                         cipher = WLAN_CIPHER_SUITE_CCMP;
3353                         break;
3354                 case CIPHER_TKIP:
3355                 default:
3356                         cipher = WLAN_CIPHER_SUITE_TKIP;
3357                         break;
3358                 }
3359                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3360         }
3361
3362         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3363             params->key_mgmt_suite == KEY_MGMT_PSK) {
3364                 int mgmt = WLAN_AKM_SUITE_PSK;
3365
3366                 switch (params->key_mgmt_suite) {
3367                 case KEY_MGMT_802_1X:
3368                         mgmt = WLAN_AKM_SUITE_8021X;
3369                         break;
3370                 case KEY_MGMT_PSK:
3371                 default:
3372                         mgmt = WLAN_AKM_SUITE_PSK;
3373                         break;
3374                 }
3375                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3376         }
3377
3378         ret = nl80211_set_conn_keys(params, msg);
3379         if (ret)
3380                 goto nla_put_failure;
3381
3382         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3383         msg = NULL;
3384         if (ret) {
3385                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3386                            "(%s)", ret, strerror(-ret));
3387                 goto nla_put_failure;
3388         }
3389         ret = 0;
3390         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3391
3392 nla_put_failure:
3393         nlmsg_free(msg);
3394         return ret;
3395
3396 }
3397
3398
3399 static int wpa_driver_nl80211_associate(
3400         void *priv, struct wpa_driver_associate_params *params)
3401 {
3402         struct wpa_driver_nl80211_data *drv = priv;
3403         int ret = -1;
3404         struct nl_msg *msg;
3405
3406         if (params->mode == IEEE80211_MODE_AP)
3407                 return wpa_driver_nl80211_ap(drv, params);
3408
3409         if (params->mode == IEEE80211_MODE_IBSS)
3410                 return wpa_driver_nl80211_ibss(drv, params);
3411
3412         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3413                 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3414                         return -1;
3415                 return wpa_driver_nl80211_connect(drv, params);
3416         }
3417
3418         drv->associated = 0;
3419
3420         msg = nlmsg_alloc();
3421         if (!msg)
3422                 return -1;
3423
3424         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3425                    drv->ifindex);
3426         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3427                     NL80211_CMD_ASSOCIATE, 0);
3428
3429         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3430         if (params->bssid) {
3431                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3432                            MAC2STR(params->bssid));
3433                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3434         }
3435         if (params->freq) {
3436                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3437                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3438         }
3439         if (params->ssid) {
3440                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3441                                   params->ssid, params->ssid_len);
3442                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3443                         params->ssid);
3444                 if (params->ssid_len > sizeof(drv->ssid))
3445                         goto nla_put_failure;
3446                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3447                 drv->ssid_len = params->ssid_len;
3448         }
3449         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3450         if (params->wpa_ie)
3451                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3452                         params->wpa_ie);
3453
3454 #ifdef CONFIG_IEEE80211W
3455         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3456                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3457 #endif /* CONFIG_IEEE80211W */
3458
3459         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3460
3461         if (params->prev_bssid) {
3462                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3463                            MAC2STR(params->prev_bssid));
3464                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3465                         params->prev_bssid);
3466         }
3467
3468         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3469         msg = NULL;
3470         if (ret) {
3471                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3472                            "(%s)", ret, strerror(-ret));
3473                 goto nla_put_failure;
3474         }
3475         ret = 0;
3476         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3477                    "successfully");
3478
3479 nla_put_failure:
3480         nlmsg_free(msg);
3481         return ret;
3482 }
3483
3484
3485 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3486                             int ifindex, int mode)
3487 {
3488         struct nl_msg *msg;
3489         int ret = -ENOBUFS;
3490
3491         msg = nlmsg_alloc();
3492         if (!msg)
3493                 return -ENOMEM;
3494
3495         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3496                     0, NL80211_CMD_SET_INTERFACE, 0);
3497         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3498         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3499
3500         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3501         if (!ret)
3502                 return 0;
3503 nla_put_failure:
3504         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3505                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3506         return ret;
3507 }
3508
3509
3510 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3511 {
3512         struct wpa_driver_nl80211_data *drv = priv;
3513         int ret = -1;
3514         int nlmode;
3515
3516         switch (mode) {
3517         case 0:
3518                 nlmode = NL80211_IFTYPE_STATION;
3519                 break;
3520         case 1:
3521                 nlmode = NL80211_IFTYPE_ADHOC;
3522                 break;
3523         case 2:
3524                 nlmode = NL80211_IFTYPE_AP;
3525                 break;
3526         default:
3527                 return -1;
3528         }
3529
3530         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3531                 drv->nlmode = nlmode;
3532                 ret = 0;
3533                 goto done;
3534         }
3535
3536         if (nlmode == drv->nlmode) {
3537                 ret = 0;
3538                 goto done; /* Already in the requested mode */
3539         }
3540
3541         /* mac80211 doesn't allow mode changes while the device is up, so
3542          * take the device down, try to set the mode again, and bring the
3543          * device back up.
3544          */
3545         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3546                 /* Try to set the mode again while the interface is down */
3547                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3548                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3549                         ret = -1;
3550         }
3551
3552         if (!ret)
3553                 drv->nlmode = nlmode;
3554
3555 done:
3556         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3557                 /* Setup additional AP mode functionality if needed */
3558                 if (drv->monitor_ifidx < 0 &&
3559                     nl80211_create_monitor_interface(drv))
3560                         return -1;
3561         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3562                 /* Remove additional AP mode functionality */
3563                 nl80211_remove_monitor_interface(drv);
3564         }
3565
3566         return ret;
3567 }
3568
3569
3570 static int wpa_driver_nl80211_get_capa(void *priv,
3571                                        struct wpa_driver_capa *capa)
3572 {
3573         struct wpa_driver_nl80211_data *drv = priv;
3574         if (!drv->has_capability)
3575                 return -1;
3576         os_memcpy(capa, &drv->capa, sizeof(*capa));
3577         return 0;
3578 }
3579
3580
3581 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3582 {
3583         struct wpa_driver_nl80211_data *drv = priv;
3584
3585         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3586                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3587         drv->operstate = state;
3588         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
3589                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
3590 }
3591
3592
3593 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3594 {
3595         struct wpa_driver_nl80211_data *drv = priv;
3596         struct nl_msg *msg;
3597         struct nl80211_sta_flag_update upd;
3598
3599         msg = nlmsg_alloc();
3600         if (!msg)
3601                 return -ENOMEM;
3602
3603         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3604                     0, NL80211_CMD_SET_STATION, 0);
3605
3606         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3607                     if_nametoindex(drv->ifname));
3608         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3609
3610         os_memset(&upd, 0, sizeof(upd));
3611         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3612         if (authorized)
3613                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3614         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3615
3616         return send_and_recv_msgs(drv, msg, NULL, NULL);
3617  nla_put_failure:
3618         return -ENOBUFS;
3619 }
3620
3621
3622 #ifdef HOSTAPD
3623
3624 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3625                                  int ifindex)
3626 {
3627         struct i802_bss *bss = &drv->bss;
3628         while (bss) {
3629                 if (ifindex == bss->ifindex)
3630                         return bss;
3631                 bss = bss->next;
3632         }
3633         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3634         return NULL;
3635 }
3636
3637
3638 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3639 {
3640         int i;
3641         int *old;
3642
3643         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3644                    ifidx);
3645         for (i = 0; i < drv->num_if_indices; i++) {
3646                 if (drv->if_indices[i] == 0) {
3647                         drv->if_indices[i] = ifidx;
3648                         return;
3649                 }
3650         }
3651
3652         if (drv->if_indices != drv->default_if_indices)
3653                 old = drv->if_indices;
3654         else
3655                 old = NULL;
3656
3657         drv->if_indices = realloc(old,
3658                                   sizeof(int) * (drv->num_if_indices + 1));
3659         if (!drv->if_indices) {
3660                 if (!old)
3661                         drv->if_indices = drv->default_if_indices;
3662                 else
3663                         drv->if_indices = old;
3664                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3665                            "interfaces");
3666                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3667                 return;
3668         }
3669         drv->if_indices[drv->num_if_indices] = ifidx;
3670         drv->num_if_indices++;
3671 }
3672
3673
3674 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3675 {
3676         int i;
3677
3678         for (i = 0; i < drv->num_if_indices; i++) {
3679                 if (drv->if_indices[i] == ifidx) {
3680                         drv->if_indices[i] = 0;
3681                         break;
3682                 }
3683         }
3684 }
3685
3686
3687 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3688 {
3689         int i;
3690
3691         for (i = 0; i < drv->num_if_indices; i++)
3692                 if (drv->if_indices[i] == ifidx)
3693                         return 1;
3694
3695         return 0;
3696 }
3697
3698
3699 static inline int min_int(int a, int b)
3700 {
3701         if (a < b)
3702                 return a;
3703         return b;
3704 }
3705
3706
3707 static int get_key_handler(struct nl_msg *msg, void *arg)
3708 {
3709         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3710         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3711
3712         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3713                   genlmsg_attrlen(gnlh, 0), NULL);
3714
3715         /*
3716          * TODO: validate the key index and mac address!
3717          * Otherwise, there's a race condition as soon as
3718          * the kernel starts sending key notifications.
3719          */
3720
3721         if (tb[NL80211_ATTR_KEY_SEQ])
3722                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3723                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3724         return NL_SKIP;
3725 }
3726
3727
3728 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3729                            int idx, u8 *seq)
3730 {
3731         struct wpa_driver_nl80211_data *drv = priv;
3732         struct nl_msg *msg;
3733
3734         msg = nlmsg_alloc();
3735         if (!msg)
3736                 return -ENOMEM;
3737
3738         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3739                     0, NL80211_CMD_GET_KEY, 0);
3740
3741         if (addr)
3742                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3743         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3744         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3745
3746         memset(seq, 0, 6);
3747
3748         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3749  nla_put_failure:
3750         return -ENOBUFS;
3751 }
3752
3753
3754 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3755                               int mode)
3756 {
3757         struct wpa_driver_nl80211_data *drv = priv;
3758         struct nl_msg *msg;
3759         u8 rates[NL80211_MAX_SUPP_RATES];
3760         u8 rates_len = 0;
3761         int i;
3762
3763         msg = nlmsg_alloc();
3764         if (!msg)
3765                 return -ENOMEM;
3766
3767         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3768                     NL80211_CMD_SET_BSS, 0);
3769
3770         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3771                 rates[rates_len++] = basic_rates[i] / 5;
3772
3773         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3774
3775         /* TODO: multi-BSS support */
3776         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3777
3778         return send_and_recv_msgs(drv, msg, NULL, NULL);
3779  nla_put_failure:
3780         return -ENOBUFS;
3781 }
3782
3783
3784 /* Set kernel driver on given frequency (MHz) */
3785 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3786 {
3787         struct wpa_driver_nl80211_data *drv = priv;
3788         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3789                                            freq->sec_channel_offset);
3790 }
3791
3792
3793 static int i802_set_rts(void *priv, int rts)
3794 {
3795         struct wpa_driver_nl80211_data *drv = priv;
3796         struct nl_msg *msg;
3797         int ret = -ENOBUFS;
3798         u32 val;
3799
3800         msg = nlmsg_alloc();
3801         if (!msg)
3802                 return -ENOMEM;
3803
3804         if (rts >= 2347)
3805                 val = (u32) -1;
3806         else
3807                 val = rts;
3808
3809         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3810                     0, NL80211_CMD_SET_WIPHY, 0);
3811         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3812         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3813
3814         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3815         if (!ret)
3816                 return 0;
3817 nla_put_failure:
3818         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3819                    "%d (%s)", rts, ret, strerror(-ret));
3820         return ret;
3821 }
3822
3823
3824 static int i802_set_frag(void *priv, int frag)
3825 {
3826         struct wpa_driver_nl80211_data *drv = priv;
3827         struct nl_msg *msg;
3828         int ret = -ENOBUFS;
3829         u32 val;
3830
3831         msg = nlmsg_alloc();
3832         if (!msg)
3833                 return -ENOMEM;
3834
3835         if (frag >= 2346)
3836                 val = (u32) -1;
3837         else
3838                 val = frag;
3839
3840         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3841                     0, NL80211_CMD_SET_WIPHY, 0);
3842         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3843         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3844
3845         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3846         if (!ret)
3847                 return 0;
3848 nla_put_failure:
3849         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3850                    "%d: %d (%s)", frag, ret, strerror(-ret));
3851         return ret;
3852 }
3853
3854
3855 static int i802_flush(void *priv)
3856 {
3857         struct wpa_driver_nl80211_data *drv = priv;
3858         struct nl_msg *msg;
3859
3860         msg = nlmsg_alloc();
3861         if (!msg)
3862                 return -1;
3863
3864         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3865                     0, NL80211_CMD_DEL_STATION, 0);
3866
3867         /*
3868          * XXX: FIX! this needs to flush all VLANs too
3869          */
3870         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3871                     if_nametoindex(drv->ifname));
3872
3873         return send_and_recv_msgs(drv, msg, NULL, NULL);
3874  nla_put_failure:
3875         return -ENOBUFS;
3876 }
3877
3878
3879 static int get_sta_handler(struct nl_msg *msg, void *arg)
3880 {
3881         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3882         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3883         struct hostap_sta_driver_data *data = arg;
3884         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3885         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3886                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3887                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3888                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3889                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3890                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3891         };
3892
3893         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3894                   genlmsg_attrlen(gnlh, 0), NULL);
3895
3896         /*
3897          * TODO: validate the interface and mac address!
3898          * Otherwise, there's a race condition as soon as
3899          * the kernel starts sending station notifications.
3900          */
3901
3902         if (!tb[NL80211_ATTR_STA_INFO]) {
3903                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3904                 return NL_SKIP;
3905         }
3906         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3907                              tb[NL80211_ATTR_STA_INFO],
3908                              stats_policy)) {
3909                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3910                 return NL_SKIP;
3911         }
3912
3913         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3914                 data->inactive_msec =
3915                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3916         if (stats[NL80211_STA_INFO_RX_BYTES])
3917                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3918         if (stats[NL80211_STA_INFO_TX_BYTES])
3919                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3920         if (stats[NL80211_STA_INFO_RX_PACKETS])
3921                 data->rx_packets =
3922                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3923         if (stats[NL80211_STA_INFO_TX_PACKETS])
3924                 data->tx_packets =
3925                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3926
3927         return NL_SKIP;
3928 }
3929
3930 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3931                               const u8 *addr)
3932 {
3933         struct wpa_driver_nl80211_data *drv = priv;
3934         struct nl_msg *msg;
3935
3936         os_memset(data, 0, sizeof(*data));
3937         msg = nlmsg_alloc();
3938         if (!msg)
3939                 return -ENOMEM;
3940
3941         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3942                     0, NL80211_CMD_GET_STATION, 0);
3943
3944         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3945         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3946
3947         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3948  nla_put_failure:
3949         return -ENOBUFS;
3950 }
3951
3952
3953 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3954                                     int cw_min, int cw_max, int burst_time)
3955 {
3956         struct wpa_driver_nl80211_data *drv = priv;
3957         struct nl_msg *msg;
3958         struct nlattr *txq, *params;
3959
3960         msg = nlmsg_alloc();
3961         if (!msg)
3962                 return -1;
3963
3964         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3965                     0, NL80211_CMD_SET_WIPHY, 0);
3966
3967         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3968
3969         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3970         if (!txq)
3971                 goto nla_put_failure;
3972
3973         /* We are only sending parameters for a single TXQ at a time */
3974         params = nla_nest_start(msg, 1);
3975         if (!params)
3976                 goto nla_put_failure;
3977
3978         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3979         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3980          * 32 usec, so need to convert the value here. */
3981         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3982         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3983         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3984         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3985
3986         nla_nest_end(msg, params);
3987
3988         nla_nest_end(msg, txq);
3989
3990         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3991                 return 0;
3992  nla_put_failure:
3993         return -1;
3994 }
3995
3996
3997 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3998 {
3999         struct wpa_driver_nl80211_data *drv = priv;
4000         struct nl_msg *msg;
4001
4002         msg = nlmsg_alloc();
4003         if (!msg)
4004                 return -ENOMEM;
4005
4006         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4007                     NL80211_CMD_SET_BSS, 0);
4008
4009         if (cts >= 0)
4010                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4011         if (preamble >= 0)
4012                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4013         if (slot >= 0)
4014                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4015
4016         /* TODO: multi-BSS support */
4017         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4018
4019         return send_and_recv_msgs(drv, msg, NULL, NULL);
4020  nla_put_failure:
4021         return -ENOBUFS;
4022 }
4023
4024
4025 static int i802_set_cts_protect(void *priv, int value)
4026 {
4027         return i802_set_bss(priv, value, -1, -1);
4028 }
4029
4030
4031 static int i802_set_preamble(void *priv, int value)
4032 {
4033         return i802_set_bss(priv, -1, value, -1);
4034 }
4035
4036
4037 static int i802_set_short_slot_time(void *priv, int value)
4038 {
4039         return i802_set_bss(priv, -1, -1, value);
4040 }
4041
4042
4043 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4044                              const char *ifname, int vlan_id)
4045 {
4046         struct wpa_driver_nl80211_data *drv = priv;
4047         struct nl_msg *msg;
4048
4049         msg = nlmsg_alloc();
4050         if (!msg)
4051                 return -ENOMEM;
4052
4053         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4054                     0, NL80211_CMD_SET_STATION, 0);
4055
4056         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4057                     if_nametoindex(drv->ifname));
4058         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4059         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4060                     if_nametoindex(ifname));
4061
4062         return send_and_recv_msgs(drv, msg, NULL, NULL);
4063  nla_put_failure:
4064         return -ENOBUFS;
4065 }
4066
4067
4068 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4069 {
4070         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4071         struct sockaddr_ll lladdr;
4072         unsigned char buf[3000];
4073         int len;
4074         socklen_t fromlen = sizeof(lladdr);
4075
4076         len = recvfrom(sock, buf, sizeof(buf), 0,
4077                        (struct sockaddr *)&lladdr, &fromlen);
4078         if (len < 0) {
4079                 perror("recv");
4080                 return;
4081         }
4082
4083         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4084                 void *ctx;
4085                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4086                 if (!ctx)
4087                         return;
4088                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4089         }
4090 }
4091
4092
4093 static int i802_get_inact_sec(void *priv, const u8 *addr)
4094 {
4095         struct hostap_sta_driver_data data;
4096         int ret;
4097
4098         data.inactive_msec = (unsigned long) -1;
4099         ret = i802_read_sta_data(priv, &data, addr);
4100         if (ret || data.inactive_msec == (unsigned long) -1)
4101                 return -1;
4102         return data.inactive_msec / 1000;
4103 }
4104
4105
4106 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4107 {
4108 #if 0
4109         /* TODO */
4110 #endif
4111         return 0;
4112 }
4113
4114
4115 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4116                            int reason)
4117 {
4118         struct wpa_driver_nl80211_data *drv = priv;
4119         struct ieee80211_mgmt mgmt;
4120
4121         memset(&mgmt, 0, sizeof(mgmt));
4122         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4123                                           WLAN_FC_STYPE_DEAUTH);
4124         memcpy(mgmt.da, addr, ETH_ALEN);
4125         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4126         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4127         mgmt.u.deauth.reason_code = host_to_le16(reason);
4128         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4129                                             IEEE80211_HDRLEN +
4130                                             sizeof(mgmt.u.deauth));
4131 }
4132
4133
4134 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4135                              int reason)
4136 {
4137         struct wpa_driver_nl80211_data *drv = priv;
4138         struct ieee80211_mgmt mgmt;
4139
4140         memset(&mgmt, 0, sizeof(mgmt));
4141         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4142                                           WLAN_FC_STYPE_DISASSOC);
4143         memcpy(mgmt.da, addr, ETH_ALEN);
4144         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4145         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4146         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4147         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4148                                             IEEE80211_HDRLEN +
4149                                             sizeof(mgmt.u.disassoc));
4150 }
4151
4152
4153 static void *i802_init(struct hostapd_data *hapd,
4154                        struct wpa_init_params *params)
4155 {
4156         struct wpa_driver_nl80211_data *drv;
4157         size_t i;
4158
4159         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4160         if (drv == NULL)
4161                 return NULL;
4162
4163         drv->bss.ifindex = drv->ifindex;
4164
4165         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4166         drv->if_indices = drv->default_if_indices;
4167         for (i = 0; i < params->num_bridge; i++) {
4168                 if (params->bridge[i])
4169                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4170         }
4171
4172         /* start listening for EAPOL on the default AP interface */
4173         add_ifidx(drv, drv->ifindex);
4174
4175         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4176                 goto failed;
4177
4178         if (params->bssid) {
4179                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4180                         goto failed;
4181         }
4182
4183         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
4184                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4185                            "into AP mode", drv->ifname);
4186                 goto failed;
4187         }
4188
4189         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4190                 goto failed;
4191
4192         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4193         if (drv->eapol_sock < 0) {
4194                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4195                 goto failed;
4196         }
4197
4198         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4199         {
4200                 printf("Could not register read socket for eapol\n");
4201                 goto failed;
4202         }
4203
4204         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4205                 goto failed;
4206
4207         return drv;
4208
4209 failed:
4210         nl80211_remove_monitor_interface(drv);
4211         if (drv->ioctl_sock >= 0)
4212                 close(drv->ioctl_sock);
4213
4214         genl_family_put(drv->nl80211);
4215         nl_cache_free(drv->nl_cache);
4216         nl_handle_destroy(drv->nl_handle);
4217         nl_cb_put(drv->nl_cb);
4218
4219         os_free(drv);
4220         return NULL;
4221 }
4222
4223
4224 static void i802_deinit(void *priv)
4225 {
4226         wpa_driver_nl80211_deinit(priv);
4227 }
4228
4229 #endif /* HOSTAPD */
4230
4231
4232 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4233         enum wpa_driver_if_type type)
4234 {
4235         switch (type) {
4236         case WPA_IF_STATION:
4237                 return NL80211_IFTYPE_STATION;
4238         case WPA_IF_AP_VLAN:
4239                 return NL80211_IFTYPE_AP_VLAN;
4240         case WPA_IF_AP_BSS:
4241                 return NL80211_IFTYPE_AP;
4242         }
4243         return -1;
4244 }
4245
4246
4247 static int wpa_driver_nl80211_if_add(const char *iface, void *priv,
4248                                      enum wpa_driver_if_type type,
4249                                      const char *ifname, const u8 *addr,
4250                                      void *bss_ctx)
4251 {
4252         struct wpa_driver_nl80211_data *drv = priv;
4253         int ifidx;
4254 #ifdef HOSTAPD
4255         struct i802_bss *bss = NULL;
4256
4257         if (type == WPA_IF_AP_BSS) {
4258                 bss = os_zalloc(sizeof(*bss));
4259                 if (bss == NULL)
4260                         return -1;
4261         }
4262 #endif /* HOSTAPD */
4263
4264         ifidx = nl80211_create_iface(drv, ifname,
4265                                      wpa_driver_nl80211_if_type(type), addr);
4266         if (ifidx < 0) {
4267 #ifdef HOSTAPD
4268                 os_free(bss);
4269 #endif /* HOSTAPD */
4270                 return -1;
4271         }
4272
4273 #ifdef HOSTAPD
4274         if (type == WPA_IF_AP_BSS) {
4275                 if (hostapd_set_iface_flags(priv, ifname, 1)) {
4276                         nl80211_remove_iface(priv, ifidx);
4277                         os_free(bss);
4278                         return -1;
4279                 }
4280                 bss->ifindex = ifidx;
4281                 bss->next = drv->bss.next;
4282                 drv->bss.next = bss;
4283         }
4284 #endif /* HOSTAPD */
4285
4286         return 0;
4287 }
4288
4289
4290 static int wpa_driver_nl80211_if_remove(void *priv,
4291                                         enum wpa_driver_if_type type,
4292                                         const char *ifname)
4293 {
4294         struct wpa_driver_nl80211_data *drv = priv;
4295         int ifindex = if_nametoindex(ifname);
4296
4297         nl80211_remove_iface(drv, ifindex);
4298
4299 #ifdef HOSTAPD
4300         if (type == WPA_IF_AP_BSS) {
4301                 struct i802_bss *bss, *prev;
4302                 prev = &drv->bss;
4303                 bss = drv->bss.next;
4304                 while (bss) {
4305                         if (ifindex == bss->ifindex) {
4306                                 prev->next = bss->next;
4307                                 os_free(bss);
4308                                 break;
4309                         }
4310                         prev = bss;
4311                         bss = bss->next;
4312                 }
4313         }
4314 #endif /* HOSTAPD */
4315
4316         return 0;
4317 }
4318
4319
4320 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4321         .name = "nl80211",
4322         .desc = "Linux nl80211/cfg80211",
4323         .get_bssid = wpa_driver_nl80211_get_bssid,
4324         .get_ssid = wpa_driver_nl80211_get_ssid,
4325         .set_key = wpa_driver_nl80211_set_key,
4326         .scan2 = wpa_driver_nl80211_scan,
4327         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4328         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4329         .disassociate = wpa_driver_nl80211_disassociate,
4330         .authenticate = wpa_driver_nl80211_authenticate,
4331         .associate = wpa_driver_nl80211_associate,
4332         .init = wpa_driver_nl80211_init,
4333         .deinit = wpa_driver_nl80211_deinit,
4334         .get_capa = wpa_driver_nl80211_get_capa,
4335         .set_operstate = wpa_driver_nl80211_set_operstate,
4336         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4337         .set_country = wpa_driver_nl80211_set_country,
4338         .set_beacon = wpa_driver_nl80211_set_beacon,
4339         .if_add = wpa_driver_nl80211_if_add,
4340         .if_remove = wpa_driver_nl80211_if_remove,
4341         .send_mlme = wpa_driver_nl80211_send_mlme,
4342         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4343         .sta_add = wpa_driver_nl80211_sta_add,
4344         .sta_remove = wpa_driver_nl80211_sta_remove,
4345         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4346         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4347 #ifdef HOSTAPD
4348         .hapd_init = i802_init,
4349         .hapd_deinit = i802_deinit,
4350         .get_seqnum = i802_get_seqnum,
4351         .flush = i802_flush,
4352         .read_sta_data = i802_read_sta_data,
4353         .sta_deauth = i802_sta_deauth,
4354         .sta_disassoc = i802_sta_disassoc,
4355         .get_inact_sec = i802_get_inact_sec,
4356         .sta_clear_stats = i802_sta_clear_stats,
4357         .set_freq = i802_set_freq,
4358         .set_rts = i802_set_rts,
4359         .set_frag = i802_set_frag,
4360         .set_rate_sets = i802_set_rate_sets,
4361         .set_cts_protect = i802_set_cts_protect,
4362         .set_preamble = i802_set_preamble,
4363         .set_short_slot_time = i802_set_short_slot_time,
4364         .set_tx_queue_params = i802_set_tx_queue_params,
4365         .set_sta_vlan = i802_set_sta_vlan,
4366 #endif /* HOSTAPD */
4367 };