src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2010, 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         unsigned int assoc_freq;
  95
  96         int monitor_sock;
  97         int monitor_ifidx;
  98
  99         unsigned int beacon_set:1;
 100
 101 #ifdef HOSTAPD
 102         int eapol_sock; /* socket for EAPOL frames */
 103
 104         int default_if_indices[16];
 105         int *if_indices;
 106         int num_if_indices;
 107
 108         struct i802_bss bss;
 109
 110         int last_freq;
 111         int last_freq_ht;
 112 #endif /* HOSTAPD */
 113 };
 114
 115
 116 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 117                                             void *timeout_ctx);
 118 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 119 static int
 120 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 121 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 122                                    const u8 *addr, int cmd, u16 reason_code);
 123 static void nl80211_remove_monitor_interface(
 124         struct wpa_driver_nl80211_data *drv);
 125
 126 #ifdef HOSTAPD
 127 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 128 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 129 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 130                                  int ifindex);
 131 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 132 static int wpa_driver_nl80211_if_remove(void *priv,
 133                                         enum wpa_driver_if_type type,
 134                                         const char *ifname);
 135 #endif /* HOSTAPD */
 136
 137
 138 /* nl80211 code */
 139 static int ack_handler(struct nl_msg *msg, void *arg)
 140 {
 141         int *err = arg;
 142         *err = 0;
 143         return NL_STOP;
 144 }
 145
 146 static int finish_handler(struct nl_msg *msg, void *arg)
 147 {
 148         int *ret = arg;
 149         *ret = 0;
 150         return NL_SKIP;
 151 }
 152
 153 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 154                          void *arg)
 155 {
 156         int *ret = arg;
 157         *ret = err->error;
 158         return NL_SKIP;
 159 }
 160
 161
 162 static int no_seq_check(struct nl_msg *msg, void *arg)
 163 {
 164         return NL_OK;
 165 }
 166
 167
 168 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 169                               struct nl_msg *msg,
 170                               int (*valid_handler)(struct nl_msg *, void *),
 171                               void *valid_data)
 172 {
 173         struct nl_cb *cb;
 174         int err = -ENOMEM;
 175
 176         cb = nl_cb_clone(drv->nl_cb);
 177         if (!cb)
 178                 goto out;
 179
 180         err = nl_send_auto_complete(drv->nl_handle, msg);
 181         if (err < 0)
 182                 goto out;
 183
 184         err = 1;
 185
 186         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 187         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 188         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 189
 190         if (valid_handler)
 191                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 192                           valid_handler, valid_data);
 193
 194         while (err > 0)
 195                 nl_recvmsgs(drv->nl_handle, cb);
 196  out:
 197         nl_cb_put(cb);
 198         nlmsg_free(msg);
 199         return err;
 200 }
 201
 202
 203 struct family_data {
 204         const char *group;
 205         int id;
 206 };
 207
 208
 209 static int family_handler(struct nl_msg *msg, void *arg)
 210 {
 211         struct family_data *res = arg;
 212         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 213         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 214         struct nlattr *mcgrp;
 215         int i;
 216
 217         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 218                   genlmsg_attrlen(gnlh, 0), NULL);
 219         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 220                 return NL_SKIP;
 221
 222         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 223                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 224                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 225                           nla_len(mcgrp), NULL);
 226                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 227                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 228                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 229                                res->group,
 230                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 231                         continue;
 232                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 233                 break;
 234         };
 235
 236         return NL_SKIP;
 237 }
 238
 239
 240 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 241                                const char *family, const char *group)
 242 {
 243         struct nl_msg *msg;
 244         int ret = -1;
 245         struct family_data res = { group, -ENOENT };
 246
 247         msg = nlmsg_alloc();
 248         if (!msg)
 249                 return -ENOMEM;
 250         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 251                     0, 0, CTRL_CMD_GETFAMILY, 0);
 252         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 253
 254         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 255         msg = NULL;
 256         if (ret == 0)
 257                 ret = res.id;
 258
 259 nla_put_failure:
 260         nlmsg_free(msg);
 261         return ret;
 262 }
 263
 264
 265 #ifdef HOSTAPD
 266 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 267                         const char *ifname, u8 *addr)
 268 {
 269         struct ifreq ifr;
 270
 271         os_memset(&ifr, 0, sizeof(ifr));
 272         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 273         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 274                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 275                            ifname, errno, strerror(errno));
 276                 return -1;
 277         }
 278
 279         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 280                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 281                            ifname, ifr.ifr_hwaddr.sa_family);
 282                 return -1;
 283         }
 284         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 285
 286         return 0;
 287 }
 288
 289
 290 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 291                         const char *ifname, const u8 *addr)
 292 {
 293         struct ifreq ifr;
 294
 295         os_memset(&ifr, 0, sizeof(ifr));
 296         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 297         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 298         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 299
 300         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 301                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 302                            ifname, errno, strerror(errno));
 303                 return -1;
 304         }
 305
 306         return 0;
 307 }
 308 #endif /* HOSTAPD */
 309
 310
 311 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 312 {
 313         struct wpa_driver_nl80211_data *drv = priv;
 314         if (!drv->associated)
 315                 return -1;
 316         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 317         return 0;
 318 }
 319
 320
 321 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 322 {
 323         struct wpa_driver_nl80211_data *drv = priv;
 324         if (!drv->associated)
 325                 return -1;
 326         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 327         return drv->ssid_len;
 328 }
 329
 330
 331 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 332                                           char *buf, size_t len, int del)
 333 {
 334         union wpa_event_data event;
 335
 336         os_memset(&event, 0, sizeof(event));
 337         if (len > sizeof(event.interface_status.ifname))
 338                 len = sizeof(event.interface_status.ifname) - 1;
 339         os_memcpy(event.interface_status.ifname, buf, len);
 340         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 341                 EVENT_INTERFACE_ADDED;
 342
 343         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 344                    del ? "DEL" : "NEW",
 345                    event.interface_status.ifname,
 346                    del ? "removed" : "added");
 347
 348         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 349                 if (del)
 350                         drv->if_removed = 1;
 351                 else
 352                         drv->if_removed = 0;
 353         }
 354
 355         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 356 }
 357
 358
 359 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 360                                          u8 *buf, size_t len)
 361 {
 362         int attrlen, rta_len;
 363         struct rtattr *attr;
 364
 365         attrlen = len;
 366         attr = (struct rtattr *) buf;
 367
 368         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 369         while (RTA_OK(attr, attrlen)) {
 370                 if (attr->rta_type == IFLA_IFNAME) {
 371                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 372                             == 0)
 373                                 return 1;
 374                         else
 375                                 break;
 376                 }
 377                 attr = RTA_NEXT(attr, attrlen);
 378         }
 379
 380         return 0;
 381 }
 382
 383
 384 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 385                                           int ifindex, u8 *buf, size_t len)
 386 {
 387         if (drv->ifindex == ifindex)
 388                 return 1;
 389
 390         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 391                 drv->ifindex = if_nametoindex(drv->ifname);
 392                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 393                            "interface");
 394                 wpa_driver_nl80211_finish_drv_init(drv);
 395                 return 1;
 396         }
 397
 398         return 0;
 399 }
 400
 401
 402 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
 403                                                  struct ifinfomsg *ifi,
 404                                                  u8 *buf, size_t len)
 405 {
 406         struct wpa_driver_nl80211_data *drv = ctx;
 407         int attrlen, rta_len;
 408         struct rtattr *attr;
 409
 410         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len)) {
 411                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 412                            ifi->ifi_index);
 413                 return;
 414         }
 415
 416         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 417                    "(%s%s%s%s)",
 418                    drv->operstate, ifi->ifi_flags,
 419                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 420                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 421                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 422                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 423         /*
 424          * Some drivers send the association event before the operup event--in
 425          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 426          * fails. This will hit us when wpa_supplicant does not need to do
 427          * IEEE 802.1X authentication
 428          */
 429         if (drv->operstate == 1 &&
 430             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 431             !(ifi->ifi_flags & IFF_RUNNING))
 432                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 433                                        -1, IF_OPER_UP);
 434
 435         attrlen = len;
 436         attr = (struct rtattr *) buf;
 437         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 438         while (RTA_OK(attr, attrlen)) {
 439                 if (attr->rta_type == IFLA_IFNAME) {
 440                         wpa_driver_nl80211_event_link(
 441                                 drv,
 442                                 ((char *) attr) + rta_len,
 443                                 attr->rta_len - rta_len, 0);
 444                 }
 445                 attr = RTA_NEXT(attr, attrlen);
 446         }
 447 }
 448
 449
 450 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
 451                                                  struct ifinfomsg *ifi,
 452                                                  u8 *buf, size_t len)
 453 {
 454         struct wpa_driver_nl80211_data *drv = ctx;
 455         int attrlen, rta_len;
 456         struct rtattr *attr;
 457
 458         attrlen = len;
 459         attr = (struct rtattr *) buf;
 460
 461         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 462         while (RTA_OK(attr, attrlen)) {
 463                 if (attr->rta_type == IFLA_IFNAME) {
 464                         wpa_driver_nl80211_event_link(
 465                                 drv,
 466                                 ((char *) attr) + rta_len,
 467                                 attr->rta_len - rta_len, 1);
 468                 }
 469                 attr = RTA_NEXT(attr, attrlen);
 470         }
 471 }
 472
 473
 474 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 475                             const u8 *frame, size_t len)
 476 {
 477         const struct ieee80211_mgmt *mgmt;
 478         union wpa_event_data event;
 479
 480         mgmt = (const struct ieee80211_mgmt *) frame;
 481         if (len < 24 + sizeof(mgmt->u.auth)) {
 482                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 483                            "frame");
 484                 return;
 485         }
 486
 487         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 488         os_memset(&event, 0, sizeof(event));
 489         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 490         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 491         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 492         if (len > 24 + sizeof(mgmt->u.auth)) {
 493                 event.auth.ies = mgmt->u.auth.variable;
 494                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 495         }
 496
 497         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 498 }
 499
 500
 501 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 502                             const u8 *frame, size_t len)
 503 {
 504         const struct ieee80211_mgmt *mgmt;
 505         union wpa_event_data event;
 506         u16 status;
 507
 508         mgmt = (const struct ieee80211_mgmt *) frame;
 509         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 510                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 511                            "frame");
 512                 return;
 513         }
 514
 515         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 516         if (status != WLAN_STATUS_SUCCESS) {
 517                 os_memset(&event, 0, sizeof(event));
 518                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 519                         event.assoc_reject.resp_ies =
 520                                 (u8 *) mgmt->u.assoc_resp.variable;
 521                         event.assoc_reject.resp_ies_len =
 522                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 523                 }
 524                 event.assoc_reject.status_code = status;
 525
 526                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 527                 return;
 528         }
 529
 530         drv->associated = 1;
 531         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 532
 533         os_memset(&event, 0, sizeof(event));
 534         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 535                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 536                 event.assoc_info.resp_ies_len =
 537                         len - 24 - sizeof(mgmt->u.assoc_resp);
 538         }
 539
 540         event.assoc_info.freq = drv->assoc_freq;
 541
 542         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 543 }
 544
 545
 546 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 547                                enum nl80211_commands cmd, struct nlattr *status,
 548                                struct nlattr *addr, struct nlattr *req_ie,
 549                                struct nlattr *resp_ie)
 550 {
 551         union wpa_event_data event;
 552
 553         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 554                 /*
 555                  * Avoid reporting two association events that would confuse
 556                  * the core code.
 557                  */
 558                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 559                            "when using userspace SME", cmd);
 560                 return;
 561         }
 562
 563         os_memset(&event, 0, sizeof(event));
 564         if (cmd == NL80211_CMD_CONNECT &&
 565             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 566                 if (resp_ie) {
 567                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 568                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 569                 }
 570                 event.assoc_reject.status_code = nla_get_u16(status);
 571                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 572                 return;
 573         }
 574
 575         drv->associated = 1;
 576         if (addr)
 577                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 578
 579         if (req_ie) {
 580                 event.assoc_info.req_ies = nla_data(req_ie);
 581                 event.assoc_info.req_ies_len = nla_len(req_ie);
 582         }
 583         if (resp_ie) {
 584                 event.assoc_info.resp_ies = nla_data(resp_ie);
 585                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 586         }
 587
 588         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 589 }
 590
 591
 592 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 593                                enum nl80211_commands cmd, struct nlattr *addr)
 594 {
 595         union wpa_event_data event;
 596         enum wpa_event_type ev;
 597
 598         if (nla_len(addr) != ETH_ALEN)
 599                 return;
 600
 601         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 602                    cmd, MAC2STR((u8 *) nla_data(addr)));
 603
 604         if (cmd == NL80211_CMD_AUTHENTICATE)
 605                 ev = EVENT_AUTH_TIMED_OUT;
 606         else if (cmd == NL80211_CMD_ASSOCIATE)
 607                 ev = EVENT_ASSOC_TIMED_OUT;
 608         else
 609                 return;
 610
 611         os_memset(&event, 0, sizeof(event));
 612         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 613         wpa_supplicant_event(drv->ctx, ev, &event);
 614 }
 615
 616
 617 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 618                        enum nl80211_commands cmd, struct nlattr *frame,
 619                        struct nlattr *addr, struct nlattr *timed_out)
 620 {
 621         if (timed_out && addr) {
 622                 mlme_timeout_event(drv, cmd, addr);
 623                 return;
 624         }
 625
 626         if (frame == NULL) {
 627                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 628                            "data", cmd);
 629                 return;
 630         }
 631
 632         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 633         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 634                     nla_data(frame), nla_len(frame));
 635
 636         switch (cmd) {
 637         case NL80211_CMD_AUTHENTICATE:
 638                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 639                 break;
 640         case NL80211_CMD_ASSOCIATE:
 641                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 642                 break;
 643         case NL80211_CMD_DEAUTHENTICATE:
 644                 drv->associated = 0;
 645                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 646                 break;
 647         case NL80211_CMD_DISASSOCIATE:
 648                 drv->associated = 0;
 649                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 650                 break;
 651         default:
 652                 break;
 653         }
 654 }
 655
 656
 657 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 658                                            struct nlattr *tb[])
 659 {
 660         union wpa_event_data data;
 661
 662         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 663         os_memset(&data, 0, sizeof(data));
 664         if (tb[NL80211_ATTR_MAC]) {
 665                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 666                             nla_data(tb[NL80211_ATTR_MAC]),
 667                             nla_len(tb[NL80211_ATTR_MAC]));
 668                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 669         }
 670         if (tb[NL80211_ATTR_KEY_SEQ]) {
 671                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 672                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 673                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 674         }
 675         if (tb[NL80211_ATTR_KEY_TYPE]) {
 676                 enum nl80211_key_type key_type =
 677                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 678                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 679                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 680                         data.michael_mic_failure.unicast = 1;
 681         } else
 682                 data.michael_mic_failure.unicast = 1;
 683
 684         if (tb[NL80211_ATTR_KEY_IDX]) {
 685                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 686                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 687         }
 688
 689         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 690 }
 691
 692
 693 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 694                                  struct nlattr *tb[])
 695 {
 696         if (tb[NL80211_ATTR_MAC] == NULL) {
 697                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 698                            "event");
 699                 return;
 700         }
 701         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 702         drv->associated = 1;
 703         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 704                    MAC2STR(drv->bssid));
 705
 706         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 707 }
 708
 709
 710 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
 711                             struct nlattr *tb[])
 712 {
 713         union wpa_event_data event;
 714         struct nlattr *nl;
 715         int rem;
 716         struct scan_info *info;
 717 #define MAX_REPORT_FREQS 50
 718         int freqs[MAX_REPORT_FREQS];
 719         int num_freqs = 0;
 720
 721         os_memset(&event, 0, sizeof(event));
 722         info = &event.scan_info;
 723         info->aborted = aborted;
 724
 725         if (tb[NL80211_ATTR_SCAN_SSIDS]) {
 726                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
 727                         struct wpa_driver_scan_ssid *s =
 728                                 &info->ssids[info->num_ssids];
 729                         s->ssid = nla_data(nl);
 730                         s->ssid_len = nla_len(nl);
 731                         info->num_ssids++;
 732                         if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
 733                                 break;
 734                 }
 735         }
 736         if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
 737                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
 738                 {
 739                         freqs[num_freqs] = nla_get_u32(nl);
 740                         num_freqs++;
 741                         if (num_freqs == MAX_REPORT_FREQS - 1)
 742                                 break;
 743                 }
 744                 info->freqs = freqs;
 745                 info->num_freqs = num_freqs;
 746         }
 747         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
 748 }
 749
 750
 751 static int process_event(struct nl_msg *msg, void *arg)
 752 {
 753         struct wpa_driver_nl80211_data *drv = arg;
 754         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 755         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 756
 757         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 758                   genlmsg_attrlen(gnlh, 0), NULL);
 759
 760         if (tb[NL80211_ATTR_IFINDEX]) {
 761                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 762                 if (ifindex != drv->ifindex) {
 763                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 764                                    " for foreign interface (ifindex %d)",
 765                                    gnlh->cmd, ifindex);
 766                         return NL_SKIP;
 767                 }
 768         }
 769
 770         if (drv->ap_scan_as_station &&
 771             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 772              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 773                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 774                 drv->ap_scan_as_station = 0;
 775         }
 776
 777         switch (gnlh->cmd) {
 778         case NL80211_CMD_TRIGGER_SCAN:
 779                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 780                 break;
 781         case NL80211_CMD_NEW_SCAN_RESULTS:
 782                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 783                 drv->scan_complete_events = 1;
 784                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 785                                      drv->ctx);
 786                 send_scan_event(drv, 0, tb);
 787                 break;
 788         case NL80211_CMD_SCAN_ABORTED:
 789                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 790                 /*
 791                  * Need to indicate that scan results are available in order
 792                  * not to make wpa_supplicant stop its scanning.
 793                  */
 794                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 795                                      drv->ctx);
 796                 send_scan_event(drv, 1, tb);
 797                 break;
 798         case NL80211_CMD_AUTHENTICATE:
 799         case NL80211_CMD_ASSOCIATE:
 800         case NL80211_CMD_DEAUTHENTICATE:
 801         case NL80211_CMD_DISASSOCIATE:
 802                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 803                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
 804                 break;
 805         case NL80211_CMD_CONNECT:
 806         case NL80211_CMD_ROAM:
 807                 mlme_event_connect(drv, gnlh->cmd,
 808                                    tb[NL80211_ATTR_STATUS_CODE],
 809                                    tb[NL80211_ATTR_MAC],
 810                                    tb[NL80211_ATTR_REQ_IE],
 811                                    tb[NL80211_ATTR_RESP_IE]);
 812                 break;
 813         case NL80211_CMD_DISCONNECT:
 814                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 815                         /*
 816                          * Avoid reporting two disassociation events that could
 817                          * confuse the core code.
 818                          */
 819                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 820                                    "event when using userspace SME");
 821                         break;
 822                 }
 823                 drv->associated = 0;
 824                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 825                 break;
 826         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 827                 mlme_event_michael_mic_failure(drv, tb);
 828                 break;
 829         case NL80211_CMD_JOIN_IBSS:
 830                 mlme_event_join_ibss(drv, tb);
 831                 break;
 832         default:
 833                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 834                            "(cmd=%d)", gnlh->cmd);
 835                 break;
 836         }
 837
 838         return NL_SKIP;
 839 }
 840
 841
 842 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 843                                              void *sock_ctx)
 844 {
 845         struct nl_cb *cb;
 846         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 847
 848         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 849
 850         cb = nl_cb_clone(drv->nl_cb);
 851         if (!cb)
 852                 return;
 853         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 854         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 855         nl_recvmsgs(drv->nl_handle_event, cb);
 856         nl_cb_put(cb);
 857 }
 858
 859
 860 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 861                                    const char *ifname, int dev_up)
 862 {
 863         struct ifreq ifr;
 864
 865         if (drv->ioctl_sock < 0)
 866                 return -1;
 867
 868         os_memset(&ifr, 0, sizeof(ifr));
 869         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 870
 871         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 872                 perror("ioctl[SIOCGIFFLAGS]");
 873                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 874                            ifname);
 875                 return -1;
 876         }
 877
 878         if (dev_up) {
 879                 if (ifr.ifr_flags & IFF_UP)
 880                         return 0;
 881                 ifr.ifr_flags |= IFF_UP;
 882         } else {
 883                 if (!(ifr.ifr_flags & IFF_UP))
 884                         return 0;
 885                 ifr.ifr_flags &= ~IFF_UP;
 886         }
 887
 888         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 889                 perror("ioctl[SIOCSIFFLAGS]");
 890                 return -1;
 891         }
 892
 893         return 0;
 894 }
 895
 896
 897 /**
 898  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 899  * @priv: driver_nl80211 private data
 900  * @alpha2_arg: country to which to switch to
 901  * Returns: 0 on success, -1 on failure
 902  *
 903  * This asks nl80211 to set the regulatory domain for given
 904  * country ISO / IEC alpha2.
 905  */
 906 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 907 {
 908         struct wpa_driver_nl80211_data *drv = priv;
 909         char alpha2[3];
 910         struct nl_msg *msg;
 911
 912         msg = nlmsg_alloc();
 913         if (!msg)
 914                 return -ENOMEM;
 915
 916         alpha2[0] = alpha2_arg[0];
 917         alpha2[1] = alpha2_arg[1];
 918         alpha2[2] = '\0';
 919
 920         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 921                     0, NL80211_CMD_REQ_SET_REG, 0);
 922
 923         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 924         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 925                 return -EINVAL;
 926         return 0;
 927 nla_put_failure:
 928         return -EINVAL;
 929 }
 930
 931
 932 #ifndef HOSTAPD
 933 struct wiphy_info_data {
 934         int max_scan_ssids;
 935         int ap_supported;
 936         int auth_supported;
 937         int connect_supported;
 938 };
 939
 940
 941 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 942 {
 943         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 944         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 945         struct wiphy_info_data *info = arg;
 946
 947         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 948                   genlmsg_attrlen(gnlh, 0), NULL);
 949
 950         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 951                 info->max_scan_ssids =
 952                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 953
 954         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 955                 struct nlattr *nl_mode;
 956                 int i;
 957                 nla_for_each_nested(nl_mode,
 958                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 959                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 960                                 info->ap_supported = 1;
 961                                 break;
 962                         }
 963                 }
 964         }
 965
 966         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
 967                 struct nlattr *nl_cmd;
 968                 int i;
 969
 970                 nla_for_each_nested(nl_cmd,
 971                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
 972                         u32 cmd = nla_get_u32(nl_cmd);
 973                         if (cmd == NL80211_CMD_AUTHENTICATE)
 974                                 info->auth_supported = 1;
 975                         else if (cmd == NL80211_CMD_CONNECT)
 976                                 info->connect_supported = 1;
 977                 }
 978         }
 979
 980         return NL_SKIP;
 981 }
 982
 983
 984 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 985                                        struct wiphy_info_data *info)
 986 {
 987         struct nl_msg *msg;
 988
 989         os_memset(info, 0, sizeof(*info));
 990         msg = nlmsg_alloc();
 991         if (!msg)
 992                 return -1;
 993
 994         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 995                     0, NL80211_CMD_GET_WIPHY, 0);
 996
 997         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 998
 999         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1000                 return 0;
1001         msg = NULL;
1002 nla_put_failure:
1003         nlmsg_free(msg);
1004         return -1;
1005 }
1006
1007
1008 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1009 {
1010         struct wiphy_info_data info;
1011         if (wpa_driver_nl80211_get_info(drv, &info))
1012                 return -1;
1013         drv->has_capability = 1;
1014         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1015         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1016                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1017                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1018                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1019         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1020                 WPA_DRIVER_CAPA_ENC_WEP104 |
1021                 WPA_DRIVER_CAPA_ENC_TKIP |
1022                 WPA_DRIVER_CAPA_ENC_CCMP;
1023         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1024                 WPA_DRIVER_AUTH_SHARED |
1025                 WPA_DRIVER_AUTH_LEAP;
1026
1027         drv->capa.max_scan_ssids = info.max_scan_ssids;
1028         if (info.ap_supported)
1029                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1030
1031         if (info.auth_supported)
1032                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1033         else if (!info.connect_supported) {
1034                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1035                            "authentication/association or connect commands");
1036                 return -1;
1037         }
1038
1039         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1040
1041         return 0;
1042 }
1043 #endif /* HOSTAPD */
1044
1045
1046 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1047                                       void *ctx)
1048 {
1049         int ret;
1050
1051         /* Initialize generic netlink and nl80211 */
1052
1053         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1054         if (drv->nl_cb == NULL) {
1055                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1056                            "callbacks");
1057                 goto err1;
1058         }
1059
1060         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1061         if (drv->nl_handle == NULL) {
1062                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1063                            "callbacks");
1064                 goto err2;
1065         }
1066
1067         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1068         if (drv->nl_handle_event == NULL) {
1069                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1070                            "callbacks (event)");
1071                 goto err2b;
1072         }
1073
1074         if (genl_connect(drv->nl_handle)) {
1075                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1076                            "netlink");
1077                 goto err3;
1078         }
1079
1080         if (genl_connect(drv->nl_handle_event)) {
1081                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1082                            "netlink (event)");
1083                 goto err3;
1084         }
1085
1086 #ifdef CONFIG_LIBNL20
1087         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1088                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1089                            "netlink cache");
1090                 goto err3;
1091         }
1092         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1093             0) {
1094                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1095                            "netlink cache (event)");
1096                 goto err3b;
1097         }
1098 #else /* CONFIG_LIBNL20 */
1099         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1100         if (drv->nl_cache == NULL) {
1101                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1102                            "netlink cache");
1103                 goto err3;
1104         }
1105         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1106         if (drv->nl_cache_event == NULL) {
1107                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1108                            "netlink cache (event)");
1109                 goto err3b;
1110         }
1111 #endif /* CONFIG_LIBNL20 */
1112
1113         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1114         if (drv->nl80211 == NULL) {
1115                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1116                            "found");
1117                 goto err4;
1118         }
1119
1120         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1121         if (ret >= 0)
1122                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1123         if (ret < 0) {
1124                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1125                            "membership for scan events: %d (%s)",
1126                            ret, strerror(-ret));
1127                 goto err4;
1128         }
1129
1130         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1131         if (ret >= 0)
1132                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1133         if (ret < 0) {
1134                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1135                            "membership for mlme events: %d (%s)",
1136                            ret, strerror(-ret));
1137                 goto err4;
1138         }
1139
1140         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1141                                  wpa_driver_nl80211_event_receive, drv, ctx);
1142
1143         return 0;
1144
1145 err4:
1146         nl_cache_free(drv->nl_cache_event);
1147 err3b:
1148         nl_cache_free(drv->nl_cache);
1149 err3:
1150         nl_handle_destroy(drv->nl_handle_event);
1151 err2b:
1152         nl_handle_destroy(drv->nl_handle);
1153 err2:
1154         nl_cb_put(drv->nl_cb);
1155 err1:
1156         return -1;
1157 }
1158
1159
1160 /**
1161  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1162  * @ctx: context to be used when calling wpa_supplicant functions,
1163  * e.g., wpa_supplicant_event()
1164  * @ifname: interface name, e.g., wlan0
1165  * Returns: Pointer to private data, %NULL on failure
1166  */
1167 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1168 {
1169         struct wpa_driver_nl80211_data *drv;
1170         struct netlink_config *cfg;
1171
1172         drv = os_zalloc(sizeof(*drv));
1173         if (drv == NULL)
1174                 return NULL;
1175         drv->ctx = ctx;
1176         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1177         drv->monitor_ifidx = -1;
1178         drv->monitor_sock = -1;
1179         drv->ioctl_sock = -1;
1180
1181         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1182                 os_free(drv);
1183                 return NULL;
1184         }
1185
1186         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1187         if (drv->ioctl_sock < 0) {
1188                 perror("socket(PF_INET,SOCK_DGRAM)");
1189                 goto failed;
1190         }
1191
1192         cfg = os_zalloc(sizeof(*cfg));
1193         if (cfg == NULL)
1194                 goto failed;
1195         cfg->ctx = drv;
1196         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1197         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1198         drv->netlink = netlink_init(cfg);
1199         if (drv->netlink == NULL) {
1200                 os_free(cfg);
1201                 goto failed;
1202         }
1203         if (wpa_driver_nl80211_finish_drv_init(drv))
1204                 goto failed;
1205
1206         return drv;
1207
1208 failed:
1209         netlink_deinit(drv->netlink);
1210         if (drv->ioctl_sock >= 0)
1211                 close(drv->ioctl_sock);
1212
1213         genl_family_put(drv->nl80211);
1214         nl_cache_free(drv->nl_cache);
1215         nl_handle_destroy(drv->nl_handle);
1216         nl_cb_put(drv->nl_cb);
1217
1218         os_free(drv);
1219         return NULL;
1220 }
1221
1222
1223 static int
1224 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1225 {
1226         drv->ifindex = if_nametoindex(drv->ifname);
1227
1228 #ifndef HOSTAPD
1229         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1230                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1231                            "use managed mode");
1232         }
1233
1234         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1235                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1236                            "UP", drv->ifname);
1237                 return -1;
1238         }
1239
1240         if (wpa_driver_nl80211_capa(drv))
1241                 return -1;
1242
1243         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1244                                1, IF_OPER_DORMANT);
1245 #endif /* HOSTAPD */
1246
1247         return 0;
1248 }
1249
1250
1251 #ifdef HOSTAPD
1252 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1253 {
1254         struct i802_bss *bss, *prev;
1255         bss = drv->bss.next;
1256         while (bss) {
1257                 prev = bss;
1258                 bss = bss->next;
1259                 os_free(bss);
1260         }
1261 }
1262 #endif /* HOSTAPD */
1263
1264
1265 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1266 {
1267         struct nl_msg *msg;
1268
1269         msg = nlmsg_alloc();
1270         if (!msg)
1271                 return -ENOMEM;
1272
1273         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1274                     0, NL80211_CMD_DEL_BEACON, 0);
1275         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1276
1277         return send_and_recv_msgs(drv, msg, NULL, NULL);
1278  nla_put_failure:
1279         return -ENOBUFS;
1280 }
1281
1282
1283 /**
1284  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1285  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1286  *
1287  * Shut down driver interface and processing of driver events. Free
1288  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1289  */
1290 static void wpa_driver_nl80211_deinit(void *priv)
1291 {
1292         struct wpa_driver_nl80211_data *drv = priv;
1293
1294         nl80211_remove_monitor_interface(drv);
1295         if (drv->monitor_sock >= 0) {
1296                 eloop_unregister_read_sock(drv->monitor_sock);
1297                 close(drv->monitor_sock);
1298         }
1299
1300         if (drv->nlmode == NL80211_IFTYPE_AP)
1301                 wpa_driver_nl80211_del_beacon(drv);
1302
1303 #ifdef HOSTAPD
1304         if (drv->last_freq_ht) {
1305                 /* Clear HT flags from the driver */
1306                 struct hostapd_freq_params freq;
1307                 os_memset(&freq, 0, sizeof(freq));
1308                 freq.freq = drv->last_freq;
1309                 i802_set_freq(priv, &freq);
1310         }
1311
1312         if (drv->eapol_sock >= 0) {
1313                 eloop_unregister_read_sock(drv->eapol_sock);
1314                 close(drv->eapol_sock);
1315         }
1316
1317         if (drv->if_indices != drv->default_if_indices)
1318                 os_free(drv->if_indices);
1319
1320         wpa_driver_nl80211_free_bss(drv);
1321 #endif /* HOSTAPD */
1322
1323         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1324         netlink_deinit(drv->netlink);
1325
1326         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1327
1328         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1329         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1330
1331         if (drv->ioctl_sock >= 0)
1332                 close(drv->ioctl_sock);
1333
1334         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1335         genl_family_put(drv->nl80211);
1336         nl_cache_free(drv->nl_cache);
1337         nl_cache_free(drv->nl_cache_event);
1338         nl_handle_destroy(drv->nl_handle);
1339         nl_handle_destroy(drv->nl_handle_event);
1340         nl_cb_put(drv->nl_cb);
1341
1342         os_free(drv);
1343 }
1344
1345
1346 /**
1347  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1348  * @eloop_ctx: Driver private data
1349  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1350  *
1351  * This function can be used as registered timeout when starting a scan to
1352  * generate a scan completed event if the driver does not report this.
1353  */
1354 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1355 {
1356         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1357         if (drv->ap_scan_as_station) {
1358                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1359                 drv->ap_scan_as_station = 0;
1360         }
1361         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1362         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1363 }
1364
1365
1366 /**
1367  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1368  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1369  * @params: Scan parameters
1370  * Returns: 0 on success, -1 on failure
1371  */
1372 static int wpa_driver_nl80211_scan(void *priv,
1373                                    struct wpa_driver_scan_params *params)
1374 {
1375         struct wpa_driver_nl80211_data *drv = priv;
1376         int ret = 0, timeout;
1377         struct nl_msg *msg, *ssids, *freqs;
1378         size_t i;
1379
1380         msg = nlmsg_alloc();
1381         ssids = nlmsg_alloc();
1382         freqs = nlmsg_alloc();
1383         if (!msg || !ssids || !freqs) {
1384                 nlmsg_free(msg);
1385                 nlmsg_free(ssids);
1386                 nlmsg_free(freqs);
1387                 return -1;
1388         }
1389
1390         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1391                     NL80211_CMD_TRIGGER_SCAN, 0);
1392
1393         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1394
1395         for (i = 0; i < params->num_ssids; i++) {
1396                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1397                         params->ssids[i].ssid);
1398         }
1399         if (params->num_ssids)
1400                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1401
1402         if (params->extra_ies) {
1403                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1404                         params->extra_ies);
1405         }
1406
1407         if (params->freqs) {
1408                 for (i = 0; params->freqs[i]; i++)
1409                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1410                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1411         }
1412
1413         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1414         msg = NULL;
1415         if (ret) {
1416                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1417                            "(%s)", ret, strerror(-ret));
1418 #ifdef HOSTAPD
1419                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1420                         /*
1421                          * mac80211 does not allow scan requests in AP mode, so
1422                          * try to do this in station mode.
1423                          */
1424                         if (wpa_driver_nl80211_set_mode(drv,
1425                                                         IEEE80211_MODE_INFRA))
1426                                 goto nla_put_failure;
1427
1428                         if (wpa_driver_nl80211_scan(drv, params)) {
1429                                 wpa_driver_nl80211_set_mode(drv,
1430                                                             IEEE80211_MODE_AP);
1431                                 goto nla_put_failure;
1432                         }
1433
1434                         /* Restore AP mode when processing scan results */
1435                         drv->ap_scan_as_station = 1;
1436                         ret = 0;
1437                 } else
1438                         goto nla_put_failure;
1439 #else /* HOSTAPD */
1440                 goto nla_put_failure;
1441 #endif /* HOSTAPD */
1442         }
1443
1444         /* Not all drivers generate "scan completed" wireless event, so try to
1445          * read results after a timeout. */
1446         timeout = 10;
1447         if (drv->scan_complete_events) {
1448                 /*
1449                  * The driver seems to deliver events to notify when scan is
1450                  * complete, so use longer timeout to avoid race conditions
1451                  * with scanning and following association request.
1452                  */
1453                 timeout = 30;
1454         }
1455         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1456                    "seconds", ret, timeout);
1457         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1458         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1459                                drv, drv->ctx);
1460
1461 nla_put_failure:
1462         nlmsg_free(ssids);
1463         nlmsg_free(msg);
1464         nlmsg_free(freqs);
1465         return ret;
1466 }
1467
1468
1469 static int bss_info_handler(struct nl_msg *msg, void *arg)
1470 {
1471         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1472         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1473         struct nlattr *bss[NL80211_BSS_MAX + 1];
1474         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1475                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1476                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1477                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1478                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1479                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1480                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1481                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1482                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1483                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1484                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1485         };
1486         struct wpa_scan_results *res = arg;
1487         struct wpa_scan_res **tmp;
1488         struct wpa_scan_res *r;
1489         const u8 *ie;
1490         size_t ie_len;
1491
1492         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1493                   genlmsg_attrlen(gnlh, 0), NULL);
1494         if (!tb[NL80211_ATTR_BSS])
1495                 return NL_SKIP;
1496         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1497                              bss_policy))
1498                 return NL_SKIP;
1499         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1500                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1501                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1502         } else {
1503                 ie = NULL;
1504                 ie_len = 0;
1505         }
1506
1507         r = os_zalloc(sizeof(*r) + ie_len);
1508         if (r == NULL)
1509                 return NL_SKIP;
1510         if (bss[NL80211_BSS_BSSID])
1511                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1512                           ETH_ALEN);
1513         if (bss[NL80211_BSS_FREQUENCY])
1514                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1515         if (bss[NL80211_BSS_BEACON_INTERVAL])
1516                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1517         if (bss[NL80211_BSS_CAPABILITY])
1518                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1519         r->flags |= WPA_SCAN_NOISE_INVALID;
1520         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1521                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1522                 r->level /= 100; /* mBm to dBm */
1523                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1524         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1525                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1526                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1527         } else
1528                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1529         if (bss[NL80211_BSS_TSF])
1530                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1531         if (bss[NL80211_BSS_SEEN_MS_AGO])
1532                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1533         r->ie_len = ie_len;
1534         if (ie)
1535                 os_memcpy(r + 1, ie, ie_len);
1536
1537         if (bss[NL80211_BSS_STATUS]) {
1538                 enum nl80211_bss_status status;
1539                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1540                 switch (status) {
1541                 case NL80211_BSS_STATUS_AUTHENTICATED:
1542                         r->flags |= WPA_SCAN_AUTHENTICATED;
1543                         break;
1544                 case NL80211_BSS_STATUS_ASSOCIATED:
1545                         r->flags |= WPA_SCAN_ASSOCIATED;
1546                         break;
1547                 default:
1548                         break;
1549                 }
1550         }
1551
1552         tmp = os_realloc(res->res,
1553                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1554         if (tmp == NULL) {
1555                 os_free(r);
1556                 return NL_SKIP;
1557         }
1558         tmp[res->num++] = r;
1559         res->res = tmp;
1560
1561         return NL_SKIP;
1562 }
1563
1564
1565 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1566                                  const u8 *addr)
1567 {
1568         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1569                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1570                            "mismatch");
1571                 wpa_driver_nl80211_mlme(drv, addr,
1572                                         NL80211_CMD_DEAUTHENTICATE,
1573                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1574         }
1575 }
1576
1577
1578 static void wpa_driver_nl80211_check_bss_status(
1579         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1580 {
1581         size_t i;
1582
1583         for (i = 0; i < res->num; i++) {
1584                 struct wpa_scan_res *r = res->res[i];
1585                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1586                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1587                                    "indicates BSS status with " MACSTR
1588                                    " as authenticated",
1589                                    MAC2STR(r->bssid));
1590                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1591                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1592                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1593                             0) {
1594                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1595                                            " in local state (auth=" MACSTR
1596                                            " assoc=" MACSTR ")",
1597                                            MAC2STR(drv->auth_bssid),
1598                                            MAC2STR(drv->bssid));
1599                         }
1600                 }
1601
1602                 if (r->flags & WPA_SCAN_ASSOCIATED) {
1603                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1604                                    "indicate BSS status with " MACSTR
1605                                    " as associated",
1606                                    MAC2STR(r->bssid));
1607                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1608                             !drv->associated) {
1609                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1610                                            "(not associated) does not match "
1611                                            "with BSS state");
1612                                 clear_state_mismatch(drv, r->bssid);
1613                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1614                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1615                                    0) {
1616                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1617                                            "(associated with " MACSTR ") does "
1618                                            "not match with BSS state",
1619                                            MAC2STR(drv->bssid));
1620                                 clear_state_mismatch(drv, r->bssid);
1621                                 clear_state_mismatch(drv, drv->bssid);
1622                         }
1623                 }
1624         }
1625 }
1626
1627
1628 /**
1629  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1630  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1631  * Returns: Scan results on success, -1 on failure
1632  */
1633 static struct wpa_scan_results *
1634 wpa_driver_nl80211_get_scan_results(void *priv)
1635 {
1636         struct wpa_driver_nl80211_data *drv = priv;
1637         struct nl_msg *msg;
1638         struct wpa_scan_results *res;
1639         int ret;
1640
1641         res = os_zalloc(sizeof(*res));
1642         if (res == NULL)
1643                 return NULL;
1644         msg = nlmsg_alloc();
1645         if (!msg)
1646                 goto nla_put_failure;
1647
1648         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1649                     NL80211_CMD_GET_SCAN, 0);
1650         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1651
1652         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1653         msg = NULL;
1654         if (ret == 0) {
1655                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1656                            (unsigned long) res->num);
1657                 wpa_driver_nl80211_check_bss_status(drv, res);
1658                 return res;
1659         }
1660         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1661                    "(%s)", ret, strerror(-ret));
1662 nla_put_failure:
1663         nlmsg_free(msg);
1664         wpa_scan_results_free(res);
1665         return NULL;
1666 }
1667
1668
1669 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1670                                       enum wpa_alg alg, const u8 *addr,
1671                                       int key_idx, int set_tx,
1672                                       const u8 *seq, size_t seq_len,
1673                                       const u8 *key, size_t key_len)
1674 {
1675         struct wpa_driver_nl80211_data *drv = priv;
1676         int ifindex = if_nametoindex(ifname);
1677         struct nl_msg *msg;
1678         int ret;
1679
1680         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1681                    "set_tx=%d seq_len=%lu key_len=%lu",
1682                    __func__, ifindex, alg, addr, key_idx, set_tx,
1683                    (unsigned long) seq_len, (unsigned long) key_len);
1684
1685         msg = nlmsg_alloc();
1686         if (!msg)
1687                 return -ENOMEM;
1688
1689         if (alg == WPA_ALG_NONE) {
1690                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1691                             0, NL80211_CMD_DEL_KEY, 0);
1692         } else {
1693                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1694                             0, NL80211_CMD_NEW_KEY, 0);
1695                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1696                 switch (alg) {
1697                 case WPA_ALG_WEP:
1698                         if (key_len == 5)
1699                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1700                                             WLAN_CIPHER_SUITE_WEP40);
1701                         else
1702                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1703                                             WLAN_CIPHER_SUITE_WEP104);
1704                         break;
1705                 case WPA_ALG_TKIP:
1706                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1707                                     WLAN_CIPHER_SUITE_TKIP);
1708                         break;
1709                 case WPA_ALG_CCMP:
1710                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1711                                     WLAN_CIPHER_SUITE_CCMP);
1712                         break;
1713                 case WPA_ALG_IGTK:
1714                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1715                                     WLAN_CIPHER_SUITE_AES_CMAC);
1716                         break;
1717                 default:
1718                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1719                                    "algorithm %d", __func__, alg);
1720                         nlmsg_free(msg);
1721                         return -1;
1722                 }
1723         }
1724
1725         if (seq && seq_len)
1726                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1727
1728         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1729         {
1730                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1731                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1732         }
1733         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1734         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1735
1736         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1737         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1738                 ret = 0;
1739         if (ret)
1740                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1741                            ret, strerror(-ret));
1742
1743         /*
1744          * If we failed or don't need to set the default TX key (below),
1745          * we're done here.
1746          */
1747         if (ret || !set_tx || alg == WPA_ALG_NONE)
1748                 return ret;
1749 #ifdef HOSTAPD /* FIX: is this needed? */
1750         if (addr)
1751                 return ret;
1752 #endif /* HOSTAPD */
1753
1754         msg = nlmsg_alloc();
1755         if (!msg)
1756                 return -ENOMEM;
1757
1758         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1759                     0, NL80211_CMD_SET_KEY, 0);
1760         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1761         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1762         if (alg == WPA_ALG_IGTK)
1763                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1764         else
1765                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1766
1767         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1768         if (ret == -ENOENT)
1769                 ret = 0;
1770         if (ret)
1771                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1772                            "err=%d %s)", ret, strerror(-ret));
1773         return ret;
1774
1775 nla_put_failure:
1776         return -ENOBUFS;
1777 }
1778
1779
1780 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
1781                       int key_idx, int defkey,
1782                       const u8 *seq, size_t seq_len,
1783                       const u8 *key, size_t key_len)
1784 {
1785         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1786         if (!key_attr)
1787                 return -1;
1788
1789         if (defkey && alg == WPA_ALG_IGTK)
1790                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1791         else if (defkey)
1792                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1793
1794         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1795
1796         switch (alg) {
1797         case WPA_ALG_WEP:
1798                 if (key_len == 5)
1799                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1800                                     WLAN_CIPHER_SUITE_WEP40);
1801                 else
1802                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1803                                     WLAN_CIPHER_SUITE_WEP104);
1804                 break;
1805         case WPA_ALG_TKIP:
1806                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1807                 break;
1808         case WPA_ALG_CCMP:
1809                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1810                 break;
1811         case WPA_ALG_IGTK:
1812                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1813                             WLAN_CIPHER_SUITE_AES_CMAC);
1814                 break;
1815         default:
1816                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1817                            "algorithm %d", __func__, alg);
1818                 return -1;
1819         }
1820
1821         if (seq && seq_len)
1822                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1823
1824         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1825
1826         nla_nest_end(msg, key_attr);
1827
1828         return 0;
1829  nla_put_failure:
1830         return -1;
1831 }
1832
1833
1834 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1835                                  struct nl_msg *msg)
1836 {
1837         int i, privacy = 0;
1838         struct nlattr *nl_keys, *nl_key;
1839
1840         for (i = 0; i < 4; i++) {
1841                 if (!params->wep_key[i])
1842                         continue;
1843                 privacy = 1;
1844                 break;
1845         }
1846         if (!privacy)
1847                 return 0;
1848
1849         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1850
1851         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1852         if (!nl_keys)
1853                 goto nla_put_failure;
1854
1855         for (i = 0; i < 4; i++) {
1856                 if (!params->wep_key[i])
1857                         continue;
1858
1859                 nl_key = nla_nest_start(msg, i);
1860                 if (!nl_key)
1861                         goto nla_put_failure;
1862
1863                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1864                         params->wep_key[i]);
1865                 if (params->wep_key_len[i] == 5)
1866                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1867                                     WLAN_CIPHER_SUITE_WEP40);
1868                 else
1869                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1870                                     WLAN_CIPHER_SUITE_WEP104);
1871
1872                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1873
1874                 if (i == params->wep_tx_keyidx)
1875                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1876
1877                 nla_nest_end(msg, nl_key);
1878         }
1879         nla_nest_end(msg, nl_keys);
1880
1881         return 0;
1882
1883 nla_put_failure:
1884         return -ENOBUFS;
1885 }
1886
1887
1888 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1889                                    const u8 *addr, int cmd, u16 reason_code)
1890 {
1891         int ret = -1;
1892         struct nl_msg *msg;
1893
1894         msg = nlmsg_alloc();
1895         if (!msg)
1896                 return -1;
1897
1898         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1899
1900         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1901         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1902         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1903
1904         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1905         msg = NULL;
1906         if (ret) {
1907                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1908                            "(%s)", ret, strerror(-ret));
1909                 goto nla_put_failure;
1910         }
1911         ret = 0;
1912
1913 nla_put_failure:
1914         nlmsg_free(msg);
1915         return ret;
1916 }
1917
1918
1919 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
1920                                          const u8 *addr, int reason_code)
1921 {
1922         wpa_printf(MSG_DEBUG, "%s", __func__);
1923         drv->associated = 0;
1924         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
1925                                        reason_code);
1926 }
1927
1928
1929 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1930                                              int reason_code)
1931 {
1932         struct wpa_driver_nl80211_data *drv = priv;
1933         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1934                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1935         wpa_printf(MSG_DEBUG, "%s", __func__);
1936         drv->associated = 0;
1937         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1938                                        reason_code);
1939 }
1940
1941
1942 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1943                                            int reason_code)
1944 {
1945         struct wpa_driver_nl80211_data *drv = priv;
1946         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1947                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1948         wpa_printf(MSG_DEBUG, "%s", __func__);
1949         drv->associated = 0;
1950         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1951                                        reason_code);
1952 }
1953
1954
1955 static int wpa_driver_nl80211_authenticate(
1956         void *priv, struct wpa_driver_auth_params *params)
1957 {
1958         struct wpa_driver_nl80211_data *drv = priv;
1959         int ret = -1, i;
1960         struct nl_msg *msg;
1961         enum nl80211_auth_type type;
1962         int count = 0;
1963
1964         drv->associated = 0;
1965         os_memset(drv->auth_bssid, 0, ETH_ALEN);
1966
1967         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
1968                 return -1;
1969
1970 retry:
1971         msg = nlmsg_alloc();
1972         if (!msg)
1973                 return -1;
1974
1975         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1976                    drv->ifindex);
1977
1978         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1979                     NL80211_CMD_AUTHENTICATE, 0);
1980
1981         for (i = 0; i < 4; i++) {
1982                 if (!params->wep_key[i])
1983                         continue;
1984                 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
1985                                            i,
1986                                            i == params->wep_tx_keyidx, NULL, 0,
1987                                            params->wep_key[i],
1988                                            params->wep_key_len[i]);
1989                 if (params->wep_tx_keyidx != i)
1990                         continue;
1991                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
1992                                params->wep_key[i], params->wep_key_len[i])) {
1993                         nlmsg_free(msg);
1994                         return -1;
1995                 }
1996         }
1997
1998         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1999         if (params->bssid) {
2000                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2001                            MAC2STR(params->bssid));
2002                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2003         }
2004         if (params->freq) {
2005                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2006                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2007         }
2008         if (params->ssid) {
2009                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2010                                   params->ssid, params->ssid_len);
2011                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2012                         params->ssid);
2013         }
2014         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2015         if (params->ie)
2016                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2017         /*
2018          * TODO: if multiple auth_alg options enabled, try them one by one if
2019          * the AP rejects authentication due to unknown auth alg
2020          */
2021         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2022                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2023         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2024                 type = NL80211_AUTHTYPE_SHARED_KEY;
2025         else if (params->auth_alg & AUTH_ALG_LEAP)
2026                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2027         else if (params->auth_alg & AUTH_ALG_FT)
2028                 type = NL80211_AUTHTYPE_FT;
2029         else
2030                 goto nla_put_failure;
2031         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2032         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2033
2034         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2035         msg = NULL;
2036         if (ret) {
2037                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2038                            "(%s)", ret, strerror(-ret));
2039                 count++;
2040                 if (ret == -EALREADY && count == 1 && params->bssid) {
2041                         /*
2042                          * mac80211 does not currently accept new
2043                          * authentication if we are already authenticated. As a
2044                          * workaround, force deauthentication and try again.
2045                          */
2046                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2047                                    "after forced deauthentication");
2048                         wpa_driver_nl80211_deauthenticate(
2049                                 drv, params->bssid,
2050                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2051                         nlmsg_free(msg);
2052                         goto retry;
2053                 }
2054                 goto nla_put_failure;
2055         }
2056         ret = 0;
2057         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2058                    "successfully");
2059
2060 nla_put_failure:
2061         nlmsg_free(msg);
2062         return ret;
2063 }
2064
2065
2066 struct phy_info_arg {
2067         u16 *num_modes;
2068         struct hostapd_hw_modes *modes;
2069 };
2070
2071 static int phy_info_handler(struct nl_msg *msg, void *arg)
2072 {
2073         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2074         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2075         struct phy_info_arg *phy_info = arg;
2076
2077         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2078
2079         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2080         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2081                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2082                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2083                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2084                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2085                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2086                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2087         };
2088
2089         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2090         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2091                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2092                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2093         };
2094
2095         struct nlattr *nl_band;
2096         struct nlattr *nl_freq;
2097         struct nlattr *nl_rate;
2098         int rem_band, rem_freq, rem_rate;
2099         struct hostapd_hw_modes *mode;
2100         int idx, mode_is_set;
2101
2102         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2103                   genlmsg_attrlen(gnlh, 0), NULL);
2104
2105         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2106                 return NL_SKIP;
2107
2108         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2109                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2110                 if (!mode)
2111                         return NL_SKIP;
2112                 phy_info->modes = mode;
2113
2114                 mode_is_set = 0;
2115
2116                 mode = &phy_info->modes[*(phy_info->num_modes)];
2117                 memset(mode, 0, sizeof(*mode));
2118                 *(phy_info->num_modes) += 1;
2119
2120                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2121                           nla_len(nl_band), NULL);
2122
2123                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2124                         mode->ht_capab = nla_get_u16(
2125                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2126                 }
2127
2128                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2129                         mode->a_mpdu_params |= nla_get_u8(
2130                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2131                                 0x03;
2132                 }
2133
2134                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2135                         mode->a_mpdu_params |= nla_get_u8(
2136                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2137                                 2;
2138                 }
2139
2140                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2141                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2142                         u8 *mcs;
2143                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2144                         os_memcpy(mode->mcs_set, mcs, 16);
2145                 }
2146
2147                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2148                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2149                                   nla_len(nl_freq), freq_policy);
2150                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2151                                 continue;
2152                         mode->num_channels++;
2153                 }
2154
2155                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2156                 if (!mode->channels)
2157                         return NL_SKIP;
2158
2159                 idx = 0;
2160
2161                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2162                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2163                                   nla_len(nl_freq), freq_policy);
2164                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2165                                 continue;
2166
2167                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2168                         mode->channels[idx].flag = 0;
2169
2170                         if (!mode_is_set) {
2171                                 /* crude heuristic */
2172                                 if (mode->channels[idx].freq < 4000)
2173                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2174                                 else
2175                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2176                                 mode_is_set = 1;
2177                         }
2178
2179                         /* crude heuristic */
2180                         if (mode->channels[idx].freq < 4000)
2181                                 if (mode->channels[idx].freq == 2484)
2182                                         mode->channels[idx].chan = 14;
2183                                 else
2184                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2185                         else
2186                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2187
2188                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2189                                 mode->channels[idx].flag |=
2190                                         HOSTAPD_CHAN_DISABLED;
2191                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2192                                 mode->channels[idx].flag |=
2193                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2194                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2195                                 mode->channels[idx].flag |=
2196                                         HOSTAPD_CHAN_NO_IBSS;
2197                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2198                                 mode->channels[idx].flag |=
2199                                         HOSTAPD_CHAN_RADAR;
2200
2201                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2202                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2203                                 mode->channels[idx].max_tx_power =
2204                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2205
2206                         idx++;
2207                 }
2208
2209                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2210                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2211                                   nla_len(nl_rate), rate_policy);
2212                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2213                                 continue;
2214                         mode->num_rates++;
2215                 }
2216
2217                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2218                 if (!mode->rates)
2219                         return NL_SKIP;
2220
2221                 idx = 0;
2222
2223                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2224                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2225                                   nla_len(nl_rate), rate_policy);
2226                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2227                                 continue;
2228                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2229
2230                         /* crude heuristic */
2231                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2232                             mode->rates[idx] > 200)
2233                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2234
2235                         idx++;
2236                 }
2237         }
2238
2239         return NL_SKIP;
2240 }
2241
2242 static struct hostapd_hw_modes *
2243 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2244 {
2245         u16 m;
2246         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2247         int i, mode11g_idx = -1;
2248
2249         /* If only 802.11g mode is included, use it to construct matching
2250          * 802.11b mode data. */
2251
2252         for (m = 0; m < *num_modes; m++) {
2253                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2254                         return modes; /* 802.11b already included */
2255                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2256                         mode11g_idx = m;
2257         }
2258
2259         if (mode11g_idx < 0)
2260                 return modes; /* 2.4 GHz band not supported at all */
2261
2262         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2263         if (nmodes == NULL)
2264                 return modes; /* Could not add 802.11b mode */
2265
2266         mode = &nmodes[*num_modes];
2267         os_memset(mode, 0, sizeof(*mode));
2268         (*num_modes)++;
2269         modes = nmodes;
2270
2271         mode->mode = HOSTAPD_MODE_IEEE80211B;
2272
2273         mode11g = &modes[mode11g_idx];
2274         mode->num_channels = mode11g->num_channels;
2275         mode->channels = os_malloc(mode11g->num_channels *
2276                                    sizeof(struct hostapd_channel_data));
2277         if (mode->channels == NULL) {
2278                 (*num_modes)--;
2279                 return modes; /* Could not add 802.11b mode */
2280         }
2281         os_memcpy(mode->channels, mode11g->channels,
2282                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2283
2284         mode->num_rates = 0;
2285         mode->rates = os_malloc(4 * sizeof(int));
2286         if (mode->rates == NULL) {
2287                 os_free(mode->channels);
2288                 (*num_modes)--;
2289                 return modes; /* Could not add 802.11b mode */
2290         }
2291
2292         for (i = 0; i < mode11g->num_rates; i++) {
2293                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2294                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2295                         continue;
2296                 mode->rates[mode->num_rates] = mode11g->rates[i];
2297                 mode->num_rates++;
2298                 if (mode->num_rates == 4)
2299                         break;
2300         }
2301
2302         if (mode->num_rates == 0) {
2303                 os_free(mode->channels);
2304                 os_free(mode->rates);
2305                 (*num_modes)--;
2306                 return modes; /* No 802.11b rates */
2307         }
2308
2309         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2310                    "information");
2311
2312         return modes;
2313 }
2314
2315
2316 static struct hostapd_hw_modes *
2317 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2318 {
2319         struct wpa_driver_nl80211_data *drv = priv;
2320         struct nl_msg *msg;
2321         struct phy_info_arg result = {
2322                 .num_modes = num_modes,
2323                 .modes = NULL,
2324         };
2325
2326         *num_modes = 0;
2327         *flags = 0;
2328
2329         msg = nlmsg_alloc();
2330         if (!msg)
2331                 return NULL;
2332
2333         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2334                     0, NL80211_CMD_GET_WIPHY, 0);
2335
2336         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2337
2338         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2339                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2340  nla_put_failure:
2341         return NULL;
2342 }
2343
2344
2345 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2346                                          const void *data, size_t len,
2347                                          int encrypt)
2348 {
2349         __u8 rtap_hdr[] = {
2350                 0x00, 0x00, /* radiotap version */
2351                 0x0e, 0x00, /* radiotap length */
2352                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2353                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2354                 0x00,       /* padding */
2355                 0x00, 0x00, /* RX and TX flags to indicate that */
2356                 0x00, 0x00, /* this is the injected frame directly */
2357         };
2358         struct iovec iov[2] = {
2359                 {
2360                         .iov_base = &rtap_hdr,
2361                         .iov_len = sizeof(rtap_hdr),
2362                 },
2363                 {
2364                         .iov_base = (void *) data,
2365                         .iov_len = len,
2366                 }
2367         };
2368         struct msghdr msg = {
2369                 .msg_name = NULL,
2370                 .msg_namelen = 0,
2371                 .msg_iov = iov,
2372                 .msg_iovlen = 2,
2373                 .msg_control = NULL,
2374                 .msg_controllen = 0,
2375                 .msg_flags = 0,
2376         };
2377
2378         if (encrypt)
2379                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2380
2381         return sendmsg(drv->monitor_sock, &msg, 0);
2382 }
2383
2384
2385 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2386                                         size_t data_len)
2387 {
2388         struct wpa_driver_nl80211_data *drv = priv;
2389         struct ieee80211_mgmt *mgmt;
2390         int encrypt = 1;
2391         u16 fc;
2392
2393         mgmt = (struct ieee80211_mgmt *) data;
2394         fc = le_to_host16(mgmt->frame_control);
2395
2396         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2397             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2398                 /*
2399                  * Only one of the authentication frame types is encrypted.
2400                  * In order for static WEP encryption to work properly (i.e.,
2401                  * to not encrypt the frame), we need to tell mac80211 about
2402                  * the frames that must not be encrypted.
2403                  */
2404                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2405                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2406                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2407                         encrypt = 0;
2408         }
2409
2410         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2411 }
2412
2413
2414 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2415                                          const u8 *head, size_t head_len,
2416                                          const u8 *tail, size_t tail_len,
2417                                          int dtim_period, int beacon_int)
2418 {
2419         struct wpa_driver_nl80211_data *drv = priv;
2420         struct nl_msg *msg;
2421         u8 cmd = NL80211_CMD_NEW_BEACON;
2422         int ret;
2423         int beacon_set;
2424         int ifindex = if_nametoindex(ifname);
2425 #ifdef HOSTAPD
2426         struct i802_bss *bss;
2427
2428         bss = get_bss(drv, ifindex);
2429         if (bss == NULL)
2430                 return -ENOENT;
2431         beacon_set = bss->beacon_set;
2432 #else /* HOSTAPD */
2433         beacon_set = drv->beacon_set;
2434 #endif /* HOSTAPD */
2435
2436         msg = nlmsg_alloc();
2437         if (!msg)
2438                 return -ENOMEM;
2439
2440         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2441                    beacon_set);
2442         if (beacon_set)
2443                 cmd = NL80211_CMD_SET_BEACON;
2444
2445         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2446                     0, cmd, 0);
2447         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2448         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2449         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2450         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2451         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2452
2453         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2454         if (ret) {
2455                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2456                            ret, strerror(-ret));
2457         } else {
2458 #ifdef HOSTAPD
2459                 bss->beacon_set = 1;
2460 #else /* HOSTAPD */
2461                 drv->beacon_set = 1;
2462 #endif /* HOSTAPD */
2463         }
2464         return ret;
2465  nla_put_failure:
2466         return -ENOBUFS;
2467 }
2468
2469
2470 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2471                                        int freq, int ht_enabled,
2472                                        int sec_channel_offset)
2473 {
2474         struct nl_msg *msg;
2475         int ret;
2476
2477         msg = nlmsg_alloc();
2478         if (!msg)
2479                 return -1;
2480
2481         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2482                     NL80211_CMD_SET_WIPHY, 0);
2483
2484         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2485         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2486         if (ht_enabled) {
2487                 switch (sec_channel_offset) {
2488                 case -1:
2489                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2490                                     NL80211_CHAN_HT40MINUS);
2491                         break;
2492                 case 1:
2493                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2494                                     NL80211_CHAN_HT40PLUS);
2495                         break;
2496                 default:
2497                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2498                                     NL80211_CHAN_HT20);
2499                         break;
2500                 }
2501         }
2502
2503         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2504         if (ret == 0)
2505                 return 0;
2506         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2507                    "%d (%s)", freq, ret, strerror(-ret));
2508 nla_put_failure:
2509         return -1;
2510 }
2511
2512
2513 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2514                                       struct hostapd_sta_add_params *params)
2515 {
2516         struct wpa_driver_nl80211_data *drv = priv;
2517         struct nl_msg *msg;
2518         int ret = -ENOBUFS;
2519
2520         msg = nlmsg_alloc();
2521         if (!msg)
2522                 return -ENOMEM;
2523
2524         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2525                     0, NL80211_CMD_NEW_STATION, 0);
2526
2527         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2528         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2529         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2530         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2531                 params->supp_rates);
2532         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2533                     params->listen_interval);
2534         if (params->ht_capabilities) {
2535                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2536                         sizeof(*params->ht_capabilities),
2537                         params->ht_capabilities);
2538         }
2539
2540         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2541         if (ret)
2542                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2543                            "result: %d (%s)", ret, strerror(-ret));
2544         if (ret == -EEXIST)
2545                 ret = 0;
2546  nla_put_failure:
2547         return ret;
2548 }
2549
2550
2551 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2552 {
2553         struct wpa_driver_nl80211_data *drv = priv;
2554         struct nl_msg *msg;
2555         int ret;
2556
2557         msg = nlmsg_alloc();
2558         if (!msg)
2559                 return -ENOMEM;
2560
2561         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2562                     0, NL80211_CMD_DEL_STATION, 0);
2563
2564         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2565                     if_nametoindex(drv->ifname));
2566         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2567
2568         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2569         if (ret == -ENOENT)
2570                 return 0;
2571         return ret;
2572  nla_put_failure:
2573         return -ENOBUFS;
2574 }
2575
2576
2577 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2578                                  int ifidx)
2579 {
2580         struct nl_msg *msg;
2581
2582         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
2583
2584 #ifdef HOSTAPD
2585         /* stop listening for EAPOL on this interface */
2586         del_ifidx(drv, ifidx);
2587 #endif /* HOSTAPD */
2588
2589         msg = nlmsg_alloc();
2590         if (!msg)
2591                 goto nla_put_failure;
2592
2593         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2594                     0, NL80211_CMD_DEL_INTERFACE, 0);
2595         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2596
2597         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2598                 return;
2599  nla_put_failure:
2600         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2601                    ifidx);
2602 }
2603
2604
2605 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2606                                      const char *ifname,
2607                                      enum nl80211_iftype iftype,
2608                                      const u8 *addr, int wds)
2609 {
2610         struct nl_msg *msg, *flags = NULL;
2611         int ifidx;
2612         int ret = -ENOBUFS;
2613
2614         msg = nlmsg_alloc();
2615         if (!msg)
2616                 return -1;
2617
2618         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2619                     0, NL80211_CMD_NEW_INTERFACE, 0);
2620         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2621         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2622         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2623
2624         if (iftype == NL80211_IFTYPE_MONITOR) {
2625                 int err;
2626
2627                 flags = nlmsg_alloc();
2628                 if (!flags)
2629                         goto nla_put_failure;
2630
2631                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2632
2633                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2634
2635                 nlmsg_free(flags);
2636
2637                 if (err)
2638                         goto nla_put_failure;
2639         } else if (wds) {
2640                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
2641         }
2642
2643         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2644         if (ret) {
2645  nla_put_failure:
2646                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2647                            ifname, ret, strerror(-ret));
2648                 return ret;
2649         }
2650
2651         ifidx = if_nametoindex(ifname);
2652         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
2653                    ifname, ifidx);
2654
2655         if (ifidx <= 0)
2656                 return -1;
2657
2658 #ifdef HOSTAPD
2659         /* start listening for EAPOL on this interface */
2660         add_ifidx(drv, ifidx);
2661
2662         if (addr && iftype == NL80211_IFTYPE_AP &&
2663             set_ifhwaddr(drv, ifname, addr)) {
2664                 nl80211_remove_iface(drv, ifidx);
2665                 return -1;
2666         }
2667 #endif /* HOSTAPD */
2668
2669         return ifidx;
2670 }
2671
2672
2673 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2674                                 const char *ifname, enum nl80211_iftype iftype,
2675                                 const u8 *addr, int wds)
2676 {
2677         int ret;
2678
2679         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
2680
2681         /* if error occured and interface exists already */
2682         if (ret == -ENFILE && if_nametoindex(ifname)) {
2683                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2684
2685                 /* Try to remove the interface that was already there. */
2686                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2687
2688                 /* Try to create the interface again */
2689                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
2690                                                 wds);
2691         }
2692
2693         return ret;
2694 }
2695
2696
2697 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2698 {
2699         struct ieee80211_hdr *hdr;
2700         u16 fc;
2701         union wpa_event_data event;
2702
2703         hdr = (struct ieee80211_hdr *) buf;
2704         fc = le_to_host16(hdr->frame_control);
2705
2706         os_memset(&event, 0, sizeof(event));
2707         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
2708         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
2709         event.tx_status.dst = hdr->addr1;
2710         event.tx_status.data = buf;
2711         event.tx_status.data_len = len;
2712         event.tx_status.ack = ok;
2713         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
2714 }
2715
2716
2717 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2718                              struct ieee80211_hdr *hdr, size_t len)
2719 {
2720         union wpa_event_data event;
2721         os_memset(&event, 0, sizeof(event));
2722         event.rx_from_unknown.hdr = hdr;
2723         event.rx_from_unknown.len = len;
2724         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
2725 }
2726
2727
2728 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2729                          u8 *buf, size_t len,
2730                          struct hostapd_frame_info *hfi)
2731 {
2732         struct ieee80211_hdr *hdr;
2733         u16 fc;
2734         union wpa_event_data event;
2735
2736         hdr = (struct ieee80211_hdr *) buf;
2737         fc = le_to_host16(hdr->frame_control);
2738
2739         switch (WLAN_FC_GET_TYPE(fc)) {
2740         case WLAN_FC_TYPE_MGMT:
2741                 os_memset(&event, 0, sizeof(event));
2742                 event.rx_mgmt.frame = buf;
2743                 event.rx_mgmt.frame_len = len;
2744                 event.rx_mgmt.fi = hfi;
2745                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
2746                 break;
2747         case WLAN_FC_TYPE_CTRL:
2748                 /* can only get here with PS-Poll frames */
2749                 wpa_printf(MSG_DEBUG, "CTRL");
2750                 from_unknown_sta(drv, hdr, len);
2751                 break;
2752         case WLAN_FC_TYPE_DATA:
2753                 from_unknown_sta(drv, hdr, len);
2754                 break;
2755         }
2756 }
2757
2758
2759 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2760 {
2761         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2762         int len;
2763         unsigned char buf[3000];
2764         struct ieee80211_radiotap_iterator iter;
2765         int ret;
2766         struct hostapd_frame_info hfi;
2767         int injected = 0, failed = 0, rxflags = 0;
2768
2769         len = recv(sock, buf, sizeof(buf), 0);
2770         if (len < 0) {
2771                 perror("recv");
2772                 return;
2773         }
2774
2775         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2776                 printf("received invalid radiotap frame\n");
2777                 return;
2778         }
2779
2780         memset(&hfi, 0, sizeof(hfi));
2781
2782         while (1) {
2783                 ret = ieee80211_radiotap_iterator_next(&iter);
2784                 if (ret == -ENOENT)
2785                         break;
2786                 if (ret) {
2787                         printf("received invalid radiotap frame (%d)\n", ret);
2788                         return;
2789                 }
2790                 switch (iter.this_arg_index) {
2791                 case IEEE80211_RADIOTAP_FLAGS:
2792                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2793                                 len -= 4;
2794                         break;
2795                 case IEEE80211_RADIOTAP_RX_FLAGS:
2796                         rxflags = 1;
2797                         break;
2798                 case IEEE80211_RADIOTAP_TX_FLAGS:
2799                         injected = 1;
2800                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2801                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2802                         break;
2803                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2804                         break;
2805                 case IEEE80211_RADIOTAP_CHANNEL:
2806                         /* TODO convert from freq/flags to channel number
2807                         hfi.channel = XXX;
2808                          */
2809                         break;
2810                 case IEEE80211_RADIOTAP_RATE:
2811                         hfi.datarate = *iter.this_arg * 5;
2812                         break;
2813                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2814                         hfi.ssi_signal = *iter.this_arg;
2815                         break;
2816                 }
2817         }
2818
2819         if (rxflags && injected)
2820                 return;
2821
2822         if (!injected)
2823                 handle_frame(drv, buf + iter.max_length,
2824                              len - iter.max_length, &hfi);
2825         else
2826                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2827                                    len - iter.max_length, !failed);
2828 }
2829
2830
2831 /*
2832  * we post-process the filter code later and rewrite
2833  * this to the offset to the last instruction
2834  */
2835 #define PASS    0xFF
2836 #define FAIL    0xFE
2837
2838 static struct sock_filter msock_filter_insns[] = {
2839         /*
2840          * do a little-endian load of the radiotap length field
2841          */
2842         /* load lower byte into A */
2843         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2844         /* put it into X (== index register) */
2845         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2846         /* load upper byte into A */
2847         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2848         /* left-shift it by 8 */
2849         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2850         /* or with X */
2851         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2852         /* put result into X */
2853         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2854
2855         /*
2856          * Allow management frames through, this also gives us those
2857          * management frames that we sent ourselves with status
2858          */
2859         /* load the lower byte of the IEEE 802.11 frame control field */
2860         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2861         /* mask off frame type and version */
2862         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2863         /* accept frame if it's both 0, fall through otherwise */
2864         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2865
2866         /*
2867          * TODO: add a bit to radiotap RX flags that indicates
2868          * that the sending station is not associated, then
2869          * add a filter here that filters on our DA and that flag
2870          * to allow us to deauth frames to that bad station.
2871          *
2872          * Not a regression -- we didn't do it before either.
2873          */
2874
2875 #if 0
2876         /*
2877          * drop non-data frames
2878          */
2879         /* load the lower byte of the frame control field */
2880         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2881         /* mask off QoS bit */
2882         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2883         /* drop non-data frames */
2884         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2885 #endif
2886         /* load the upper byte of the frame control field */
2887         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
2888         /* mask off toDS/fromDS */
2889         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2890         /* accept WDS frames */
2891         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
2892
2893         /*
2894          * add header length to index
2895          */
2896         /* load the lower byte of the frame control field */
2897         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2898         /* mask off QoS bit */
2899         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2900         /* right shift it by 6 to give 0 or 2 */
2901         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2902         /* add data frame header length */
2903         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2904         /* add index, was start of 802.11 header */
2905         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2906         /* move to index, now start of LL header */
2907         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2908
2909         /*
2910          * Accept empty data frames, we use those for
2911          * polling activity.
2912          */
2913         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2914         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2915
2916         /*
2917          * Accept EAPOL frames
2918          */
2919         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2920         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2921         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2922         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2923
2924         /* keep these last two statements or change the code below */
2925         /* return 0 == "DROP" */
2926         BPF_STMT(BPF_RET | BPF_K, 0),
2927         /* return ~0 == "keep all" */
2928         BPF_STMT(BPF_RET | BPF_K, ~0),
2929 };
2930
2931 static struct sock_fprog msock_filter = {
2932         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2933         .filter = msock_filter_insns,
2934 };
2935
2936
2937 static int add_monitor_filter(int s)
2938 {
2939         int idx;
2940
2941         /* rewrite all PASS/FAIL jump offsets */
2942         for (idx = 0; idx < msock_filter.len; idx++) {
2943                 struct sock_filter *insn = &msock_filter_insns[idx];
2944
2945                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2946                         if (insn->code == (BPF_JMP|BPF_JA)) {
2947                                 if (insn->k == PASS)
2948                                         insn->k = msock_filter.len - idx - 2;
2949                                 else if (insn->k == FAIL)
2950                                         insn->k = msock_filter.len - idx - 3;
2951                         }
2952
2953                         if (insn->jt == PASS)
2954                                 insn->jt = msock_filter.len - idx - 2;
2955                         else if (insn->jt == FAIL)
2956                                 insn->jt = msock_filter.len - idx - 3;
2957
2958                         if (insn->jf == PASS)
2959                                 insn->jf = msock_filter.len - idx - 2;
2960                         else if (insn->jf == FAIL)
2961                                 insn->jf = msock_filter.len - idx - 3;
2962                 }
2963         }
2964
2965         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2966                        &msock_filter, sizeof(msock_filter))) {
2967                 perror("SO_ATTACH_FILTER");
2968                 return -1;
2969         }
2970
2971         return 0;
2972 }
2973
2974
2975 static void nl80211_remove_monitor_interface(
2976         struct wpa_driver_nl80211_data *drv)
2977 {
2978         if (drv->monitor_ifidx >= 0) {
2979                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2980                 drv->monitor_ifidx = -1;
2981         }
2982 }
2983
2984
2985 static int
2986 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2987 {
2988         char buf[IFNAMSIZ];
2989         struct sockaddr_ll ll;
2990         int optval;
2991         socklen_t optlen;
2992
2993         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2994         buf[IFNAMSIZ - 1] = '\0';
2995
2996         drv->monitor_ifidx =
2997                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
2998                                      0);
2999
3000         if (drv->monitor_ifidx < 0)
3001                 return -1;
3002
3003         if (hostapd_set_iface_flags(drv, buf, 1))
3004                 goto error;
3005
3006         memset(&ll, 0, sizeof(ll));
3007         ll.sll_family = AF_PACKET;
3008         ll.sll_ifindex = drv->monitor_ifidx;
3009         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3010         if (drv->monitor_sock < 0) {
3011                 perror("socket[PF_PACKET,SOCK_RAW]");
3012                 goto error;
3013         }
3014
3015         if (add_monitor_filter(drv->monitor_sock)) {
3016                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3017                            "interface; do filtering in user space");
3018                 /* This works, but will cost in performance. */
3019         }
3020
3021         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3022                 perror("monitor socket bind");
3023                 goto error;
3024         }
3025
3026         optlen = sizeof(optval);
3027         optval = 20;
3028         if (setsockopt
3029             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3030                 perror("Failed to set socket priority");
3031                 goto error;
3032         }
3033
3034         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3035                                      drv, NULL)) {
3036                 printf("Could not register monitor read socket\n");
3037                 goto error;
3038         }
3039
3040         return 0;
3041  error:
3042         nl80211_remove_monitor_interface(drv);
3043         return -1;
3044 }
3045
3046
3047 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3048
3049 static int wpa_driver_nl80211_hapd_send_eapol(
3050         void *priv, const u8 *addr, const u8 *data,
3051         size_t data_len, int encrypt, const u8 *own_addr)
3052 {
3053         struct wpa_driver_nl80211_data *drv = priv;
3054         struct ieee80211_hdr *hdr;
3055         size_t len;
3056         u8 *pos;
3057         int res;
3058 #if 0 /* FIX */
3059         int qos = sta->flags & WPA_STA_WMM;
3060 #else
3061         int qos = 0;
3062 #endif
3063
3064         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3065                 data_len;
3066         hdr = os_zalloc(len);
3067         if (hdr == NULL) {
3068                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3069                        (unsigned long) len);
3070                 return -1;
3071         }
3072
3073         hdr->frame_control =
3074                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3075         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3076         if (encrypt)
3077                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3078 #if 0 /* To be enabled if qos determination is added above */
3079         if (qos) {
3080                 hdr->frame_control |=
3081                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3082         }
3083 #endif
3084
3085         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3086         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3087         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3088         pos = (u8 *) (hdr + 1);
3089
3090 #if 0 /* To be enabled if qos determination is added above */
3091         if (qos) {
3092                 /* add an empty QoS header if needed */
3093                 pos[0] = 0;
3094                 pos[1] = 0;
3095                 pos += 2;
3096         }
3097 #endif
3098
3099         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3100         pos += sizeof(rfc1042_header);
3101         WPA_PUT_BE16(pos, ETH_P_PAE);
3102         pos += 2;
3103         memcpy(pos, data, data_len);
3104
3105         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3106         if (res < 0) {
3107                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3108                            "failed: %d (%s)",
3109                            (unsigned long) len, errno, strerror(errno));
3110         }
3111         os_free(hdr);
3112
3113         return res;
3114 }
3115
3116
3117 static u32 sta_flags_nl80211(int flags)
3118 {
3119         u32 f = 0;
3120
3121         if (flags & WPA_STA_AUTHORIZED)
3122                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3123         if (flags & WPA_STA_WMM)
3124                 f |= BIT(NL80211_STA_FLAG_WME);
3125         if (flags & WPA_STA_SHORT_PREAMBLE)
3126                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3127         if (flags & WPA_STA_MFP)
3128                 f |= BIT(NL80211_STA_FLAG_MFP);
3129
3130         return f;
3131 }
3132
3133
3134 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3135                                             int total_flags, int flags_or,
3136                                             int flags_and)
3137 {
3138         struct wpa_driver_nl80211_data *drv = priv;
3139         struct nl_msg *msg, *flags = NULL;
3140         struct nl80211_sta_flag_update upd;
3141
3142         msg = nlmsg_alloc();
3143         if (!msg)
3144                 return -ENOMEM;
3145
3146         flags = nlmsg_alloc();
3147         if (!flags) {
3148                 nlmsg_free(msg);
3149                 return -ENOMEM;
3150         }
3151
3152         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3153                     0, NL80211_CMD_SET_STATION, 0);
3154
3155         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3156                     if_nametoindex(drv->ifname));
3157         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3158
3159         /*
3160          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3161          * can be removed eventually.
3162          */
3163         if (total_flags & WPA_STA_AUTHORIZED)
3164                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3165
3166         if (total_flags & WPA_STA_WMM)
3167                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3168
3169         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3170                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3171
3172         if (total_flags & WPA_STA_MFP)
3173                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3174
3175         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3176                 goto nla_put_failure;
3177
3178         os_memset(&upd, 0, sizeof(upd));
3179         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3180         upd.set = sta_flags_nl80211(flags_or);
3181         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3182
3183         nlmsg_free(flags);
3184
3185         return send_and_recv_msgs(drv, msg, NULL, NULL);
3186  nla_put_failure:
3187         nlmsg_free(flags);
3188         return -ENOBUFS;
3189 }
3190
3191
3192 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3193                                  struct wpa_driver_associate_params *params)
3194 {
3195         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3196             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3197                 nl80211_remove_monitor_interface(drv);
3198                 return -1;
3199         }
3200
3201         /* TODO: setup monitor interface (and add code somewhere to remove this
3202          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3203
3204         return 0;
3205 }
3206
3207
3208 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3209 {
3210         struct nl_msg *msg;
3211         int ret = -1;
3212
3213         msg = nlmsg_alloc();
3214         if (!msg)
3215                 return -1;
3216
3217         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3218                     NL80211_CMD_LEAVE_IBSS, 0);
3219         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3220         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3221         msg = NULL;
3222         if (ret) {
3223                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3224                            "(%s)", ret, strerror(-ret));
3225                 goto nla_put_failure;
3226         }
3227
3228         ret = 0;
3229         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3230
3231 nla_put_failure:
3232         nlmsg_free(msg);
3233         return ret;
3234 }
3235
3236
3237 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3238                                    struct wpa_driver_associate_params *params)
3239 {
3240         struct nl_msg *msg;
3241         int ret = -1;
3242         int count = 0;
3243
3244         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3245
3246         if (wpa_driver_nl80211_set_mode(drv, params->mode)) {
3247                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3248                            "IBSS mode");
3249                 return -1;
3250         }
3251
3252 retry:
3253         msg = nlmsg_alloc();
3254         if (!msg)
3255                 return -1;
3256
3257         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3258                     NL80211_CMD_JOIN_IBSS, 0);
3259         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3260
3261         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3262                 goto nla_put_failure;
3263
3264         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3265                           params->ssid, params->ssid_len);
3266         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3267                 params->ssid);
3268         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3269         drv->ssid_len = params->ssid_len;
3270
3271         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3272         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3273
3274         ret = nl80211_set_conn_keys(params, msg);
3275         if (ret)
3276                 goto nla_put_failure;
3277
3278         if (params->wpa_ie) {
3279                 wpa_hexdump(MSG_DEBUG,
3280                             "  * Extra IEs for Beacon/Probe Response frames",
3281                             params->wpa_ie, params->wpa_ie_len);
3282                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3283                         params->wpa_ie);
3284         }
3285
3286         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3287         msg = NULL;
3288         if (ret) {
3289                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3290                            ret, strerror(-ret));
3291                 count++;
3292                 if (ret == -EALREADY && count == 1) {
3293                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3294                                    "forced leave");
3295                         nl80211_leave_ibss(drv);
3296                         nlmsg_free(msg);
3297                         goto retry;
3298                 }
3299
3300                 goto nla_put_failure;
3301         }
3302         ret = 0;
3303         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3304
3305 nla_put_failure:
3306         nlmsg_free(msg);
3307         return ret;
3308 }
3309
3310
3311 static int wpa_driver_nl80211_connect(
3312         struct wpa_driver_nl80211_data *drv,
3313         struct wpa_driver_associate_params *params)
3314 {
3315         struct nl_msg *msg;
3316         enum nl80211_auth_type type;
3317         int ret = 0;
3318
3319         msg = nlmsg_alloc();
3320         if (!msg)
3321                 return -1;
3322
3323         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3324         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3325                     NL80211_CMD_CONNECT, 0);
3326
3327         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3328         if (params->bssid) {
3329                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3330                            MAC2STR(params->bssid));
3331                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3332         }
3333         if (params->freq) {
3334                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3335                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3336         }
3337         if (params->ssid) {
3338                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3339                                   params->ssid, params->ssid_len);
3340                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3341                         params->ssid);
3342                 if (params->ssid_len > sizeof(drv->ssid))
3343                         goto nla_put_failure;
3344                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3345                 drv->ssid_len = params->ssid_len;
3346         }
3347         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3348         if (params->wpa_ie)
3349                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3350                         params->wpa_ie);
3351
3352         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3353                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3354         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3355                 type = NL80211_AUTHTYPE_SHARED_KEY;
3356         else if (params->auth_alg & AUTH_ALG_LEAP)
3357                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3358         else if (params->auth_alg & AUTH_ALG_FT)
3359                 type = NL80211_AUTHTYPE_FT;
3360         else
3361                 goto nla_put_failure;
3362
3363         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3364         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3365
3366         if (params->wpa_ie && params->wpa_ie_len) {
3367                 enum nl80211_wpa_versions ver;
3368
3369                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3370                         ver = NL80211_WPA_VERSION_2;
3371                 else
3372                         ver = NL80211_WPA_VERSION_1;
3373
3374                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3375                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3376         }
3377
3378         if (params->pairwise_suite != CIPHER_NONE) {
3379                 int cipher;
3380
3381                 switch (params->pairwise_suite) {
3382                 case CIPHER_WEP40:
3383                         cipher = WLAN_CIPHER_SUITE_WEP40;
3384                         break;
3385                 case CIPHER_WEP104:
3386                         cipher = WLAN_CIPHER_SUITE_WEP104;
3387                         break;
3388                 case CIPHER_CCMP:
3389                         cipher = WLAN_CIPHER_SUITE_CCMP;
3390                         break;
3391                 case CIPHER_TKIP:
3392                 default:
3393                         cipher = WLAN_CIPHER_SUITE_TKIP;
3394                         break;
3395                 }
3396                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3397         }
3398
3399         if (params->group_suite != CIPHER_NONE) {
3400                 int cipher;
3401
3402                 switch (params->group_suite) {
3403                 case CIPHER_WEP40:
3404                         cipher = WLAN_CIPHER_SUITE_WEP40;
3405                         break;
3406                 case CIPHER_WEP104:
3407                         cipher = WLAN_CIPHER_SUITE_WEP104;
3408                         break;
3409                 case CIPHER_CCMP:
3410                         cipher = WLAN_CIPHER_SUITE_CCMP;
3411                         break;
3412                 case CIPHER_TKIP:
3413                 default:
3414                         cipher = WLAN_CIPHER_SUITE_TKIP;
3415                         break;
3416                 }
3417                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3418         }
3419
3420         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3421             params->key_mgmt_suite == KEY_MGMT_PSK) {
3422                 int mgmt = WLAN_AKM_SUITE_PSK;
3423
3424                 switch (params->key_mgmt_suite) {
3425                 case KEY_MGMT_802_1X:
3426                         mgmt = WLAN_AKM_SUITE_8021X;
3427                         break;
3428                 case KEY_MGMT_PSK:
3429                 default:
3430                         mgmt = WLAN_AKM_SUITE_PSK;
3431                         break;
3432                 }
3433                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3434         }
3435
3436         ret = nl80211_set_conn_keys(params, msg);
3437         if (ret)
3438                 goto nla_put_failure;
3439
3440         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3441         msg = NULL;
3442         if (ret) {
3443                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3444                            "(%s)", ret, strerror(-ret));
3445                 goto nla_put_failure;
3446         }
3447         ret = 0;
3448         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3449
3450 nla_put_failure:
3451         nlmsg_free(msg);
3452         return ret;
3453
3454 }
3455
3456
3457 static int wpa_driver_nl80211_associate(
3458         void *priv, struct wpa_driver_associate_params *params)
3459 {
3460         struct wpa_driver_nl80211_data *drv = priv;
3461         int ret = -1;
3462         struct nl_msg *msg;
3463
3464         if (params->mode == IEEE80211_MODE_AP)
3465                 return wpa_driver_nl80211_ap(drv, params);
3466
3467         if (params->mode == IEEE80211_MODE_IBSS)
3468                 return wpa_driver_nl80211_ibss(drv, params);
3469
3470         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3471                 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3472                         return -1;
3473                 return wpa_driver_nl80211_connect(drv, params);
3474         }
3475
3476         drv->associated = 0;
3477
3478         msg = nlmsg_alloc();
3479         if (!msg)
3480                 return -1;
3481
3482         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3483                    drv->ifindex);
3484         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3485                     NL80211_CMD_ASSOCIATE, 0);
3486
3487         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3488         if (params->bssid) {
3489                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3490                            MAC2STR(params->bssid));
3491                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3492         }
3493         if (params->freq) {
3494                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3495                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3496                 drv->assoc_freq = params->freq;
3497         } else
3498                 drv->assoc_freq = 0;
3499         if (params->ssid) {
3500                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3501                                   params->ssid, params->ssid_len);
3502                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3503                         params->ssid);
3504                 if (params->ssid_len > sizeof(drv->ssid))
3505                         goto nla_put_failure;
3506                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3507                 drv->ssid_len = params->ssid_len;
3508         }
3509         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3510         if (params->wpa_ie)
3511                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3512                         params->wpa_ie);
3513
3514 #ifdef CONFIG_IEEE80211W
3515         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3516                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3517 #endif /* CONFIG_IEEE80211W */
3518
3519         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3520
3521         if (params->prev_bssid) {
3522                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3523                            MAC2STR(params->prev_bssid));
3524                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3525                         params->prev_bssid);
3526         }
3527
3528         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3529         msg = NULL;
3530         if (ret) {
3531                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3532                            "(%s)", ret, strerror(-ret));
3533                 goto nla_put_failure;
3534         }
3535         ret = 0;
3536         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3537                    "successfully");
3538
3539 nla_put_failure:
3540         nlmsg_free(msg);
3541         return ret;
3542 }
3543
3544
3545 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3546                             int ifindex, int mode)
3547 {
3548         struct nl_msg *msg;
3549         int ret = -ENOBUFS;
3550
3551         msg = nlmsg_alloc();
3552         if (!msg)
3553                 return -ENOMEM;
3554
3555         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3556                     0, NL80211_CMD_SET_INTERFACE, 0);
3557         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3558         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3559
3560         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3561         if (!ret)
3562                 return 0;
3563 nla_put_failure:
3564         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3565                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3566         return ret;
3567 }
3568
3569
3570 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3571 {
3572         struct wpa_driver_nl80211_data *drv = priv;
3573         int ret = -1;
3574         int nlmode;
3575
3576         switch (mode) {
3577         case 0:
3578                 nlmode = NL80211_IFTYPE_STATION;
3579                 break;
3580         case 1:
3581                 nlmode = NL80211_IFTYPE_ADHOC;
3582                 break;
3583         case 2:
3584                 nlmode = NL80211_IFTYPE_AP;
3585                 break;
3586         default:
3587                 return -1;
3588         }
3589
3590         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3591                 drv->nlmode = nlmode;
3592                 ret = 0;
3593                 goto done;
3594         }
3595
3596         if (nlmode == drv->nlmode) {
3597                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
3598                            "requested mode - ignore error");
3599                 ret = 0;
3600                 goto done; /* Already in the requested mode */
3601         }
3602
3603         /* mac80211 doesn't allow mode changes while the device is up, so
3604          * take the device down, try to set the mode again, and bring the
3605          * device back up.
3606          */
3607         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3608                 /* Try to set the mode again while the interface is down */
3609                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3610                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3611                         ret = -1;
3612         }
3613
3614         if (!ret) {
3615                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
3616                            "interface is down");
3617                 drv->nlmode = nlmode;
3618         }
3619
3620 done:
3621         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3622                 /* Setup additional AP mode functionality if needed */
3623                 if (drv->monitor_ifidx < 0 &&
3624                     nl80211_create_monitor_interface(drv))
3625                         return -1;
3626         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3627                 /* Remove additional AP mode functionality */
3628                 nl80211_remove_monitor_interface(drv);
3629         }
3630
3631         if (ret)
3632                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
3633                            "from %d failed", nlmode, drv->nlmode);
3634
3635         return ret;
3636 }
3637
3638
3639 static int wpa_driver_nl80211_get_capa(void *priv,
3640                                        struct wpa_driver_capa *capa)
3641 {
3642         struct wpa_driver_nl80211_data *drv = priv;
3643         if (!drv->has_capability)
3644                 return -1;
3645         os_memcpy(capa, &drv->capa, sizeof(*capa));
3646         return 0;
3647 }
3648
3649
3650 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3651 {
3652         struct wpa_driver_nl80211_data *drv = priv;
3653
3654         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3655                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3656         drv->operstate = state;
3657         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
3658                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
3659 }
3660
3661
3662 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3663 {
3664         struct wpa_driver_nl80211_data *drv = priv;
3665         struct nl_msg *msg;
3666         struct nl80211_sta_flag_update upd;
3667
3668         msg = nlmsg_alloc();
3669         if (!msg)
3670                 return -ENOMEM;
3671
3672         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3673                     0, NL80211_CMD_SET_STATION, 0);
3674
3675         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3676                     if_nametoindex(drv->ifname));
3677         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3678
3679         os_memset(&upd, 0, sizeof(upd));
3680         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3681         if (authorized)
3682                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3683         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3684
3685         return send_and_recv_msgs(drv, msg, NULL, NULL);
3686  nla_put_failure:
3687         return -ENOBUFS;
3688 }
3689
3690
3691 #ifdef HOSTAPD
3692
3693 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3694                                  int ifindex)
3695 {
3696         struct i802_bss *bss = &drv->bss;
3697         while (bss) {
3698                 if (ifindex == bss->ifindex)
3699                         return bss;
3700                 bss = bss->next;
3701         }
3702         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3703         return NULL;
3704 }
3705
3706
3707 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3708 {
3709         int i;
3710         int *old;
3711
3712         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3713                    ifidx);
3714         for (i = 0; i < drv->num_if_indices; i++) {
3715                 if (drv->if_indices[i] == 0) {
3716                         drv->if_indices[i] = ifidx;
3717                         return;
3718                 }
3719         }
3720
3721         if (drv->if_indices != drv->default_if_indices)
3722                 old = drv->if_indices;
3723         else
3724                 old = NULL;
3725
3726         drv->if_indices = os_realloc(old,
3727                                      sizeof(int) * (drv->num_if_indices + 1));
3728         if (!drv->if_indices) {
3729                 if (!old)
3730                         drv->if_indices = drv->default_if_indices;
3731                 else
3732                         drv->if_indices = old;
3733                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3734                            "interfaces");
3735                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3736                 return;
3737         }
3738         drv->if_indices[drv->num_if_indices] = ifidx;
3739         drv->num_if_indices++;
3740 }
3741
3742
3743 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3744 {
3745         int i;
3746
3747         for (i = 0; i < drv->num_if_indices; i++) {
3748                 if (drv->if_indices[i] == ifidx) {
3749                         drv->if_indices[i] = 0;
3750                         break;
3751                 }
3752         }
3753 }
3754
3755
3756 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3757 {
3758         int i;
3759
3760         for (i = 0; i < drv->num_if_indices; i++)
3761                 if (drv->if_indices[i] == ifidx)
3762                         return 1;
3763
3764         return 0;
3765 }
3766
3767
3768 static inline int min_int(int a, int b)
3769 {
3770         if (a < b)
3771                 return a;
3772         return b;
3773 }
3774
3775
3776 static int get_key_handler(struct nl_msg *msg, void *arg)
3777 {
3778         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3779         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3780
3781         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3782                   genlmsg_attrlen(gnlh, 0), NULL);
3783
3784         /*
3785          * TODO: validate the key index and mac address!
3786          * Otherwise, there's a race condition as soon as
3787          * the kernel starts sending key notifications.
3788          */
3789
3790         if (tb[NL80211_ATTR_KEY_SEQ])
3791                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3792                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3793         return NL_SKIP;
3794 }
3795
3796
3797 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3798                            int idx, u8 *seq)
3799 {
3800         struct wpa_driver_nl80211_data *drv = priv;
3801         struct nl_msg *msg;
3802
3803         msg = nlmsg_alloc();
3804         if (!msg)
3805                 return -ENOMEM;
3806
3807         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3808                     0, NL80211_CMD_GET_KEY, 0);
3809
3810         if (addr)
3811                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3812         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3813         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3814
3815         memset(seq, 0, 6);
3816
3817         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3818  nla_put_failure:
3819         return -ENOBUFS;
3820 }
3821
3822
3823 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3824                               int mode)
3825 {
3826         struct wpa_driver_nl80211_data *drv = priv;
3827         struct nl_msg *msg;
3828         u8 rates[NL80211_MAX_SUPP_RATES];
3829         u8 rates_len = 0;
3830         int i;
3831
3832         msg = nlmsg_alloc();
3833         if (!msg)
3834                 return -ENOMEM;
3835
3836         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3837                     NL80211_CMD_SET_BSS, 0);
3838
3839         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3840                 rates[rates_len++] = basic_rates[i] / 5;
3841
3842         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3843
3844         /* TODO: multi-BSS support */
3845         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3846
3847         return send_and_recv_msgs(drv, msg, NULL, NULL);
3848  nla_put_failure:
3849         return -ENOBUFS;
3850 }
3851
3852
3853 /* Set kernel driver on given frequency (MHz) */
3854 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3855 {
3856         struct wpa_driver_nl80211_data *drv = priv;
3857         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3858                                            freq->sec_channel_offset);
3859 }
3860
3861
3862 static int i802_set_rts(void *priv, int rts)
3863 {
3864         struct wpa_driver_nl80211_data *drv = priv;
3865         struct nl_msg *msg;
3866         int ret = -ENOBUFS;
3867         u32 val;
3868
3869         msg = nlmsg_alloc();
3870         if (!msg)
3871                 return -ENOMEM;
3872
3873         if (rts >= 2347)
3874                 val = (u32) -1;
3875         else
3876                 val = rts;
3877
3878         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3879                     0, NL80211_CMD_SET_WIPHY, 0);
3880         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3881         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3882
3883         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3884         if (!ret)
3885                 return 0;
3886 nla_put_failure:
3887         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3888                    "%d (%s)", rts, ret, strerror(-ret));
3889         return ret;
3890 }
3891
3892
3893 static int i802_set_frag(void *priv, int frag)
3894 {
3895         struct wpa_driver_nl80211_data *drv = priv;
3896         struct nl_msg *msg;
3897         int ret = -ENOBUFS;
3898         u32 val;
3899
3900         msg = nlmsg_alloc();
3901         if (!msg)
3902                 return -ENOMEM;
3903
3904         if (frag >= 2346)
3905                 val = (u32) -1;
3906         else
3907                 val = frag;
3908
3909         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3910                     0, NL80211_CMD_SET_WIPHY, 0);
3911         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3912         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3913
3914         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3915         if (!ret)
3916                 return 0;
3917 nla_put_failure:
3918         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3919                    "%d: %d (%s)", frag, ret, strerror(-ret));
3920         return ret;
3921 }
3922
3923
3924 static int i802_flush(void *priv)
3925 {
3926         struct wpa_driver_nl80211_data *drv = priv;
3927         struct nl_msg *msg;
3928
3929         msg = nlmsg_alloc();
3930         if (!msg)
3931                 return -1;
3932
3933         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3934                     0, NL80211_CMD_DEL_STATION, 0);
3935
3936         /*
3937          * XXX: FIX! this needs to flush all VLANs too
3938          */
3939         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3940                     if_nametoindex(drv->ifname));
3941
3942         return send_and_recv_msgs(drv, msg, NULL, NULL);
3943  nla_put_failure:
3944         return -ENOBUFS;
3945 }
3946
3947
3948 static int get_sta_handler(struct nl_msg *msg, void *arg)
3949 {
3950         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3951         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3952         struct hostap_sta_driver_data *data = arg;
3953         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3954         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3955                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3956                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3957                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3958                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3959                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3960         };
3961
3962         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3963                   genlmsg_attrlen(gnlh, 0), NULL);
3964
3965         /*
3966          * TODO: validate the interface and mac address!
3967          * Otherwise, there's a race condition as soon as
3968          * the kernel starts sending station notifications.
3969          */
3970
3971         if (!tb[NL80211_ATTR_STA_INFO]) {
3972                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3973                 return NL_SKIP;
3974         }
3975         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3976                              tb[NL80211_ATTR_STA_INFO],
3977                              stats_policy)) {
3978                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3979                 return NL_SKIP;
3980         }
3981
3982         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3983                 data->inactive_msec =
3984                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3985         if (stats[NL80211_STA_INFO_RX_BYTES])
3986                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3987         if (stats[NL80211_STA_INFO_TX_BYTES])
3988                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3989         if (stats[NL80211_STA_INFO_RX_PACKETS])
3990                 data->rx_packets =
3991                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3992         if (stats[NL80211_STA_INFO_TX_PACKETS])
3993                 data->tx_packets =
3994                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3995
3996         return NL_SKIP;
3997 }
3998
3999 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4000                               const u8 *addr)
4001 {
4002         struct wpa_driver_nl80211_data *drv = priv;
4003         struct nl_msg *msg;
4004
4005         os_memset(data, 0, sizeof(*data));
4006         msg = nlmsg_alloc();
4007         if (!msg)
4008                 return -ENOMEM;
4009
4010         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4011                     0, NL80211_CMD_GET_STATION, 0);
4012
4013         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4014         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4015
4016         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4017  nla_put_failure:
4018         return -ENOBUFS;
4019 }
4020
4021
4022 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4023                                     int cw_min, int cw_max, int burst_time)
4024 {
4025         struct wpa_driver_nl80211_data *drv = priv;
4026         struct nl_msg *msg;
4027         struct nlattr *txq, *params;
4028
4029         msg = nlmsg_alloc();
4030         if (!msg)
4031                 return -1;
4032
4033         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4034                     0, NL80211_CMD_SET_WIPHY, 0);
4035
4036         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4037
4038         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4039         if (!txq)
4040                 goto nla_put_failure;
4041
4042         /* We are only sending parameters for a single TXQ at a time */
4043         params = nla_nest_start(msg, 1);
4044         if (!params)
4045                 goto nla_put_failure;
4046
4047         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4048         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4049          * 32 usec, so need to convert the value here. */
4050         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4051         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4052         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4053         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4054
4055         nla_nest_end(msg, params);
4056
4057         nla_nest_end(msg, txq);
4058
4059         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4060                 return 0;
4061  nla_put_failure:
4062         return -1;
4063 }
4064
4065
4066 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4067 {
4068         struct wpa_driver_nl80211_data *drv = priv;
4069         struct nl_msg *msg;
4070
4071         msg = nlmsg_alloc();
4072         if (!msg)
4073                 return -ENOMEM;
4074
4075         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4076                     NL80211_CMD_SET_BSS, 0);
4077
4078         if (cts >= 0)
4079                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4080         if (preamble >= 0)
4081                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4082         if (slot >= 0)
4083                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4084
4085         /* TODO: multi-BSS support */
4086         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4087
4088         return send_and_recv_msgs(drv, msg, NULL, NULL);
4089  nla_put_failure:
4090         return -ENOBUFS;
4091 }
4092
4093
4094 static int i802_set_cts_protect(void *priv, int value)
4095 {
4096         return i802_set_bss(priv, value, -1, -1);
4097 }
4098
4099
4100 static int i802_set_preamble(void *priv, int value)
4101 {
4102         return i802_set_bss(priv, -1, value, -1);
4103 }
4104
4105
4106 static int i802_set_short_slot_time(void *priv, int value)
4107 {
4108         return i802_set_bss(priv, -1, -1, value);
4109 }
4110
4111
4112 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4113                              const char *ifname, int vlan_id)
4114 {
4115         struct wpa_driver_nl80211_data *drv = priv;
4116         struct nl_msg *msg;
4117
4118         msg = nlmsg_alloc();
4119         if (!msg)
4120                 return -ENOMEM;
4121
4122         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4123                     0, NL80211_CMD_SET_STATION, 0);
4124
4125         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4126                     if_nametoindex(drv->ifname));
4127         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4128         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4129                     if_nametoindex(ifname));
4130
4131         return send_and_recv_msgs(drv, msg, NULL, NULL);
4132  nla_put_failure:
4133         return -ENOBUFS;
4134 }
4135
4136
4137 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4138 {
4139         struct wpa_driver_nl80211_data *drv = priv;
4140         char name[16];
4141
4142         os_snprintf(name, sizeof(name), "%s.sta%d", drv->ifname, aid);
4143         if (val) {
4144                 if (nl80211_create_iface(priv, name, NL80211_IFTYPE_AP_VLAN,
4145                                          NULL, 1) < 0)
4146                         return -1;
4147                 hostapd_set_iface_flags(drv, name, 1);
4148                 return i802_set_sta_vlan(priv, addr, name, 0);
4149         } else {
4150                 i802_set_sta_vlan(priv, addr, drv->ifname, 0);
4151                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4152                                                     name);
4153         }
4154 }
4155
4156
4157 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4158 {
4159         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4160         struct sockaddr_ll lladdr;
4161         unsigned char buf[3000];
4162         int len;
4163         socklen_t fromlen = sizeof(lladdr);
4164
4165         len = recvfrom(sock, buf, sizeof(buf), 0,
4166                        (struct sockaddr *)&lladdr, &fromlen);
4167         if (len < 0) {
4168                 perror("recv");
4169                 return;
4170         }
4171
4172         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4173                 void *ctx;
4174                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4175                 if (!ctx)
4176                         return;
4177                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4178         }
4179 }
4180
4181
4182 static int i802_get_inact_sec(void *priv, const u8 *addr)
4183 {
4184         struct hostap_sta_driver_data data;
4185         int ret;
4186
4187         data.inactive_msec = (unsigned long) -1;
4188         ret = i802_read_sta_data(priv, &data, addr);
4189         if (ret || data.inactive_msec == (unsigned long) -1)
4190                 return -1;
4191         return data.inactive_msec / 1000;
4192 }
4193
4194
4195 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4196 {
4197 #if 0
4198         /* TODO */
4199 #endif
4200         return 0;
4201 }
4202
4203
4204 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4205                            int reason)
4206 {
4207         struct wpa_driver_nl80211_data *drv = priv;
4208         struct ieee80211_mgmt mgmt;
4209
4210         memset(&mgmt, 0, sizeof(mgmt));
4211         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4212                                           WLAN_FC_STYPE_DEAUTH);
4213         memcpy(mgmt.da, addr, ETH_ALEN);
4214         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4215         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4216         mgmt.u.deauth.reason_code = host_to_le16(reason);
4217         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4218                                             IEEE80211_HDRLEN +
4219                                             sizeof(mgmt.u.deauth));
4220 }
4221
4222
4223 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4224                              int reason)
4225 {
4226         struct wpa_driver_nl80211_data *drv = priv;
4227         struct ieee80211_mgmt mgmt;
4228
4229         memset(&mgmt, 0, sizeof(mgmt));
4230         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4231                                           WLAN_FC_STYPE_DISASSOC);
4232         memcpy(mgmt.da, addr, ETH_ALEN);
4233         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4234         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4235         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4236         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4237                                             IEEE80211_HDRLEN +
4238                                             sizeof(mgmt.u.disassoc));
4239 }
4240
4241
4242 static void *i802_init(struct hostapd_data *hapd,
4243                        struct wpa_init_params *params)
4244 {
4245         struct wpa_driver_nl80211_data *drv;
4246         size_t i;
4247
4248         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4249         if (drv == NULL)
4250                 return NULL;
4251
4252         drv->bss.ifindex = drv->ifindex;
4253
4254         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4255         drv->if_indices = drv->default_if_indices;
4256         for (i = 0; i < params->num_bridge; i++) {
4257                 if (params->bridge[i])
4258                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4259         }
4260
4261         /* start listening for EAPOL on the default AP interface */
4262         add_ifidx(drv, drv->ifindex);
4263
4264         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4265                 goto failed;
4266
4267         if (params->bssid) {
4268                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4269                         goto failed;
4270         }
4271
4272         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
4273                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4274                            "into AP mode", drv->ifname);
4275                 goto failed;
4276         }
4277
4278         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4279                 goto failed;
4280
4281         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4282         if (drv->eapol_sock < 0) {
4283                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4284                 goto failed;
4285         }
4286
4287         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4288         {
4289                 printf("Could not register read socket for eapol\n");
4290                 goto failed;
4291         }
4292
4293         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4294                 goto failed;
4295
4296         return drv;
4297
4298 failed:
4299         nl80211_remove_monitor_interface(drv);
4300         if (drv->ioctl_sock >= 0)
4301                 close(drv->ioctl_sock);
4302
4303         genl_family_put(drv->nl80211);
4304         nl_cache_free(drv->nl_cache);
4305         nl_handle_destroy(drv->nl_handle);
4306         nl_cb_put(drv->nl_cb);
4307
4308         os_free(drv);
4309         return NULL;
4310 }
4311
4312
4313 static void i802_deinit(void *priv)
4314 {
4315         wpa_driver_nl80211_deinit(priv);
4316 }
4317
4318 #endif /* HOSTAPD */
4319
4320
4321 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4322         enum wpa_driver_if_type type)
4323 {
4324         switch (type) {
4325         case WPA_IF_STATION:
4326                 return NL80211_IFTYPE_STATION;
4327         case WPA_IF_AP_VLAN:
4328                 return NL80211_IFTYPE_AP_VLAN;
4329         case WPA_IF_AP_BSS:
4330                 return NL80211_IFTYPE_AP;
4331         }
4332         return -1;
4333 }
4334
4335
4336 static int wpa_driver_nl80211_if_add(const char *iface, void *priv,
4337                                      enum wpa_driver_if_type type,
4338                                      const char *ifname, const u8 *addr,
4339                                      void *bss_ctx)
4340 {
4341         struct wpa_driver_nl80211_data *drv = priv;
4342         int ifidx;
4343 #ifdef HOSTAPD
4344         struct i802_bss *bss = NULL;
4345
4346         if (type == WPA_IF_AP_BSS) {
4347                 bss = os_zalloc(sizeof(*bss));
4348                 if (bss == NULL)
4349                         return -1;
4350         }
4351 #endif /* HOSTAPD */
4352
4353         ifidx = nl80211_create_iface(drv, ifname,
4354                                      wpa_driver_nl80211_if_type(type), addr,
4355                                      0);
4356         if (ifidx < 0) {
4357 #ifdef HOSTAPD
4358                 os_free(bss);
4359 #endif /* HOSTAPD */
4360                 return -1;
4361         }
4362
4363 #ifdef HOSTAPD
4364         if (type == WPA_IF_AP_BSS) {
4365                 if (hostapd_set_iface_flags(priv, ifname, 1)) {
4366                         nl80211_remove_iface(priv, ifidx);
4367                         os_free(bss);
4368                         return -1;
4369                 }
4370                 bss->ifindex = ifidx;
4371                 bss->next = drv->bss.next;
4372                 drv->bss.next = bss;
4373         }
4374 #endif /* HOSTAPD */
4375
4376         return 0;
4377 }
4378
4379
4380 static int wpa_driver_nl80211_if_remove(void *priv,
4381                                         enum wpa_driver_if_type type,
4382                                         const char *ifname)
4383 {
4384         struct wpa_driver_nl80211_data *drv = priv;
4385         int ifindex = if_nametoindex(ifname);
4386
4387         nl80211_remove_iface(drv, ifindex);
4388
4389 #ifdef HOSTAPD
4390         if (type == WPA_IF_AP_BSS) {
4391                 struct i802_bss *bss, *prev;
4392                 prev = &drv->bss;
4393                 bss = drv->bss.next;
4394                 while (bss) {
4395                         if (ifindex == bss->ifindex) {
4396                                 prev->next = bss->next;
4397                                 os_free(bss);
4398                                 break;
4399                         }
4400                         prev = bss;
4401                         bss = bss->next;
4402                 }
4403         }
4404 #endif /* HOSTAPD */
4405
4406         return 0;
4407 }
4408
4409
4410 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4411         .name = "nl80211",
4412         .desc = "Linux nl80211/cfg80211",
4413         .get_bssid = wpa_driver_nl80211_get_bssid,
4414         .get_ssid = wpa_driver_nl80211_get_ssid,
4415         .set_key = wpa_driver_nl80211_set_key,
4416         .scan2 = wpa_driver_nl80211_scan,
4417         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4418         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4419         .disassociate = wpa_driver_nl80211_disassociate,
4420         .authenticate = wpa_driver_nl80211_authenticate,
4421         .associate = wpa_driver_nl80211_associate,
4422         .init = wpa_driver_nl80211_init,
4423         .deinit = wpa_driver_nl80211_deinit,
4424         .get_capa = wpa_driver_nl80211_get_capa,
4425         .set_operstate = wpa_driver_nl80211_set_operstate,
4426         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4427         .set_country = wpa_driver_nl80211_set_country,
4428         .set_beacon = wpa_driver_nl80211_set_beacon,
4429         .if_add = wpa_driver_nl80211_if_add,
4430         .if_remove = wpa_driver_nl80211_if_remove,
4431         .send_mlme = wpa_driver_nl80211_send_mlme,
4432         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4433         .sta_add = wpa_driver_nl80211_sta_add,
4434         .sta_remove = wpa_driver_nl80211_sta_remove,
4435         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4436         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4437 #ifdef HOSTAPD
4438         .hapd_init = i802_init,
4439         .hapd_deinit = i802_deinit,
4440         .get_seqnum = i802_get_seqnum,
4441         .flush = i802_flush,
4442         .read_sta_data = i802_read_sta_data,
4443         .sta_deauth = i802_sta_deauth,
4444         .sta_disassoc = i802_sta_disassoc,
4445         .get_inact_sec = i802_get_inact_sec,
4446         .sta_clear_stats = i802_sta_clear_stats,
4447         .set_freq = i802_set_freq,
4448         .set_rts = i802_set_rts,
4449         .set_frag = i802_set_frag,
4450         .set_rate_sets = i802_set_rate_sets,
4451         .set_cts_protect = i802_set_cts_protect,
4452         .set_preamble = i802_set_preamble,
4453         .set_short_slot_time = i802_set_short_slot_time,
4454         .set_tx_queue_params = i802_set_tx_queue_params,
4455         .set_sta_vlan = i802_set_sta_vlan,
4456         .set_wds_sta = i802_set_wds_sta,
4457 #endif /* HOSTAPD */
4458 };