src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if_arp.h>
  22 #include <net/if.h>
  23 #include <netlink/genl/genl.h>
  24 #include <netlink/genl/family.h>
  25 #include <netlink/genl/ctrl.h>
  26 #include <netpacket/packet.h>
  27 #include <linux/filter.h>
  28 #include "nl80211_copy.h"
  29
  30 #include "common.h"
  31 #include "eloop.h"
  32 #include "common/ieee802_11_defs.h"
  33 #include "netlink.h"
  34 #include "radiotap.h"
  35 #include "radiotap_iter.h"
  36 #include "driver.h"
  37
  38 #ifdef CONFIG_LIBNL20
  39 /* libnl 2.0 compatibility code */
  40 #define nl_handle nl_sock
  41 #define nl_handle_alloc_cb nl_socket_alloc_cb
  42 #define nl_handle_destroy nl_socket_free
  43 #endif /* CONFIG_LIBNL20 */
  44
  45
  46 #ifndef IFF_LOWER_UP
  47 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  48 #endif
  49 #ifndef IFF_DORMANT
  50 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  51 #endif
  52
  53 #ifndef IF_OPER_DORMANT
  54 #define IF_OPER_DORMANT 5
  55 #endif
  56 #ifndef IF_OPER_UP
  57 #define IF_OPER_UP 6
  58 #endif
  59
  60 struct i802_bss {
  61         struct i802_bss *next;
  62         int ifindex;
  63         unsigned int beacon_set:1;
  64 };
  65
  66 struct wpa_driver_nl80211_data {
  67         void *ctx;
  68         struct netlink_data *netlink;
  69         int ioctl_sock; /* socket for ioctl() use */
  70         char ifname[IFNAMSIZ + 1];
  71         int ifindex;
  72         int if_removed;
  73         struct wpa_driver_capa capa;
  74         int has_capability;
  75
  76         int operstate;
  77
  78         int scan_complete_events;
  79
  80         struct nl_handle *nl_handle;
  81         struct nl_handle *nl_handle_event;
  82         struct nl_cache *nl_cache;
  83         struct nl_cache *nl_cache_event;
  84         struct nl_cb *nl_cb;
  85         struct genl_family *nl80211;
  86
  87         u8 auth_bssid[ETH_ALEN];
  88         u8 bssid[ETH_ALEN];
  89         int associated;
  90         u8 ssid[32];
  91         size_t ssid_len;
  92         int nlmode;
  93         int ap_scan_as_station;
  94         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 int process_event(struct nl_msg *msg, void *arg)
 711 {
 712         struct wpa_driver_nl80211_data *drv = arg;
 713         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 714         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 715
 716         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 717                   genlmsg_attrlen(gnlh, 0), NULL);
 718
 719         if (tb[NL80211_ATTR_IFINDEX]) {
 720                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 721                 if (ifindex != drv->ifindex) {
 722                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 723                                    " for foreign interface (ifindex %d)",
 724                                    gnlh->cmd, ifindex);
 725                         return NL_SKIP;
 726                 }
 727         }
 728
 729         if (drv->ap_scan_as_station &&
 730             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 731              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 732                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 733                 drv->ap_scan_as_station = 0;
 734         }
 735
 736         switch (gnlh->cmd) {
 737         case NL80211_CMD_TRIGGER_SCAN:
 738                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 739                 break;
 740         case NL80211_CMD_NEW_SCAN_RESULTS:
 741                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 742                 drv->scan_complete_events = 1;
 743                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 744                                      drv->ctx);
 745                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 746                 break;
 747         case NL80211_CMD_SCAN_ABORTED:
 748                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 749                 /*
 750                  * Need to indicate that scan results are available in order
 751                  * not to make wpa_supplicant stop its scanning.
 752                  */
 753                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 754                                      drv->ctx);
 755                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 756                 break;
 757         case NL80211_CMD_AUTHENTICATE:
 758         case NL80211_CMD_ASSOCIATE:
 759         case NL80211_CMD_DEAUTHENTICATE:
 760         case NL80211_CMD_DISASSOCIATE:
 761                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 762                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
 763                 break;
 764         case NL80211_CMD_CONNECT:
 765         case NL80211_CMD_ROAM:
 766                 mlme_event_connect(drv, gnlh->cmd,
 767                                    tb[NL80211_ATTR_STATUS_CODE],
 768                                    tb[NL80211_ATTR_MAC],
 769                                    tb[NL80211_ATTR_REQ_IE],
 770                                    tb[NL80211_ATTR_RESP_IE]);
 771                 break;
 772         case NL80211_CMD_DISCONNECT:
 773                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 774                         /*
 775                          * Avoid reporting two disassociation events that could
 776                          * confuse the core code.
 777                          */
 778                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 779                                    "event when using userspace SME");
 780                         break;
 781                 }
 782                 drv->associated = 0;
 783                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 784                 break;
 785         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 786                 mlme_event_michael_mic_failure(drv, tb);
 787                 break;
 788         case NL80211_CMD_JOIN_IBSS:
 789                 mlme_event_join_ibss(drv, tb);
 790                 break;
 791         default:
 792                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 793                            "(cmd=%d)", gnlh->cmd);
 794                 break;
 795         }
 796
 797         return NL_SKIP;
 798 }
 799
 800
 801 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 802                                              void *sock_ctx)
 803 {
 804         struct nl_cb *cb;
 805         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 806
 807         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 808
 809         cb = nl_cb_clone(drv->nl_cb);
 810         if (!cb)
 811                 return;
 812         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 813         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 814         nl_recvmsgs(drv->nl_handle_event, cb);
 815         nl_cb_put(cb);
 816 }
 817
 818
 819 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 820                                    const char *ifname, int dev_up)
 821 {
 822         struct ifreq ifr;
 823
 824         if (drv->ioctl_sock < 0)
 825                 return -1;
 826
 827         os_memset(&ifr, 0, sizeof(ifr));
 828         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 829
 830         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 831                 perror("ioctl[SIOCGIFFLAGS]");
 832                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 833                            ifname);
 834                 return -1;
 835         }
 836
 837         if (dev_up) {
 838                 if (ifr.ifr_flags & IFF_UP)
 839                         return 0;
 840                 ifr.ifr_flags |= IFF_UP;
 841         } else {
 842                 if (!(ifr.ifr_flags & IFF_UP))
 843                         return 0;
 844                 ifr.ifr_flags &= ~IFF_UP;
 845         }
 846
 847         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 848                 perror("ioctl[SIOCSIFFLAGS]");
 849                 return -1;
 850         }
 851
 852         return 0;
 853 }
 854
 855
 856 /**
 857  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 858  * @priv: driver_nl80211 private data
 859  * @alpha2_arg: country to which to switch to
 860  * Returns: 0 on success, -1 on failure
 861  *
 862  * This asks nl80211 to set the regulatory domain for given
 863  * country ISO / IEC alpha2.
 864  */
 865 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 866 {
 867         struct wpa_driver_nl80211_data *drv = priv;
 868         char alpha2[3];
 869         struct nl_msg *msg;
 870
 871         msg = nlmsg_alloc();
 872         if (!msg)
 873                 return -ENOMEM;
 874
 875         alpha2[0] = alpha2_arg[0];
 876         alpha2[1] = alpha2_arg[1];
 877         alpha2[2] = '\0';
 878
 879         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 880                     0, NL80211_CMD_REQ_SET_REG, 0);
 881
 882         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 883         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 884                 return -EINVAL;
 885         return 0;
 886 nla_put_failure:
 887         return -EINVAL;
 888 }
 889
 890
 891 #ifndef HOSTAPD
 892 struct wiphy_info_data {
 893         int max_scan_ssids;
 894         int ap_supported;
 895         int auth_supported;
 896         int connect_supported;
 897 };
 898
 899
 900 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 901 {
 902         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 903         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 904         struct wiphy_info_data *info = arg;
 905
 906         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 907                   genlmsg_attrlen(gnlh, 0), NULL);
 908
 909         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 910                 info->max_scan_ssids =
 911                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 912
 913         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 914                 struct nlattr *nl_mode;
 915                 int i;
 916                 nla_for_each_nested(nl_mode,
 917                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 918                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 919                                 info->ap_supported = 1;
 920                                 break;
 921                         }
 922                 }
 923         }
 924
 925         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
 926                 struct nlattr *nl_cmd;
 927                 int i;
 928
 929                 nla_for_each_nested(nl_cmd,
 930                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
 931                         u32 cmd = nla_get_u32(nl_cmd);
 932                         if (cmd == NL80211_CMD_AUTHENTICATE)
 933                                 info->auth_supported = 1;
 934                         else if (cmd == NL80211_CMD_CONNECT)
 935                                 info->connect_supported = 1;
 936                 }
 937         }
 938
 939         return NL_SKIP;
 940 }
 941
 942
 943 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 944                                        struct wiphy_info_data *info)
 945 {
 946         struct nl_msg *msg;
 947
 948         os_memset(info, 0, sizeof(*info));
 949         msg = nlmsg_alloc();
 950         if (!msg)
 951                 return -1;
 952
 953         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 954                     0, NL80211_CMD_GET_WIPHY, 0);
 955
 956         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 957
 958         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
 959                 return 0;
 960         msg = NULL;
 961 nla_put_failure:
 962         nlmsg_free(msg);
 963         return -1;
 964 }
 965
 966
 967 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
 968 {
 969         struct wiphy_info_data info;
 970         if (wpa_driver_nl80211_get_info(drv, &info))
 971                 return -1;
 972         drv->has_capability = 1;
 973         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
 974         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
 975                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
 976                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
 977                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
 978         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
 979                 WPA_DRIVER_CAPA_ENC_WEP104 |
 980                 WPA_DRIVER_CAPA_ENC_TKIP |
 981                 WPA_DRIVER_CAPA_ENC_CCMP;
 982         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
 983                 WPA_DRIVER_AUTH_SHARED |
 984                 WPA_DRIVER_AUTH_LEAP;
 985
 986         drv->capa.max_scan_ssids = info.max_scan_ssids;
 987         if (info.ap_supported)
 988                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
 989
 990         if (info.auth_supported)
 991                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
 992         else if (!info.connect_supported) {
 993                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
 994                            "authentication/association or connect commands");
 995                 return -1;
 996         }
 997
 998         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
 999
1000         return 0;
1001 }
1002 #endif /* HOSTAPD */
1003
1004
1005 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1006                                       void *ctx)
1007 {
1008         int ret;
1009
1010         /* Initialize generic netlink and nl80211 */
1011
1012         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1013         if (drv->nl_cb == NULL) {
1014                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1015                            "callbacks");
1016                 goto err1;
1017         }
1018
1019         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1020         if (drv->nl_handle == NULL) {
1021                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1022                            "callbacks");
1023                 goto err2;
1024         }
1025
1026         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1027         if (drv->nl_handle_event == NULL) {
1028                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1029                            "callbacks (event)");
1030                 goto err2b;
1031         }
1032
1033         if (genl_connect(drv->nl_handle)) {
1034                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1035                            "netlink");
1036                 goto err3;
1037         }
1038
1039         if (genl_connect(drv->nl_handle_event)) {
1040                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1041                            "netlink (event)");
1042                 goto err3;
1043         }
1044
1045 #ifdef CONFIG_LIBNL20
1046         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1047                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1048                            "netlink cache");
1049                 goto err3;
1050         }
1051         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1052             0) {
1053                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1054                            "netlink cache (event)");
1055                 goto err3b;
1056         }
1057 #else /* CONFIG_LIBNL20 */
1058         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1059         if (drv->nl_cache == NULL) {
1060                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1061                            "netlink cache");
1062                 goto err3;
1063         }
1064         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1065         if (drv->nl_cache_event == NULL) {
1066                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1067                            "netlink cache (event)");
1068                 goto err3b;
1069         }
1070 #endif /* CONFIG_LIBNL20 */
1071
1072         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1073         if (drv->nl80211 == NULL) {
1074                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1075                            "found");
1076                 goto err4;
1077         }
1078
1079         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1080         if (ret >= 0)
1081                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1082         if (ret < 0) {
1083                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1084                            "membership for scan events: %d (%s)",
1085                            ret, strerror(-ret));
1086                 goto err4;
1087         }
1088
1089         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1090         if (ret >= 0)
1091                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1092         if (ret < 0) {
1093                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1094                            "membership for mlme events: %d (%s)",
1095                            ret, strerror(-ret));
1096                 goto err4;
1097         }
1098
1099         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1100                                  wpa_driver_nl80211_event_receive, drv, ctx);
1101
1102         return 0;
1103
1104 err4:
1105         nl_cache_free(drv->nl_cache_event);
1106 err3b:
1107         nl_cache_free(drv->nl_cache);
1108 err3:
1109         nl_handle_destroy(drv->nl_handle_event);
1110 err2b:
1111         nl_handle_destroy(drv->nl_handle);
1112 err2:
1113         nl_cb_put(drv->nl_cb);
1114 err1:
1115         return -1;
1116 }
1117
1118
1119 /**
1120  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1121  * @ctx: context to be used when calling wpa_supplicant functions,
1122  * e.g., wpa_supplicant_event()
1123  * @ifname: interface name, e.g., wlan0
1124  * Returns: Pointer to private data, %NULL on failure
1125  */
1126 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1127 {
1128         struct wpa_driver_nl80211_data *drv;
1129         struct netlink_config *cfg;
1130
1131         drv = os_zalloc(sizeof(*drv));
1132         if (drv == NULL)
1133                 return NULL;
1134         drv->ctx = ctx;
1135         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1136         drv->monitor_ifidx = -1;
1137         drv->monitor_sock = -1;
1138         drv->ioctl_sock = -1;
1139
1140         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1141                 os_free(drv);
1142                 return NULL;
1143         }
1144
1145         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1146         if (drv->ioctl_sock < 0) {
1147                 perror("socket(PF_INET,SOCK_DGRAM)");
1148                 goto failed;
1149         }
1150
1151         cfg = os_zalloc(sizeof(*cfg));
1152         if (cfg == NULL)
1153                 goto failed;
1154         cfg->ctx = drv;
1155         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1156         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1157         drv->netlink = netlink_init(cfg);
1158         if (drv->netlink == NULL) {
1159                 os_free(cfg);
1160                 goto failed;
1161         }
1162         if (wpa_driver_nl80211_finish_drv_init(drv))
1163                 goto failed;
1164
1165         return drv;
1166
1167 failed:
1168         netlink_deinit(drv->netlink);
1169         if (drv->ioctl_sock >= 0)
1170                 close(drv->ioctl_sock);
1171
1172         genl_family_put(drv->nl80211);
1173         nl_cache_free(drv->nl_cache);
1174         nl_handle_destroy(drv->nl_handle);
1175         nl_cb_put(drv->nl_cb);
1176
1177         os_free(drv);
1178         return NULL;
1179 }
1180
1181
1182 static int
1183 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1184 {
1185         drv->ifindex = if_nametoindex(drv->ifname);
1186
1187 #ifndef HOSTAPD
1188         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1189                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1190                            "use managed mode");
1191         }
1192
1193         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1194                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1195                            "UP", drv->ifname);
1196                 return -1;
1197         }
1198
1199         if (wpa_driver_nl80211_capa(drv))
1200                 return -1;
1201
1202         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1203                                1, IF_OPER_DORMANT);
1204 #endif /* HOSTAPD */
1205
1206         return 0;
1207 }
1208
1209
1210 #ifdef HOSTAPD
1211 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1212 {
1213         struct i802_bss *bss, *prev;
1214         bss = drv->bss.next;
1215         while (bss) {
1216                 prev = bss;
1217                 bss = bss->next;
1218                 os_free(bss);
1219         }
1220 }
1221 #endif /* HOSTAPD */
1222
1223
1224 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1225 {
1226         struct nl_msg *msg;
1227
1228         msg = nlmsg_alloc();
1229         if (!msg)
1230                 return -ENOMEM;
1231
1232         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1233                     0, NL80211_CMD_DEL_BEACON, 0);
1234         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1235
1236         return send_and_recv_msgs(drv, msg, NULL, NULL);
1237  nla_put_failure:
1238         return -ENOBUFS;
1239 }
1240
1241
1242 /**
1243  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1244  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1245  *
1246  * Shut down driver interface and processing of driver events. Free
1247  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1248  */
1249 static void wpa_driver_nl80211_deinit(void *priv)
1250 {
1251         struct wpa_driver_nl80211_data *drv = priv;
1252
1253         nl80211_remove_monitor_interface(drv);
1254         if (drv->monitor_sock >= 0) {
1255                 eloop_unregister_read_sock(drv->monitor_sock);
1256                 close(drv->monitor_sock);
1257         }
1258
1259         if (drv->nlmode == NL80211_IFTYPE_AP)
1260                 wpa_driver_nl80211_del_beacon(drv);
1261
1262 #ifdef HOSTAPD
1263         if (drv->last_freq_ht) {
1264                 /* Clear HT flags from the driver */
1265                 struct hostapd_freq_params freq;
1266                 os_memset(&freq, 0, sizeof(freq));
1267                 freq.freq = drv->last_freq;
1268                 i802_set_freq(priv, &freq);
1269         }
1270
1271         if (drv->eapol_sock >= 0) {
1272                 eloop_unregister_read_sock(drv->eapol_sock);
1273                 close(drv->eapol_sock);
1274         }
1275
1276         if (drv->if_indices != drv->default_if_indices)
1277                 os_free(drv->if_indices);
1278
1279         wpa_driver_nl80211_free_bss(drv);
1280 #endif /* HOSTAPD */
1281
1282         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1283         netlink_deinit(drv->netlink);
1284
1285         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1286
1287         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1288         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1289
1290         if (drv->ioctl_sock >= 0)
1291                 close(drv->ioctl_sock);
1292
1293         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1294         genl_family_put(drv->nl80211);
1295         nl_cache_free(drv->nl_cache);
1296         nl_cache_free(drv->nl_cache_event);
1297         nl_handle_destroy(drv->nl_handle);
1298         nl_handle_destroy(drv->nl_handle_event);
1299         nl_cb_put(drv->nl_cb);
1300
1301         os_free(drv);
1302 }
1303
1304
1305 /**
1306  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1307  * @eloop_ctx: Driver private data
1308  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1309  *
1310  * This function can be used as registered timeout when starting a scan to
1311  * generate a scan completed event if the driver does not report this.
1312  */
1313 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1314 {
1315         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1316         if (drv->ap_scan_as_station) {
1317                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1318                 drv->ap_scan_as_station = 0;
1319         }
1320         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1321         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1322 }
1323
1324
1325 /**
1326  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1327  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1328  * @params: Scan parameters
1329  * Returns: 0 on success, -1 on failure
1330  */
1331 static int wpa_driver_nl80211_scan(void *priv,
1332                                    struct wpa_driver_scan_params *params)
1333 {
1334         struct wpa_driver_nl80211_data *drv = priv;
1335         int ret = 0, timeout;
1336         struct nl_msg *msg, *ssids, *freqs;
1337         size_t i;
1338
1339         msg = nlmsg_alloc();
1340         ssids = nlmsg_alloc();
1341         freqs = nlmsg_alloc();
1342         if (!msg || !ssids || !freqs) {
1343                 nlmsg_free(msg);
1344                 nlmsg_free(ssids);
1345                 nlmsg_free(freqs);
1346                 return -1;
1347         }
1348
1349         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1350                     NL80211_CMD_TRIGGER_SCAN, 0);
1351
1352         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1353
1354         for (i = 0; i < params->num_ssids; i++) {
1355                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1356                         params->ssids[i].ssid);
1357         }
1358         if (params->num_ssids)
1359                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1360
1361         if (params->extra_ies) {
1362                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1363                         params->extra_ies);
1364         }
1365
1366         if (params->freqs) {
1367                 for (i = 0; params->freqs[i]; i++)
1368                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1369                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1370         }
1371
1372         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1373         msg = NULL;
1374         if (ret) {
1375                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1376                            "(%s)", ret, strerror(-ret));
1377 #ifdef HOSTAPD
1378                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1379                         /*
1380                          * mac80211 does not allow scan requests in AP mode, so
1381                          * try to do this in station mode.
1382                          */
1383                         if (wpa_driver_nl80211_set_mode(drv,
1384                                                         IEEE80211_MODE_INFRA))
1385                                 goto nla_put_failure;
1386
1387                         if (wpa_driver_nl80211_scan(drv, params)) {
1388                                 wpa_driver_nl80211_set_mode(drv,
1389                                                             IEEE80211_MODE_AP);
1390                                 goto nla_put_failure;
1391                         }
1392
1393                         /* Restore AP mode when processing scan results */
1394                         drv->ap_scan_as_station = 1;
1395                         ret = 0;
1396                 } else
1397                         goto nla_put_failure;
1398 #else /* HOSTAPD */
1399                 goto nla_put_failure;
1400 #endif /* HOSTAPD */
1401         }
1402
1403         /* Not all drivers generate "scan completed" wireless event, so try to
1404          * read results after a timeout. */
1405         timeout = 10;
1406         if (drv->scan_complete_events) {
1407                 /*
1408                  * The driver seems to deliver events to notify when scan is
1409                  * complete, so use longer timeout to avoid race conditions
1410                  * with scanning and following association request.
1411                  */
1412                 timeout = 30;
1413         }
1414         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1415                    "seconds", ret, timeout);
1416         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1417         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1418                                drv, drv->ctx);
1419
1420 nla_put_failure:
1421         nlmsg_free(ssids);
1422         nlmsg_free(msg);
1423         nlmsg_free(freqs);
1424         return ret;
1425 }
1426
1427
1428 static int bss_info_handler(struct nl_msg *msg, void *arg)
1429 {
1430         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1431         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1432         struct nlattr *bss[NL80211_BSS_MAX + 1];
1433         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1434                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1435                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1436                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1437                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1438                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1439                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1440                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1441                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1442                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1443                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1444         };
1445         struct wpa_scan_results *res = arg;
1446         struct wpa_scan_res **tmp;
1447         struct wpa_scan_res *r;
1448         const u8 *ie;
1449         size_t ie_len;
1450
1451         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1452                   genlmsg_attrlen(gnlh, 0), NULL);
1453         if (!tb[NL80211_ATTR_BSS])
1454                 return NL_SKIP;
1455         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1456                              bss_policy))
1457                 return NL_SKIP;
1458         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1459                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1460                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1461         } else {
1462                 ie = NULL;
1463                 ie_len = 0;
1464         }
1465
1466         r = os_zalloc(sizeof(*r) + ie_len);
1467         if (r == NULL)
1468                 return NL_SKIP;
1469         if (bss[NL80211_BSS_BSSID])
1470                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1471                           ETH_ALEN);
1472         if (bss[NL80211_BSS_FREQUENCY])
1473                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1474         if (bss[NL80211_BSS_BEACON_INTERVAL])
1475                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1476         if (bss[NL80211_BSS_CAPABILITY])
1477                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1478         r->flags |= WPA_SCAN_NOISE_INVALID;
1479         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1480                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1481                 r->level /= 100; /* mBm to dBm */
1482                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1483         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1484                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1485                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1486         } else
1487                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1488         if (bss[NL80211_BSS_TSF])
1489                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1490         if (bss[NL80211_BSS_SEEN_MS_AGO])
1491                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1492         r->ie_len = ie_len;
1493         if (ie)
1494                 os_memcpy(r + 1, ie, ie_len);
1495
1496         if (bss[NL80211_BSS_STATUS]) {
1497                 enum nl80211_bss_status status;
1498                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1499                 switch (status) {
1500                 case NL80211_BSS_STATUS_AUTHENTICATED:
1501                         r->flags |= WPA_SCAN_AUTHENTICATED;
1502                         break;
1503                 case NL80211_BSS_STATUS_ASSOCIATED:
1504                         r->flags |= WPA_SCAN_ASSOCIATED;
1505                         break;
1506                 default:
1507                         break;
1508                 }
1509         }
1510
1511         tmp = os_realloc(res->res,
1512                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1513         if (tmp == NULL) {
1514                 os_free(r);
1515                 return NL_SKIP;
1516         }
1517         tmp[res->num++] = r;
1518         res->res = tmp;
1519
1520         return NL_SKIP;
1521 }
1522
1523
1524 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1525                                  const u8 *addr)
1526 {
1527         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1528                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1529                            "mismatch");
1530                 wpa_driver_nl80211_mlme(drv, addr,
1531                                         NL80211_CMD_DEAUTHENTICATE,
1532                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1533         }
1534 }
1535
1536
1537 static void wpa_driver_nl80211_check_bss_status(
1538         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1539 {
1540         size_t i;
1541
1542         for (i = 0; i < res->num; i++) {
1543                 struct wpa_scan_res *r = res->res[i];
1544                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1545                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1546                                    "indicates BSS status with " MACSTR
1547                                    " as authenticated",
1548                                    MAC2STR(r->bssid));
1549                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1550                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1551                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1552                             0) {
1553                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1554                                            " in local state (auth=" MACSTR
1555                                            " assoc=" MACSTR ")",
1556                                            MAC2STR(drv->auth_bssid),
1557                                            MAC2STR(drv->bssid));
1558                         }
1559                 }
1560
1561                 if (r->flags & WPA_SCAN_ASSOCIATED) {
1562                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1563                                    "indicate BSS status with " MACSTR
1564                                    " as associated",
1565                                    MAC2STR(r->bssid));
1566                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1567                             !drv->associated) {
1568                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1569                                            "(not associated) does not match "
1570                                            "with BSS state");
1571                                 clear_state_mismatch(drv, r->bssid);
1572                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1573                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1574                                    0) {
1575                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1576                                            "(associated with " MACSTR ") does "
1577                                            "not match with BSS state",
1578                                            MAC2STR(drv->bssid));
1579                                 clear_state_mismatch(drv, r->bssid);
1580                                 clear_state_mismatch(drv, drv->bssid);
1581                         }
1582                 }
1583         }
1584 }
1585
1586
1587 /**
1588  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1589  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1590  * Returns: Scan results on success, -1 on failure
1591  */
1592 static struct wpa_scan_results *
1593 wpa_driver_nl80211_get_scan_results(void *priv)
1594 {
1595         struct wpa_driver_nl80211_data *drv = priv;
1596         struct nl_msg *msg;
1597         struct wpa_scan_results *res;
1598         int ret;
1599
1600         res = os_zalloc(sizeof(*res));
1601         if (res == NULL)
1602                 return NULL;
1603         msg = nlmsg_alloc();
1604         if (!msg)
1605                 goto nla_put_failure;
1606
1607         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1608                     NL80211_CMD_GET_SCAN, 0);
1609         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1610
1611         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1612         msg = NULL;
1613         if (ret == 0) {
1614                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1615                            (unsigned long) res->num);
1616                 wpa_driver_nl80211_check_bss_status(drv, res);
1617                 return res;
1618         }
1619         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1620                    "(%s)", ret, strerror(-ret));
1621 nla_put_failure:
1622         nlmsg_free(msg);
1623         wpa_scan_results_free(res);
1624         return NULL;
1625 }
1626
1627
1628 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1629                                       enum wpa_alg alg, const u8 *addr,
1630                                       int key_idx, int set_tx,
1631                                       const u8 *seq, size_t seq_len,
1632                                       const u8 *key, size_t key_len)
1633 {
1634         struct wpa_driver_nl80211_data *drv = priv;
1635         int ifindex = if_nametoindex(ifname);
1636         struct nl_msg *msg;
1637         int ret;
1638
1639         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1640                    "set_tx=%d seq_len=%lu key_len=%lu",
1641                    __func__, ifindex, alg, addr, key_idx, set_tx,
1642                    (unsigned long) seq_len, (unsigned long) key_len);
1643
1644         msg = nlmsg_alloc();
1645         if (!msg)
1646                 return -ENOMEM;
1647
1648         if (alg == WPA_ALG_NONE) {
1649                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1650                             0, NL80211_CMD_DEL_KEY, 0);
1651         } else {
1652                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1653                             0, NL80211_CMD_NEW_KEY, 0);
1654                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1655                 switch (alg) {
1656                 case WPA_ALG_WEP:
1657                         if (key_len == 5)
1658                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1659                                             WLAN_CIPHER_SUITE_WEP40);
1660                         else
1661                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1662                                             WLAN_CIPHER_SUITE_WEP104);
1663                         break;
1664                 case WPA_ALG_TKIP:
1665                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1666                                     WLAN_CIPHER_SUITE_TKIP);
1667                         break;
1668                 case WPA_ALG_CCMP:
1669                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1670                                     WLAN_CIPHER_SUITE_CCMP);
1671                         break;
1672                 case WPA_ALG_IGTK:
1673                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1674                                     WLAN_CIPHER_SUITE_AES_CMAC);
1675                         break;
1676                 default:
1677                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1678                                    "algorithm %d", __func__, alg);
1679                         nlmsg_free(msg);
1680                         return -1;
1681                 }
1682         }
1683
1684         if (seq && seq_len)
1685                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1686
1687         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1688         {
1689                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1690                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1691         }
1692         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1693         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1694
1695         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1696         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1697                 ret = 0;
1698         if (ret)
1699                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1700                            ret, strerror(-ret));
1701
1702         /*
1703          * If we failed or don't need to set the default TX key (below),
1704          * we're done here.
1705          */
1706         if (ret || !set_tx || alg == WPA_ALG_NONE)
1707                 return ret;
1708 #ifdef HOSTAPD /* FIX: is this needed? */
1709         if (addr)
1710                 return ret;
1711 #endif /* HOSTAPD */
1712
1713         msg = nlmsg_alloc();
1714         if (!msg)
1715                 return -ENOMEM;
1716
1717         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1718                     0, NL80211_CMD_SET_KEY, 0);
1719         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1720         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1721         if (alg == WPA_ALG_IGTK)
1722                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1723         else
1724                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1725
1726         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1727         if (ret == -ENOENT)
1728                 ret = 0;
1729         if (ret)
1730                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1731                            "err=%d %s)", ret, strerror(-ret));
1732         return ret;
1733
1734 nla_put_failure:
1735         return -ENOBUFS;
1736 }
1737
1738
1739 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
1740                       int key_idx, int defkey,
1741                       const u8 *seq, size_t seq_len,
1742                       const u8 *key, size_t key_len)
1743 {
1744         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1745         if (!key_attr)
1746                 return -1;
1747
1748         if (defkey && alg == WPA_ALG_IGTK)
1749                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1750         else if (defkey)
1751                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1752
1753         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1754
1755         switch (alg) {
1756         case WPA_ALG_WEP:
1757                 if (key_len == 5)
1758                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1759                                     WLAN_CIPHER_SUITE_WEP40);
1760                 else
1761                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1762                                     WLAN_CIPHER_SUITE_WEP104);
1763                 break;
1764         case WPA_ALG_TKIP:
1765                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1766                 break;
1767         case WPA_ALG_CCMP:
1768                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1769                 break;
1770         case WPA_ALG_IGTK:
1771                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1772                             WLAN_CIPHER_SUITE_AES_CMAC);
1773                 break;
1774         default:
1775                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1776                            "algorithm %d", __func__, alg);
1777                 return -1;
1778         }
1779
1780         if (seq && seq_len)
1781                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1782
1783         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1784
1785         nla_nest_end(msg, key_attr);
1786
1787         return 0;
1788  nla_put_failure:
1789         return -1;
1790 }
1791
1792
1793 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1794                                  struct nl_msg *msg)
1795 {
1796         int i, privacy = 0;
1797         struct nlattr *nl_keys, *nl_key;
1798
1799         for (i = 0; i < 4; i++) {
1800                 if (!params->wep_key[i])
1801                         continue;
1802                 privacy = 1;
1803                 break;
1804         }
1805         if (!privacy)
1806                 return 0;
1807
1808         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1809
1810         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1811         if (!nl_keys)
1812                 goto nla_put_failure;
1813
1814         for (i = 0; i < 4; i++) {
1815                 if (!params->wep_key[i])
1816                         continue;
1817
1818                 nl_key = nla_nest_start(msg, i);
1819                 if (!nl_key)
1820                         goto nla_put_failure;
1821
1822                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1823                         params->wep_key[i]);
1824                 if (params->wep_key_len[i] == 5)
1825                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1826                                     WLAN_CIPHER_SUITE_WEP40);
1827                 else
1828                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1829                                     WLAN_CIPHER_SUITE_WEP104);
1830
1831                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1832
1833                 if (i == params->wep_tx_keyidx)
1834                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1835
1836                 nla_nest_end(msg, nl_key);
1837         }
1838         nla_nest_end(msg, nl_keys);
1839
1840         return 0;
1841
1842 nla_put_failure:
1843         return -ENOBUFS;
1844 }
1845
1846
1847 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1848                                    const u8 *addr, int cmd, u16 reason_code)
1849 {
1850         int ret = -1;
1851         struct nl_msg *msg;
1852
1853         msg = nlmsg_alloc();
1854         if (!msg)
1855                 return -1;
1856
1857         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1858
1859         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1860         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1861         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1862
1863         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1864         msg = NULL;
1865         if (ret) {
1866                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1867                            "(%s)", ret, strerror(-ret));
1868                 goto nla_put_failure;
1869         }
1870         ret = 0;
1871
1872 nla_put_failure:
1873         nlmsg_free(msg);
1874         return ret;
1875 }
1876
1877
1878 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
1879                                          const u8 *addr, int reason_code)
1880 {
1881         wpa_printf(MSG_DEBUG, "%s", __func__);
1882         drv->associated = 0;
1883         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
1884                                        reason_code);
1885 }
1886
1887
1888 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1889                                              int reason_code)
1890 {
1891         struct wpa_driver_nl80211_data *drv = priv;
1892         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1893                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1894         wpa_printf(MSG_DEBUG, "%s", __func__);
1895         drv->associated = 0;
1896         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1897                                        reason_code);
1898 }
1899
1900
1901 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1902                                            int reason_code)
1903 {
1904         struct wpa_driver_nl80211_data *drv = priv;
1905         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1906                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1907         wpa_printf(MSG_DEBUG, "%s", __func__);
1908         drv->associated = 0;
1909         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1910                                        reason_code);
1911 }
1912
1913
1914 static int wpa_driver_nl80211_authenticate(
1915         void *priv, struct wpa_driver_auth_params *params)
1916 {
1917         struct wpa_driver_nl80211_data *drv = priv;
1918         int ret = -1, i;
1919         struct nl_msg *msg;
1920         enum nl80211_auth_type type;
1921         int count = 0;
1922
1923         drv->associated = 0;
1924         os_memset(drv->auth_bssid, 0, ETH_ALEN);
1925
1926         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
1927                 return -1;
1928
1929 retry:
1930         msg = nlmsg_alloc();
1931         if (!msg)
1932                 return -1;
1933
1934         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1935                    drv->ifindex);
1936
1937         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1938                     NL80211_CMD_AUTHENTICATE, 0);
1939
1940         for (i = 0; i < 4; i++) {
1941                 if (!params->wep_key[i])
1942                         continue;
1943                 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
1944                                            i,
1945                                            i == params->wep_tx_keyidx, NULL, 0,
1946                                            params->wep_key[i],
1947                                            params->wep_key_len[i]);
1948                 if (params->wep_tx_keyidx != i)
1949                         continue;
1950                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
1951                                params->wep_key[i], params->wep_key_len[i])) {
1952                         nlmsg_free(msg);
1953                         return -1;
1954                 }
1955         }
1956
1957         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1958         if (params->bssid) {
1959                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1960                            MAC2STR(params->bssid));
1961                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1962         }
1963         if (params->freq) {
1964                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1965                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1966         }
1967         if (params->ssid) {
1968                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1969                                   params->ssid, params->ssid_len);
1970                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1971                         params->ssid);
1972         }
1973         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1974         if (params->ie)
1975                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1976         /*
1977          * TODO: if multiple auth_alg options enabled, try them one by one if
1978          * the AP rejects authentication due to unknown auth alg
1979          */
1980         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1981                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1982         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1983                 type = NL80211_AUTHTYPE_SHARED_KEY;
1984         else if (params->auth_alg & AUTH_ALG_LEAP)
1985                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1986         else if (params->auth_alg & AUTH_ALG_FT)
1987                 type = NL80211_AUTHTYPE_FT;
1988         else
1989                 goto nla_put_failure;
1990         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1991         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1992
1993         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1994         msg = NULL;
1995         if (ret) {
1996                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1997                            "(%s)", ret, strerror(-ret));
1998                 count++;
1999                 if (ret == -EALREADY && count == 1 && params->bssid) {
2000                         /*
2001                          * mac80211 does not currently accept new
2002                          * authentication if we are already authenticated. As a
2003                          * workaround, force deauthentication and try again.
2004                          */
2005                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2006                                    "after forced deauthentication");
2007                         wpa_driver_nl80211_deauthenticate(
2008                                 drv, params->bssid,
2009                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2010                         nlmsg_free(msg);
2011                         goto retry;
2012                 }
2013                 goto nla_put_failure;
2014         }
2015         ret = 0;
2016         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2017                    "successfully");
2018
2019 nla_put_failure:
2020         nlmsg_free(msg);
2021         return ret;
2022 }
2023
2024
2025 struct phy_info_arg {
2026         u16 *num_modes;
2027         struct hostapd_hw_modes *modes;
2028 };
2029
2030 static int phy_info_handler(struct nl_msg *msg, void *arg)
2031 {
2032         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2033         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2034         struct phy_info_arg *phy_info = arg;
2035
2036         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2037
2038         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2039         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2040                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2041                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2042                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2043                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2044                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2045                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2046         };
2047
2048         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2049         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2050                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2051                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2052         };
2053
2054         struct nlattr *nl_band;
2055         struct nlattr *nl_freq;
2056         struct nlattr *nl_rate;
2057         int rem_band, rem_freq, rem_rate;
2058         struct hostapd_hw_modes *mode;
2059         int idx, mode_is_set;
2060
2061         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2062                   genlmsg_attrlen(gnlh, 0), NULL);
2063
2064         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2065                 return NL_SKIP;
2066
2067         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2068                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2069                 if (!mode)
2070                         return NL_SKIP;
2071                 phy_info->modes = mode;
2072
2073                 mode_is_set = 0;
2074
2075                 mode = &phy_info->modes[*(phy_info->num_modes)];
2076                 memset(mode, 0, sizeof(*mode));
2077                 *(phy_info->num_modes) += 1;
2078
2079                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2080                           nla_len(nl_band), NULL);
2081
2082                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2083                         mode->ht_capab = nla_get_u16(
2084                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2085                 }
2086
2087                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2088                         mode->a_mpdu_params |= nla_get_u8(
2089                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2090                                 0x03;
2091                 }
2092
2093                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2094                         mode->a_mpdu_params |= nla_get_u8(
2095                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2096                                 2;
2097                 }
2098
2099                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2100                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2101                         u8 *mcs;
2102                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2103                         os_memcpy(mode->mcs_set, mcs, 16);
2104                 }
2105
2106                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2107                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2108                                   nla_len(nl_freq), freq_policy);
2109                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2110                                 continue;
2111                         mode->num_channels++;
2112                 }
2113
2114                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2115                 if (!mode->channels)
2116                         return NL_SKIP;
2117
2118                 idx = 0;
2119
2120                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2121                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2122                                   nla_len(nl_freq), freq_policy);
2123                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2124                                 continue;
2125
2126                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2127                         mode->channels[idx].flag = 0;
2128
2129                         if (!mode_is_set) {
2130                                 /* crude heuristic */
2131                                 if (mode->channels[idx].freq < 4000)
2132                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2133                                 else
2134                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2135                                 mode_is_set = 1;
2136                         }
2137
2138                         /* crude heuristic */
2139                         if (mode->channels[idx].freq < 4000)
2140                                 if (mode->channels[idx].freq == 2484)
2141                                         mode->channels[idx].chan = 14;
2142                                 else
2143                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2144                         else
2145                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2146
2147                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2148                                 mode->channels[idx].flag |=
2149                                         HOSTAPD_CHAN_DISABLED;
2150                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2151                                 mode->channels[idx].flag |=
2152                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2153                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2154                                 mode->channels[idx].flag |=
2155                                         HOSTAPD_CHAN_NO_IBSS;
2156                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2157                                 mode->channels[idx].flag |=
2158                                         HOSTAPD_CHAN_RADAR;
2159
2160                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2161                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2162                                 mode->channels[idx].max_tx_power =
2163                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2164
2165                         idx++;
2166                 }
2167
2168                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2169                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2170                                   nla_len(nl_rate), rate_policy);
2171                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2172                                 continue;
2173                         mode->num_rates++;
2174                 }
2175
2176                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2177                 if (!mode->rates)
2178                         return NL_SKIP;
2179
2180                 idx = 0;
2181
2182                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2183                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2184                                   nla_len(nl_rate), rate_policy);
2185                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2186                                 continue;
2187                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2188
2189                         /* crude heuristic */
2190                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2191                             mode->rates[idx] > 200)
2192                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2193
2194                         idx++;
2195                 }
2196         }
2197
2198         return NL_SKIP;
2199 }
2200
2201 static struct hostapd_hw_modes *
2202 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2203 {
2204         u16 m;
2205         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2206         int i, mode11g_idx = -1;
2207
2208         /* If only 802.11g mode is included, use it to construct matching
2209          * 802.11b mode data. */
2210
2211         for (m = 0; m < *num_modes; m++) {
2212                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2213                         return modes; /* 802.11b already included */
2214                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2215                         mode11g_idx = m;
2216         }
2217
2218         if (mode11g_idx < 0)
2219                 return modes; /* 2.4 GHz band not supported at all */
2220
2221         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2222         if (nmodes == NULL)
2223                 return modes; /* Could not add 802.11b mode */
2224
2225         mode = &nmodes[*num_modes];
2226         os_memset(mode, 0, sizeof(*mode));
2227         (*num_modes)++;
2228         modes = nmodes;
2229
2230         mode->mode = HOSTAPD_MODE_IEEE80211B;
2231
2232         mode11g = &modes[mode11g_idx];
2233         mode->num_channels = mode11g->num_channels;
2234         mode->channels = os_malloc(mode11g->num_channels *
2235                                    sizeof(struct hostapd_channel_data));
2236         if (mode->channels == NULL) {
2237                 (*num_modes)--;
2238                 return modes; /* Could not add 802.11b mode */
2239         }
2240         os_memcpy(mode->channels, mode11g->channels,
2241                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2242
2243         mode->num_rates = 0;
2244         mode->rates = os_malloc(4 * sizeof(int));
2245         if (mode->rates == NULL) {
2246                 os_free(mode->channels);
2247                 (*num_modes)--;
2248                 return modes; /* Could not add 802.11b mode */
2249         }
2250
2251         for (i = 0; i < mode11g->num_rates; i++) {
2252                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2253                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2254                         continue;
2255                 mode->rates[mode->num_rates] = mode11g->rates[i];
2256                 mode->num_rates++;
2257                 if (mode->num_rates == 4)
2258                         break;
2259         }
2260
2261         if (mode->num_rates == 0) {
2262                 os_free(mode->channels);
2263                 os_free(mode->rates);
2264                 (*num_modes)--;
2265                 return modes; /* No 802.11b rates */
2266         }
2267
2268         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2269                    "information");
2270
2271         return modes;
2272 }
2273
2274
2275 static struct hostapd_hw_modes *
2276 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2277 {
2278         struct wpa_driver_nl80211_data *drv = priv;
2279         struct nl_msg *msg;
2280         struct phy_info_arg result = {
2281                 .num_modes = num_modes,
2282                 .modes = NULL,
2283         };
2284
2285         *num_modes = 0;
2286         *flags = 0;
2287
2288         msg = nlmsg_alloc();
2289         if (!msg)
2290                 return NULL;
2291
2292         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2293                     0, NL80211_CMD_GET_WIPHY, 0);
2294
2295         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2296
2297         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2298                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2299  nla_put_failure:
2300         return NULL;
2301 }
2302
2303
2304 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2305                                          const void *data, size_t len,
2306                                          int encrypt)
2307 {
2308         __u8 rtap_hdr[] = {
2309                 0x00, 0x00, /* radiotap version */
2310                 0x0e, 0x00, /* radiotap length */
2311                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2312                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2313                 0x00,       /* padding */
2314                 0x00, 0x00, /* RX and TX flags to indicate that */
2315                 0x00, 0x00, /* this is the injected frame directly */
2316         };
2317         struct iovec iov[2] = {
2318                 {
2319                         .iov_base = &rtap_hdr,
2320                         .iov_len = sizeof(rtap_hdr),
2321                 },
2322                 {
2323                         .iov_base = (void *) data,
2324                         .iov_len = len,
2325                 }
2326         };
2327         struct msghdr msg = {
2328                 .msg_name = NULL,
2329                 .msg_namelen = 0,
2330                 .msg_iov = iov,
2331                 .msg_iovlen = 2,
2332                 .msg_control = NULL,
2333                 .msg_controllen = 0,
2334                 .msg_flags = 0,
2335         };
2336
2337         if (encrypt)
2338                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2339
2340         return sendmsg(drv->monitor_sock, &msg, 0);
2341 }
2342
2343
2344 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2345                                         size_t data_len)
2346 {
2347         struct wpa_driver_nl80211_data *drv = priv;
2348         struct ieee80211_mgmt *mgmt;
2349         int encrypt = 1;
2350         u16 fc;
2351
2352         mgmt = (struct ieee80211_mgmt *) data;
2353         fc = le_to_host16(mgmt->frame_control);
2354
2355         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2356             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2357                 /*
2358                  * Only one of the authentication frame types is encrypted.
2359                  * In order for static WEP encryption to work properly (i.e.,
2360                  * to not encrypt the frame), we need to tell mac80211 about
2361                  * the frames that must not be encrypted.
2362                  */
2363                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2364                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2365                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2366                         encrypt = 0;
2367         }
2368
2369         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2370 }
2371
2372
2373 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2374                                          const u8 *head, size_t head_len,
2375                                          const u8 *tail, size_t tail_len,
2376                                          int dtim_period, int beacon_int)
2377 {
2378         struct wpa_driver_nl80211_data *drv = priv;
2379         struct nl_msg *msg;
2380         u8 cmd = NL80211_CMD_NEW_BEACON;
2381         int ret;
2382         int beacon_set;
2383         int ifindex = if_nametoindex(ifname);
2384 #ifdef HOSTAPD
2385         struct i802_bss *bss;
2386
2387         bss = get_bss(drv, ifindex);
2388         if (bss == NULL)
2389                 return -ENOENT;
2390         beacon_set = bss->beacon_set;
2391 #else /* HOSTAPD */
2392         beacon_set = drv->beacon_set;
2393 #endif /* HOSTAPD */
2394
2395         msg = nlmsg_alloc();
2396         if (!msg)
2397                 return -ENOMEM;
2398
2399         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2400                    beacon_set);
2401         if (beacon_set)
2402                 cmd = NL80211_CMD_SET_BEACON;
2403
2404         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2405                     0, cmd, 0);
2406         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2407         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2408         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2409         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2410         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2411
2412         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2413         if (ret) {
2414                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2415                            ret, strerror(-ret));
2416         } else {
2417 #ifdef HOSTAPD
2418                 bss->beacon_set = 1;
2419 #else /* HOSTAPD */
2420                 drv->beacon_set = 1;
2421 #endif /* HOSTAPD */
2422         }
2423         return ret;
2424  nla_put_failure:
2425         return -ENOBUFS;
2426 }
2427
2428
2429 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2430                                        int freq, int ht_enabled,
2431                                        int sec_channel_offset)
2432 {
2433         struct nl_msg *msg;
2434         int ret;
2435
2436         msg = nlmsg_alloc();
2437         if (!msg)
2438                 return -1;
2439
2440         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2441                     NL80211_CMD_SET_WIPHY, 0);
2442
2443         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2444         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2445         if (ht_enabled) {
2446                 switch (sec_channel_offset) {
2447                 case -1:
2448                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2449                                     NL80211_CHAN_HT40MINUS);
2450                         break;
2451                 case 1:
2452                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2453                                     NL80211_CHAN_HT40PLUS);
2454                         break;
2455                 default:
2456                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2457                                     NL80211_CHAN_HT20);
2458                         break;
2459                 }
2460         }
2461
2462         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2463         if (ret == 0)
2464                 return 0;
2465         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2466                    "%d (%s)", freq, ret, strerror(-ret));
2467 nla_put_failure:
2468         return -1;
2469 }
2470
2471
2472 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2473                                       struct hostapd_sta_add_params *params)
2474 {
2475         struct wpa_driver_nl80211_data *drv = priv;
2476         struct nl_msg *msg;
2477         int ret = -ENOBUFS;
2478
2479         msg = nlmsg_alloc();
2480         if (!msg)
2481                 return -ENOMEM;
2482
2483         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2484                     0, NL80211_CMD_NEW_STATION, 0);
2485
2486         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2487         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2488         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2489         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2490                 params->supp_rates);
2491         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2492                     params->listen_interval);
2493         if (params->ht_capabilities) {
2494                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2495                         sizeof(*params->ht_capabilities),
2496                         params->ht_capabilities);
2497         }
2498
2499         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2500         if (ret)
2501                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2502                            "result: %d (%s)", ret, strerror(-ret));
2503         if (ret == -EEXIST)
2504                 ret = 0;
2505  nla_put_failure:
2506         return ret;
2507 }
2508
2509
2510 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2511 {
2512         struct wpa_driver_nl80211_data *drv = priv;
2513         struct nl_msg *msg;
2514         int ret;
2515
2516         msg = nlmsg_alloc();
2517         if (!msg)
2518                 return -ENOMEM;
2519
2520         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2521                     0, NL80211_CMD_DEL_STATION, 0);
2522
2523         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2524                     if_nametoindex(drv->ifname));
2525         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2526
2527         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2528         if (ret == -ENOENT)
2529                 return 0;
2530         return ret;
2531  nla_put_failure:
2532         return -ENOBUFS;
2533 }
2534
2535
2536 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2537                                  int ifidx)
2538 {
2539         struct nl_msg *msg;
2540
2541         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
2542
2543 #ifdef HOSTAPD
2544         /* stop listening for EAPOL on this interface */
2545         del_ifidx(drv, ifidx);
2546 #endif /* HOSTAPD */
2547
2548         msg = nlmsg_alloc();
2549         if (!msg)
2550                 goto nla_put_failure;
2551
2552         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2553                     0, NL80211_CMD_DEL_INTERFACE, 0);
2554         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2555
2556         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2557                 return;
2558  nla_put_failure:
2559         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2560                    ifidx);
2561 }
2562
2563
2564 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2565                                      const char *ifname,
2566                                      enum nl80211_iftype iftype,
2567                                      const u8 *addr, int wds)
2568 {
2569         struct nl_msg *msg, *flags = NULL;
2570         int ifidx;
2571         int ret = -ENOBUFS;
2572
2573         msg = nlmsg_alloc();
2574         if (!msg)
2575                 return -1;
2576
2577         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2578                     0, NL80211_CMD_NEW_INTERFACE, 0);
2579         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2580         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2581         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2582
2583         if (iftype == NL80211_IFTYPE_MONITOR) {
2584                 int err;
2585
2586                 flags = nlmsg_alloc();
2587                 if (!flags)
2588                         goto nla_put_failure;
2589
2590                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2591
2592                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2593
2594                 nlmsg_free(flags);
2595
2596                 if (err)
2597                         goto nla_put_failure;
2598         } else if (wds) {
2599                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
2600         }
2601
2602         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2603         if (ret) {
2604  nla_put_failure:
2605                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2606                            ifname, ret, strerror(-ret));
2607                 return ret;
2608         }
2609
2610         ifidx = if_nametoindex(ifname);
2611         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
2612                    ifname, ifidx);
2613
2614         if (ifidx <= 0)
2615                 return -1;
2616
2617 #ifdef HOSTAPD
2618         /* start listening for EAPOL on this interface */
2619         add_ifidx(drv, ifidx);
2620
2621         if (addr && iftype == NL80211_IFTYPE_AP &&
2622             set_ifhwaddr(drv, ifname, addr)) {
2623                 nl80211_remove_iface(drv, ifidx);
2624                 return -1;
2625         }
2626 #endif /* HOSTAPD */
2627
2628         return ifidx;
2629 }
2630
2631
2632 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2633                                 const char *ifname, enum nl80211_iftype iftype,
2634                                 const u8 *addr, int wds)
2635 {
2636         int ret;
2637
2638         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
2639
2640         /* if error occured and interface exists already */
2641         if (ret == -ENFILE && if_nametoindex(ifname)) {
2642                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2643
2644                 /* Try to remove the interface that was already there. */
2645                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2646
2647                 /* Try to create the interface again */
2648                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
2649                                                 wds);
2650         }
2651
2652         return ret;
2653 }
2654
2655
2656 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2657 {
2658         struct ieee80211_hdr *hdr;
2659         u16 fc;
2660         union wpa_event_data event;
2661
2662         hdr = (struct ieee80211_hdr *) buf;
2663         fc = le_to_host16(hdr->frame_control);
2664
2665         os_memset(&event, 0, sizeof(event));
2666         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
2667         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
2668         event.tx_status.dst = hdr->addr1;
2669         event.tx_status.data = buf;
2670         event.tx_status.data_len = len;
2671         event.tx_status.ack = ok;
2672         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
2673 }
2674
2675
2676 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2677                              struct ieee80211_hdr *hdr, size_t len)
2678 {
2679         union wpa_event_data event;
2680         os_memset(&event, 0, sizeof(event));
2681         event.rx_from_unknown.hdr = hdr;
2682         event.rx_from_unknown.len = len;
2683         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
2684 }
2685
2686
2687 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2688                          u8 *buf, size_t len,
2689                          struct hostapd_frame_info *hfi)
2690 {
2691         struct ieee80211_hdr *hdr;
2692         u16 fc;
2693         union wpa_event_data event;
2694
2695         hdr = (struct ieee80211_hdr *) buf;
2696         fc = le_to_host16(hdr->frame_control);
2697
2698         switch (WLAN_FC_GET_TYPE(fc)) {
2699         case WLAN_FC_TYPE_MGMT:
2700                 os_memset(&event, 0, sizeof(event));
2701                 event.rx_mgmt.frame = buf;
2702                 event.rx_mgmt.frame_len = len;
2703                 event.rx_mgmt.fi = hfi;
2704                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
2705                 break;
2706         case WLAN_FC_TYPE_CTRL:
2707                 /* can only get here with PS-Poll frames */
2708                 wpa_printf(MSG_DEBUG, "CTRL");
2709                 from_unknown_sta(drv, hdr, len);
2710                 break;
2711         case WLAN_FC_TYPE_DATA:
2712                 from_unknown_sta(drv, hdr, len);
2713                 break;
2714         }
2715 }
2716
2717
2718 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2719 {
2720         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2721         int len;
2722         unsigned char buf[3000];
2723         struct ieee80211_radiotap_iterator iter;
2724         int ret;
2725         struct hostapd_frame_info hfi;
2726         int injected = 0, failed = 0, rxflags = 0;
2727
2728         len = recv(sock, buf, sizeof(buf), 0);
2729         if (len < 0) {
2730                 perror("recv");
2731                 return;
2732         }
2733
2734         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2735                 printf("received invalid radiotap frame\n");
2736                 return;
2737         }
2738
2739         memset(&hfi, 0, sizeof(hfi));
2740
2741         while (1) {
2742                 ret = ieee80211_radiotap_iterator_next(&iter);
2743                 if (ret == -ENOENT)
2744                         break;
2745                 if (ret) {
2746                         printf("received invalid radiotap frame (%d)\n", ret);
2747                         return;
2748                 }
2749                 switch (iter.this_arg_index) {
2750                 case IEEE80211_RADIOTAP_FLAGS:
2751                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2752                                 len -= 4;
2753                         break;
2754                 case IEEE80211_RADIOTAP_RX_FLAGS:
2755                         rxflags = 1;
2756                         break;
2757                 case IEEE80211_RADIOTAP_TX_FLAGS:
2758                         injected = 1;
2759                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2760                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2761                         break;
2762                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2763                         break;
2764                 case IEEE80211_RADIOTAP_CHANNEL:
2765                         /* TODO convert from freq/flags to channel number
2766                         hfi.channel = XXX;
2767                          */
2768                         break;
2769                 case IEEE80211_RADIOTAP_RATE:
2770                         hfi.datarate = *iter.this_arg * 5;
2771                         break;
2772                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2773                         hfi.ssi_signal = *iter.this_arg;
2774                         break;
2775                 }
2776         }
2777
2778         if (rxflags && injected)
2779                 return;
2780
2781         if (!injected)
2782                 handle_frame(drv, buf + iter.max_length,
2783                              len - iter.max_length, &hfi);
2784         else
2785                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2786                                    len - iter.max_length, !failed);
2787 }
2788
2789
2790 /*
2791  * we post-process the filter code later and rewrite
2792  * this to the offset to the last instruction
2793  */
2794 #define PASS    0xFF
2795 #define FAIL    0xFE
2796
2797 static struct sock_filter msock_filter_insns[] = {
2798         /*
2799          * do a little-endian load of the radiotap length field
2800          */
2801         /* load lower byte into A */
2802         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2803         /* put it into X (== index register) */
2804         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2805         /* load upper byte into A */
2806         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2807         /* left-shift it by 8 */
2808         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2809         /* or with X */
2810         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2811         /* put result into X */
2812         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2813
2814         /*
2815          * Allow management frames through, this also gives us those
2816          * management frames that we sent ourselves with status
2817          */
2818         /* load the lower byte of the IEEE 802.11 frame control field */
2819         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2820         /* mask off frame type and version */
2821         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2822         /* accept frame if it's both 0, fall through otherwise */
2823         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2824
2825         /*
2826          * TODO: add a bit to radiotap RX flags that indicates
2827          * that the sending station is not associated, then
2828          * add a filter here that filters on our DA and that flag
2829          * to allow us to deauth frames to that bad station.
2830          *
2831          * Not a regression -- we didn't do it before either.
2832          */
2833
2834 #if 0
2835         /*
2836          * drop non-data frames
2837          */
2838         /* load the lower byte of the frame control field */
2839         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2840         /* mask off QoS bit */
2841         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2842         /* drop non-data frames */
2843         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2844 #endif
2845         /* load the upper byte of the frame control field */
2846         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
2847         /* mask off toDS/fromDS */
2848         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2849         /* accept WDS frames */
2850         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
2851
2852         /*
2853          * add header length to index
2854          */
2855         /* load the lower byte of the frame control field */
2856         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2857         /* mask off QoS bit */
2858         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2859         /* right shift it by 6 to give 0 or 2 */
2860         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2861         /* add data frame header length */
2862         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2863         /* add index, was start of 802.11 header */
2864         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2865         /* move to index, now start of LL header */
2866         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2867
2868         /*
2869          * Accept empty data frames, we use those for
2870          * polling activity.
2871          */
2872         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2873         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2874
2875         /*
2876          * Accept EAPOL frames
2877          */
2878         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2879         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2880         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2881         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2882
2883         /* keep these last two statements or change the code below */
2884         /* return 0 == "DROP" */
2885         BPF_STMT(BPF_RET | BPF_K, 0),
2886         /* return ~0 == "keep all" */
2887         BPF_STMT(BPF_RET | BPF_K, ~0),
2888 };
2889
2890 static struct sock_fprog msock_filter = {
2891         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2892         .filter = msock_filter_insns,
2893 };
2894
2895
2896 static int add_monitor_filter(int s)
2897 {
2898         int idx;
2899
2900         /* rewrite all PASS/FAIL jump offsets */
2901         for (idx = 0; idx < msock_filter.len; idx++) {
2902                 struct sock_filter *insn = &msock_filter_insns[idx];
2903
2904                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2905                         if (insn->code == (BPF_JMP|BPF_JA)) {
2906                                 if (insn->k == PASS)
2907                                         insn->k = msock_filter.len - idx - 2;
2908                                 else if (insn->k == FAIL)
2909                                         insn->k = msock_filter.len - idx - 3;
2910                         }
2911
2912                         if (insn->jt == PASS)
2913                                 insn->jt = msock_filter.len - idx - 2;
2914                         else if (insn->jt == FAIL)
2915                                 insn->jt = msock_filter.len - idx - 3;
2916
2917                         if (insn->jf == PASS)
2918                                 insn->jf = msock_filter.len - idx - 2;
2919                         else if (insn->jf == FAIL)
2920                                 insn->jf = msock_filter.len - idx - 3;
2921                 }
2922         }
2923
2924         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2925                        &msock_filter, sizeof(msock_filter))) {
2926                 perror("SO_ATTACH_FILTER");
2927                 return -1;
2928         }
2929
2930         return 0;
2931 }
2932
2933
2934 static void nl80211_remove_monitor_interface(
2935         struct wpa_driver_nl80211_data *drv)
2936 {
2937         if (drv->monitor_ifidx >= 0) {
2938                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2939                 drv->monitor_ifidx = -1;
2940         }
2941 }
2942
2943
2944 static int
2945 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2946 {
2947         char buf[IFNAMSIZ];
2948         struct sockaddr_ll ll;
2949         int optval;
2950         socklen_t optlen;
2951
2952         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2953         buf[IFNAMSIZ - 1] = '\0';
2954
2955         drv->monitor_ifidx =
2956                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
2957                                      0);
2958
2959         if (drv->monitor_ifidx < 0)
2960                 return -1;
2961
2962         if (hostapd_set_iface_flags(drv, buf, 1))
2963                 goto error;
2964
2965         memset(&ll, 0, sizeof(ll));
2966         ll.sll_family = AF_PACKET;
2967         ll.sll_ifindex = drv->monitor_ifidx;
2968         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2969         if (drv->monitor_sock < 0) {
2970                 perror("socket[PF_PACKET,SOCK_RAW]");
2971                 goto error;
2972         }
2973
2974         if (add_monitor_filter(drv->monitor_sock)) {
2975                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2976                            "interface; do filtering in user space");
2977                 /* This works, but will cost in performance. */
2978         }
2979
2980         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2981                 perror("monitor socket bind");
2982                 goto error;
2983         }
2984
2985         optlen = sizeof(optval);
2986         optval = 20;
2987         if (setsockopt
2988             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2989                 perror("Failed to set socket priority");
2990                 goto error;
2991         }
2992
2993         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2994                                      drv, NULL)) {
2995                 printf("Could not register monitor read socket\n");
2996                 goto error;
2997         }
2998
2999         return 0;
3000  error:
3001         nl80211_remove_monitor_interface(drv);
3002         return -1;
3003 }
3004
3005
3006 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3007
3008 static int wpa_driver_nl80211_hapd_send_eapol(
3009         void *priv, const u8 *addr, const u8 *data,
3010         size_t data_len, int encrypt, const u8 *own_addr)
3011 {
3012         struct wpa_driver_nl80211_data *drv = priv;
3013         struct ieee80211_hdr *hdr;
3014         size_t len;
3015         u8 *pos;
3016         int res;
3017 #if 0 /* FIX */
3018         int qos = sta->flags & WPA_STA_WMM;
3019 #else
3020         int qos = 0;
3021 #endif
3022
3023         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3024                 data_len;
3025         hdr = os_zalloc(len);
3026         if (hdr == NULL) {
3027                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3028                        (unsigned long) len);
3029                 return -1;
3030         }
3031
3032         hdr->frame_control =
3033                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3034         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3035         if (encrypt)
3036                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3037 #if 0 /* To be enabled if qos determination is added above */
3038         if (qos) {
3039                 hdr->frame_control |=
3040                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3041         }
3042 #endif
3043
3044         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3045         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3046         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3047         pos = (u8 *) (hdr + 1);
3048
3049 #if 0 /* To be enabled if qos determination is added above */
3050         if (qos) {
3051                 /* add an empty QoS header if needed */
3052                 pos[0] = 0;
3053                 pos[1] = 0;
3054                 pos += 2;
3055         }
3056 #endif
3057
3058         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3059         pos += sizeof(rfc1042_header);
3060         WPA_PUT_BE16(pos, ETH_P_PAE);
3061         pos += 2;
3062         memcpy(pos, data, data_len);
3063
3064         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3065         if (res < 0) {
3066                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3067                            "failed: %d (%s)",
3068                            (unsigned long) len, errno, strerror(errno));
3069         }
3070         os_free(hdr);
3071
3072         return res;
3073 }
3074
3075
3076 static u32 sta_flags_nl80211(int flags)
3077 {
3078         u32 f = 0;
3079
3080         if (flags & WPA_STA_AUTHORIZED)
3081                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3082         if (flags & WPA_STA_WMM)
3083                 f |= BIT(NL80211_STA_FLAG_WME);
3084         if (flags & WPA_STA_SHORT_PREAMBLE)
3085                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3086         if (flags & WPA_STA_MFP)
3087                 f |= BIT(NL80211_STA_FLAG_MFP);
3088
3089         return f;
3090 }
3091
3092
3093 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3094                                             int total_flags, int flags_or,
3095                                             int flags_and)
3096 {
3097         struct wpa_driver_nl80211_data *drv = priv;
3098         struct nl_msg *msg, *flags = NULL;
3099         struct nl80211_sta_flag_update upd;
3100
3101         msg = nlmsg_alloc();
3102         if (!msg)
3103                 return -ENOMEM;
3104
3105         flags = nlmsg_alloc();
3106         if (!flags) {
3107                 nlmsg_free(msg);
3108                 return -ENOMEM;
3109         }
3110
3111         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3112                     0, NL80211_CMD_SET_STATION, 0);
3113
3114         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3115                     if_nametoindex(drv->ifname));
3116         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3117
3118         /*
3119          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3120          * can be removed eventually.
3121          */
3122         if (total_flags & WPA_STA_AUTHORIZED)
3123                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3124
3125         if (total_flags & WPA_STA_WMM)
3126                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3127
3128         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3129                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3130
3131         if (total_flags & WPA_STA_MFP)
3132                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3133
3134         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3135                 goto nla_put_failure;
3136
3137         os_memset(&upd, 0, sizeof(upd));
3138         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3139         upd.set = sta_flags_nl80211(flags_or);
3140         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3141
3142         nlmsg_free(flags);
3143
3144         return send_and_recv_msgs(drv, msg, NULL, NULL);
3145  nla_put_failure:
3146         nlmsg_free(flags);
3147         return -ENOBUFS;
3148 }
3149
3150
3151 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3152                                  struct wpa_driver_associate_params *params)
3153 {
3154         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3155             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3156                 nl80211_remove_monitor_interface(drv);
3157                 return -1;
3158         }
3159
3160         /* TODO: setup monitor interface (and add code somewhere to remove this
3161          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3162
3163         return 0;
3164 }
3165
3166
3167 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3168 {
3169         struct nl_msg *msg;
3170         int ret = -1;
3171
3172         msg = nlmsg_alloc();
3173         if (!msg)
3174                 return -1;
3175
3176         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3177                     NL80211_CMD_LEAVE_IBSS, 0);
3178         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3179         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3180         msg = NULL;
3181         if (ret) {
3182                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3183                            "(%s)", ret, strerror(-ret));
3184                 goto nla_put_failure;
3185         }
3186
3187         ret = 0;
3188         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3189
3190 nla_put_failure:
3191         nlmsg_free(msg);
3192         return ret;
3193 }
3194
3195
3196 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3197                                    struct wpa_driver_associate_params *params)
3198 {
3199         struct nl_msg *msg;
3200         int ret = -1;
3201         int count = 0;
3202
3203         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3204
3205         if (wpa_driver_nl80211_set_mode(drv, params->mode)) {
3206                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3207                            "IBSS mode");
3208                 return -1;
3209         }
3210
3211 retry:
3212         msg = nlmsg_alloc();
3213         if (!msg)
3214                 return -1;
3215
3216         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3217                     NL80211_CMD_JOIN_IBSS, 0);
3218         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3219
3220         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3221                 goto nla_put_failure;
3222
3223         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3224                           params->ssid, params->ssid_len);
3225         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3226                 params->ssid);
3227         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3228         drv->ssid_len = params->ssid_len;
3229
3230         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3231         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3232
3233         ret = nl80211_set_conn_keys(params, msg);
3234         if (ret)
3235                 goto nla_put_failure;
3236
3237         if (params->wpa_ie) {
3238                 wpa_hexdump(MSG_DEBUG,
3239                             "  * Extra IEs for Beacon/Probe Response frames",
3240                             params->wpa_ie, params->wpa_ie_len);
3241                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3242                         params->wpa_ie);
3243         }
3244
3245         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3246         msg = NULL;
3247         if (ret) {
3248                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3249                            ret, strerror(-ret));
3250                 count++;
3251                 if (ret == -EALREADY && count == 1) {
3252                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3253                                    "forced leave");
3254                         nl80211_leave_ibss(drv);
3255                         nlmsg_free(msg);
3256                         goto retry;
3257                 }
3258
3259                 goto nla_put_failure;
3260         }
3261         ret = 0;
3262         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3263
3264 nla_put_failure:
3265         nlmsg_free(msg);
3266         return ret;
3267 }
3268
3269
3270 static int wpa_driver_nl80211_connect(
3271         struct wpa_driver_nl80211_data *drv,
3272         struct wpa_driver_associate_params *params)
3273 {
3274         struct nl_msg *msg;
3275         enum nl80211_auth_type type;
3276         int ret = 0;
3277
3278         msg = nlmsg_alloc();
3279         if (!msg)
3280                 return -1;
3281
3282         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3283         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3284                     NL80211_CMD_CONNECT, 0);
3285
3286         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3287         if (params->bssid) {
3288                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3289                            MAC2STR(params->bssid));
3290                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3291         }
3292         if (params->freq) {
3293                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3294                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3295         }
3296         if (params->ssid) {
3297                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3298                                   params->ssid, params->ssid_len);
3299                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3300                         params->ssid);
3301                 if (params->ssid_len > sizeof(drv->ssid))
3302                         goto nla_put_failure;
3303                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3304                 drv->ssid_len = params->ssid_len;
3305         }
3306         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3307         if (params->wpa_ie)
3308                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3309                         params->wpa_ie);
3310
3311         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3312                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3313         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3314                 type = NL80211_AUTHTYPE_SHARED_KEY;
3315         else if (params->auth_alg & AUTH_ALG_LEAP)
3316                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3317         else if (params->auth_alg & AUTH_ALG_FT)
3318                 type = NL80211_AUTHTYPE_FT;
3319         else
3320                 goto nla_put_failure;
3321
3322         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3323         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3324
3325         if (params->wpa_ie && params->wpa_ie_len) {
3326                 enum nl80211_wpa_versions ver;
3327
3328                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3329                         ver = NL80211_WPA_VERSION_2;
3330                 else
3331                         ver = NL80211_WPA_VERSION_1;
3332
3333                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3334                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3335         }
3336
3337         if (params->pairwise_suite != CIPHER_NONE) {
3338                 int cipher;
3339
3340                 switch (params->pairwise_suite) {
3341                 case CIPHER_WEP40:
3342                         cipher = WLAN_CIPHER_SUITE_WEP40;
3343                         break;
3344                 case CIPHER_WEP104:
3345                         cipher = WLAN_CIPHER_SUITE_WEP104;
3346                         break;
3347                 case CIPHER_CCMP:
3348                         cipher = WLAN_CIPHER_SUITE_CCMP;
3349                         break;
3350                 case CIPHER_TKIP:
3351                 default:
3352                         cipher = WLAN_CIPHER_SUITE_TKIP;
3353                         break;
3354                 }
3355                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3356         }
3357
3358         if (params->group_suite != CIPHER_NONE) {
3359                 int cipher;
3360
3361                 switch (params->group_suite) {
3362                 case CIPHER_WEP40:
3363                         cipher = WLAN_CIPHER_SUITE_WEP40;
3364                         break;
3365                 case CIPHER_WEP104:
3366                         cipher = WLAN_CIPHER_SUITE_WEP104;
3367                         break;
3368                 case CIPHER_CCMP:
3369                         cipher = WLAN_CIPHER_SUITE_CCMP;
3370                         break;
3371                 case CIPHER_TKIP:
3372                 default:
3373                         cipher = WLAN_CIPHER_SUITE_TKIP;
3374                         break;
3375                 }
3376                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3377         }
3378
3379         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3380             params->key_mgmt_suite == KEY_MGMT_PSK) {
3381                 int mgmt = WLAN_AKM_SUITE_PSK;
3382
3383                 switch (params->key_mgmt_suite) {
3384                 case KEY_MGMT_802_1X:
3385                         mgmt = WLAN_AKM_SUITE_8021X;
3386                         break;
3387                 case KEY_MGMT_PSK:
3388                 default:
3389                         mgmt = WLAN_AKM_SUITE_PSK;
3390                         break;
3391                 }
3392                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3393         }
3394
3395         ret = nl80211_set_conn_keys(params, msg);
3396         if (ret)
3397                 goto nla_put_failure;
3398
3399         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3400         msg = NULL;
3401         if (ret) {
3402                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3403                            "(%s)", ret, strerror(-ret));
3404                 goto nla_put_failure;
3405         }
3406         ret = 0;
3407         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3408
3409 nla_put_failure:
3410         nlmsg_free(msg);
3411         return ret;
3412
3413 }
3414
3415
3416 static int wpa_driver_nl80211_associate(
3417         void *priv, struct wpa_driver_associate_params *params)
3418 {
3419         struct wpa_driver_nl80211_data *drv = priv;
3420         int ret = -1;
3421         struct nl_msg *msg;
3422
3423         if (params->mode == IEEE80211_MODE_AP)
3424                 return wpa_driver_nl80211_ap(drv, params);
3425
3426         if (params->mode == IEEE80211_MODE_IBSS)
3427                 return wpa_driver_nl80211_ibss(drv, params);
3428
3429         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3430                 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3431                         return -1;
3432                 return wpa_driver_nl80211_connect(drv, params);
3433         }
3434
3435         drv->associated = 0;
3436
3437         msg = nlmsg_alloc();
3438         if (!msg)
3439                 return -1;
3440
3441         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3442                    drv->ifindex);
3443         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3444                     NL80211_CMD_ASSOCIATE, 0);
3445
3446         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3447         if (params->bssid) {
3448                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3449                            MAC2STR(params->bssid));
3450                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3451         }
3452         if (params->freq) {
3453                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3454                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3455                 drv->assoc_freq = params->freq;
3456         } else
3457                 drv->assoc_freq = 0;
3458         if (params->ssid) {
3459                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3460                                   params->ssid, params->ssid_len);
3461                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3462                         params->ssid);
3463                 if (params->ssid_len > sizeof(drv->ssid))
3464                         goto nla_put_failure;
3465                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3466                 drv->ssid_len = params->ssid_len;
3467         }
3468         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3469         if (params->wpa_ie)
3470                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3471                         params->wpa_ie);
3472
3473 #ifdef CONFIG_IEEE80211W
3474         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3475                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3476 #endif /* CONFIG_IEEE80211W */
3477
3478         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3479
3480         if (params->prev_bssid) {
3481                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3482                            MAC2STR(params->prev_bssid));
3483                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3484                         params->prev_bssid);
3485         }
3486
3487         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3488         msg = NULL;
3489         if (ret) {
3490                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3491                            "(%s)", ret, strerror(-ret));
3492                 goto nla_put_failure;
3493         }
3494         ret = 0;
3495         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3496                    "successfully");
3497
3498 nla_put_failure:
3499         nlmsg_free(msg);
3500         return ret;
3501 }
3502
3503
3504 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3505                             int ifindex, int mode)
3506 {
3507         struct nl_msg *msg;
3508         int ret = -ENOBUFS;
3509
3510         msg = nlmsg_alloc();
3511         if (!msg)
3512                 return -ENOMEM;
3513
3514         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3515                     0, NL80211_CMD_SET_INTERFACE, 0);
3516         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3517         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3518
3519         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3520         if (!ret)
3521                 return 0;
3522 nla_put_failure:
3523         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3524                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3525         return ret;
3526 }
3527
3528
3529 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3530 {
3531         struct wpa_driver_nl80211_data *drv = priv;
3532         int ret = -1;
3533         int nlmode;
3534
3535         switch (mode) {
3536         case 0:
3537                 nlmode = NL80211_IFTYPE_STATION;
3538                 break;
3539         case 1:
3540                 nlmode = NL80211_IFTYPE_ADHOC;
3541                 break;
3542         case 2:
3543                 nlmode = NL80211_IFTYPE_AP;
3544                 break;
3545         default:
3546                 return -1;
3547         }
3548
3549         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3550                 drv->nlmode = nlmode;
3551                 ret = 0;
3552                 goto done;
3553         }
3554
3555         if (nlmode == drv->nlmode) {
3556                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
3557                            "requested mode - ignore error");
3558                 ret = 0;
3559                 goto done; /* Already in the requested mode */
3560         }
3561
3562         /* mac80211 doesn't allow mode changes while the device is up, so
3563          * take the device down, try to set the mode again, and bring the
3564          * device back up.
3565          */
3566         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3567                 /* Try to set the mode again while the interface is down */
3568                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3569                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3570                         ret = -1;
3571         }
3572
3573         if (!ret) {
3574                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
3575                            "interface is down");
3576                 drv->nlmode = nlmode;
3577         }
3578
3579 done:
3580         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3581                 /* Setup additional AP mode functionality if needed */
3582                 if (drv->monitor_ifidx < 0 &&
3583                     nl80211_create_monitor_interface(drv))
3584                         return -1;
3585         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3586                 /* Remove additional AP mode functionality */
3587                 nl80211_remove_monitor_interface(drv);
3588         }
3589
3590         if (ret)
3591                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
3592                            "from %d failed", nlmode, drv->nlmode);
3593
3594         return ret;
3595 }
3596
3597
3598 static int wpa_driver_nl80211_get_capa(void *priv,
3599                                        struct wpa_driver_capa *capa)
3600 {
3601         struct wpa_driver_nl80211_data *drv = priv;
3602         if (!drv->has_capability)
3603                 return -1;
3604         os_memcpy(capa, &drv->capa, sizeof(*capa));
3605         return 0;
3606 }
3607
3608
3609 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3610 {
3611         struct wpa_driver_nl80211_data *drv = priv;
3612
3613         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3614                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3615         drv->operstate = state;
3616         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
3617                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
3618 }
3619
3620
3621 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3622 {
3623         struct wpa_driver_nl80211_data *drv = priv;
3624         struct nl_msg *msg;
3625         struct nl80211_sta_flag_update upd;
3626
3627         msg = nlmsg_alloc();
3628         if (!msg)
3629                 return -ENOMEM;
3630
3631         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3632                     0, NL80211_CMD_SET_STATION, 0);
3633
3634         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3635                     if_nametoindex(drv->ifname));
3636         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3637
3638         os_memset(&upd, 0, sizeof(upd));
3639         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3640         if (authorized)
3641                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3642         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3643
3644         return send_and_recv_msgs(drv, msg, NULL, NULL);
3645  nla_put_failure:
3646         return -ENOBUFS;
3647 }
3648
3649
3650 #ifdef HOSTAPD
3651
3652 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3653                                  int ifindex)
3654 {
3655         struct i802_bss *bss = &drv->bss;
3656         while (bss) {
3657                 if (ifindex == bss->ifindex)
3658                         return bss;
3659                 bss = bss->next;
3660         }
3661         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3662         return NULL;
3663 }
3664
3665
3666 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3667 {
3668         int i;
3669         int *old;
3670
3671         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3672                    ifidx);
3673         for (i = 0; i < drv->num_if_indices; i++) {
3674                 if (drv->if_indices[i] == 0) {
3675                         drv->if_indices[i] = ifidx;
3676                         return;
3677                 }
3678         }
3679
3680         if (drv->if_indices != drv->default_if_indices)
3681                 old = drv->if_indices;
3682         else
3683                 old = NULL;
3684
3685         drv->if_indices = os_realloc(old,
3686                                      sizeof(int) * (drv->num_if_indices + 1));
3687         if (!drv->if_indices) {
3688                 if (!old)
3689                         drv->if_indices = drv->default_if_indices;
3690                 else
3691                         drv->if_indices = old;
3692                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3693                            "interfaces");
3694                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3695                 return;
3696         }
3697         drv->if_indices[drv->num_if_indices] = ifidx;
3698         drv->num_if_indices++;
3699 }
3700
3701
3702 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3703 {
3704         int i;
3705
3706         for (i = 0; i < drv->num_if_indices; i++) {
3707                 if (drv->if_indices[i] == ifidx) {
3708                         drv->if_indices[i] = 0;
3709                         break;
3710                 }
3711         }
3712 }
3713
3714
3715 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3716 {
3717         int i;
3718
3719         for (i = 0; i < drv->num_if_indices; i++)
3720                 if (drv->if_indices[i] == ifidx)
3721                         return 1;
3722
3723         return 0;
3724 }
3725
3726
3727 static inline int min_int(int a, int b)
3728 {
3729         if (a < b)
3730                 return a;
3731         return b;
3732 }
3733
3734
3735 static int get_key_handler(struct nl_msg *msg, void *arg)
3736 {
3737         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3738         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3739
3740         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3741                   genlmsg_attrlen(gnlh, 0), NULL);
3742
3743         /*
3744          * TODO: validate the key index and mac address!
3745          * Otherwise, there's a race condition as soon as
3746          * the kernel starts sending key notifications.
3747          */
3748
3749         if (tb[NL80211_ATTR_KEY_SEQ])
3750                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3751                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3752         return NL_SKIP;
3753 }
3754
3755
3756 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3757                            int idx, u8 *seq)
3758 {
3759         struct wpa_driver_nl80211_data *drv = priv;
3760         struct nl_msg *msg;
3761
3762         msg = nlmsg_alloc();
3763         if (!msg)
3764                 return -ENOMEM;
3765
3766         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3767                     0, NL80211_CMD_GET_KEY, 0);
3768
3769         if (addr)
3770                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3771         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3772         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3773
3774         memset(seq, 0, 6);
3775
3776         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3777  nla_put_failure:
3778         return -ENOBUFS;
3779 }
3780
3781
3782 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3783                               int mode)
3784 {
3785         struct wpa_driver_nl80211_data *drv = priv;
3786         struct nl_msg *msg;
3787         u8 rates[NL80211_MAX_SUPP_RATES];
3788         u8 rates_len = 0;
3789         int i;
3790
3791         msg = nlmsg_alloc();
3792         if (!msg)
3793                 return -ENOMEM;
3794
3795         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3796                     NL80211_CMD_SET_BSS, 0);
3797
3798         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3799                 rates[rates_len++] = basic_rates[i] / 5;
3800
3801         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3802
3803         /* TODO: multi-BSS support */
3804         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3805
3806         return send_and_recv_msgs(drv, msg, NULL, NULL);
3807  nla_put_failure:
3808         return -ENOBUFS;
3809 }
3810
3811
3812 /* Set kernel driver on given frequency (MHz) */
3813 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3814 {
3815         struct wpa_driver_nl80211_data *drv = priv;
3816         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3817                                            freq->sec_channel_offset);
3818 }
3819
3820
3821 static int i802_set_rts(void *priv, int rts)
3822 {
3823         struct wpa_driver_nl80211_data *drv = priv;
3824         struct nl_msg *msg;
3825         int ret = -ENOBUFS;
3826         u32 val;
3827
3828         msg = nlmsg_alloc();
3829         if (!msg)
3830                 return -ENOMEM;
3831
3832         if (rts >= 2347)
3833                 val = (u32) -1;
3834         else
3835                 val = rts;
3836
3837         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3838                     0, NL80211_CMD_SET_WIPHY, 0);
3839         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3840         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3841
3842         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3843         if (!ret)
3844                 return 0;
3845 nla_put_failure:
3846         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3847                    "%d (%s)", rts, ret, strerror(-ret));
3848         return ret;
3849 }
3850
3851
3852 static int i802_set_frag(void *priv, int frag)
3853 {
3854         struct wpa_driver_nl80211_data *drv = priv;
3855         struct nl_msg *msg;
3856         int ret = -ENOBUFS;
3857         u32 val;
3858
3859         msg = nlmsg_alloc();
3860         if (!msg)
3861                 return -ENOMEM;
3862
3863         if (frag >= 2346)
3864                 val = (u32) -1;
3865         else
3866                 val = frag;
3867
3868         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3869                     0, NL80211_CMD_SET_WIPHY, 0);
3870         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3871         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3872
3873         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3874         if (!ret)
3875                 return 0;
3876 nla_put_failure:
3877         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3878                    "%d: %d (%s)", frag, ret, strerror(-ret));
3879         return ret;
3880 }
3881
3882
3883 static int i802_flush(void *priv)
3884 {
3885         struct wpa_driver_nl80211_data *drv = priv;
3886         struct nl_msg *msg;
3887
3888         msg = nlmsg_alloc();
3889         if (!msg)
3890                 return -1;
3891
3892         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3893                     0, NL80211_CMD_DEL_STATION, 0);
3894
3895         /*
3896          * XXX: FIX! this needs to flush all VLANs too
3897          */
3898         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3899                     if_nametoindex(drv->ifname));
3900
3901         return send_and_recv_msgs(drv, msg, NULL, NULL);
3902  nla_put_failure:
3903         return -ENOBUFS;
3904 }
3905
3906
3907 static int get_sta_handler(struct nl_msg *msg, void *arg)
3908 {
3909         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3910         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3911         struct hostap_sta_driver_data *data = arg;
3912         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3913         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3914                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3915                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3916                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3917                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3918                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3919         };
3920
3921         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3922                   genlmsg_attrlen(gnlh, 0), NULL);
3923
3924         /*
3925          * TODO: validate the interface and mac address!
3926          * Otherwise, there's a race condition as soon as
3927          * the kernel starts sending station notifications.
3928          */
3929
3930         if (!tb[NL80211_ATTR_STA_INFO]) {
3931                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3932                 return NL_SKIP;
3933         }
3934         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3935                              tb[NL80211_ATTR_STA_INFO],
3936                              stats_policy)) {
3937                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3938                 return NL_SKIP;
3939         }
3940
3941         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3942                 data->inactive_msec =
3943                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3944         if (stats[NL80211_STA_INFO_RX_BYTES])
3945                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3946         if (stats[NL80211_STA_INFO_TX_BYTES])
3947                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3948         if (stats[NL80211_STA_INFO_RX_PACKETS])
3949                 data->rx_packets =
3950                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3951         if (stats[NL80211_STA_INFO_TX_PACKETS])
3952                 data->tx_packets =
3953                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3954
3955         return NL_SKIP;
3956 }
3957
3958 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3959                               const u8 *addr)
3960 {
3961         struct wpa_driver_nl80211_data *drv = priv;
3962         struct nl_msg *msg;
3963
3964         os_memset(data, 0, sizeof(*data));
3965         msg = nlmsg_alloc();
3966         if (!msg)
3967                 return -ENOMEM;
3968
3969         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3970                     0, NL80211_CMD_GET_STATION, 0);
3971
3972         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3973         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3974
3975         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3976  nla_put_failure:
3977         return -ENOBUFS;
3978 }
3979
3980
3981 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3982                                     int cw_min, int cw_max, int burst_time)
3983 {
3984         struct wpa_driver_nl80211_data *drv = priv;
3985         struct nl_msg *msg;
3986         struct nlattr *txq, *params;
3987
3988         msg = nlmsg_alloc();
3989         if (!msg)
3990                 return -1;
3991
3992         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3993                     0, NL80211_CMD_SET_WIPHY, 0);
3994
3995         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3996
3997         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3998         if (!txq)
3999                 goto nla_put_failure;
4000
4001         /* We are only sending parameters for a single TXQ at a time */
4002         params = nla_nest_start(msg, 1);
4003         if (!params)
4004                 goto nla_put_failure;
4005
4006         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4007         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4008          * 32 usec, so need to convert the value here. */
4009         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4010         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4011         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4012         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4013
4014         nla_nest_end(msg, params);
4015
4016         nla_nest_end(msg, txq);
4017
4018         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4019                 return 0;
4020  nla_put_failure:
4021         return -1;
4022 }
4023
4024
4025 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4026 {
4027         struct wpa_driver_nl80211_data *drv = priv;
4028         struct nl_msg *msg;
4029
4030         msg = nlmsg_alloc();
4031         if (!msg)
4032                 return -ENOMEM;
4033
4034         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4035                     NL80211_CMD_SET_BSS, 0);
4036
4037         if (cts >= 0)
4038                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4039         if (preamble >= 0)
4040                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4041         if (slot >= 0)
4042                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4043
4044         /* TODO: multi-BSS support */
4045         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4046
4047         return send_and_recv_msgs(drv, msg, NULL, NULL);
4048  nla_put_failure:
4049         return -ENOBUFS;
4050 }
4051
4052
4053 static int i802_set_cts_protect(void *priv, int value)
4054 {
4055         return i802_set_bss(priv, value, -1, -1);
4056 }
4057
4058
4059 static int i802_set_preamble(void *priv, int value)
4060 {
4061         return i802_set_bss(priv, -1, value, -1);
4062 }
4063
4064
4065 static int i802_set_short_slot_time(void *priv, int value)
4066 {
4067         return i802_set_bss(priv, -1, -1, value);
4068 }
4069
4070
4071 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4072                              const char *ifname, int vlan_id)
4073 {
4074         struct wpa_driver_nl80211_data *drv = priv;
4075         struct nl_msg *msg;
4076
4077         msg = nlmsg_alloc();
4078         if (!msg)
4079                 return -ENOMEM;
4080
4081         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4082                     0, NL80211_CMD_SET_STATION, 0);
4083
4084         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4085                     if_nametoindex(drv->ifname));
4086         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4087         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4088                     if_nametoindex(ifname));
4089
4090         return send_and_recv_msgs(drv, msg, NULL, NULL);
4091  nla_put_failure:
4092         return -ENOBUFS;
4093 }
4094
4095
4096 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4097 {
4098         struct wpa_driver_nl80211_data *drv = priv;
4099         char name[16];
4100
4101         os_snprintf(name, sizeof(name), "%s.sta%d", drv->ifname, aid);
4102         if (val) {
4103                 if (nl80211_create_iface(priv, name, NL80211_IFTYPE_AP_VLAN,
4104                                          NULL, 1) < 0)
4105                         return -1;
4106                 hostapd_set_iface_flags(drv, name, 1);
4107                 return i802_set_sta_vlan(priv, addr, name, 0);
4108         } else {
4109                 i802_set_sta_vlan(priv, addr, drv->ifname, 0);
4110                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4111                                                     name);
4112         }
4113 }
4114
4115
4116 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4117 {
4118         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4119         struct sockaddr_ll lladdr;
4120         unsigned char buf[3000];
4121         int len;
4122         socklen_t fromlen = sizeof(lladdr);
4123
4124         len = recvfrom(sock, buf, sizeof(buf), 0,
4125                        (struct sockaddr *)&lladdr, &fromlen);
4126         if (len < 0) {
4127                 perror("recv");
4128                 return;
4129         }
4130
4131         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4132                 void *ctx;
4133                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4134                 if (!ctx)
4135                         return;
4136                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4137         }
4138 }
4139
4140
4141 static int i802_get_inact_sec(void *priv, const u8 *addr)
4142 {
4143         struct hostap_sta_driver_data data;
4144         int ret;
4145
4146         data.inactive_msec = (unsigned long) -1;
4147         ret = i802_read_sta_data(priv, &data, addr);
4148         if (ret || data.inactive_msec == (unsigned long) -1)
4149                 return -1;
4150         return data.inactive_msec / 1000;
4151 }
4152
4153
4154 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4155 {
4156 #if 0
4157         /* TODO */
4158 #endif
4159         return 0;
4160 }
4161
4162
4163 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4164                            int reason)
4165 {
4166         struct wpa_driver_nl80211_data *drv = priv;
4167         struct ieee80211_mgmt mgmt;
4168
4169         memset(&mgmt, 0, sizeof(mgmt));
4170         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4171                                           WLAN_FC_STYPE_DEAUTH);
4172         memcpy(mgmt.da, addr, ETH_ALEN);
4173         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4174         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4175         mgmt.u.deauth.reason_code = host_to_le16(reason);
4176         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4177                                             IEEE80211_HDRLEN +
4178                                             sizeof(mgmt.u.deauth));
4179 }
4180
4181
4182 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4183                              int reason)
4184 {
4185         struct wpa_driver_nl80211_data *drv = priv;
4186         struct ieee80211_mgmt mgmt;
4187
4188         memset(&mgmt, 0, sizeof(mgmt));
4189         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4190                                           WLAN_FC_STYPE_DISASSOC);
4191         memcpy(mgmt.da, addr, ETH_ALEN);
4192         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4193         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4194         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4195         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4196                                             IEEE80211_HDRLEN +
4197                                             sizeof(mgmt.u.disassoc));
4198 }
4199
4200
4201 static void *i802_init(struct hostapd_data *hapd,
4202                        struct wpa_init_params *params)
4203 {
4204         struct wpa_driver_nl80211_data *drv;
4205         size_t i;
4206
4207         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4208         if (drv == NULL)
4209                 return NULL;
4210
4211         drv->bss.ifindex = drv->ifindex;
4212
4213         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4214         drv->if_indices = drv->default_if_indices;
4215         for (i = 0; i < params->num_bridge; i++) {
4216                 if (params->bridge[i])
4217                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4218         }
4219
4220         /* start listening for EAPOL on the default AP interface */
4221         add_ifidx(drv, drv->ifindex);
4222
4223         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4224                 goto failed;
4225
4226         if (params->bssid) {
4227                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4228                         goto failed;
4229         }
4230
4231         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
4232                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4233                            "into AP mode", drv->ifname);
4234                 goto failed;
4235         }
4236
4237         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4238                 goto failed;
4239
4240         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4241         if (drv->eapol_sock < 0) {
4242                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4243                 goto failed;
4244         }
4245
4246         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4247         {
4248                 printf("Could not register read socket for eapol\n");
4249                 goto failed;
4250         }
4251
4252         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4253                 goto failed;
4254
4255         return drv;
4256
4257 failed:
4258         nl80211_remove_monitor_interface(drv);
4259         if (drv->ioctl_sock >= 0)
4260                 close(drv->ioctl_sock);
4261
4262         genl_family_put(drv->nl80211);
4263         nl_cache_free(drv->nl_cache);
4264         nl_handle_destroy(drv->nl_handle);
4265         nl_cb_put(drv->nl_cb);
4266
4267         os_free(drv);
4268         return NULL;
4269 }
4270
4271
4272 static void i802_deinit(void *priv)
4273 {
4274         wpa_driver_nl80211_deinit(priv);
4275 }
4276
4277 #endif /* HOSTAPD */
4278
4279
4280 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4281         enum wpa_driver_if_type type)
4282 {
4283         switch (type) {
4284         case WPA_IF_STATION:
4285                 return NL80211_IFTYPE_STATION;
4286         case WPA_IF_AP_VLAN:
4287                 return NL80211_IFTYPE_AP_VLAN;
4288         case WPA_IF_AP_BSS:
4289                 return NL80211_IFTYPE_AP;
4290         }
4291         return -1;
4292 }
4293
4294
4295 static int wpa_driver_nl80211_if_add(const char *iface, void *priv,
4296                                      enum wpa_driver_if_type type,
4297                                      const char *ifname, const u8 *addr,
4298                                      void *bss_ctx)
4299 {
4300         struct wpa_driver_nl80211_data *drv = priv;
4301         int ifidx;
4302 #ifdef HOSTAPD
4303         struct i802_bss *bss = NULL;
4304
4305         if (type == WPA_IF_AP_BSS) {
4306                 bss = os_zalloc(sizeof(*bss));
4307                 if (bss == NULL)
4308                         return -1;
4309         }
4310 #endif /* HOSTAPD */
4311
4312         ifidx = nl80211_create_iface(drv, ifname,
4313                                      wpa_driver_nl80211_if_type(type), addr,
4314                                      0);
4315         if (ifidx < 0) {
4316 #ifdef HOSTAPD
4317                 os_free(bss);
4318 #endif /* HOSTAPD */
4319                 return -1;
4320         }
4321
4322 #ifdef HOSTAPD
4323         if (type == WPA_IF_AP_BSS) {
4324                 if (hostapd_set_iface_flags(priv, ifname, 1)) {
4325                         nl80211_remove_iface(priv, ifidx);
4326                         os_free(bss);
4327                         return -1;
4328                 }
4329                 bss->ifindex = ifidx;
4330                 bss->next = drv->bss.next;
4331                 drv->bss.next = bss;
4332         }
4333 #endif /* HOSTAPD */
4334
4335         return 0;
4336 }
4337
4338
4339 static int wpa_driver_nl80211_if_remove(void *priv,
4340                                         enum wpa_driver_if_type type,
4341                                         const char *ifname)
4342 {
4343         struct wpa_driver_nl80211_data *drv = priv;
4344         int ifindex = if_nametoindex(ifname);
4345
4346         nl80211_remove_iface(drv, ifindex);
4347
4348 #ifdef HOSTAPD
4349         if (type == WPA_IF_AP_BSS) {
4350                 struct i802_bss *bss, *prev;
4351                 prev = &drv->bss;
4352                 bss = drv->bss.next;
4353                 while (bss) {
4354                         if (ifindex == bss->ifindex) {
4355                                 prev->next = bss->next;
4356                                 os_free(bss);
4357                                 break;
4358                         }
4359                         prev = bss;
4360                         bss = bss->next;
4361                 }
4362         }
4363 #endif /* HOSTAPD */
4364
4365         return 0;
4366 }
4367
4368
4369 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4370         .name = "nl80211",
4371         .desc = "Linux nl80211/cfg80211",
4372         .get_bssid = wpa_driver_nl80211_get_bssid,
4373         .get_ssid = wpa_driver_nl80211_get_ssid,
4374         .set_key = wpa_driver_nl80211_set_key,
4375         .scan2 = wpa_driver_nl80211_scan,
4376         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4377         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4378         .disassociate = wpa_driver_nl80211_disassociate,
4379         .authenticate = wpa_driver_nl80211_authenticate,
4380         .associate = wpa_driver_nl80211_associate,
4381         .init = wpa_driver_nl80211_init,
4382         .deinit = wpa_driver_nl80211_deinit,
4383         .get_capa = wpa_driver_nl80211_get_capa,
4384         .set_operstate = wpa_driver_nl80211_set_operstate,
4385         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4386         .set_country = wpa_driver_nl80211_set_country,
4387         .set_beacon = wpa_driver_nl80211_set_beacon,
4388         .if_add = wpa_driver_nl80211_if_add,
4389         .if_remove = wpa_driver_nl80211_if_remove,
4390         .send_mlme = wpa_driver_nl80211_send_mlme,
4391         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4392         .sta_add = wpa_driver_nl80211_sta_add,
4393         .sta_remove = wpa_driver_nl80211_sta_remove,
4394         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4395         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4396 #ifdef HOSTAPD
4397         .hapd_init = i802_init,
4398         .hapd_deinit = i802_deinit,
4399         .get_seqnum = i802_get_seqnum,
4400         .flush = i802_flush,
4401         .read_sta_data = i802_read_sta_data,
4402         .sta_deauth = i802_sta_deauth,
4403         .sta_disassoc = i802_sta_disassoc,
4404         .get_inact_sec = i802_get_inact_sec,
4405         .sta_clear_stats = i802_sta_clear_stats,
4406         .set_freq = i802_set_freq,
4407         .set_rts = i802_set_rts,
4408         .set_frag = i802_set_frag,
4409         .set_rate_sets = i802_set_rate_sets,
4410         .set_cts_protect = i802_set_cts_protect,
4411         .set_preamble = i802_set_preamble,
4412         .set_short_slot_time = i802_set_short_slot_time,
4413         .set_tx_queue_params = i802_set_tx_queue_params,
4414         .set_sta_vlan = i802_set_sta_vlan,
4415         .set_wds_sta = i802_set_wds_sta,
4416 #endif /* HOSTAPD */
4417 };