www.project-moonshot.org Git - mech_eap.orig/blob - src/drivers/driver_nl80211.c

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