src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if_arp.h>
  22 #include <net/if.h>
  23 #include <netlink/genl/genl.h>
  24 #include <netlink/genl/family.h>
  25 #include <netlink/genl/ctrl.h>
  26 #include <netpacket/packet.h>
  27 #include <linux/filter.h>
  28 #include "nl80211_copy.h"
  29
  30 #include "common.h"
  31 #include "eloop.h"
  32 #include "common/ieee802_11_defs.h"
  33 #include "netlink.h"
  34 #include "radiotap.h"
  35 #include "radiotap_iter.h"
  36 #include "driver.h"
  37
  38 #ifdef CONFIG_LIBNL20
  39 /* libnl 2.0 compatibility code */
  40 #define nl_handle nl_sock
  41 #define nl_handle_alloc_cb nl_socket_alloc_cb
  42 #define nl_handle_destroy nl_socket_free
  43 #endif /* CONFIG_LIBNL20 */
  44
  45
  46 #ifndef IFF_LOWER_UP
  47 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  48 #endif
  49 #ifndef IFF_DORMANT
  50 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  51 #endif
  52
  53 #ifndef IF_OPER_DORMANT
  54 #define IF_OPER_DORMANT 5
  55 #endif
  56 #ifndef IF_OPER_UP
  57 #define IF_OPER_UP 6
  58 #endif
  59
  60 struct i802_bss {
  61         struct i802_bss *next;
  62         int ifindex;
  63         unsigned int beacon_set:1;
  64 };
  65
  66 struct wpa_driver_nl80211_data {
  67         void *ctx;
  68         struct netlink_data *netlink;
  69         int ioctl_sock; /* socket for ioctl() use */
  70         char ifname[IFNAMSIZ + 1];
  71         int ifindex;
  72         int if_removed;
  73         struct wpa_driver_capa capa;
  74         int has_capability;
  75
  76         int operstate;
  77
  78         int scan_complete_events;
  79
  80         struct nl_handle *nl_handle;
  81         struct nl_handle *nl_handle_event;
  82         struct nl_cache *nl_cache;
  83         struct nl_cache *nl_cache_event;
  84         struct nl_cb *nl_cb;
  85         struct genl_family *nl80211;
  86
  87         u8 auth_bssid[ETH_ALEN];
  88         u8 bssid[ETH_ALEN];
  89         int associated;
  90         u8 ssid[32];
  91         size_t ssid_len;
  92         int nlmode;
  93         int ap_scan_as_station;
  94
  95         int monitor_sock;
  96         int monitor_ifidx;
  97
  98         unsigned int beacon_set:1;
  99
 100 #ifdef HOSTAPD
 101         int eapol_sock; /* socket for EAPOL frames */
 102
 103         int default_if_indices[16];
 104         int *if_indices;
 105         int num_if_indices;
 106
 107         struct i802_bss bss;
 108
 109         int last_freq;
 110         int last_freq_ht;
 111 #endif /* HOSTAPD */
 112 };
 113
 114
 115 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 116                                             void *timeout_ctx);
 117 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 118 static int
 119 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 120 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 121                                    const u8 *addr, int cmd, u16 reason_code);
 122 static void nl80211_remove_monitor_interface(
 123         struct wpa_driver_nl80211_data *drv);
 124
 125 #ifdef HOSTAPD
 126 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 127 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 128 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 129                                  int ifindex);
 130 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 131 #endif /* HOSTAPD */
 132
 133
 134 /* nl80211 code */
 135 static int ack_handler(struct nl_msg *msg, void *arg)
 136 {
 137         int *err = arg;
 138         *err = 0;
 139         return NL_STOP;
 140 }
 141
 142 static int finish_handler(struct nl_msg *msg, void *arg)
 143 {
 144         int *ret = arg;
 145         *ret = 0;
 146         return NL_SKIP;
 147 }
 148
 149 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 150                          void *arg)
 151 {
 152         int *ret = arg;
 153         *ret = err->error;
 154         return NL_SKIP;
 155 }
 156
 157
 158 static int no_seq_check(struct nl_msg *msg, void *arg)
 159 {
 160         return NL_OK;
 161 }
 162
 163
 164 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 165                               struct nl_msg *msg,
 166                               int (*valid_handler)(struct nl_msg *, void *),
 167                               void *valid_data)
 168 {
 169         struct nl_cb *cb;
 170         int err = -ENOMEM;
 171
 172         cb = nl_cb_clone(drv->nl_cb);
 173         if (!cb)
 174                 goto out;
 175
 176         err = nl_send_auto_complete(drv->nl_handle, msg);
 177         if (err < 0)
 178                 goto out;
 179
 180         err = 1;
 181
 182         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 183         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 184         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 185
 186         if (valid_handler)
 187                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 188                           valid_handler, valid_data);
 189
 190         while (err > 0)
 191                 nl_recvmsgs(drv->nl_handle, cb);
 192  out:
 193         nl_cb_put(cb);
 194         nlmsg_free(msg);
 195         return err;
 196 }
 197
 198
 199 struct family_data {
 200         const char *group;
 201         int id;
 202 };
 203
 204
 205 static int family_handler(struct nl_msg *msg, void *arg)
 206 {
 207         struct family_data *res = arg;
 208         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 209         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 210         struct nlattr *mcgrp;
 211         int i;
 212
 213         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 214                   genlmsg_attrlen(gnlh, 0), NULL);
 215         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 216                 return NL_SKIP;
 217
 218         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 219                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 220                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 221                           nla_len(mcgrp), NULL);
 222                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 223                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 224                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 225                                res->group,
 226                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 227                         continue;
 228                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 229                 break;
 230         };
 231
 232         return NL_SKIP;
 233 }
 234
 235
 236 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 237                                const char *family, const char *group)
 238 {
 239         struct nl_msg *msg;
 240         int ret = -1;
 241         struct family_data res = { group, -ENOENT };
 242
 243         msg = nlmsg_alloc();
 244         if (!msg)
 245                 return -ENOMEM;
 246         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 247                     0, 0, CTRL_CMD_GETFAMILY, 0);
 248         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 249
 250         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 251         msg = NULL;
 252         if (ret == 0)
 253                 ret = res.id;
 254
 255 nla_put_failure:
 256         nlmsg_free(msg);
 257         return ret;
 258 }
 259
 260
 261 #ifdef HOSTAPD
 262 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 263                         const char *ifname, u8 *addr)
 264 {
 265         struct ifreq ifr;
 266
 267         os_memset(&ifr, 0, sizeof(ifr));
 268         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 269         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 270                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 271                            ifname, errno, strerror(errno));
 272                 return -1;
 273         }
 274
 275         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 276                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 277                            ifname, ifr.ifr_hwaddr.sa_family);
 278                 return -1;
 279         }
 280         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 281
 282         return 0;
 283 }
 284
 285
 286 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 287                         const char *ifname, const u8 *addr)
 288 {
 289         struct ifreq ifr;
 290
 291         os_memset(&ifr, 0, sizeof(ifr));
 292         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 293         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 294         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 295
 296         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 297                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 298                            ifname, errno, strerror(errno));
 299                 return -1;
 300         }
 301
 302         return 0;
 303 }
 304 #endif /* HOSTAPD */
 305
 306
 307 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 308 {
 309         struct wpa_driver_nl80211_data *drv = priv;
 310         if (!drv->associated)
 311                 return -1;
 312         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 313         return 0;
 314 }
 315
 316
 317 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 318 {
 319         struct wpa_driver_nl80211_data *drv = priv;
 320         if (!drv->associated)
 321                 return -1;
 322         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 323         return drv->ssid_len;
 324 }
 325
 326
 327 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 328                                           char *buf, size_t len, int del)
 329 {
 330         union wpa_event_data event;
 331
 332         os_memset(&event, 0, sizeof(event));
 333         if (len > sizeof(event.interface_status.ifname))
 334                 len = sizeof(event.interface_status.ifname) - 1;
 335         os_memcpy(event.interface_status.ifname, buf, len);
 336         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 337                 EVENT_INTERFACE_ADDED;
 338
 339         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 340                    del ? "DEL" : "NEW",
 341                    event.interface_status.ifname,
 342                    del ? "removed" : "added");
 343
 344         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 345                 if (del)
 346                         drv->if_removed = 1;
 347                 else
 348                         drv->if_removed = 0;
 349         }
 350
 351         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 352 }
 353
 354
 355 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 356                                          struct nlmsghdr *h)
 357 {
 358         struct ifinfomsg *ifi;
 359         int attrlen, _nlmsg_len, rta_len;
 360         struct rtattr *attr;
 361
 362         ifi = NLMSG_DATA(h);
 363
 364         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 365
 366         attrlen = NLMSG_PAYLOAD(h, sizeof(struct ifinfomsg));
 367         if (attrlen < 0)
 368                 return 0;
 369
 370         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 371
 372         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 373         while (RTA_OK(attr, attrlen)) {
 374                 if (attr->rta_type == IFLA_IFNAME) {
 375                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 376                             == 0)
 377                                 return 1;
 378                         else
 379                                 break;
 380                 }
 381                 attr = RTA_NEXT(attr, attrlen);
 382         }
 383
 384         return 0;
 385 }
 386
 387
 388 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 389                                           int ifindex, struct nlmsghdr *h)
 390 {
 391         if (drv->ifindex == ifindex)
 392                 return 1;
 393
 394         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 395                 drv->ifindex = if_nametoindex(drv->ifname);
 396                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 397                            "interface");
 398                 wpa_driver_nl80211_finish_drv_init(drv);
 399                 return 1;
 400         }
 401
 402         return 0;
 403 }
 404
 405
 406 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx, struct nlmsghdr *h,
 407                                                  size_t len)
 408 {
 409         struct wpa_driver_nl80211_data *drv = ctx;
 410         struct ifinfomsg *ifi;
 411         int attrlen, _nlmsg_len, rta_len;
 412         struct rtattr * attr;
 413
 414         if (len < sizeof(*ifi))
 415                 return;
 416
 417         ifi = NLMSG_DATA(h);
 418
 419         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 420                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 421                            ifi->ifi_index);
 422                 return;
 423         }
 424
 425         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 426                    "(%s%s%s%s)",
 427                    drv->operstate, ifi->ifi_flags,
 428                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 429                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 430                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 431                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 432         /*
 433          * Some drivers send the association event before the operup event--in
 434          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 435          * fails. This will hit us when wpa_supplicant does not need to do
 436          * IEEE 802.1X authentication
 437          */
 438         if (drv->operstate == 1 &&
 439             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 440             !(ifi->ifi_flags & IFF_RUNNING))
 441                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 442                                        -1, IF_OPER_UP);
 443
 444         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 445
 446         attrlen = NLMSG_PAYLOAD(h, sizeof(struct ifinfomsg));
 447         if (attrlen < 0)
 448                 return;
 449
 450         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 451
 452         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 453         while (RTA_OK(attr, attrlen)) {
 454                 if (attr->rta_type == IFLA_IFNAME) {
 455                         wpa_driver_nl80211_event_link(
 456                                 drv,
 457                                 ((char *) attr) + rta_len,
 458                                 attr->rta_len - rta_len, 0);
 459                 }
 460                 attr = RTA_NEXT(attr, attrlen);
 461         }
 462 }
 463
 464
 465 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx, struct nlmsghdr *h,
 466                                                  size_t len)
 467 {
 468         struct wpa_driver_nl80211_data *drv = ctx;
 469         struct ifinfomsg *ifi;
 470         int attrlen, _nlmsg_len, rta_len;
 471         struct rtattr * attr;
 472
 473         if (len < sizeof(*ifi))
 474                 return;
 475
 476         ifi = NLMSG_DATA(h);
 477
 478         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 479
 480         attrlen = NLMSG_PAYLOAD(h, sizeof(struct ifinfomsg));
 481         if (attrlen < 0)
 482                 return;
 483
 484         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 485
 486         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 487         while (RTA_OK(attr, attrlen)) {
 488                 if (attr->rta_type == IFLA_IFNAME) {
 489                         wpa_driver_nl80211_event_link(
 490                                 drv,
 491                                 ((char *) attr) + rta_len,
 492                                 attr->rta_len - rta_len, 1);
 493                 }
 494                 attr = RTA_NEXT(attr, attrlen);
 495         }
 496 }
 497
 498
 499 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 500                             const u8 *frame, size_t len)
 501 {
 502         const struct ieee80211_mgmt *mgmt;
 503         union wpa_event_data event;
 504
 505         mgmt = (const struct ieee80211_mgmt *) frame;
 506         if (len < 24 + sizeof(mgmt->u.auth)) {
 507                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 508                            "frame");
 509                 return;
 510         }
 511
 512         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 513         os_memset(&event, 0, sizeof(event));
 514         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 515         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 516         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 517         if (len > 24 + sizeof(mgmt->u.auth)) {
 518                 event.auth.ies = mgmt->u.auth.variable;
 519                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 520         }
 521
 522         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 523 }
 524
 525
 526 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 527                             const u8 *frame, size_t len)
 528 {
 529         const struct ieee80211_mgmt *mgmt;
 530         union wpa_event_data event;
 531         u16 status;
 532
 533         mgmt = (const struct ieee80211_mgmt *) frame;
 534         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 535                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 536                            "frame");
 537                 return;
 538         }
 539
 540         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 541         if (status != WLAN_STATUS_SUCCESS) {
 542                 os_memset(&event, 0, sizeof(event));
 543                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 544                         event.assoc_reject.resp_ies =
 545                                 (u8 *) mgmt->u.assoc_resp.variable;
 546                         event.assoc_reject.resp_ies_len =
 547                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 548                 }
 549                 event.assoc_reject.status_code = status;
 550
 551                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 552                 return;
 553         }
 554
 555         drv->associated = 1;
 556         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 557
 558         os_memset(&event, 0, sizeof(event));
 559         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 560                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 561                 event.assoc_info.resp_ies_len =
 562                         len - 24 - sizeof(mgmt->u.assoc_resp);
 563         }
 564
 565         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 566 }
 567
 568
 569 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 570                                enum nl80211_commands cmd, struct nlattr *status,
 571                                struct nlattr *addr, struct nlattr *req_ie,
 572                                struct nlattr *resp_ie)
 573 {
 574         union wpa_event_data event;
 575
 576         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 577                 /*
 578                  * Avoid reporting two association events that would confuse
 579                  * the core code.
 580                  */
 581                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 582                            "when using userspace SME", cmd);
 583                 return;
 584         }
 585
 586         os_memset(&event, 0, sizeof(event));
 587         if (cmd == NL80211_CMD_CONNECT &&
 588             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 589                 if (resp_ie) {
 590                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 591                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 592                 }
 593                 event.assoc_reject.status_code = nla_get_u16(status);
 594                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 595                 return;
 596         }
 597
 598         drv->associated = 1;
 599         if (addr)
 600                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 601
 602         if (req_ie) {
 603                 event.assoc_info.req_ies = nla_data(req_ie);
 604                 event.assoc_info.req_ies_len = nla_len(req_ie);
 605         }
 606         if (resp_ie) {
 607                 event.assoc_info.resp_ies = nla_data(resp_ie);
 608                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 609         }
 610
 611         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 612 }
 613
 614
 615 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 616                                enum nl80211_commands cmd, struct nlattr *addr)
 617 {
 618         union wpa_event_data event;
 619         enum wpa_event_type ev;
 620
 621         if (nla_len(addr) != ETH_ALEN)
 622                 return;
 623
 624         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 625                    cmd, MAC2STR((u8 *) nla_data(addr)));
 626
 627         if (cmd == NL80211_CMD_AUTHENTICATE)
 628                 ev = EVENT_AUTH_TIMED_OUT;
 629         else if (cmd == NL80211_CMD_ASSOCIATE)
 630                 ev = EVENT_ASSOC_TIMED_OUT;
 631         else
 632                 return;
 633
 634         os_memset(&event, 0, sizeof(event));
 635         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 636         wpa_supplicant_event(drv->ctx, ev, &event);
 637 }
 638
 639
 640 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 641                        enum nl80211_commands cmd, struct nlattr *frame,
 642                        struct nlattr *addr, struct nlattr *timed_out)
 643 {
 644         if (timed_out && addr) {
 645                 mlme_timeout_event(drv, cmd, addr);
 646                 return;
 647         }
 648
 649         if (frame == NULL) {
 650                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 651                            "data", cmd);
 652                 return;
 653         }
 654
 655         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 656         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 657                     nla_data(frame), nla_len(frame));
 658
 659         switch (cmd) {
 660         case NL80211_CMD_AUTHENTICATE:
 661                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 662                 break;
 663         case NL80211_CMD_ASSOCIATE:
 664                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 665                 break;
 666         case NL80211_CMD_DEAUTHENTICATE:
 667                 drv->associated = 0;
 668                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 669                 break;
 670         case NL80211_CMD_DISASSOCIATE:
 671                 drv->associated = 0;
 672                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 673                 break;
 674         default:
 675                 break;
 676         }
 677 }
 678
 679
 680 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 681                                            struct nlattr *tb[])
 682 {
 683         union wpa_event_data data;
 684
 685         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 686         os_memset(&data, 0, sizeof(data));
 687         if (tb[NL80211_ATTR_MAC]) {
 688                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 689                             nla_data(tb[NL80211_ATTR_MAC]),
 690                             nla_len(tb[NL80211_ATTR_MAC]));
 691                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 692         }
 693         if (tb[NL80211_ATTR_KEY_SEQ]) {
 694                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 695                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 696                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 697         }
 698         if (tb[NL80211_ATTR_KEY_TYPE]) {
 699                 enum nl80211_key_type key_type =
 700                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 701                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 702                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 703                         data.michael_mic_failure.unicast = 1;
 704         } else
 705                 data.michael_mic_failure.unicast = 1;
 706
 707         if (tb[NL80211_ATTR_KEY_IDX]) {
 708                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 709                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 710         }
 711
 712         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 713 }
 714
 715
 716 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 717                                  struct nlattr *tb[])
 718 {
 719         if (tb[NL80211_ATTR_MAC] == NULL) {
 720                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 721                            "event");
 722                 return;
 723         }
 724         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 725         drv->associated = 1;
 726         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 727                    MAC2STR(drv->bssid));
 728
 729         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 730 }
 731
 732
 733 static int process_event(struct nl_msg *msg, void *arg)
 734 {
 735         struct wpa_driver_nl80211_data *drv = arg;
 736         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 737         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 738
 739         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 740                   genlmsg_attrlen(gnlh, 0), NULL);
 741
 742         if (tb[NL80211_ATTR_IFINDEX]) {
 743                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 744                 if (ifindex != drv->ifindex) {
 745                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 746                                    " for foreign interface (ifindex %d)",
 747                                    gnlh->cmd, ifindex);
 748                         return NL_SKIP;
 749                 }
 750         }
 751
 752         if (drv->ap_scan_as_station &&
 753             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 754              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 755                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 756                 drv->ap_scan_as_station = 0;
 757         }
 758
 759         switch (gnlh->cmd) {
 760         case NL80211_CMD_TRIGGER_SCAN:
 761                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 762                 break;
 763         case NL80211_CMD_NEW_SCAN_RESULTS:
 764                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 765                 drv->scan_complete_events = 1;
 766                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 767                                      drv->ctx);
 768                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 769                 break;
 770         case NL80211_CMD_SCAN_ABORTED:
 771                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 772                 /*
 773                  * Need to indicate that scan results are available in order
 774                  * not to make wpa_supplicant stop its scanning.
 775                  */
 776                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 777                                      drv->ctx);
 778                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 779                 break;
 780         case NL80211_CMD_AUTHENTICATE:
 781         case NL80211_CMD_ASSOCIATE:
 782         case NL80211_CMD_DEAUTHENTICATE:
 783         case NL80211_CMD_DISASSOCIATE:
 784                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 785                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
 786                 break;
 787         case NL80211_CMD_CONNECT:
 788         case NL80211_CMD_ROAM:
 789                 mlme_event_connect(drv, gnlh->cmd,
 790                                    tb[NL80211_ATTR_STATUS_CODE],
 791                                    tb[NL80211_ATTR_MAC],
 792                                    tb[NL80211_ATTR_REQ_IE],
 793                                    tb[NL80211_ATTR_RESP_IE]);
 794                 break;
 795         case NL80211_CMD_DISCONNECT:
 796                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 797                         /*
 798                          * Avoid reporting two disassociation events that could
 799                          * confuse the core code.
 800                          */
 801                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 802                                    "event when using userspace SME");
 803                         break;
 804                 }
 805                 drv->associated = 0;
 806                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 807                 break;
 808         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 809                 mlme_event_michael_mic_failure(drv, tb);
 810                 break;
 811         case NL80211_CMD_JOIN_IBSS:
 812                 mlme_event_join_ibss(drv, tb);
 813                 break;
 814         default:
 815                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 816                            "(cmd=%d)", gnlh->cmd);
 817                 break;
 818         }
 819
 820         return NL_SKIP;
 821 }
 822
 823
 824 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 825                                              void *sock_ctx)
 826 {
 827         struct nl_cb *cb;
 828         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 829
 830         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 831
 832         cb = nl_cb_clone(drv->nl_cb);
 833         if (!cb)
 834                 return;
 835         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 836         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 837         nl_recvmsgs(drv->nl_handle_event, cb);
 838         nl_cb_put(cb);
 839 }
 840
 841
 842 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 843                                    const char *ifname, int dev_up)
 844 {
 845         struct ifreq ifr;
 846
 847         if (drv->ioctl_sock < 0)
 848                 return -1;
 849
 850         os_memset(&ifr, 0, sizeof(ifr));
 851         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 852
 853         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 854                 perror("ioctl[SIOCGIFFLAGS]");
 855                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 856                            ifname);
 857                 return -1;
 858         }
 859
 860         if (dev_up) {
 861                 if (ifr.ifr_flags & IFF_UP)
 862                         return 0;
 863                 ifr.ifr_flags |= IFF_UP;
 864         } else {
 865                 if (!(ifr.ifr_flags & IFF_UP))
 866                         return 0;
 867                 ifr.ifr_flags &= ~IFF_UP;
 868         }
 869
 870         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 871                 perror("ioctl[SIOCSIFFLAGS]");
 872                 return -1;
 873         }
 874
 875         return 0;
 876 }
 877
 878
 879 /**
 880  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 881  * @priv: driver_nl80211 private data
 882  * @alpha2_arg: country to which to switch to
 883  * Returns: 0 on success, -1 on failure
 884  *
 885  * This asks nl80211 to set the regulatory domain for given
 886  * country ISO / IEC alpha2.
 887  */
 888 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 889 {
 890         struct wpa_driver_nl80211_data *drv = priv;
 891         char alpha2[3];
 892         struct nl_msg *msg;
 893
 894         msg = nlmsg_alloc();
 895         if (!msg)
 896                 return -ENOMEM;
 897
 898         alpha2[0] = alpha2_arg[0];
 899         alpha2[1] = alpha2_arg[1];
 900         alpha2[2] = '\0';
 901
 902         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 903                     0, NL80211_CMD_REQ_SET_REG, 0);
 904
 905         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 906         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 907                 return -EINVAL;
 908         return 0;
 909 nla_put_failure:
 910         return -EINVAL;
 911 }
 912
 913
 914 #ifndef HOSTAPD
 915 struct wiphy_info_data {
 916         int max_scan_ssids;
 917         int ap_supported;
 918         int auth_supported;
 919         int connect_supported;
 920 };
 921
 922
 923 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 924 {
 925         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 926         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 927         struct wiphy_info_data *info = arg;
 928
 929         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 930                   genlmsg_attrlen(gnlh, 0), NULL);
 931
 932         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 933                 info->max_scan_ssids =
 934                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 935
 936         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 937                 struct nlattr *nl_mode;
 938                 int i;
 939                 nla_for_each_nested(nl_mode,
 940                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 941                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 942                                 info->ap_supported = 1;
 943                                 break;
 944                         }
 945                 }
 946         }
 947
 948         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
 949                 struct nlattr *nl_cmd;
 950                 int i;
 951
 952                 nla_for_each_nested(nl_cmd,
 953                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
 954                         u32 cmd = nla_get_u32(nl_cmd);
 955                         if (cmd == NL80211_CMD_AUTHENTICATE)
 956                                 info->auth_supported = 1;
 957                         else if (cmd == NL80211_CMD_CONNECT)
 958                                 info->connect_supported = 1;
 959                 }
 960         }
 961
 962         return NL_SKIP;
 963 }
 964
 965
 966 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 967                                        struct wiphy_info_data *info)
 968 {
 969         struct nl_msg *msg;
 970
 971         os_memset(info, 0, sizeof(*info));
 972         msg = nlmsg_alloc();
 973         if (!msg)
 974                 return -1;
 975
 976         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 977                     0, NL80211_CMD_GET_WIPHY, 0);
 978
 979         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 980
 981         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
 982                 return 0;
 983         msg = NULL;
 984 nla_put_failure:
 985         nlmsg_free(msg);
 986         return -1;
 987 }
 988
 989
 990 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
 991 {
 992         struct wiphy_info_data info;
 993         if (wpa_driver_nl80211_get_info(drv, &info))
 994                 return -1;
 995         drv->has_capability = 1;
 996         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
 997         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
 998                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
 999                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1000                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1001         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1002                 WPA_DRIVER_CAPA_ENC_WEP104 |
1003                 WPA_DRIVER_CAPA_ENC_TKIP |
1004                 WPA_DRIVER_CAPA_ENC_CCMP;
1005
1006         drv->capa.max_scan_ssids = info.max_scan_ssids;
1007         if (info.ap_supported)
1008                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1009
1010         if (info.auth_supported)
1011                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1012         else if (!info.connect_supported) {
1013                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1014                            "authentication/association or connect commands");
1015                 return -1;
1016         }
1017
1018         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1019
1020         return 0;
1021 }
1022 #endif /* HOSTAPD */
1023
1024
1025 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1026                                       void *ctx)
1027 {
1028         int ret;
1029
1030         /* Initialize generic netlink and nl80211 */
1031
1032         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1033         if (drv->nl_cb == NULL) {
1034                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1035                            "callbacks");
1036                 goto err1;
1037         }
1038
1039         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1040         if (drv->nl_handle == NULL) {
1041                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1042                            "callbacks");
1043                 goto err2;
1044         }
1045
1046         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1047         if (drv->nl_handle_event == NULL) {
1048                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1049                            "callbacks (event)");
1050                 goto err2b;
1051         }
1052
1053         if (genl_connect(drv->nl_handle)) {
1054                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1055                            "netlink");
1056                 goto err3;
1057         }
1058
1059         if (genl_connect(drv->nl_handle_event)) {
1060                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1061                            "netlink (event)");
1062                 goto err3;
1063         }
1064
1065 #ifdef CONFIG_LIBNL20
1066         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1067                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1068                            "netlink cache");
1069                 goto err3;
1070         }
1071         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1072             0) {
1073                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1074                            "netlink cache (event)");
1075                 goto err3b;
1076         }
1077 #else /* CONFIG_LIBNL20 */
1078         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1079         if (drv->nl_cache == NULL) {
1080                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1081                            "netlink cache");
1082                 goto err3;
1083         }
1084         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1085         if (drv->nl_cache_event == NULL) {
1086                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1087                            "netlink cache (event)");
1088                 goto err3b;
1089         }
1090 #endif /* CONFIG_LIBNL20 */
1091
1092         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1093         if (drv->nl80211 == NULL) {
1094                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1095                            "found");
1096                 goto err4;
1097         }
1098
1099         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1100         if (ret >= 0)
1101                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1102         if (ret < 0) {
1103                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1104                            "membership for scan events: %d (%s)",
1105                            ret, strerror(-ret));
1106                 goto err4;
1107         }
1108
1109         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1110         if (ret >= 0)
1111                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1112         if (ret < 0) {
1113                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1114                            "membership for mlme events: %d (%s)",
1115                            ret, strerror(-ret));
1116                 goto err4;
1117         }
1118
1119         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1120                                  wpa_driver_nl80211_event_receive, drv, ctx);
1121
1122         return 0;
1123
1124 err4:
1125         nl_cache_free(drv->nl_cache_event);
1126 err3b:
1127         nl_cache_free(drv->nl_cache);
1128 err3:
1129         nl_handle_destroy(drv->nl_handle_event);
1130 err2b:
1131         nl_handle_destroy(drv->nl_handle);
1132 err2:
1133         nl_cb_put(drv->nl_cb);
1134 err1:
1135         return -1;
1136 }
1137
1138
1139 /**
1140  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1141  * @ctx: context to be used when calling wpa_supplicant functions,
1142  * e.g., wpa_supplicant_event()
1143  * @ifname: interface name, e.g., wlan0
1144  * Returns: Pointer to private data, %NULL on failure
1145  */
1146 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1147 {
1148         struct wpa_driver_nl80211_data *drv;
1149         struct netlink_config *cfg;
1150
1151         drv = os_zalloc(sizeof(*drv));
1152         if (drv == NULL)
1153                 return NULL;
1154         drv->ctx = ctx;
1155         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1156         drv->monitor_ifidx = -1;
1157         drv->monitor_sock = -1;
1158         drv->ioctl_sock = -1;
1159
1160         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1161                 os_free(drv);
1162                 return NULL;
1163         }
1164
1165         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1166         if (drv->ioctl_sock < 0) {
1167                 perror("socket(PF_INET,SOCK_DGRAM)");
1168                 goto failed;
1169         }
1170
1171         cfg = os_zalloc(sizeof(*cfg));
1172         if (cfg == NULL)
1173                 goto failed;
1174         cfg->ctx = drv;
1175         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1176         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1177         drv->netlink = netlink_init(cfg);
1178         if (drv->netlink == NULL) {
1179                 os_free(cfg);
1180                 goto failed;
1181         }
1182         if (wpa_driver_nl80211_finish_drv_init(drv))
1183                 goto failed;
1184
1185         return drv;
1186
1187 failed:
1188         netlink_deinit(drv->netlink);
1189         if (drv->ioctl_sock >= 0)
1190                 close(drv->ioctl_sock);
1191
1192         genl_family_put(drv->nl80211);
1193         nl_cache_free(drv->nl_cache);
1194         nl_handle_destroy(drv->nl_handle);
1195         nl_cb_put(drv->nl_cb);
1196
1197         os_free(drv);
1198         return NULL;
1199 }
1200
1201
1202 static int
1203 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1204 {
1205         drv->ifindex = if_nametoindex(drv->ifname);
1206
1207 #ifndef HOSTAPD
1208         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1209                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1210                            "use managed mode");
1211         }
1212
1213         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1214                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1215                            "UP", drv->ifname);
1216                 return -1;
1217         }
1218
1219         if (wpa_driver_nl80211_capa(drv))
1220                 return -1;
1221
1222         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1223                                1, IF_OPER_DORMANT);
1224 #endif /* HOSTAPD */
1225
1226         return 0;
1227 }
1228
1229
1230 #ifdef HOSTAPD
1231 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1232 {
1233         struct i802_bss *bss, *prev;
1234         bss = drv->bss.next;
1235         while (bss) {
1236                 prev = bss;
1237                 bss = bss->next;
1238                 os_free(bss);
1239         }
1240 }
1241 #endif /* HOSTAPD */
1242
1243
1244 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1245 {
1246         struct nl_msg *msg;
1247
1248         msg = nlmsg_alloc();
1249         if (!msg)
1250                 return -ENOMEM;
1251
1252         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1253                     0, NL80211_CMD_DEL_BEACON, 0);
1254         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1255
1256         return send_and_recv_msgs(drv, msg, NULL, NULL);
1257  nla_put_failure:
1258         return -ENOBUFS;
1259 }
1260
1261
1262 /**
1263  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1264  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1265  *
1266  * Shut down driver interface and processing of driver events. Free
1267  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1268  */
1269 static void wpa_driver_nl80211_deinit(void *priv)
1270 {
1271         struct wpa_driver_nl80211_data *drv = priv;
1272
1273         nl80211_remove_monitor_interface(drv);
1274         if (drv->monitor_sock >= 0) {
1275                 eloop_unregister_read_sock(drv->monitor_sock);
1276                 close(drv->monitor_sock);
1277         }
1278
1279         if (drv->nlmode == NL80211_IFTYPE_AP)
1280                 wpa_driver_nl80211_del_beacon(drv);
1281
1282 #ifdef HOSTAPD
1283         if (drv->last_freq_ht) {
1284                 /* Clear HT flags from the driver */
1285                 struct hostapd_freq_params freq;
1286                 os_memset(&freq, 0, sizeof(freq));
1287                 freq.freq = drv->last_freq;
1288                 i802_set_freq(priv, &freq);
1289         }
1290
1291         if (drv->eapol_sock >= 0) {
1292                 eloop_unregister_read_sock(drv->eapol_sock);
1293                 close(drv->eapol_sock);
1294         }
1295
1296         if (drv->if_indices != drv->default_if_indices)
1297                 os_free(drv->if_indices);
1298
1299         wpa_driver_nl80211_free_bss(drv);
1300 #endif /* HOSTAPD */
1301
1302         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1303         netlink_deinit(drv->netlink);
1304
1305         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1306
1307         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1308         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1309
1310         if (drv->ioctl_sock >= 0)
1311                 close(drv->ioctl_sock);
1312
1313         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1314         genl_family_put(drv->nl80211);
1315         nl_cache_free(drv->nl_cache);
1316         nl_cache_free(drv->nl_cache_event);
1317         nl_handle_destroy(drv->nl_handle);
1318         nl_handle_destroy(drv->nl_handle_event);
1319         nl_cb_put(drv->nl_cb);
1320
1321         os_free(drv);
1322 }
1323
1324
1325 /**
1326  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1327  * @eloop_ctx: Driver private data
1328  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1329  *
1330  * This function can be used as registered timeout when starting a scan to
1331  * generate a scan completed event if the driver does not report this.
1332  */
1333 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1334 {
1335         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1336         if (drv->ap_scan_as_station) {
1337                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1338                 drv->ap_scan_as_station = 0;
1339         }
1340         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1341         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1342 }
1343
1344
1345 /**
1346  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1347  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1348  * @params: Scan parameters
1349  * Returns: 0 on success, -1 on failure
1350  */
1351 static int wpa_driver_nl80211_scan(void *priv,
1352                                    struct wpa_driver_scan_params *params)
1353 {
1354         struct wpa_driver_nl80211_data *drv = priv;
1355         int ret = 0, timeout;
1356         struct nl_msg *msg, *ssids, *freqs;
1357         size_t i;
1358
1359         msg = nlmsg_alloc();
1360         ssids = nlmsg_alloc();
1361         freqs = nlmsg_alloc();
1362         if (!msg || !ssids || !freqs) {
1363                 nlmsg_free(msg);
1364                 nlmsg_free(ssids);
1365                 nlmsg_free(freqs);
1366                 return -1;
1367         }
1368
1369         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1370                     NL80211_CMD_TRIGGER_SCAN, 0);
1371
1372         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1373
1374         for (i = 0; i < params->num_ssids; i++) {
1375                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1376                         params->ssids[i].ssid);
1377         }
1378         if (params->num_ssids)
1379                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1380
1381         if (params->extra_ies) {
1382                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1383                         params->extra_ies);
1384         }
1385
1386         if (params->freqs) {
1387                 for (i = 0; params->freqs[i]; i++)
1388                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1389                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1390         }
1391
1392         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1393         msg = NULL;
1394         if (ret) {
1395                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1396                            "(%s)", ret, strerror(-ret));
1397 #ifdef HOSTAPD
1398                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1399                         /*
1400                          * mac80211 does not allow scan requests in AP mode, so
1401                          * try to do this in station mode.
1402                          */
1403                         if (wpa_driver_nl80211_set_mode(drv,
1404                                                         IEEE80211_MODE_INFRA))
1405                                 goto nla_put_failure;
1406
1407                         if (wpa_driver_nl80211_scan(drv, params)) {
1408                                 wpa_driver_nl80211_set_mode(drv,
1409                                                             IEEE80211_MODE_AP);
1410                                 goto nla_put_failure;
1411                         }
1412
1413                         /* Restore AP mode when processing scan results */
1414                         drv->ap_scan_as_station = 1;
1415                         ret = 0;
1416                 } else
1417                         goto nla_put_failure;
1418 #else /* HOSTAPD */
1419                 goto nla_put_failure;
1420 #endif /* HOSTAPD */
1421         }
1422
1423         /* Not all drivers generate "scan completed" wireless event, so try to
1424          * read results after a timeout. */
1425         timeout = 10;
1426         if (drv->scan_complete_events) {
1427                 /*
1428                  * The driver seems to deliver events to notify when scan is
1429                  * complete, so use longer timeout to avoid race conditions
1430                  * with scanning and following association request.
1431                  */
1432                 timeout = 30;
1433         }
1434         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1435                    "seconds", ret, timeout);
1436         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1437         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1438                                drv, drv->ctx);
1439
1440 nla_put_failure:
1441         nlmsg_free(ssids);
1442         nlmsg_free(msg);
1443         nlmsg_free(freqs);
1444         return ret;
1445 }
1446
1447
1448 static int bss_info_handler(struct nl_msg *msg, void *arg)
1449 {
1450         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1451         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1452         struct nlattr *bss[NL80211_BSS_MAX + 1];
1453         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1454                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1455                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1456                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1457                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1458                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1459                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1460                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1461                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1462                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1463                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1464         };
1465         struct wpa_scan_results *res = arg;
1466         struct wpa_scan_res **tmp;
1467         struct wpa_scan_res *r;
1468         const u8 *ie;
1469         size_t ie_len;
1470
1471         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1472                   genlmsg_attrlen(gnlh, 0), NULL);
1473         if (!tb[NL80211_ATTR_BSS])
1474                 return NL_SKIP;
1475         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1476                              bss_policy))
1477                 return NL_SKIP;
1478         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1479                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1480                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1481         } else {
1482                 ie = NULL;
1483                 ie_len = 0;
1484         }
1485
1486         r = os_zalloc(sizeof(*r) + ie_len);
1487         if (r == NULL)
1488                 return NL_SKIP;
1489         if (bss[NL80211_BSS_BSSID])
1490                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1491                           ETH_ALEN);
1492         if (bss[NL80211_BSS_FREQUENCY])
1493                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1494         if (bss[NL80211_BSS_BEACON_INTERVAL])
1495                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1496         if (bss[NL80211_BSS_CAPABILITY])
1497                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1498         r->flags |= WPA_SCAN_NOISE_INVALID;
1499         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1500                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1501                 r->level /= 100; /* mBm to dBm */
1502                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1503         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1504                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1505                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1506         } else
1507                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1508         if (bss[NL80211_BSS_TSF])
1509                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1510         if (bss[NL80211_BSS_SEEN_MS_AGO])
1511                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1512         r->ie_len = ie_len;
1513         if (ie)
1514                 os_memcpy(r + 1, ie, ie_len);
1515
1516         if (bss[NL80211_BSS_STATUS]) {
1517                 enum nl80211_bss_status status;
1518                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1519                 switch (status) {
1520                 case NL80211_BSS_STATUS_AUTHENTICATED:
1521                         r->flags |= WPA_SCAN_AUTHENTICATED;
1522                         break;
1523                 case NL80211_BSS_STATUS_ASSOCIATED:
1524                         r->flags |= WPA_SCAN_ASSOCIATED;
1525                         break;
1526                 default:
1527                         break;
1528                 }
1529         }
1530
1531         tmp = os_realloc(res->res,
1532                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1533         if (tmp == NULL) {
1534                 os_free(r);
1535                 return NL_SKIP;
1536         }
1537         tmp[res->num++] = r;
1538         res->res = tmp;
1539
1540         return NL_SKIP;
1541 }
1542
1543
1544 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1545                                  const u8 *addr)
1546 {
1547         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1548                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1549                            "mismatch");
1550                 wpa_driver_nl80211_mlme(drv, addr,
1551                                         NL80211_CMD_DEAUTHENTICATE,
1552                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1553         }
1554 }
1555
1556
1557 static void wpa_driver_nl80211_check_bss_status(
1558         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1559 {
1560         size_t i;
1561
1562         for (i = 0; i < res->num; i++) {
1563                 struct wpa_scan_res *r = res->res[i];
1564                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1565                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1566                                    "indicates BSS status with " MACSTR
1567                                    " as authenticated",
1568                                    MAC2STR(r->bssid));
1569                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1570                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1571                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1572                             0) {
1573                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1574                                            " in local state (auth=" MACSTR
1575                                            " assoc=" MACSTR ")",
1576                                            MAC2STR(drv->auth_bssid),
1577                                            MAC2STR(drv->bssid));
1578                         }
1579                 }
1580
1581                 if (r->flags & WPA_SCAN_ASSOCIATED) {
1582                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1583                                    "indicate BSS status with " MACSTR
1584                                    " as associated",
1585                                    MAC2STR(r->bssid));
1586                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1587                             !drv->associated) {
1588                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1589                                            "(not associated) does not match "
1590                                            "with BSS state");
1591                                 clear_state_mismatch(drv, r->bssid);
1592                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1593                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1594                                    0) {
1595                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1596                                            "(associated with " MACSTR ") does "
1597                                            "not match with BSS state",
1598                                            MAC2STR(drv->bssid));
1599                                 clear_state_mismatch(drv, r->bssid);
1600                                 clear_state_mismatch(drv, drv->bssid);
1601                         }
1602                 }
1603         }
1604 }
1605
1606
1607 /**
1608  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1609  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1610  * Returns: Scan results on success, -1 on failure
1611  */
1612 static struct wpa_scan_results *
1613 wpa_driver_nl80211_get_scan_results(void *priv)
1614 {
1615         struct wpa_driver_nl80211_data *drv = priv;
1616         struct nl_msg *msg;
1617         struct wpa_scan_results *res;
1618         int ret;
1619
1620         res = os_zalloc(sizeof(*res));
1621         if (res == NULL)
1622                 return NULL;
1623         msg = nlmsg_alloc();
1624         if (!msg)
1625                 goto nla_put_failure;
1626
1627         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1628                     NL80211_CMD_GET_SCAN, 0);
1629         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1630
1631         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1632         msg = NULL;
1633         if (ret == 0) {
1634                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1635                            (unsigned long) res->num);
1636                 wpa_driver_nl80211_check_bss_status(drv, res);
1637                 return res;
1638         }
1639         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1640                    "(%s)", ret, strerror(-ret));
1641 nla_put_failure:
1642         nlmsg_free(msg);
1643         wpa_scan_results_free(res);
1644         return NULL;
1645 }
1646
1647
1648 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1649                                       wpa_alg alg, const u8 *addr, int key_idx,
1650                                       int set_tx,
1651                                       const u8 *seq, size_t seq_len,
1652                                       const u8 *key, size_t key_len)
1653 {
1654         struct wpa_driver_nl80211_data *drv = priv;
1655         int ifindex = if_nametoindex(ifname);
1656         struct nl_msg *msg;
1657         int ret;
1658
1659         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1660                    "set_tx=%d seq_len=%lu key_len=%lu",
1661                    __func__, ifindex, alg, addr, key_idx, set_tx,
1662                    (unsigned long) seq_len, (unsigned long) key_len);
1663
1664         msg = nlmsg_alloc();
1665         if (!msg)
1666                 return -ENOMEM;
1667
1668         if (alg == WPA_ALG_NONE) {
1669                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1670                             0, NL80211_CMD_DEL_KEY, 0);
1671         } else {
1672                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1673                             0, NL80211_CMD_NEW_KEY, 0);
1674                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1675                 switch (alg) {
1676                 case WPA_ALG_WEP:
1677                         if (key_len == 5)
1678                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1679                                             WLAN_CIPHER_SUITE_WEP40);
1680                         else
1681                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1682                                             WLAN_CIPHER_SUITE_WEP104);
1683                         break;
1684                 case WPA_ALG_TKIP:
1685                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1686                                     WLAN_CIPHER_SUITE_TKIP);
1687                         break;
1688                 case WPA_ALG_CCMP:
1689                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1690                                     WLAN_CIPHER_SUITE_CCMP);
1691                         break;
1692                 case WPA_ALG_IGTK:
1693                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1694                                     WLAN_CIPHER_SUITE_AES_CMAC);
1695                         break;
1696                 default:
1697                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1698                                    "algorithm %d", __func__, alg);
1699                         nlmsg_free(msg);
1700                         return -1;
1701                 }
1702         }
1703
1704         if (seq && seq_len)
1705                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1706
1707         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1708         {
1709                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1710                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1711         }
1712         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1713         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1714
1715         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1716         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1717                 ret = 0;
1718         if (ret)
1719                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1720                            ret, strerror(-ret));
1721
1722         /*
1723          * If we failed or don't need to set the default TX key (below),
1724          * we're done here.
1725          */
1726         if (ret || !set_tx || alg == WPA_ALG_NONE)
1727                 return ret;
1728 #ifdef HOSTAPD /* FIX: is this needed? */
1729         if (addr)
1730                 return ret;
1731 #endif /* HOSTAPD */
1732
1733         msg = nlmsg_alloc();
1734         if (!msg)
1735                 return -ENOMEM;
1736
1737         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1738                     0, NL80211_CMD_SET_KEY, 0);
1739         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1740         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1741         if (alg == WPA_ALG_IGTK)
1742                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1743         else
1744                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1745
1746         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1747         if (ret == -ENOENT)
1748                 ret = 0;
1749         if (ret)
1750                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1751                            "err=%d %s)", ret, strerror(-ret));
1752         return ret;
1753
1754 nla_put_failure:
1755         return -ENOBUFS;
1756 }
1757
1758
1759 static int nl_add_key(struct nl_msg *msg, wpa_alg alg,
1760                       int key_idx, int defkey,
1761                       const u8 *seq, size_t seq_len,
1762                       const u8 *key, size_t key_len)
1763 {
1764         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1765         if (!key_attr)
1766                 return -1;
1767
1768         if (defkey && alg == WPA_ALG_IGTK)
1769                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1770         else if (defkey)
1771                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1772
1773         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1774
1775         switch (alg) {
1776         case WPA_ALG_WEP:
1777                 if (key_len == 5)
1778                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1779                                     WLAN_CIPHER_SUITE_WEP40);
1780                 else
1781                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1782                                     WLAN_CIPHER_SUITE_WEP104);
1783                 break;
1784         case WPA_ALG_TKIP:
1785                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1786                 break;
1787         case WPA_ALG_CCMP:
1788                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1789                 break;
1790         case WPA_ALG_IGTK:
1791                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1792                             WLAN_CIPHER_SUITE_AES_CMAC);
1793                 break;
1794         default:
1795                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1796                            "algorithm %d", __func__, alg);
1797                 return -1;
1798         }
1799
1800         if (seq && seq_len)
1801                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1802
1803         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1804
1805         nla_nest_end(msg, key_attr);
1806
1807         return 0;
1808  nla_put_failure:
1809         return -1;
1810 }
1811
1812
1813 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1814                                  struct nl_msg *msg)
1815 {
1816         int i, privacy = 0;
1817         struct nlattr *nl_keys, *nl_key;
1818
1819         for (i = 0; i < 4; i++) {
1820                 if (!params->wep_key[i])
1821                         continue;
1822                 privacy = 1;
1823                 break;
1824         }
1825         if (!privacy)
1826                 return 0;
1827
1828         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1829
1830         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1831         if (!nl_keys)
1832                 goto nla_put_failure;
1833
1834         for (i = 0; i < 4; i++) {
1835                 if (!params->wep_key[i])
1836                         continue;
1837
1838                 nl_key = nla_nest_start(msg, i);
1839                 if (!nl_key)
1840                         goto nla_put_failure;
1841
1842                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1843                         params->wep_key[i]);
1844                 if (params->wep_key_len[i] == 5)
1845                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1846                                     WLAN_CIPHER_SUITE_WEP40);
1847                 else
1848                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1849                                     WLAN_CIPHER_SUITE_WEP104);
1850
1851                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1852
1853                 if (i == params->wep_tx_keyidx)
1854                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1855
1856                 nla_nest_end(msg, nl_key);
1857         }
1858         nla_nest_end(msg, nl_keys);
1859
1860         return 0;
1861
1862 nla_put_failure:
1863         return -ENOBUFS;
1864 }
1865
1866
1867 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1868                                    const u8 *addr, int cmd, u16 reason_code)
1869 {
1870         int ret = -1;
1871         struct nl_msg *msg;
1872
1873         msg = nlmsg_alloc();
1874         if (!msg)
1875                 return -1;
1876
1877         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1878
1879         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1880         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1881         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1882
1883         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1884         msg = NULL;
1885         if (ret) {
1886                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1887                            "(%s)", ret, strerror(-ret));
1888                 goto nla_put_failure;
1889         }
1890         ret = 0;
1891
1892 nla_put_failure:
1893         nlmsg_free(msg);
1894         return ret;
1895 }
1896
1897
1898 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
1899                                          const u8 *addr, int reason_code)
1900 {
1901         wpa_printf(MSG_DEBUG, "%s", __func__);
1902         drv->associated = 0;
1903         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
1904                                        reason_code);
1905 }
1906
1907
1908 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1909                                              int reason_code)
1910 {
1911         struct wpa_driver_nl80211_data *drv = priv;
1912         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1913                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1914         wpa_printf(MSG_DEBUG, "%s", __func__);
1915         drv->associated = 0;
1916         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1917                                        reason_code);
1918 }
1919
1920
1921 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1922                                            int reason_code)
1923 {
1924         struct wpa_driver_nl80211_data *drv = priv;
1925         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1926                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1927         wpa_printf(MSG_DEBUG, "%s", __func__);
1928         drv->associated = 0;
1929         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1930                                        reason_code);
1931 }
1932
1933
1934 static int wpa_driver_nl80211_authenticate(
1935         void *priv, struct wpa_driver_auth_params *params)
1936 {
1937         struct wpa_driver_nl80211_data *drv = priv;
1938         int ret = -1, i;
1939         struct nl_msg *msg;
1940         enum nl80211_auth_type type;
1941         int count = 0;
1942
1943         drv->associated = 0;
1944         os_memset(drv->auth_bssid, 0, ETH_ALEN);
1945
1946         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
1947                 return -1;
1948
1949 retry:
1950         msg = nlmsg_alloc();
1951         if (!msg)
1952                 return -1;
1953
1954         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1955                    drv->ifindex);
1956
1957         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1958                     NL80211_CMD_AUTHENTICATE, 0);
1959
1960         for (i = 0; i < 4; i++) {
1961                 if (!params->wep_key[i])
1962                         continue;
1963                 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
1964                                            i,
1965                                            i == params->wep_tx_keyidx, NULL, 0,
1966                                            params->wep_key[i],
1967                                            params->wep_key_len[i]);
1968                 if (params->wep_tx_keyidx != i)
1969                         continue;
1970                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
1971                                params->wep_key[i], params->wep_key_len[i])) {
1972                         nlmsg_free(msg);
1973                         return -1;
1974                 }
1975         }
1976
1977         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1978         if (params->bssid) {
1979                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1980                            MAC2STR(params->bssid));
1981                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1982         }
1983         if (params->freq) {
1984                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1985                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1986         }
1987         if (params->ssid) {
1988                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1989                                   params->ssid, params->ssid_len);
1990                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1991                         params->ssid);
1992         }
1993         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1994         if (params->ie)
1995                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1996         /*
1997          * TODO: if multiple auth_alg options enabled, try them one by one if
1998          * the AP rejects authentication due to unknown auth alg
1999          */
2000         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2001                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2002         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2003                 type = NL80211_AUTHTYPE_SHARED_KEY;
2004         else if (params->auth_alg & AUTH_ALG_LEAP)
2005                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2006         else if (params->auth_alg & AUTH_ALG_FT)
2007                 type = NL80211_AUTHTYPE_FT;
2008         else
2009                 goto nla_put_failure;
2010         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2011         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2012
2013         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2014         msg = NULL;
2015         if (ret) {
2016                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2017                            "(%s)", ret, strerror(-ret));
2018                 count++;
2019                 if (ret == -EALREADY && count == 1 && params->bssid) {
2020                         /*
2021                          * mac80211 does not currently accept new
2022                          * authentication if we are already authenticated. As a
2023                          * workaround, force deauthentication and try again.
2024                          */
2025                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2026                                    "after forced deauthentication");
2027                         wpa_driver_nl80211_deauthenticate(
2028                                 drv, params->bssid,
2029                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2030                         nlmsg_free(msg);
2031                         goto retry;
2032                 }
2033                 goto nla_put_failure;
2034         }
2035         ret = 0;
2036         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2037                    "successfully");
2038
2039 nla_put_failure:
2040         nlmsg_free(msg);
2041         return ret;
2042 }
2043
2044
2045 struct phy_info_arg {
2046         u16 *num_modes;
2047         struct hostapd_hw_modes *modes;
2048 };
2049
2050 static int phy_info_handler(struct nl_msg *msg, void *arg)
2051 {
2052         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2053         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2054         struct phy_info_arg *phy_info = arg;
2055
2056         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2057
2058         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2059         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2060                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2061                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2062                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2063                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2064                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2065                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2066         };
2067
2068         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2069         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2070                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2071                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2072         };
2073
2074         struct nlattr *nl_band;
2075         struct nlattr *nl_freq;
2076         struct nlattr *nl_rate;
2077         int rem_band, rem_freq, rem_rate;
2078         struct hostapd_hw_modes *mode;
2079         int idx, mode_is_set;
2080
2081         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2082                   genlmsg_attrlen(gnlh, 0), NULL);
2083
2084         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2085                 return NL_SKIP;
2086
2087         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2088                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2089                 if (!mode)
2090                         return NL_SKIP;
2091                 phy_info->modes = mode;
2092
2093                 mode_is_set = 0;
2094
2095                 mode = &phy_info->modes[*(phy_info->num_modes)];
2096                 memset(mode, 0, sizeof(*mode));
2097                 *(phy_info->num_modes) += 1;
2098
2099                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2100                           nla_len(nl_band), NULL);
2101
2102                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2103                         mode->ht_capab = nla_get_u16(
2104                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2105                 }
2106
2107                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2108                         mode->a_mpdu_params |= nla_get_u8(
2109                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2110                                 0x03;
2111                 }
2112
2113                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2114                         mode->a_mpdu_params |= nla_get_u8(
2115                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2116                                 2;
2117                 }
2118
2119                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2120                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2121                         u8 *mcs;
2122                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2123                         os_memcpy(mode->mcs_set, mcs, 16);
2124                 }
2125
2126                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2127                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2128                                   nla_len(nl_freq), freq_policy);
2129                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2130                                 continue;
2131                         mode->num_channels++;
2132                 }
2133
2134                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
2135                 if (!mode->channels)
2136                         return NL_SKIP;
2137
2138                 idx = 0;
2139
2140                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2141                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2142                                   nla_len(nl_freq), freq_policy);
2143                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2144                                 continue;
2145
2146                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2147                         mode->channels[idx].flag = 0;
2148
2149                         if (!mode_is_set) {
2150                                 /* crude heuristic */
2151                                 if (mode->channels[idx].freq < 4000)
2152                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2153                                 else
2154                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2155                                 mode_is_set = 1;
2156                         }
2157
2158                         /* crude heuristic */
2159                         if (mode->channels[idx].freq < 4000)
2160                                 if (mode->channels[idx].freq == 2484)
2161                                         mode->channels[idx].chan = 14;
2162                                 else
2163                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2164                         else
2165                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2166
2167                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2168                                 mode->channels[idx].flag |=
2169                                         HOSTAPD_CHAN_DISABLED;
2170                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2171                                 mode->channels[idx].flag |=
2172                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2173                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2174                                 mode->channels[idx].flag |=
2175                                         HOSTAPD_CHAN_NO_IBSS;
2176                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2177                                 mode->channels[idx].flag |=
2178                                         HOSTAPD_CHAN_RADAR;
2179
2180                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2181                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2182                                 mode->channels[idx].max_tx_power =
2183                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2184
2185                         idx++;
2186                 }
2187
2188                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2189                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2190                                   nla_len(nl_rate), rate_policy);
2191                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2192                                 continue;
2193                         mode->num_rates++;
2194                 }
2195
2196                 mode->rates = calloc(mode->num_rates, sizeof(int));
2197                 if (!mode->rates)
2198                         return NL_SKIP;
2199
2200                 idx = 0;
2201
2202                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2203                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2204                                   nla_len(nl_rate), rate_policy);
2205                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2206                                 continue;
2207                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2208
2209                         /* crude heuristic */
2210                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2211                             mode->rates[idx] > 200)
2212                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2213
2214                         idx++;
2215                 }
2216         }
2217
2218         return NL_SKIP;
2219 }
2220
2221 static struct hostapd_hw_modes *
2222 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2223 {
2224         u16 m;
2225         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2226         int i, mode11g_idx = -1;
2227
2228         /* If only 802.11g mode is included, use it to construct matching
2229          * 802.11b mode data. */
2230
2231         for (m = 0; m < *num_modes; m++) {
2232                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2233                         return modes; /* 802.11b already included */
2234                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2235                         mode11g_idx = m;
2236         }
2237
2238         if (mode11g_idx < 0)
2239                 return modes; /* 2.4 GHz band not supported at all */
2240
2241         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2242         if (nmodes == NULL)
2243                 return modes; /* Could not add 802.11b mode */
2244
2245         mode = &nmodes[*num_modes];
2246         os_memset(mode, 0, sizeof(*mode));
2247         (*num_modes)++;
2248         modes = nmodes;
2249
2250         mode->mode = HOSTAPD_MODE_IEEE80211B;
2251
2252         mode11g = &modes[mode11g_idx];
2253         mode->num_channels = mode11g->num_channels;
2254         mode->channels = os_malloc(mode11g->num_channels *
2255                                    sizeof(struct hostapd_channel_data));
2256         if (mode->channels == NULL) {
2257                 (*num_modes)--;
2258                 return modes; /* Could not add 802.11b mode */
2259         }
2260         os_memcpy(mode->channels, mode11g->channels,
2261                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2262
2263         mode->num_rates = 0;
2264         mode->rates = os_malloc(4 * sizeof(int));
2265         if (mode->rates == NULL) {
2266                 os_free(mode->channels);
2267                 (*num_modes)--;
2268                 return modes; /* Could not add 802.11b mode */
2269         }
2270
2271         for (i = 0; i < mode11g->num_rates; i++) {
2272                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2273                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2274                         continue;
2275                 mode->rates[mode->num_rates] = mode11g->rates[i];
2276                 mode->num_rates++;
2277                 if (mode->num_rates == 4)
2278                         break;
2279         }
2280
2281         if (mode->num_rates == 0) {
2282                 os_free(mode->channels);
2283                 os_free(mode->rates);
2284                 (*num_modes)--;
2285                 return modes; /* No 802.11b rates */
2286         }
2287
2288         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2289                    "information");
2290
2291         return modes;
2292 }
2293
2294
2295 static struct hostapd_hw_modes *
2296 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2297 {
2298         struct wpa_driver_nl80211_data *drv = priv;
2299         struct nl_msg *msg;
2300         struct phy_info_arg result = {
2301                 .num_modes = num_modes,
2302                 .modes = NULL,
2303         };
2304
2305         *num_modes = 0;
2306         *flags = 0;
2307
2308         msg = nlmsg_alloc();
2309         if (!msg)
2310                 return NULL;
2311
2312         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2313                     0, NL80211_CMD_GET_WIPHY, 0);
2314
2315         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2316
2317         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2318                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2319  nla_put_failure:
2320         return NULL;
2321 }
2322
2323
2324 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2325                                          const void *data, size_t len,
2326                                          int encrypt)
2327 {
2328         __u8 rtap_hdr[] = {
2329                 0x00, 0x00, /* radiotap version */
2330                 0x0e, 0x00, /* radiotap length */
2331                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2332                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2333                 0x00,       /* padding */
2334                 0x00, 0x00, /* RX and TX flags to indicate that */
2335                 0x00, 0x00, /* this is the injected frame directly */
2336         };
2337         struct iovec iov[2] = {
2338                 {
2339                         .iov_base = &rtap_hdr,
2340                         .iov_len = sizeof(rtap_hdr),
2341                 },
2342                 {
2343                         .iov_base = (void *) data,
2344                         .iov_len = len,
2345                 }
2346         };
2347         struct msghdr msg = {
2348                 .msg_name = NULL,
2349                 .msg_namelen = 0,
2350                 .msg_iov = iov,
2351                 .msg_iovlen = 2,
2352                 .msg_control = NULL,
2353                 .msg_controllen = 0,
2354                 .msg_flags = 0,
2355         };
2356
2357         if (encrypt)
2358                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2359
2360         return sendmsg(drv->monitor_sock, &msg, 0);
2361 }
2362
2363
2364 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2365                                         size_t data_len)
2366 {
2367         struct wpa_driver_nl80211_data *drv = priv;
2368         struct ieee80211_mgmt *mgmt;
2369         int encrypt = 1;
2370         u16 fc;
2371
2372         mgmt = (struct ieee80211_mgmt *) data;
2373         fc = le_to_host16(mgmt->frame_control);
2374
2375         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2376             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2377                 /*
2378                  * Only one of the authentication frame types is encrypted.
2379                  * In order for static WEP encryption to work properly (i.e.,
2380                  * to not encrypt the frame), we need to tell mac80211 about
2381                  * the frames that must not be encrypted.
2382                  */
2383                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2384                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2385                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2386                         encrypt = 0;
2387         }
2388
2389         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2390 }
2391
2392
2393 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2394                                          const u8 *head, size_t head_len,
2395                                          const u8 *tail, size_t tail_len,
2396                                          int dtim_period, int beacon_int)
2397 {
2398         struct wpa_driver_nl80211_data *drv = priv;
2399         struct nl_msg *msg;
2400         u8 cmd = NL80211_CMD_NEW_BEACON;
2401         int ret;
2402         int beacon_set;
2403         int ifindex = if_nametoindex(ifname);
2404 #ifdef HOSTAPD
2405         struct i802_bss *bss;
2406
2407         bss = get_bss(drv, ifindex);
2408         if (bss == NULL)
2409                 return -ENOENT;
2410         beacon_set = bss->beacon_set;
2411 #else /* HOSTAPD */
2412         beacon_set = drv->beacon_set;
2413 #endif /* HOSTAPD */
2414
2415         msg = nlmsg_alloc();
2416         if (!msg)
2417                 return -ENOMEM;
2418
2419         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2420                    beacon_set);
2421         if (beacon_set)
2422                 cmd = NL80211_CMD_SET_BEACON;
2423
2424         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2425                     0, cmd, 0);
2426         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2427         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2428         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2429         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2430         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2431
2432         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2433         if (ret) {
2434                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2435                            ret, strerror(-ret));
2436         } else {
2437 #ifdef HOSTAPD
2438                 bss->beacon_set = 1;
2439 #else /* HOSTAPD */
2440                 drv->beacon_set = 1;
2441 #endif /* HOSTAPD */
2442         }
2443         return ret;
2444  nla_put_failure:
2445         return -ENOBUFS;
2446 }
2447
2448
2449 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2450                                        int freq, int ht_enabled,
2451                                        int sec_channel_offset)
2452 {
2453         struct nl_msg *msg;
2454         int ret;
2455
2456         msg = nlmsg_alloc();
2457         if (!msg)
2458                 return -1;
2459
2460         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2461                     NL80211_CMD_SET_WIPHY, 0);
2462
2463         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2464         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2465         if (ht_enabled) {
2466                 switch (sec_channel_offset) {
2467                 case -1:
2468                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2469                                     NL80211_CHAN_HT40MINUS);
2470                         break;
2471                 case 1:
2472                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2473                                     NL80211_CHAN_HT40PLUS);
2474                         break;
2475                 default:
2476                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2477                                     NL80211_CHAN_HT20);
2478                         break;
2479                 }
2480         }
2481
2482         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2483         if (ret == 0)
2484                 return 0;
2485         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2486                    "%d (%s)", freq, ret, strerror(-ret));
2487 nla_put_failure:
2488         return -1;
2489 }
2490
2491
2492 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2493                                       struct hostapd_sta_add_params *params)
2494 {
2495         struct wpa_driver_nl80211_data *drv = priv;
2496         struct nl_msg *msg;
2497         int ret = -ENOBUFS;
2498
2499         msg = nlmsg_alloc();
2500         if (!msg)
2501                 return -ENOMEM;
2502
2503         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2504                     0, NL80211_CMD_NEW_STATION, 0);
2505
2506         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2507         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2508         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2509         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2510                 params->supp_rates);
2511         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2512                     params->listen_interval);
2513         if (params->ht_capabilities) {
2514                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2515                         sizeof(*params->ht_capabilities),
2516                         params->ht_capabilities);
2517         }
2518
2519         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2520         if (ret)
2521                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2522                            "result: %d (%s)", ret, strerror(-ret));
2523         if (ret == -EEXIST)
2524                 ret = 0;
2525  nla_put_failure:
2526         return ret;
2527 }
2528
2529
2530 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2531 {
2532         struct wpa_driver_nl80211_data *drv = priv;
2533         struct nl_msg *msg;
2534         int ret;
2535
2536         msg = nlmsg_alloc();
2537         if (!msg)
2538                 return -ENOMEM;
2539
2540         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2541                     0, NL80211_CMD_DEL_STATION, 0);
2542
2543         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2544                     if_nametoindex(drv->ifname));
2545         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2546
2547         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2548         if (ret == -ENOENT)
2549                 return 0;
2550         return ret;
2551  nla_put_failure:
2552         return -ENOBUFS;
2553 }
2554
2555
2556 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2557                                  int ifidx)
2558 {
2559         struct nl_msg *msg;
2560
2561 #ifdef HOSTAPD
2562         /* stop listening for EAPOL on this interface */
2563         del_ifidx(drv, ifidx);
2564 #endif /* HOSTAPD */
2565
2566         msg = nlmsg_alloc();
2567         if (!msg)
2568                 goto nla_put_failure;
2569
2570         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2571                     0, NL80211_CMD_DEL_INTERFACE, 0);
2572         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2573
2574         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2575                 return;
2576  nla_put_failure:
2577         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2578                    ifidx);
2579 }
2580
2581
2582 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2583                                      const char *ifname,
2584                                      enum nl80211_iftype iftype,
2585                                      const u8 *addr)
2586 {
2587         struct nl_msg *msg, *flags = NULL;
2588         int ifidx;
2589         int ret = -ENOBUFS;
2590
2591         msg = nlmsg_alloc();
2592         if (!msg)
2593                 return -1;
2594
2595         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2596                     0, NL80211_CMD_NEW_INTERFACE, 0);
2597         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2598         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2599         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2600
2601         if (iftype == NL80211_IFTYPE_MONITOR) {
2602                 int err;
2603
2604                 flags = nlmsg_alloc();
2605                 if (!flags)
2606                         goto nla_put_failure;
2607
2608                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2609
2610                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2611
2612                 nlmsg_free(flags);
2613
2614                 if (err)
2615                         goto nla_put_failure;
2616         }
2617
2618         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2619         if (ret) {
2620  nla_put_failure:
2621                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2622                            ifname, ret, strerror(-ret));
2623                 return ret;
2624         }
2625
2626         ifidx = if_nametoindex(ifname);
2627
2628         if (ifidx <= 0)
2629                 return -1;
2630
2631 #ifdef HOSTAPD
2632         /* start listening for EAPOL on this interface */
2633         add_ifidx(drv, ifidx);
2634
2635         if (addr && iftype == NL80211_IFTYPE_AP &&
2636             set_ifhwaddr(drv, ifname, addr)) {
2637                 nl80211_remove_iface(drv, ifidx);
2638                 return -1;
2639         }
2640 #endif /* HOSTAPD */
2641
2642         return ifidx;
2643 }
2644
2645
2646 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2647                                 const char *ifname, enum nl80211_iftype iftype,
2648                                 const u8 *addr)
2649 {
2650         int ret;
2651
2652         ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2653
2654         /* if error occured and interface exists already */
2655         if (ret == -ENFILE && if_nametoindex(ifname)) {
2656                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2657
2658                 /* Try to remove the interface that was already there. */
2659                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2660
2661                 /* Try to create the interface again */
2662                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2663         }
2664
2665         return ret;
2666 }
2667
2668
2669 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2670 {
2671         struct ieee80211_hdr *hdr;
2672         u16 fc;
2673         union wpa_event_data event;
2674
2675         hdr = (struct ieee80211_hdr *) buf;
2676         fc = le_to_host16(hdr->frame_control);
2677
2678         os_memset(&event, 0, sizeof(event));
2679         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
2680         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
2681         event.tx_status.dst = hdr->addr1;
2682         event.tx_status.data = buf;
2683         event.tx_status.data_len = len;
2684         event.tx_status.ack = ok;
2685         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
2686 }
2687
2688
2689 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2690                              struct ieee80211_hdr *hdr, size_t len)
2691 {
2692         union wpa_event_data event;
2693         os_memset(&event, 0, sizeof(event));
2694         event.rx_from_unknown.hdr = hdr;
2695         event.rx_from_unknown.len = len;
2696         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
2697 }
2698
2699
2700 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2701                          u8 *buf, size_t len,
2702                          struct hostapd_frame_info *hfi)
2703 {
2704         struct ieee80211_hdr *hdr;
2705         u16 fc;
2706         union wpa_event_data event;
2707
2708         hdr = (struct ieee80211_hdr *) buf;
2709         fc = le_to_host16(hdr->frame_control);
2710
2711         switch (WLAN_FC_GET_TYPE(fc)) {
2712         case WLAN_FC_TYPE_MGMT:
2713                 os_memset(&event, 0, sizeof(event));
2714                 event.rx_mgmt.frame = buf;
2715                 event.rx_mgmt.frame_len = len;
2716                 event.rx_mgmt.fi = hfi;
2717                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
2718                 break;
2719         case WLAN_FC_TYPE_CTRL:
2720                 /* can only get here with PS-Poll frames */
2721                 wpa_printf(MSG_DEBUG, "CTRL");
2722                 from_unknown_sta(drv, hdr, len);
2723                 break;
2724         case WLAN_FC_TYPE_DATA:
2725                 from_unknown_sta(drv, hdr, len);
2726                 break;
2727         }
2728 }
2729
2730
2731 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2732 {
2733         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2734         int len;
2735         unsigned char buf[3000];
2736         struct ieee80211_radiotap_iterator iter;
2737         int ret;
2738         struct hostapd_frame_info hfi;
2739         int injected = 0, failed = 0, rxflags = 0;
2740
2741         len = recv(sock, buf, sizeof(buf), 0);
2742         if (len < 0) {
2743                 perror("recv");
2744                 return;
2745         }
2746
2747         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2748                 printf("received invalid radiotap frame\n");
2749                 return;
2750         }
2751
2752         memset(&hfi, 0, sizeof(hfi));
2753
2754         while (1) {
2755                 ret = ieee80211_radiotap_iterator_next(&iter);
2756                 if (ret == -ENOENT)
2757                         break;
2758                 if (ret) {
2759                         printf("received invalid radiotap frame (%d)\n", ret);
2760                         return;
2761                 }
2762                 switch (iter.this_arg_index) {
2763                 case IEEE80211_RADIOTAP_FLAGS:
2764                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2765                                 len -= 4;
2766                         break;
2767                 case IEEE80211_RADIOTAP_RX_FLAGS:
2768                         rxflags = 1;
2769                         break;
2770                 case IEEE80211_RADIOTAP_TX_FLAGS:
2771                         injected = 1;
2772                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2773                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2774                         break;
2775                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2776                         break;
2777                 case IEEE80211_RADIOTAP_CHANNEL:
2778                         /* TODO convert from freq/flags to channel number
2779                         hfi.channel = XXX;
2780                          */
2781                         break;
2782                 case IEEE80211_RADIOTAP_RATE:
2783                         hfi.datarate = *iter.this_arg * 5;
2784                         break;
2785                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2786                         hfi.ssi_signal = *iter.this_arg;
2787                         break;
2788                 }
2789         }
2790
2791         if (rxflags && injected)
2792                 return;
2793
2794         if (!injected)
2795                 handle_frame(drv, buf + iter.max_length,
2796                              len - iter.max_length, &hfi);
2797         else
2798                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2799                                    len - iter.max_length, !failed);
2800 }
2801
2802
2803 /*
2804  * we post-process the filter code later and rewrite
2805  * this to the offset to the last instruction
2806  */
2807 #define PASS    0xFF
2808 #define FAIL    0xFE
2809
2810 static struct sock_filter msock_filter_insns[] = {
2811         /*
2812          * do a little-endian load of the radiotap length field
2813          */
2814         /* load lower byte into A */
2815         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2816         /* put it into X (== index register) */
2817         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2818         /* load upper byte into A */
2819         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2820         /* left-shift it by 8 */
2821         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2822         /* or with X */
2823         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2824         /* put result into X */
2825         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2826
2827         /*
2828          * Allow management frames through, this also gives us those
2829          * management frames that we sent ourselves with status
2830          */
2831         /* load the lower byte of the IEEE 802.11 frame control field */
2832         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2833         /* mask off frame type and version */
2834         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2835         /* accept frame if it's both 0, fall through otherwise */
2836         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2837
2838         /*
2839          * TODO: add a bit to radiotap RX flags that indicates
2840          * that the sending station is not associated, then
2841          * add a filter here that filters on our DA and that flag
2842          * to allow us to deauth frames to that bad station.
2843          *
2844          * Not a regression -- we didn't do it before either.
2845          */
2846
2847 #if 0
2848         /*
2849          * drop non-data frames, WDS frames
2850          */
2851         /* load the lower byte of the frame control field */
2852         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2853         /* mask off QoS bit */
2854         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2855         /* drop non-data frames */
2856         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2857         /* load the upper byte of the frame control field */
2858         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2859         /* mask off toDS/fromDS */
2860         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2861         /* drop WDS frames */
2862         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2863 #endif
2864
2865         /*
2866          * add header length to index
2867          */
2868         /* load the lower byte of the frame control field */
2869         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2870         /* mask off QoS bit */
2871         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2872         /* right shift it by 6 to give 0 or 2 */
2873         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2874         /* add data frame header length */
2875         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2876         /* add index, was start of 802.11 header */
2877         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2878         /* move to index, now start of LL header */
2879         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2880
2881         /*
2882          * Accept empty data frames, we use those for
2883          * polling activity.
2884          */
2885         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2886         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2887
2888         /*
2889          * Accept EAPOL frames
2890          */
2891         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2892         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2893         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2894         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2895
2896         /* keep these last two statements or change the code below */
2897         /* return 0 == "DROP" */
2898         BPF_STMT(BPF_RET | BPF_K, 0),
2899         /* return ~0 == "keep all" */
2900         BPF_STMT(BPF_RET | BPF_K, ~0),
2901 };
2902
2903 static struct sock_fprog msock_filter = {
2904         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2905         .filter = msock_filter_insns,
2906 };
2907
2908
2909 static int add_monitor_filter(int s)
2910 {
2911         int idx;
2912
2913         /* rewrite all PASS/FAIL jump offsets */
2914         for (idx = 0; idx < msock_filter.len; idx++) {
2915                 struct sock_filter *insn = &msock_filter_insns[idx];
2916
2917                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2918                         if (insn->code == (BPF_JMP|BPF_JA)) {
2919                                 if (insn->k == PASS)
2920                                         insn->k = msock_filter.len - idx - 2;
2921                                 else if (insn->k == FAIL)
2922                                         insn->k = msock_filter.len - idx - 3;
2923                         }
2924
2925                         if (insn->jt == PASS)
2926                                 insn->jt = msock_filter.len - idx - 2;
2927                         else if (insn->jt == FAIL)
2928                                 insn->jt = msock_filter.len - idx - 3;
2929
2930                         if (insn->jf == PASS)
2931                                 insn->jf = msock_filter.len - idx - 2;
2932                         else if (insn->jf == FAIL)
2933                                 insn->jf = msock_filter.len - idx - 3;
2934                 }
2935         }
2936
2937         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2938                        &msock_filter, sizeof(msock_filter))) {
2939                 perror("SO_ATTACH_FILTER");
2940                 return -1;
2941         }
2942
2943         return 0;
2944 }
2945
2946
2947 static void nl80211_remove_monitor_interface(
2948         struct wpa_driver_nl80211_data *drv)
2949 {
2950         if (drv->monitor_ifidx >= 0) {
2951                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2952                 drv->monitor_ifidx = -1;
2953         }
2954 }
2955
2956
2957 static int
2958 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2959 {
2960         char buf[IFNAMSIZ];
2961         struct sockaddr_ll ll;
2962         int optval;
2963         socklen_t optlen;
2964
2965         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2966         buf[IFNAMSIZ - 1] = '\0';
2967
2968         drv->monitor_ifidx =
2969                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
2970
2971         if (drv->monitor_ifidx < 0)
2972                 return -1;
2973
2974         if (hostapd_set_iface_flags(drv, buf, 1))
2975                 goto error;
2976
2977         memset(&ll, 0, sizeof(ll));
2978         ll.sll_family = AF_PACKET;
2979         ll.sll_ifindex = drv->monitor_ifidx;
2980         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2981         if (drv->monitor_sock < 0) {
2982                 perror("socket[PF_PACKET,SOCK_RAW]");
2983                 goto error;
2984         }
2985
2986         if (add_monitor_filter(drv->monitor_sock)) {
2987                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2988                            "interface; do filtering in user space");
2989                 /* This works, but will cost in performance. */
2990         }
2991
2992         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
2993                 perror("monitor socket bind");
2994                 goto error;
2995         }
2996
2997         optlen = sizeof(optval);
2998         optval = 20;
2999         if (setsockopt
3000             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3001                 perror("Failed to set socket priority");
3002                 goto error;
3003         }
3004
3005         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3006                                      drv, NULL)) {
3007                 printf("Could not register monitor read socket\n");
3008                 goto error;
3009         }
3010
3011         return 0;
3012  error:
3013         nl80211_remove_monitor_interface(drv);
3014         return -1;
3015 }
3016
3017
3018 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3019
3020 static int wpa_driver_nl80211_hapd_send_eapol(
3021         void *priv, const u8 *addr, const u8 *data,
3022         size_t data_len, int encrypt, const u8 *own_addr)
3023 {
3024         struct wpa_driver_nl80211_data *drv = priv;
3025         struct ieee80211_hdr *hdr;
3026         size_t len;
3027         u8 *pos;
3028         int res;
3029 #if 0 /* FIX */
3030         int qos = sta->flags & WPA_STA_WMM;
3031 #else
3032         int qos = 0;
3033 #endif
3034
3035         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3036                 data_len;
3037         hdr = os_zalloc(len);
3038         if (hdr == NULL) {
3039                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3040                        (unsigned long) len);
3041                 return -1;
3042         }
3043
3044         hdr->frame_control =
3045                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3046         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3047         if (encrypt)
3048                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3049 #if 0 /* To be enabled if qos determination is added above */
3050         if (qos) {
3051                 hdr->frame_control |=
3052                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3053         }
3054 #endif
3055
3056         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3057         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3058         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3059         pos = (u8 *) (hdr + 1);
3060
3061 #if 0 /* To be enabled if qos determination is added above */
3062         if (qos) {
3063                 /* add an empty QoS header if needed */
3064                 pos[0] = 0;
3065                 pos[1] = 0;
3066                 pos += 2;
3067         }
3068 #endif
3069
3070         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3071         pos += sizeof(rfc1042_header);
3072         WPA_PUT_BE16(pos, ETH_P_PAE);
3073         pos += 2;
3074         memcpy(pos, data, data_len);
3075
3076         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3077         if (res < 0) {
3078                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3079                            "failed: %d (%s)",
3080                            (unsigned long) len, errno, strerror(errno));
3081         }
3082         free(hdr);
3083
3084         return res;
3085 }
3086
3087
3088 static u32 sta_flags_nl80211(int flags)
3089 {
3090         u32 f = 0;
3091
3092         if (flags & WPA_STA_AUTHORIZED)
3093                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3094         if (flags & WPA_STA_WMM)
3095                 f |= BIT(NL80211_STA_FLAG_WME);
3096         if (flags & WPA_STA_SHORT_PREAMBLE)
3097                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3098         if (flags & WPA_STA_MFP)
3099                 f |= BIT(NL80211_STA_FLAG_MFP);
3100
3101         return f;
3102 }
3103
3104
3105 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3106                                             int total_flags, int flags_or,
3107                                             int flags_and)
3108 {
3109         struct wpa_driver_nl80211_data *drv = priv;
3110         struct nl_msg *msg, *flags = NULL;
3111         struct nl80211_sta_flag_update upd;
3112
3113         msg = nlmsg_alloc();
3114         if (!msg)
3115                 return -ENOMEM;
3116
3117         flags = nlmsg_alloc();
3118         if (!flags) {
3119                 nlmsg_free(msg);
3120                 return -ENOMEM;
3121         }
3122
3123         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3124                     0, NL80211_CMD_SET_STATION, 0);
3125
3126         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3127                     if_nametoindex(drv->ifname));
3128         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3129
3130         /*
3131          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3132          * can be removed eventually.
3133          */
3134         if (total_flags & WPA_STA_AUTHORIZED)
3135                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3136
3137         if (total_flags & WPA_STA_WMM)
3138                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3139
3140         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3141                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3142
3143         if (total_flags & WPA_STA_MFP)
3144                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3145
3146         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3147                 goto nla_put_failure;
3148
3149         os_memset(&upd, 0, sizeof(upd));
3150         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3151         upd.set = sta_flags_nl80211(flags_or);
3152         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3153
3154         nlmsg_free(flags);
3155
3156         return send_and_recv_msgs(drv, msg, NULL, NULL);
3157  nla_put_failure:
3158         nlmsg_free(flags);
3159         return -ENOBUFS;
3160 }
3161
3162
3163 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3164                                  struct wpa_driver_associate_params *params)
3165 {
3166         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3167             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3168                 nl80211_remove_monitor_interface(drv);
3169                 return -1;
3170         }
3171
3172         /* TODO: setup monitor interface (and add code somewhere to remove this
3173          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3174
3175         return 0;
3176 }
3177
3178
3179 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3180 {
3181         struct nl_msg *msg;
3182         int ret = -1;
3183
3184         msg = nlmsg_alloc();
3185         if (!msg)
3186                 return -1;
3187
3188         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3189                     NL80211_CMD_LEAVE_IBSS, 0);
3190         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3191         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3192         msg = NULL;
3193         if (ret) {
3194                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3195                            "(%s)", ret, strerror(-ret));
3196                 goto nla_put_failure;
3197         }
3198
3199         ret = 0;
3200         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3201
3202 nla_put_failure:
3203         nlmsg_free(msg);
3204         return ret;
3205 }
3206
3207
3208 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3209                                    struct wpa_driver_associate_params *params)
3210 {
3211         struct nl_msg *msg;
3212         int ret = -1;
3213         int count = 0;
3214
3215         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3216
3217         if (wpa_driver_nl80211_set_mode(drv, params->mode)) {
3218                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3219                            "IBSS mode");
3220                 return -1;
3221         }
3222
3223 retry:
3224         msg = nlmsg_alloc();
3225         if (!msg)
3226                 return -1;
3227
3228         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3229                     NL80211_CMD_JOIN_IBSS, 0);
3230         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3231
3232         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3233                 goto nla_put_failure;
3234
3235         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3236                           params->ssid, params->ssid_len);
3237         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3238                 params->ssid);
3239         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3240         drv->ssid_len = params->ssid_len;
3241
3242         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3243         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3244
3245         ret = nl80211_set_conn_keys(params, msg);
3246         if (ret)
3247                 goto nla_put_failure;
3248
3249         if (params->wpa_ie) {
3250                 wpa_hexdump(MSG_DEBUG,
3251                             "  * Extra IEs for Beacon/Probe Response frames",
3252                             params->wpa_ie, params->wpa_ie_len);
3253                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3254                         params->wpa_ie);
3255         }
3256
3257         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3258         msg = NULL;
3259         if (ret) {
3260                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3261                            ret, strerror(-ret));
3262                 count++;
3263                 if (ret == -EALREADY && count == 1) {
3264                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3265                                    "forced leave");
3266                         nl80211_leave_ibss(drv);
3267                         nlmsg_free(msg);
3268                         goto retry;
3269                 }
3270
3271                 goto nla_put_failure;
3272         }
3273         ret = 0;
3274         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3275
3276 nla_put_failure:
3277         nlmsg_free(msg);
3278         return ret;
3279 }
3280
3281
3282 static int wpa_driver_nl80211_connect(
3283         struct wpa_driver_nl80211_data *drv,
3284         struct wpa_driver_associate_params *params)
3285 {
3286         struct nl_msg *msg;
3287         enum nl80211_auth_type type;
3288         int ret = 0;
3289
3290         msg = nlmsg_alloc();
3291         if (!msg)
3292                 return -1;
3293
3294         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3295         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3296                     NL80211_CMD_CONNECT, 0);
3297
3298         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3299         if (params->bssid) {
3300                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3301                            MAC2STR(params->bssid));
3302                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3303         }
3304         if (params->freq) {
3305                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3306                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3307         }
3308         if (params->ssid) {
3309                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3310                                   params->ssid, params->ssid_len);
3311                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3312                         params->ssid);
3313                 if (params->ssid_len > sizeof(drv->ssid))
3314                         goto nla_put_failure;
3315                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3316                 drv->ssid_len = params->ssid_len;
3317         }
3318         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3319         if (params->wpa_ie)
3320                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3321                         params->wpa_ie);
3322
3323         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3324                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3325         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3326                 type = NL80211_AUTHTYPE_SHARED_KEY;
3327         else if (params->auth_alg & AUTH_ALG_LEAP)
3328                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3329         else if (params->auth_alg & AUTH_ALG_FT)
3330                 type = NL80211_AUTHTYPE_FT;
3331         else
3332                 goto nla_put_failure;
3333
3334         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3335         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3336
3337         if (params->wpa_ie && params->wpa_ie_len) {
3338                 enum nl80211_wpa_versions ver;
3339
3340                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3341                         ver = NL80211_WPA_VERSION_2;
3342                 else
3343                         ver = NL80211_WPA_VERSION_1;
3344
3345                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3346                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3347         }
3348
3349         if (params->pairwise_suite != CIPHER_NONE) {
3350                 int cipher;
3351
3352                 switch (params->pairwise_suite) {
3353                 case CIPHER_WEP40:
3354                         cipher = WLAN_CIPHER_SUITE_WEP40;
3355                         break;
3356                 case CIPHER_WEP104:
3357                         cipher = WLAN_CIPHER_SUITE_WEP104;
3358                         break;
3359                 case CIPHER_CCMP:
3360                         cipher = WLAN_CIPHER_SUITE_CCMP;
3361                         break;
3362                 case CIPHER_TKIP:
3363                 default:
3364                         cipher = WLAN_CIPHER_SUITE_TKIP;
3365                         break;
3366                 }
3367                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3368         }
3369
3370         if (params->group_suite != CIPHER_NONE) {
3371                 int cipher;
3372
3373                 switch (params->group_suite) {
3374                 case CIPHER_WEP40:
3375                         cipher = WLAN_CIPHER_SUITE_WEP40;
3376                         break;
3377                 case CIPHER_WEP104:
3378                         cipher = WLAN_CIPHER_SUITE_WEP104;
3379                         break;
3380                 case CIPHER_CCMP:
3381                         cipher = WLAN_CIPHER_SUITE_CCMP;
3382                         break;
3383                 case CIPHER_TKIP:
3384                 default:
3385                         cipher = WLAN_CIPHER_SUITE_TKIP;
3386                         break;
3387                 }
3388                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3389         }
3390
3391         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3392             params->key_mgmt_suite == KEY_MGMT_PSK) {
3393                 int mgmt = WLAN_AKM_SUITE_PSK;
3394
3395                 switch (params->key_mgmt_suite) {
3396                 case KEY_MGMT_802_1X:
3397                         mgmt = WLAN_AKM_SUITE_8021X;
3398                         break;
3399                 case KEY_MGMT_PSK:
3400                 default:
3401                         mgmt = WLAN_AKM_SUITE_PSK;
3402                         break;
3403                 }
3404                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3405         }
3406
3407         ret = nl80211_set_conn_keys(params, msg);
3408         if (ret)
3409                 goto nla_put_failure;
3410
3411         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3412         msg = NULL;
3413         if (ret) {
3414                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3415                            "(%s)", ret, strerror(-ret));
3416                 goto nla_put_failure;
3417         }
3418         ret = 0;
3419         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3420
3421 nla_put_failure:
3422         nlmsg_free(msg);
3423         return ret;
3424
3425 }
3426
3427
3428 static int wpa_driver_nl80211_associate(
3429         void *priv, struct wpa_driver_associate_params *params)
3430 {
3431         struct wpa_driver_nl80211_data *drv = priv;
3432         int ret = -1;
3433         struct nl_msg *msg;
3434
3435         if (params->mode == IEEE80211_MODE_AP)
3436                 return wpa_driver_nl80211_ap(drv, params);
3437
3438         if (params->mode == IEEE80211_MODE_IBSS)
3439                 return wpa_driver_nl80211_ibss(drv, params);
3440
3441         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3442                 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3443                         return -1;
3444                 return wpa_driver_nl80211_connect(drv, params);
3445         }
3446
3447         drv->associated = 0;
3448
3449         msg = nlmsg_alloc();
3450         if (!msg)
3451                 return -1;
3452
3453         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3454                    drv->ifindex);
3455         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3456                     NL80211_CMD_ASSOCIATE, 0);
3457
3458         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3459         if (params->bssid) {
3460                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3461                            MAC2STR(params->bssid));
3462                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3463         }
3464         if (params->freq) {
3465                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3466                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3467         }
3468         if (params->ssid) {
3469                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3470                                   params->ssid, params->ssid_len);
3471                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3472                         params->ssid);
3473                 if (params->ssid_len > sizeof(drv->ssid))
3474                         goto nla_put_failure;
3475                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3476                 drv->ssid_len = params->ssid_len;
3477         }
3478         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3479         if (params->wpa_ie)
3480                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3481                         params->wpa_ie);
3482
3483 #ifdef CONFIG_IEEE80211W
3484         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3485                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3486 #endif /* CONFIG_IEEE80211W */
3487
3488         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3489
3490         if (params->prev_bssid) {
3491                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3492                            MAC2STR(params->prev_bssid));
3493                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3494                         params->prev_bssid);
3495         }
3496
3497         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3498         msg = NULL;
3499         if (ret) {
3500                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3501                            "(%s)", ret, strerror(-ret));
3502                 goto nla_put_failure;
3503         }
3504         ret = 0;
3505         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3506                    "successfully");
3507
3508 nla_put_failure:
3509         nlmsg_free(msg);
3510         return ret;
3511 }
3512
3513
3514 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3515                             int ifindex, int mode)
3516 {
3517         struct nl_msg *msg;
3518         int ret = -ENOBUFS;
3519
3520         msg = nlmsg_alloc();
3521         if (!msg)
3522                 return -ENOMEM;
3523
3524         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3525                     0, NL80211_CMD_SET_INTERFACE, 0);
3526         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3527         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3528
3529         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3530         if (!ret)
3531                 return 0;
3532 nla_put_failure:
3533         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3534                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3535         return ret;
3536 }
3537
3538
3539 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3540 {
3541         struct wpa_driver_nl80211_data *drv = priv;
3542         int ret = -1;
3543         int nlmode;
3544
3545         switch (mode) {
3546         case 0:
3547                 nlmode = NL80211_IFTYPE_STATION;
3548                 break;
3549         case 1:
3550                 nlmode = NL80211_IFTYPE_ADHOC;
3551                 break;
3552         case 2:
3553                 nlmode = NL80211_IFTYPE_AP;
3554                 break;
3555         default:
3556                 return -1;
3557         }
3558
3559         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3560                 drv->nlmode = nlmode;
3561                 ret = 0;
3562                 goto done;
3563         }
3564
3565         if (nlmode == drv->nlmode) {
3566                 ret = 0;
3567                 goto done; /* Already in the requested mode */
3568         }
3569
3570         /* mac80211 doesn't allow mode changes while the device is up, so
3571          * take the device down, try to set the mode again, and bring the
3572          * device back up.
3573          */
3574         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3575                 /* Try to set the mode again while the interface is down */
3576                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3577                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3578                         ret = -1;
3579         }
3580
3581         if (!ret)
3582                 drv->nlmode = nlmode;
3583
3584 done:
3585         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3586                 /* Setup additional AP mode functionality if needed */
3587                 if (drv->monitor_ifidx < 0 &&
3588                     nl80211_create_monitor_interface(drv))
3589                         return -1;
3590         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3591                 /* Remove additional AP mode functionality */
3592                 nl80211_remove_monitor_interface(drv);
3593         }
3594
3595         return ret;
3596 }
3597
3598
3599 static int wpa_driver_nl80211_get_capa(void *priv,
3600                                        struct wpa_driver_capa *capa)
3601 {
3602         struct wpa_driver_nl80211_data *drv = priv;
3603         if (!drv->has_capability)
3604                 return -1;
3605         os_memcpy(capa, &drv->capa, sizeof(*capa));
3606         return 0;
3607 }
3608
3609
3610 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3611 {
3612         struct wpa_driver_nl80211_data *drv = priv;
3613
3614         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3615                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3616         drv->operstate = state;
3617         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
3618                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
3619 }
3620
3621
3622 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3623 {
3624         struct wpa_driver_nl80211_data *drv = priv;
3625         struct nl_msg *msg;
3626         struct nl80211_sta_flag_update upd;
3627
3628         msg = nlmsg_alloc();
3629         if (!msg)
3630                 return -ENOMEM;
3631
3632         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3633                     0, NL80211_CMD_SET_STATION, 0);
3634
3635         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3636                     if_nametoindex(drv->ifname));
3637         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3638
3639         os_memset(&upd, 0, sizeof(upd));
3640         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3641         if (authorized)
3642                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3643         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3644
3645         return send_and_recv_msgs(drv, msg, NULL, NULL);
3646  nla_put_failure:
3647         return -ENOBUFS;
3648 }
3649
3650
3651 #ifdef HOSTAPD
3652
3653 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3654                                  int ifindex)
3655 {
3656         struct i802_bss *bss = &drv->bss;
3657         while (bss) {
3658                 if (ifindex == bss->ifindex)
3659                         return bss;
3660                 bss = bss->next;
3661         }
3662         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3663         return NULL;
3664 }
3665
3666
3667 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3668 {
3669         int i;
3670         int *old;
3671
3672         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3673                    ifidx);
3674         for (i = 0; i < drv->num_if_indices; i++) {
3675                 if (drv->if_indices[i] == 0) {
3676                         drv->if_indices[i] = ifidx;
3677                         return;
3678                 }
3679         }
3680
3681         if (drv->if_indices != drv->default_if_indices)
3682                 old = drv->if_indices;
3683         else
3684                 old = NULL;
3685
3686         drv->if_indices = realloc(old,
3687                                   sizeof(int) * (drv->num_if_indices + 1));
3688         if (!drv->if_indices) {
3689                 if (!old)
3690                         drv->if_indices = drv->default_if_indices;
3691                 else
3692                         drv->if_indices = old;
3693                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3694                            "interfaces");
3695                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3696                 return;
3697         }
3698         drv->if_indices[drv->num_if_indices] = ifidx;
3699         drv->num_if_indices++;
3700 }
3701
3702
3703 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3704 {
3705         int i;
3706
3707         for (i = 0; i < drv->num_if_indices; i++) {
3708                 if (drv->if_indices[i] == ifidx) {
3709                         drv->if_indices[i] = 0;
3710                         break;
3711                 }
3712         }
3713 }
3714
3715
3716 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3717 {
3718         int i;
3719
3720         for (i = 0; i < drv->num_if_indices; i++)
3721                 if (drv->if_indices[i] == ifidx)
3722                         return 1;
3723
3724         return 0;
3725 }
3726
3727
3728 static inline int min_int(int a, int b)
3729 {
3730         if (a < b)
3731                 return a;
3732         return b;
3733 }
3734
3735
3736 static int get_key_handler(struct nl_msg *msg, void *arg)
3737 {
3738         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3739         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3740
3741         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3742                   genlmsg_attrlen(gnlh, 0), NULL);
3743
3744         /*
3745          * TODO: validate the key index and mac address!
3746          * Otherwise, there's a race condition as soon as
3747          * the kernel starts sending key notifications.
3748          */
3749
3750         if (tb[NL80211_ATTR_KEY_SEQ])
3751                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3752                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3753         return NL_SKIP;
3754 }
3755
3756
3757 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3758                            int idx, u8 *seq)
3759 {
3760         struct wpa_driver_nl80211_data *drv = priv;
3761         struct nl_msg *msg;
3762
3763         msg = nlmsg_alloc();
3764         if (!msg)
3765                 return -ENOMEM;
3766
3767         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3768                     0, NL80211_CMD_GET_KEY, 0);
3769
3770         if (addr)
3771                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3772         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3773         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3774
3775         memset(seq, 0, 6);
3776
3777         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3778  nla_put_failure:
3779         return -ENOBUFS;
3780 }
3781
3782
3783 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3784                               int mode)
3785 {
3786         struct wpa_driver_nl80211_data *drv = priv;
3787         struct nl_msg *msg;
3788         u8 rates[NL80211_MAX_SUPP_RATES];
3789         u8 rates_len = 0;
3790         int i;
3791
3792         msg = nlmsg_alloc();
3793         if (!msg)
3794                 return -ENOMEM;
3795
3796         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3797                     NL80211_CMD_SET_BSS, 0);
3798
3799         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3800                 rates[rates_len++] = basic_rates[i] / 5;
3801
3802         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3803
3804         /* TODO: multi-BSS support */
3805         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3806
3807         return send_and_recv_msgs(drv, msg, NULL, NULL);
3808  nla_put_failure:
3809         return -ENOBUFS;
3810 }
3811
3812
3813 /* Set kernel driver on given frequency (MHz) */
3814 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3815 {
3816         struct wpa_driver_nl80211_data *drv = priv;
3817         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3818                                            freq->sec_channel_offset);
3819 }
3820
3821
3822 static int i802_set_rts(void *priv, int rts)
3823 {
3824         struct wpa_driver_nl80211_data *drv = priv;
3825         struct nl_msg *msg;
3826         int ret = -ENOBUFS;
3827         u32 val;
3828
3829         msg = nlmsg_alloc();
3830         if (!msg)
3831                 return -ENOMEM;
3832
3833         if (rts >= 2347)
3834                 val = (u32) -1;
3835         else
3836                 val = rts;
3837
3838         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3839                     0, NL80211_CMD_SET_WIPHY, 0);
3840         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3841         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3842
3843         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3844         if (!ret)
3845                 return 0;
3846 nla_put_failure:
3847         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3848                    "%d (%s)", rts, ret, strerror(-ret));
3849         return ret;
3850 }
3851
3852
3853 static int i802_set_frag(void *priv, int frag)
3854 {
3855         struct wpa_driver_nl80211_data *drv = priv;
3856         struct nl_msg *msg;
3857         int ret = -ENOBUFS;
3858         u32 val;
3859
3860         msg = nlmsg_alloc();
3861         if (!msg)
3862                 return -ENOMEM;
3863
3864         if (frag >= 2346)
3865                 val = (u32) -1;
3866         else
3867                 val = frag;
3868
3869         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3870                     0, NL80211_CMD_SET_WIPHY, 0);
3871         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3872         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3873
3874         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3875         if (!ret)
3876                 return 0;
3877 nla_put_failure:
3878         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3879                    "%d: %d (%s)", frag, ret, strerror(-ret));
3880         return ret;
3881 }
3882
3883
3884 static int i802_flush(void *priv)
3885 {
3886         struct wpa_driver_nl80211_data *drv = priv;
3887         struct nl_msg *msg;
3888
3889         msg = nlmsg_alloc();
3890         if (!msg)
3891                 return -1;
3892
3893         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3894                     0, NL80211_CMD_DEL_STATION, 0);
3895
3896         /*
3897          * XXX: FIX! this needs to flush all VLANs too
3898          */
3899         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3900                     if_nametoindex(drv->ifname));
3901
3902         return send_and_recv_msgs(drv, msg, NULL, NULL);
3903  nla_put_failure:
3904         return -ENOBUFS;
3905 }
3906
3907
3908 static int get_sta_handler(struct nl_msg *msg, void *arg)
3909 {
3910         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3911         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3912         struct hostap_sta_driver_data *data = arg;
3913         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3914         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3915                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3916                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3917                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3918                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3919                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3920         };
3921
3922         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3923                   genlmsg_attrlen(gnlh, 0), NULL);
3924
3925         /*
3926          * TODO: validate the interface and mac address!
3927          * Otherwise, there's a race condition as soon as
3928          * the kernel starts sending station notifications.
3929          */
3930
3931         if (!tb[NL80211_ATTR_STA_INFO]) {
3932                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3933                 return NL_SKIP;
3934         }
3935         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3936                              tb[NL80211_ATTR_STA_INFO],
3937                              stats_policy)) {
3938                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3939                 return NL_SKIP;
3940         }
3941
3942         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3943                 data->inactive_msec =
3944                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3945         if (stats[NL80211_STA_INFO_RX_BYTES])
3946                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3947         if (stats[NL80211_STA_INFO_TX_BYTES])
3948                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3949         if (stats[NL80211_STA_INFO_RX_PACKETS])
3950                 data->rx_packets =
3951                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3952         if (stats[NL80211_STA_INFO_TX_PACKETS])
3953                 data->tx_packets =
3954                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3955
3956         return NL_SKIP;
3957 }
3958
3959 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3960                               const u8 *addr)
3961 {
3962         struct wpa_driver_nl80211_data *drv = priv;
3963         struct nl_msg *msg;
3964
3965         os_memset(data, 0, sizeof(*data));
3966         msg = nlmsg_alloc();
3967         if (!msg)
3968                 return -ENOMEM;
3969
3970         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3971                     0, NL80211_CMD_GET_STATION, 0);
3972
3973         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3974         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3975
3976         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3977  nla_put_failure:
3978         return -ENOBUFS;
3979 }
3980
3981
3982 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3983                                     int cw_min, int cw_max, int burst_time)
3984 {
3985         struct wpa_driver_nl80211_data *drv = priv;
3986         struct nl_msg *msg;
3987         struct nlattr *txq, *params;
3988
3989         msg = nlmsg_alloc();
3990         if (!msg)
3991                 return -1;
3992
3993         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3994                     0, NL80211_CMD_SET_WIPHY, 0);
3995
3996         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3997
3998         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3999         if (!txq)
4000                 goto nla_put_failure;
4001
4002         /* We are only sending parameters for a single TXQ at a time */
4003         params = nla_nest_start(msg, 1);
4004         if (!params)
4005                 goto nla_put_failure;
4006
4007         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4008         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4009          * 32 usec, so need to convert the value here. */
4010         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4011         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4012         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4013         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4014
4015         nla_nest_end(msg, params);
4016
4017         nla_nest_end(msg, txq);
4018
4019         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4020                 return 0;
4021  nla_put_failure:
4022         return -1;
4023 }
4024
4025
4026 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4027 {
4028         struct wpa_driver_nl80211_data *drv = priv;
4029         struct nl_msg *msg;
4030
4031         msg = nlmsg_alloc();
4032         if (!msg)
4033                 return -ENOMEM;
4034
4035         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4036                     NL80211_CMD_SET_BSS, 0);
4037
4038         if (cts >= 0)
4039                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4040         if (preamble >= 0)
4041                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4042         if (slot >= 0)
4043                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4044
4045         /* TODO: multi-BSS support */
4046         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4047
4048         return send_and_recv_msgs(drv, msg, NULL, NULL);
4049  nla_put_failure:
4050         return -ENOBUFS;
4051 }
4052
4053
4054 static int i802_set_cts_protect(void *priv, int value)
4055 {
4056         return i802_set_bss(priv, value, -1, -1);
4057 }
4058
4059
4060 static int i802_set_preamble(void *priv, int value)
4061 {
4062         return i802_set_bss(priv, -1, value, -1);
4063 }
4064
4065
4066 static int i802_set_short_slot_time(void *priv, int value)
4067 {
4068         return i802_set_bss(priv, -1, -1, value);
4069 }
4070
4071
4072 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4073                              const char *ifname, int vlan_id)
4074 {
4075         struct wpa_driver_nl80211_data *drv = priv;
4076         struct nl_msg *msg;
4077
4078         msg = nlmsg_alloc();
4079         if (!msg)
4080                 return -ENOMEM;
4081
4082         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4083                     0, NL80211_CMD_SET_STATION, 0);
4084
4085         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4086                     if_nametoindex(drv->ifname));
4087         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4088         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4089                     if_nametoindex(ifname));
4090
4091         return send_and_recv_msgs(drv, msg, NULL, NULL);
4092  nla_put_failure:
4093         return -ENOBUFS;
4094 }
4095
4096
4097 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4098 {
4099         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4100         struct sockaddr_ll lladdr;
4101         unsigned char buf[3000];
4102         int len;
4103         socklen_t fromlen = sizeof(lladdr);
4104
4105         len = recvfrom(sock, buf, sizeof(buf), 0,
4106                        (struct sockaddr *)&lladdr, &fromlen);
4107         if (len < 0) {
4108                 perror("recv");
4109                 return;
4110         }
4111
4112         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4113                 void *ctx;
4114                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4115                 if (!ctx)
4116                         return;
4117                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4118         }
4119 }
4120
4121
4122 static int i802_get_inact_sec(void *priv, const u8 *addr)
4123 {
4124         struct hostap_sta_driver_data data;
4125         int ret;
4126
4127         data.inactive_msec = (unsigned long) -1;
4128         ret = i802_read_sta_data(priv, &data, addr);
4129         if (ret || data.inactive_msec == (unsigned long) -1)
4130                 return -1;
4131         return data.inactive_msec / 1000;
4132 }
4133
4134
4135 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4136 {
4137 #if 0
4138         /* TODO */
4139 #endif
4140         return 0;
4141 }
4142
4143
4144 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4145                            int reason)
4146 {
4147         struct wpa_driver_nl80211_data *drv = priv;
4148         struct ieee80211_mgmt mgmt;
4149
4150         memset(&mgmt, 0, sizeof(mgmt));
4151         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4152                                           WLAN_FC_STYPE_DEAUTH);
4153         memcpy(mgmt.da, addr, ETH_ALEN);
4154         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4155         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4156         mgmt.u.deauth.reason_code = host_to_le16(reason);
4157         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4158                                             IEEE80211_HDRLEN +
4159                                             sizeof(mgmt.u.deauth));
4160 }
4161
4162
4163 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4164                              int reason)
4165 {
4166         struct wpa_driver_nl80211_data *drv = priv;
4167         struct ieee80211_mgmt mgmt;
4168
4169         memset(&mgmt, 0, sizeof(mgmt));
4170         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4171                                           WLAN_FC_STYPE_DISASSOC);
4172         memcpy(mgmt.da, addr, ETH_ALEN);
4173         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4174         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4175         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4176         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4177                                             IEEE80211_HDRLEN +
4178                                             sizeof(mgmt.u.disassoc));
4179 }
4180
4181
4182 static void *i802_init(struct hostapd_data *hapd,
4183                        struct wpa_init_params *params)
4184 {
4185         struct wpa_driver_nl80211_data *drv;
4186         size_t i;
4187
4188         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4189         if (drv == NULL)
4190                 return NULL;
4191
4192         drv->bss.ifindex = drv->ifindex;
4193
4194         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4195         drv->if_indices = drv->default_if_indices;
4196         for (i = 0; i < params->num_bridge; i++) {
4197                 if (params->bridge[i])
4198                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4199         }
4200
4201         /* start listening for EAPOL on the default AP interface */
4202         add_ifidx(drv, drv->ifindex);
4203
4204         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4205                 goto failed;
4206
4207         if (params->bssid) {
4208                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4209                         goto failed;
4210         }
4211
4212         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
4213                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4214                            "into AP mode", drv->ifname);
4215                 goto failed;
4216         }
4217
4218         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4219                 goto failed;
4220
4221         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4222         if (drv->eapol_sock < 0) {
4223                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4224                 goto failed;
4225         }
4226
4227         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4228         {
4229                 printf("Could not register read socket for eapol\n");
4230                 goto failed;
4231         }
4232
4233         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4234                 goto failed;
4235
4236         return drv;
4237
4238 failed:
4239         nl80211_remove_monitor_interface(drv);
4240         if (drv->ioctl_sock >= 0)
4241                 close(drv->ioctl_sock);
4242
4243         genl_family_put(drv->nl80211);
4244         nl_cache_free(drv->nl_cache);
4245         nl_handle_destroy(drv->nl_handle);
4246         nl_cb_put(drv->nl_cb);
4247
4248         os_free(drv);
4249         return NULL;
4250 }
4251
4252
4253 static void i802_deinit(void *priv)
4254 {
4255         wpa_driver_nl80211_deinit(priv);
4256 }
4257
4258 #endif /* HOSTAPD */
4259
4260
4261 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4262         enum wpa_driver_if_type type)
4263 {
4264         switch (type) {
4265         case WPA_IF_STATION:
4266                 return NL80211_IFTYPE_STATION;
4267         case WPA_IF_AP_VLAN:
4268                 return NL80211_IFTYPE_AP_VLAN;
4269         case WPA_IF_AP_BSS:
4270                 return NL80211_IFTYPE_AP;
4271         }
4272         return -1;
4273 }
4274
4275
4276 static int wpa_driver_nl80211_if_add(const char *iface, void *priv,
4277                                      enum wpa_driver_if_type type,
4278                                      const char *ifname, const u8 *addr,
4279                                      void *bss_ctx)
4280 {
4281         struct wpa_driver_nl80211_data *drv = priv;
4282         int ifidx;
4283 #ifdef HOSTAPD
4284         struct i802_bss *bss = NULL;
4285
4286         if (type == WPA_IF_AP_BSS) {
4287                 bss = os_zalloc(sizeof(*bss));
4288                 if (bss == NULL)
4289                         return -1;
4290         }
4291 #endif /* HOSTAPD */
4292
4293         ifidx = nl80211_create_iface(drv, ifname,
4294                                      wpa_driver_nl80211_if_type(type), addr);
4295         if (ifidx < 0) {
4296 #ifdef HOSTAPD
4297                 os_free(bss);
4298 #endif /* HOSTAPD */
4299                 return -1;
4300         }
4301
4302 #ifdef HOSTAPD
4303         if (type == WPA_IF_AP_BSS) {
4304                 if (hostapd_set_iface_flags(priv, ifname, 1)) {
4305                         nl80211_remove_iface(priv, ifidx);
4306                         os_free(bss);
4307                         return -1;
4308                 }
4309                 bss->ifindex = ifidx;
4310                 bss->next = drv->bss.next;
4311                 drv->bss.next = bss;
4312         }
4313 #endif /* HOSTAPD */
4314
4315         return 0;
4316 }
4317
4318
4319 static int wpa_driver_nl80211_if_remove(void *priv,
4320                                         enum wpa_driver_if_type type,
4321                                         const char *ifname)
4322 {
4323         struct wpa_driver_nl80211_data *drv = priv;
4324         int ifindex = if_nametoindex(ifname);
4325
4326         nl80211_remove_iface(drv, ifindex);
4327
4328 #ifdef HOSTAPD
4329         if (type == WPA_IF_AP_BSS) {
4330                 struct i802_bss *bss, *prev;
4331                 prev = &drv->bss;
4332                 bss = drv->bss.next;
4333                 while (bss) {
4334                         if (ifindex == bss->ifindex) {
4335                                 prev->next = bss->next;
4336                                 os_free(bss);
4337                                 break;
4338                         }
4339                         prev = bss;
4340                         bss = bss->next;
4341                 }
4342         }
4343 #endif /* HOSTAPD */
4344
4345         return 0;
4346 }
4347
4348
4349 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4350         .name = "nl80211",
4351         .desc = "Linux nl80211/cfg80211",
4352         .get_bssid = wpa_driver_nl80211_get_bssid,
4353         .get_ssid = wpa_driver_nl80211_get_ssid,
4354         .set_key = wpa_driver_nl80211_set_key,
4355         .scan2 = wpa_driver_nl80211_scan,
4356         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4357         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4358         .disassociate = wpa_driver_nl80211_disassociate,
4359         .authenticate = wpa_driver_nl80211_authenticate,
4360         .associate = wpa_driver_nl80211_associate,
4361         .init = wpa_driver_nl80211_init,
4362         .deinit = wpa_driver_nl80211_deinit,
4363         .get_capa = wpa_driver_nl80211_get_capa,
4364         .set_operstate = wpa_driver_nl80211_set_operstate,
4365         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4366         .set_country = wpa_driver_nl80211_set_country,
4367         .set_beacon = wpa_driver_nl80211_set_beacon,
4368         .if_add = wpa_driver_nl80211_if_add,
4369         .if_remove = wpa_driver_nl80211_if_remove,
4370         .send_mlme = wpa_driver_nl80211_send_mlme,
4371         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4372         .sta_add = wpa_driver_nl80211_sta_add,
4373         .sta_remove = wpa_driver_nl80211_sta_remove,
4374         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4375         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4376 #ifdef HOSTAPD
4377         .hapd_init = i802_init,
4378         .hapd_deinit = i802_deinit,
4379         .get_seqnum = i802_get_seqnum,
4380         .flush = i802_flush,
4381         .read_sta_data = i802_read_sta_data,
4382         .sta_deauth = i802_sta_deauth,
4383         .sta_disassoc = i802_sta_disassoc,
4384         .get_inact_sec = i802_get_inact_sec,
4385         .sta_clear_stats = i802_sta_clear_stats,
4386         .set_freq = i802_set_freq,
4387         .set_rts = i802_set_rts,
4388         .set_frag = i802_set_frag,
4389         .set_rate_sets = i802_set_rate_sets,
4390         .set_cts_protect = i802_set_cts_protect,
4391         .set_preamble = i802_set_preamble,
4392         .set_short_slot_time = i802_set_short_slot_time,
4393         .set_tx_queue_params = i802_set_tx_queue_params,
4394         .set_sta_vlan = i802_set_sta_vlan,
4395 #endif /* HOSTAPD */
4396 };