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