src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2010, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009-2010, 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.h>
  22 #include <netlink/genl/genl.h>
  23 #include <netlink/genl/family.h>
  24 #include <netlink/genl/ctrl.h>
  25 #include <netpacket/packet.h>
  26 #include <linux/filter.h>
  27 #include "nl80211_copy.h"
  28
  29 #include "common.h"
  30 #include "eloop.h"
  31 #include "common/ieee802_11_defs.h"
  32 #include "netlink.h"
  33 #include "linux_ioctl.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         char brname[IFNAMSIZ];
  72         int ifindex;
  73         int if_removed;
  74         struct wpa_driver_capa capa;
  75         int has_capability;
  76
  77         int operstate;
  78
  79         int scan_complete_events;
  80
  81         struct nl_handle *nl_handle;
  82         struct nl_handle *nl_handle_event;
  83         struct nl_cache *nl_cache;
  84         struct nl_cache *nl_cache_event;
  85         struct nl_cb *nl_cb;
  86         struct genl_family *nl80211;
  87
  88         u8 auth_bssid[ETH_ALEN];
  89         u8 bssid[ETH_ALEN];
  90         int associated;
  91         u8 ssid[32];
  92         size_t ssid_len;
  93         int nlmode;
  94         int ap_scan_as_station;
  95         unsigned int assoc_freq;
  96
  97         int monitor_sock;
  98         int monitor_ifidx;
  99         int probe_req_report;
 100         int disable_11b_rates;
 101
 102         unsigned int beacon_set:1;
 103         unsigned int pending_remain_on_chan:1;
 104         unsigned int pending_send_action:1;
 105         unsigned int added_bridge:1;
 106         unsigned int added_if_into_bridge:1;
 107
 108         u64 remain_on_chan_cookie;
 109         u64 send_action_cookie;
 110
 111 #ifdef HOSTAPD
 112         int eapol_sock; /* socket for EAPOL frames */
 113
 114         int default_if_indices[16];
 115         int *if_indices;
 116         int num_if_indices;
 117
 118         struct i802_bss bss;
 119
 120         int last_freq;
 121         int last_freq_ht;
 122 #endif /* HOSTAPD */
 123 };
 124
 125
 126 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 127                                             void *timeout_ctx);
 128 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 129 static int
 130 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 131 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 132                                    const u8 *addr, int cmd, u16 reason_code);
 133 static void nl80211_remove_monitor_interface(
 134         struct wpa_driver_nl80211_data *drv);
 135
 136 #ifdef HOSTAPD
 137 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 138 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 139 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 140                                  int ifindex);
 141 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 142 static int wpa_driver_nl80211_if_remove(void *priv,
 143                                         enum wpa_driver_if_type type,
 144                                         const char *ifname);
 145 #endif /* HOSTAPD */
 146
 147 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
 148                                                         void *timeout_ctx);
 149 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
 150                                      int ifindex, int disabled);
 151
 152
 153 /* nl80211 code */
 154 static int ack_handler(struct nl_msg *msg, void *arg)
 155 {
 156         int *err = arg;
 157         *err = 0;
 158         return NL_STOP;
 159 }
 160
 161 static int finish_handler(struct nl_msg *msg, void *arg)
 162 {
 163         int *ret = arg;
 164         *ret = 0;
 165         return NL_SKIP;
 166 }
 167
 168 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 169                          void *arg)
 170 {
 171         int *ret = arg;
 172         *ret = err->error;
 173         return NL_SKIP;
 174 }
 175
 176
 177 static int no_seq_check(struct nl_msg *msg, void *arg)
 178 {
 179         return NL_OK;
 180 }
 181
 182
 183 static int send_and_recv(struct wpa_driver_nl80211_data *drv,
 184                          struct nl_handle *nl_handle, struct nl_msg *msg,
 185                          int (*valid_handler)(struct nl_msg *, void *),
 186                          void *valid_data)
 187 {
 188         struct nl_cb *cb;
 189         int err = -ENOMEM;
 190
 191         cb = nl_cb_clone(drv->nl_cb);
 192         if (!cb)
 193                 goto out;
 194
 195         err = nl_send_auto_complete(nl_handle, msg);
 196         if (err < 0)
 197                 goto out;
 198
 199         err = 1;
 200
 201         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 202         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 203         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 204
 205         if (valid_handler)
 206                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 207                           valid_handler, valid_data);
 208
 209         while (err > 0)
 210                 nl_recvmsgs(nl_handle, cb);
 211  out:
 212         nl_cb_put(cb);
 213         nlmsg_free(msg);
 214         return err;
 215 }
 216
 217
 218 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 219                               struct nl_msg *msg,
 220                               int (*valid_handler)(struct nl_msg *, void *),
 221                               void *valid_data)
 222 {
 223         return send_and_recv(drv, drv->nl_handle, msg, valid_handler,
 224                              valid_data);
 225 }
 226
 227
 228 struct family_data {
 229         const char *group;
 230         int id;
 231 };
 232
 233
 234 static int family_handler(struct nl_msg *msg, void *arg)
 235 {
 236         struct family_data *res = arg;
 237         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 238         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 239         struct nlattr *mcgrp;
 240         int i;
 241
 242         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 243                   genlmsg_attrlen(gnlh, 0), NULL);
 244         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 245                 return NL_SKIP;
 246
 247         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 248                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 249                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 250                           nla_len(mcgrp), NULL);
 251                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 252                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 253                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 254                                res->group,
 255                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 256                         continue;
 257                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 258                 break;
 259         };
 260
 261         return NL_SKIP;
 262 }
 263
 264
 265 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 266                                const char *family, const char *group)
 267 {
 268         struct nl_msg *msg;
 269         int ret = -1;
 270         struct family_data res = { group, -ENOENT };
 271
 272         msg = nlmsg_alloc();
 273         if (!msg)
 274                 return -ENOMEM;
 275         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 276                     0, 0, CTRL_CMD_GETFAMILY, 0);
 277         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 278
 279         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 280         msg = NULL;
 281         if (ret == 0)
 282                 ret = res.id;
 283
 284 nla_put_failure:
 285         nlmsg_free(msg);
 286         return ret;
 287 }
 288
 289
 290 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 291 {
 292         struct wpa_driver_nl80211_data *drv = priv;
 293         if (!drv->associated)
 294                 return -1;
 295         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 296         return 0;
 297 }
 298
 299
 300 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 301 {
 302         struct wpa_driver_nl80211_data *drv = priv;
 303         if (!drv->associated)
 304                 return -1;
 305         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 306         return drv->ssid_len;
 307 }
 308
 309
 310 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 311                                           char *buf, size_t len, int del)
 312 {
 313         union wpa_event_data event;
 314
 315         os_memset(&event, 0, sizeof(event));
 316         if (len > sizeof(event.interface_status.ifname))
 317                 len = sizeof(event.interface_status.ifname) - 1;
 318         os_memcpy(event.interface_status.ifname, buf, len);
 319         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 320                 EVENT_INTERFACE_ADDED;
 321
 322         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 323                    del ? "DEL" : "NEW",
 324                    event.interface_status.ifname,
 325                    del ? "removed" : "added");
 326
 327         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 328                 if (del)
 329                         drv->if_removed = 1;
 330                 else
 331                         drv->if_removed = 0;
 332         }
 333
 334         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 335 }
 336
 337
 338 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 339                                          u8 *buf, size_t len)
 340 {
 341         int attrlen, rta_len;
 342         struct rtattr *attr;
 343
 344         attrlen = len;
 345         attr = (struct rtattr *) buf;
 346
 347         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 348         while (RTA_OK(attr, attrlen)) {
 349                 if (attr->rta_type == IFLA_IFNAME) {
 350                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 351                             == 0)
 352                                 return 1;
 353                         else
 354                                 break;
 355                 }
 356                 attr = RTA_NEXT(attr, attrlen);
 357         }
 358
 359         return 0;
 360 }
 361
 362
 363 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 364                                           int ifindex, u8 *buf, size_t len)
 365 {
 366         if (drv->ifindex == ifindex)
 367                 return 1;
 368
 369         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 370                 drv->ifindex = if_nametoindex(drv->ifname);
 371                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 372                            "interface");
 373                 wpa_driver_nl80211_finish_drv_init(drv);
 374                 return 1;
 375         }
 376
 377         return 0;
 378 }
 379
 380
 381 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
 382                                                  struct ifinfomsg *ifi,
 383                                                  u8 *buf, size_t len)
 384 {
 385         struct wpa_driver_nl80211_data *drv = ctx;
 386         int attrlen, rta_len;
 387         struct rtattr *attr;
 388
 389         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len)) {
 390                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 391                            ifi->ifi_index);
 392                 return;
 393         }
 394
 395         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 396                    "(%s%s%s%s)",
 397                    drv->operstate, ifi->ifi_flags,
 398                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 399                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 400                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 401                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 402         /*
 403          * Some drivers send the association event before the operup event--in
 404          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 405          * fails. This will hit us when wpa_supplicant does not need to do
 406          * IEEE 802.1X authentication
 407          */
 408         if (drv->operstate == 1 &&
 409             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 410             !(ifi->ifi_flags & IFF_RUNNING))
 411                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 412                                        -1, IF_OPER_UP);
 413
 414         attrlen = len;
 415         attr = (struct rtattr *) buf;
 416         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 417         while (RTA_OK(attr, attrlen)) {
 418                 if (attr->rta_type == IFLA_IFNAME) {
 419                         wpa_driver_nl80211_event_link(
 420                                 drv,
 421                                 ((char *) attr) + rta_len,
 422                                 attr->rta_len - rta_len, 0);
 423                 }
 424                 attr = RTA_NEXT(attr, attrlen);
 425         }
 426 }
 427
 428
 429 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
 430                                                  struct ifinfomsg *ifi,
 431                                                  u8 *buf, size_t len)
 432 {
 433         struct wpa_driver_nl80211_data *drv = ctx;
 434         int attrlen, rta_len;
 435         struct rtattr *attr;
 436
 437         attrlen = len;
 438         attr = (struct rtattr *) buf;
 439
 440         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 441         while (RTA_OK(attr, attrlen)) {
 442                 if (attr->rta_type == IFLA_IFNAME) {
 443                         wpa_driver_nl80211_event_link(
 444                                 drv,
 445                                 ((char *) attr) + rta_len,
 446                                 attr->rta_len - rta_len, 1);
 447                 }
 448                 attr = RTA_NEXT(attr, attrlen);
 449         }
 450 }
 451
 452
 453 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 454                             const u8 *frame, size_t len)
 455 {
 456         const struct ieee80211_mgmt *mgmt;
 457         union wpa_event_data event;
 458
 459         mgmt = (const struct ieee80211_mgmt *) frame;
 460         if (len < 24 + sizeof(mgmt->u.auth)) {
 461                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 462                            "frame");
 463                 return;
 464         }
 465
 466         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 467         os_memset(&event, 0, sizeof(event));
 468         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 469         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 470         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 471         if (len > 24 + sizeof(mgmt->u.auth)) {
 472                 event.auth.ies = mgmt->u.auth.variable;
 473                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 474         }
 475
 476         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 477 }
 478
 479
 480 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 481                             const u8 *frame, size_t len)
 482 {
 483         const struct ieee80211_mgmt *mgmt;
 484         union wpa_event_data event;
 485         u16 status;
 486
 487         mgmt = (const struct ieee80211_mgmt *) frame;
 488         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 489                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 490                            "frame");
 491                 return;
 492         }
 493
 494         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 495         if (status != WLAN_STATUS_SUCCESS) {
 496                 os_memset(&event, 0, sizeof(event));
 497                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 498                         event.assoc_reject.resp_ies =
 499                                 (u8 *) mgmt->u.assoc_resp.variable;
 500                         event.assoc_reject.resp_ies_len =
 501                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 502                 }
 503                 event.assoc_reject.status_code = status;
 504
 505                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 506                 return;
 507         }
 508
 509         drv->associated = 1;
 510         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 511
 512         os_memset(&event, 0, sizeof(event));
 513         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 514                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 515                 event.assoc_info.resp_ies_len =
 516                         len - 24 - sizeof(mgmt->u.assoc_resp);
 517         }
 518
 519         event.assoc_info.freq = drv->assoc_freq;
 520
 521         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 522 }
 523
 524
 525 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 526                                enum nl80211_commands cmd, struct nlattr *status,
 527                                struct nlattr *addr, struct nlattr *req_ie,
 528                                struct nlattr *resp_ie)
 529 {
 530         union wpa_event_data event;
 531
 532         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 533                 /*
 534                  * Avoid reporting two association events that would confuse
 535                  * the core code.
 536                  */
 537                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 538                            "when using userspace SME", cmd);
 539                 return;
 540         }
 541
 542         os_memset(&event, 0, sizeof(event));
 543         if (cmd == NL80211_CMD_CONNECT &&
 544             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 545                 if (resp_ie) {
 546                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 547                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 548                 }
 549                 event.assoc_reject.status_code = nla_get_u16(status);
 550                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 551                 return;
 552         }
 553
 554         drv->associated = 1;
 555         if (addr)
 556                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 557
 558         if (req_ie) {
 559                 event.assoc_info.req_ies = nla_data(req_ie);
 560                 event.assoc_info.req_ies_len = nla_len(req_ie);
 561         }
 562         if (resp_ie) {
 563                 event.assoc_info.resp_ies = nla_data(resp_ie);
 564                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 565         }
 566
 567         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 568 }
 569
 570
 571 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 572                                enum nl80211_commands cmd, struct nlattr *addr)
 573 {
 574         union wpa_event_data event;
 575         enum wpa_event_type ev;
 576
 577         if (nla_len(addr) != ETH_ALEN)
 578                 return;
 579
 580         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 581                    cmd, MAC2STR((u8 *) nla_data(addr)));
 582
 583         if (cmd == NL80211_CMD_AUTHENTICATE)
 584                 ev = EVENT_AUTH_TIMED_OUT;
 585         else if (cmd == NL80211_CMD_ASSOCIATE)
 586                 ev = EVENT_ASSOC_TIMED_OUT;
 587         else
 588                 return;
 589
 590         os_memset(&event, 0, sizeof(event));
 591         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 592         wpa_supplicant_event(drv->ctx, ev, &event);
 593 }
 594
 595
 596 static void mlme_event_action(struct wpa_driver_nl80211_data *drv,
 597                               struct nlattr *freq, const u8 *frame, size_t len)
 598 {
 599         const struct ieee80211_mgmt *mgmt;
 600         union wpa_event_data event;
 601         u16 fc, stype;
 602
 603         mgmt = (const struct ieee80211_mgmt *) frame;
 604         if (len < 24) {
 605                 wpa_printf(MSG_DEBUG, "nl80211: Too short action frame");
 606                 return;
 607         }
 608
 609         fc = le_to_host16(mgmt->frame_control);
 610         stype = WLAN_FC_GET_STYPE(fc);
 611
 612         os_memset(&event, 0, sizeof(event));
 613         event.rx_action.da = mgmt->da;
 614         event.rx_action.sa = mgmt->sa;
 615         event.rx_action.bssid = mgmt->bssid;
 616         event.rx_action.category = mgmt->u.action.category;
 617         event.rx_action.data = &mgmt->u.action.category + 1;
 618         event.rx_action.len = frame + len - event.rx_action.data;
 619         if (freq)
 620                 event.rx_action.freq = nla_get_u32(freq);
 621         wpa_supplicant_event(drv->ctx, EVENT_RX_ACTION, &event);
 622 }
 623
 624
 625 static void mlme_event_action_tx_status(struct wpa_driver_nl80211_data *drv,
 626                                         struct nlattr *cookie, const u8 *frame,
 627                                         size_t len, struct nlattr *ack)
 628 {
 629         union wpa_event_data event;
 630         const struct ieee80211_hdr *hdr;
 631         u16 fc;
 632         u64 cookie_val;
 633
 634         if (!cookie)
 635                 return;
 636
 637         cookie_val = nla_get_u64(cookie);
 638         wpa_printf(MSG_DEBUG, "nl80211: Action TX status: cookie=0%llx%s",
 639                    (long long unsigned int) cookie_val,
 640                    cookie_val == drv->send_action_cookie ?
 641                    " (match)" : " (unknown)");
 642         if (cookie_val != drv->send_action_cookie)
 643                 return;
 644
 645         hdr = (const struct ieee80211_hdr *) frame;
 646         fc = le_to_host16(hdr->frame_control);
 647
 648         os_memset(&event, 0, sizeof(event));
 649         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
 650         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
 651         event.tx_status.dst = hdr->addr1;
 652         event.tx_status.data = frame;
 653         event.tx_status.data_len = len;
 654         event.tx_status.ack = ack != NULL;
 655         wpa_supplicant_event(drv->ctx, EVENT_TX_STATUS, &event);
 656 }
 657
 658
 659 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 660                        enum nl80211_commands cmd, struct nlattr *frame,
 661                        struct nlattr *addr, struct nlattr *timed_out,
 662                        struct nlattr *freq, struct nlattr *ack,
 663                        struct nlattr *cookie)
 664 {
 665         if (timed_out && addr) {
 666                 mlme_timeout_event(drv, cmd, addr);
 667                 return;
 668         }
 669
 670         if (frame == NULL) {
 671                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 672                            "data", cmd);
 673                 return;
 674         }
 675
 676         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 677         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 678                     nla_data(frame), nla_len(frame));
 679
 680         switch (cmd) {
 681         case NL80211_CMD_AUTHENTICATE:
 682                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 683                 break;
 684         case NL80211_CMD_ASSOCIATE:
 685                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 686                 break;
 687         case NL80211_CMD_DEAUTHENTICATE:
 688                 drv->associated = 0;
 689                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 690                 break;
 691         case NL80211_CMD_DISASSOCIATE:
 692                 drv->associated = 0;
 693                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 694                 break;
 695         case NL80211_CMD_ACTION:
 696                 mlme_event_action(drv, freq, nla_data(frame), nla_len(frame));
 697                 break;
 698         case NL80211_CMD_ACTION_TX_STATUS:
 699                 mlme_event_action_tx_status(drv, cookie, nla_data(frame),
 700                                             nla_len(frame), ack);
 701                 break;
 702         default:
 703                 break;
 704         }
 705 }
 706
 707
 708 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 709                                            struct nlattr *tb[])
 710 {
 711         union wpa_event_data data;
 712
 713         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 714         os_memset(&data, 0, sizeof(data));
 715         if (tb[NL80211_ATTR_MAC]) {
 716                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 717                             nla_data(tb[NL80211_ATTR_MAC]),
 718                             nla_len(tb[NL80211_ATTR_MAC]));
 719                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 720         }
 721         if (tb[NL80211_ATTR_KEY_SEQ]) {
 722                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 723                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 724                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 725         }
 726         if (tb[NL80211_ATTR_KEY_TYPE]) {
 727                 enum nl80211_key_type key_type =
 728                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 729                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 730                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 731                         data.michael_mic_failure.unicast = 1;
 732         } else
 733                 data.michael_mic_failure.unicast = 1;
 734
 735         if (tb[NL80211_ATTR_KEY_IDX]) {
 736                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 737                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 738         }
 739
 740         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 741 }
 742
 743
 744 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 745                                  struct nlattr *tb[])
 746 {
 747         if (tb[NL80211_ATTR_MAC] == NULL) {
 748                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 749                            "event");
 750                 return;
 751         }
 752         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 753         drv->associated = 1;
 754         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 755                    MAC2STR(drv->bssid));
 756
 757         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 758 }
 759
 760
 761 static void mlme_event_remain_on_channel(struct wpa_driver_nl80211_data *drv,
 762                                          int cancel_event, struct nlattr *tb[])
 763 {
 764         unsigned int freq, chan_type, duration;
 765         union wpa_event_data data;
 766         u64 cookie;
 767
 768         if (tb[NL80211_ATTR_WIPHY_FREQ])
 769                 freq = nla_get_u32(tb[NL80211_ATTR_WIPHY_FREQ]);
 770         else
 771                 freq = 0;
 772
 773         if (tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE])
 774                 chan_type = nla_get_u32(tb[NL80211_ATTR_WIPHY_CHANNEL_TYPE]);
 775         else
 776                 chan_type = 0;
 777
 778         if (tb[NL80211_ATTR_DURATION])
 779                 duration = nla_get_u32(tb[NL80211_ATTR_DURATION]);
 780         else
 781                 duration = 0;
 782
 783         if (tb[NL80211_ATTR_COOKIE])
 784                 cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
 785         else
 786                 cookie = 0;
 787
 788         wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel event (cancel=%d "
 789                    "freq=%u channel_type=%u duration=%u cookie=0x%llx (%s))",
 790                    cancel_event, freq, chan_type, duration,
 791                    (long long unsigned int) cookie,
 792                    cookie == drv->remain_on_chan_cookie ? "match" : "unknown");
 793
 794         if (cookie != drv->remain_on_chan_cookie)
 795                 return; /* not for us */
 796
 797         drv->pending_remain_on_chan = !cancel_event;
 798
 799         os_memset(&data, 0, sizeof(data));
 800         data.remain_on_channel.freq = freq;
 801         data.remain_on_channel.duration = duration;
 802         wpa_supplicant_event(drv->ctx, cancel_event ?
 803                              EVENT_CANCEL_REMAIN_ON_CHANNEL :
 804                              EVENT_REMAIN_ON_CHANNEL, &data);
 805 }
 806
 807
 808 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
 809                             struct nlattr *tb[])
 810 {
 811         union wpa_event_data event;
 812         struct nlattr *nl;
 813         int rem;
 814         struct scan_info *info;
 815 #define MAX_REPORT_FREQS 50
 816         int freqs[MAX_REPORT_FREQS];
 817         int num_freqs = 0;
 818
 819         os_memset(&event, 0, sizeof(event));
 820         info = &event.scan_info;
 821         info->aborted = aborted;
 822
 823         if (tb[NL80211_ATTR_SCAN_SSIDS]) {
 824                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
 825                         struct wpa_driver_scan_ssid *s =
 826                                 &info->ssids[info->num_ssids];
 827                         s->ssid = nla_data(nl);
 828                         s->ssid_len = nla_len(nl);
 829                         info->num_ssids++;
 830                         if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
 831                                 break;
 832                 }
 833         }
 834         if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
 835                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
 836                 {
 837                         freqs[num_freqs] = nla_get_u32(nl);
 838                         num_freqs++;
 839                         if (num_freqs == MAX_REPORT_FREQS - 1)
 840                                 break;
 841                 }
 842                 info->freqs = freqs;
 843                 info->num_freqs = num_freqs;
 844         }
 845         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
 846 }
 847
 848
 849 static int process_event(struct nl_msg *msg, void *arg)
 850 {
 851         struct wpa_driver_nl80211_data *drv = arg;
 852         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 853         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 854
 855         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 856                   genlmsg_attrlen(gnlh, 0), NULL);
 857
 858         if (tb[NL80211_ATTR_IFINDEX]) {
 859                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 860                 if (ifindex != drv->ifindex) {
 861                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 862                                    " for foreign interface (ifindex %d)",
 863                                    gnlh->cmd, ifindex);
 864                         return NL_SKIP;
 865                 }
 866         }
 867
 868         if (drv->ap_scan_as_station &&
 869             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 870              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 871                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 872                 drv->ap_scan_as_station = 0;
 873         }
 874
 875         switch (gnlh->cmd) {
 876         case NL80211_CMD_TRIGGER_SCAN:
 877                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 878                 break;
 879         case NL80211_CMD_NEW_SCAN_RESULTS:
 880                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 881                 drv->scan_complete_events = 1;
 882                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 883                                      drv->ctx);
 884                 send_scan_event(drv, 0, tb);
 885                 break;
 886         case NL80211_CMD_SCAN_ABORTED:
 887                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 888                 /*
 889                  * Need to indicate that scan results are available in order
 890                  * not to make wpa_supplicant stop its scanning.
 891                  */
 892                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 893                                      drv->ctx);
 894                 send_scan_event(drv, 1, tb);
 895                 break;
 896         case NL80211_CMD_AUTHENTICATE:
 897         case NL80211_CMD_ASSOCIATE:
 898         case NL80211_CMD_DEAUTHENTICATE:
 899         case NL80211_CMD_DISASSOCIATE:
 900         case NL80211_CMD_ACTION:
 901         case NL80211_CMD_ACTION_TX_STATUS:
 902                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 903                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT],
 904                            tb[NL80211_ATTR_WIPHY_FREQ], tb[NL80211_ATTR_ACK],
 905                            tb[NL80211_ATTR_COOKIE]);
 906                 break;
 907         case NL80211_CMD_CONNECT:
 908         case NL80211_CMD_ROAM:
 909                 mlme_event_connect(drv, gnlh->cmd,
 910                                    tb[NL80211_ATTR_STATUS_CODE],
 911                                    tb[NL80211_ATTR_MAC],
 912                                    tb[NL80211_ATTR_REQ_IE],
 913                                    tb[NL80211_ATTR_RESP_IE]);
 914                 break;
 915         case NL80211_CMD_DISCONNECT:
 916                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 917                         /*
 918                          * Avoid reporting two disassociation events that could
 919                          * confuse the core code.
 920                          */
 921                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 922                                    "event when using userspace SME");
 923                         break;
 924                 }
 925                 drv->associated = 0;
 926                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 927                 break;
 928         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 929                 mlme_event_michael_mic_failure(drv, tb);
 930                 break;
 931         case NL80211_CMD_JOIN_IBSS:
 932                 mlme_event_join_ibss(drv, tb);
 933                 break;
 934         case NL80211_CMD_REMAIN_ON_CHANNEL:
 935                 mlme_event_remain_on_channel(drv, 0, tb);
 936                 break;
 937         case NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL:
 938                 mlme_event_remain_on_channel(drv, 1, tb);
 939                 break;
 940         default:
 941                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 942                            "(cmd=%d)", gnlh->cmd);
 943                 break;
 944         }
 945
 946         return NL_SKIP;
 947 }
 948
 949
 950 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 951                                              void *sock_ctx)
 952 {
 953         struct nl_cb *cb;
 954         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 955
 956         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 957
 958         cb = nl_cb_clone(drv->nl_cb);
 959         if (!cb)
 960                 return;
 961         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 962         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 963         nl_recvmsgs(drv->nl_handle_event, cb);
 964         nl_cb_put(cb);
 965 }
 966
 967
 968 /**
 969  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 970  * @priv: driver_nl80211 private data
 971  * @alpha2_arg: country to which to switch to
 972  * Returns: 0 on success, -1 on failure
 973  *
 974  * This asks nl80211 to set the regulatory domain for given
 975  * country ISO / IEC alpha2.
 976  */
 977 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 978 {
 979         struct wpa_driver_nl80211_data *drv = priv;
 980         char alpha2[3];
 981         struct nl_msg *msg;
 982
 983         msg = nlmsg_alloc();
 984         if (!msg)
 985                 return -ENOMEM;
 986
 987         alpha2[0] = alpha2_arg[0];
 988         alpha2[1] = alpha2_arg[1];
 989         alpha2[2] = '\0';
 990
 991         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 992                     0, NL80211_CMD_REQ_SET_REG, 0);
 993
 994         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 995         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 996                 return -EINVAL;
 997         return 0;
 998 nla_put_failure:
 999         return -EINVAL;
1000 }
1001
1002
1003 #ifndef HOSTAPD
1004 struct wiphy_info_data {
1005         int max_scan_ssids;
1006         int ap_supported;
1007         int auth_supported;
1008         int connect_supported;
1009 };
1010
1011
1012 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1013 {
1014         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1015         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1016         struct wiphy_info_data *info = arg;
1017
1018         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1019                   genlmsg_attrlen(gnlh, 0), NULL);
1020
1021         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1022                 info->max_scan_ssids =
1023                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1024
1025         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1026                 struct nlattr *nl_mode;
1027                 int i;
1028                 nla_for_each_nested(nl_mode,
1029                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1030                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1031                                 info->ap_supported = 1;
1032                                 break;
1033                         }
1034                 }
1035         }
1036
1037         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1038                 struct nlattr *nl_cmd;
1039                 int i;
1040
1041                 nla_for_each_nested(nl_cmd,
1042                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1043                         u32 cmd = nla_get_u32(nl_cmd);
1044                         if (cmd == NL80211_CMD_AUTHENTICATE)
1045                                 info->auth_supported = 1;
1046                         else if (cmd == NL80211_CMD_CONNECT)
1047                                 info->connect_supported = 1;
1048                 }
1049         }
1050
1051         return NL_SKIP;
1052 }
1053
1054
1055 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1056                                        struct wiphy_info_data *info)
1057 {
1058         struct nl_msg *msg;
1059
1060         os_memset(info, 0, sizeof(*info));
1061         msg = nlmsg_alloc();
1062         if (!msg)
1063                 return -1;
1064
1065         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1066                     0, NL80211_CMD_GET_WIPHY, 0);
1067
1068         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1069
1070         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1071                 return 0;
1072         msg = NULL;
1073 nla_put_failure:
1074         nlmsg_free(msg);
1075         return -1;
1076 }
1077
1078
1079 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1080 {
1081         struct wiphy_info_data info;
1082         if (wpa_driver_nl80211_get_info(drv, &info))
1083                 return -1;
1084         drv->has_capability = 1;
1085         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1086         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1087                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1088                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1089                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1090         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1091                 WPA_DRIVER_CAPA_ENC_WEP104 |
1092                 WPA_DRIVER_CAPA_ENC_TKIP |
1093                 WPA_DRIVER_CAPA_ENC_CCMP;
1094         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1095                 WPA_DRIVER_AUTH_SHARED |
1096                 WPA_DRIVER_AUTH_LEAP;
1097
1098         drv->capa.max_scan_ssids = info.max_scan_ssids;
1099         if (info.ap_supported)
1100                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1101
1102         if (info.auth_supported)
1103                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1104         else if (!info.connect_supported) {
1105                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1106                            "authentication/association or connect commands");
1107                 return -1;
1108         }
1109
1110         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1111
1112         return 0;
1113 }
1114 #endif /* HOSTAPD */
1115
1116
1117 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1118                                       void *ctx)
1119 {
1120         int ret;
1121
1122         /* Initialize generic netlink and nl80211 */
1123
1124         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1125         if (drv->nl_cb == NULL) {
1126                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1127                            "callbacks");
1128                 goto err1;
1129         }
1130
1131         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1132         if (drv->nl_handle == NULL) {
1133                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1134                            "callbacks");
1135                 goto err2;
1136         }
1137
1138         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1139         if (drv->nl_handle_event == NULL) {
1140                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1141                            "callbacks (event)");
1142                 goto err2b;
1143         }
1144
1145         if (genl_connect(drv->nl_handle)) {
1146                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1147                            "netlink");
1148                 goto err3;
1149         }
1150
1151         if (genl_connect(drv->nl_handle_event)) {
1152                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1153                            "netlink (event)");
1154                 goto err3;
1155         }
1156
1157 #ifdef CONFIG_LIBNL20
1158         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1159                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1160                            "netlink cache");
1161                 goto err3;
1162         }
1163         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1164             0) {
1165                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1166                            "netlink cache (event)");
1167                 goto err3b;
1168         }
1169 #else /* CONFIG_LIBNL20 */
1170         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1171         if (drv->nl_cache == NULL) {
1172                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1173                            "netlink cache");
1174                 goto err3;
1175         }
1176         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1177         if (drv->nl_cache_event == NULL) {
1178                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1179                            "netlink cache (event)");
1180                 goto err3b;
1181         }
1182 #endif /* CONFIG_LIBNL20 */
1183
1184         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1185         if (drv->nl80211 == NULL) {
1186                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1187                            "found");
1188                 goto err4;
1189         }
1190
1191         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1192         if (ret >= 0)
1193                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1194         if (ret < 0) {
1195                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1196                            "membership for scan events: %d (%s)",
1197                            ret, strerror(-ret));
1198                 goto err4;
1199         }
1200
1201         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1202         if (ret >= 0)
1203                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1204         if (ret < 0) {
1205                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1206                            "membership for mlme events: %d (%s)",
1207                            ret, strerror(-ret));
1208                 goto err4;
1209         }
1210
1211         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1212                                  wpa_driver_nl80211_event_receive, drv, ctx);
1213
1214         return 0;
1215
1216 err4:
1217         nl_cache_free(drv->nl_cache_event);
1218 err3b:
1219         nl_cache_free(drv->nl_cache);
1220 err3:
1221         nl_handle_destroy(drv->nl_handle_event);
1222 err2b:
1223         nl_handle_destroy(drv->nl_handle);
1224 err2:
1225         nl_cb_put(drv->nl_cb);
1226 err1:
1227         return -1;
1228 }
1229
1230
1231 /**
1232  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1233  * @ctx: context to be used when calling wpa_supplicant functions,
1234  * e.g., wpa_supplicant_event()
1235  * @ifname: interface name, e.g., wlan0
1236  * Returns: Pointer to private data, %NULL on failure
1237  */
1238 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1239 {
1240         struct wpa_driver_nl80211_data *drv;
1241         struct netlink_config *cfg;
1242
1243         drv = os_zalloc(sizeof(*drv));
1244         if (drv == NULL)
1245                 return NULL;
1246         drv->ctx = ctx;
1247         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1248         drv->monitor_ifidx = -1;
1249         drv->monitor_sock = -1;
1250         drv->ioctl_sock = -1;
1251
1252         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1253                 os_free(drv);
1254                 return NULL;
1255         }
1256
1257         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1258         if (drv->ioctl_sock < 0) {
1259                 perror("socket(PF_INET,SOCK_DGRAM)");
1260                 goto failed;
1261         }
1262
1263         cfg = os_zalloc(sizeof(*cfg));
1264         if (cfg == NULL)
1265                 goto failed;
1266         cfg->ctx = drv;
1267         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1268         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1269         drv->netlink = netlink_init(cfg);
1270         if (drv->netlink == NULL) {
1271                 os_free(cfg);
1272                 goto failed;
1273         }
1274         if (wpa_driver_nl80211_finish_drv_init(drv))
1275                 goto failed;
1276
1277         return drv;
1278
1279 failed:
1280         netlink_deinit(drv->netlink);
1281         if (drv->ioctl_sock >= 0)
1282                 close(drv->ioctl_sock);
1283
1284         genl_family_put(drv->nl80211);
1285         nl_cache_free(drv->nl_cache);
1286         nl_handle_destroy(drv->nl_handle);
1287         nl_cb_put(drv->nl_cb);
1288
1289         os_free(drv);
1290         return NULL;
1291 }
1292
1293
1294 static int nl80211_register_action_frame(struct wpa_driver_nl80211_data *drv,
1295                                          const u8 *match, size_t match_len)
1296 {
1297         struct nl_msg *msg;
1298         int ret = -1;
1299
1300         msg = nlmsg_alloc();
1301         if (!msg)
1302                 return -1;
1303
1304         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1305                     NL80211_CMD_REGISTER_ACTION, 0);
1306
1307         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1308         NLA_PUT(msg, NL80211_ATTR_FRAME_MATCH, match_len, match);
1309
1310         ret = send_and_recv(drv, drv->nl_handle_event, msg, NULL, NULL);
1311         msg = NULL;
1312         if (ret) {
1313                 wpa_printf(MSG_DEBUG, "nl80211: Register Action command "
1314                            "failed: ret=%d (%s)", ret, strerror(-ret));
1315                 wpa_hexdump(MSG_DEBUG, "nl80211: Register Action match",
1316                             match, match_len);
1317                 goto nla_put_failure;
1318         }
1319         ret = 0;
1320 nla_put_failure:
1321         nlmsg_free(msg);
1322         return ret;
1323 }
1324
1325
1326 static int nl80211_register_action_frames(struct wpa_driver_nl80211_data *drv)
1327 {
1328         if (0) {
1329                 /* Public Action frames */
1330                 return nl80211_register_action_frame(drv, (u8 *) "\x04", 1);
1331         }
1332         return 0;
1333 }
1334
1335
1336 static int
1337 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1338 {
1339         drv->ifindex = if_nametoindex(drv->ifname);
1340
1341 #ifndef HOSTAPD
1342         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1343                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1344                            "use managed mode");
1345         }
1346
1347         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) {
1348                 wpa_printf(MSG_ERROR, "Could not set interface '%s' UP",
1349                            drv->ifname);
1350                 return -1;
1351         }
1352
1353         if (wpa_driver_nl80211_capa(drv))
1354                 return -1;
1355
1356         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1357                                1, IF_OPER_DORMANT);
1358 #endif /* HOSTAPD */
1359
1360         if (nl80211_register_action_frames(drv) < 0)
1361                 return -1;
1362
1363         return 0;
1364 }
1365
1366
1367 #ifdef HOSTAPD
1368 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1369 {
1370         struct i802_bss *bss, *prev;
1371         bss = drv->bss.next;
1372         while (bss) {
1373                 prev = bss;
1374                 bss = bss->next;
1375                 os_free(bss);
1376         }
1377 }
1378 #endif /* HOSTAPD */
1379
1380
1381 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1382 {
1383         struct nl_msg *msg;
1384
1385         msg = nlmsg_alloc();
1386         if (!msg)
1387                 return -ENOMEM;
1388
1389         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1390                     0, NL80211_CMD_DEL_BEACON, 0);
1391         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1392
1393         return send_and_recv_msgs(drv, msg, NULL, NULL);
1394  nla_put_failure:
1395         return -ENOBUFS;
1396 }
1397
1398
1399 /**
1400  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1401  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1402  *
1403  * Shut down driver interface and processing of driver events. Free
1404  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1405  */
1406 static void wpa_driver_nl80211_deinit(void *priv)
1407 {
1408         struct wpa_driver_nl80211_data *drv = priv;
1409
1410         if (drv->added_if_into_bridge) {
1411                 if (linux_br_del_if(drv->ioctl_sock, drv->brname, drv->ifname)
1412                     < 0)
1413                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1414                                    "interface %s from bridge %s: %s",
1415                                    drv->ifname, drv->brname, strerror(errno));
1416         }
1417         if (drv->added_bridge) {
1418                 if (linux_br_del(drv->ioctl_sock, drv->brname) < 0)
1419                         wpa_printf(MSG_INFO, "nl80211: Failed to remove "
1420                                    "bridge %s: %s",
1421                                    drv->brname, strerror(errno));
1422         }
1423
1424         nl80211_remove_monitor_interface(drv);
1425
1426         if (drv->nlmode == NL80211_IFTYPE_AP)
1427                 wpa_driver_nl80211_del_beacon(drv);
1428
1429 #ifdef HOSTAPD
1430         if (drv->last_freq_ht) {
1431                 /* Clear HT flags from the driver */
1432                 struct hostapd_freq_params freq;
1433                 os_memset(&freq, 0, sizeof(freq));
1434                 freq.freq = drv->last_freq;
1435                 i802_set_freq(priv, &freq);
1436         }
1437
1438         if (drv->eapol_sock >= 0) {
1439                 eloop_unregister_read_sock(drv->eapol_sock);
1440                 close(drv->eapol_sock);
1441         }
1442
1443         if (drv->if_indices != drv->default_if_indices)
1444                 os_free(drv->if_indices);
1445
1446         wpa_driver_nl80211_free_bss(drv);
1447 #endif /* HOSTAPD */
1448
1449         if (drv->disable_11b_rates)
1450                 nl80211_disable_11b_rates(drv, drv->ifindex, 0);
1451
1452         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1453         netlink_deinit(drv->netlink);
1454
1455         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1456
1457         (void) linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0);
1458         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1459
1460         if (drv->ioctl_sock >= 0)
1461                 close(drv->ioctl_sock);
1462
1463         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1464         genl_family_put(drv->nl80211);
1465         nl_cache_free(drv->nl_cache);
1466         nl_cache_free(drv->nl_cache_event);
1467         nl_handle_destroy(drv->nl_handle);
1468         nl_handle_destroy(drv->nl_handle_event);
1469         nl_cb_put(drv->nl_cb);
1470
1471         eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1472                              drv, NULL);
1473
1474         os_free(drv);
1475 }
1476
1477
1478 /**
1479  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1480  * @eloop_ctx: Driver private data
1481  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1482  *
1483  * This function can be used as registered timeout when starting a scan to
1484  * generate a scan completed event if the driver does not report this.
1485  */
1486 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1487 {
1488         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1489         if (drv->ap_scan_as_station) {
1490                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1491                 drv->ap_scan_as_station = 0;
1492         }
1493         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1494         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1495 }
1496
1497
1498 /**
1499  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1500  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1501  * @params: Scan parameters
1502  * Returns: 0 on success, -1 on failure
1503  */
1504 static int wpa_driver_nl80211_scan(void *priv,
1505                                    struct wpa_driver_scan_params *params)
1506 {
1507         struct wpa_driver_nl80211_data *drv = priv;
1508         int ret = 0, timeout;
1509         struct nl_msg *msg, *ssids, *freqs;
1510         size_t i;
1511
1512         msg = nlmsg_alloc();
1513         ssids = nlmsg_alloc();
1514         freqs = nlmsg_alloc();
1515         if (!msg || !ssids || !freqs) {
1516                 nlmsg_free(msg);
1517                 nlmsg_free(ssids);
1518                 nlmsg_free(freqs);
1519                 return -1;
1520         }
1521
1522         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1523                     NL80211_CMD_TRIGGER_SCAN, 0);
1524
1525         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1526
1527         for (i = 0; i < params->num_ssids; i++) {
1528                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1529                         params->ssids[i].ssid);
1530         }
1531         if (params->num_ssids)
1532                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1533
1534         if (params->extra_ies) {
1535                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1536                         params->extra_ies);
1537         }
1538
1539         if (params->freqs) {
1540                 for (i = 0; params->freqs[i]; i++)
1541                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1542                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1543         }
1544
1545         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1546         msg = NULL;
1547         if (ret) {
1548                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1549                            "(%s)", ret, strerror(-ret));
1550 #ifdef HOSTAPD
1551                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1552                         /*
1553                          * mac80211 does not allow scan requests in AP mode, so
1554                          * try to do this in station mode.
1555                          */
1556                         if (wpa_driver_nl80211_set_mode(drv,
1557                                                         IEEE80211_MODE_INFRA))
1558                                 goto nla_put_failure;
1559
1560                         if (wpa_driver_nl80211_scan(drv, params)) {
1561                                 wpa_driver_nl80211_set_mode(drv,
1562                                                             IEEE80211_MODE_AP);
1563                                 goto nla_put_failure;
1564                         }
1565
1566                         /* Restore AP mode when processing scan results */
1567                         drv->ap_scan_as_station = 1;
1568                         ret = 0;
1569                 } else
1570                         goto nla_put_failure;
1571 #else /* HOSTAPD */
1572                 goto nla_put_failure;
1573 #endif /* HOSTAPD */
1574         }
1575
1576         /* Not all drivers generate "scan completed" wireless event, so try to
1577          * read results after a timeout. */
1578         timeout = 10;
1579         if (drv->scan_complete_events) {
1580                 /*
1581                  * The driver seems to deliver events to notify when scan is
1582                  * complete, so use longer timeout to avoid race conditions
1583                  * with scanning and following association request.
1584                  */
1585                 timeout = 30;
1586         }
1587         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1588                    "seconds", ret, timeout);
1589         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1590         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1591                                drv, drv->ctx);
1592
1593 nla_put_failure:
1594         nlmsg_free(ssids);
1595         nlmsg_free(msg);
1596         nlmsg_free(freqs);
1597         return ret;
1598 }
1599
1600
1601 static int bss_info_handler(struct nl_msg *msg, void *arg)
1602 {
1603         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1604         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1605         struct nlattr *bss[NL80211_BSS_MAX + 1];
1606         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1607                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1608                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1609                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1610                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1611                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1612                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1613                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1614                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1615                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1616                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1617                 [NL80211_BSS_BEACON_IES] = { .type = NLA_UNSPEC },
1618         };
1619         struct wpa_scan_results *res = arg;
1620         struct wpa_scan_res **tmp;
1621         struct wpa_scan_res *r;
1622         const u8 *ie, *beacon_ie;
1623         size_t ie_len, beacon_ie_len;
1624         u8 *pos;
1625
1626         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1627                   genlmsg_attrlen(gnlh, 0), NULL);
1628         if (!tb[NL80211_ATTR_BSS])
1629                 return NL_SKIP;
1630         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1631                              bss_policy))
1632                 return NL_SKIP;
1633         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1634                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1635                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1636         } else {
1637                 ie = NULL;
1638                 ie_len = 0;
1639         }
1640         if (bss[NL80211_BSS_BEACON_IES]) {
1641                 beacon_ie = nla_data(bss[NL80211_BSS_BEACON_IES]);
1642                 beacon_ie_len = nla_len(bss[NL80211_BSS_BEACON_IES]);
1643         } else {
1644                 beacon_ie = NULL;
1645                 beacon_ie_len = 0;
1646         }
1647
1648         r = os_zalloc(sizeof(*r) + ie_len + beacon_ie_len);
1649         if (r == NULL)
1650                 return NL_SKIP;
1651         if (bss[NL80211_BSS_BSSID])
1652                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1653                           ETH_ALEN);
1654         if (bss[NL80211_BSS_FREQUENCY])
1655                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1656         if (bss[NL80211_BSS_BEACON_INTERVAL])
1657                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1658         if (bss[NL80211_BSS_CAPABILITY])
1659                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1660         r->flags |= WPA_SCAN_NOISE_INVALID;
1661         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1662                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1663                 r->level /= 100; /* mBm to dBm */
1664                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1665         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1666                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1667                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1668         } else
1669                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1670         if (bss[NL80211_BSS_TSF])
1671                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1672         if (bss[NL80211_BSS_SEEN_MS_AGO])
1673                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1674         r->ie_len = ie_len;
1675         pos = (u8 *) (r + 1);
1676         if (ie) {
1677                 os_memcpy(pos, ie, ie_len);
1678                 pos += ie_len;
1679         }
1680         r->beacon_ie_len = beacon_ie_len;
1681         if (beacon_ie)
1682                 os_memcpy(pos, beacon_ie, beacon_ie_len);
1683
1684         if (bss[NL80211_BSS_STATUS]) {
1685                 enum nl80211_bss_status status;
1686                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1687                 switch (status) {
1688                 case NL80211_BSS_STATUS_AUTHENTICATED:
1689                         r->flags |= WPA_SCAN_AUTHENTICATED;
1690                         break;
1691                 case NL80211_BSS_STATUS_ASSOCIATED:
1692                         r->flags |= WPA_SCAN_ASSOCIATED;
1693                         break;
1694                 default:
1695                         break;
1696                 }
1697         }
1698
1699         tmp = os_realloc(res->res,
1700                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1701         if (tmp == NULL) {
1702                 os_free(r);
1703                 return NL_SKIP;
1704         }
1705         tmp[res->num++] = r;
1706         res->res = tmp;
1707
1708         return NL_SKIP;
1709 }
1710
1711
1712 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1713                                  const u8 *addr)
1714 {
1715         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1716                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1717                            "mismatch (" MACSTR ")", MAC2STR(addr));
1718                 wpa_driver_nl80211_mlme(drv, addr,
1719                                         NL80211_CMD_DEAUTHENTICATE,
1720                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1721         }
1722 }
1723
1724
1725 static void wpa_driver_nl80211_check_bss_status(
1726         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1727 {
1728         size_t i;
1729
1730         for (i = 0; i < res->num; i++) {
1731                 struct wpa_scan_res *r = res->res[i];
1732                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1733                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1734                                    "indicates BSS status with " MACSTR
1735                                    " as authenticated",
1736                                    MAC2STR(r->bssid));
1737                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1738                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1739                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1740                             0) {
1741                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1742                                            " in local state (auth=" MACSTR
1743                                            " assoc=" MACSTR ")",
1744                                            MAC2STR(drv->auth_bssid),
1745                                            MAC2STR(drv->bssid));
1746                                 clear_state_mismatch(drv, r->bssid);
1747                         }
1748                 }
1749
1750                 if (r->flags & WPA_SCAN_ASSOCIATED) {
1751                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1752                                    "indicate BSS status with " MACSTR
1753                                    " as associated",
1754                                    MAC2STR(r->bssid));
1755                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1756                             !drv->associated) {
1757                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1758                                            "(not associated) does not match "
1759                                            "with BSS state");
1760                                 clear_state_mismatch(drv, r->bssid);
1761                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1762                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1763                                    0) {
1764                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1765                                            "(associated with " MACSTR ") does "
1766                                            "not match with BSS state",
1767                                            MAC2STR(drv->bssid));
1768                                 clear_state_mismatch(drv, r->bssid);
1769                                 clear_state_mismatch(drv, drv->bssid);
1770                         }
1771                 }
1772         }
1773 }
1774
1775
1776 static void wpa_scan_results_free(struct wpa_scan_results *res)
1777 {
1778         size_t i;
1779
1780         if (res == NULL)
1781                 return;
1782
1783         for (i = 0; i < res->num; i++)
1784                 os_free(res->res[i]);
1785         os_free(res->res);
1786         os_free(res);
1787 }
1788
1789
1790 static struct wpa_scan_results *
1791 nl80211_get_scan_results(struct wpa_driver_nl80211_data *drv)
1792 {
1793         struct nl_msg *msg;
1794         struct wpa_scan_results *res;
1795         int ret;
1796
1797         res = os_zalloc(sizeof(*res));
1798         if (res == NULL)
1799                 return NULL;
1800         msg = nlmsg_alloc();
1801         if (!msg)
1802                 goto nla_put_failure;
1803
1804         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1805                     NL80211_CMD_GET_SCAN, 0);
1806         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1807
1808         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1809         msg = NULL;
1810         if (ret == 0) {
1811                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1812                            (unsigned long) res->num);
1813                 return res;
1814         }
1815         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1816                    "(%s)", ret, strerror(-ret));
1817 nla_put_failure:
1818         nlmsg_free(msg);
1819         wpa_scan_results_free(res);
1820         return NULL;
1821 }
1822
1823
1824 /**
1825  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1826  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1827  * Returns: Scan results on success, -1 on failure
1828  */
1829 static struct wpa_scan_results *
1830 wpa_driver_nl80211_get_scan_results(void *priv)
1831 {
1832         struct wpa_driver_nl80211_data *drv = priv;
1833         struct wpa_scan_results *res;
1834
1835         res = nl80211_get_scan_results(drv);
1836         if (res)
1837                 wpa_driver_nl80211_check_bss_status(drv, res);
1838         return res;
1839 }
1840
1841
1842 static void nl80211_dump_scan(struct wpa_driver_nl80211_data *drv)
1843 {
1844         struct wpa_scan_results *res;
1845         size_t i;
1846
1847         res = nl80211_get_scan_results(drv);
1848         if (res == NULL) {
1849                 wpa_printf(MSG_DEBUG, "nl80211: Failed to get scan results");
1850                 return;
1851         }
1852
1853         wpa_printf(MSG_DEBUG, "nl80211: Scan result dump");
1854         for (i = 0; i < res->num; i++) {
1855                 struct wpa_scan_res *r = res->res[i];
1856                 wpa_printf(MSG_DEBUG, "nl80211: %d/%d " MACSTR "%s%s",
1857                            (int) i, (int) res->num, MAC2STR(r->bssid),
1858                            r->flags & WPA_SCAN_AUTHENTICATED ? " [auth]" : "",
1859                            r->flags & WPA_SCAN_ASSOCIATED ? " [assoc]" : "");
1860         }
1861
1862         wpa_scan_results_free(res);
1863 }
1864
1865
1866 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1867                                       enum wpa_alg alg, const u8 *addr,
1868                                       int key_idx, int set_tx,
1869                                       const u8 *seq, size_t seq_len,
1870                                       const u8 *key, size_t key_len)
1871 {
1872         struct wpa_driver_nl80211_data *drv = priv;
1873         int ifindex = if_nametoindex(ifname);
1874         struct nl_msg *msg;
1875         int ret;
1876
1877         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1878                    "set_tx=%d seq_len=%lu key_len=%lu",
1879                    __func__, ifindex, alg, addr, key_idx, set_tx,
1880                    (unsigned long) seq_len, (unsigned long) key_len);
1881
1882         msg = nlmsg_alloc();
1883         if (!msg)
1884                 return -ENOMEM;
1885
1886         if (alg == WPA_ALG_NONE) {
1887                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1888                             0, NL80211_CMD_DEL_KEY, 0);
1889         } else {
1890                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1891                             0, NL80211_CMD_NEW_KEY, 0);
1892                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1893                 switch (alg) {
1894                 case WPA_ALG_WEP:
1895                         if (key_len == 5)
1896                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1897                                             WLAN_CIPHER_SUITE_WEP40);
1898                         else
1899                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1900                                             WLAN_CIPHER_SUITE_WEP104);
1901                         break;
1902                 case WPA_ALG_TKIP:
1903                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1904                                     WLAN_CIPHER_SUITE_TKIP);
1905                         break;
1906                 case WPA_ALG_CCMP:
1907                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1908                                     WLAN_CIPHER_SUITE_CCMP);
1909                         break;
1910                 case WPA_ALG_IGTK:
1911                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1912                                     WLAN_CIPHER_SUITE_AES_CMAC);
1913                         break;
1914                 default:
1915                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1916                                    "algorithm %d", __func__, alg);
1917                         nlmsg_free(msg);
1918                         return -1;
1919                 }
1920         }
1921
1922         if (seq && seq_len)
1923                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1924
1925         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1926         {
1927                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1928                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1929         }
1930         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1931         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1932
1933         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1934         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1935                 ret = 0;
1936         if (ret)
1937                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1938                            ret, strerror(-ret));
1939
1940         /*
1941          * If we failed or don't need to set the default TX key (below),
1942          * we're done here.
1943          */
1944         if (ret || !set_tx || alg == WPA_ALG_NONE)
1945                 return ret;
1946 #ifdef HOSTAPD /* FIX: is this needed? */
1947         if (addr)
1948                 return ret;
1949 #endif /* HOSTAPD */
1950
1951         msg = nlmsg_alloc();
1952         if (!msg)
1953                 return -ENOMEM;
1954
1955         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1956                     0, NL80211_CMD_SET_KEY, 0);
1957         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1958         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1959         if (alg == WPA_ALG_IGTK)
1960                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1961         else
1962                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1963
1964         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1965         if (ret == -ENOENT)
1966                 ret = 0;
1967         if (ret)
1968                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1969                            "err=%d %s)", ret, strerror(-ret));
1970         return ret;
1971
1972 nla_put_failure:
1973         return -ENOBUFS;
1974 }
1975
1976
1977 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
1978                       int key_idx, int defkey,
1979                       const u8 *seq, size_t seq_len,
1980                       const u8 *key, size_t key_len)
1981 {
1982         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1983         if (!key_attr)
1984                 return -1;
1985
1986         if (defkey && alg == WPA_ALG_IGTK)
1987                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1988         else if (defkey)
1989                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1990
1991         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1992
1993         switch (alg) {
1994         case WPA_ALG_WEP:
1995                 if (key_len == 5)
1996                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1997                                     WLAN_CIPHER_SUITE_WEP40);
1998                 else
1999                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2000                                     WLAN_CIPHER_SUITE_WEP104);
2001                 break;
2002         case WPA_ALG_TKIP:
2003                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
2004                 break;
2005         case WPA_ALG_CCMP:
2006                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
2007                 break;
2008         case WPA_ALG_IGTK:
2009                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2010                             WLAN_CIPHER_SUITE_AES_CMAC);
2011                 break;
2012         default:
2013                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2014                            "algorithm %d", __func__, alg);
2015                 return -1;
2016         }
2017
2018         if (seq && seq_len)
2019                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
2020
2021         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
2022
2023         nla_nest_end(msg, key_attr);
2024
2025         return 0;
2026  nla_put_failure:
2027         return -1;
2028 }
2029
2030
2031 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
2032                                  struct nl_msg *msg)
2033 {
2034         int i, privacy = 0;
2035         struct nlattr *nl_keys, *nl_key;
2036
2037         for (i = 0; i < 4; i++) {
2038                 if (!params->wep_key[i])
2039                         continue;
2040                 privacy = 1;
2041                 break;
2042         }
2043         if (!privacy)
2044                 return 0;
2045
2046         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
2047
2048         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
2049         if (!nl_keys)
2050                 goto nla_put_failure;
2051
2052         for (i = 0; i < 4; i++) {
2053                 if (!params->wep_key[i])
2054                         continue;
2055
2056                 nl_key = nla_nest_start(msg, i);
2057                 if (!nl_key)
2058                         goto nla_put_failure;
2059
2060                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
2061                         params->wep_key[i]);
2062                 if (params->wep_key_len[i] == 5)
2063                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2064                                     WLAN_CIPHER_SUITE_WEP40);
2065                 else
2066                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2067                                     WLAN_CIPHER_SUITE_WEP104);
2068
2069                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2070
2071                 if (i == params->wep_tx_keyidx)
2072                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2073
2074                 nla_nest_end(msg, nl_key);
2075         }
2076         nla_nest_end(msg, nl_keys);
2077
2078         return 0;
2079
2080 nla_put_failure:
2081         return -ENOBUFS;
2082 }
2083
2084
2085 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2086                                    const u8 *addr, int cmd, u16 reason_code)
2087 {
2088         int ret = -1;
2089         struct nl_msg *msg;
2090
2091         msg = nlmsg_alloc();
2092         if (!msg)
2093                 return -1;
2094
2095         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2096
2097         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2098         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2099         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2100
2101         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2102         msg = NULL;
2103         if (ret) {
2104                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2105                            "(%s)", ret, strerror(-ret));
2106                 goto nla_put_failure;
2107         }
2108         ret = 0;
2109
2110 nla_put_failure:
2111         nlmsg_free(msg);
2112         return ret;
2113 }
2114
2115
2116 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2117                                          const u8 *addr, int reason_code)
2118 {
2119         wpa_printf(MSG_DEBUG, "%s", __func__);
2120         drv->associated = 0;
2121         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2122                                        reason_code);
2123 }
2124
2125
2126 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2127                                              int reason_code)
2128 {
2129         struct wpa_driver_nl80211_data *drv = priv;
2130         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2131                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2132         wpa_printf(MSG_DEBUG, "%s", __func__);
2133         drv->associated = 0;
2134         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2135                                        reason_code);
2136 }
2137
2138
2139 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2140                                            int reason_code)
2141 {
2142         struct wpa_driver_nl80211_data *drv = priv;
2143         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2144                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2145         wpa_printf(MSG_DEBUG, "%s", __func__);
2146         drv->associated = 0;
2147         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2148                                        reason_code);
2149 }
2150
2151
2152 static int wpa_driver_nl80211_authenticate(
2153         void *priv, struct wpa_driver_auth_params *params)
2154 {
2155         struct wpa_driver_nl80211_data *drv = priv;
2156         int ret = -1, i;
2157         struct nl_msg *msg;
2158         enum nl80211_auth_type type;
2159         int count = 0;
2160
2161         drv->associated = 0;
2162         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2163         /* FIX: IBSS mode */
2164         if (drv->nlmode != NL80211_IFTYPE_STATION)
2165                 wpa_driver_nl80211_set_mode(priv, IEEE80211_MODE_INFRA);
2166
2167         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
2168                 return -1;
2169
2170 retry:
2171         msg = nlmsg_alloc();
2172         if (!msg)
2173                 return -1;
2174
2175         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2176                    drv->ifindex);
2177
2178         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2179                     NL80211_CMD_AUTHENTICATE, 0);
2180
2181         for (i = 0; i < 4; i++) {
2182                 if (!params->wep_key[i])
2183                         continue;
2184                 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
2185                                            i,
2186                                            i == params->wep_tx_keyidx, NULL, 0,
2187                                            params->wep_key[i],
2188                                            params->wep_key_len[i]);
2189                 if (params->wep_tx_keyidx != i)
2190                         continue;
2191                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2192                                params->wep_key[i], params->wep_key_len[i])) {
2193                         nlmsg_free(msg);
2194                         return -1;
2195                 }
2196         }
2197
2198         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2199         if (params->bssid) {
2200                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2201                            MAC2STR(params->bssid));
2202                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2203         }
2204         if (params->freq) {
2205                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2206                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2207         }
2208         if (params->ssid) {
2209                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2210                                   params->ssid, params->ssid_len);
2211                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2212                         params->ssid);
2213         }
2214         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2215         if (params->ie)
2216                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2217         /*
2218          * TODO: if multiple auth_alg options enabled, try them one by one if
2219          * the AP rejects authentication due to unknown auth alg
2220          */
2221         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
2222                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2223         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
2224                 type = NL80211_AUTHTYPE_SHARED_KEY;
2225         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
2226                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2227         else if (params->auth_alg & WPA_AUTH_ALG_FT)
2228                 type = NL80211_AUTHTYPE_FT;
2229         else
2230                 goto nla_put_failure;
2231         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2232         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2233
2234         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2235         msg = NULL;
2236         if (ret) {
2237                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2238                            "(%s)", ret, strerror(-ret));
2239                 count++;
2240                 if (ret == -EALREADY && count == 1 && params->bssid) {
2241                         /*
2242                          * mac80211 does not currently accept new
2243                          * authentication if we are already authenticated. As a
2244                          * workaround, force deauthentication and try again.
2245                          */
2246                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2247                                    "after forced deauthentication");
2248                         wpa_driver_nl80211_deauthenticate(
2249                                 drv, params->bssid,
2250                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2251                         nlmsg_free(msg);
2252                         goto retry;
2253                 }
2254                 goto nla_put_failure;
2255         }
2256         ret = 0;
2257         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2258                    "successfully");
2259
2260 nla_put_failure:
2261         nlmsg_free(msg);
2262         return ret;
2263 }
2264
2265
2266 struct phy_info_arg {
2267         u16 *num_modes;
2268         struct hostapd_hw_modes *modes;
2269 };
2270
2271 static int phy_info_handler(struct nl_msg *msg, void *arg)
2272 {
2273         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2274         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2275         struct phy_info_arg *phy_info = arg;
2276
2277         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2278
2279         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2280         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2281                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2282                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2283                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2284                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2285                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2286                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2287         };
2288
2289         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2290         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2291                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2292                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2293         };
2294
2295         struct nlattr *nl_band;
2296         struct nlattr *nl_freq;
2297         struct nlattr *nl_rate;
2298         int rem_band, rem_freq, rem_rate;
2299         struct hostapd_hw_modes *mode;
2300         int idx, mode_is_set;
2301
2302         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2303                   genlmsg_attrlen(gnlh, 0), NULL);
2304
2305         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2306                 return NL_SKIP;
2307
2308         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2309                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2310                 if (!mode)
2311                         return NL_SKIP;
2312                 phy_info->modes = mode;
2313
2314                 mode_is_set = 0;
2315
2316                 mode = &phy_info->modes[*(phy_info->num_modes)];
2317                 memset(mode, 0, sizeof(*mode));
2318                 *(phy_info->num_modes) += 1;
2319
2320                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2321                           nla_len(nl_band), NULL);
2322
2323                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2324                         mode->ht_capab = nla_get_u16(
2325                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2326                 }
2327
2328                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2329                         mode->a_mpdu_params |= nla_get_u8(
2330                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2331                                 0x03;
2332                 }
2333
2334                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2335                         mode->a_mpdu_params |= nla_get_u8(
2336                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2337                                 2;
2338                 }
2339
2340                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2341                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2342                         u8 *mcs;
2343                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2344                         os_memcpy(mode->mcs_set, mcs, 16);
2345                 }
2346
2347                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2348                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2349                                   nla_len(nl_freq), freq_policy);
2350                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2351                                 continue;
2352                         mode->num_channels++;
2353                 }
2354
2355                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2356                 if (!mode->channels)
2357                         return NL_SKIP;
2358
2359                 idx = 0;
2360
2361                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2362                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2363                                   nla_len(nl_freq), freq_policy);
2364                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2365                                 continue;
2366
2367                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2368                         mode->channels[idx].flag = 0;
2369
2370                         if (!mode_is_set) {
2371                                 /* crude heuristic */
2372                                 if (mode->channels[idx].freq < 4000)
2373                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2374                                 else
2375                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2376                                 mode_is_set = 1;
2377                         }
2378
2379                         /* crude heuristic */
2380                         if (mode->channels[idx].freq < 4000)
2381                                 if (mode->channels[idx].freq == 2484)
2382                                         mode->channels[idx].chan = 14;
2383                                 else
2384                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2385                         else
2386                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2387
2388                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2389                                 mode->channels[idx].flag |=
2390                                         HOSTAPD_CHAN_DISABLED;
2391                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2392                                 mode->channels[idx].flag |=
2393                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2394                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2395                                 mode->channels[idx].flag |=
2396                                         HOSTAPD_CHAN_NO_IBSS;
2397                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2398                                 mode->channels[idx].flag |=
2399                                         HOSTAPD_CHAN_RADAR;
2400
2401                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2402                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2403                                 mode->channels[idx].max_tx_power =
2404                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2405
2406                         idx++;
2407                 }
2408
2409                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2410                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2411                                   nla_len(nl_rate), rate_policy);
2412                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2413                                 continue;
2414                         mode->num_rates++;
2415                 }
2416
2417                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2418                 if (!mode->rates)
2419                         return NL_SKIP;
2420
2421                 idx = 0;
2422
2423                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2424                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2425                                   nla_len(nl_rate), rate_policy);
2426                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2427                                 continue;
2428                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2429
2430                         /* crude heuristic */
2431                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2432                             mode->rates[idx] > 200)
2433                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2434
2435                         idx++;
2436                 }
2437         }
2438
2439         return NL_SKIP;
2440 }
2441
2442 static struct hostapd_hw_modes *
2443 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2444 {
2445         u16 m;
2446         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2447         int i, mode11g_idx = -1;
2448
2449         /* If only 802.11g mode is included, use it to construct matching
2450          * 802.11b mode data. */
2451
2452         for (m = 0; m < *num_modes; m++) {
2453                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2454                         return modes; /* 802.11b already included */
2455                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2456                         mode11g_idx = m;
2457         }
2458
2459         if (mode11g_idx < 0)
2460                 return modes; /* 2.4 GHz band not supported at all */
2461
2462         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2463         if (nmodes == NULL)
2464                 return modes; /* Could not add 802.11b mode */
2465
2466         mode = &nmodes[*num_modes];
2467         os_memset(mode, 0, sizeof(*mode));
2468         (*num_modes)++;
2469         modes = nmodes;
2470
2471         mode->mode = HOSTAPD_MODE_IEEE80211B;
2472
2473         mode11g = &modes[mode11g_idx];
2474         mode->num_channels = mode11g->num_channels;
2475         mode->channels = os_malloc(mode11g->num_channels *
2476                                    sizeof(struct hostapd_channel_data));
2477         if (mode->channels == NULL) {
2478                 (*num_modes)--;
2479                 return modes; /* Could not add 802.11b mode */
2480         }
2481         os_memcpy(mode->channels, mode11g->channels,
2482                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2483
2484         mode->num_rates = 0;
2485         mode->rates = os_malloc(4 * sizeof(int));
2486         if (mode->rates == NULL) {
2487                 os_free(mode->channels);
2488                 (*num_modes)--;
2489                 return modes; /* Could not add 802.11b mode */
2490         }
2491
2492         for (i = 0; i < mode11g->num_rates; i++) {
2493                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2494                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2495                         continue;
2496                 mode->rates[mode->num_rates] = mode11g->rates[i];
2497                 mode->num_rates++;
2498                 if (mode->num_rates == 4)
2499                         break;
2500         }
2501
2502         if (mode->num_rates == 0) {
2503                 os_free(mode->channels);
2504                 os_free(mode->rates);
2505                 (*num_modes)--;
2506                 return modes; /* No 802.11b rates */
2507         }
2508
2509         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2510                    "information");
2511
2512         return modes;
2513 }
2514
2515
2516 static struct hostapd_hw_modes *
2517 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2518 {
2519         struct wpa_driver_nl80211_data *drv = priv;
2520         struct nl_msg *msg;
2521         struct phy_info_arg result = {
2522                 .num_modes = num_modes,
2523                 .modes = NULL,
2524         };
2525
2526         *num_modes = 0;
2527         *flags = 0;
2528
2529         msg = nlmsg_alloc();
2530         if (!msg)
2531                 return NULL;
2532
2533         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2534                     0, NL80211_CMD_GET_WIPHY, 0);
2535
2536         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2537
2538         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2539                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2540  nla_put_failure:
2541         return NULL;
2542 }
2543
2544
2545 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2546                                          const void *data, size_t len,
2547                                          int encrypt)
2548 {
2549         __u8 rtap_hdr[] = {
2550                 0x00, 0x00, /* radiotap version */
2551                 0x0e, 0x00, /* radiotap length */
2552                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2553                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2554                 0x00,       /* padding */
2555                 0x00, 0x00, /* RX and TX flags to indicate that */
2556                 0x00, 0x00, /* this is the injected frame directly */
2557         };
2558         struct iovec iov[2] = {
2559                 {
2560                         .iov_base = &rtap_hdr,
2561                         .iov_len = sizeof(rtap_hdr),
2562                 },
2563                 {
2564                         .iov_base = (void *) data,
2565                         .iov_len = len,
2566                 }
2567         };
2568         struct msghdr msg = {
2569                 .msg_name = NULL,
2570                 .msg_namelen = 0,
2571                 .msg_iov = iov,
2572                 .msg_iovlen = 2,
2573                 .msg_control = NULL,
2574                 .msg_controllen = 0,
2575                 .msg_flags = 0,
2576         };
2577
2578         if (encrypt)
2579                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2580
2581         return sendmsg(drv->monitor_sock, &msg, 0);
2582 }
2583
2584
2585 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2586                                         size_t data_len)
2587 {
2588         struct wpa_driver_nl80211_data *drv = priv;
2589         struct ieee80211_mgmt *mgmt;
2590         int encrypt = 1;
2591         u16 fc;
2592
2593         mgmt = (struct ieee80211_mgmt *) data;
2594         fc = le_to_host16(mgmt->frame_control);
2595
2596         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2597             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2598                 /*
2599                  * Only one of the authentication frame types is encrypted.
2600                  * In order for static WEP encryption to work properly (i.e.,
2601                  * to not encrypt the frame), we need to tell mac80211 about
2602                  * the frames that must not be encrypted.
2603                  */
2604                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2605                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2606                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2607                         encrypt = 0;
2608         }
2609
2610         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2611 }
2612
2613
2614 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2615                                          const u8 *head, size_t head_len,
2616                                          const u8 *tail, size_t tail_len,
2617                                          int dtim_period, int beacon_int)
2618 {
2619         struct wpa_driver_nl80211_data *drv = priv;
2620         struct nl_msg *msg;
2621         u8 cmd = NL80211_CMD_NEW_BEACON;
2622         int ret;
2623         int beacon_set;
2624         int ifindex = if_nametoindex(ifname);
2625 #ifdef HOSTAPD
2626         struct i802_bss *bss;
2627
2628         bss = get_bss(drv, ifindex);
2629         if (bss == NULL)
2630                 return -ENOENT;
2631         beacon_set = bss->beacon_set;
2632 #else /* HOSTAPD */
2633         beacon_set = drv->beacon_set;
2634 #endif /* HOSTAPD */
2635
2636         msg = nlmsg_alloc();
2637         if (!msg)
2638                 return -ENOMEM;
2639
2640         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2641                    beacon_set);
2642         if (beacon_set)
2643                 cmd = NL80211_CMD_SET_BEACON;
2644
2645         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2646                     0, cmd, 0);
2647         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2648         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2649         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2650         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2651         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2652
2653         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2654         if (ret) {
2655                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2656                            ret, strerror(-ret));
2657         } else {
2658 #ifdef HOSTAPD
2659                 bss->beacon_set = 1;
2660 #else /* HOSTAPD */
2661                 drv->beacon_set = 1;
2662 #endif /* HOSTAPD */
2663         }
2664         return ret;
2665  nla_put_failure:
2666         return -ENOBUFS;
2667 }
2668
2669
2670 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2671                                        int freq, int ht_enabled,
2672                                        int sec_channel_offset)
2673 {
2674         struct nl_msg *msg;
2675         int ret;
2676
2677         msg = nlmsg_alloc();
2678         if (!msg)
2679                 return -1;
2680
2681         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2682                     NL80211_CMD_SET_WIPHY, 0);
2683
2684         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2685         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2686         if (ht_enabled) {
2687                 switch (sec_channel_offset) {
2688                 case -1:
2689                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2690                                     NL80211_CHAN_HT40MINUS);
2691                         break;
2692                 case 1:
2693                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2694                                     NL80211_CHAN_HT40PLUS);
2695                         break;
2696                 default:
2697                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2698                                     NL80211_CHAN_HT20);
2699                         break;
2700                 }
2701         }
2702
2703         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2704         if (ret == 0)
2705                 return 0;
2706         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2707                    "%d (%s)", freq, ret, strerror(-ret));
2708 nla_put_failure:
2709         return -1;
2710 }
2711
2712
2713 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2714                                       struct hostapd_sta_add_params *params)
2715 {
2716         struct wpa_driver_nl80211_data *drv = priv;
2717         struct nl_msg *msg;
2718         int ret = -ENOBUFS;
2719
2720         msg = nlmsg_alloc();
2721         if (!msg)
2722                 return -ENOMEM;
2723
2724         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2725                     0, NL80211_CMD_NEW_STATION, 0);
2726
2727         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2728         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2729         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2730         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2731                 params->supp_rates);
2732         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2733                     params->listen_interval);
2734         if (params->ht_capabilities) {
2735                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2736                         sizeof(*params->ht_capabilities),
2737                         params->ht_capabilities);
2738         }
2739
2740         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2741         if (ret)
2742                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2743                            "result: %d (%s)", ret, strerror(-ret));
2744         if (ret == -EEXIST)
2745                 ret = 0;
2746  nla_put_failure:
2747         return ret;
2748 }
2749
2750
2751 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2752 {
2753         struct wpa_driver_nl80211_data *drv = priv;
2754         struct nl_msg *msg;
2755         int ret;
2756
2757         msg = nlmsg_alloc();
2758         if (!msg)
2759                 return -ENOMEM;
2760
2761         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2762                     0, NL80211_CMD_DEL_STATION, 0);
2763
2764         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2765                     if_nametoindex(drv->ifname));
2766         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2767
2768         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2769         if (ret == -ENOENT)
2770                 return 0;
2771         return ret;
2772  nla_put_failure:
2773         return -ENOBUFS;
2774 }
2775
2776
2777 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2778                                  int ifidx)
2779 {
2780         struct nl_msg *msg;
2781
2782         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
2783
2784 #ifdef HOSTAPD
2785         /* stop listening for EAPOL on this interface */
2786         del_ifidx(drv, ifidx);
2787 #endif /* HOSTAPD */
2788
2789         msg = nlmsg_alloc();
2790         if (!msg)
2791                 goto nla_put_failure;
2792
2793         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2794                     0, NL80211_CMD_DEL_INTERFACE, 0);
2795         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2796
2797         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2798                 return;
2799  nla_put_failure:
2800         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d)", ifidx);
2801 }
2802
2803
2804 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2805                                      const char *ifname,
2806                                      enum nl80211_iftype iftype,
2807                                      const u8 *addr, int wds)
2808 {
2809         struct nl_msg *msg, *flags = NULL;
2810         int ifidx;
2811         int ret = -ENOBUFS;
2812
2813         msg = nlmsg_alloc();
2814         if (!msg)
2815                 return -1;
2816
2817         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2818                     0, NL80211_CMD_NEW_INTERFACE, 0);
2819         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2820         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2821         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2822
2823         if (iftype == NL80211_IFTYPE_MONITOR) {
2824                 int err;
2825
2826                 flags = nlmsg_alloc();
2827                 if (!flags)
2828                         goto nla_put_failure;
2829
2830                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2831
2832                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2833
2834                 nlmsg_free(flags);
2835
2836                 if (err)
2837                         goto nla_put_failure;
2838         } else if (wds) {
2839                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
2840         }
2841
2842         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2843         if (ret) {
2844  nla_put_failure:
2845                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2846                            ifname, ret, strerror(-ret));
2847                 return ret;
2848         }
2849
2850         ifidx = if_nametoindex(ifname);
2851         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
2852                    ifname, ifidx);
2853
2854         if (ifidx <= 0)
2855                 return -1;
2856
2857 #ifdef HOSTAPD
2858         /* start listening for EAPOL on this interface */
2859         add_ifidx(drv, ifidx);
2860 #endif /* HOSTAPD */
2861
2862         if (addr && iftype != NL80211_IFTYPE_MONITOR &&
2863             linux_set_ifhwaddr(drv->ioctl_sock, ifname, addr)) {
2864                 nl80211_remove_iface(drv, ifidx);
2865                 return -1;
2866         }
2867
2868         return ifidx;
2869 }
2870
2871
2872 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2873                                 const char *ifname, enum nl80211_iftype iftype,
2874                                 const u8 *addr, int wds)
2875 {
2876         int ret;
2877
2878         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
2879
2880         /* if error occured and interface exists already */
2881         if (ret == -ENFILE && if_nametoindex(ifname)) {
2882                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2883
2884                 /* Try to remove the interface that was already there. */
2885                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2886
2887                 /* Try to create the interface again */
2888                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
2889                                                 wds);
2890         }
2891
2892         if (ret >= 0 && drv->disable_11b_rates)
2893                 nl80211_disable_11b_rates(drv, ret, 1);
2894
2895         return ret;
2896 }
2897
2898
2899 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2900 {
2901         struct ieee80211_hdr *hdr;
2902         u16 fc;
2903         union wpa_event_data event;
2904
2905         hdr = (struct ieee80211_hdr *) buf;
2906         fc = le_to_host16(hdr->frame_control);
2907
2908         os_memset(&event, 0, sizeof(event));
2909         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
2910         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
2911         event.tx_status.dst = hdr->addr1;
2912         event.tx_status.data = buf;
2913         event.tx_status.data_len = len;
2914         event.tx_status.ack = ok;
2915         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
2916 }
2917
2918
2919 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2920                              u8 *buf, size_t len)
2921 {
2922         union wpa_event_data event;
2923         os_memset(&event, 0, sizeof(event));
2924         event.rx_from_unknown.frame = buf;
2925         event.rx_from_unknown.len = len;
2926         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
2927 }
2928
2929
2930 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2931                          u8 *buf, size_t len, int datarate, int ssi_signal)
2932 {
2933         struct ieee80211_hdr *hdr;
2934         u16 fc;
2935         union wpa_event_data event;
2936
2937         hdr = (struct ieee80211_hdr *) buf;
2938         fc = le_to_host16(hdr->frame_control);
2939
2940         switch (WLAN_FC_GET_TYPE(fc)) {
2941         case WLAN_FC_TYPE_MGMT:
2942                 os_memset(&event, 0, sizeof(event));
2943                 event.rx_mgmt.frame = buf;
2944                 event.rx_mgmt.frame_len = len;
2945                 event.rx_mgmt.datarate = datarate;
2946                 event.rx_mgmt.ssi_signal = ssi_signal;
2947                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
2948                 break;
2949         case WLAN_FC_TYPE_CTRL:
2950                 /* can only get here with PS-Poll frames */
2951                 wpa_printf(MSG_DEBUG, "CTRL");
2952                 from_unknown_sta(drv, buf, len);
2953                 break;
2954         case WLAN_FC_TYPE_DATA:
2955                 from_unknown_sta(drv, buf, len);
2956                 break;
2957         }
2958 }
2959
2960
2961 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2962 {
2963         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2964         int len;
2965         unsigned char buf[3000];
2966         struct ieee80211_radiotap_iterator iter;
2967         int ret;
2968         int datarate = 0, ssi_signal = 0;
2969         int injected = 0, failed = 0, rxflags = 0;
2970
2971         len = recv(sock, buf, sizeof(buf), 0);
2972         if (len < 0) {
2973                 perror("recv");
2974                 return;
2975         }
2976
2977         if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
2978                 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
2979                            "frame since Probe Request reporting is disabled");
2980                 return;
2981         }
2982
2983         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2984                 printf("received invalid radiotap frame\n");
2985                 return;
2986         }
2987
2988         while (1) {
2989                 ret = ieee80211_radiotap_iterator_next(&iter);
2990                 if (ret == -ENOENT)
2991                         break;
2992                 if (ret) {
2993                         printf("received invalid radiotap frame (%d)\n", ret);
2994                         return;
2995                 }
2996                 switch (iter.this_arg_index) {
2997                 case IEEE80211_RADIOTAP_FLAGS:
2998                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2999                                 len -= 4;
3000                         break;
3001                 case IEEE80211_RADIOTAP_RX_FLAGS:
3002                         rxflags = 1;
3003                         break;
3004                 case IEEE80211_RADIOTAP_TX_FLAGS:
3005                         injected = 1;
3006                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
3007                                         IEEE80211_RADIOTAP_F_TX_FAIL;
3008                         break;
3009                 case IEEE80211_RADIOTAP_DATA_RETRIES:
3010                         break;
3011                 case IEEE80211_RADIOTAP_CHANNEL:
3012                         /* TODO: convert from freq/flags to channel number */
3013                         break;
3014                 case IEEE80211_RADIOTAP_RATE:
3015                         datarate = *iter.this_arg * 5;
3016                         break;
3017                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
3018                         ssi_signal = *iter.this_arg;
3019                         break;
3020                 }
3021         }
3022
3023         if (rxflags && injected)
3024                 return;
3025
3026         if (!injected)
3027                 handle_frame(drv, buf + iter.max_length,
3028                              len - iter.max_length, datarate, ssi_signal);
3029         else
3030                 handle_tx_callback(drv->ctx, buf + iter.max_length,
3031                                    len - iter.max_length, !failed);
3032 }
3033
3034
3035 /*
3036  * we post-process the filter code later and rewrite
3037  * this to the offset to the last instruction
3038  */
3039 #define PASS    0xFF
3040 #define FAIL    0xFE
3041
3042 static struct sock_filter msock_filter_insns[] = {
3043         /*
3044          * do a little-endian load of the radiotap length field
3045          */
3046         /* load lower byte into A */
3047         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3048         /* put it into X (== index register) */
3049         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3050         /* load upper byte into A */
3051         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3052         /* left-shift it by 8 */
3053         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3054         /* or with X */
3055         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3056         /* put result into X */
3057         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3058
3059         /*
3060          * Allow management frames through, this also gives us those
3061          * management frames that we sent ourselves with status
3062          */
3063         /* load the lower byte of the IEEE 802.11 frame control field */
3064         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3065         /* mask off frame type and version */
3066         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3067         /* accept frame if it's both 0, fall through otherwise */
3068         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3069
3070         /*
3071          * TODO: add a bit to radiotap RX flags that indicates
3072          * that the sending station is not associated, then
3073          * add a filter here that filters on our DA and that flag
3074          * to allow us to deauth frames to that bad station.
3075          *
3076          * Not a regression -- we didn't do it before either.
3077          */
3078
3079 #if 0
3080         /*
3081          * drop non-data frames
3082          */
3083         /* load the lower byte of the frame control field */
3084         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3085         /* mask off QoS bit */
3086         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3087         /* drop non-data frames */
3088         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3089 #endif
3090         /* load the upper byte of the frame control field */
3091         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
3092         /* mask off toDS/fromDS */
3093         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3094         /* accept WDS frames */
3095         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
3096
3097         /*
3098          * add header length to index
3099          */
3100         /* load the lower byte of the frame control field */
3101         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3102         /* mask off QoS bit */
3103         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3104         /* right shift it by 6 to give 0 or 2 */
3105         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3106         /* add data frame header length */
3107         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3108         /* add index, was start of 802.11 header */
3109         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3110         /* move to index, now start of LL header */
3111         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3112
3113         /*
3114          * Accept empty data frames, we use those for
3115          * polling activity.
3116          */
3117         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3118         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3119
3120         /*
3121          * Accept EAPOL frames
3122          */
3123         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3124         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3125         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3126         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3127
3128         /* keep these last two statements or change the code below */
3129         /* return 0 == "DROP" */
3130         BPF_STMT(BPF_RET | BPF_K, 0),
3131         /* return ~0 == "keep all" */
3132         BPF_STMT(BPF_RET | BPF_K, ~0),
3133 };
3134
3135 static struct sock_fprog msock_filter = {
3136         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3137         .filter = msock_filter_insns,
3138 };
3139
3140
3141 static int add_monitor_filter(int s)
3142 {
3143         int idx;
3144
3145         /* rewrite all PASS/FAIL jump offsets */
3146         for (idx = 0; idx < msock_filter.len; idx++) {
3147                 struct sock_filter *insn = &msock_filter_insns[idx];
3148
3149                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3150                         if (insn->code == (BPF_JMP|BPF_JA)) {
3151                                 if (insn->k == PASS)
3152                                         insn->k = msock_filter.len - idx - 2;
3153                                 else if (insn->k == FAIL)
3154                                         insn->k = msock_filter.len - idx - 3;
3155                         }
3156
3157                         if (insn->jt == PASS)
3158                                 insn->jt = msock_filter.len - idx - 2;
3159                         else if (insn->jt == FAIL)
3160                                 insn->jt = msock_filter.len - idx - 3;
3161
3162                         if (insn->jf == PASS)
3163                                 insn->jf = msock_filter.len - idx - 2;
3164                         else if (insn->jf == FAIL)
3165                                 insn->jf = msock_filter.len - idx - 3;
3166                 }
3167         }
3168
3169         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3170                        &msock_filter, sizeof(msock_filter))) {
3171                 perror("SO_ATTACH_FILTER");
3172                 return -1;
3173         }
3174
3175         return 0;
3176 }
3177
3178
3179 static void nl80211_remove_monitor_interface(
3180         struct wpa_driver_nl80211_data *drv)
3181 {
3182         if (drv->monitor_ifidx >= 0) {
3183                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3184                 drv->monitor_ifidx = -1;
3185         }
3186         if (drv->monitor_sock >= 0) {
3187                 eloop_unregister_read_sock(drv->monitor_sock);
3188                 close(drv->monitor_sock);
3189                 drv->monitor_sock = -1;
3190         }
3191 }
3192
3193
3194 static int
3195 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3196 {
3197         char buf[IFNAMSIZ];
3198         struct sockaddr_ll ll;
3199         int optval;
3200         socklen_t optlen;
3201
3202         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3203         buf[IFNAMSIZ - 1] = '\0';
3204
3205         drv->monitor_ifidx =
3206                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3207                                      0);
3208
3209         if (drv->monitor_ifidx < 0)
3210                 return -1;
3211
3212         if (linux_set_iface_flags(drv->ioctl_sock, buf, 1))
3213                 goto error;
3214
3215         memset(&ll, 0, sizeof(ll));
3216         ll.sll_family = AF_PACKET;
3217         ll.sll_ifindex = drv->monitor_ifidx;
3218         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3219         if (drv->monitor_sock < 0) {
3220                 perror("socket[PF_PACKET,SOCK_RAW]");
3221                 goto error;
3222         }
3223
3224         if (add_monitor_filter(drv->monitor_sock)) {
3225                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3226                            "interface; do filtering in user space");
3227                 /* This works, but will cost in performance. */
3228         }
3229
3230         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3231                 perror("monitor socket bind");
3232                 goto error;
3233         }
3234
3235         optlen = sizeof(optval);
3236         optval = 20;
3237         if (setsockopt
3238             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3239                 perror("Failed to set socket priority");
3240                 goto error;
3241         }
3242
3243         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3244                                      drv, NULL)) {
3245                 printf("Could not register monitor read socket\n");
3246                 goto error;
3247         }
3248
3249         return 0;
3250  error:
3251         nl80211_remove_monitor_interface(drv);
3252         return -1;
3253 }
3254
3255
3256 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3257
3258 static int wpa_driver_nl80211_hapd_send_eapol(
3259         void *priv, const u8 *addr, const u8 *data,
3260         size_t data_len, int encrypt, const u8 *own_addr)
3261 {
3262         struct wpa_driver_nl80211_data *drv = priv;
3263         struct ieee80211_hdr *hdr;
3264         size_t len;
3265         u8 *pos;
3266         int res;
3267 #if 0 /* FIX */
3268         int qos = sta->flags & WPA_STA_WMM;
3269 #else
3270         int qos = 0;
3271 #endif
3272
3273         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3274                 data_len;
3275         hdr = os_zalloc(len);
3276         if (hdr == NULL) {
3277                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3278                        (unsigned long) len);
3279                 return -1;
3280         }
3281
3282         hdr->frame_control =
3283                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3284         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3285         if (encrypt)
3286                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3287 #if 0 /* To be enabled if qos determination is added above */
3288         if (qos) {
3289                 hdr->frame_control |=
3290                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3291         }
3292 #endif
3293
3294         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3295         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3296         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3297         pos = (u8 *) (hdr + 1);
3298
3299 #if 0 /* To be enabled if qos determination is added above */
3300         if (qos) {
3301                 /* add an empty QoS header if needed */
3302                 pos[0] = 0;
3303                 pos[1] = 0;
3304                 pos += 2;
3305         }
3306 #endif
3307
3308         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3309         pos += sizeof(rfc1042_header);
3310         WPA_PUT_BE16(pos, ETH_P_PAE);
3311         pos += 2;
3312         memcpy(pos, data, data_len);
3313
3314         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3315         if (res < 0) {
3316                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3317                            "failed: %d (%s)",
3318                            (unsigned long) len, errno, strerror(errno));
3319         }
3320         os_free(hdr);
3321
3322         return res;
3323 }
3324
3325
3326 static u32 sta_flags_nl80211(int flags)
3327 {
3328         u32 f = 0;
3329
3330         if (flags & WPA_STA_AUTHORIZED)
3331                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3332         if (flags & WPA_STA_WMM)
3333                 f |= BIT(NL80211_STA_FLAG_WME);
3334         if (flags & WPA_STA_SHORT_PREAMBLE)
3335                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3336         if (flags & WPA_STA_MFP)
3337                 f |= BIT(NL80211_STA_FLAG_MFP);
3338
3339         return f;
3340 }
3341
3342
3343 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3344                                             int total_flags, int flags_or,
3345                                             int flags_and)
3346 {
3347         struct wpa_driver_nl80211_data *drv = priv;
3348         struct nl_msg *msg, *flags = NULL;
3349         struct nl80211_sta_flag_update upd;
3350
3351         msg = nlmsg_alloc();
3352         if (!msg)
3353                 return -ENOMEM;
3354
3355         flags = nlmsg_alloc();
3356         if (!flags) {
3357                 nlmsg_free(msg);
3358                 return -ENOMEM;
3359         }
3360
3361         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3362                     0, NL80211_CMD_SET_STATION, 0);
3363
3364         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3365                     if_nametoindex(drv->ifname));
3366         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3367
3368         /*
3369          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3370          * can be removed eventually.
3371          */
3372         if (total_flags & WPA_STA_AUTHORIZED)
3373                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3374
3375         if (total_flags & WPA_STA_WMM)
3376                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3377
3378         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3379                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3380
3381         if (total_flags & WPA_STA_MFP)
3382                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3383
3384         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3385                 goto nla_put_failure;
3386
3387         os_memset(&upd, 0, sizeof(upd));
3388         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3389         upd.set = sta_flags_nl80211(flags_or);
3390         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3391
3392         nlmsg_free(flags);
3393
3394         return send_and_recv_msgs(drv, msg, NULL, NULL);
3395  nla_put_failure:
3396         nlmsg_free(flags);
3397         return -ENOBUFS;
3398 }
3399
3400
3401 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3402                                  struct wpa_driver_associate_params *params)
3403 {
3404         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3405             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3406                 nl80211_remove_monitor_interface(drv);
3407                 return -1;
3408         }
3409
3410         /* TODO: setup monitor interface (and add code somewhere to remove this
3411          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3412
3413         return 0;
3414 }
3415
3416
3417 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3418 {
3419         struct nl_msg *msg;
3420         int ret = -1;
3421
3422         msg = nlmsg_alloc();
3423         if (!msg)
3424                 return -1;
3425
3426         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3427                     NL80211_CMD_LEAVE_IBSS, 0);
3428         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3429         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3430         msg = NULL;
3431         if (ret) {
3432                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3433                            "(%s)", ret, strerror(-ret));
3434                 goto nla_put_failure;
3435         }
3436
3437         ret = 0;
3438         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3439
3440 nla_put_failure:
3441         nlmsg_free(msg);
3442         return ret;
3443 }
3444
3445
3446 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3447                                    struct wpa_driver_associate_params *params)
3448 {
3449         struct nl_msg *msg;
3450         int ret = -1;
3451         int count = 0;
3452
3453         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3454
3455         if (wpa_driver_nl80211_set_mode(drv, params->mode)) {
3456                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3457                            "IBSS mode");
3458                 return -1;
3459         }
3460
3461 retry:
3462         msg = nlmsg_alloc();
3463         if (!msg)
3464                 return -1;
3465
3466         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3467                     NL80211_CMD_JOIN_IBSS, 0);
3468         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3469
3470         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3471                 goto nla_put_failure;
3472
3473         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3474                           params->ssid, params->ssid_len);
3475         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3476                 params->ssid);
3477         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3478         drv->ssid_len = params->ssid_len;
3479
3480         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3481         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3482
3483         ret = nl80211_set_conn_keys(params, msg);
3484         if (ret)
3485                 goto nla_put_failure;
3486
3487         if (params->wpa_ie) {
3488                 wpa_hexdump(MSG_DEBUG,
3489                             "  * Extra IEs for Beacon/Probe Response frames",
3490                             params->wpa_ie, params->wpa_ie_len);
3491                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3492                         params->wpa_ie);
3493         }
3494
3495         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3496         msg = NULL;
3497         if (ret) {
3498                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3499                            ret, strerror(-ret));
3500                 count++;
3501                 if (ret == -EALREADY && count == 1) {
3502                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3503                                    "forced leave");
3504                         nl80211_leave_ibss(drv);
3505                         nlmsg_free(msg);
3506                         goto retry;
3507                 }
3508
3509                 goto nla_put_failure;
3510         }
3511         ret = 0;
3512         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3513
3514 nla_put_failure:
3515         nlmsg_free(msg);
3516         return ret;
3517 }
3518
3519
3520 static int wpa_driver_nl80211_connect(
3521         struct wpa_driver_nl80211_data *drv,
3522         struct wpa_driver_associate_params *params)
3523 {
3524         struct nl_msg *msg;
3525         enum nl80211_auth_type type;
3526         int ret = 0;
3527
3528         msg = nlmsg_alloc();
3529         if (!msg)
3530                 return -1;
3531
3532         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3533         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3534                     NL80211_CMD_CONNECT, 0);
3535
3536         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3537         if (params->bssid) {
3538                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3539                            MAC2STR(params->bssid));
3540                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3541         }
3542         if (params->freq) {
3543                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3544                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3545         }
3546         if (params->ssid) {
3547                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3548                                   params->ssid, params->ssid_len);
3549                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3550                         params->ssid);
3551                 if (params->ssid_len > sizeof(drv->ssid))
3552                         goto nla_put_failure;
3553                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3554                 drv->ssid_len = params->ssid_len;
3555         }
3556         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3557         if (params->wpa_ie)
3558                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3559                         params->wpa_ie);
3560
3561         if (params->auth_alg & WPA_AUTH_ALG_OPEN)
3562                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3563         else if (params->auth_alg & WPA_AUTH_ALG_SHARED)
3564                 type = NL80211_AUTHTYPE_SHARED_KEY;
3565         else if (params->auth_alg & WPA_AUTH_ALG_LEAP)
3566                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3567         else if (params->auth_alg & WPA_AUTH_ALG_FT)
3568                 type = NL80211_AUTHTYPE_FT;
3569         else
3570                 goto nla_put_failure;
3571
3572         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3573         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3574
3575         if (params->wpa_ie && params->wpa_ie_len) {
3576                 enum nl80211_wpa_versions ver;
3577
3578                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3579                         ver = NL80211_WPA_VERSION_2;
3580                 else
3581                         ver = NL80211_WPA_VERSION_1;
3582
3583                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3584                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3585         }
3586
3587         if (params->pairwise_suite != CIPHER_NONE) {
3588                 int cipher;
3589
3590                 switch (params->pairwise_suite) {
3591                 case CIPHER_WEP40:
3592                         cipher = WLAN_CIPHER_SUITE_WEP40;
3593                         break;
3594                 case CIPHER_WEP104:
3595                         cipher = WLAN_CIPHER_SUITE_WEP104;
3596                         break;
3597                 case CIPHER_CCMP:
3598                         cipher = WLAN_CIPHER_SUITE_CCMP;
3599                         break;
3600                 case CIPHER_TKIP:
3601                 default:
3602                         cipher = WLAN_CIPHER_SUITE_TKIP;
3603                         break;
3604                 }
3605                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3606         }
3607
3608         if (params->group_suite != CIPHER_NONE) {
3609                 int cipher;
3610
3611                 switch (params->group_suite) {
3612                 case CIPHER_WEP40:
3613                         cipher = WLAN_CIPHER_SUITE_WEP40;
3614                         break;
3615                 case CIPHER_WEP104:
3616                         cipher = WLAN_CIPHER_SUITE_WEP104;
3617                         break;
3618                 case CIPHER_CCMP:
3619                         cipher = WLAN_CIPHER_SUITE_CCMP;
3620                         break;
3621                 case CIPHER_TKIP:
3622                 default:
3623                         cipher = WLAN_CIPHER_SUITE_TKIP;
3624                         break;
3625                 }
3626                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3627         }
3628
3629         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3630             params->key_mgmt_suite == KEY_MGMT_PSK) {
3631                 int mgmt = WLAN_AKM_SUITE_PSK;
3632
3633                 switch (params->key_mgmt_suite) {
3634                 case KEY_MGMT_802_1X:
3635                         mgmt = WLAN_AKM_SUITE_8021X;
3636                         break;
3637                 case KEY_MGMT_PSK:
3638                 default:
3639                         mgmt = WLAN_AKM_SUITE_PSK;
3640                         break;
3641                 }
3642                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3643         }
3644
3645         ret = nl80211_set_conn_keys(params, msg);
3646         if (ret)
3647                 goto nla_put_failure;
3648
3649         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3650         msg = NULL;
3651         if (ret) {
3652                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3653                            "(%s)", ret, strerror(-ret));
3654                 goto nla_put_failure;
3655         }
3656         ret = 0;
3657         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3658
3659 nla_put_failure:
3660         nlmsg_free(msg);
3661         return ret;
3662
3663 }
3664
3665
3666 static int wpa_driver_nl80211_associate(
3667         void *priv, struct wpa_driver_associate_params *params)
3668 {
3669         struct wpa_driver_nl80211_data *drv = priv;
3670         int ret = -1;
3671         struct nl_msg *msg;
3672
3673         if (params->mode == IEEE80211_MODE_AP)
3674                 return wpa_driver_nl80211_ap(drv, params);
3675
3676         if (params->mode == IEEE80211_MODE_IBSS)
3677                 return wpa_driver_nl80211_ibss(drv, params);
3678
3679         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3680                 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3681                         return -1;
3682                 return wpa_driver_nl80211_connect(drv, params);
3683         }
3684
3685         drv->associated = 0;
3686
3687         msg = nlmsg_alloc();
3688         if (!msg)
3689                 return -1;
3690
3691         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3692                    drv->ifindex);
3693         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3694                     NL80211_CMD_ASSOCIATE, 0);
3695
3696         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3697         if (params->bssid) {
3698                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3699                            MAC2STR(params->bssid));
3700                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3701         }
3702         if (params->freq) {
3703                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3704                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3705                 drv->assoc_freq = params->freq;
3706         } else
3707                 drv->assoc_freq = 0;
3708         if (params->ssid) {
3709                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3710                                   params->ssid, params->ssid_len);
3711                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3712                         params->ssid);
3713                 if (params->ssid_len > sizeof(drv->ssid))
3714                         goto nla_put_failure;
3715                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3716                 drv->ssid_len = params->ssid_len;
3717         }
3718         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3719         if (params->wpa_ie)
3720                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3721                         params->wpa_ie);
3722
3723 #ifdef CONFIG_IEEE80211W
3724         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3725                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3726 #endif /* CONFIG_IEEE80211W */
3727
3728         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3729
3730         if (params->prev_bssid) {
3731                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3732                            MAC2STR(params->prev_bssid));
3733                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3734                         params->prev_bssid);
3735         }
3736
3737         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3738         msg = NULL;
3739         if (ret) {
3740                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3741                            "(%s)", ret, strerror(-ret));
3742                 nl80211_dump_scan(drv);
3743                 goto nla_put_failure;
3744         }
3745         ret = 0;
3746         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3747                    "successfully");
3748
3749 nla_put_failure:
3750         nlmsg_free(msg);
3751         return ret;
3752 }
3753
3754
3755 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3756                             int ifindex, int mode)
3757 {
3758         struct nl_msg *msg;
3759         int ret = -ENOBUFS;
3760
3761         msg = nlmsg_alloc();
3762         if (!msg)
3763                 return -ENOMEM;
3764
3765         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3766                     0, NL80211_CMD_SET_INTERFACE, 0);
3767         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3768         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3769
3770         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3771         if (!ret)
3772                 return 0;
3773 nla_put_failure:
3774         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3775                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3776         return ret;
3777 }
3778
3779
3780 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3781 {
3782         struct wpa_driver_nl80211_data *drv = priv;
3783         int ret = -1;
3784         int nlmode;
3785
3786         switch (mode) {
3787         case 0:
3788                 nlmode = NL80211_IFTYPE_STATION;
3789                 break;
3790         case 1:
3791                 nlmode = NL80211_IFTYPE_ADHOC;
3792                 break;
3793         case 2:
3794                 nlmode = NL80211_IFTYPE_AP;
3795                 break;
3796         default:
3797                 return -1;
3798         }
3799
3800         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3801                 drv->nlmode = nlmode;
3802                 ret = 0;
3803                 goto done;
3804         }
3805
3806         if (nlmode == drv->nlmode) {
3807                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
3808                            "requested mode - ignore error");
3809                 ret = 0;
3810                 goto done; /* Already in the requested mode */
3811         }
3812
3813         /* mac80211 doesn't allow mode changes while the device is up, so
3814          * take the device down, try to set the mode again, and bring the
3815          * device back up.
3816          */
3817         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0) == 0) {
3818                 /* Try to set the mode again while the interface is down */
3819                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3820                 if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1))
3821                         ret = -1;
3822         }
3823
3824         if (!ret) {
3825                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
3826                            "interface is down");
3827                 drv->nlmode = nlmode;
3828         }
3829
3830 done:
3831         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3832                 /* Setup additional AP mode functionality if needed */
3833                 if (drv->monitor_ifidx < 0 &&
3834                     nl80211_create_monitor_interface(drv))
3835                         return -1;
3836         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3837                 /* Remove additional AP mode functionality */
3838                 nl80211_remove_monitor_interface(drv);
3839 #ifndef HOSTAPD
3840                 drv->beacon_set = 0;
3841 #endif /* HOSTAPD */
3842         }
3843
3844         if (ret)
3845                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
3846                            "from %d failed", nlmode, drv->nlmode);
3847
3848         return ret;
3849 }
3850
3851
3852 static int wpa_driver_nl80211_get_capa(void *priv,
3853                                        struct wpa_driver_capa *capa)
3854 {
3855         struct wpa_driver_nl80211_data *drv = priv;
3856         if (!drv->has_capability)
3857                 return -1;
3858         os_memcpy(capa, &drv->capa, sizeof(*capa));
3859         return 0;
3860 }
3861
3862
3863 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3864 {
3865         struct wpa_driver_nl80211_data *drv = priv;
3866
3867         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3868                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3869         drv->operstate = state;
3870         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
3871                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
3872 }
3873
3874
3875 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3876 {
3877         struct wpa_driver_nl80211_data *drv = priv;
3878         struct nl_msg *msg;
3879         struct nl80211_sta_flag_update upd;
3880
3881         msg = nlmsg_alloc();
3882         if (!msg)
3883                 return -ENOMEM;
3884
3885         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3886                     0, NL80211_CMD_SET_STATION, 0);
3887
3888         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3889                     if_nametoindex(drv->ifname));
3890         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3891
3892         os_memset(&upd, 0, sizeof(upd));
3893         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3894         if (authorized)
3895                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3896         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3897
3898         return send_and_recv_msgs(drv, msg, NULL, NULL);
3899  nla_put_failure:
3900         return -ENOBUFS;
3901 }
3902
3903
3904 #ifdef HOSTAPD
3905
3906 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3907                                  int ifindex)
3908 {
3909         struct i802_bss *bss = &drv->bss;
3910         while (bss) {
3911                 if (ifindex == bss->ifindex)
3912                         return bss;
3913                 bss = bss->next;
3914         }
3915         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3916         return NULL;
3917 }
3918
3919
3920 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3921 {
3922         int i;
3923         int *old;
3924
3925         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3926                    ifidx);
3927         for (i = 0; i < drv->num_if_indices; i++) {
3928                 if (drv->if_indices[i] == 0) {
3929                         drv->if_indices[i] = ifidx;
3930                         return;
3931                 }
3932         }
3933
3934         if (drv->if_indices != drv->default_if_indices)
3935                 old = drv->if_indices;
3936         else
3937                 old = NULL;
3938
3939         drv->if_indices = os_realloc(old,
3940                                      sizeof(int) * (drv->num_if_indices + 1));
3941         if (!drv->if_indices) {
3942                 if (!old)
3943                         drv->if_indices = drv->default_if_indices;
3944                 else
3945                         drv->if_indices = old;
3946                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3947                            "interfaces");
3948                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3949                 return;
3950         }
3951         drv->if_indices[drv->num_if_indices] = ifidx;
3952         drv->num_if_indices++;
3953 }
3954
3955
3956 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3957 {
3958         int i;
3959
3960         for (i = 0; i < drv->num_if_indices; i++) {
3961                 if (drv->if_indices[i] == ifidx) {
3962                         drv->if_indices[i] = 0;
3963                         break;
3964                 }
3965         }
3966 }
3967
3968
3969 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3970 {
3971         int i;
3972
3973         for (i = 0; i < drv->num_if_indices; i++)
3974                 if (drv->if_indices[i] == ifidx)
3975                         return 1;
3976
3977         return 0;
3978 }
3979
3980
3981 static inline int min_int(int a, int b)
3982 {
3983         if (a < b)
3984                 return a;
3985         return b;
3986 }
3987
3988
3989 static int get_key_handler(struct nl_msg *msg, void *arg)
3990 {
3991         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3992         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3993
3994         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3995                   genlmsg_attrlen(gnlh, 0), NULL);
3996
3997         /*
3998          * TODO: validate the key index and mac address!
3999          * Otherwise, there's a race condition as soon as
4000          * the kernel starts sending key notifications.
4001          */
4002
4003         if (tb[NL80211_ATTR_KEY_SEQ])
4004                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
4005                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
4006         return NL_SKIP;
4007 }
4008
4009
4010 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
4011                            int idx, u8 *seq)
4012 {
4013         struct wpa_driver_nl80211_data *drv = priv;
4014         struct nl_msg *msg;
4015
4016         msg = nlmsg_alloc();
4017         if (!msg)
4018                 return -ENOMEM;
4019
4020         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4021                     0, NL80211_CMD_GET_KEY, 0);
4022
4023         if (addr)
4024                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4025         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
4026         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
4027
4028         memset(seq, 0, 6);
4029
4030         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
4031  nla_put_failure:
4032         return -ENOBUFS;
4033 }
4034
4035
4036 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
4037                               int mode)
4038 {
4039         struct wpa_driver_nl80211_data *drv = priv;
4040         struct nl_msg *msg;
4041         u8 rates[NL80211_MAX_SUPP_RATES];
4042         u8 rates_len = 0;
4043         int i;
4044
4045         msg = nlmsg_alloc();
4046         if (!msg)
4047                 return -ENOMEM;
4048
4049         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4050                     NL80211_CMD_SET_BSS, 0);
4051
4052         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
4053                 rates[rates_len++] = basic_rates[i] / 5;
4054
4055         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
4056
4057         /* TODO: multi-BSS support */
4058         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4059
4060         return send_and_recv_msgs(drv, msg, NULL, NULL);
4061  nla_put_failure:
4062         return -ENOBUFS;
4063 }
4064
4065
4066 /* Set kernel driver on given frequency (MHz) */
4067 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4068 {
4069         struct wpa_driver_nl80211_data *drv = priv;
4070         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4071                                            freq->sec_channel_offset);
4072 }
4073
4074
4075 static int i802_set_rts(void *priv, int rts)
4076 {
4077         struct wpa_driver_nl80211_data *drv = priv;
4078         struct nl_msg *msg;
4079         int ret = -ENOBUFS;
4080         u32 val;
4081
4082         msg = nlmsg_alloc();
4083         if (!msg)
4084                 return -ENOMEM;
4085
4086         if (rts >= 2347)
4087                 val = (u32) -1;
4088         else
4089                 val = rts;
4090
4091         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4092                     0, NL80211_CMD_SET_WIPHY, 0);
4093         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4094         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4095
4096         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4097         if (!ret)
4098                 return 0;
4099 nla_put_failure:
4100         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4101                    "%d (%s)", rts, ret, strerror(-ret));
4102         return ret;
4103 }
4104
4105
4106 static int i802_set_frag(void *priv, int frag)
4107 {
4108         struct wpa_driver_nl80211_data *drv = priv;
4109         struct nl_msg *msg;
4110         int ret = -ENOBUFS;
4111         u32 val;
4112
4113         msg = nlmsg_alloc();
4114         if (!msg)
4115                 return -ENOMEM;
4116
4117         if (frag >= 2346)
4118                 val = (u32) -1;
4119         else
4120                 val = frag;
4121
4122         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4123                     0, NL80211_CMD_SET_WIPHY, 0);
4124         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4125         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4126
4127         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4128         if (!ret)
4129                 return 0;
4130 nla_put_failure:
4131         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4132                    "%d: %d (%s)", frag, ret, strerror(-ret));
4133         return ret;
4134 }
4135
4136
4137 static int i802_flush(void *priv)
4138 {
4139         struct wpa_driver_nl80211_data *drv = priv;
4140         struct nl_msg *msg;
4141
4142         msg = nlmsg_alloc();
4143         if (!msg)
4144                 return -1;
4145
4146         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4147                     0, NL80211_CMD_DEL_STATION, 0);
4148
4149         /*
4150          * XXX: FIX! this needs to flush all VLANs too
4151          */
4152         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4153                     if_nametoindex(drv->ifname));
4154
4155         return send_and_recv_msgs(drv, msg, NULL, NULL);
4156  nla_put_failure:
4157         return -ENOBUFS;
4158 }
4159
4160
4161 static int get_sta_handler(struct nl_msg *msg, void *arg)
4162 {
4163         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4164         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4165         struct hostap_sta_driver_data *data = arg;
4166         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4167         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4168                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4169                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4170                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4171                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4172                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4173         };
4174
4175         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4176                   genlmsg_attrlen(gnlh, 0), NULL);
4177
4178         /*
4179          * TODO: validate the interface and mac address!
4180          * Otherwise, there's a race condition as soon as
4181          * the kernel starts sending station notifications.
4182          */
4183
4184         if (!tb[NL80211_ATTR_STA_INFO]) {
4185                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4186                 return NL_SKIP;
4187         }
4188         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4189                              tb[NL80211_ATTR_STA_INFO],
4190                              stats_policy)) {
4191                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4192                 return NL_SKIP;
4193         }
4194
4195         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4196                 data->inactive_msec =
4197                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4198         if (stats[NL80211_STA_INFO_RX_BYTES])
4199                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4200         if (stats[NL80211_STA_INFO_TX_BYTES])
4201                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4202         if (stats[NL80211_STA_INFO_RX_PACKETS])
4203                 data->rx_packets =
4204                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4205         if (stats[NL80211_STA_INFO_TX_PACKETS])
4206                 data->tx_packets =
4207                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4208
4209         return NL_SKIP;
4210 }
4211
4212 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4213                               const u8 *addr)
4214 {
4215         struct wpa_driver_nl80211_data *drv = priv;
4216         struct nl_msg *msg;
4217
4218         os_memset(data, 0, sizeof(*data));
4219         msg = nlmsg_alloc();
4220         if (!msg)
4221                 return -ENOMEM;
4222
4223         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4224                     0, NL80211_CMD_GET_STATION, 0);
4225
4226         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4227         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4228
4229         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4230  nla_put_failure:
4231         return -ENOBUFS;
4232 }
4233
4234
4235 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4236                                     int cw_min, int cw_max, int burst_time)
4237 {
4238         struct wpa_driver_nl80211_data *drv = priv;
4239         struct nl_msg *msg;
4240         struct nlattr *txq, *params;
4241
4242         msg = nlmsg_alloc();
4243         if (!msg)
4244                 return -1;
4245
4246         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4247                     0, NL80211_CMD_SET_WIPHY, 0);
4248
4249         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4250
4251         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4252         if (!txq)
4253                 goto nla_put_failure;
4254
4255         /* We are only sending parameters for a single TXQ at a time */
4256         params = nla_nest_start(msg, 1);
4257         if (!params)
4258                 goto nla_put_failure;
4259
4260         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4261         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4262          * 32 usec, so need to convert the value here. */
4263         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4264         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4265         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4266         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4267
4268         nla_nest_end(msg, params);
4269
4270         nla_nest_end(msg, txq);
4271
4272         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4273                 return 0;
4274  nla_put_failure:
4275         return -1;
4276 }
4277
4278
4279 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4280 {
4281         struct wpa_driver_nl80211_data *drv = priv;
4282         struct nl_msg *msg;
4283
4284         msg = nlmsg_alloc();
4285         if (!msg)
4286                 return -ENOMEM;
4287
4288         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4289                     NL80211_CMD_SET_BSS, 0);
4290
4291         if (cts >= 0)
4292                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4293         if (preamble >= 0)
4294                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4295         if (slot >= 0)
4296                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4297
4298         /* TODO: multi-BSS support */
4299         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4300
4301         return send_and_recv_msgs(drv, msg, NULL, NULL);
4302  nla_put_failure:
4303         return -ENOBUFS;
4304 }
4305
4306
4307 static int i802_set_cts_protect(void *priv, int value)
4308 {
4309         return i802_set_bss(priv, value, -1, -1);
4310 }
4311
4312
4313 static int i802_set_preamble(void *priv, int value)
4314 {
4315         return i802_set_bss(priv, -1, value, -1);
4316 }
4317
4318
4319 static int i802_set_short_slot_time(void *priv, int value)
4320 {
4321         return i802_set_bss(priv, -1, -1, value);
4322 }
4323
4324
4325 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4326                              const char *ifname, int vlan_id)
4327 {
4328         struct wpa_driver_nl80211_data *drv = priv;
4329         struct nl_msg *msg;
4330
4331         msg = nlmsg_alloc();
4332         if (!msg)
4333                 return -ENOMEM;
4334
4335         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4336                     0, NL80211_CMD_SET_STATION, 0);
4337
4338         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4339                     if_nametoindex(drv->ifname));
4340         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4341         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4342                     if_nametoindex(ifname));
4343
4344         return send_and_recv_msgs(drv, msg, NULL, NULL);
4345  nla_put_failure:
4346         return -ENOBUFS;
4347 }
4348
4349
4350 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4351 {
4352         struct wpa_driver_nl80211_data *drv = priv;
4353         char name[IFNAMSIZ + 1];
4354
4355         os_snprintf(name, sizeof(name), "%s.sta%d", drv->ifname, aid);
4356         wpa_printf(MSG_DEBUG, "nl80211: Set WDS STA addr=" MACSTR
4357                    " aid=%d val=%d name=%s", MAC2STR(addr), aid, val, name);
4358         if (val) {
4359                 if (nl80211_create_iface(priv, name, NL80211_IFTYPE_AP_VLAN,
4360                                          NULL, 1) < 0)
4361                         return -1;
4362                 linux_set_iface_flags(drv->ioctl_sock, name, 1);
4363                 return i802_set_sta_vlan(priv, addr, name, 0);
4364         } else {
4365                 i802_set_sta_vlan(priv, addr, drv->ifname, 0);
4366                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4367                                                     name);
4368         }
4369 }
4370
4371
4372 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4373 {
4374         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4375         struct sockaddr_ll lladdr;
4376         unsigned char buf[3000];
4377         int len;
4378         socklen_t fromlen = sizeof(lladdr);
4379
4380         len = recvfrom(sock, buf, sizeof(buf), 0,
4381                        (struct sockaddr *)&lladdr, &fromlen);
4382         if (len < 0) {
4383                 perror("recv");
4384                 return;
4385         }
4386
4387         if (have_ifidx(drv, lladdr.sll_ifindex))
4388                 drv_event_eapol_rx(drv->ctx, lladdr.sll_addr, buf, len);
4389 }
4390
4391
4392 static int i802_get_inact_sec(void *priv, const u8 *addr)
4393 {
4394         struct hostap_sta_driver_data data;
4395         int ret;
4396
4397         data.inactive_msec = (unsigned long) -1;
4398         ret = i802_read_sta_data(priv, &data, addr);
4399         if (ret || data.inactive_msec == (unsigned long) -1)
4400                 return -1;
4401         return data.inactive_msec / 1000;
4402 }
4403
4404
4405 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4406 {
4407 #if 0
4408         /* TODO */
4409 #endif
4410         return 0;
4411 }
4412
4413
4414 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4415                            int reason)
4416 {
4417         struct wpa_driver_nl80211_data *drv = priv;
4418         struct ieee80211_mgmt mgmt;
4419
4420         memset(&mgmt, 0, sizeof(mgmt));
4421         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4422                                           WLAN_FC_STYPE_DEAUTH);
4423         memcpy(mgmt.da, addr, ETH_ALEN);
4424         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4425         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4426         mgmt.u.deauth.reason_code = host_to_le16(reason);
4427         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4428                                             IEEE80211_HDRLEN +
4429                                             sizeof(mgmt.u.deauth));
4430 }
4431
4432
4433 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4434                              int reason)
4435 {
4436         struct wpa_driver_nl80211_data *drv = priv;
4437         struct ieee80211_mgmt mgmt;
4438
4439         memset(&mgmt, 0, sizeof(mgmt));
4440         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4441                                           WLAN_FC_STYPE_DISASSOC);
4442         memcpy(mgmt.da, addr, ETH_ALEN);
4443         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4444         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4445         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4446         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4447                                             IEEE80211_HDRLEN +
4448                                             sizeof(mgmt.u.disassoc));
4449 }
4450
4451
4452 static int i802_check_bridge(struct wpa_driver_nl80211_data *drv,
4453                              const char *brname, const char *ifname)
4454 {
4455         int ifindex;
4456         char in_br[IFNAMSIZ];
4457
4458         os_strlcpy(drv->brname, brname, IFNAMSIZ);
4459         ifindex = if_nametoindex(brname);
4460         if (ifindex == 0) {
4461                 /*
4462                  * Bridge was configured, but the bridge device does
4463                  * not exist. Try to add it now.
4464                  */
4465                 if (linux_br_add(drv->ioctl_sock, brname) < 0) {
4466                         wpa_printf(MSG_ERROR, "nl80211: Failed to add the "
4467                                    "bridge interface %s: %s",
4468                                    brname, strerror(errno));
4469                         return -1;
4470                 }
4471                 drv->added_bridge = 1;
4472                 add_ifidx(drv, if_nametoindex(brname));
4473         }
4474
4475         if (linux_br_get(in_br, ifname) == 0) {
4476                 if (os_strcmp(in_br, brname) == 0)
4477                         return 0; /* already in the bridge */
4478
4479                 wpa_printf(MSG_DEBUG, "nl80211: Removing interface %s from "
4480                            "bridge %s", ifname, in_br);
4481                 if (linux_br_del_if(drv->ioctl_sock, in_br, ifname) < 0) {
4482                         wpa_printf(MSG_ERROR, "nl80211: Failed to "
4483                                    "remove interface %s from bridge "
4484                                    "%s: %s",
4485                                    ifname, brname, strerror(errno));
4486                         return -1;
4487                 }
4488         }
4489
4490         wpa_printf(MSG_DEBUG, "nl80211: Adding interface %s into bridge %s",
4491                    ifname, brname);
4492         if (linux_br_add_if(drv->ioctl_sock, brname, ifname) < 0) {
4493                 wpa_printf(MSG_ERROR, "nl80211: Failed to add interface %s "
4494                            "into bridge %s: %s",
4495                            ifname, brname, strerror(errno));
4496                 return -1;
4497         }
4498         drv->added_if_into_bridge = 1;
4499
4500         return 0;
4501 }
4502
4503
4504 static void *i802_init(struct hostapd_data *hapd,
4505                        struct wpa_init_params *params)
4506 {
4507         struct wpa_driver_nl80211_data *drv;
4508         size_t i;
4509         char brname[IFNAMSIZ];
4510         int ifindex, br_ifindex;
4511         int br_added = 0;
4512
4513         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4514         if (drv == NULL)
4515                 return NULL;
4516
4517         drv->bss.ifindex = drv->ifindex;
4518
4519         if (linux_br_get(brname, params->ifname) == 0) {
4520                 wpa_printf(MSG_DEBUG, "nl80211: Interface %s is in bridge %s",
4521                            params->ifname, brname);
4522                 br_ifindex = if_nametoindex(brname);
4523         } else {
4524                 brname[0] = '\0';
4525                 br_ifindex = 0;
4526         }
4527
4528         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4529         drv->if_indices = drv->default_if_indices;
4530         for (i = 0; i < params->num_bridge; i++) {
4531                 if (params->bridge[i]) {
4532                         ifindex = if_nametoindex(params->bridge[i]);
4533                         if (ifindex)
4534                                 add_ifidx(drv, ifindex);
4535                         if (ifindex == br_ifindex)
4536                                 br_added = 1;
4537                 }
4538         }
4539         if (!br_added && br_ifindex &&
4540             (params->num_bridge == 0 || !params->bridge[0]))
4541                 add_ifidx(drv, br_ifindex);
4542
4543         /* start listening for EAPOL on the default AP interface */
4544         add_ifidx(drv, drv->ifindex);
4545
4546         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 0))
4547                 goto failed;
4548
4549         if (params->bssid) {
4550                 if (linux_set_ifhwaddr(drv->ioctl_sock, drv->ifname,
4551                                        params->bssid))
4552                         goto failed;
4553         }
4554
4555         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
4556                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4557                            "into AP mode", drv->ifname);
4558                 goto failed;
4559         }
4560
4561         if (params->num_bridge && params->bridge[0] &&
4562             i802_check_bridge(drv, params->bridge[0], params->ifname) < 0)
4563                 goto failed;
4564
4565         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1))
4566                 goto failed;
4567
4568         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4569         if (drv->eapol_sock < 0) {
4570                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4571                 goto failed;
4572         }
4573
4574         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4575         {
4576                 printf("Could not register read socket for eapol\n");
4577                 goto failed;
4578         }
4579
4580         if (linux_get_ifhwaddr(drv->ioctl_sock, drv->ifname, params->own_addr))
4581                 goto failed;
4582
4583         return drv;
4584
4585 failed:
4586         nl80211_remove_monitor_interface(drv);
4587         if (drv->ioctl_sock >= 0)
4588                 close(drv->ioctl_sock);
4589
4590         genl_family_put(drv->nl80211);
4591         nl_cache_free(drv->nl_cache);
4592         nl_handle_destroy(drv->nl_handle);
4593         nl_cb_put(drv->nl_cb);
4594
4595         os_free(drv);
4596         return NULL;
4597 }
4598
4599
4600 static void i802_deinit(void *priv)
4601 {
4602         wpa_driver_nl80211_deinit(priv);
4603 }
4604
4605 #endif /* HOSTAPD */
4606
4607
4608 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4609         enum wpa_driver_if_type type)
4610 {
4611         switch (type) {
4612         case WPA_IF_STATION:
4613                 return NL80211_IFTYPE_STATION;
4614         case WPA_IF_AP_VLAN:
4615                 return NL80211_IFTYPE_AP_VLAN;
4616         case WPA_IF_AP_BSS:
4617                 return NL80211_IFTYPE_AP;
4618         }
4619         return -1;
4620 }
4621
4622
4623 static int wpa_driver_nl80211_if_add(const char *iface, void *priv,
4624                                      enum wpa_driver_if_type type,
4625                                      const char *ifname, const u8 *addr,
4626                                      void *bss_ctx)
4627 {
4628         struct wpa_driver_nl80211_data *drv = priv;
4629         int ifidx;
4630 #ifdef HOSTAPD
4631         struct i802_bss *bss = NULL;
4632
4633         if (type == WPA_IF_AP_BSS) {
4634                 bss = os_zalloc(sizeof(*bss));
4635                 if (bss == NULL)
4636                         return -1;
4637         }
4638 #endif /* HOSTAPD */
4639
4640         ifidx = nl80211_create_iface(drv, ifname,
4641                                      wpa_driver_nl80211_if_type(type), addr,
4642                                      0);
4643         if (ifidx < 0) {
4644 #ifdef HOSTAPD
4645                 os_free(bss);
4646 #endif /* HOSTAPD */
4647                 return -1;
4648         }
4649
4650 #ifdef HOSTAPD
4651         if (type == WPA_IF_AP_BSS) {
4652                 if (linux_set_iface_flags(drv->ioctl_sock, ifname, 1)) {
4653                         nl80211_remove_iface(drv, ifidx);
4654                         os_free(bss);
4655                         return -1;
4656                 }
4657                 bss->ifindex = ifidx;
4658                 bss->next = drv->bss.next;
4659                 drv->bss.next = bss;
4660         }
4661 #endif /* HOSTAPD */
4662
4663         return 0;
4664 }
4665
4666
4667 static int wpa_driver_nl80211_if_remove(void *priv,
4668                                         enum wpa_driver_if_type type,
4669                                         const char *ifname)
4670 {
4671         struct wpa_driver_nl80211_data *drv = priv;
4672         int ifindex = if_nametoindex(ifname);
4673
4674         wpa_printf(MSG_DEBUG, "nl80211: %s(type=%d ifname=%s) ifindex=%d",
4675                    __func__, type, ifname, ifindex);
4676         if (ifindex <= 0)
4677                 return -1;
4678         nl80211_remove_iface(drv, ifindex);
4679
4680 #ifdef HOSTAPD
4681         if (type == WPA_IF_AP_BSS) {
4682                 struct i802_bss *bss, *prev;
4683                 prev = &drv->bss;
4684                 bss = drv->bss.next;
4685                 while (bss) {
4686                         if (ifindex == bss->ifindex) {
4687                                 prev->next = bss->next;
4688                                 os_free(bss);
4689                                 break;
4690                         }
4691                         prev = bss;
4692                         bss = bss->next;
4693                 }
4694         }
4695 #endif /* HOSTAPD */
4696
4697         return 0;
4698 }
4699
4700
4701 static int cookie_handler(struct nl_msg *msg, void *arg)
4702 {
4703         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4704         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4705         u64 *cookie = arg;
4706         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4707                   genlmsg_attrlen(gnlh, 0), NULL);
4708         if (tb[NL80211_ATTR_COOKIE])
4709                 *cookie = nla_get_u64(tb[NL80211_ATTR_COOKIE]);
4710         return NL_SKIP;
4711 }
4712
4713
4714 static int wpa_driver_nl80211_send_action(void *priv, unsigned int freq,
4715                                           const u8 *dst, const u8 *src,
4716                                           const u8 *bssid,
4717                                           const u8 *data, size_t data_len)
4718 {
4719         struct wpa_driver_nl80211_data *drv = priv;
4720         int ret = -1;
4721         struct nl_msg *msg;
4722         u8 *buf;
4723         struct ieee80211_hdr *hdr;
4724         u64 cookie;
4725
4726         wpa_printf(MSG_DEBUG, "nl80211: Send Action frame (ifindex=%d)",
4727                    drv->ifindex);
4728
4729         buf = os_zalloc(24 + data_len);
4730         if (buf == NULL)
4731                 return ret;
4732         os_memcpy(buf + 24, data, data_len);
4733         hdr = (struct ieee80211_hdr *) buf;
4734         hdr->frame_control =
4735                 IEEE80211_FC(WLAN_FC_TYPE_MGMT, WLAN_FC_STYPE_ACTION);
4736         os_memcpy(hdr->addr1, dst, ETH_ALEN);
4737         os_memcpy(hdr->addr2, src, ETH_ALEN);
4738         os_memcpy(hdr->addr3, bssid, ETH_ALEN);
4739
4740         if (drv->nlmode == NL80211_IFTYPE_AP) {
4741                 ret = wpa_driver_nl80211_send_mlme(priv, buf, 24 + data_len);
4742                 os_free(buf);
4743                 return ret;
4744         }
4745
4746         msg = nlmsg_alloc();
4747         if (!msg)
4748                 return -1;
4749
4750         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4751                     NL80211_CMD_ACTION, 0);
4752
4753         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4754         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4755         NLA_PUT(msg, NL80211_ATTR_FRAME, 24 + data_len, buf);
4756         os_free(buf);
4757
4758         cookie = 0;
4759         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
4760         msg = NULL;
4761         if (ret) {
4762                 wpa_printf(MSG_DEBUG, "nl80211: Action command failed: ret=%d "
4763                            "(%s)", ret, strerror(-ret));
4764                 goto nla_put_failure;
4765         }
4766         wpa_printf(MSG_DEBUG, "nl80211: Action TX command accepted; "
4767                    "cookie 0x%llx", (long long unsigned int) cookie);
4768         drv->send_action_cookie = cookie;
4769         drv->pending_send_action = 1;
4770         ret = 0;
4771
4772 nla_put_failure:
4773         nlmsg_free(msg);
4774         return ret;
4775 }
4776
4777
4778 static int wpa_driver_nl80211_remain_on_channel(void *priv, unsigned int freq,
4779                                                 unsigned int duration)
4780 {
4781         struct wpa_driver_nl80211_data *drv = priv;
4782         struct nl_msg *msg;
4783         int ret;
4784         u64 cookie;
4785
4786         msg = nlmsg_alloc();
4787         if (!msg)
4788                 return -1;
4789
4790         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4791                     NL80211_CMD_REMAIN_ON_CHANNEL, 0);
4792
4793         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4794         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
4795         NLA_PUT_U32(msg, NL80211_ATTR_DURATION, duration);
4796
4797         cookie = 0;
4798         ret = send_and_recv_msgs(drv, msg, cookie_handler, &cookie);
4799         if (ret == 0) {
4800                 wpa_printf(MSG_DEBUG, "nl80211: Remain-on-channel cookie "
4801                            "0x%llx for freq=%u MHz duration=%u",
4802                            (long long unsigned int) cookie, freq, duration);
4803                 drv->remain_on_chan_cookie = cookie;
4804                 return 0;
4805         }
4806         wpa_printf(MSG_DEBUG, "nl80211: Failed to request remain-on-channel "
4807                    "(freq=%d): %d (%s)", freq, ret, strerror(-ret));
4808 nla_put_failure:
4809         return -1;
4810 }
4811
4812
4813 static int wpa_driver_nl80211_cancel_remain_on_channel(void *priv)
4814 {
4815         struct wpa_driver_nl80211_data *drv = priv;
4816         struct nl_msg *msg;
4817         int ret;
4818
4819         if (!drv->pending_remain_on_chan) {
4820                 wpa_printf(MSG_DEBUG, "nl80211: No pending remain-on-channel "
4821                            "to cancel");
4822                 return -1;
4823         }
4824
4825         wpa_printf(MSG_DEBUG, "nl80211: Cancel remain-on-channel with cookie "
4826                    "0x%llx",
4827                    (long long unsigned int) drv->remain_on_chan_cookie);
4828
4829         msg = nlmsg_alloc();
4830         if (!msg)
4831                 return -1;
4832
4833         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4834                     NL80211_CMD_CANCEL_REMAIN_ON_CHANNEL, 0);
4835
4836         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4837         NLA_PUT_U64(msg, NL80211_ATTR_COOKIE, drv->remain_on_chan_cookie);
4838
4839         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4840         if (ret == 0)
4841                 return 0;
4842         wpa_printf(MSG_DEBUG, "nl80211: Failed to cancel remain-on-channel: "
4843                    "%d (%s)", ret, strerror(-ret));
4844 nla_put_failure:
4845         return -1;
4846 }
4847
4848
4849 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
4850                                                         void *timeout_ctx)
4851 {
4852         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4853         if (drv->monitor_ifidx < 0)
4854                 return; /* monitor interface already removed */
4855
4856         if (drv->nlmode != NL80211_IFTYPE_STATION)
4857                 return; /* not in station mode anymore */
4858
4859         if (drv->probe_req_report)
4860                 return; /* reporting enabled */
4861
4862         wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
4863                    "Probe Request reporting needed anymore");
4864         nl80211_remove_monitor_interface(drv);
4865 }
4866
4867
4868 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
4869 {
4870         struct wpa_driver_nl80211_data *drv = priv;
4871
4872         if (drv->nlmode != NL80211_IFTYPE_STATION) {
4873                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
4874                            "allowed in station mode (iftype=%d)",
4875                            drv->nlmode);
4876                 return -1;
4877         }
4878         drv->probe_req_report = report;
4879
4880         if (report) {
4881                 eloop_cancel_timeout(
4882                         wpa_driver_nl80211_probe_req_report_timeout,
4883                         drv, NULL);
4884                 if (drv->monitor_ifidx < 0 &&
4885                     nl80211_create_monitor_interface(drv))
4886                         return -1;
4887         } else {
4888                 /*
4889                  * It takes a while to remove the monitor interface, so try to
4890                  * avoid doing this if it is needed again shortly. Instead,
4891                  * schedule the interface to be removed later if no need for it
4892                  * is seen.
4893                  */
4894                 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
4895                            "to be removed after 10 seconds of no use");
4896                 eloop_register_timeout(
4897                         10, 0, wpa_driver_nl80211_probe_req_report_timeout,
4898                         drv, NULL);
4899         }
4900
4901         return 0;
4902 }
4903
4904
4905 static int wpa_driver_nl80211_alloc_interface_addr(void *priv, u8 *addr,
4906                                                    char *ifname)
4907 {
4908         struct wpa_driver_nl80211_data *drv = priv;
4909
4910         if (ifname)
4911                 ifname[0] = '\0';
4912
4913         if (linux_get_ifhwaddr(drv->ioctl_sock, drv->ifname, addr) < 0)
4914                 return -1;
4915
4916         if (addr[0] & 0x02) {
4917                 /* TODO: add support for generating multiple addresses */
4918                 addr[0] ^= 0x80;
4919         } else
4920                 addr[0] = 0x02; /* locally administered */
4921
4922         return 0;
4923 }
4924
4925
4926 static void wpa_driver_nl80211_release_interface_addr(void *priv,
4927                                                       const u8 *addr)
4928 {
4929         /* TODO: keep list of allocated address and release them here */
4930 }
4931
4932
4933 static int nl80211_disable_11b_rates(struct wpa_driver_nl80211_data *drv,
4934                                      int ifindex, int disabled)
4935 {
4936         struct nl_msg *msg;
4937         struct nlattr *bands, *band;
4938         int ret;
4939
4940         msg = nlmsg_alloc();
4941         if (!msg)
4942                 return -1;
4943
4944         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4945                     NL80211_CMD_SET_TX_BITRATE_MASK, 0);
4946         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
4947
4948         bands = nla_nest_start(msg, NL80211_ATTR_TX_RATES);
4949         if (!bands)
4950                 goto nla_put_failure;
4951
4952         /*
4953          * Disable 2 GHz rates 1, 2, 5.5, 11 Mbps by masking out everything
4954          * else apart from 6, 9, 12, 18, 24, 36, 48, 54 Mbps from non-MCS
4955          * rates. All 5 GHz rates are left enabled.
4956          */
4957         band = nla_nest_start(msg, NL80211_BAND_2GHZ);
4958         if (!band)
4959                 goto nla_put_failure;
4960         NLA_PUT(msg, NL80211_TXRATE_LEGACY, 8,
4961                 "\x0c\x12\x18\x24\x30\x48\x60\x6c");
4962         nla_nest_end(msg, band);
4963
4964         nla_nest_end(msg, bands);
4965
4966         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4967         msg = NULL;
4968         if (ret) {
4969                 wpa_printf(MSG_DEBUG, "nl80211: Set TX rates failed: ret=%d "
4970                            "(%s)", ret, strerror(-ret));
4971         }
4972
4973         return ret;
4974
4975 nla_put_failure:
4976         nlmsg_free(msg);
4977         return -1;
4978 }
4979
4980
4981 static int wpa_driver_nl80211_disable_11b_rates(void *priv, int disabled)
4982 {
4983         struct wpa_driver_nl80211_data *drv = priv;
4984         drv->disable_11b_rates = disabled;
4985         return nl80211_disable_11b_rates(drv, drv->ifindex, disabled);
4986 }
4987
4988
4989 static int wpa_driver_nl80211_deinit_ap(void *priv)
4990 {
4991         struct wpa_driver_nl80211_data *drv = priv;
4992         if (drv->nlmode != NL80211_IFTYPE_AP)
4993                 return -1;
4994         wpa_driver_nl80211_del_beacon(drv);
4995         return wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
4996 }
4997
4998
4999 static void wpa_driver_nl80211_resume(void *priv)
5000 {
5001         struct wpa_driver_nl80211_data *drv = priv;
5002         if (linux_set_iface_flags(drv->ioctl_sock, drv->ifname, 1)) {
5003                 wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface up on "
5004                            "resume event");
5005         }
5006 }
5007
5008
5009 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5010         .name = "nl80211",
5011         .desc = "Linux nl80211/cfg80211",
5012         .get_bssid = wpa_driver_nl80211_get_bssid,
5013         .get_ssid = wpa_driver_nl80211_get_ssid,
5014         .set_key = wpa_driver_nl80211_set_key,
5015         .scan2 = wpa_driver_nl80211_scan,
5016         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5017         .deauthenticate = wpa_driver_nl80211_deauthenticate,
5018         .disassociate = wpa_driver_nl80211_disassociate,
5019         .authenticate = wpa_driver_nl80211_authenticate,
5020         .associate = wpa_driver_nl80211_associate,
5021         .init = wpa_driver_nl80211_init,
5022         .deinit = wpa_driver_nl80211_deinit,
5023         .get_capa = wpa_driver_nl80211_get_capa,
5024         .set_operstate = wpa_driver_nl80211_set_operstate,
5025         .set_supp_port = wpa_driver_nl80211_set_supp_port,
5026         .set_country = wpa_driver_nl80211_set_country,
5027         .set_beacon = wpa_driver_nl80211_set_beacon,
5028         .if_add = wpa_driver_nl80211_if_add,
5029         .if_remove = wpa_driver_nl80211_if_remove,
5030         .send_mlme = wpa_driver_nl80211_send_mlme,
5031         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5032         .sta_add = wpa_driver_nl80211_sta_add,
5033         .sta_remove = wpa_driver_nl80211_sta_remove,
5034         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
5035         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
5036 #ifdef HOSTAPD
5037         .hapd_init = i802_init,
5038         .hapd_deinit = i802_deinit,
5039         .get_seqnum = i802_get_seqnum,
5040         .flush = i802_flush,
5041         .read_sta_data = i802_read_sta_data,
5042         .sta_deauth = i802_sta_deauth,
5043         .sta_disassoc = i802_sta_disassoc,
5044         .get_inact_sec = i802_get_inact_sec,
5045         .sta_clear_stats = i802_sta_clear_stats,
5046         .set_freq = i802_set_freq,
5047         .set_rts = i802_set_rts,
5048         .set_frag = i802_set_frag,
5049         .set_rate_sets = i802_set_rate_sets,
5050         .set_cts_protect = i802_set_cts_protect,
5051         .set_preamble = i802_set_preamble,
5052         .set_short_slot_time = i802_set_short_slot_time,
5053         .set_tx_queue_params = i802_set_tx_queue_params,
5054         .set_sta_vlan = i802_set_sta_vlan,
5055         .set_wds_sta = i802_set_wds_sta,
5056 #endif /* HOSTAPD */
5057         .send_action = wpa_driver_nl80211_send_action,
5058         .remain_on_channel = wpa_driver_nl80211_remain_on_channel,
5059         .cancel_remain_on_channel =
5060         wpa_driver_nl80211_cancel_remain_on_channel,
5061         .probe_req_report = wpa_driver_nl80211_probe_req_report,
5062         .alloc_interface_addr = wpa_driver_nl80211_alloc_interface_addr,
5063         .release_interface_addr = wpa_driver_nl80211_release_interface_addr,
5064         .disable_11b_rates = wpa_driver_nl80211_disable_11b_rates,
5065         .deinit_ap = wpa_driver_nl80211_deinit_ap,
5066         .resume = wpa_driver_nl80211_resume,
5067 };