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, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if_arp.h>
  22 #include <net/if.h>
  23 #include <netlink/genl/genl.h>
  24 #include <netlink/genl/family.h>
  25 #include <netlink/genl/ctrl.h>
  26 #include <netpacket/packet.h>
  27 #include <linux/filter.h>
  28 #include "nl80211_copy.h"
  29
  30 #include "common.h"
  31 #include "eloop.h"
  32 #include "common/ieee802_11_defs.h"
  33 #include "netlink.h"
  34 #include "radiotap.h"
  35 #include "radiotap_iter.h"
  36 #include "driver.h"
  37
  38 #ifdef CONFIG_LIBNL20
  39 /* libnl 2.0 compatibility code */
  40 #define nl_handle nl_sock
  41 #define nl_handle_alloc_cb nl_socket_alloc_cb
  42 #define nl_handle_destroy nl_socket_free
  43 #endif /* CONFIG_LIBNL20 */
  44
  45
  46 #ifndef IFF_LOWER_UP
  47 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  48 #endif
  49 #ifndef IFF_DORMANT
  50 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  51 #endif
  52
  53 #ifndef IF_OPER_DORMANT
  54 #define IF_OPER_DORMANT 5
  55 #endif
  56 #ifndef IF_OPER_UP
  57 #define IF_OPER_UP 6
  58 #endif
  59
  60 struct i802_bss {
  61         struct i802_bss *next;
  62         int ifindex;
  63         unsigned int beacon_set:1;
  64 };
  65
  66 struct wpa_driver_nl80211_data {
  67         void *ctx;
  68         struct netlink_data *netlink;
  69         int ioctl_sock; /* socket for ioctl() use */
  70         char ifname[IFNAMSIZ + 1];
  71         int ifindex;
  72         int if_removed;
  73         struct wpa_driver_capa capa;
  74         int has_capability;
  75
  76         int operstate;
  77
  78         int scan_complete_events;
  79
  80         struct nl_handle *nl_handle;
  81         struct nl_handle *nl_handle_event;
  82         struct nl_cache *nl_cache;
  83         struct nl_cache *nl_cache_event;
  84         struct nl_cb *nl_cb;
  85         struct genl_family *nl80211;
  86
  87         u8 auth_bssid[ETH_ALEN];
  88         u8 bssid[ETH_ALEN];
  89         int associated;
  90         u8 ssid[32];
  91         size_t ssid_len;
  92         int nlmode;
  93         int ap_scan_as_station;
  94         unsigned int assoc_freq;
  95
  96         int monitor_sock;
  97         int monitor_ifidx;
  98         int probe_req_report;
  99
 100         unsigned int beacon_set:1;
 101
 102 #ifdef HOSTAPD
 103         int eapol_sock; /* socket for EAPOL frames */
 104
 105         int default_if_indices[16];
 106         int *if_indices;
 107         int num_if_indices;
 108
 109         struct i802_bss bss;
 110
 111         int last_freq;
 112         int last_freq_ht;
 113 #endif /* HOSTAPD */
 114 };
 115
 116
 117 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 118                                             void *timeout_ctx);
 119 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 120 static int
 121 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 122 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 123                                    const u8 *addr, int cmd, u16 reason_code);
 124 static void nl80211_remove_monitor_interface(
 125         struct wpa_driver_nl80211_data *drv);
 126
 127 #ifdef HOSTAPD
 128 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 129 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 130 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 131                                  int ifindex);
 132 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 133 static int wpa_driver_nl80211_if_remove(void *priv,
 134                                         enum wpa_driver_if_type type,
 135                                         const char *ifname);
 136 #endif /* HOSTAPD */
 137
 138 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
 139                                                         void *timeout_ctx);
 140
 141
 142 /* nl80211 code */
 143 static int ack_handler(struct nl_msg *msg, void *arg)
 144 {
 145         int *err = arg;
 146         *err = 0;
 147         return NL_STOP;
 148 }
 149
 150 static int finish_handler(struct nl_msg *msg, void *arg)
 151 {
 152         int *ret = arg;
 153         *ret = 0;
 154         return NL_SKIP;
 155 }
 156
 157 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 158                          void *arg)
 159 {
 160         int *ret = arg;
 161         *ret = err->error;
 162         return NL_SKIP;
 163 }
 164
 165
 166 static int no_seq_check(struct nl_msg *msg, void *arg)
 167 {
 168         return NL_OK;
 169 }
 170
 171
 172 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 173                               struct nl_msg *msg,
 174                               int (*valid_handler)(struct nl_msg *, void *),
 175                               void *valid_data)
 176 {
 177         struct nl_cb *cb;
 178         int err = -ENOMEM;
 179
 180         cb = nl_cb_clone(drv->nl_cb);
 181         if (!cb)
 182                 goto out;
 183
 184         err = nl_send_auto_complete(drv->nl_handle, msg);
 185         if (err < 0)
 186                 goto out;
 187
 188         err = 1;
 189
 190         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 191         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 192         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 193
 194         if (valid_handler)
 195                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 196                           valid_handler, valid_data);
 197
 198         while (err > 0)
 199                 nl_recvmsgs(drv->nl_handle, cb);
 200  out:
 201         nl_cb_put(cb);
 202         nlmsg_free(msg);
 203         return err;
 204 }
 205
 206
 207 struct family_data {
 208         const char *group;
 209         int id;
 210 };
 211
 212
 213 static int family_handler(struct nl_msg *msg, void *arg)
 214 {
 215         struct family_data *res = arg;
 216         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 217         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 218         struct nlattr *mcgrp;
 219         int i;
 220
 221         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 222                   genlmsg_attrlen(gnlh, 0), NULL);
 223         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 224                 return NL_SKIP;
 225
 226         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 227                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 228                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 229                           nla_len(mcgrp), NULL);
 230                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 231                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 232                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 233                                res->group,
 234                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 235                         continue;
 236                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 237                 break;
 238         };
 239
 240         return NL_SKIP;
 241 }
 242
 243
 244 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 245                                const char *family, const char *group)
 246 {
 247         struct nl_msg *msg;
 248         int ret = -1;
 249         struct family_data res = { group, -ENOENT };
 250
 251         msg = nlmsg_alloc();
 252         if (!msg)
 253                 return -ENOMEM;
 254         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 255                     0, 0, CTRL_CMD_GETFAMILY, 0);
 256         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 257
 258         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 259         msg = NULL;
 260         if (ret == 0)
 261                 ret = res.id;
 262
 263 nla_put_failure:
 264         nlmsg_free(msg);
 265         return ret;
 266 }
 267
 268
 269 #ifdef HOSTAPD
 270 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 271                         const char *ifname, u8 *addr)
 272 {
 273         struct ifreq ifr;
 274
 275         os_memset(&ifr, 0, sizeof(ifr));
 276         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 277         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 278                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 279                            ifname, errno, strerror(errno));
 280                 return -1;
 281         }
 282
 283         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 284                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 285                            ifname, ifr.ifr_hwaddr.sa_family);
 286                 return -1;
 287         }
 288         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 289
 290         return 0;
 291 }
 292
 293
 294 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 295                         const char *ifname, const u8 *addr)
 296 {
 297         struct ifreq ifr;
 298
 299         os_memset(&ifr, 0, sizeof(ifr));
 300         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 301         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 302         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 303
 304         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 305                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 306                            ifname, errno, strerror(errno));
 307                 return -1;
 308         }
 309
 310         return 0;
 311 }
 312 #endif /* HOSTAPD */
 313
 314
 315 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 316 {
 317         struct wpa_driver_nl80211_data *drv = priv;
 318         if (!drv->associated)
 319                 return -1;
 320         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 321         return 0;
 322 }
 323
 324
 325 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 326 {
 327         struct wpa_driver_nl80211_data *drv = priv;
 328         if (!drv->associated)
 329                 return -1;
 330         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 331         return drv->ssid_len;
 332 }
 333
 334
 335 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 336                                           char *buf, size_t len, int del)
 337 {
 338         union wpa_event_data event;
 339
 340         os_memset(&event, 0, sizeof(event));
 341         if (len > sizeof(event.interface_status.ifname))
 342                 len = sizeof(event.interface_status.ifname) - 1;
 343         os_memcpy(event.interface_status.ifname, buf, len);
 344         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 345                 EVENT_INTERFACE_ADDED;
 346
 347         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 348                    del ? "DEL" : "NEW",
 349                    event.interface_status.ifname,
 350                    del ? "removed" : "added");
 351
 352         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 353                 if (del)
 354                         drv->if_removed = 1;
 355                 else
 356                         drv->if_removed = 0;
 357         }
 358
 359         wpa_supplicant_event(drv->ctx, EVENT_INTERFACE_STATUS, &event);
 360 }
 361
 362
 363 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 364                                          u8 *buf, size_t len)
 365 {
 366         int attrlen, rta_len;
 367         struct rtattr *attr;
 368
 369         attrlen = len;
 370         attr = (struct rtattr *) buf;
 371
 372         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 373         while (RTA_OK(attr, attrlen)) {
 374                 if (attr->rta_type == IFLA_IFNAME) {
 375                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 376                             == 0)
 377                                 return 1;
 378                         else
 379                                 break;
 380                 }
 381                 attr = RTA_NEXT(attr, attrlen);
 382         }
 383
 384         return 0;
 385 }
 386
 387
 388 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 389                                           int ifindex, u8 *buf, size_t len)
 390 {
 391         if (drv->ifindex == ifindex)
 392                 return 1;
 393
 394         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, buf, len)) {
 395                 drv->ifindex = if_nametoindex(drv->ifname);
 396                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 397                            "interface");
 398                 wpa_driver_nl80211_finish_drv_init(drv);
 399                 return 1;
 400         }
 401
 402         return 0;
 403 }
 404
 405
 406 static void wpa_driver_nl80211_event_rtm_newlink(void *ctx,
 407                                                  struct ifinfomsg *ifi,
 408                                                  u8 *buf, size_t len)
 409 {
 410         struct wpa_driver_nl80211_data *drv = ctx;
 411         int attrlen, rta_len;
 412         struct rtattr *attr;
 413
 414         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, buf, len)) {
 415                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 416                            ifi->ifi_index);
 417                 return;
 418         }
 419
 420         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 421                    "(%s%s%s%s)",
 422                    drv->operstate, ifi->ifi_flags,
 423                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 424                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 425                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 426                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 427         /*
 428          * Some drivers send the association event before the operup event--in
 429          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 430          * fails. This will hit us when wpa_supplicant does not need to do
 431          * IEEE 802.1X authentication
 432          */
 433         if (drv->operstate == 1 &&
 434             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 435             !(ifi->ifi_flags & IFF_RUNNING))
 436                 netlink_send_oper_ifla(drv->netlink, drv->ifindex,
 437                                        -1, IF_OPER_UP);
 438
 439         attrlen = len;
 440         attr = (struct rtattr *) buf;
 441         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 442         while (RTA_OK(attr, attrlen)) {
 443                 if (attr->rta_type == IFLA_IFNAME) {
 444                         wpa_driver_nl80211_event_link(
 445                                 drv,
 446                                 ((char *) attr) + rta_len,
 447                                 attr->rta_len - rta_len, 0);
 448                 }
 449                 attr = RTA_NEXT(attr, attrlen);
 450         }
 451 }
 452
 453
 454 static void wpa_driver_nl80211_event_rtm_dellink(void *ctx,
 455                                                  struct ifinfomsg *ifi,
 456                                                  u8 *buf, size_t len)
 457 {
 458         struct wpa_driver_nl80211_data *drv = ctx;
 459         int attrlen, rta_len;
 460         struct rtattr *attr;
 461
 462         attrlen = len;
 463         attr = (struct rtattr *) buf;
 464
 465         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 466         while (RTA_OK(attr, attrlen)) {
 467                 if (attr->rta_type == IFLA_IFNAME) {
 468                         wpa_driver_nl80211_event_link(
 469                                 drv,
 470                                 ((char *) attr) + rta_len,
 471                                 attr->rta_len - rta_len, 1);
 472                 }
 473                 attr = RTA_NEXT(attr, attrlen);
 474         }
 475 }
 476
 477
 478 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 479                             const u8 *frame, size_t len)
 480 {
 481         const struct ieee80211_mgmt *mgmt;
 482         union wpa_event_data event;
 483
 484         mgmt = (const struct ieee80211_mgmt *) frame;
 485         if (len < 24 + sizeof(mgmt->u.auth)) {
 486                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 487                            "frame");
 488                 return;
 489         }
 490
 491         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 492         os_memset(&event, 0, sizeof(event));
 493         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 494         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 495         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 496         if (len > 24 + sizeof(mgmt->u.auth)) {
 497                 event.auth.ies = mgmt->u.auth.variable;
 498                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 499         }
 500
 501         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 502 }
 503
 504
 505 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 506                             const u8 *frame, size_t len)
 507 {
 508         const struct ieee80211_mgmt *mgmt;
 509         union wpa_event_data event;
 510         u16 status;
 511
 512         mgmt = (const struct ieee80211_mgmt *) frame;
 513         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 514                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 515                            "frame");
 516                 return;
 517         }
 518
 519         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 520         if (status != WLAN_STATUS_SUCCESS) {
 521                 os_memset(&event, 0, sizeof(event));
 522                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 523                         event.assoc_reject.resp_ies =
 524                                 (u8 *) mgmt->u.assoc_resp.variable;
 525                         event.assoc_reject.resp_ies_len =
 526                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 527                 }
 528                 event.assoc_reject.status_code = status;
 529
 530                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 531                 return;
 532         }
 533
 534         drv->associated = 1;
 535         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 536
 537         os_memset(&event, 0, sizeof(event));
 538         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 539                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 540                 event.assoc_info.resp_ies_len =
 541                         len - 24 - sizeof(mgmt->u.assoc_resp);
 542         }
 543
 544         event.assoc_info.freq = drv->assoc_freq;
 545
 546         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 547 }
 548
 549
 550 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 551                                enum nl80211_commands cmd, struct nlattr *status,
 552                                struct nlattr *addr, struct nlattr *req_ie,
 553                                struct nlattr *resp_ie)
 554 {
 555         union wpa_event_data event;
 556
 557         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 558                 /*
 559                  * Avoid reporting two association events that would confuse
 560                  * the core code.
 561                  */
 562                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 563                            "when using userspace SME", cmd);
 564                 return;
 565         }
 566
 567         os_memset(&event, 0, sizeof(event));
 568         if (cmd == NL80211_CMD_CONNECT &&
 569             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 570                 if (resp_ie) {
 571                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 572                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 573                 }
 574                 event.assoc_reject.status_code = nla_get_u16(status);
 575                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 576                 return;
 577         }
 578
 579         drv->associated = 1;
 580         if (addr)
 581                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 582
 583         if (req_ie) {
 584                 event.assoc_info.req_ies = nla_data(req_ie);
 585                 event.assoc_info.req_ies_len = nla_len(req_ie);
 586         }
 587         if (resp_ie) {
 588                 event.assoc_info.resp_ies = nla_data(resp_ie);
 589                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 590         }
 591
 592         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 593 }
 594
 595
 596 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 597                                enum nl80211_commands cmd, struct nlattr *addr)
 598 {
 599         union wpa_event_data event;
 600         enum wpa_event_type ev;
 601
 602         if (nla_len(addr) != ETH_ALEN)
 603                 return;
 604
 605         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 606                    cmd, MAC2STR((u8 *) nla_data(addr)));
 607
 608         if (cmd == NL80211_CMD_AUTHENTICATE)
 609                 ev = EVENT_AUTH_TIMED_OUT;
 610         else if (cmd == NL80211_CMD_ASSOCIATE)
 611                 ev = EVENT_ASSOC_TIMED_OUT;
 612         else
 613                 return;
 614
 615         os_memset(&event, 0, sizeof(event));
 616         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 617         wpa_supplicant_event(drv->ctx, ev, &event);
 618 }
 619
 620
 621 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 622                        enum nl80211_commands cmd, struct nlattr *frame,
 623                        struct nlattr *addr, struct nlattr *timed_out)
 624 {
 625         if (timed_out && addr) {
 626                 mlme_timeout_event(drv, cmd, addr);
 627                 return;
 628         }
 629
 630         if (frame == NULL) {
 631                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 632                            "data", cmd);
 633                 return;
 634         }
 635
 636         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 637         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 638                     nla_data(frame), nla_len(frame));
 639
 640         switch (cmd) {
 641         case NL80211_CMD_AUTHENTICATE:
 642                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 643                 break;
 644         case NL80211_CMD_ASSOCIATE:
 645                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 646                 break;
 647         case NL80211_CMD_DEAUTHENTICATE:
 648                 drv->associated = 0;
 649                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 650                 break;
 651         case NL80211_CMD_DISASSOCIATE:
 652                 drv->associated = 0;
 653                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 654                 break;
 655         default:
 656                 break;
 657         }
 658 }
 659
 660
 661 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 662                                            struct nlattr *tb[])
 663 {
 664         union wpa_event_data data;
 665
 666         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 667         os_memset(&data, 0, sizeof(data));
 668         if (tb[NL80211_ATTR_MAC]) {
 669                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 670                             nla_data(tb[NL80211_ATTR_MAC]),
 671                             nla_len(tb[NL80211_ATTR_MAC]));
 672                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 673         }
 674         if (tb[NL80211_ATTR_KEY_SEQ]) {
 675                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 676                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 677                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 678         }
 679         if (tb[NL80211_ATTR_KEY_TYPE]) {
 680                 enum nl80211_key_type key_type =
 681                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 682                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 683                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 684                         data.michael_mic_failure.unicast = 1;
 685         } else
 686                 data.michael_mic_failure.unicast = 1;
 687
 688         if (tb[NL80211_ATTR_KEY_IDX]) {
 689                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 690                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 691         }
 692
 693         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 694 }
 695
 696
 697 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 698                                  struct nlattr *tb[])
 699 {
 700         if (tb[NL80211_ATTR_MAC] == NULL) {
 701                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 702                            "event");
 703                 return;
 704         }
 705         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 706         drv->associated = 1;
 707         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 708                    MAC2STR(drv->bssid));
 709
 710         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 711 }
 712
 713
 714 static void send_scan_event(struct wpa_driver_nl80211_data *drv, int aborted,
 715                             struct nlattr *tb[])
 716 {
 717         union wpa_event_data event;
 718         struct nlattr *nl;
 719         int rem;
 720         struct scan_info *info;
 721 #define MAX_REPORT_FREQS 50
 722         int freqs[MAX_REPORT_FREQS];
 723         int num_freqs = 0;
 724
 725         os_memset(&event, 0, sizeof(event));
 726         info = &event.scan_info;
 727         info->aborted = aborted;
 728
 729         if (tb[NL80211_ATTR_SCAN_SSIDS]) {
 730                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_SSIDS], rem) {
 731                         struct wpa_driver_scan_ssid *s =
 732                                 &info->ssids[info->num_ssids];
 733                         s->ssid = nla_data(nl);
 734                         s->ssid_len = nla_len(nl);
 735                         info->num_ssids++;
 736                         if (info->num_ssids == WPAS_MAX_SCAN_SSIDS)
 737                                 break;
 738                 }
 739         }
 740         if (tb[NL80211_ATTR_SCAN_FREQUENCIES]) {
 741                 nla_for_each_nested(nl, tb[NL80211_ATTR_SCAN_FREQUENCIES], rem)
 742                 {
 743                         freqs[num_freqs] = nla_get_u32(nl);
 744                         num_freqs++;
 745                         if (num_freqs == MAX_REPORT_FREQS - 1)
 746                                 break;
 747                 }
 748                 info->freqs = freqs;
 749                 info->num_freqs = num_freqs;
 750         }
 751         wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, &event);
 752 }
 753
 754
 755 static int process_event(struct nl_msg *msg, void *arg)
 756 {
 757         struct wpa_driver_nl80211_data *drv = arg;
 758         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 759         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 760
 761         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 762                   genlmsg_attrlen(gnlh, 0), NULL);
 763
 764         if (tb[NL80211_ATTR_IFINDEX]) {
 765                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 766                 if (ifindex != drv->ifindex) {
 767                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 768                                    " for foreign interface (ifindex %d)",
 769                                    gnlh->cmd, ifindex);
 770                         return NL_SKIP;
 771                 }
 772         }
 773
 774         if (drv->ap_scan_as_station &&
 775             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 776              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 777                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 778                 drv->ap_scan_as_station = 0;
 779         }
 780
 781         switch (gnlh->cmd) {
 782         case NL80211_CMD_TRIGGER_SCAN:
 783                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 784                 break;
 785         case NL80211_CMD_NEW_SCAN_RESULTS:
 786                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 787                 drv->scan_complete_events = 1;
 788                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 789                                      drv->ctx);
 790                 send_scan_event(drv, 0, tb);
 791                 break;
 792         case NL80211_CMD_SCAN_ABORTED:
 793                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 794                 /*
 795                  * Need to indicate that scan results are available in order
 796                  * not to make wpa_supplicant stop its scanning.
 797                  */
 798                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 799                                      drv->ctx);
 800                 send_scan_event(drv, 1, tb);
 801                 break;
 802         case NL80211_CMD_AUTHENTICATE:
 803         case NL80211_CMD_ASSOCIATE:
 804         case NL80211_CMD_DEAUTHENTICATE:
 805         case NL80211_CMD_DISASSOCIATE:
 806                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 807                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
 808                 break;
 809         case NL80211_CMD_CONNECT:
 810         case NL80211_CMD_ROAM:
 811                 mlme_event_connect(drv, gnlh->cmd,
 812                                    tb[NL80211_ATTR_STATUS_CODE],
 813                                    tb[NL80211_ATTR_MAC],
 814                                    tb[NL80211_ATTR_REQ_IE],
 815                                    tb[NL80211_ATTR_RESP_IE]);
 816                 break;
 817         case NL80211_CMD_DISCONNECT:
 818                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 819                         /*
 820                          * Avoid reporting two disassociation events that could
 821                          * confuse the core code.
 822                          */
 823                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 824                                    "event when using userspace SME");
 825                         break;
 826                 }
 827                 drv->associated = 0;
 828                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 829                 break;
 830         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 831                 mlme_event_michael_mic_failure(drv, tb);
 832                 break;
 833         case NL80211_CMD_JOIN_IBSS:
 834                 mlme_event_join_ibss(drv, tb);
 835                 break;
 836         default:
 837                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 838                            "(cmd=%d)", gnlh->cmd);
 839                 break;
 840         }
 841
 842         return NL_SKIP;
 843 }
 844
 845
 846 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 847                                              void *sock_ctx)
 848 {
 849         struct nl_cb *cb;
 850         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 851
 852         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 853
 854         cb = nl_cb_clone(drv->nl_cb);
 855         if (!cb)
 856                 return;
 857         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 858         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 859         nl_recvmsgs(drv->nl_handle_event, cb);
 860         nl_cb_put(cb);
 861 }
 862
 863
 864 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 865                                    const char *ifname, int dev_up)
 866 {
 867         struct ifreq ifr;
 868
 869         if (drv->ioctl_sock < 0)
 870                 return -1;
 871
 872         os_memset(&ifr, 0, sizeof(ifr));
 873         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 874
 875         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 876                 perror("ioctl[SIOCGIFFLAGS]");
 877                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 878                            ifname);
 879                 return -1;
 880         }
 881
 882         if (dev_up) {
 883                 if (ifr.ifr_flags & IFF_UP)
 884                         return 0;
 885                 ifr.ifr_flags |= IFF_UP;
 886         } else {
 887                 if (!(ifr.ifr_flags & IFF_UP))
 888                         return 0;
 889                 ifr.ifr_flags &= ~IFF_UP;
 890         }
 891
 892         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 893                 perror("ioctl[SIOCSIFFLAGS]");
 894                 return -1;
 895         }
 896
 897         return 0;
 898 }
 899
 900
 901 /**
 902  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 903  * @priv: driver_nl80211 private data
 904  * @alpha2_arg: country to which to switch to
 905  * Returns: 0 on success, -1 on failure
 906  *
 907  * This asks nl80211 to set the regulatory domain for given
 908  * country ISO / IEC alpha2.
 909  */
 910 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 911 {
 912         struct wpa_driver_nl80211_data *drv = priv;
 913         char alpha2[3];
 914         struct nl_msg *msg;
 915
 916         msg = nlmsg_alloc();
 917         if (!msg)
 918                 return -ENOMEM;
 919
 920         alpha2[0] = alpha2_arg[0];
 921         alpha2[1] = alpha2_arg[1];
 922         alpha2[2] = '\0';
 923
 924         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 925                     0, NL80211_CMD_REQ_SET_REG, 0);
 926
 927         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 928         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 929                 return -EINVAL;
 930         return 0;
 931 nla_put_failure:
 932         return -EINVAL;
 933 }
 934
 935
 936 #ifndef HOSTAPD
 937 struct wiphy_info_data {
 938         int max_scan_ssids;
 939         int ap_supported;
 940         int auth_supported;
 941         int connect_supported;
 942 };
 943
 944
 945 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 946 {
 947         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 948         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 949         struct wiphy_info_data *info = arg;
 950
 951         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 952                   genlmsg_attrlen(gnlh, 0), NULL);
 953
 954         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 955                 info->max_scan_ssids =
 956                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 957
 958         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 959                 struct nlattr *nl_mode;
 960                 int i;
 961                 nla_for_each_nested(nl_mode,
 962                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 963                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 964                                 info->ap_supported = 1;
 965                                 break;
 966                         }
 967                 }
 968         }
 969
 970         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
 971                 struct nlattr *nl_cmd;
 972                 int i;
 973
 974                 nla_for_each_nested(nl_cmd,
 975                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
 976                         u32 cmd = nla_get_u32(nl_cmd);
 977                         if (cmd == NL80211_CMD_AUTHENTICATE)
 978                                 info->auth_supported = 1;
 979                         else if (cmd == NL80211_CMD_CONNECT)
 980                                 info->connect_supported = 1;
 981                 }
 982         }
 983
 984         return NL_SKIP;
 985 }
 986
 987
 988 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 989                                        struct wiphy_info_data *info)
 990 {
 991         struct nl_msg *msg;
 992
 993         os_memset(info, 0, sizeof(*info));
 994         msg = nlmsg_alloc();
 995         if (!msg)
 996                 return -1;
 997
 998         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 999                     0, NL80211_CMD_GET_WIPHY, 0);
1000
1001         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1002
1003         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1004                 return 0;
1005         msg = NULL;
1006 nla_put_failure:
1007         nlmsg_free(msg);
1008         return -1;
1009 }
1010
1011
1012 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1013 {
1014         struct wiphy_info_data info;
1015         if (wpa_driver_nl80211_get_info(drv, &info))
1016                 return -1;
1017         drv->has_capability = 1;
1018         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1019         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1020                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1021                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1022                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1023         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1024                 WPA_DRIVER_CAPA_ENC_WEP104 |
1025                 WPA_DRIVER_CAPA_ENC_TKIP |
1026                 WPA_DRIVER_CAPA_ENC_CCMP;
1027         drv->capa.auth = WPA_DRIVER_AUTH_OPEN |
1028                 WPA_DRIVER_AUTH_SHARED |
1029                 WPA_DRIVER_AUTH_LEAP;
1030
1031         drv->capa.max_scan_ssids = info.max_scan_ssids;
1032         if (info.ap_supported)
1033                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1034
1035         if (info.auth_supported)
1036                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1037         else if (!info.connect_supported) {
1038                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1039                            "authentication/association or connect commands");
1040                 return -1;
1041         }
1042
1043         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1044
1045         return 0;
1046 }
1047 #endif /* HOSTAPD */
1048
1049
1050 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1051                                       void *ctx)
1052 {
1053         int ret;
1054
1055         /* Initialize generic netlink and nl80211 */
1056
1057         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1058         if (drv->nl_cb == NULL) {
1059                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1060                            "callbacks");
1061                 goto err1;
1062         }
1063
1064         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1065         if (drv->nl_handle == NULL) {
1066                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1067                            "callbacks");
1068                 goto err2;
1069         }
1070
1071         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1072         if (drv->nl_handle_event == NULL) {
1073                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1074                            "callbacks (event)");
1075                 goto err2b;
1076         }
1077
1078         if (genl_connect(drv->nl_handle)) {
1079                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1080                            "netlink");
1081                 goto err3;
1082         }
1083
1084         if (genl_connect(drv->nl_handle_event)) {
1085                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1086                            "netlink (event)");
1087                 goto err3;
1088         }
1089
1090 #ifdef CONFIG_LIBNL20
1091         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1092                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1093                            "netlink cache");
1094                 goto err3;
1095         }
1096         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1097             0) {
1098                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1099                            "netlink cache (event)");
1100                 goto err3b;
1101         }
1102 #else /* CONFIG_LIBNL20 */
1103         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1104         if (drv->nl_cache == NULL) {
1105                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1106                            "netlink cache");
1107                 goto err3;
1108         }
1109         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1110         if (drv->nl_cache_event == NULL) {
1111                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1112                            "netlink cache (event)");
1113                 goto err3b;
1114         }
1115 #endif /* CONFIG_LIBNL20 */
1116
1117         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1118         if (drv->nl80211 == NULL) {
1119                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1120                            "found");
1121                 goto err4;
1122         }
1123
1124         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1125         if (ret >= 0)
1126                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1127         if (ret < 0) {
1128                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1129                            "membership for scan events: %d (%s)",
1130                            ret, strerror(-ret));
1131                 goto err4;
1132         }
1133
1134         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1135         if (ret >= 0)
1136                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1137         if (ret < 0) {
1138                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1139                            "membership for mlme events: %d (%s)",
1140                            ret, strerror(-ret));
1141                 goto err4;
1142         }
1143
1144         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1145                                  wpa_driver_nl80211_event_receive, drv, ctx);
1146
1147         return 0;
1148
1149 err4:
1150         nl_cache_free(drv->nl_cache_event);
1151 err3b:
1152         nl_cache_free(drv->nl_cache);
1153 err3:
1154         nl_handle_destroy(drv->nl_handle_event);
1155 err2b:
1156         nl_handle_destroy(drv->nl_handle);
1157 err2:
1158         nl_cb_put(drv->nl_cb);
1159 err1:
1160         return -1;
1161 }
1162
1163
1164 /**
1165  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1166  * @ctx: context to be used when calling wpa_supplicant functions,
1167  * e.g., wpa_supplicant_event()
1168  * @ifname: interface name, e.g., wlan0
1169  * Returns: Pointer to private data, %NULL on failure
1170  */
1171 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1172 {
1173         struct wpa_driver_nl80211_data *drv;
1174         struct netlink_config *cfg;
1175
1176         drv = os_zalloc(sizeof(*drv));
1177         if (drv == NULL)
1178                 return NULL;
1179         drv->ctx = ctx;
1180         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1181         drv->monitor_ifidx = -1;
1182         drv->monitor_sock = -1;
1183         drv->ioctl_sock = -1;
1184
1185         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1186                 os_free(drv);
1187                 return NULL;
1188         }
1189
1190         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1191         if (drv->ioctl_sock < 0) {
1192                 perror("socket(PF_INET,SOCK_DGRAM)");
1193                 goto failed;
1194         }
1195
1196         cfg = os_zalloc(sizeof(*cfg));
1197         if (cfg == NULL)
1198                 goto failed;
1199         cfg->ctx = drv;
1200         cfg->newlink_cb = wpa_driver_nl80211_event_rtm_newlink;
1201         cfg->dellink_cb = wpa_driver_nl80211_event_rtm_dellink;
1202         drv->netlink = netlink_init(cfg);
1203         if (drv->netlink == NULL) {
1204                 os_free(cfg);
1205                 goto failed;
1206         }
1207         if (wpa_driver_nl80211_finish_drv_init(drv))
1208                 goto failed;
1209
1210         return drv;
1211
1212 failed:
1213         netlink_deinit(drv->netlink);
1214         if (drv->ioctl_sock >= 0)
1215                 close(drv->ioctl_sock);
1216
1217         genl_family_put(drv->nl80211);
1218         nl_cache_free(drv->nl_cache);
1219         nl_handle_destroy(drv->nl_handle);
1220         nl_cb_put(drv->nl_cb);
1221
1222         os_free(drv);
1223         return NULL;
1224 }
1225
1226
1227 static int
1228 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1229 {
1230         drv->ifindex = if_nametoindex(drv->ifname);
1231
1232 #ifndef HOSTAPD
1233         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1234                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1235                            "use managed mode");
1236         }
1237
1238         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1239                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1240                            "UP", drv->ifname);
1241                 return -1;
1242         }
1243
1244         if (wpa_driver_nl80211_capa(drv))
1245                 return -1;
1246
1247         netlink_send_oper_ifla(drv->netlink, drv->ifindex,
1248                                1, IF_OPER_DORMANT);
1249 #endif /* HOSTAPD */
1250
1251         return 0;
1252 }
1253
1254
1255 #ifdef HOSTAPD
1256 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1257 {
1258         struct i802_bss *bss, *prev;
1259         bss = drv->bss.next;
1260         while (bss) {
1261                 prev = bss;
1262                 bss = bss->next;
1263                 os_free(bss);
1264         }
1265 }
1266 #endif /* HOSTAPD */
1267
1268
1269 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1270 {
1271         struct nl_msg *msg;
1272
1273         msg = nlmsg_alloc();
1274         if (!msg)
1275                 return -ENOMEM;
1276
1277         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1278                     0, NL80211_CMD_DEL_BEACON, 0);
1279         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1280
1281         return send_and_recv_msgs(drv, msg, NULL, NULL);
1282  nla_put_failure:
1283         return -ENOBUFS;
1284 }
1285
1286
1287 /**
1288  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1289  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1290  *
1291  * Shut down driver interface and processing of driver events. Free
1292  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1293  */
1294 static void wpa_driver_nl80211_deinit(void *priv)
1295 {
1296         struct wpa_driver_nl80211_data *drv = priv;
1297
1298         nl80211_remove_monitor_interface(drv);
1299
1300         if (drv->nlmode == NL80211_IFTYPE_AP)
1301                 wpa_driver_nl80211_del_beacon(drv);
1302
1303 #ifdef HOSTAPD
1304         if (drv->last_freq_ht) {
1305                 /* Clear HT flags from the driver */
1306                 struct hostapd_freq_params freq;
1307                 os_memset(&freq, 0, sizeof(freq));
1308                 freq.freq = drv->last_freq;
1309                 i802_set_freq(priv, &freq);
1310         }
1311
1312         if (drv->eapol_sock >= 0) {
1313                 eloop_unregister_read_sock(drv->eapol_sock);
1314                 close(drv->eapol_sock);
1315         }
1316
1317         if (drv->if_indices != drv->default_if_indices)
1318                 os_free(drv->if_indices);
1319
1320         wpa_driver_nl80211_free_bss(drv);
1321 #endif /* HOSTAPD */
1322
1323         netlink_send_oper_ifla(drv->netlink, drv->ifindex, 0, IF_OPER_UP);
1324         netlink_deinit(drv->netlink);
1325
1326         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1327
1328         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1329         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1330
1331         if (drv->ioctl_sock >= 0)
1332                 close(drv->ioctl_sock);
1333
1334         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1335         genl_family_put(drv->nl80211);
1336         nl_cache_free(drv->nl_cache);
1337         nl_cache_free(drv->nl_cache_event);
1338         nl_handle_destroy(drv->nl_handle);
1339         nl_handle_destroy(drv->nl_handle_event);
1340         nl_cb_put(drv->nl_cb);
1341
1342         eloop_cancel_timeout(wpa_driver_nl80211_probe_req_report_timeout,
1343                              drv, NULL);
1344
1345         os_free(drv);
1346 }
1347
1348
1349 /**
1350  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1351  * @eloop_ctx: Driver private data
1352  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1353  *
1354  * This function can be used as registered timeout when starting a scan to
1355  * generate a scan completed event if the driver does not report this.
1356  */
1357 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1358 {
1359         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1360         if (drv->ap_scan_as_station) {
1361                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1362                 drv->ap_scan_as_station = 0;
1363         }
1364         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1365         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1366 }
1367
1368
1369 /**
1370  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1371  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1372  * @params: Scan parameters
1373  * Returns: 0 on success, -1 on failure
1374  */
1375 static int wpa_driver_nl80211_scan(void *priv,
1376                                    struct wpa_driver_scan_params *params)
1377 {
1378         struct wpa_driver_nl80211_data *drv = priv;
1379         int ret = 0, timeout;
1380         struct nl_msg *msg, *ssids, *freqs;
1381         size_t i;
1382
1383         msg = nlmsg_alloc();
1384         ssids = nlmsg_alloc();
1385         freqs = nlmsg_alloc();
1386         if (!msg || !ssids || !freqs) {
1387                 nlmsg_free(msg);
1388                 nlmsg_free(ssids);
1389                 nlmsg_free(freqs);
1390                 return -1;
1391         }
1392
1393         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1394                     NL80211_CMD_TRIGGER_SCAN, 0);
1395
1396         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1397
1398         for (i = 0; i < params->num_ssids; i++) {
1399                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1400                         params->ssids[i].ssid);
1401         }
1402         if (params->num_ssids)
1403                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1404
1405         if (params->extra_ies) {
1406                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1407                         params->extra_ies);
1408         }
1409
1410         if (params->freqs) {
1411                 for (i = 0; params->freqs[i]; i++)
1412                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1413                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1414         }
1415
1416         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1417         msg = NULL;
1418         if (ret) {
1419                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1420                            "(%s)", ret, strerror(-ret));
1421 #ifdef HOSTAPD
1422                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1423                         /*
1424                          * mac80211 does not allow scan requests in AP mode, so
1425                          * try to do this in station mode.
1426                          */
1427                         if (wpa_driver_nl80211_set_mode(drv,
1428                                                         IEEE80211_MODE_INFRA))
1429                                 goto nla_put_failure;
1430
1431                         if (wpa_driver_nl80211_scan(drv, params)) {
1432                                 wpa_driver_nl80211_set_mode(drv,
1433                                                             IEEE80211_MODE_AP);
1434                                 goto nla_put_failure;
1435                         }
1436
1437                         /* Restore AP mode when processing scan results */
1438                         drv->ap_scan_as_station = 1;
1439                         ret = 0;
1440                 } else
1441                         goto nla_put_failure;
1442 #else /* HOSTAPD */
1443                 goto nla_put_failure;
1444 #endif /* HOSTAPD */
1445         }
1446
1447         /* Not all drivers generate "scan completed" wireless event, so try to
1448          * read results after a timeout. */
1449         timeout = 10;
1450         if (drv->scan_complete_events) {
1451                 /*
1452                  * The driver seems to deliver events to notify when scan is
1453                  * complete, so use longer timeout to avoid race conditions
1454                  * with scanning and following association request.
1455                  */
1456                 timeout = 30;
1457         }
1458         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1459                    "seconds", ret, timeout);
1460         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1461         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1462                                drv, drv->ctx);
1463
1464 nla_put_failure:
1465         nlmsg_free(ssids);
1466         nlmsg_free(msg);
1467         nlmsg_free(freqs);
1468         return ret;
1469 }
1470
1471
1472 static int bss_info_handler(struct nl_msg *msg, void *arg)
1473 {
1474         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1475         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1476         struct nlattr *bss[NL80211_BSS_MAX + 1];
1477         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1478                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1479                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1480                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1481                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1482                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1483                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1484                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1485                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1486                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1487                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1488         };
1489         struct wpa_scan_results *res = arg;
1490         struct wpa_scan_res **tmp;
1491         struct wpa_scan_res *r;
1492         const u8 *ie;
1493         size_t ie_len;
1494
1495         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1496                   genlmsg_attrlen(gnlh, 0), NULL);
1497         if (!tb[NL80211_ATTR_BSS])
1498                 return NL_SKIP;
1499         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1500                              bss_policy))
1501                 return NL_SKIP;
1502         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1503                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1504                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1505         } else {
1506                 ie = NULL;
1507                 ie_len = 0;
1508         }
1509
1510         r = os_zalloc(sizeof(*r) + ie_len);
1511         if (r == NULL)
1512                 return NL_SKIP;
1513         if (bss[NL80211_BSS_BSSID])
1514                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1515                           ETH_ALEN);
1516         if (bss[NL80211_BSS_FREQUENCY])
1517                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1518         if (bss[NL80211_BSS_BEACON_INTERVAL])
1519                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1520         if (bss[NL80211_BSS_CAPABILITY])
1521                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1522         r->flags |= WPA_SCAN_NOISE_INVALID;
1523         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1524                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1525                 r->level /= 100; /* mBm to dBm */
1526                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1527         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1528                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1529                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1530         } else
1531                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1532         if (bss[NL80211_BSS_TSF])
1533                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1534         if (bss[NL80211_BSS_SEEN_MS_AGO])
1535                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1536         r->ie_len = ie_len;
1537         if (ie)
1538                 os_memcpy(r + 1, ie, ie_len);
1539
1540         if (bss[NL80211_BSS_STATUS]) {
1541                 enum nl80211_bss_status status;
1542                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1543                 switch (status) {
1544                 case NL80211_BSS_STATUS_AUTHENTICATED:
1545                         r->flags |= WPA_SCAN_AUTHENTICATED;
1546                         break;
1547                 case NL80211_BSS_STATUS_ASSOCIATED:
1548                         r->flags |= WPA_SCAN_ASSOCIATED;
1549                         break;
1550                 default:
1551                         break;
1552                 }
1553         }
1554
1555         tmp = os_realloc(res->res,
1556                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1557         if (tmp == NULL) {
1558                 os_free(r);
1559                 return NL_SKIP;
1560         }
1561         tmp[res->num++] = r;
1562         res->res = tmp;
1563
1564         return NL_SKIP;
1565 }
1566
1567
1568 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1569                                  const u8 *addr)
1570 {
1571         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1572                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1573                            "mismatch");
1574                 wpa_driver_nl80211_mlme(drv, addr,
1575                                         NL80211_CMD_DEAUTHENTICATE,
1576                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1577         }
1578 }
1579
1580
1581 static void wpa_driver_nl80211_check_bss_status(
1582         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1583 {
1584         size_t i;
1585
1586         for (i = 0; i < res->num; i++) {
1587                 struct wpa_scan_res *r = res->res[i];
1588                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1589                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1590                                    "indicates BSS status with " MACSTR
1591                                    " as authenticated",
1592                                    MAC2STR(r->bssid));
1593                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1594                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1595                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1596                             0) {
1597                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1598                                            " in local state (auth=" MACSTR
1599                                            " assoc=" MACSTR ")",
1600                                            MAC2STR(drv->auth_bssid),
1601                                            MAC2STR(drv->bssid));
1602                         }
1603                 }
1604
1605                 if (r->flags & WPA_SCAN_ASSOCIATED) {
1606                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1607                                    "indicate BSS status with " MACSTR
1608                                    " as associated",
1609                                    MAC2STR(r->bssid));
1610                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1611                             !drv->associated) {
1612                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1613                                            "(not associated) does not match "
1614                                            "with BSS state");
1615                                 clear_state_mismatch(drv, r->bssid);
1616                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1617                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1618                                    0) {
1619                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1620                                            "(associated with " MACSTR ") does "
1621                                            "not match with BSS state",
1622                                            MAC2STR(drv->bssid));
1623                                 clear_state_mismatch(drv, r->bssid);
1624                                 clear_state_mismatch(drv, drv->bssid);
1625                         }
1626                 }
1627         }
1628 }
1629
1630
1631 /**
1632  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1633  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1634  * Returns: Scan results on success, -1 on failure
1635  */
1636 static struct wpa_scan_results *
1637 wpa_driver_nl80211_get_scan_results(void *priv)
1638 {
1639         struct wpa_driver_nl80211_data *drv = priv;
1640         struct nl_msg *msg;
1641         struct wpa_scan_results *res;
1642         int ret;
1643
1644         res = os_zalloc(sizeof(*res));
1645         if (res == NULL)
1646                 return NULL;
1647         msg = nlmsg_alloc();
1648         if (!msg)
1649                 goto nla_put_failure;
1650
1651         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1652                     NL80211_CMD_GET_SCAN, 0);
1653         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1654
1655         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1656         msg = NULL;
1657         if (ret == 0) {
1658                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1659                            (unsigned long) res->num);
1660                 wpa_driver_nl80211_check_bss_status(drv, res);
1661                 return res;
1662         }
1663         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1664                    "(%s)", ret, strerror(-ret));
1665 nla_put_failure:
1666         nlmsg_free(msg);
1667         wpa_scan_results_free(res);
1668         return NULL;
1669 }
1670
1671
1672 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1673                                       enum wpa_alg alg, const u8 *addr,
1674                                       int key_idx, int set_tx,
1675                                       const u8 *seq, size_t seq_len,
1676                                       const u8 *key, size_t key_len)
1677 {
1678         struct wpa_driver_nl80211_data *drv = priv;
1679         int ifindex = if_nametoindex(ifname);
1680         struct nl_msg *msg;
1681         int ret;
1682
1683         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1684                    "set_tx=%d seq_len=%lu key_len=%lu",
1685                    __func__, ifindex, alg, addr, key_idx, set_tx,
1686                    (unsigned long) seq_len, (unsigned long) key_len);
1687
1688         msg = nlmsg_alloc();
1689         if (!msg)
1690                 return -ENOMEM;
1691
1692         if (alg == WPA_ALG_NONE) {
1693                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1694                             0, NL80211_CMD_DEL_KEY, 0);
1695         } else {
1696                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1697                             0, NL80211_CMD_NEW_KEY, 0);
1698                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1699                 switch (alg) {
1700                 case WPA_ALG_WEP:
1701                         if (key_len == 5)
1702                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1703                                             WLAN_CIPHER_SUITE_WEP40);
1704                         else
1705                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1706                                             WLAN_CIPHER_SUITE_WEP104);
1707                         break;
1708                 case WPA_ALG_TKIP:
1709                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1710                                     WLAN_CIPHER_SUITE_TKIP);
1711                         break;
1712                 case WPA_ALG_CCMP:
1713                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1714                                     WLAN_CIPHER_SUITE_CCMP);
1715                         break;
1716                 case WPA_ALG_IGTK:
1717                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1718                                     WLAN_CIPHER_SUITE_AES_CMAC);
1719                         break;
1720                 default:
1721                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1722                                    "algorithm %d", __func__, alg);
1723                         nlmsg_free(msg);
1724                         return -1;
1725                 }
1726         }
1727
1728         if (seq && seq_len)
1729                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1730
1731         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1732         {
1733                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1734                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1735         }
1736         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1737         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1738
1739         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1740         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1741                 ret = 0;
1742         if (ret)
1743                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1744                            ret, strerror(-ret));
1745
1746         /*
1747          * If we failed or don't need to set the default TX key (below),
1748          * we're done here.
1749          */
1750         if (ret || !set_tx || alg == WPA_ALG_NONE)
1751                 return ret;
1752 #ifdef HOSTAPD /* FIX: is this needed? */
1753         if (addr)
1754                 return ret;
1755 #endif /* HOSTAPD */
1756
1757         msg = nlmsg_alloc();
1758         if (!msg)
1759                 return -ENOMEM;
1760
1761         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1762                     0, NL80211_CMD_SET_KEY, 0);
1763         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1764         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1765         if (alg == WPA_ALG_IGTK)
1766                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1767         else
1768                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1769
1770         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1771         if (ret == -ENOENT)
1772                 ret = 0;
1773         if (ret)
1774                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1775                            "err=%d %s)", ret, strerror(-ret));
1776         return ret;
1777
1778 nla_put_failure:
1779         return -ENOBUFS;
1780 }
1781
1782
1783 static int nl_add_key(struct nl_msg *msg, enum wpa_alg alg,
1784                       int key_idx, int defkey,
1785                       const u8 *seq, size_t seq_len,
1786                       const u8 *key, size_t key_len)
1787 {
1788         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1789         if (!key_attr)
1790                 return -1;
1791
1792         if (defkey && alg == WPA_ALG_IGTK)
1793                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1794         else if (defkey)
1795                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1796
1797         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1798
1799         switch (alg) {
1800         case WPA_ALG_WEP:
1801                 if (key_len == 5)
1802                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1803                                     WLAN_CIPHER_SUITE_WEP40);
1804                 else
1805                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1806                                     WLAN_CIPHER_SUITE_WEP104);
1807                 break;
1808         case WPA_ALG_TKIP:
1809                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1810                 break;
1811         case WPA_ALG_CCMP:
1812                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1813                 break;
1814         case WPA_ALG_IGTK:
1815                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1816                             WLAN_CIPHER_SUITE_AES_CMAC);
1817                 break;
1818         default:
1819                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1820                            "algorithm %d", __func__, alg);
1821                 return -1;
1822         }
1823
1824         if (seq && seq_len)
1825                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1826
1827         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1828
1829         nla_nest_end(msg, key_attr);
1830
1831         return 0;
1832  nla_put_failure:
1833         return -1;
1834 }
1835
1836
1837 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1838                                  struct nl_msg *msg)
1839 {
1840         int i, privacy = 0;
1841         struct nlattr *nl_keys, *nl_key;
1842
1843         for (i = 0; i < 4; i++) {
1844                 if (!params->wep_key[i])
1845                         continue;
1846                 privacy = 1;
1847                 break;
1848         }
1849         if (!privacy)
1850                 return 0;
1851
1852         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1853
1854         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1855         if (!nl_keys)
1856                 goto nla_put_failure;
1857
1858         for (i = 0; i < 4; i++) {
1859                 if (!params->wep_key[i])
1860                         continue;
1861
1862                 nl_key = nla_nest_start(msg, i);
1863                 if (!nl_key)
1864                         goto nla_put_failure;
1865
1866                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1867                         params->wep_key[i]);
1868                 if (params->wep_key_len[i] == 5)
1869                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1870                                     WLAN_CIPHER_SUITE_WEP40);
1871                 else
1872                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1873                                     WLAN_CIPHER_SUITE_WEP104);
1874
1875                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1876
1877                 if (i == params->wep_tx_keyidx)
1878                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1879
1880                 nla_nest_end(msg, nl_key);
1881         }
1882         nla_nest_end(msg, nl_keys);
1883
1884         return 0;
1885
1886 nla_put_failure:
1887         return -ENOBUFS;
1888 }
1889
1890
1891 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1892                                    const u8 *addr, int cmd, u16 reason_code)
1893 {
1894         int ret = -1;
1895         struct nl_msg *msg;
1896
1897         msg = nlmsg_alloc();
1898         if (!msg)
1899                 return -1;
1900
1901         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1902
1903         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1904         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1905         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1906
1907         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1908         msg = NULL;
1909         if (ret) {
1910                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1911                            "(%s)", ret, strerror(-ret));
1912                 goto nla_put_failure;
1913         }
1914         ret = 0;
1915
1916 nla_put_failure:
1917         nlmsg_free(msg);
1918         return ret;
1919 }
1920
1921
1922 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
1923                                          const u8 *addr, int reason_code)
1924 {
1925         wpa_printf(MSG_DEBUG, "%s", __func__);
1926         drv->associated = 0;
1927         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
1928                                        reason_code);
1929 }
1930
1931
1932 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1933                                              int reason_code)
1934 {
1935         struct wpa_driver_nl80211_data *drv = priv;
1936         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1937                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1938         wpa_printf(MSG_DEBUG, "%s", __func__);
1939         drv->associated = 0;
1940         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1941                                        reason_code);
1942 }
1943
1944
1945 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1946                                            int reason_code)
1947 {
1948         struct wpa_driver_nl80211_data *drv = priv;
1949         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
1950                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
1951         wpa_printf(MSG_DEBUG, "%s", __func__);
1952         drv->associated = 0;
1953         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1954                                        reason_code);
1955 }
1956
1957
1958 static int wpa_driver_nl80211_authenticate(
1959         void *priv, struct wpa_driver_auth_params *params)
1960 {
1961         struct wpa_driver_nl80211_data *drv = priv;
1962         int ret = -1, i;
1963         struct nl_msg *msg;
1964         enum nl80211_auth_type type;
1965         int count = 0;
1966
1967         drv->associated = 0;
1968         os_memset(drv->auth_bssid, 0, ETH_ALEN);
1969
1970         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
1971                 return -1;
1972
1973 retry:
1974         msg = nlmsg_alloc();
1975         if (!msg)
1976                 return -1;
1977
1978         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1979                    drv->ifindex);
1980
1981         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1982                     NL80211_CMD_AUTHENTICATE, 0);
1983
1984         for (i = 0; i < 4; i++) {
1985                 if (!params->wep_key[i])
1986                         continue;
1987                 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
1988                                            i,
1989                                            i == params->wep_tx_keyidx, NULL, 0,
1990                                            params->wep_key[i],
1991                                            params->wep_key_len[i]);
1992                 if (params->wep_tx_keyidx != i)
1993                         continue;
1994                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
1995                                params->wep_key[i], params->wep_key_len[i])) {
1996                         nlmsg_free(msg);
1997                         return -1;
1998                 }
1999         }
2000
2001         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2002         if (params->bssid) {
2003                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2004                            MAC2STR(params->bssid));
2005                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2006         }
2007         if (params->freq) {
2008                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2009                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2010         }
2011         if (params->ssid) {
2012                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2013                                   params->ssid, params->ssid_len);
2014                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2015                         params->ssid);
2016         }
2017         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2018         if (params->ie)
2019                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2020         /*
2021          * TODO: if multiple auth_alg options enabled, try them one by one if
2022          * the AP rejects authentication due to unknown auth alg
2023          */
2024         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2025                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2026         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2027                 type = NL80211_AUTHTYPE_SHARED_KEY;
2028         else if (params->auth_alg & AUTH_ALG_LEAP)
2029                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2030         else if (params->auth_alg & AUTH_ALG_FT)
2031                 type = NL80211_AUTHTYPE_FT;
2032         else
2033                 goto nla_put_failure;
2034         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2035         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2036
2037         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2038         msg = NULL;
2039         if (ret) {
2040                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2041                            "(%s)", ret, strerror(-ret));
2042                 count++;
2043                 if (ret == -EALREADY && count == 1 && params->bssid) {
2044                         /*
2045                          * mac80211 does not currently accept new
2046                          * authentication if we are already authenticated. As a
2047                          * workaround, force deauthentication and try again.
2048                          */
2049                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2050                                    "after forced deauthentication");
2051                         wpa_driver_nl80211_deauthenticate(
2052                                 drv, params->bssid,
2053                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2054                         nlmsg_free(msg);
2055                         goto retry;
2056                 }
2057                 goto nla_put_failure;
2058         }
2059         ret = 0;
2060         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2061                    "successfully");
2062
2063 nla_put_failure:
2064         nlmsg_free(msg);
2065         return ret;
2066 }
2067
2068
2069 struct phy_info_arg {
2070         u16 *num_modes;
2071         struct hostapd_hw_modes *modes;
2072 };
2073
2074 static int phy_info_handler(struct nl_msg *msg, void *arg)
2075 {
2076         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2077         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2078         struct phy_info_arg *phy_info = arg;
2079
2080         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2081
2082         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2083         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2084                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2085                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2086                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2087                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2088                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2089                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2090         };
2091
2092         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2093         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2094                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2095                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2096         };
2097
2098         struct nlattr *nl_band;
2099         struct nlattr *nl_freq;
2100         struct nlattr *nl_rate;
2101         int rem_band, rem_freq, rem_rate;
2102         struct hostapd_hw_modes *mode;
2103         int idx, mode_is_set;
2104
2105         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2106                   genlmsg_attrlen(gnlh, 0), NULL);
2107
2108         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2109                 return NL_SKIP;
2110
2111         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2112                 mode = os_realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2113                 if (!mode)
2114                         return NL_SKIP;
2115                 phy_info->modes = mode;
2116
2117                 mode_is_set = 0;
2118
2119                 mode = &phy_info->modes[*(phy_info->num_modes)];
2120                 memset(mode, 0, sizeof(*mode));
2121                 *(phy_info->num_modes) += 1;
2122
2123                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2124                           nla_len(nl_band), NULL);
2125
2126                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2127                         mode->ht_capab = nla_get_u16(
2128                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2129                 }
2130
2131                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2132                         mode->a_mpdu_params |= nla_get_u8(
2133                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2134                                 0x03;
2135                 }
2136
2137                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2138                         mode->a_mpdu_params |= nla_get_u8(
2139                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2140                                 2;
2141                 }
2142
2143                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2144                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2145                         u8 *mcs;
2146                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2147                         os_memcpy(mode->mcs_set, mcs, 16);
2148                 }
2149
2150                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2151                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2152                                   nla_len(nl_freq), freq_policy);
2153                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2154                                 continue;
2155                         mode->num_channels++;
2156                 }
2157
2158                 mode->channels = os_zalloc(mode->num_channels * sizeof(struct hostapd_channel_data));
2159                 if (!mode->channels)
2160                         return NL_SKIP;
2161
2162                 idx = 0;
2163
2164                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2165                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2166                                   nla_len(nl_freq), freq_policy);
2167                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2168                                 continue;
2169
2170                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2171                         mode->channels[idx].flag = 0;
2172
2173                         if (!mode_is_set) {
2174                                 /* crude heuristic */
2175                                 if (mode->channels[idx].freq < 4000)
2176                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2177                                 else
2178                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2179                                 mode_is_set = 1;
2180                         }
2181
2182                         /* crude heuristic */
2183                         if (mode->channels[idx].freq < 4000)
2184                                 if (mode->channels[idx].freq == 2484)
2185                                         mode->channels[idx].chan = 14;
2186                                 else
2187                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2188                         else
2189                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2190
2191                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2192                                 mode->channels[idx].flag |=
2193                                         HOSTAPD_CHAN_DISABLED;
2194                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2195                                 mode->channels[idx].flag |=
2196                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2197                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2198                                 mode->channels[idx].flag |=
2199                                         HOSTAPD_CHAN_NO_IBSS;
2200                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2201                                 mode->channels[idx].flag |=
2202                                         HOSTAPD_CHAN_RADAR;
2203
2204                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2205                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2206                                 mode->channels[idx].max_tx_power =
2207                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2208
2209                         idx++;
2210                 }
2211
2212                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2213                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2214                                   nla_len(nl_rate), rate_policy);
2215                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2216                                 continue;
2217                         mode->num_rates++;
2218                 }
2219
2220                 mode->rates = os_zalloc(mode->num_rates * sizeof(int));
2221                 if (!mode->rates)
2222                         return NL_SKIP;
2223
2224                 idx = 0;
2225
2226                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2227                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2228                                   nla_len(nl_rate), rate_policy);
2229                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2230                                 continue;
2231                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2232
2233                         /* crude heuristic */
2234                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2235                             mode->rates[idx] > 200)
2236                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2237
2238                         idx++;
2239                 }
2240         }
2241
2242         return NL_SKIP;
2243 }
2244
2245 static struct hostapd_hw_modes *
2246 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2247 {
2248         u16 m;
2249         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2250         int i, mode11g_idx = -1;
2251
2252         /* If only 802.11g mode is included, use it to construct matching
2253          * 802.11b mode data. */
2254
2255         for (m = 0; m < *num_modes; m++) {
2256                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2257                         return modes; /* 802.11b already included */
2258                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2259                         mode11g_idx = m;
2260         }
2261
2262         if (mode11g_idx < 0)
2263                 return modes; /* 2.4 GHz band not supported at all */
2264
2265         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2266         if (nmodes == NULL)
2267                 return modes; /* Could not add 802.11b mode */
2268
2269         mode = &nmodes[*num_modes];
2270         os_memset(mode, 0, sizeof(*mode));
2271         (*num_modes)++;
2272         modes = nmodes;
2273
2274         mode->mode = HOSTAPD_MODE_IEEE80211B;
2275
2276         mode11g = &modes[mode11g_idx];
2277         mode->num_channels = mode11g->num_channels;
2278         mode->channels = os_malloc(mode11g->num_channels *
2279                                    sizeof(struct hostapd_channel_data));
2280         if (mode->channels == NULL) {
2281                 (*num_modes)--;
2282                 return modes; /* Could not add 802.11b mode */
2283         }
2284         os_memcpy(mode->channels, mode11g->channels,
2285                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2286
2287         mode->num_rates = 0;
2288         mode->rates = os_malloc(4 * sizeof(int));
2289         if (mode->rates == NULL) {
2290                 os_free(mode->channels);
2291                 (*num_modes)--;
2292                 return modes; /* Could not add 802.11b mode */
2293         }
2294
2295         for (i = 0; i < mode11g->num_rates; i++) {
2296                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2297                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2298                         continue;
2299                 mode->rates[mode->num_rates] = mode11g->rates[i];
2300                 mode->num_rates++;
2301                 if (mode->num_rates == 4)
2302                         break;
2303         }
2304
2305         if (mode->num_rates == 0) {
2306                 os_free(mode->channels);
2307                 os_free(mode->rates);
2308                 (*num_modes)--;
2309                 return modes; /* No 802.11b rates */
2310         }
2311
2312         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2313                    "information");
2314
2315         return modes;
2316 }
2317
2318
2319 static struct hostapd_hw_modes *
2320 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2321 {
2322         struct wpa_driver_nl80211_data *drv = priv;
2323         struct nl_msg *msg;
2324         struct phy_info_arg result = {
2325                 .num_modes = num_modes,
2326                 .modes = NULL,
2327         };
2328
2329         *num_modes = 0;
2330         *flags = 0;
2331
2332         msg = nlmsg_alloc();
2333         if (!msg)
2334                 return NULL;
2335
2336         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2337                     0, NL80211_CMD_GET_WIPHY, 0);
2338
2339         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2340
2341         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2342                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2343  nla_put_failure:
2344         return NULL;
2345 }
2346
2347
2348 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2349                                          const void *data, size_t len,
2350                                          int encrypt)
2351 {
2352         __u8 rtap_hdr[] = {
2353                 0x00, 0x00, /* radiotap version */
2354                 0x0e, 0x00, /* radiotap length */
2355                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2356                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2357                 0x00,       /* padding */
2358                 0x00, 0x00, /* RX and TX flags to indicate that */
2359                 0x00, 0x00, /* this is the injected frame directly */
2360         };
2361         struct iovec iov[2] = {
2362                 {
2363                         .iov_base = &rtap_hdr,
2364                         .iov_len = sizeof(rtap_hdr),
2365                 },
2366                 {
2367                         .iov_base = (void *) data,
2368                         .iov_len = len,
2369                 }
2370         };
2371         struct msghdr msg = {
2372                 .msg_name = NULL,
2373                 .msg_namelen = 0,
2374                 .msg_iov = iov,
2375                 .msg_iovlen = 2,
2376                 .msg_control = NULL,
2377                 .msg_controllen = 0,
2378                 .msg_flags = 0,
2379         };
2380
2381         if (encrypt)
2382                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2383
2384         return sendmsg(drv->monitor_sock, &msg, 0);
2385 }
2386
2387
2388 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2389                                         size_t data_len)
2390 {
2391         struct wpa_driver_nl80211_data *drv = priv;
2392         struct ieee80211_mgmt *mgmt;
2393         int encrypt = 1;
2394         u16 fc;
2395
2396         mgmt = (struct ieee80211_mgmt *) data;
2397         fc = le_to_host16(mgmt->frame_control);
2398
2399         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2400             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2401                 /*
2402                  * Only one of the authentication frame types is encrypted.
2403                  * In order for static WEP encryption to work properly (i.e.,
2404                  * to not encrypt the frame), we need to tell mac80211 about
2405                  * the frames that must not be encrypted.
2406                  */
2407                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2408                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2409                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2410                         encrypt = 0;
2411         }
2412
2413         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2414 }
2415
2416
2417 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2418                                          const u8 *head, size_t head_len,
2419                                          const u8 *tail, size_t tail_len,
2420                                          int dtim_period, int beacon_int)
2421 {
2422         struct wpa_driver_nl80211_data *drv = priv;
2423         struct nl_msg *msg;
2424         u8 cmd = NL80211_CMD_NEW_BEACON;
2425         int ret;
2426         int beacon_set;
2427         int ifindex = if_nametoindex(ifname);
2428 #ifdef HOSTAPD
2429         struct i802_bss *bss;
2430
2431         bss = get_bss(drv, ifindex);
2432         if (bss == NULL)
2433                 return -ENOENT;
2434         beacon_set = bss->beacon_set;
2435 #else /* HOSTAPD */
2436         beacon_set = drv->beacon_set;
2437 #endif /* HOSTAPD */
2438
2439         msg = nlmsg_alloc();
2440         if (!msg)
2441                 return -ENOMEM;
2442
2443         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2444                    beacon_set);
2445         if (beacon_set)
2446                 cmd = NL80211_CMD_SET_BEACON;
2447
2448         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2449                     0, cmd, 0);
2450         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2451         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2452         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2453         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2454         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2455
2456         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2457         if (ret) {
2458                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2459                            ret, strerror(-ret));
2460         } else {
2461 #ifdef HOSTAPD
2462                 bss->beacon_set = 1;
2463 #else /* HOSTAPD */
2464                 drv->beacon_set = 1;
2465 #endif /* HOSTAPD */
2466         }
2467         return ret;
2468  nla_put_failure:
2469         return -ENOBUFS;
2470 }
2471
2472
2473 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2474                                        int freq, int ht_enabled,
2475                                        int sec_channel_offset)
2476 {
2477         struct nl_msg *msg;
2478         int ret;
2479
2480         msg = nlmsg_alloc();
2481         if (!msg)
2482                 return -1;
2483
2484         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2485                     NL80211_CMD_SET_WIPHY, 0);
2486
2487         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2488         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2489         if (ht_enabled) {
2490                 switch (sec_channel_offset) {
2491                 case -1:
2492                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2493                                     NL80211_CHAN_HT40MINUS);
2494                         break;
2495                 case 1:
2496                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2497                                     NL80211_CHAN_HT40PLUS);
2498                         break;
2499                 default:
2500                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2501                                     NL80211_CHAN_HT20);
2502                         break;
2503                 }
2504         }
2505
2506         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2507         if (ret == 0)
2508                 return 0;
2509         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2510                    "%d (%s)", freq, ret, strerror(-ret));
2511 nla_put_failure:
2512         return -1;
2513 }
2514
2515
2516 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2517                                       struct hostapd_sta_add_params *params)
2518 {
2519         struct wpa_driver_nl80211_data *drv = priv;
2520         struct nl_msg *msg;
2521         int ret = -ENOBUFS;
2522
2523         msg = nlmsg_alloc();
2524         if (!msg)
2525                 return -ENOMEM;
2526
2527         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2528                     0, NL80211_CMD_NEW_STATION, 0);
2529
2530         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2531         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2532         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2533         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2534                 params->supp_rates);
2535         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2536                     params->listen_interval);
2537         if (params->ht_capabilities) {
2538                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2539                         sizeof(*params->ht_capabilities),
2540                         params->ht_capabilities);
2541         }
2542
2543         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2544         if (ret)
2545                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2546                            "result: %d (%s)", ret, strerror(-ret));
2547         if (ret == -EEXIST)
2548                 ret = 0;
2549  nla_put_failure:
2550         return ret;
2551 }
2552
2553
2554 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2555 {
2556         struct wpa_driver_nl80211_data *drv = priv;
2557         struct nl_msg *msg;
2558         int ret;
2559
2560         msg = nlmsg_alloc();
2561         if (!msg)
2562                 return -ENOMEM;
2563
2564         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2565                     0, NL80211_CMD_DEL_STATION, 0);
2566
2567         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2568                     if_nametoindex(drv->ifname));
2569         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2570
2571         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2572         if (ret == -ENOENT)
2573                 return 0;
2574         return ret;
2575  nla_put_failure:
2576         return -ENOBUFS;
2577 }
2578
2579
2580 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2581                                  int ifidx)
2582 {
2583         struct nl_msg *msg;
2584
2585         wpa_printf(MSG_DEBUG, "nl80211: Remove interface ifindex=%d", ifidx);
2586
2587 #ifdef HOSTAPD
2588         /* stop listening for EAPOL on this interface */
2589         del_ifidx(drv, ifidx);
2590 #endif /* HOSTAPD */
2591
2592         msg = nlmsg_alloc();
2593         if (!msg)
2594                 goto nla_put_failure;
2595
2596         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2597                     0, NL80211_CMD_DEL_INTERFACE, 0);
2598         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2599
2600         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2601                 return;
2602  nla_put_failure:
2603         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2604                    ifidx);
2605 }
2606
2607
2608 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2609                                      const char *ifname,
2610                                      enum nl80211_iftype iftype,
2611                                      const u8 *addr, int wds)
2612 {
2613         struct nl_msg *msg, *flags = NULL;
2614         int ifidx;
2615         int ret = -ENOBUFS;
2616
2617         msg = nlmsg_alloc();
2618         if (!msg)
2619                 return -1;
2620
2621         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2622                     0, NL80211_CMD_NEW_INTERFACE, 0);
2623         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2624         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2625         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2626
2627         if (iftype == NL80211_IFTYPE_MONITOR) {
2628                 int err;
2629
2630                 flags = nlmsg_alloc();
2631                 if (!flags)
2632                         goto nla_put_failure;
2633
2634                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2635
2636                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2637
2638                 nlmsg_free(flags);
2639
2640                 if (err)
2641                         goto nla_put_failure;
2642         } else if (wds) {
2643                 NLA_PUT_U8(msg, NL80211_ATTR_4ADDR, wds);
2644         }
2645
2646         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2647         if (ret) {
2648  nla_put_failure:
2649                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2650                            ifname, ret, strerror(-ret));
2651                 return ret;
2652         }
2653
2654         ifidx = if_nametoindex(ifname);
2655         wpa_printf(MSG_DEBUG, "nl80211: New interface %s created: ifindex=%d",
2656                    ifname, ifidx);
2657
2658         if (ifidx <= 0)
2659                 return -1;
2660
2661 #ifdef HOSTAPD
2662         /* start listening for EAPOL on this interface */
2663         add_ifidx(drv, ifidx);
2664
2665         if (addr && iftype == NL80211_IFTYPE_AP &&
2666             set_ifhwaddr(drv, ifname, addr)) {
2667                 nl80211_remove_iface(drv, ifidx);
2668                 return -1;
2669         }
2670 #endif /* HOSTAPD */
2671
2672         return ifidx;
2673 }
2674
2675
2676 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2677                                 const char *ifname, enum nl80211_iftype iftype,
2678                                 const u8 *addr, int wds)
2679 {
2680         int ret;
2681
2682         ret = nl80211_create_iface_once(drv, ifname, iftype, addr, wds);
2683
2684         /* if error occured and interface exists already */
2685         if (ret == -ENFILE && if_nametoindex(ifname)) {
2686                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2687
2688                 /* Try to remove the interface that was already there. */
2689                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2690
2691                 /* Try to create the interface again */
2692                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr,
2693                                                 wds);
2694         }
2695
2696         return ret;
2697 }
2698
2699
2700 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2701 {
2702         struct ieee80211_hdr *hdr;
2703         u16 fc;
2704         union wpa_event_data event;
2705
2706         hdr = (struct ieee80211_hdr *) buf;
2707         fc = le_to_host16(hdr->frame_control);
2708
2709         os_memset(&event, 0, sizeof(event));
2710         event.tx_status.type = WLAN_FC_GET_TYPE(fc);
2711         event.tx_status.stype = WLAN_FC_GET_STYPE(fc);
2712         event.tx_status.dst = hdr->addr1;
2713         event.tx_status.data = buf;
2714         event.tx_status.data_len = len;
2715         event.tx_status.ack = ok;
2716         wpa_supplicant_event(ctx, EVENT_TX_STATUS, &event);
2717 }
2718
2719
2720 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2721                              u8 *buf, size_t len)
2722 {
2723         union wpa_event_data event;
2724         os_memset(&event, 0, sizeof(event));
2725         event.rx_from_unknown.frame = buf;
2726         event.rx_from_unknown.len = len;
2727         wpa_supplicant_event(drv->ctx, EVENT_RX_FROM_UNKNOWN, &event);
2728 }
2729
2730
2731 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2732                          u8 *buf, size_t len, int datarate, int ssi_signal)
2733 {
2734         struct ieee80211_hdr *hdr;
2735         u16 fc;
2736         union wpa_event_data event;
2737
2738         hdr = (struct ieee80211_hdr *) buf;
2739         fc = le_to_host16(hdr->frame_control);
2740
2741         switch (WLAN_FC_GET_TYPE(fc)) {
2742         case WLAN_FC_TYPE_MGMT:
2743                 os_memset(&event, 0, sizeof(event));
2744                 event.rx_mgmt.frame = buf;
2745                 event.rx_mgmt.frame_len = len;
2746                 event.rx_mgmt.datarate = datarate;
2747                 event.rx_mgmt.ssi_signal = ssi_signal;
2748                 wpa_supplicant_event(drv->ctx, EVENT_RX_MGMT, &event);
2749                 break;
2750         case WLAN_FC_TYPE_CTRL:
2751                 /* can only get here with PS-Poll frames */
2752                 wpa_printf(MSG_DEBUG, "CTRL");
2753                 from_unknown_sta(drv, buf, len);
2754                 break;
2755         case WLAN_FC_TYPE_DATA:
2756                 from_unknown_sta(drv, buf, len);
2757                 break;
2758         }
2759 }
2760
2761
2762 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2763 {
2764         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2765         int len;
2766         unsigned char buf[3000];
2767         struct ieee80211_radiotap_iterator iter;
2768         int ret;
2769         int datarate = 0, ssi_signal = 0;
2770         int injected = 0, failed = 0, rxflags = 0;
2771
2772         len = recv(sock, buf, sizeof(buf), 0);
2773         if (len < 0) {
2774                 perror("recv");
2775                 return;
2776         }
2777
2778         if (drv->nlmode == NL80211_IFTYPE_STATION && !drv->probe_req_report) {
2779                 wpa_printf(MSG_DEBUG, "nl80211: Ignore monitor interface "
2780                            "frame since Probe Request reporting is disabled");
2781                 return;
2782         }
2783
2784         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2785                 printf("received invalid radiotap frame\n");
2786                 return;
2787         }
2788
2789         while (1) {
2790                 ret = ieee80211_radiotap_iterator_next(&iter);
2791                 if (ret == -ENOENT)
2792                         break;
2793                 if (ret) {
2794                         printf("received invalid radiotap frame (%d)\n", ret);
2795                         return;
2796                 }
2797                 switch (iter.this_arg_index) {
2798                 case IEEE80211_RADIOTAP_FLAGS:
2799                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2800                                 len -= 4;
2801                         break;
2802                 case IEEE80211_RADIOTAP_RX_FLAGS:
2803                         rxflags = 1;
2804                         break;
2805                 case IEEE80211_RADIOTAP_TX_FLAGS:
2806                         injected = 1;
2807                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2808                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2809                         break;
2810                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2811                         break;
2812                 case IEEE80211_RADIOTAP_CHANNEL:
2813                         /* TODO: convert from freq/flags to channel number */
2814                         break;
2815                 case IEEE80211_RADIOTAP_RATE:
2816                         datarate = *iter.this_arg * 5;
2817                         break;
2818                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2819                         ssi_signal = *iter.this_arg;
2820                         break;
2821                 }
2822         }
2823
2824         if (rxflags && injected)
2825                 return;
2826
2827         if (!injected)
2828                 handle_frame(drv, buf + iter.max_length,
2829                              len - iter.max_length, datarate, ssi_signal);
2830         else
2831                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2832                                    len - iter.max_length, !failed);
2833 }
2834
2835
2836 /*
2837  * we post-process the filter code later and rewrite
2838  * this to the offset to the last instruction
2839  */
2840 #define PASS    0xFF
2841 #define FAIL    0xFE
2842
2843 static struct sock_filter msock_filter_insns[] = {
2844         /*
2845          * do a little-endian load of the radiotap length field
2846          */
2847         /* load lower byte into A */
2848         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2849         /* put it into X (== index register) */
2850         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2851         /* load upper byte into A */
2852         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2853         /* left-shift it by 8 */
2854         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2855         /* or with X */
2856         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2857         /* put result into X */
2858         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2859
2860         /*
2861          * Allow management frames through, this also gives us those
2862          * management frames that we sent ourselves with status
2863          */
2864         /* load the lower byte of the IEEE 802.11 frame control field */
2865         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2866         /* mask off frame type and version */
2867         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2868         /* accept frame if it's both 0, fall through otherwise */
2869         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2870
2871         /*
2872          * TODO: add a bit to radiotap RX flags that indicates
2873          * that the sending station is not associated, then
2874          * add a filter here that filters on our DA and that flag
2875          * to allow us to deauth frames to that bad station.
2876          *
2877          * Not a regression -- we didn't do it before either.
2878          */
2879
2880 #if 0
2881         /*
2882          * drop non-data frames
2883          */
2884         /* load the lower byte of the frame control field */
2885         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2886         /* mask off QoS bit */
2887         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2888         /* drop non-data frames */
2889         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2890 #endif
2891         /* load the upper byte of the frame control field */
2892         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 1),
2893         /* mask off toDS/fromDS */
2894         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2895         /* accept WDS frames */
2896         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, PASS, 0),
2897
2898         /*
2899          * add header length to index
2900          */
2901         /* load the lower byte of the frame control field */
2902         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2903         /* mask off QoS bit */
2904         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2905         /* right shift it by 6 to give 0 or 2 */
2906         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2907         /* add data frame header length */
2908         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2909         /* add index, was start of 802.11 header */
2910         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2911         /* move to index, now start of LL header */
2912         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2913
2914         /*
2915          * Accept empty data frames, we use those for
2916          * polling activity.
2917          */
2918         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2919         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2920
2921         /*
2922          * Accept EAPOL frames
2923          */
2924         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2925         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2926         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2927         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2928
2929         /* keep these last two statements or change the code below */
2930         /* return 0 == "DROP" */
2931         BPF_STMT(BPF_RET | BPF_K, 0),
2932         /* return ~0 == "keep all" */
2933         BPF_STMT(BPF_RET | BPF_K, ~0),
2934 };
2935
2936 static struct sock_fprog msock_filter = {
2937         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2938         .filter = msock_filter_insns,
2939 };
2940
2941
2942 static int add_monitor_filter(int s)
2943 {
2944         int idx;
2945
2946         /* rewrite all PASS/FAIL jump offsets */
2947         for (idx = 0; idx < msock_filter.len; idx++) {
2948                 struct sock_filter *insn = &msock_filter_insns[idx];
2949
2950                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2951                         if (insn->code == (BPF_JMP|BPF_JA)) {
2952                                 if (insn->k == PASS)
2953                                         insn->k = msock_filter.len - idx - 2;
2954                                 else if (insn->k == FAIL)
2955                                         insn->k = msock_filter.len - idx - 3;
2956                         }
2957
2958                         if (insn->jt == PASS)
2959                                 insn->jt = msock_filter.len - idx - 2;
2960                         else if (insn->jt == FAIL)
2961                                 insn->jt = msock_filter.len - idx - 3;
2962
2963                         if (insn->jf == PASS)
2964                                 insn->jf = msock_filter.len - idx - 2;
2965                         else if (insn->jf == FAIL)
2966                                 insn->jf = msock_filter.len - idx - 3;
2967                 }
2968         }
2969
2970         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2971                        &msock_filter, sizeof(msock_filter))) {
2972                 perror("SO_ATTACH_FILTER");
2973                 return -1;
2974         }
2975
2976         return 0;
2977 }
2978
2979
2980 static void nl80211_remove_monitor_interface(
2981         struct wpa_driver_nl80211_data *drv)
2982 {
2983         if (drv->monitor_ifidx >= 0) {
2984                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2985                 drv->monitor_ifidx = -1;
2986         }
2987         if (drv->monitor_sock >= 0) {
2988                 eloop_unregister_read_sock(drv->monitor_sock);
2989                 close(drv->monitor_sock);
2990                 drv->monitor_sock = -1;
2991         }
2992 }
2993
2994
2995 static int
2996 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2997 {
2998         char buf[IFNAMSIZ];
2999         struct sockaddr_ll ll;
3000         int optval;
3001         socklen_t optlen;
3002
3003         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3004         buf[IFNAMSIZ - 1] = '\0';
3005
3006         drv->monitor_ifidx =
3007                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL,
3008                                      0);
3009
3010         if (drv->monitor_ifidx < 0)
3011                 return -1;
3012
3013         if (hostapd_set_iface_flags(drv, buf, 1))
3014                 goto error;
3015
3016         memset(&ll, 0, sizeof(ll));
3017         ll.sll_family = AF_PACKET;
3018         ll.sll_ifindex = drv->monitor_ifidx;
3019         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3020         if (drv->monitor_sock < 0) {
3021                 perror("socket[PF_PACKET,SOCK_RAW]");
3022                 goto error;
3023         }
3024
3025         if (add_monitor_filter(drv->monitor_sock)) {
3026                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3027                            "interface; do filtering in user space");
3028                 /* This works, but will cost in performance. */
3029         }
3030
3031         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3032                 perror("monitor socket bind");
3033                 goto error;
3034         }
3035
3036         optlen = sizeof(optval);
3037         optval = 20;
3038         if (setsockopt
3039             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3040                 perror("Failed to set socket priority");
3041                 goto error;
3042         }
3043
3044         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3045                                      drv, NULL)) {
3046                 printf("Could not register monitor read socket\n");
3047                 goto error;
3048         }
3049
3050         return 0;
3051  error:
3052         nl80211_remove_monitor_interface(drv);
3053         return -1;
3054 }
3055
3056
3057 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3058
3059 static int wpa_driver_nl80211_hapd_send_eapol(
3060         void *priv, const u8 *addr, const u8 *data,
3061         size_t data_len, int encrypt, const u8 *own_addr)
3062 {
3063         struct wpa_driver_nl80211_data *drv = priv;
3064         struct ieee80211_hdr *hdr;
3065         size_t len;
3066         u8 *pos;
3067         int res;
3068 #if 0 /* FIX */
3069         int qos = sta->flags & WPA_STA_WMM;
3070 #else
3071         int qos = 0;
3072 #endif
3073
3074         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3075                 data_len;
3076         hdr = os_zalloc(len);
3077         if (hdr == NULL) {
3078                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3079                        (unsigned long) len);
3080                 return -1;
3081         }
3082
3083         hdr->frame_control =
3084                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3085         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3086         if (encrypt)
3087                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3088 #if 0 /* To be enabled if qos determination is added above */
3089         if (qos) {
3090                 hdr->frame_control |=
3091                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3092         }
3093 #endif
3094
3095         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3096         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3097         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3098         pos = (u8 *) (hdr + 1);
3099
3100 #if 0 /* To be enabled if qos determination is added above */
3101         if (qos) {
3102                 /* add an empty QoS header if needed */
3103                 pos[0] = 0;
3104                 pos[1] = 0;
3105                 pos += 2;
3106         }
3107 #endif
3108
3109         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3110         pos += sizeof(rfc1042_header);
3111         WPA_PUT_BE16(pos, ETH_P_PAE);
3112         pos += 2;
3113         memcpy(pos, data, data_len);
3114
3115         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3116         if (res < 0) {
3117                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3118                            "failed: %d (%s)",
3119                            (unsigned long) len, errno, strerror(errno));
3120         }
3121         os_free(hdr);
3122
3123         return res;
3124 }
3125
3126
3127 static u32 sta_flags_nl80211(int flags)
3128 {
3129         u32 f = 0;
3130
3131         if (flags & WPA_STA_AUTHORIZED)
3132                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3133         if (flags & WPA_STA_WMM)
3134                 f |= BIT(NL80211_STA_FLAG_WME);
3135         if (flags & WPA_STA_SHORT_PREAMBLE)
3136                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3137         if (flags & WPA_STA_MFP)
3138                 f |= BIT(NL80211_STA_FLAG_MFP);
3139
3140         return f;
3141 }
3142
3143
3144 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3145                                             int total_flags, int flags_or,
3146                                             int flags_and)
3147 {
3148         struct wpa_driver_nl80211_data *drv = priv;
3149         struct nl_msg *msg, *flags = NULL;
3150         struct nl80211_sta_flag_update upd;
3151
3152         msg = nlmsg_alloc();
3153         if (!msg)
3154                 return -ENOMEM;
3155
3156         flags = nlmsg_alloc();
3157         if (!flags) {
3158                 nlmsg_free(msg);
3159                 return -ENOMEM;
3160         }
3161
3162         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3163                     0, NL80211_CMD_SET_STATION, 0);
3164
3165         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3166                     if_nametoindex(drv->ifname));
3167         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3168
3169         /*
3170          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3171          * can be removed eventually.
3172          */
3173         if (total_flags & WPA_STA_AUTHORIZED)
3174                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3175
3176         if (total_flags & WPA_STA_WMM)
3177                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3178
3179         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3180                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3181
3182         if (total_flags & WPA_STA_MFP)
3183                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3184
3185         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3186                 goto nla_put_failure;
3187
3188         os_memset(&upd, 0, sizeof(upd));
3189         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3190         upd.set = sta_flags_nl80211(flags_or);
3191         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3192
3193         nlmsg_free(flags);
3194
3195         return send_and_recv_msgs(drv, msg, NULL, NULL);
3196  nla_put_failure:
3197         nlmsg_free(flags);
3198         return -ENOBUFS;
3199 }
3200
3201
3202 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3203                                  struct wpa_driver_associate_params *params)
3204 {
3205         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3206             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3207                 nl80211_remove_monitor_interface(drv);
3208                 return -1;
3209         }
3210
3211         /* TODO: setup monitor interface (and add code somewhere to remove this
3212          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3213
3214         return 0;
3215 }
3216
3217
3218 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3219 {
3220         struct nl_msg *msg;
3221         int ret = -1;
3222
3223         msg = nlmsg_alloc();
3224         if (!msg)
3225                 return -1;
3226
3227         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3228                     NL80211_CMD_LEAVE_IBSS, 0);
3229         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3230         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3231         msg = NULL;
3232         if (ret) {
3233                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3234                            "(%s)", ret, strerror(-ret));
3235                 goto nla_put_failure;
3236         }
3237
3238         ret = 0;
3239         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3240
3241 nla_put_failure:
3242         nlmsg_free(msg);
3243         return ret;
3244 }
3245
3246
3247 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3248                                    struct wpa_driver_associate_params *params)
3249 {
3250         struct nl_msg *msg;
3251         int ret = -1;
3252         int count = 0;
3253
3254         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3255
3256         if (wpa_driver_nl80211_set_mode(drv, params->mode)) {
3257                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3258                            "IBSS mode");
3259                 return -1;
3260         }
3261
3262 retry:
3263         msg = nlmsg_alloc();
3264         if (!msg)
3265                 return -1;
3266
3267         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3268                     NL80211_CMD_JOIN_IBSS, 0);
3269         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3270
3271         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3272                 goto nla_put_failure;
3273
3274         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3275                           params->ssid, params->ssid_len);
3276         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3277                 params->ssid);
3278         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3279         drv->ssid_len = params->ssid_len;
3280
3281         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3282         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3283
3284         ret = nl80211_set_conn_keys(params, msg);
3285         if (ret)
3286                 goto nla_put_failure;
3287
3288         if (params->wpa_ie) {
3289                 wpa_hexdump(MSG_DEBUG,
3290                             "  * Extra IEs for Beacon/Probe Response frames",
3291                             params->wpa_ie, params->wpa_ie_len);
3292                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3293                         params->wpa_ie);
3294         }
3295
3296         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3297         msg = NULL;
3298         if (ret) {
3299                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3300                            ret, strerror(-ret));
3301                 count++;
3302                 if (ret == -EALREADY && count == 1) {
3303                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3304                                    "forced leave");
3305                         nl80211_leave_ibss(drv);
3306                         nlmsg_free(msg);
3307                         goto retry;
3308                 }
3309
3310                 goto nla_put_failure;
3311         }
3312         ret = 0;
3313         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3314
3315 nla_put_failure:
3316         nlmsg_free(msg);
3317         return ret;
3318 }
3319
3320
3321 static int wpa_driver_nl80211_connect(
3322         struct wpa_driver_nl80211_data *drv,
3323         struct wpa_driver_associate_params *params)
3324 {
3325         struct nl_msg *msg;
3326         enum nl80211_auth_type type;
3327         int ret = 0;
3328
3329         msg = nlmsg_alloc();
3330         if (!msg)
3331                 return -1;
3332
3333         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3334         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3335                     NL80211_CMD_CONNECT, 0);
3336
3337         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3338         if (params->bssid) {
3339                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3340                            MAC2STR(params->bssid));
3341                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3342         }
3343         if (params->freq) {
3344                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3345                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3346         }
3347         if (params->ssid) {
3348                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3349                                   params->ssid, params->ssid_len);
3350                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3351                         params->ssid);
3352                 if (params->ssid_len > sizeof(drv->ssid))
3353                         goto nla_put_failure;
3354                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3355                 drv->ssid_len = params->ssid_len;
3356         }
3357         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3358         if (params->wpa_ie)
3359                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3360                         params->wpa_ie);
3361
3362         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3363                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3364         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3365                 type = NL80211_AUTHTYPE_SHARED_KEY;
3366         else if (params->auth_alg & AUTH_ALG_LEAP)
3367                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3368         else if (params->auth_alg & AUTH_ALG_FT)
3369                 type = NL80211_AUTHTYPE_FT;
3370         else
3371                 goto nla_put_failure;
3372
3373         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3374         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3375
3376         if (params->wpa_ie && params->wpa_ie_len) {
3377                 enum nl80211_wpa_versions ver;
3378
3379                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3380                         ver = NL80211_WPA_VERSION_2;
3381                 else
3382                         ver = NL80211_WPA_VERSION_1;
3383
3384                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3385                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3386         }
3387
3388         if (params->pairwise_suite != CIPHER_NONE) {
3389                 int cipher;
3390
3391                 switch (params->pairwise_suite) {
3392                 case CIPHER_WEP40:
3393                         cipher = WLAN_CIPHER_SUITE_WEP40;
3394                         break;
3395                 case CIPHER_WEP104:
3396                         cipher = WLAN_CIPHER_SUITE_WEP104;
3397                         break;
3398                 case CIPHER_CCMP:
3399                         cipher = WLAN_CIPHER_SUITE_CCMP;
3400                         break;
3401                 case CIPHER_TKIP:
3402                 default:
3403                         cipher = WLAN_CIPHER_SUITE_TKIP;
3404                         break;
3405                 }
3406                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3407         }
3408
3409         if (params->group_suite != CIPHER_NONE) {
3410                 int cipher;
3411
3412                 switch (params->group_suite) {
3413                 case CIPHER_WEP40:
3414                         cipher = WLAN_CIPHER_SUITE_WEP40;
3415                         break;
3416                 case CIPHER_WEP104:
3417                         cipher = WLAN_CIPHER_SUITE_WEP104;
3418                         break;
3419                 case CIPHER_CCMP:
3420                         cipher = WLAN_CIPHER_SUITE_CCMP;
3421                         break;
3422                 case CIPHER_TKIP:
3423                 default:
3424                         cipher = WLAN_CIPHER_SUITE_TKIP;
3425                         break;
3426                 }
3427                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3428         }
3429
3430         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3431             params->key_mgmt_suite == KEY_MGMT_PSK) {
3432                 int mgmt = WLAN_AKM_SUITE_PSK;
3433
3434                 switch (params->key_mgmt_suite) {
3435                 case KEY_MGMT_802_1X:
3436                         mgmt = WLAN_AKM_SUITE_8021X;
3437                         break;
3438                 case KEY_MGMT_PSK:
3439                 default:
3440                         mgmt = WLAN_AKM_SUITE_PSK;
3441                         break;
3442                 }
3443                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3444         }
3445
3446         ret = nl80211_set_conn_keys(params, msg);
3447         if (ret)
3448                 goto nla_put_failure;
3449
3450         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3451         msg = NULL;
3452         if (ret) {
3453                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3454                            "(%s)", ret, strerror(-ret));
3455                 goto nla_put_failure;
3456         }
3457         ret = 0;
3458         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3459
3460 nla_put_failure:
3461         nlmsg_free(msg);
3462         return ret;
3463
3464 }
3465
3466
3467 static int wpa_driver_nl80211_associate(
3468         void *priv, struct wpa_driver_associate_params *params)
3469 {
3470         struct wpa_driver_nl80211_data *drv = priv;
3471         int ret = -1;
3472         struct nl_msg *msg;
3473
3474         if (params->mode == IEEE80211_MODE_AP)
3475                 return wpa_driver_nl80211_ap(drv, params);
3476
3477         if (params->mode == IEEE80211_MODE_IBSS)
3478                 return wpa_driver_nl80211_ibss(drv, params);
3479
3480         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3481                 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3482                         return -1;
3483                 return wpa_driver_nl80211_connect(drv, params);
3484         }
3485
3486         drv->associated = 0;
3487
3488         msg = nlmsg_alloc();
3489         if (!msg)
3490                 return -1;
3491
3492         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3493                    drv->ifindex);
3494         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3495                     NL80211_CMD_ASSOCIATE, 0);
3496
3497         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3498         if (params->bssid) {
3499                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3500                            MAC2STR(params->bssid));
3501                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3502         }
3503         if (params->freq) {
3504                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3505                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3506                 drv->assoc_freq = params->freq;
3507         } else
3508                 drv->assoc_freq = 0;
3509         if (params->ssid) {
3510                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3511                                   params->ssid, params->ssid_len);
3512                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3513                         params->ssid);
3514                 if (params->ssid_len > sizeof(drv->ssid))
3515                         goto nla_put_failure;
3516                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3517                 drv->ssid_len = params->ssid_len;
3518         }
3519         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3520         if (params->wpa_ie)
3521                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3522                         params->wpa_ie);
3523
3524 #ifdef CONFIG_IEEE80211W
3525         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3526                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3527 #endif /* CONFIG_IEEE80211W */
3528
3529         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3530
3531         if (params->prev_bssid) {
3532                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3533                            MAC2STR(params->prev_bssid));
3534                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3535                         params->prev_bssid);
3536         }
3537
3538         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3539         msg = NULL;
3540         if (ret) {
3541                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3542                            "(%s)", ret, strerror(-ret));
3543                 goto nla_put_failure;
3544         }
3545         ret = 0;
3546         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3547                    "successfully");
3548
3549 nla_put_failure:
3550         nlmsg_free(msg);
3551         return ret;
3552 }
3553
3554
3555 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3556                             int ifindex, int mode)
3557 {
3558         struct nl_msg *msg;
3559         int ret = -ENOBUFS;
3560
3561         msg = nlmsg_alloc();
3562         if (!msg)
3563                 return -ENOMEM;
3564
3565         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3566                     0, NL80211_CMD_SET_INTERFACE, 0);
3567         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3568         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3569
3570         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3571         if (!ret)
3572                 return 0;
3573 nla_put_failure:
3574         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3575                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3576         return ret;
3577 }
3578
3579
3580 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3581 {
3582         struct wpa_driver_nl80211_data *drv = priv;
3583         int ret = -1;
3584         int nlmode;
3585
3586         switch (mode) {
3587         case 0:
3588                 nlmode = NL80211_IFTYPE_STATION;
3589                 break;
3590         case 1:
3591                 nlmode = NL80211_IFTYPE_ADHOC;
3592                 break;
3593         case 2:
3594                 nlmode = NL80211_IFTYPE_AP;
3595                 break;
3596         default:
3597                 return -1;
3598         }
3599
3600         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3601                 drv->nlmode = nlmode;
3602                 ret = 0;
3603                 goto done;
3604         }
3605
3606         if (nlmode == drv->nlmode) {
3607                 wpa_printf(MSG_DEBUG, "nl80211: Interface already in "
3608                            "requested mode - ignore error");
3609                 ret = 0;
3610                 goto done; /* Already in the requested mode */
3611         }
3612
3613         /* mac80211 doesn't allow mode changes while the device is up, so
3614          * take the device down, try to set the mode again, and bring the
3615          * device back up.
3616          */
3617         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3618                 /* Try to set the mode again while the interface is down */
3619                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3620                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3621                         ret = -1;
3622         }
3623
3624         if (!ret) {
3625                 wpa_printf(MSG_DEBUG, "nl80211: Mode change succeeded while "
3626                            "interface is down");
3627                 drv->nlmode = nlmode;
3628         }
3629
3630 done:
3631         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3632                 /* Setup additional AP mode functionality if needed */
3633                 if (drv->monitor_ifidx < 0 &&
3634                     nl80211_create_monitor_interface(drv))
3635                         return -1;
3636         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3637                 /* Remove additional AP mode functionality */
3638                 nl80211_remove_monitor_interface(drv);
3639         }
3640
3641         if (ret)
3642                 wpa_printf(MSG_DEBUG, "nl80211: Interface mode change to %d "
3643                            "from %d failed", nlmode, drv->nlmode);
3644
3645         return ret;
3646 }
3647
3648
3649 static int wpa_driver_nl80211_get_capa(void *priv,
3650                                        struct wpa_driver_capa *capa)
3651 {
3652         struct wpa_driver_nl80211_data *drv = priv;
3653         if (!drv->has_capability)
3654                 return -1;
3655         os_memcpy(capa, &drv->capa, sizeof(*capa));
3656         return 0;
3657 }
3658
3659
3660 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3661 {
3662         struct wpa_driver_nl80211_data *drv = priv;
3663
3664         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3665                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3666         drv->operstate = state;
3667         return netlink_send_oper_ifla(drv->netlink, drv->ifindex, -1,
3668                                       state ? IF_OPER_UP : IF_OPER_DORMANT);
3669 }
3670
3671
3672 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3673 {
3674         struct wpa_driver_nl80211_data *drv = priv;
3675         struct nl_msg *msg;
3676         struct nl80211_sta_flag_update upd;
3677
3678         msg = nlmsg_alloc();
3679         if (!msg)
3680                 return -ENOMEM;
3681
3682         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3683                     0, NL80211_CMD_SET_STATION, 0);
3684
3685         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3686                     if_nametoindex(drv->ifname));
3687         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3688
3689         os_memset(&upd, 0, sizeof(upd));
3690         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3691         if (authorized)
3692                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3693         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3694
3695         return send_and_recv_msgs(drv, msg, NULL, NULL);
3696  nla_put_failure:
3697         return -ENOBUFS;
3698 }
3699
3700
3701 #ifdef HOSTAPD
3702
3703 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3704                                  int ifindex)
3705 {
3706         struct i802_bss *bss = &drv->bss;
3707         while (bss) {
3708                 if (ifindex == bss->ifindex)
3709                         return bss;
3710                 bss = bss->next;
3711         }
3712         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3713         return NULL;
3714 }
3715
3716
3717 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3718 {
3719         int i;
3720         int *old;
3721
3722         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3723                    ifidx);
3724         for (i = 0; i < drv->num_if_indices; i++) {
3725                 if (drv->if_indices[i] == 0) {
3726                         drv->if_indices[i] = ifidx;
3727                         return;
3728                 }
3729         }
3730
3731         if (drv->if_indices != drv->default_if_indices)
3732                 old = drv->if_indices;
3733         else
3734                 old = NULL;
3735
3736         drv->if_indices = os_realloc(old,
3737                                      sizeof(int) * (drv->num_if_indices + 1));
3738         if (!drv->if_indices) {
3739                 if (!old)
3740                         drv->if_indices = drv->default_if_indices;
3741                 else
3742                         drv->if_indices = old;
3743                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3744                            "interfaces");
3745                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3746                 return;
3747         }
3748         drv->if_indices[drv->num_if_indices] = ifidx;
3749         drv->num_if_indices++;
3750 }
3751
3752
3753 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3754 {
3755         int i;
3756
3757         for (i = 0; i < drv->num_if_indices; i++) {
3758                 if (drv->if_indices[i] == ifidx) {
3759                         drv->if_indices[i] = 0;
3760                         break;
3761                 }
3762         }
3763 }
3764
3765
3766 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3767 {
3768         int i;
3769
3770         for (i = 0; i < drv->num_if_indices; i++)
3771                 if (drv->if_indices[i] == ifidx)
3772                         return 1;
3773
3774         return 0;
3775 }
3776
3777
3778 static inline int min_int(int a, int b)
3779 {
3780         if (a < b)
3781                 return a;
3782         return b;
3783 }
3784
3785
3786 static int get_key_handler(struct nl_msg *msg, void *arg)
3787 {
3788         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3789         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3790
3791         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3792                   genlmsg_attrlen(gnlh, 0), NULL);
3793
3794         /*
3795          * TODO: validate the key index and mac address!
3796          * Otherwise, there's a race condition as soon as
3797          * the kernel starts sending key notifications.
3798          */
3799
3800         if (tb[NL80211_ATTR_KEY_SEQ])
3801                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3802                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3803         return NL_SKIP;
3804 }
3805
3806
3807 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3808                            int idx, u8 *seq)
3809 {
3810         struct wpa_driver_nl80211_data *drv = priv;
3811         struct nl_msg *msg;
3812
3813         msg = nlmsg_alloc();
3814         if (!msg)
3815                 return -ENOMEM;
3816
3817         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3818                     0, NL80211_CMD_GET_KEY, 0);
3819
3820         if (addr)
3821                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3822         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3823         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3824
3825         memset(seq, 0, 6);
3826
3827         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3828  nla_put_failure:
3829         return -ENOBUFS;
3830 }
3831
3832
3833 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3834                               int mode)
3835 {
3836         struct wpa_driver_nl80211_data *drv = priv;
3837         struct nl_msg *msg;
3838         u8 rates[NL80211_MAX_SUPP_RATES];
3839         u8 rates_len = 0;
3840         int i;
3841
3842         msg = nlmsg_alloc();
3843         if (!msg)
3844                 return -ENOMEM;
3845
3846         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3847                     NL80211_CMD_SET_BSS, 0);
3848
3849         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3850                 rates[rates_len++] = basic_rates[i] / 5;
3851
3852         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3853
3854         /* TODO: multi-BSS support */
3855         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3856
3857         return send_and_recv_msgs(drv, msg, NULL, NULL);
3858  nla_put_failure:
3859         return -ENOBUFS;
3860 }
3861
3862
3863 /* Set kernel driver on given frequency (MHz) */
3864 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3865 {
3866         struct wpa_driver_nl80211_data *drv = priv;
3867         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3868                                            freq->sec_channel_offset);
3869 }
3870
3871
3872 static int i802_set_rts(void *priv, int rts)
3873 {
3874         struct wpa_driver_nl80211_data *drv = priv;
3875         struct nl_msg *msg;
3876         int ret = -ENOBUFS;
3877         u32 val;
3878
3879         msg = nlmsg_alloc();
3880         if (!msg)
3881                 return -ENOMEM;
3882
3883         if (rts >= 2347)
3884                 val = (u32) -1;
3885         else
3886                 val = rts;
3887
3888         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3889                     0, NL80211_CMD_SET_WIPHY, 0);
3890         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3891         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3892
3893         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3894         if (!ret)
3895                 return 0;
3896 nla_put_failure:
3897         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3898                    "%d (%s)", rts, ret, strerror(-ret));
3899         return ret;
3900 }
3901
3902
3903 static int i802_set_frag(void *priv, int frag)
3904 {
3905         struct wpa_driver_nl80211_data *drv = priv;
3906         struct nl_msg *msg;
3907         int ret = -ENOBUFS;
3908         u32 val;
3909
3910         msg = nlmsg_alloc();
3911         if (!msg)
3912                 return -ENOMEM;
3913
3914         if (frag >= 2346)
3915                 val = (u32) -1;
3916         else
3917                 val = frag;
3918
3919         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3920                     0, NL80211_CMD_SET_WIPHY, 0);
3921         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3922         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3923
3924         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3925         if (!ret)
3926                 return 0;
3927 nla_put_failure:
3928         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3929                    "%d: %d (%s)", frag, ret, strerror(-ret));
3930         return ret;
3931 }
3932
3933
3934 static int i802_flush(void *priv)
3935 {
3936         struct wpa_driver_nl80211_data *drv = priv;
3937         struct nl_msg *msg;
3938
3939         msg = nlmsg_alloc();
3940         if (!msg)
3941                 return -1;
3942
3943         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3944                     0, NL80211_CMD_DEL_STATION, 0);
3945
3946         /*
3947          * XXX: FIX! this needs to flush all VLANs too
3948          */
3949         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3950                     if_nametoindex(drv->ifname));
3951
3952         return send_and_recv_msgs(drv, msg, NULL, NULL);
3953  nla_put_failure:
3954         return -ENOBUFS;
3955 }
3956
3957
3958 static int get_sta_handler(struct nl_msg *msg, void *arg)
3959 {
3960         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3961         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3962         struct hostap_sta_driver_data *data = arg;
3963         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3964         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3965                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3966                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3967                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3968                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3969                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3970         };
3971
3972         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3973                   genlmsg_attrlen(gnlh, 0), NULL);
3974
3975         /*
3976          * TODO: validate the interface and mac address!
3977          * Otherwise, there's a race condition as soon as
3978          * the kernel starts sending station notifications.
3979          */
3980
3981         if (!tb[NL80211_ATTR_STA_INFO]) {
3982                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3983                 return NL_SKIP;
3984         }
3985         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3986                              tb[NL80211_ATTR_STA_INFO],
3987                              stats_policy)) {
3988                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3989                 return NL_SKIP;
3990         }
3991
3992         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3993                 data->inactive_msec =
3994                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3995         if (stats[NL80211_STA_INFO_RX_BYTES])
3996                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3997         if (stats[NL80211_STA_INFO_TX_BYTES])
3998                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3999         if (stats[NL80211_STA_INFO_RX_PACKETS])
4000                 data->rx_packets =
4001                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4002         if (stats[NL80211_STA_INFO_TX_PACKETS])
4003                 data->tx_packets =
4004                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4005
4006         return NL_SKIP;
4007 }
4008
4009 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4010                               const u8 *addr)
4011 {
4012         struct wpa_driver_nl80211_data *drv = priv;
4013         struct nl_msg *msg;
4014
4015         os_memset(data, 0, sizeof(*data));
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_STATION, 0);
4022
4023         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4024         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4025
4026         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4027  nla_put_failure:
4028         return -ENOBUFS;
4029 }
4030
4031
4032 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4033                                     int cw_min, int cw_max, int burst_time)
4034 {
4035         struct wpa_driver_nl80211_data *drv = priv;
4036         struct nl_msg *msg;
4037         struct nlattr *txq, *params;
4038
4039         msg = nlmsg_alloc();
4040         if (!msg)
4041                 return -1;
4042
4043         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4044                     0, NL80211_CMD_SET_WIPHY, 0);
4045
4046         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4047
4048         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4049         if (!txq)
4050                 goto nla_put_failure;
4051
4052         /* We are only sending parameters for a single TXQ at a time */
4053         params = nla_nest_start(msg, 1);
4054         if (!params)
4055                 goto nla_put_failure;
4056
4057         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4058         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4059          * 32 usec, so need to convert the value here. */
4060         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4061         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4062         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4063         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4064
4065         nla_nest_end(msg, params);
4066
4067         nla_nest_end(msg, txq);
4068
4069         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4070                 return 0;
4071  nla_put_failure:
4072         return -1;
4073 }
4074
4075
4076 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4077 {
4078         struct wpa_driver_nl80211_data *drv = priv;
4079         struct nl_msg *msg;
4080
4081         msg = nlmsg_alloc();
4082         if (!msg)
4083                 return -ENOMEM;
4084
4085         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4086                     NL80211_CMD_SET_BSS, 0);
4087
4088         if (cts >= 0)
4089                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4090         if (preamble >= 0)
4091                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4092         if (slot >= 0)
4093                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4094
4095         /* TODO: multi-BSS support */
4096         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4097
4098         return send_and_recv_msgs(drv, msg, NULL, NULL);
4099  nla_put_failure:
4100         return -ENOBUFS;
4101 }
4102
4103
4104 static int i802_set_cts_protect(void *priv, int value)
4105 {
4106         return i802_set_bss(priv, value, -1, -1);
4107 }
4108
4109
4110 static int i802_set_preamble(void *priv, int value)
4111 {
4112         return i802_set_bss(priv, -1, value, -1);
4113 }
4114
4115
4116 static int i802_set_short_slot_time(void *priv, int value)
4117 {
4118         return i802_set_bss(priv, -1, -1, value);
4119 }
4120
4121
4122 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4123                              const char *ifname, int vlan_id)
4124 {
4125         struct wpa_driver_nl80211_data *drv = priv;
4126         struct nl_msg *msg;
4127
4128         msg = nlmsg_alloc();
4129         if (!msg)
4130                 return -ENOMEM;
4131
4132         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4133                     0, NL80211_CMD_SET_STATION, 0);
4134
4135         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4136                     if_nametoindex(drv->ifname));
4137         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4138         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4139                     if_nametoindex(ifname));
4140
4141         return send_and_recv_msgs(drv, msg, NULL, NULL);
4142  nla_put_failure:
4143         return -ENOBUFS;
4144 }
4145
4146
4147 static int i802_set_wds_sta(void *priv, const u8 *addr, int aid, int val)
4148 {
4149         struct wpa_driver_nl80211_data *drv = priv;
4150         char name[16];
4151
4152         os_snprintf(name, sizeof(name), "%s.sta%d", drv->ifname, aid);
4153         if (val) {
4154                 if (nl80211_create_iface(priv, name, NL80211_IFTYPE_AP_VLAN,
4155                                          NULL, 1) < 0)
4156                         return -1;
4157                 hostapd_set_iface_flags(drv, name, 1);
4158                 return i802_set_sta_vlan(priv, addr, name, 0);
4159         } else {
4160                 i802_set_sta_vlan(priv, addr, drv->ifname, 0);
4161                 return wpa_driver_nl80211_if_remove(priv, WPA_IF_AP_VLAN,
4162                                                     name);
4163         }
4164 }
4165
4166
4167 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4168 {
4169         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4170         struct sockaddr_ll lladdr;
4171         unsigned char buf[3000];
4172         int len;
4173         socklen_t fromlen = sizeof(lladdr);
4174
4175         len = recvfrom(sock, buf, sizeof(buf), 0,
4176                        (struct sockaddr *)&lladdr, &fromlen);
4177         if (len < 0) {
4178                 perror("recv");
4179                 return;
4180         }
4181
4182         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4183                 void *ctx;
4184                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4185                 if (!ctx)
4186                         return;
4187                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4188         }
4189 }
4190
4191
4192 static int i802_get_inact_sec(void *priv, const u8 *addr)
4193 {
4194         struct hostap_sta_driver_data data;
4195         int ret;
4196
4197         data.inactive_msec = (unsigned long) -1;
4198         ret = i802_read_sta_data(priv, &data, addr);
4199         if (ret || data.inactive_msec == (unsigned long) -1)
4200                 return -1;
4201         return data.inactive_msec / 1000;
4202 }
4203
4204
4205 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4206 {
4207 #if 0
4208         /* TODO */
4209 #endif
4210         return 0;
4211 }
4212
4213
4214 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4215                            int reason)
4216 {
4217         struct wpa_driver_nl80211_data *drv = priv;
4218         struct ieee80211_mgmt mgmt;
4219
4220         memset(&mgmt, 0, sizeof(mgmt));
4221         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4222                                           WLAN_FC_STYPE_DEAUTH);
4223         memcpy(mgmt.da, addr, ETH_ALEN);
4224         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4225         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4226         mgmt.u.deauth.reason_code = host_to_le16(reason);
4227         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4228                                             IEEE80211_HDRLEN +
4229                                             sizeof(mgmt.u.deauth));
4230 }
4231
4232
4233 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4234                              int reason)
4235 {
4236         struct wpa_driver_nl80211_data *drv = priv;
4237         struct ieee80211_mgmt mgmt;
4238
4239         memset(&mgmt, 0, sizeof(mgmt));
4240         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4241                                           WLAN_FC_STYPE_DISASSOC);
4242         memcpy(mgmt.da, addr, ETH_ALEN);
4243         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4244         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4245         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4246         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4247                                             IEEE80211_HDRLEN +
4248                                             sizeof(mgmt.u.disassoc));
4249 }
4250
4251
4252 static void *i802_init(struct hostapd_data *hapd,
4253                        struct wpa_init_params *params)
4254 {
4255         struct wpa_driver_nl80211_data *drv;
4256         size_t i;
4257
4258         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4259         if (drv == NULL)
4260                 return NULL;
4261
4262         drv->bss.ifindex = drv->ifindex;
4263
4264         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4265         drv->if_indices = drv->default_if_indices;
4266         for (i = 0; i < params->num_bridge; i++) {
4267                 if (params->bridge[i])
4268                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4269         }
4270
4271         /* start listening for EAPOL on the default AP interface */
4272         add_ifidx(drv, drv->ifindex);
4273
4274         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4275                 goto failed;
4276
4277         if (params->bssid) {
4278                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4279                         goto failed;
4280         }
4281
4282         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
4283                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4284                            "into AP mode", drv->ifname);
4285                 goto failed;
4286         }
4287
4288         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4289                 goto failed;
4290
4291         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4292         if (drv->eapol_sock < 0) {
4293                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4294                 goto failed;
4295         }
4296
4297         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4298         {
4299                 printf("Could not register read socket for eapol\n");
4300                 goto failed;
4301         }
4302
4303         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4304                 goto failed;
4305
4306         return drv;
4307
4308 failed:
4309         nl80211_remove_monitor_interface(drv);
4310         if (drv->ioctl_sock >= 0)
4311                 close(drv->ioctl_sock);
4312
4313         genl_family_put(drv->nl80211);
4314         nl_cache_free(drv->nl_cache);
4315         nl_handle_destroy(drv->nl_handle);
4316         nl_cb_put(drv->nl_cb);
4317
4318         os_free(drv);
4319         return NULL;
4320 }
4321
4322
4323 static void i802_deinit(void *priv)
4324 {
4325         wpa_driver_nl80211_deinit(priv);
4326 }
4327
4328 #endif /* HOSTAPD */
4329
4330
4331 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4332         enum wpa_driver_if_type type)
4333 {
4334         switch (type) {
4335         case WPA_IF_STATION:
4336                 return NL80211_IFTYPE_STATION;
4337         case WPA_IF_AP_VLAN:
4338                 return NL80211_IFTYPE_AP_VLAN;
4339         case WPA_IF_AP_BSS:
4340                 return NL80211_IFTYPE_AP;
4341         }
4342         return -1;
4343 }
4344
4345
4346 static int wpa_driver_nl80211_if_add(const char *iface, void *priv,
4347                                      enum wpa_driver_if_type type,
4348                                      const char *ifname, const u8 *addr,
4349                                      void *bss_ctx)
4350 {
4351         struct wpa_driver_nl80211_data *drv = priv;
4352         int ifidx;
4353 #ifdef HOSTAPD
4354         struct i802_bss *bss = NULL;
4355
4356         if (type == WPA_IF_AP_BSS) {
4357                 bss = os_zalloc(sizeof(*bss));
4358                 if (bss == NULL)
4359                         return -1;
4360         }
4361 #endif /* HOSTAPD */
4362
4363         ifidx = nl80211_create_iface(drv, ifname,
4364                                      wpa_driver_nl80211_if_type(type), addr,
4365                                      0);
4366         if (ifidx < 0) {
4367 #ifdef HOSTAPD
4368                 os_free(bss);
4369 #endif /* HOSTAPD */
4370                 return -1;
4371         }
4372
4373 #ifdef HOSTAPD
4374         if (type == WPA_IF_AP_BSS) {
4375                 if (hostapd_set_iface_flags(priv, ifname, 1)) {
4376                         nl80211_remove_iface(priv, ifidx);
4377                         os_free(bss);
4378                         return -1;
4379                 }
4380                 bss->ifindex = ifidx;
4381                 bss->next = drv->bss.next;
4382                 drv->bss.next = bss;
4383         }
4384 #endif /* HOSTAPD */
4385
4386         return 0;
4387 }
4388
4389
4390 static int wpa_driver_nl80211_if_remove(void *priv,
4391                                         enum wpa_driver_if_type type,
4392                                         const char *ifname)
4393 {
4394         struct wpa_driver_nl80211_data *drv = priv;
4395         int ifindex = if_nametoindex(ifname);
4396
4397         nl80211_remove_iface(drv, ifindex);
4398
4399 #ifdef HOSTAPD
4400         if (type == WPA_IF_AP_BSS) {
4401                 struct i802_bss *bss, *prev;
4402                 prev = &drv->bss;
4403                 bss = drv->bss.next;
4404                 while (bss) {
4405                         if (ifindex == bss->ifindex) {
4406                                 prev->next = bss->next;
4407                                 os_free(bss);
4408                                 break;
4409                         }
4410                         prev = bss;
4411                         bss = bss->next;
4412                 }
4413         }
4414 #endif /* HOSTAPD */
4415
4416         return 0;
4417 }
4418
4419
4420 static void wpa_driver_nl80211_probe_req_report_timeout(void *eloop_ctx,
4421                                                         void *timeout_ctx)
4422 {
4423         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4424         if (drv->monitor_ifidx < 0)
4425                 return; /* monitor interface already removed */
4426
4427         if (drv->nlmode != NL80211_IFTYPE_STATION)
4428                 return; /* not in station mode anymore */
4429
4430         if (drv->probe_req_report)
4431                 return; /* reporting enabled */
4432
4433         wpa_printf(MSG_DEBUG, "nl80211: Remove monitor interface due to no "
4434                    "Probe Request reporting needed anymore");
4435         nl80211_remove_monitor_interface(drv);
4436 }
4437
4438
4439 static int wpa_driver_nl80211_probe_req_report(void *priv, int report)
4440 {
4441         struct wpa_driver_nl80211_data *drv = priv;
4442
4443         if (drv->nlmode != NL80211_IFTYPE_STATION) {
4444                 wpa_printf(MSG_DEBUG, "nl80211: probe_req_report control only "
4445                            "allowed in station mode (iftype=%d)",
4446                            drv->nlmode);
4447                 return -1;
4448         }
4449         drv->probe_req_report = report;
4450
4451         if (report) {
4452                 eloop_cancel_timeout(
4453                         wpa_driver_nl80211_probe_req_report_timeout,
4454                         drv, NULL);
4455                 if (drv->monitor_ifidx < 0 &&
4456                     nl80211_create_monitor_interface(drv))
4457                         return -1;
4458         } else {
4459                 /*
4460                  * It takes a while to remove the monitor interface, so try to
4461                  * avoid doing this if it is needed again shortly. Instead,
4462                  * schedule the interface to be removed later if no need for it
4463                  * is seen.
4464                  */
4465                 wpa_printf(MSG_DEBUG, "nl80211: Scheduling monitor interface "
4466                            "to be removed after 10 seconds of no use");
4467                 eloop_register_timeout(
4468                         10, 0, wpa_driver_nl80211_probe_req_report_timeout,
4469                         drv, NULL);
4470         }
4471
4472         return 0;
4473 }
4474
4475
4476 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4477         .name = "nl80211",
4478         .desc = "Linux nl80211/cfg80211",
4479         .get_bssid = wpa_driver_nl80211_get_bssid,
4480         .get_ssid = wpa_driver_nl80211_get_ssid,
4481         .set_key = wpa_driver_nl80211_set_key,
4482         .scan2 = wpa_driver_nl80211_scan,
4483         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4484         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4485         .disassociate = wpa_driver_nl80211_disassociate,
4486         .authenticate = wpa_driver_nl80211_authenticate,
4487         .associate = wpa_driver_nl80211_associate,
4488         .init = wpa_driver_nl80211_init,
4489         .deinit = wpa_driver_nl80211_deinit,
4490         .get_capa = wpa_driver_nl80211_get_capa,
4491         .set_operstate = wpa_driver_nl80211_set_operstate,
4492         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4493         .set_country = wpa_driver_nl80211_set_country,
4494         .set_beacon = wpa_driver_nl80211_set_beacon,
4495         .if_add = wpa_driver_nl80211_if_add,
4496         .if_remove = wpa_driver_nl80211_if_remove,
4497         .send_mlme = wpa_driver_nl80211_send_mlme,
4498         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4499         .sta_add = wpa_driver_nl80211_sta_add,
4500         .sta_remove = wpa_driver_nl80211_sta_remove,
4501         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4502         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4503 #ifdef HOSTAPD
4504         .hapd_init = i802_init,
4505         .hapd_deinit = i802_deinit,
4506         .get_seqnum = i802_get_seqnum,
4507         .flush = i802_flush,
4508         .read_sta_data = i802_read_sta_data,
4509         .sta_deauth = i802_sta_deauth,
4510         .sta_disassoc = i802_sta_disassoc,
4511         .get_inact_sec = i802_get_inact_sec,
4512         .sta_clear_stats = i802_sta_clear_stats,
4513         .set_freq = i802_set_freq,
4514         .set_rts = i802_set_rts,
4515         .set_frag = i802_set_frag,
4516         .set_rate_sets = i802_set_rate_sets,
4517         .set_cts_protect = i802_set_cts_protect,
4518         .set_preamble = i802_set_preamble,
4519         .set_short_slot_time = i802_set_short_slot_time,
4520         .set_tx_queue_params = i802_set_tx_queue_params,
4521         .set_sta_vlan = i802_set_sta_vlan,
4522         .set_wds_sta = i802_set_wds_sta,
4523 #endif /* HOSTAPD */
4524         .probe_req_report = wpa_driver_nl80211_probe_req_report,
4525 };