src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if_arp.h>
  22 #include <net/if.h>
  23 #include <netlink/genl/genl.h>
  24 #include <netlink/genl/family.h>
  25 #include <netlink/genl/ctrl.h>
  26 #include "nl80211_copy.h"
  27
  28 #include "common.h"
  29 #include "driver.h"
  30 #include "eloop.h"
  31 #include "ieee802_11_defs.h"
  32
  33 #if defined(CONFIG_AP) || defined(HOSTAPD)
  34 #include <netpacket/packet.h>
  35 #include <linux/filter.h>
  36 #include "radiotap.h"
  37 #include "radiotap_iter.h"
  38
  39 #include "../../hostapd/hostapd_defs.h"
  40 #include "../../hostapd/sta_flags.h"
  41 #endif /* CONFIG_AP || HOSTAPD */
  42
  43 #ifdef HOSTAPD
  44 #include "ieee802_11_common.h"
  45 #endif /* HOSTAPD */
  46
  47 #ifdef CONFIG_LIBNL20
  48 /* libnl 2.0 compatibility code */
  49 #define nl_handle nl_sock
  50 #define nl_handle_alloc_cb nl_socket_alloc_cb
  51 #define nl_handle_destroy nl_socket_free
  52 #endif /* CONFIG_LIBNL20 */
  53
  54
  55 #ifndef IFF_LOWER_UP
  56 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  57 #endif
  58 #ifndef IFF_DORMANT
  59 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  60 #endif
  61
  62 #ifndef IF_OPER_DORMANT
  63 #define IF_OPER_DORMANT 5
  64 #endif
  65 #ifndef IF_OPER_UP
  66 #define IF_OPER_UP 6
  67 #endif
  68
  69 struct i802_bss {
  70         struct i802_bss *next;
  71         int ifindex;
  72         unsigned int beacon_set:1;
  73 };
  74
  75 struct wpa_driver_nl80211_data {
  76         void *ctx;
  77         int link_event_sock;
  78         int ioctl_sock; /* socket for ioctl() use */
  79         char ifname[IFNAMSIZ + 1];
  80         int ifindex;
  81         int if_removed;
  82         struct wpa_driver_capa capa;
  83         int has_capability;
  84
  85         int operstate;
  86
  87         int scan_complete_events;
  88
  89         struct nl_handle *nl_handle;
  90         struct nl_handle *nl_handle_event;
  91         struct nl_cache *nl_cache;
  92         struct nl_cache *nl_cache_event;
  93         struct nl_cb *nl_cb;
  94         struct genl_family *nl80211;
  95
  96         u8 bssid[ETH_ALEN];
  97         int associated;
  98         u8 ssid[32];
  99         size_t ssid_len;
 100         int nlmode;
 101         int ap_scan_as_station;
 102
 103         int monitor_sock;
 104         int monitor_ifidx;
 105
 106         unsigned int beacon_set:1;
 107
 108 #ifdef HOSTAPD
 109         int eapol_sock; /* socket for EAPOL frames */
 110
 111         int default_if_indices[16];
 112         int *if_indices;
 113         int num_if_indices;
 114
 115         struct i802_bss bss;
 116
 117         int last_freq;
 118         int last_freq_ht;
 119 #endif /* HOSTAPD */
 120 };
 121
 122
 123 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 124                                             void *timeout_ctx);
 125 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 126 static int
 127 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 128
 129 #if defined(CONFIG_AP) || defined(HOSTAPD)
 130 static void nl80211_remove_monitor_interface(
 131         struct wpa_driver_nl80211_data *drv);
 132 #endif /* CONFIG_AP || HOSTAPD */
 133
 134 #ifdef CONFIG_AP
 135 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 136                                  int ifidx);
 137 #endif /* CONFIG_AP */
 138
 139 #ifdef HOSTAPD
 140 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 141 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 142 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 143                                  int ifindex);
 144 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 145                                  int ifidx);
 146 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 147 #endif /* HOSTAPD */
 148
 149
 150 /* nl80211 code */
 151 static int ack_handler(struct nl_msg *msg, void *arg)
 152 {
 153         int *err = arg;
 154         *err = 0;
 155         return NL_STOP;
 156 }
 157
 158 static int finish_handler(struct nl_msg *msg, void *arg)
 159 {
 160         int *ret = arg;
 161         *ret = 0;
 162         return NL_SKIP;
 163 }
 164
 165 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 166                          void *arg)
 167 {
 168         int *ret = arg;
 169         *ret = err->error;
 170         return NL_SKIP;
 171 }
 172
 173
 174 static int no_seq_check(struct nl_msg *msg, void *arg)
 175 {
 176         return NL_OK;
 177 }
 178
 179
 180 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 181                               struct nl_msg *msg,
 182                               int (*valid_handler)(struct nl_msg *, void *),
 183                               void *valid_data)
 184 {
 185         struct nl_cb *cb;
 186         int err = -ENOMEM;
 187
 188         cb = nl_cb_clone(drv->nl_cb);
 189         if (!cb)
 190                 goto out;
 191
 192         err = nl_send_auto_complete(drv->nl_handle, msg);
 193         if (err < 0)
 194                 goto out;
 195
 196         err = 1;
 197
 198         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 199         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 200         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 201
 202         if (valid_handler)
 203                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 204                           valid_handler, valid_data);
 205
 206         while (err > 0)
 207                 nl_recvmsgs(drv->nl_handle, cb);
 208  out:
 209         nl_cb_put(cb);
 210         nlmsg_free(msg);
 211         return err;
 212 }
 213
 214
 215 struct family_data {
 216         const char *group;
 217         int id;
 218 };
 219
 220
 221 static int family_handler(struct nl_msg *msg, void *arg)
 222 {
 223         struct family_data *res = arg;
 224         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 225         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 226         struct nlattr *mcgrp;
 227         int i;
 228
 229         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 230                   genlmsg_attrlen(gnlh, 0), NULL);
 231         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 232                 return NL_SKIP;
 233
 234         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 235                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 236                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 237                           nla_len(mcgrp), NULL);
 238                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 239                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 240                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 241                                res->group,
 242                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 243                         continue;
 244                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 245                 break;
 246         };
 247
 248         return NL_SKIP;
 249 }
 250
 251
 252 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 253                                const char *family, const char *group)
 254 {
 255         struct nl_msg *msg;
 256         int ret = -1;
 257         struct family_data res = { group, -ENOENT };
 258
 259         msg = nlmsg_alloc();
 260         if (!msg)
 261                 return -ENOMEM;
 262         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 263                     0, 0, CTRL_CMD_GETFAMILY, 0);
 264         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 265
 266         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 267         msg = NULL;
 268         if (ret == 0)
 269                 ret = res.id;
 270
 271 nla_put_failure:
 272         nlmsg_free(msg);
 273         return ret;
 274 }
 275
 276
 277 #ifdef HOSTAPD
 278 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 279                         const char *ifname, u8 *addr)
 280 {
 281         struct ifreq ifr;
 282
 283         os_memset(&ifr, 0, sizeof(ifr));
 284         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 285         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 286                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 287                            ifname, errno, strerror(errno));
 288                 return -1;
 289         }
 290
 291         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 292                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 293                            ifname, ifr.ifr_hwaddr.sa_family);
 294                 return -1;
 295         }
 296         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 297
 298         return 0;
 299 }
 300
 301
 302 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 303                         const char *ifname, const u8 *addr)
 304 {
 305         struct ifreq ifr;
 306
 307         os_memset(&ifr, 0, sizeof(ifr));
 308         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 309         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 310         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 311
 312         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 313                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 314                            ifname, errno, strerror(errno));
 315                 return -1;
 316         }
 317
 318         return 0;
 319 }
 320 #endif /* HOSTAPD */
 321
 322
 323 #ifndef HOSTAPD
 324
 325 static int wpa_driver_nl80211_send_oper_ifla(
 326         struct wpa_driver_nl80211_data *drv,
 327         int linkmode, int operstate)
 328 {
 329         struct {
 330                 struct nlmsghdr hdr;
 331                 struct ifinfomsg ifinfo;
 332                 char opts[16];
 333         } req;
 334         struct rtattr *rta;
 335         static int nl_seq;
 336         ssize_t ret;
 337
 338         os_memset(&req, 0, sizeof(req));
 339
 340         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 341         req.hdr.nlmsg_type = RTM_SETLINK;
 342         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 343         req.hdr.nlmsg_seq = ++nl_seq;
 344         req.hdr.nlmsg_pid = 0;
 345
 346         req.ifinfo.ifi_family = AF_UNSPEC;
 347         req.ifinfo.ifi_type = 0;
 348         req.ifinfo.ifi_index = drv->ifindex;
 349         req.ifinfo.ifi_flags = 0;
 350         req.ifinfo.ifi_change = 0;
 351
 352         if (linkmode != -1) {
 353                 rta = aliasing_hide_typecast(
 354                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
 355                         struct rtattr);
 356                 rta->rta_type = IFLA_LINKMODE;
 357                 rta->rta_len = RTA_LENGTH(sizeof(char));
 358                 *((char *) RTA_DATA(rta)) = linkmode;
 359                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 360                         RTA_LENGTH(sizeof(char));
 361         }
 362         if (operstate != -1) {
 363                 rta = (struct rtattr *)
 364                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 365                 rta->rta_type = IFLA_OPERSTATE;
 366                 rta->rta_len = RTA_LENGTH(sizeof(char));
 367                 *((char *) RTA_DATA(rta)) = operstate;
 368                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 369                         RTA_LENGTH(sizeof(char));
 370         }
 371
 372         wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
 373                    linkmode, operstate);
 374
 375         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 376         if (ret < 0) {
 377                 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
 378                            " %s (assume operstate is not supported)",
 379                            strerror(errno));
 380         }
 381
 382         return ret < 0 ? -1 : 0;
 383 }
 384
 385
 386 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 387 {
 388         struct wpa_driver_nl80211_data *drv = priv;
 389         if (!drv->associated)
 390                 return -1;
 391         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 392         return 0;
 393 }
 394
 395
 396 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 397 {
 398         struct wpa_driver_nl80211_data *drv = priv;
 399         if (!drv->associated)
 400                 return -1;
 401         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 402         return drv->ssid_len;
 403 }
 404
 405
 406 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 407                                           void *ctx, char *buf, size_t len,
 408                                           int del)
 409 {
 410         union wpa_event_data event;
 411
 412         os_memset(&event, 0, sizeof(event));
 413         if (len > sizeof(event.interface_status.ifname))
 414                 len = sizeof(event.interface_status.ifname) - 1;
 415         os_memcpy(event.interface_status.ifname, buf, len);
 416         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 417                 EVENT_INTERFACE_ADDED;
 418
 419         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 420                    del ? "DEL" : "NEW",
 421                    event.interface_status.ifname,
 422                    del ? "removed" : "added");
 423
 424         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 425                 if (del)
 426                         drv->if_removed = 1;
 427                 else
 428                         drv->if_removed = 0;
 429         }
 430
 431         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 432 }
 433
 434
 435 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 436                                          struct nlmsghdr *h)
 437 {
 438         struct ifinfomsg *ifi;
 439         int attrlen, _nlmsg_len, rta_len;
 440         struct rtattr *attr;
 441
 442         ifi = NLMSG_DATA(h);
 443
 444         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 445
 446         attrlen = h->nlmsg_len - _nlmsg_len;
 447         if (attrlen < 0)
 448                 return 0;
 449
 450         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 451
 452         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 453         while (RTA_OK(attr, attrlen)) {
 454                 if (attr->rta_type == IFLA_IFNAME) {
 455                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 456                             == 0)
 457                                 return 1;
 458                         else
 459                                 break;
 460                 }
 461                 attr = RTA_NEXT(attr, attrlen);
 462         }
 463
 464         return 0;
 465 }
 466
 467
 468 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 469                                           int ifindex, struct nlmsghdr *h)
 470 {
 471         if (drv->ifindex == ifindex)
 472                 return 1;
 473
 474         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 475                 drv->ifindex = if_nametoindex(drv->ifname);
 476                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 477                            "interface");
 478                 wpa_driver_nl80211_finish_drv_init(drv);
 479                 return 1;
 480         }
 481
 482         return 0;
 483 }
 484
 485
 486 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 487                                               void *ctx, struct nlmsghdr *h,
 488                                               size_t len)
 489 {
 490         struct ifinfomsg *ifi;
 491         int attrlen, _nlmsg_len, rta_len;
 492         struct rtattr * attr;
 493
 494         if (len < sizeof(*ifi))
 495                 return;
 496
 497         ifi = NLMSG_DATA(h);
 498
 499         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 500                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 501                            ifi->ifi_index);
 502                 return;
 503         }
 504
 505         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 506                    "(%s%s%s%s)",
 507                    drv->operstate, ifi->ifi_flags,
 508                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 509                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 510                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 511                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 512         /*
 513          * Some drivers send the association event before the operup event--in
 514          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 515          * fails. This will hit us when wpa_supplicant does not need to do
 516          * IEEE 802.1X authentication
 517          */
 518         if (drv->operstate == 1 &&
 519             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 520             !(ifi->ifi_flags & IFF_RUNNING))
 521                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 522
 523         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 524
 525         attrlen = h->nlmsg_len - _nlmsg_len;
 526         if (attrlen < 0)
 527                 return;
 528
 529         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 530
 531         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 532         while (RTA_OK(attr, attrlen)) {
 533                 if (attr->rta_type == IFLA_IFNAME) {
 534                         wpa_driver_nl80211_event_link(
 535                                 drv, ctx,
 536                                 ((char *) attr) + rta_len,
 537                                 attr->rta_len - rta_len, 0);
 538                 }
 539                 attr = RTA_NEXT(attr, attrlen);
 540         }
 541 }
 542
 543
 544 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 545                                               void *ctx, struct nlmsghdr *h,
 546                                               size_t len)
 547 {
 548         struct ifinfomsg *ifi;
 549         int attrlen, _nlmsg_len, rta_len;
 550         struct rtattr * attr;
 551
 552         if (len < sizeof(*ifi))
 553                 return;
 554
 555         ifi = NLMSG_DATA(h);
 556
 557         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 558
 559         attrlen = h->nlmsg_len - _nlmsg_len;
 560         if (attrlen < 0)
 561                 return;
 562
 563         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 564
 565         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 566         while (RTA_OK(attr, attrlen)) {
 567                 if (attr->rta_type == IFLA_IFNAME) {
 568                         wpa_driver_nl80211_event_link(
 569                                 drv, ctx,
 570                                 ((char *) attr) + rta_len,
 571                                 attr->rta_len - rta_len, 1);
 572                 }
 573                 attr = RTA_NEXT(attr, attrlen);
 574         }
 575 }
 576
 577
 578 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 579                                                   void *sock_ctx)
 580 {
 581         char buf[8192];
 582         int left;
 583         struct sockaddr_nl from;
 584         socklen_t fromlen;
 585         struct nlmsghdr *h;
 586         int max_events = 10;
 587
 588 try_again:
 589         fromlen = sizeof(from);
 590         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 591                         (struct sockaddr *) &from, &fromlen);
 592         if (left < 0) {
 593                 if (errno != EINTR && errno != EAGAIN)
 594                         perror("recvfrom(netlink)");
 595                 return;
 596         }
 597
 598         h = (struct nlmsghdr *) buf;
 599         while (left >= (int) sizeof(*h)) {
 600                 int len, plen;
 601
 602                 len = h->nlmsg_len;
 603                 plen = len - sizeof(*h);
 604                 if (len > left || plen < 0) {
 605                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 606                                    "len=%d left=%d plen=%d",
 607                                    len, left, plen);
 608                         break;
 609                 }
 610
 611                 switch (h->nlmsg_type) {
 612                 case RTM_NEWLINK:
 613                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 614                                                           h, plen);
 615                         break;
 616                 case RTM_DELLINK:
 617                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 618                                                           h, plen);
 619                         break;
 620                 }
 621
 622                 len = NLMSG_ALIGN(len);
 623                 left -= len;
 624                 h = (struct nlmsghdr *) ((char *) h + len);
 625         }
 626
 627         if (left > 0) {
 628                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 629                            "message", left);
 630         }
 631
 632         if (--max_events > 0) {
 633                 /*
 634                  * Try to receive all events in one eloop call in order to
 635                  * limit race condition on cases where AssocInfo event, Assoc
 636                  * event, and EAPOL frames are received more or less at the
 637                  * same time. We want to process the event messages first
 638                  * before starting EAPOL processing.
 639                  */
 640                 goto try_again;
 641         }
 642 }
 643
 644
 645 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 646                             const u8 *frame, size_t len)
 647 {
 648         const struct ieee80211_mgmt *mgmt;
 649         union wpa_event_data event;
 650
 651         mgmt = (const struct ieee80211_mgmt *) frame;
 652         if (len < 24 + sizeof(mgmt->u.auth)) {
 653                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 654                            "frame");
 655                 return;
 656         }
 657
 658         os_memset(&event, 0, sizeof(event));
 659         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 660         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 661         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 662         if (len > 24 + sizeof(mgmt->u.auth)) {
 663                 event.auth.ies = mgmt->u.auth.variable;
 664                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 665         }
 666
 667         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 668 }
 669
 670
 671 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 672                             const u8 *frame, size_t len)
 673 {
 674         const struct ieee80211_mgmt *mgmt;
 675         union wpa_event_data event;
 676         u16 status;
 677
 678         mgmt = (const struct ieee80211_mgmt *) frame;
 679         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 680                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 681                            "frame");
 682                 return;
 683         }
 684
 685         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 686         if (status != WLAN_STATUS_SUCCESS) {
 687                 os_memset(&event, 0, sizeof(event));
 688                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 689                         event.assoc_reject.resp_ies =
 690                                 (u8 *) mgmt->u.assoc_resp.variable;
 691                         event.assoc_reject.resp_ies_len =
 692                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 693                 }
 694                 event.assoc_reject.status_code = status;
 695
 696                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 697                 return;
 698         }
 699
 700         drv->associated = 1;
 701         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 702
 703         os_memset(&event, 0, sizeof(event));
 704         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 705                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 706                 event.assoc_info.resp_ies_len =
 707                         len - 24 - sizeof(mgmt->u.assoc_resp);
 708         }
 709
 710         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 711 }
 712
 713 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 714                                enum nl80211_commands cmd, struct nlattr *status,
 715                                struct nlattr *addr, struct nlattr *req_ie,
 716                                struct nlattr *resp_ie)
 717 {
 718         union wpa_event_data event;
 719
 720         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 721                 /*
 722                  * Avoid reporting two association events that would confuse
 723                  * the core code.
 724                  */
 725                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 726                            "when using userspace SME", cmd);
 727                 return;
 728         }
 729
 730         os_memset(&event, 0, sizeof(event));
 731         if (cmd == NL80211_CMD_CONNECT &&
 732             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 733                 if (resp_ie) {
 734                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 735                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 736                 }
 737                 event.assoc_reject.status_code = nla_get_u16(status);
 738                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 739                 return;
 740         }
 741
 742         drv->associated = 1;
 743         if (addr)
 744                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 745
 746         if (req_ie) {
 747                 event.assoc_info.req_ies = nla_data(req_ie);
 748                 event.assoc_info.req_ies_len = nla_len(req_ie);
 749         }
 750         if (resp_ie) {
 751                 event.assoc_info.resp_ies = nla_data(resp_ie);
 752                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 753         }
 754
 755         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 756 }
 757
 758 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 759                                enum nl80211_commands cmd, struct nlattr *addr)
 760 {
 761         union wpa_event_data event;
 762         enum wpa_event_type ev;
 763
 764         if (nla_len(addr) != ETH_ALEN)
 765                 return;
 766
 767         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 768                    cmd, MAC2STR((u8 *) nla_data(addr)));
 769
 770         if (cmd == NL80211_CMD_AUTHENTICATE)
 771                 ev = EVENT_AUTH_TIMED_OUT;
 772         else if (cmd == NL80211_CMD_ASSOCIATE)
 773                 ev = EVENT_ASSOC_TIMED_OUT;
 774         else
 775                 return;
 776
 777         os_memset(&event, 0, sizeof(event));
 778         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 779         wpa_supplicant_event(drv->ctx, ev, &event);
 780 }
 781
 782
 783 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 784                        enum nl80211_commands cmd, struct nlattr *frame,
 785                        struct nlattr *addr, struct nlattr *timed_out)
 786 {
 787         if (timed_out && addr) {
 788                 mlme_timeout_event(drv, cmd, addr);
 789                 return;
 790         }
 791
 792         if (frame == NULL) {
 793                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 794                            "data", cmd);
 795                 return;
 796         }
 797
 798         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 799         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 800                     nla_data(frame), nla_len(frame));
 801
 802         switch (cmd) {
 803         case NL80211_CMD_AUTHENTICATE:
 804                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 805                 break;
 806         case NL80211_CMD_ASSOCIATE:
 807                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 808                 break;
 809         case NL80211_CMD_DEAUTHENTICATE:
 810                 drv->associated = 0;
 811                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 812                 break;
 813         case NL80211_CMD_DISASSOCIATE:
 814                 drv->associated = 0;
 815                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 816                 break;
 817         default:
 818                 break;
 819         }
 820 }
 821
 822 #endif /* HOSTAPD */
 823
 824
 825 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 826                                            struct nlattr *tb[])
 827 {
 828         union wpa_event_data data;
 829
 830         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 831         os_memset(&data, 0, sizeof(data));
 832         if (tb[NL80211_ATTR_MAC]) {
 833                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 834                             nla_data(tb[NL80211_ATTR_MAC]),
 835                             nla_len(tb[NL80211_ATTR_MAC]));
 836                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 837         }
 838         if (tb[NL80211_ATTR_KEY_SEQ]) {
 839                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 840                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 841                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 842         }
 843         if (tb[NL80211_ATTR_KEY_TYPE]) {
 844                 enum nl80211_key_type key_type =
 845                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 846                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 847                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 848                         data.michael_mic_failure.unicast = 1;
 849         } else
 850                 data.michael_mic_failure.unicast = 1;
 851
 852         if (tb[NL80211_ATTR_KEY_IDX]) {
 853                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 854                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 855         }
 856
 857         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 858 }
 859
 860
 861 static int process_event(struct nl_msg *msg, void *arg)
 862 {
 863         struct wpa_driver_nl80211_data *drv = arg;
 864         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 865         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 866
 867         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 868                   genlmsg_attrlen(gnlh, 0), NULL);
 869
 870         if (tb[NL80211_ATTR_IFINDEX]) {
 871                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 872                 if (ifindex != drv->ifindex) {
 873                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 874                                    " for foreign interface (ifindex %d)",
 875                                    gnlh->cmd, ifindex);
 876                         return NL_SKIP;
 877                 }
 878         }
 879
 880         if (drv->ap_scan_as_station &&
 881             (gnlh->cmd == NL80211_CMD_NEW_SCAN_RESULTS ||
 882              gnlh->cmd == NL80211_CMD_SCAN_ABORTED)) {
 883                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
 884                 drv->ap_scan_as_station = 0;
 885         }
 886
 887         switch (gnlh->cmd) {
 888         case NL80211_CMD_TRIGGER_SCAN:
 889                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger");
 890                 break;
 891         case NL80211_CMD_NEW_SCAN_RESULTS:
 892                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 893                 drv->scan_complete_events = 1;
 894                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 895                                      drv->ctx);
 896                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 897                 break;
 898         case NL80211_CMD_SCAN_ABORTED:
 899                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 900                 /*
 901                  * Need to indicate that scan results are available in order
 902                  * not to make wpa_supplicant stop its scanning.
 903                  */
 904                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 905                                      drv->ctx);
 906                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 907                 break;
 908 #ifndef HOSTAPD
 909         case NL80211_CMD_AUTHENTICATE:
 910         case NL80211_CMD_ASSOCIATE:
 911         case NL80211_CMD_DEAUTHENTICATE:
 912         case NL80211_CMD_DISASSOCIATE:
 913                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 914                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
 915                 break;
 916         case NL80211_CMD_CONNECT:
 917         case NL80211_CMD_ROAM:
 918                 mlme_event_connect(drv, gnlh->cmd,
 919                                    tb[NL80211_ATTR_STATUS_CODE],
 920                                    tb[NL80211_ATTR_MAC],
 921                                    tb[NL80211_ATTR_REQ_IE],
 922                                    tb[NL80211_ATTR_RESP_IE]);
 923                 break;
 924         case NL80211_CMD_DISCONNECT:
 925                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 926                         /*
 927                          * Avoid reporting two disassociation events that could
 928                          * confuse the core code.
 929                          */
 930                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 931                                    "event when using userspace SME");
 932                         break;
 933                 }
 934                 drv->associated = 0;
 935                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 936                 break;
 937 #endif /* HOSTAPD */
 938         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 939                 mlme_event_michael_mic_failure(drv, tb);
 940                 break;
 941         default:
 942                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 943                            "(cmd=%d)", gnlh->cmd);
 944                 break;
 945         }
 946
 947         return NL_SKIP;
 948 }
 949
 950
 951 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 952                                              void *sock_ctx)
 953 {
 954         struct nl_cb *cb;
 955         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 956
 957         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 958
 959         cb = nl_cb_clone(drv->nl_cb);
 960         if (!cb)
 961                 return;
 962         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 963         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 964         nl_recvmsgs(drv->nl_handle_event, cb);
 965         nl_cb_put(cb);
 966 }
 967
 968
 969 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 970                                    const char *ifname, int dev_up)
 971 {
 972         struct ifreq ifr;
 973
 974         if (drv->ioctl_sock < 0)
 975                 return -1;
 976
 977         os_memset(&ifr, 0, sizeof(ifr));
 978         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 979
 980         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 981                 perror("ioctl[SIOCGIFFLAGS]");
 982                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 983                            ifname);
 984                 return -1;
 985         }
 986
 987         if (dev_up) {
 988                 if (ifr.ifr_flags & IFF_UP)
 989                         return 0;
 990                 ifr.ifr_flags |= IFF_UP;
 991         } else {
 992                 if (!(ifr.ifr_flags & IFF_UP))
 993                         return 0;
 994                 ifr.ifr_flags &= ~IFF_UP;
 995         }
 996
 997         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 998                 perror("ioctl[SIOCSIFFLAGS]");
 999                 return -1;
1000         }
1001
1002         return 0;
1003 }
1004
1005
1006 /**
1007  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1008  * @priv: driver_nl80211 private data
1009  * @alpha2_arg: country to which to switch to
1010  * Returns: 0 on success, -1 on failure
1011  *
1012  * This asks nl80211 to set the regulatory domain for given
1013  * country ISO / IEC alpha2.
1014  */
1015 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1016 {
1017         struct wpa_driver_nl80211_data *drv = priv;
1018         char alpha2[3];
1019         struct nl_msg *msg;
1020
1021         msg = nlmsg_alloc();
1022         if (!msg)
1023                 return -ENOMEM;
1024
1025         alpha2[0] = alpha2_arg[0];
1026         alpha2[1] = alpha2_arg[1];
1027         alpha2[2] = '\0';
1028
1029         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1030                     0, NL80211_CMD_REQ_SET_REG, 0);
1031
1032         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1033         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1034                 return -EINVAL;
1035         return 0;
1036 nla_put_failure:
1037         return -EINVAL;
1038 }
1039
1040
1041 #ifndef HOSTAPD
1042 struct wiphy_info_data {
1043         int max_scan_ssids;
1044         int ap_supported;
1045         int auth_supported;
1046         int connect_supported;
1047 };
1048
1049
1050 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1051 {
1052         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1053         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1054         struct wiphy_info_data *info = arg;
1055
1056         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1057                   genlmsg_attrlen(gnlh, 0), NULL);
1058
1059         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1060                 info->max_scan_ssids =
1061                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1062
1063         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1064                 struct nlattr *nl_mode;
1065                 int i;
1066                 nla_for_each_nested(nl_mode,
1067                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1068                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1069                                 info->ap_supported = 1;
1070                                 break;
1071                         }
1072                 }
1073         }
1074
1075         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1076                 struct nlattr *nl_cmd;
1077                 int i;
1078
1079                 nla_for_each_nested(nl_cmd,
1080                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1081                         u32 cmd = nla_get_u32(nl_cmd);
1082                         if (cmd == NL80211_CMD_AUTHENTICATE)
1083                                 info->auth_supported = 1;
1084                         else if (cmd == NL80211_CMD_CONNECT)
1085                                 info->connect_supported = 1;
1086                 }
1087         }
1088
1089         return NL_SKIP;
1090 }
1091
1092
1093 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1094                                        struct wiphy_info_data *info)
1095 {
1096         struct nl_msg *msg;
1097
1098         os_memset(info, 0, sizeof(*info));
1099         msg = nlmsg_alloc();
1100         if (!msg)
1101                 return -1;
1102
1103         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1104                     0, NL80211_CMD_GET_WIPHY, 0);
1105
1106         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1107
1108         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1109                 return 0;
1110         msg = NULL;
1111 nla_put_failure:
1112         nlmsg_free(msg);
1113         return -1;
1114 }
1115
1116
1117 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1118 {
1119         struct wiphy_info_data info;
1120         if (wpa_driver_nl80211_get_info(drv, &info))
1121                 return -1;
1122         drv->has_capability = 1;
1123         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1124         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1125                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1126                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1127                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1128         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1129                 WPA_DRIVER_CAPA_ENC_WEP104 |
1130                 WPA_DRIVER_CAPA_ENC_TKIP |
1131                 WPA_DRIVER_CAPA_ENC_CCMP;
1132
1133         drv->capa.max_scan_ssids = info.max_scan_ssids;
1134         if (info.ap_supported)
1135                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1136
1137         if (info.auth_supported)
1138                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1139         else if (!info.connect_supported) {
1140                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1141                            "authentication/association or connect commands");
1142                 return -1;
1143         }
1144
1145         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1146
1147         return 0;
1148 }
1149 #endif /* HOSTAPD */
1150
1151
1152 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1153                                       void *ctx)
1154 {
1155         int ret;
1156
1157         /* Initialize generic netlink and nl80211 */
1158
1159         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1160         if (drv->nl_cb == NULL) {
1161                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1162                            "callbacks");
1163                 goto err1;
1164         }
1165
1166         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1167         if (drv->nl_handle == NULL) {
1168                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1169                            "callbacks");
1170                 goto err2;
1171         }
1172
1173         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1174         if (drv->nl_handle_event == NULL) {
1175                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1176                            "callbacks (event)");
1177                 goto err2b;
1178         }
1179
1180         if (genl_connect(drv->nl_handle)) {
1181                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1182                            "netlink");
1183                 goto err3;
1184         }
1185
1186         if (genl_connect(drv->nl_handle_event)) {
1187                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1188                            "netlink (event)");
1189                 goto err3;
1190         }
1191
1192 #ifdef CONFIG_LIBNL20
1193         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1194                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1195                            "netlink cache");
1196                 goto err3;
1197         }
1198         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1199             0) {
1200                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1201                            "netlink cache (event)");
1202                 goto err3b;
1203         }
1204 #else /* CONFIG_LIBNL20 */
1205         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1206         if (drv->nl_cache == NULL) {
1207                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1208                            "netlink cache");
1209                 goto err3;
1210         }
1211         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1212         if (drv->nl_cache_event == NULL) {
1213                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1214                            "netlink cache (event)");
1215                 goto err3b;
1216         }
1217 #endif /* CONFIG_LIBNL20 */
1218
1219         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1220         if (drv->nl80211 == NULL) {
1221                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1222                            "found");
1223                 goto err4;
1224         }
1225
1226         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1227         if (ret >= 0)
1228                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1229         if (ret < 0) {
1230                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1231                            "membership for scan events: %d (%s)",
1232                            ret, strerror(-ret));
1233                 goto err4;
1234         }
1235
1236         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1237         if (ret >= 0)
1238                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1239         if (ret < 0) {
1240                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1241                            "membership for mlme events: %d (%s)",
1242                            ret, strerror(-ret));
1243                 goto err4;
1244         }
1245
1246         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1247                                  wpa_driver_nl80211_event_receive, drv, ctx);
1248
1249         return 0;
1250
1251 err4:
1252         nl_cache_free(drv->nl_cache_event);
1253 err3b:
1254         nl_cache_free(drv->nl_cache);
1255 err3:
1256         nl_handle_destroy(drv->nl_handle_event);
1257 err2b:
1258         nl_handle_destroy(drv->nl_handle);
1259 err2:
1260         nl_cb_put(drv->nl_cb);
1261 err1:
1262         return -1;
1263 }
1264
1265
1266 static int wpa_driver_nl80211_init_link_events(
1267         struct wpa_driver_nl80211_data *drv)
1268 {
1269 #ifdef HOSTAPD
1270         return 0;
1271 #else /* HOSTAPD */
1272         int s;
1273         struct sockaddr_nl local;
1274
1275         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1276         if (s < 0) {
1277                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1278                 return -1;
1279         }
1280
1281         os_memset(&local, 0, sizeof(local));
1282         local.nl_family = AF_NETLINK;
1283         local.nl_groups = RTMGRP_LINK;
1284         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1285                 perror("bind(netlink)");
1286                 close(s);
1287                 return -1;
1288         }
1289
1290         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1291                                  drv->ctx);
1292         drv->link_event_sock = s;
1293
1294         return 0;
1295 #endif /* HOSTAPD */
1296 }
1297
1298
1299 /**
1300  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1301  * @ctx: context to be used when calling wpa_supplicant functions,
1302  * e.g., wpa_supplicant_event()
1303  * @ifname: interface name, e.g., wlan0
1304  * Returns: Pointer to private data, %NULL on failure
1305  */
1306 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1307 {
1308         struct wpa_driver_nl80211_data *drv;
1309
1310         drv = os_zalloc(sizeof(*drv));
1311         if (drv == NULL)
1312                 return NULL;
1313         drv->ctx = ctx;
1314         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1315         drv->monitor_ifidx = -1;
1316         drv->monitor_sock = -1;
1317         drv->link_event_sock = -1;
1318         drv->ioctl_sock = -1;
1319
1320         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1321                 os_free(drv);
1322                 return NULL;
1323         }
1324
1325         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1326         if (drv->ioctl_sock < 0) {
1327                 perror("socket(PF_INET,SOCK_DGRAM)");
1328                 goto failed;
1329         }
1330
1331         if (wpa_driver_nl80211_init_link_events(drv) ||
1332             wpa_driver_nl80211_finish_drv_init(drv))
1333                 goto failed;
1334
1335         return drv;
1336
1337 failed:
1338         if (drv->link_event_sock >= 0) {
1339                 eloop_unregister_read_sock(drv->link_event_sock);
1340                 close(drv->link_event_sock);
1341         }
1342         if (drv->ioctl_sock >= 0)
1343                 close(drv->ioctl_sock);
1344
1345         genl_family_put(drv->nl80211);
1346         nl_cache_free(drv->nl_cache);
1347         nl_handle_destroy(drv->nl_handle);
1348         nl_cb_put(drv->nl_cb);
1349
1350         os_free(drv);
1351         return NULL;
1352 }
1353
1354
1355 static int
1356 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1357 {
1358         drv->ifindex = if_nametoindex(drv->ifname);
1359
1360 #ifndef HOSTAPD
1361         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1362                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1363                            "use managed mode");
1364         }
1365
1366         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1367                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1368                            "UP", drv->ifname);
1369                 return -1;
1370         }
1371
1372         if (wpa_driver_nl80211_capa(drv))
1373                 return -1;
1374
1375         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1376 #endif /* HOSTAPD */
1377
1378         return 0;
1379 }
1380
1381
1382 #ifdef HOSTAPD
1383 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1384 {
1385         struct i802_bss *bss, *prev;
1386         bss = drv->bss.next;
1387         while (bss) {
1388                 prev = bss;
1389                 bss = bss->next;
1390                 os_free(bss);
1391         }
1392 }
1393 #endif /* HOSTAPD */
1394
1395
1396 #if defined(CONFIG_AP) || defined(HOSTAPD)
1397 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1398 {
1399         struct nl_msg *msg;
1400
1401         msg = nlmsg_alloc();
1402         if (!msg)
1403                 return -ENOMEM;
1404
1405         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1406                     0, NL80211_CMD_DEL_BEACON, 0);
1407         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1408
1409         return send_and_recv_msgs(drv, msg, NULL, NULL);
1410  nla_put_failure:
1411         return -ENOBUFS;
1412 }
1413 #endif /* CONFIG_AP || HOSTAPD */
1414
1415
1416 /**
1417  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1418  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1419  *
1420  * Shut down driver interface and processing of driver events. Free
1421  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1422  */
1423 static void wpa_driver_nl80211_deinit(void *priv)
1424 {
1425         struct wpa_driver_nl80211_data *drv = priv;
1426
1427 #if defined(CONFIG_AP) || defined(HOSTAPD)
1428         nl80211_remove_monitor_interface(drv);
1429         if (drv->monitor_sock >= 0) {
1430                 eloop_unregister_read_sock(drv->monitor_sock);
1431                 close(drv->monitor_sock);
1432         }
1433
1434         if (drv->nlmode == NL80211_IFTYPE_AP)
1435                 wpa_driver_nl80211_del_beacon(drv);
1436 #endif /* CONFIG_AP || HOSTAPD */
1437
1438 #ifdef HOSTAPD
1439         if (drv->last_freq_ht) {
1440                 /* Clear HT flags from the driver */
1441                 struct hostapd_freq_params freq;
1442                 os_memset(&freq, 0, sizeof(freq));
1443                 freq.freq = drv->last_freq;
1444                 i802_set_freq(priv, &freq);
1445         }
1446
1447         if (drv->eapol_sock >= 0) {
1448                 eloop_unregister_read_sock(drv->eapol_sock);
1449                 close(drv->eapol_sock);
1450         }
1451
1452         if (drv->if_indices != drv->default_if_indices)
1453                 os_free(drv->if_indices);
1454
1455         wpa_driver_nl80211_free_bss(drv);
1456 #else /* HOSTAPD */
1457
1458         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1459
1460         if (drv->link_event_sock >= 0) {
1461                 eloop_unregister_read_sock(drv->link_event_sock);
1462                 close(drv->link_event_sock);
1463         }
1464 #endif /* HOSTAPD */
1465
1466         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1467
1468         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1469         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1470
1471         if (drv->ioctl_sock >= 0)
1472                 close(drv->ioctl_sock);
1473
1474         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1475         genl_family_put(drv->nl80211);
1476         nl_cache_free(drv->nl_cache);
1477         nl_cache_free(drv->nl_cache_event);
1478         nl_handle_destroy(drv->nl_handle);
1479         nl_handle_destroy(drv->nl_handle_event);
1480         nl_cb_put(drv->nl_cb);
1481
1482         os_free(drv);
1483 }
1484
1485
1486 /**
1487  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1488  * @eloop_ctx: Driver private data
1489  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1490  *
1491  * This function can be used as registered timeout when starting a scan to
1492  * generate a scan completed event if the driver does not report this.
1493  */
1494 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1495 {
1496         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1497         if (drv->ap_scan_as_station) {
1498                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1499                 drv->ap_scan_as_station = 0;
1500         }
1501         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1502         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1503 }
1504
1505
1506 /**
1507  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1508  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1509  * @params: Scan parameters
1510  * Returns: 0 on success, -1 on failure
1511  */
1512 static int wpa_driver_nl80211_scan(void *priv,
1513                                    struct wpa_driver_scan_params *params)
1514 {
1515         struct wpa_driver_nl80211_data *drv = priv;
1516         int ret = 0, timeout;
1517         struct nl_msg *msg, *ssids, *freqs;
1518         size_t i;
1519
1520         msg = nlmsg_alloc();
1521         ssids = nlmsg_alloc();
1522         freqs = nlmsg_alloc();
1523         if (!msg || !ssids || !freqs) {
1524                 nlmsg_free(msg);
1525                 nlmsg_free(ssids);
1526                 nlmsg_free(freqs);
1527                 return -1;
1528         }
1529
1530         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1531                     NL80211_CMD_TRIGGER_SCAN, 0);
1532
1533         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1534
1535         for (i = 0; i < params->num_ssids; i++) {
1536                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1537                         params->ssids[i].ssid);
1538         }
1539         if (params->num_ssids)
1540                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1541
1542         if (params->extra_ies) {
1543                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1544                         params->extra_ies);
1545         }
1546
1547         if (params->freqs) {
1548                 for (i = 0; params->freqs[i]; i++)
1549                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1550                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1551         }
1552
1553         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1554         msg = NULL;
1555         if (ret) {
1556                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1557                            "(%s)", ret, strerror(-ret));
1558 #ifdef HOSTAPD
1559                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1560                         /*
1561                          * mac80211 does not allow scan requests in AP mode, so
1562                          * try to do this in station mode.
1563                          */
1564                         if (wpa_driver_nl80211_set_mode(drv,
1565                                                         IEEE80211_MODE_INFRA))
1566                                 goto nla_put_failure;
1567
1568                         if (wpa_driver_nl80211_scan(drv, params)) {
1569                                 wpa_driver_nl80211_set_mode(drv,
1570                                                             IEEE80211_MODE_AP);
1571                                 goto nla_put_failure;
1572                         }
1573
1574                         /* Restore AP mode when processing scan results */
1575                         drv->ap_scan_as_station = 1;
1576                         ret = 0;
1577                 } else
1578                         goto nla_put_failure;
1579 #else /* HOSTAPD */
1580                 goto nla_put_failure;
1581 #endif /* HOSTAPD */
1582         }
1583
1584         /* Not all drivers generate "scan completed" wireless event, so try to
1585          * read results after a timeout. */
1586         timeout = 10;
1587         if (drv->scan_complete_events) {
1588                 /*
1589                  * The driver seems to deliver events to notify when scan is
1590                  * complete, so use longer timeout to avoid race conditions
1591                  * with scanning and following association request.
1592                  */
1593                 timeout = 30;
1594         }
1595         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1596                    "seconds", ret, timeout);
1597         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1598         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1599                                drv, drv->ctx);
1600
1601 nla_put_failure:
1602         nlmsg_free(ssids);
1603         nlmsg_free(msg);
1604         nlmsg_free(freqs);
1605         return ret;
1606 }
1607
1608
1609 static int bss_info_handler(struct nl_msg *msg, void *arg)
1610 {
1611         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1612         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1613         struct nlattr *bss[NL80211_BSS_MAX + 1];
1614         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1615                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1616                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1617                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1618                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1619                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1620                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1621                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1622                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1623                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1624         };
1625         struct wpa_scan_results *res = arg;
1626         struct wpa_scan_res **tmp;
1627         struct wpa_scan_res *r;
1628         const u8 *ie;
1629         size_t ie_len;
1630
1631         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1632                   genlmsg_attrlen(gnlh, 0), NULL);
1633         if (!tb[NL80211_ATTR_BSS])
1634                 return NL_SKIP;
1635         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1636                              bss_policy))
1637                 return NL_SKIP;
1638         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1639                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1640                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1641         } else {
1642                 ie = NULL;
1643                 ie_len = 0;
1644         }
1645
1646         r = os_zalloc(sizeof(*r) + ie_len);
1647         if (r == NULL)
1648                 return NL_SKIP;
1649         if (bss[NL80211_BSS_BSSID])
1650                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1651                           ETH_ALEN);
1652         if (bss[NL80211_BSS_FREQUENCY])
1653                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1654         if (bss[NL80211_BSS_BEACON_INTERVAL])
1655                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1656         if (bss[NL80211_BSS_CAPABILITY])
1657                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1658         r->flags |= WPA_SCAN_NOISE_INVALID;
1659         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1660                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1661                 r->level /= 100; /* mBm to dBm */
1662                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1663         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1664                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1665                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1666         } else
1667                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1668         if (bss[NL80211_BSS_TSF])
1669                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1670         if (bss[NL80211_BSS_SEEN_MS_AGO])
1671                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1672         r->ie_len = ie_len;
1673         if (ie)
1674                 os_memcpy(r + 1, ie, ie_len);
1675
1676         tmp = os_realloc(res->res,
1677                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1678         if (tmp == NULL) {
1679                 os_free(r);
1680                 return NL_SKIP;
1681         }
1682         tmp[res->num++] = r;
1683         res->res = tmp;
1684
1685         return NL_SKIP;
1686 }
1687
1688
1689 /**
1690  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1691  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1692  * Returns: Scan results on success, -1 on failure
1693  */
1694 static struct wpa_scan_results *
1695 wpa_driver_nl80211_get_scan_results(void *priv)
1696 {
1697         struct wpa_driver_nl80211_data *drv = priv;
1698         struct nl_msg *msg;
1699         struct wpa_scan_results *res;
1700         int ret;
1701
1702         res = os_zalloc(sizeof(*res));
1703         if (res == NULL)
1704                 return 0;
1705         msg = nlmsg_alloc();
1706         if (!msg)
1707                 goto nla_put_failure;
1708
1709         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1710                     NL80211_CMD_GET_SCAN, 0);
1711         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1712
1713         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1714         msg = NULL;
1715         if (ret == 0) {
1716                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1717                            (unsigned long) res->num);
1718                 return res;
1719         }
1720         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1721                    "(%s)", ret, strerror(-ret));
1722 nla_put_failure:
1723         nlmsg_free(msg);
1724         wpa_scan_results_free(res);
1725         return NULL;
1726 }
1727
1728
1729 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
1730                        wpa_alg alg, const u8 *addr, int key_idx, int set_tx,
1731                        const u8 *seq, size_t seq_len,
1732                        const u8 *key, size_t key_len)
1733 {
1734         struct nl_msg *msg;
1735         int ret;
1736
1737         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1738                    "set_tx=%d seq_len=%lu key_len=%lu",
1739                    __func__, ifindex, alg, addr, key_idx, set_tx,
1740                    (unsigned long) seq_len, (unsigned long) key_len);
1741
1742         msg = nlmsg_alloc();
1743         if (!msg)
1744                 return -ENOMEM;
1745
1746         if (alg == WPA_ALG_NONE) {
1747                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1748                             0, NL80211_CMD_DEL_KEY, 0);
1749         } else {
1750                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1751                             0, NL80211_CMD_NEW_KEY, 0);
1752                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1753                 switch (alg) {
1754                 case WPA_ALG_WEP:
1755                         if (key_len == 5)
1756                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1757                                             WLAN_CIPHER_SUITE_WEP40);
1758                         else
1759                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1760                                             WLAN_CIPHER_SUITE_WEP104);
1761                         break;
1762                 case WPA_ALG_TKIP:
1763                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1764                                     WLAN_CIPHER_SUITE_TKIP);
1765                         break;
1766                 case WPA_ALG_CCMP:
1767                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1768                                     WLAN_CIPHER_SUITE_CCMP);
1769                         break;
1770                 case WPA_ALG_IGTK:
1771                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1772                                     WLAN_CIPHER_SUITE_AES_CMAC);
1773                         break;
1774                 default:
1775                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1776                                    "algorithm %d", __func__, alg);
1777                         nlmsg_free(msg);
1778                         return -1;
1779                 }
1780         }
1781
1782         if (seq && seq_len)
1783                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1784
1785         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1786         {
1787                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1788                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1789         }
1790         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1791         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1792
1793         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1794         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1795                 ret = 0;
1796         if (ret)
1797                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1798                            ret, strerror(-ret));
1799
1800         /*
1801          * If we failed or don't need to set the default TX key (below),
1802          * we're done here.
1803          */
1804         if (ret || !set_tx || alg == WPA_ALG_NONE)
1805                 return ret;
1806 #ifdef HOSTAPD /* FIX: is this needed? */
1807         if (addr)
1808                 return ret;
1809 #endif /* HOSTAPD */
1810
1811         msg = nlmsg_alloc();
1812         if (!msg)
1813                 return -ENOMEM;
1814
1815         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1816                     0, NL80211_CMD_SET_KEY, 0);
1817         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1818         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1819         if (alg == WPA_ALG_IGTK)
1820                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1821         else
1822                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1823
1824         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1825         if (ret == -ENOENT)
1826                 ret = 0;
1827         if (ret)
1828                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1829                            "err=%d %s)", ret, strerror(-ret));
1830         return ret;
1831
1832 nla_put_failure:
1833         return -ENOBUFS;
1834 }
1835
1836
1837 #ifndef HOSTAPD
1838 static int nl_add_key(struct nl_msg *msg, wpa_alg alg,
1839                       int key_idx, int defkey,
1840                       const u8 *seq, size_t seq_len,
1841                       const u8 *key, size_t key_len)
1842 {
1843         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1844         if (!key_attr)
1845                 return -1;
1846
1847         if (defkey && alg == WPA_ALG_IGTK)
1848                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1849         else if (defkey)
1850                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1851
1852         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1853
1854         switch (alg) {
1855         case WPA_ALG_WEP:
1856                 if (key_len == 5)
1857                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1858                                     WLAN_CIPHER_SUITE_WEP40);
1859                 else
1860                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1861                                     WLAN_CIPHER_SUITE_WEP104);
1862                 break;
1863         case WPA_ALG_TKIP:
1864                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1865                 break;
1866         case WPA_ALG_CCMP:
1867                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1868                 break;
1869         case WPA_ALG_IGTK:
1870                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1871                             WLAN_CIPHER_SUITE_AES_CMAC);
1872                 break;
1873         default:
1874                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1875                            "algorithm %d", __func__, alg);
1876                 return -1;
1877         }
1878
1879         if (seq && seq_len)
1880                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1881
1882         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1883
1884         nla_nest_end(msg, key_attr);
1885
1886         return 0;
1887  nla_put_failure:
1888         return -1;
1889 }
1890
1891
1892 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1893                                  struct nl_msg *msg)
1894 {
1895         int i, privacy = 0;
1896         struct nlattr *nl_keys, *nl_key;
1897
1898         for (i = 0; i < 4; i++) {
1899                 if (!params->wep_key[i])
1900                         continue;
1901                 privacy = 1;
1902                 break;
1903         }
1904         if (!privacy)
1905                 return 0;
1906
1907         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1908
1909         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1910         if (!nl_keys)
1911                 goto nla_put_failure;
1912
1913         for (i = 0; i < 4; i++) {
1914                 if (!params->wep_key[i])
1915                         continue;
1916
1917                 nl_key = nla_nest_start(msg, i);
1918                 if (!nl_key)
1919                         goto nla_put_failure;
1920
1921                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1922                         params->wep_key[i]);
1923                 if (params->wep_key_len[i] == 5)
1924                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1925                                     WLAN_CIPHER_SUITE_WEP40);
1926                 else
1927                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1928                                     WLAN_CIPHER_SUITE_WEP104);
1929
1930                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
1931
1932                 if (i == params->wep_tx_keyidx)
1933                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1934
1935                 nla_nest_end(msg, nl_key);
1936         }
1937         nla_nest_end(msg, nl_keys);
1938
1939         return 0;
1940
1941 nla_put_failure:
1942         return -ENOBUFS;
1943 }
1944
1945
1946 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1947                                       const u8 *addr, int key_idx,
1948                                       int set_tx, const u8 *seq,
1949                                       size_t seq_len,
1950                                       const u8 *key, size_t key_len)
1951 {
1952         struct wpa_driver_nl80211_data *drv = priv;
1953         return nl_set_encr(drv->ifindex, drv, alg, addr, key_idx, set_tx, seq,
1954                            seq_len, key, key_len);
1955 }
1956
1957
1958 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1959                                    const u8 *addr, int cmd, u16 reason_code)
1960 {
1961         int ret = -1;
1962         struct nl_msg *msg;
1963
1964         msg = nlmsg_alloc();
1965         if (!msg)
1966                 return -1;
1967
1968         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1969
1970         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1971         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1972         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1973
1974         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1975         msg = NULL;
1976         if (ret) {
1977                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1978                            "(%s)", ret, strerror(-ret));
1979                 goto nla_put_failure;
1980         }
1981         ret = 0;
1982
1983 nla_put_failure:
1984         nlmsg_free(msg);
1985         return ret;
1986 }
1987
1988
1989 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
1990                                          const u8 *addr, int reason_code)
1991 {
1992         wpa_printf(MSG_DEBUG, "%s", __func__);
1993         drv->associated = 0;
1994         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
1995                                        reason_code);
1996 }
1997
1998
1999 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2000                                              int reason_code)
2001 {
2002         struct wpa_driver_nl80211_data *drv = priv;
2003         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2004                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2005         wpa_printf(MSG_DEBUG, "%s", __func__);
2006         drv->associated = 0;
2007         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2008                                        reason_code);
2009 }
2010
2011
2012 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2013                                            int reason_code)
2014 {
2015         struct wpa_driver_nl80211_data *drv = priv;
2016         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2017                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2018         wpa_printf(MSG_DEBUG, "%s", __func__);
2019         drv->associated = 0;
2020         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2021                                        reason_code);
2022 }
2023
2024
2025 static int wpa_driver_nl80211_authenticate(
2026         void *priv, struct wpa_driver_auth_params *params)
2027 {
2028         struct wpa_driver_nl80211_data *drv = priv;
2029         int ret = -1, i;
2030         struct nl_msg *msg;
2031         enum nl80211_auth_type type;
2032         int count = 0;
2033
2034         drv->associated = 0;
2035
2036 retry:
2037         msg = nlmsg_alloc();
2038         if (!msg)
2039                 return -1;
2040
2041         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2042                    drv->ifindex);
2043
2044         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2045                     NL80211_CMD_AUTHENTICATE, 0);
2046
2047         for (i = 0; i < 4; i++) {
2048                 if (!params->wep_key[i])
2049                         continue;
2050                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
2051                                            i == params->wep_tx_keyidx, NULL, 0,
2052                                            params->wep_key[i],
2053                                            params->wep_key_len[i]);
2054                 if (params->wep_tx_keyidx != i)
2055                         continue;
2056                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2057                                params->wep_key[i], params->wep_key_len[i])) {
2058                         nlmsg_free(msg);
2059                         return -1;
2060                 }
2061         }
2062
2063         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2064         if (params->bssid) {
2065                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2066                            MAC2STR(params->bssid));
2067                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2068         }
2069         if (params->freq) {
2070                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2071                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2072         }
2073         if (params->ssid) {
2074                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2075                                   params->ssid, params->ssid_len);
2076                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2077                         params->ssid);
2078         }
2079         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2080         if (params->ie)
2081                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2082         /*
2083          * TODO: if multiple auth_alg options enabled, try them one by one if
2084          * the AP rejects authentication due to unknown auth alg
2085          */
2086         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2087                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2088         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2089                 type = NL80211_AUTHTYPE_SHARED_KEY;
2090         else if (params->auth_alg & AUTH_ALG_LEAP)
2091                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2092         else if (params->auth_alg & AUTH_ALG_FT)
2093                 type = NL80211_AUTHTYPE_FT;
2094         else
2095                 goto nla_put_failure;
2096         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2097         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2098
2099         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2100         msg = NULL;
2101         if (ret) {
2102                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2103                            "(%s)", ret, strerror(-ret));
2104                 count++;
2105                 if (ret == -EALREADY && count == 1 && params->bssid) {
2106                         /*
2107                          * mac80211 does not currently accept new
2108                          * authentication if we are already authenticated. As a
2109                          * workaround, force deauthentication and try again.
2110                          */
2111                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2112                                    "after forced deauthentication");
2113                         wpa_driver_nl80211_deauthenticate(
2114                                 drv, params->bssid,
2115                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2116                         nlmsg_free(msg);
2117                         goto retry;
2118                 }
2119                 goto nla_put_failure;
2120         }
2121         ret = 0;
2122         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2123                    "successfully");
2124
2125 nla_put_failure:
2126         nlmsg_free(msg);
2127         return ret;
2128 }
2129
2130 #endif /* HOSTAPD */
2131
2132
2133 #if defined(CONFIG_AP) || defined(HOSTAPD)
2134
2135 struct phy_info_arg {
2136         u16 *num_modes;
2137         struct hostapd_hw_modes *modes;
2138 };
2139
2140 static int phy_info_handler(struct nl_msg *msg, void *arg)
2141 {
2142         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2143         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2144         struct phy_info_arg *phy_info = arg;
2145
2146         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2147
2148         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2149         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2150                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2151                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2152                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2153                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2154                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2155                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2156         };
2157
2158         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2159         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2160                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2161                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2162         };
2163
2164         struct nlattr *nl_band;
2165         struct nlattr *nl_freq;
2166         struct nlattr *nl_rate;
2167         int rem_band, rem_freq, rem_rate;
2168         struct hostapd_hw_modes *mode;
2169         int idx, mode_is_set;
2170
2171         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2172                   genlmsg_attrlen(gnlh, 0), NULL);
2173
2174         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2175                 return NL_SKIP;
2176
2177         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2178                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2179                 if (!mode)
2180                         return NL_SKIP;
2181                 phy_info->modes = mode;
2182
2183                 mode_is_set = 0;
2184
2185                 mode = &phy_info->modes[*(phy_info->num_modes)];
2186                 memset(mode, 0, sizeof(*mode));
2187                 *(phy_info->num_modes) += 1;
2188
2189                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2190                           nla_len(nl_band), NULL);
2191
2192                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2193                         mode->ht_capab = nla_get_u16(
2194                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2195                 }
2196
2197                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2198                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2199                         u8 *mcs;
2200                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2201                         os_memcpy(mode->mcs_set, mcs, 16);
2202                 }
2203
2204                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2205                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2206                                   nla_len(nl_freq), freq_policy);
2207                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2208                                 continue;
2209                         mode->num_channels++;
2210                 }
2211
2212                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
2213                 if (!mode->channels)
2214                         return NL_SKIP;
2215
2216                 idx = 0;
2217
2218                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2219                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2220                                   nla_len(nl_freq), freq_policy);
2221                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2222                                 continue;
2223
2224                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2225                         mode->channels[idx].flag = 0;
2226
2227                         if (!mode_is_set) {
2228                                 /* crude heuristic */
2229                                 if (mode->channels[idx].freq < 4000)
2230                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2231                                 else
2232                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2233                                 mode_is_set = 1;
2234                         }
2235
2236                         /* crude heuristic */
2237                         if (mode->channels[idx].freq < 4000)
2238                                 if (mode->channels[idx].freq == 2484)
2239                                         mode->channels[idx].chan = 14;
2240                                 else
2241                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2242                         else
2243                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2244
2245                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2246                                 mode->channels[idx].flag |=
2247                                         HOSTAPD_CHAN_DISABLED;
2248                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2249                                 mode->channels[idx].flag |=
2250                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2251                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2252                                 mode->channels[idx].flag |=
2253                                         HOSTAPD_CHAN_NO_IBSS;
2254                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2255                                 mode->channels[idx].flag |=
2256                                         HOSTAPD_CHAN_RADAR;
2257
2258                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2259                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2260                                 mode->channels[idx].max_tx_power =
2261                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2262
2263                         idx++;
2264                 }
2265
2266                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2267                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2268                                   nla_len(nl_rate), rate_policy);
2269                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2270                                 continue;
2271                         mode->num_rates++;
2272                 }
2273
2274                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
2275                 if (!mode->rates)
2276                         return NL_SKIP;
2277
2278                 idx = 0;
2279
2280                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2281                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2282                                   nla_len(nl_rate), rate_policy);
2283                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2284                                 continue;
2285                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2286
2287                         /* crude heuristic */
2288                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2289                             mode->rates[idx].rate > 200)
2290                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2291
2292                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
2293                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
2294
2295                         idx++;
2296                 }
2297         }
2298
2299         return NL_SKIP;
2300 }
2301
2302 static struct hostapd_hw_modes *
2303 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2304 {
2305         u16 m;
2306         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2307         int i, mode11g_idx = -1;
2308
2309         /* If only 802.11g mode is included, use it to construct matching
2310          * 802.11b mode data. */
2311
2312         for (m = 0; m < *num_modes; m++) {
2313                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2314                         return modes; /* 802.11b already included */
2315                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2316                         mode11g_idx = m;
2317         }
2318
2319         if (mode11g_idx < 0)
2320                 return modes; /* 2.4 GHz band not supported at all */
2321
2322         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2323         if (nmodes == NULL)
2324                 return modes; /* Could not add 802.11b mode */
2325
2326         mode = &nmodes[*num_modes];
2327         os_memset(mode, 0, sizeof(*mode));
2328         (*num_modes)++;
2329         modes = nmodes;
2330
2331         mode->mode = HOSTAPD_MODE_IEEE80211B;
2332
2333         mode11g = &modes[mode11g_idx];
2334         mode->num_channels = mode11g->num_channels;
2335         mode->channels = os_malloc(mode11g->num_channels *
2336                                    sizeof(struct hostapd_channel_data));
2337         if (mode->channels == NULL) {
2338                 (*num_modes)--;
2339                 return modes; /* Could not add 802.11b mode */
2340         }
2341         os_memcpy(mode->channels, mode11g->channels,
2342                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2343
2344         mode->num_rates = 0;
2345         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
2346         if (mode->rates == NULL) {
2347                 os_free(mode->channels);
2348                 (*num_modes)--;
2349                 return modes; /* Could not add 802.11b mode */
2350         }
2351
2352         for (i = 0; i < mode11g->num_rates; i++) {
2353                 if (mode11g->rates[i].rate > 110 ||
2354                     mode11g->rates[i].flags &
2355                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
2356                         continue;
2357                 mode->rates[mode->num_rates] = mode11g->rates[i];
2358                 mode->num_rates++;
2359                 if (mode->num_rates == 4)
2360                         break;
2361         }
2362
2363         if (mode->num_rates == 0) {
2364                 os_free(mode->channels);
2365                 os_free(mode->rates);
2366                 (*num_modes)--;
2367                 return modes; /* No 802.11b rates */
2368         }
2369
2370         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2371                    "information");
2372
2373         return modes;
2374 }
2375
2376
2377 static struct hostapd_hw_modes *
2378 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2379 {
2380         struct wpa_driver_nl80211_data *drv = priv;
2381         struct nl_msg *msg;
2382         struct phy_info_arg result = {
2383                 .num_modes = num_modes,
2384                 .modes = NULL,
2385         };
2386
2387         *num_modes = 0;
2388         *flags = 0;
2389
2390         msg = nlmsg_alloc();
2391         if (!msg)
2392                 return NULL;
2393
2394         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2395                     0, NL80211_CMD_GET_WIPHY, 0);
2396
2397         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2398
2399         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2400                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2401  nla_put_failure:
2402         return NULL;
2403 }
2404
2405
2406 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2407                                          const void *data, size_t len,
2408                                          int encrypt)
2409 {
2410         __u8 rtap_hdr[] = {
2411                 0x00, 0x00, /* radiotap version */
2412                 0x0e, 0x00, /* radiotap length */
2413                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2414                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2415                 0x00,       /* padding */
2416                 0x00, 0x00, /* RX and TX flags to indicate that */
2417                 0x00, 0x00, /* this is the injected frame directly */
2418         };
2419         struct iovec iov[2] = {
2420                 {
2421                         .iov_base = &rtap_hdr,
2422                         .iov_len = sizeof(rtap_hdr),
2423                 },
2424                 {
2425                         .iov_base = (void *) data,
2426                         .iov_len = len,
2427                 }
2428         };
2429         struct msghdr msg = {
2430                 .msg_name = NULL,
2431                 .msg_namelen = 0,
2432                 .msg_iov = iov,
2433                 .msg_iovlen = 2,
2434                 .msg_control = NULL,
2435                 .msg_controllen = 0,
2436                 .msg_flags = 0,
2437         };
2438
2439         if (encrypt)
2440                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2441
2442         return sendmsg(drv->monitor_sock, &msg, 0);
2443 }
2444
2445
2446 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2447                                         size_t data_len)
2448 {
2449         struct wpa_driver_nl80211_data *drv = priv;
2450         struct ieee80211_mgmt *mgmt;
2451         int encrypt = 1;
2452         u16 fc;
2453
2454         mgmt = (struct ieee80211_mgmt *) data;
2455         fc = le_to_host16(mgmt->frame_control);
2456
2457         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2458             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2459                 /*
2460                  * Only one of the authentication frame types is encrypted.
2461                  * In order for static WEP encryption to work properly (i.e.,
2462                  * to not encrypt the frame), we need to tell mac80211 about
2463                  * the frames that must not be encrypted.
2464                  */
2465                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2466                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2467                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2468                         encrypt = 0;
2469         }
2470
2471         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2472 }
2473
2474 #endif /* CONFIG_AP || HOSTAPD */
2475
2476
2477 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2478                                          const u8 *head, size_t head_len,
2479                                          const u8 *tail, size_t tail_len,
2480                                          int dtim_period, int beacon_int)
2481 {
2482         struct wpa_driver_nl80211_data *drv = priv;
2483         struct nl_msg *msg;
2484         u8 cmd = NL80211_CMD_NEW_BEACON;
2485         int ret;
2486         int beacon_set;
2487         int ifindex = if_nametoindex(ifname);
2488 #ifdef HOSTAPD
2489         struct i802_bss *bss;
2490
2491         bss = get_bss(drv, ifindex);
2492         if (bss == NULL)
2493                 return -ENOENT;
2494         beacon_set = bss->beacon_set;
2495 #else /* HOSTAPD */
2496         beacon_set = drv->beacon_set;
2497 #endif /* HOSTAPD */
2498
2499         msg = nlmsg_alloc();
2500         if (!msg)
2501                 return -ENOMEM;
2502
2503         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2504                    beacon_set);
2505         if (beacon_set)
2506                 cmd = NL80211_CMD_SET_BEACON;
2507
2508         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2509                     0, cmd, 0);
2510         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2511         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2512         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2513         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2514         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2515
2516         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2517         if (ret) {
2518                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2519                            ret, strerror(-ret));
2520         } else {
2521 #ifdef HOSTAPD
2522                 bss->beacon_set = 1;
2523 #else /* HOSTAPD */
2524                 drv->beacon_set = 1;
2525 #endif /* HOSTAPD */
2526         }
2527         return ret;
2528  nla_put_failure:
2529         return -ENOBUFS;
2530 }
2531
2532
2533 #if defined(CONFIG_AP) || defined(HOSTAPD)
2534
2535 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2536                                        int freq, int ht_enabled,
2537                                        int sec_channel_offset)
2538 {
2539         struct nl_msg *msg;
2540         int ret;
2541
2542         msg = nlmsg_alloc();
2543         if (!msg)
2544                 return -1;
2545
2546         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2547                     NL80211_CMD_SET_WIPHY, 0);
2548
2549         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2550         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2551         if (ht_enabled) {
2552                 switch (sec_channel_offset) {
2553                 case -1:
2554                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2555                                     NL80211_CHAN_HT40MINUS);
2556                         break;
2557                 case 1:
2558                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2559                                     NL80211_CHAN_HT40PLUS);
2560                         break;
2561                 default:
2562                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2563                                     NL80211_CHAN_HT20);
2564                         break;
2565                 }
2566         }
2567
2568         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2569         if (ret == 0)
2570                 return 0;
2571         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2572                    "%d (%s)", freq, ret, strerror(-ret));
2573 nla_put_failure:
2574         return -1;
2575 }
2576
2577
2578 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2579                                       struct hostapd_sta_add_params *params)
2580 {
2581         struct wpa_driver_nl80211_data *drv = priv;
2582         struct nl_msg *msg;
2583         int ret = -ENOBUFS;
2584
2585         msg = nlmsg_alloc();
2586         if (!msg)
2587                 return -ENOMEM;
2588
2589         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2590                     0, NL80211_CMD_NEW_STATION, 0);
2591
2592         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2593         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2594         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2595         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2596                 params->supp_rates);
2597         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2598                     params->listen_interval);
2599
2600 #ifdef CONFIG_IEEE80211N
2601         if (params->ht_capabilities) {
2602                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2603                         params->ht_capabilities->length,
2604                         &params->ht_capabilities->data);
2605         }
2606 #endif /* CONFIG_IEEE80211N */
2607
2608         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2609         if (ret)
2610                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2611                            "result: %d (%s)", ret, strerror(-ret));
2612         if (ret == -EEXIST)
2613                 ret = 0;
2614  nla_put_failure:
2615         return ret;
2616 }
2617
2618
2619 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2620 {
2621         struct wpa_driver_nl80211_data *drv = priv;
2622         struct nl_msg *msg;
2623         int ret;
2624
2625         msg = nlmsg_alloc();
2626         if (!msg)
2627                 return -ENOMEM;
2628
2629         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2630                     0, NL80211_CMD_DEL_STATION, 0);
2631
2632         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2633                     if_nametoindex(drv->ifname));
2634         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2635
2636         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2637         if (ret == -ENOENT)
2638                 return 0;
2639         return ret;
2640  nla_put_failure:
2641         return -ENOBUFS;
2642 }
2643
2644
2645 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2646                                  int ifidx)
2647 {
2648         struct nl_msg *msg;
2649
2650 #ifdef HOSTAPD
2651         /* stop listening for EAPOL on this interface */
2652         del_ifidx(drv, ifidx);
2653 #endif /* HOSTAPD */
2654
2655         msg = nlmsg_alloc();
2656         if (!msg)
2657                 goto nla_put_failure;
2658
2659         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2660                     0, NL80211_CMD_DEL_INTERFACE, 0);
2661         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2662
2663         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2664                 return;
2665  nla_put_failure:
2666         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2667                    ifidx);
2668 }
2669
2670
2671 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2672                                      const char *ifname,
2673                                      enum nl80211_iftype iftype,
2674                                      const u8 *addr)
2675 {
2676         struct nl_msg *msg, *flags = NULL;
2677         int ifidx;
2678         int ret = -ENOBUFS;
2679
2680         msg = nlmsg_alloc();
2681         if (!msg)
2682                 return -1;
2683
2684         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2685                     0, NL80211_CMD_NEW_INTERFACE, 0);
2686         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2687         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2688         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2689
2690         if (iftype == NL80211_IFTYPE_MONITOR) {
2691                 int err;
2692
2693                 flags = nlmsg_alloc();
2694                 if (!flags)
2695                         goto nla_put_failure;
2696
2697                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2698
2699                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2700
2701                 nlmsg_free(flags);
2702
2703                 if (err)
2704                         goto nla_put_failure;
2705         }
2706
2707         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2708         if (ret) {
2709  nla_put_failure:
2710                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2711                            ifname, ret, strerror(-ret));
2712                 return ret;
2713         }
2714
2715         ifidx = if_nametoindex(ifname);
2716
2717         if (ifidx <= 0)
2718                 return -1;
2719
2720 #ifdef HOSTAPD
2721         /* start listening for EAPOL on this interface */
2722         add_ifidx(drv, ifidx);
2723
2724         if (addr && iftype == NL80211_IFTYPE_AP &&
2725             set_ifhwaddr(drv, ifname, addr)) {
2726                 nl80211_remove_iface(drv, ifidx);
2727                 return -1;
2728         }
2729 #endif /* HOSTAPD */
2730
2731         return ifidx;
2732 }
2733 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2734                                 const char *ifname, enum nl80211_iftype iftype,
2735                                 const u8 *addr)
2736 {
2737         int ret;
2738
2739         ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2740
2741         /* if error occured and interface exists already */
2742         if (ret == -ENFILE && if_nametoindex(ifname)) {
2743                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2744
2745                 /* Try to remove the interface that was already there. */
2746                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2747
2748                 /* Try to create the interface again */
2749                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2750         }
2751
2752         return ret;
2753 }
2754
2755 #endif /* CONFIG_AP || HOSTAPD */
2756
2757 #ifdef CONFIG_AP
2758
2759 void ap_tx_status(void *ctx, const u8 *addr,
2760                   const u8 *buf, size_t len, int ack);
2761 void ap_rx_from_unknown_sta(void *ctx, struct ieee80211_hdr *hdr, size_t len);
2762 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2763                 struct hostapd_frame_info *fi);
2764 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2765
2766 #endif /* CONFIG_AP */
2767
2768 #if defined(CONFIG_AP) || defined(HOSTAPD)
2769
2770 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2771 {
2772         struct ieee80211_hdr *hdr;
2773         u16 fc, type, stype;
2774
2775         hdr = (struct ieee80211_hdr *) buf;
2776         fc = le_to_host16(hdr->frame_control);
2777
2778         type = WLAN_FC_GET_TYPE(fc);
2779         stype = WLAN_FC_GET_STYPE(fc);
2780
2781         switch (type) {
2782         case WLAN_FC_TYPE_MGMT:
2783                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2784                            ok ? "ACK" : "fail");
2785 #ifdef HOSTAPD
2786                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2787 #else /* HOSTAPD */
2788                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2789 #endif /* HOSTAPD */
2790                 break;
2791         case WLAN_FC_TYPE_CTRL:
2792                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2793                            ok ? "ACK" : "fail");
2794                 break;
2795         case WLAN_FC_TYPE_DATA:
2796 #ifdef HOSTAPD
2797                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2798 #else /* HOSTAPD */
2799                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2800 #endif /* HOSTAPD */
2801                 break;
2802         default:
2803                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2804                            type);
2805                 break;
2806         }
2807 }
2808
2809
2810 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2811                              struct ieee80211_hdr *hdr, size_t len)
2812 {
2813 #ifdef HOSTAPD
2814         hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2815 #else /* HOSTAPD */
2816         ap_rx_from_unknown_sta(drv->ctx, hdr, len);
2817 #endif /* HOSTAPD */
2818 }
2819
2820
2821 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2822                          u8 *buf, size_t len,
2823                          struct hostapd_frame_info *hfi)
2824 {
2825         struct ieee80211_hdr *hdr;
2826         u16 fc, stype;
2827
2828         hdr = (struct ieee80211_hdr *) buf;
2829         fc = le_to_host16(hdr->frame_control);
2830         stype = WLAN_FC_GET_STYPE(fc);
2831
2832         switch (WLAN_FC_GET_TYPE(fc)) {
2833         case WLAN_FC_TYPE_MGMT:
2834                 if (stype != WLAN_FC_STYPE_BEACON &&
2835                     stype != WLAN_FC_STYPE_PROBE_REQ)
2836                         wpa_printf(MSG_MSGDUMP, "MGMT");
2837 #ifdef HOSTAPD
2838                 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2839 #else /* HOSTAPD */
2840                 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2841 #endif /* HOSTAPD */
2842                 break;
2843         case WLAN_FC_TYPE_CTRL:
2844                 /* can only get here with PS-Poll frames */
2845                 wpa_printf(MSG_DEBUG, "CTRL");
2846                 from_unknown_sta(drv, hdr, len);
2847                 break;
2848         case WLAN_FC_TYPE_DATA:
2849                 from_unknown_sta(drv, hdr, len);
2850                 break;
2851         }
2852 }
2853
2854
2855 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2856 {
2857         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2858         int len;
2859         unsigned char buf[3000];
2860         struct ieee80211_radiotap_iterator iter;
2861         int ret;
2862         struct hostapd_frame_info hfi;
2863         int injected = 0, failed = 0, rxflags = 0;
2864
2865         len = recv(sock, buf, sizeof(buf), 0);
2866         if (len < 0) {
2867                 perror("recv");
2868                 return;
2869         }
2870
2871         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2872                 printf("received invalid radiotap frame\n");
2873                 return;
2874         }
2875
2876         memset(&hfi, 0, sizeof(hfi));
2877
2878         while (1) {
2879                 ret = ieee80211_radiotap_iterator_next(&iter);
2880                 if (ret == -ENOENT)
2881                         break;
2882                 if (ret) {
2883                         printf("received invalid radiotap frame (%d)\n", ret);
2884                         return;
2885                 }
2886                 switch (iter.this_arg_index) {
2887                 case IEEE80211_RADIOTAP_FLAGS:
2888                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2889                                 len -= 4;
2890                         break;
2891                 case IEEE80211_RADIOTAP_RX_FLAGS:
2892                         rxflags = 1;
2893                         break;
2894                 case IEEE80211_RADIOTAP_TX_FLAGS:
2895                         injected = 1;
2896                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2897                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2898                         break;
2899                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2900                         break;
2901                 case IEEE80211_RADIOTAP_CHANNEL:
2902                         /* TODO convert from freq/flags to channel number
2903                         hfi.channel = XXX;
2904                         hfi.phytype = XXX;
2905                          */
2906                         break;
2907                 case IEEE80211_RADIOTAP_RATE:
2908                         hfi.datarate = *iter.this_arg * 5;
2909                         break;
2910                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2911                         hfi.ssi_signal = *iter.this_arg;
2912                         break;
2913                 }
2914         }
2915
2916         if (rxflags && injected)
2917                 return;
2918
2919         if (!injected)
2920                 handle_frame(drv, buf + iter.max_length,
2921                              len - iter.max_length, &hfi);
2922         else
2923                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2924                                    len - iter.max_length, !failed);
2925 }
2926
2927
2928 /*
2929  * we post-process the filter code later and rewrite
2930  * this to the offset to the last instruction
2931  */
2932 #define PASS    0xFF
2933 #define FAIL    0xFE
2934
2935 static struct sock_filter msock_filter_insns[] = {
2936         /*
2937          * do a little-endian load of the radiotap length field
2938          */
2939         /* load lower byte into A */
2940         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2941         /* put it into X (== index register) */
2942         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2943         /* load upper byte into A */
2944         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2945         /* left-shift it by 8 */
2946         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2947         /* or with X */
2948         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2949         /* put result into X */
2950         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2951
2952         /*
2953          * Allow management frames through, this also gives us those
2954          * management frames that we sent ourselves with status
2955          */
2956         /* load the lower byte of the IEEE 802.11 frame control field */
2957         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2958         /* mask off frame type and version */
2959         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2960         /* accept frame if it's both 0, fall through otherwise */
2961         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2962
2963         /*
2964          * TODO: add a bit to radiotap RX flags that indicates
2965          * that the sending station is not associated, then
2966          * add a filter here that filters on our DA and that flag
2967          * to allow us to deauth frames to that bad station.
2968          *
2969          * Not a regression -- we didn't do it before either.
2970          */
2971
2972 #if 0
2973         /*
2974          * drop non-data frames, WDS frames
2975          */
2976         /* load the lower byte of the frame control field */
2977         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2978         /* mask off QoS bit */
2979         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2980         /* drop non-data frames */
2981         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2982         /* load the upper byte of the frame control field */
2983         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2984         /* mask off toDS/fromDS */
2985         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2986         /* drop WDS frames */
2987         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2988 #endif
2989
2990         /*
2991          * add header length to index
2992          */
2993         /* load the lower byte of the frame control field */
2994         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2995         /* mask off QoS bit */
2996         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2997         /* right shift it by 6 to give 0 or 2 */
2998         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2999         /* add data frame header length */
3000         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3001         /* add index, was start of 802.11 header */
3002         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3003         /* move to index, now start of LL header */
3004         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3005
3006         /*
3007          * Accept empty data frames, we use those for
3008          * polling activity.
3009          */
3010         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3011         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3012
3013         /*
3014          * Accept EAPOL frames
3015          */
3016         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3017         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3018         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3019         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3020
3021         /* keep these last two statements or change the code below */
3022         /* return 0 == "DROP" */
3023         BPF_STMT(BPF_RET | BPF_K, 0),
3024         /* return ~0 == "keep all" */
3025         BPF_STMT(BPF_RET | BPF_K, ~0),
3026 };
3027
3028 static struct sock_fprog msock_filter = {
3029         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3030         .filter = msock_filter_insns,
3031 };
3032
3033
3034 static int add_monitor_filter(int s)
3035 {
3036         int idx;
3037
3038         /* rewrite all PASS/FAIL jump offsets */
3039         for (idx = 0; idx < msock_filter.len; idx++) {
3040                 struct sock_filter *insn = &msock_filter_insns[idx];
3041
3042                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3043                         if (insn->code == (BPF_JMP|BPF_JA)) {
3044                                 if (insn->k == PASS)
3045                                         insn->k = msock_filter.len - idx - 2;
3046                                 else if (insn->k == FAIL)
3047                                         insn->k = msock_filter.len - idx - 3;
3048                         }
3049
3050                         if (insn->jt == PASS)
3051                                 insn->jt = msock_filter.len - idx - 2;
3052                         else if (insn->jt == FAIL)
3053                                 insn->jt = msock_filter.len - idx - 3;
3054
3055                         if (insn->jf == PASS)
3056                                 insn->jf = msock_filter.len - idx - 2;
3057                         else if (insn->jf == FAIL)
3058                                 insn->jf = msock_filter.len - idx - 3;
3059                 }
3060         }
3061
3062         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3063                        &msock_filter, sizeof(msock_filter))) {
3064                 perror("SO_ATTACH_FILTER");
3065                 return -1;
3066         }
3067
3068         return 0;
3069 }
3070
3071
3072 static void nl80211_remove_monitor_interface(
3073         struct wpa_driver_nl80211_data *drv)
3074 {
3075         if (drv->monitor_ifidx >= 0) {
3076                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3077                 drv->monitor_ifidx = -1;
3078         }
3079 }
3080
3081
3082 static int
3083 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3084 {
3085         char buf[IFNAMSIZ];
3086         struct sockaddr_ll ll;
3087         int optval;
3088         socklen_t optlen;
3089
3090         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3091         buf[IFNAMSIZ - 1] = '\0';
3092
3093         drv->monitor_ifidx =
3094                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
3095
3096         if (drv->monitor_ifidx < 0)
3097                 return -1;
3098
3099         if (hostapd_set_iface_flags(drv, buf, 1))
3100                 goto error;
3101
3102         memset(&ll, 0, sizeof(ll));
3103         ll.sll_family = AF_PACKET;
3104         ll.sll_ifindex = drv->monitor_ifidx;
3105         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3106         if (drv->monitor_sock < 0) {
3107                 perror("socket[PF_PACKET,SOCK_RAW]");
3108                 goto error;
3109         }
3110
3111         if (add_monitor_filter(drv->monitor_sock)) {
3112                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3113                            "interface; do filtering in user space");
3114                 /* This works, but will cost in performance. */
3115         }
3116
3117         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3118                 perror("monitor socket bind");
3119                 goto error;
3120         }
3121
3122         optlen = sizeof(optval);
3123         optval = 20;
3124         if (setsockopt
3125             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3126                 perror("Failed to set socket priority");
3127                 goto error;
3128         }
3129
3130         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3131                                      drv, NULL)) {
3132                 printf("Could not register monitor read socket\n");
3133                 goto error;
3134         }
3135
3136         return 0;
3137  error:
3138         nl80211_remove_monitor_interface(drv);
3139         return -1;
3140 }
3141
3142
3143 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3144
3145 static int wpa_driver_nl80211_hapd_send_eapol(
3146         void *priv, const u8 *addr, const u8 *data,
3147         size_t data_len, int encrypt, const u8 *own_addr)
3148 {
3149         struct wpa_driver_nl80211_data *drv = priv;
3150         struct ieee80211_hdr *hdr;
3151         size_t len;
3152         u8 *pos;
3153         int res;
3154 #if 0 /* FIX */
3155         int qos = sta->flags & WLAN_STA_WME;
3156 #else
3157         int qos = 0;
3158 #endif
3159
3160         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3161                 data_len;
3162         hdr = os_zalloc(len);
3163         if (hdr == NULL) {
3164                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3165                        (unsigned long) len);
3166                 return -1;
3167         }
3168
3169         hdr->frame_control =
3170                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3171         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3172         if (encrypt)
3173                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3174 #if 0 /* To be enabled if qos determination is added above */
3175         if (qos) {
3176                 hdr->frame_control |=
3177                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3178         }
3179 #endif
3180
3181         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3182         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3183         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3184         pos = (u8 *) (hdr + 1);
3185
3186 #if 0 /* To be enabled if qos determination is added above */
3187         if (qos) {
3188                 /* add an empty QoS header if needed */
3189                 pos[0] = 0;
3190                 pos[1] = 0;
3191                 pos += 2;
3192         }
3193 #endif
3194
3195         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3196         pos += sizeof(rfc1042_header);
3197         WPA_PUT_BE16(pos, ETH_P_PAE);
3198         pos += 2;
3199         memcpy(pos, data, data_len);
3200
3201         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3202         if (res < 0) {
3203                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3204                            "failed: %d (%s)",
3205                            (unsigned long) len, errno, strerror(errno));
3206         }
3207         free(hdr);
3208
3209         return res;
3210 }
3211
3212
3213 static u32 sta_flags_nl80211(int flags)
3214 {
3215         u32 f = 0;
3216
3217         if (flags & WLAN_STA_AUTHORIZED)
3218                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3219         if (flags & WLAN_STA_WMM)
3220                 f |= BIT(NL80211_STA_FLAG_WME);
3221         if (flags & WLAN_STA_SHORT_PREAMBLE)
3222                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3223         if (flags & WLAN_STA_MFP)
3224                 f |= BIT(NL80211_STA_FLAG_MFP);
3225
3226         return f;
3227 }
3228
3229
3230 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3231                                             int total_flags, int flags_or,
3232                                             int flags_and)
3233 {
3234         struct wpa_driver_nl80211_data *drv = priv;
3235         struct nl_msg *msg, *flags = NULL;
3236         struct nl80211_sta_flag_update upd;
3237
3238         msg = nlmsg_alloc();
3239         if (!msg)
3240                 return -ENOMEM;
3241
3242         flags = nlmsg_alloc();
3243         if (!flags) {
3244                 nlmsg_free(msg);
3245                 return -ENOMEM;
3246         }
3247
3248         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3249                     0, NL80211_CMD_SET_STATION, 0);
3250
3251         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3252                     if_nametoindex(drv->ifname));
3253         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3254
3255         /*
3256          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3257          * can be removed eventually.
3258          */
3259         if (total_flags & WLAN_STA_AUTHORIZED)
3260                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3261
3262         if (total_flags & WLAN_STA_WMM)
3263                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3264
3265         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3266                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3267
3268         if (total_flags & WLAN_STA_MFP)
3269                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3270
3271         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3272                 goto nla_put_failure;
3273
3274         os_memset(&upd, 0, sizeof(upd));
3275         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3276         upd.set = sta_flags_nl80211(flags_or);
3277         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3278
3279         nlmsg_free(flags);
3280
3281         return send_and_recv_msgs(drv, msg, NULL, NULL);
3282  nla_put_failure:
3283         nlmsg_free(flags);
3284         return -ENOBUFS;
3285 }
3286
3287 #endif /* CONFIG_AP || HOSTAPD */
3288
3289 #ifdef CONFIG_AP
3290
3291 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3292                                  struct wpa_driver_associate_params *params)
3293 {
3294         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3295             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3296                 nl80211_remove_monitor_interface(drv);
3297                 return -1;
3298         }
3299
3300         /* TODO: setup monitor interface (and add code somewhere to remove this
3301          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3302
3303         return 0;
3304 }
3305 #endif /* CONFIG_AP */
3306
3307
3308 #ifndef HOSTAPD
3309 static int wpa_driver_nl80211_connect(
3310         struct wpa_driver_nl80211_data *drv,
3311         struct wpa_driver_associate_params *params)
3312 {
3313         struct nl_msg *msg;
3314         enum nl80211_auth_type type;
3315         int ret = 0;
3316
3317         msg = nlmsg_alloc();
3318         if (!msg)
3319                 return -1;
3320
3321         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3322         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3323                     NL80211_CMD_CONNECT, 0);
3324
3325         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3326         if (params->bssid) {
3327                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3328                            MAC2STR(params->bssid));
3329                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3330         }
3331         if (params->freq) {
3332                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3333                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3334         }
3335         if (params->ssid) {
3336                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3337                                   params->ssid, params->ssid_len);
3338                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3339                         params->ssid);
3340                 if (params->ssid_len > sizeof(drv->ssid))
3341                         goto nla_put_failure;
3342                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3343                 drv->ssid_len = params->ssid_len;
3344         }
3345         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3346         if (params->wpa_ie)
3347                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3348                         params->wpa_ie);
3349
3350         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3351                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3352         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3353                 type = NL80211_AUTHTYPE_SHARED_KEY;
3354         else if (params->auth_alg & AUTH_ALG_LEAP)
3355                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3356         else if (params->auth_alg & AUTH_ALG_FT)
3357                 type = NL80211_AUTHTYPE_FT;
3358         else
3359                 goto nla_put_failure;
3360
3361         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3362         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3363
3364         if (params->wpa_ie && params->wpa_ie_len) {
3365                 enum nl80211_wpa_versions ver;
3366
3367                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3368                         ver = NL80211_WPA_VERSION_2;
3369                 else
3370                         ver = NL80211_WPA_VERSION_1;
3371
3372                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3373                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3374         }
3375
3376         if (params->pairwise_suite != CIPHER_NONE) {
3377                 int cipher = IW_AUTH_CIPHER_NONE;
3378
3379                 switch (params->pairwise_suite) {
3380                 case CIPHER_WEP40:
3381                         cipher = WLAN_CIPHER_SUITE_WEP40;
3382                         break;
3383                 case CIPHER_WEP104:
3384                         cipher = WLAN_CIPHER_SUITE_WEP104;
3385                         break;
3386                 case CIPHER_CCMP:
3387                         cipher = WLAN_CIPHER_SUITE_CCMP;
3388                         break;
3389                 case CIPHER_TKIP:
3390                 default:
3391                         cipher = WLAN_CIPHER_SUITE_TKIP;
3392                         break;
3393                 }
3394                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3395         }
3396
3397         if (params->group_suite != CIPHER_NONE) {
3398                 int cipher = IW_AUTH_CIPHER_NONE;
3399
3400                 switch (params->group_suite) {
3401                 case CIPHER_WEP40:
3402                         cipher = WLAN_CIPHER_SUITE_WEP40;
3403                         break;
3404                 case CIPHER_WEP104:
3405                         cipher = WLAN_CIPHER_SUITE_WEP104;
3406                         break;
3407                 case CIPHER_CCMP:
3408                         cipher = WLAN_CIPHER_SUITE_CCMP;
3409                         break;
3410                 case CIPHER_TKIP:
3411                 default:
3412                         cipher = WLAN_CIPHER_SUITE_TKIP;
3413                         break;
3414                 }
3415                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3416         }
3417
3418         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3419             params->key_mgmt_suite == KEY_MGMT_PSK) {
3420                 int mgmt = WLAN_AKM_SUITE_PSK;
3421
3422                 switch (params->key_mgmt_suite) {
3423                 case KEY_MGMT_802_1X:
3424                         mgmt = WLAN_AKM_SUITE_8021X;
3425                         break;
3426                 case KEY_MGMT_PSK:
3427                 default:
3428                         mgmt = WLAN_AKM_SUITE_PSK;
3429                         break;
3430                 }
3431                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3432         }
3433
3434         ret = nl80211_set_conn_keys(params, msg);
3435         if (ret)
3436                 goto nla_put_failure;
3437
3438         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3439         msg = NULL;
3440         if (ret) {
3441                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3442                            "(%s)", ret, strerror(-ret));
3443                 goto nla_put_failure;
3444         }
3445         ret = 0;
3446         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3447
3448 nla_put_failure:
3449         nlmsg_free(msg);
3450         return ret;
3451
3452 }
3453
3454
3455 static int wpa_driver_nl80211_associate(
3456         void *priv, struct wpa_driver_associate_params *params)
3457 {
3458         struct wpa_driver_nl80211_data *drv = priv;
3459         int ret = -1;
3460         struct nl_msg *msg;
3461
3462 #ifdef CONFIG_AP
3463         if (params->mode == 2)
3464                 return wpa_driver_nl80211_ap(drv, params);
3465 #endif /* CONFIG_AP */
3466
3467         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
3468                 return wpa_driver_nl80211_connect(drv, params);
3469
3470         drv->associated = 0;
3471
3472         msg = nlmsg_alloc();
3473         if (!msg)
3474                 return -1;
3475
3476         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3477                    drv->ifindex);
3478         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3479                     NL80211_CMD_ASSOCIATE, 0);
3480
3481         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3482         if (params->bssid) {
3483                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3484                            MAC2STR(params->bssid));
3485                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3486         }
3487         if (params->freq) {
3488                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3489                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3490         }
3491         if (params->ssid) {
3492                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3493                                   params->ssid, params->ssid_len);
3494                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3495                         params->ssid);
3496                 if (params->ssid_len > sizeof(drv->ssid))
3497                         goto nla_put_failure;
3498                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3499                 drv->ssid_len = params->ssid_len;
3500         }
3501         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3502         if (params->wpa_ie)
3503                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3504                         params->wpa_ie);
3505
3506 #ifdef CONFIG_IEEE80211W
3507         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3508                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3509 #endif /* CONFIG_IEEE80211W */
3510
3511         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3512
3513         if (params->prev_bssid) {
3514                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3515                            MAC2STR(params->prev_bssid));
3516                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3517                         params->prev_bssid);
3518         }
3519
3520         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3521         msg = NULL;
3522         if (ret) {
3523                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3524                            "(%s)", ret, strerror(-ret));
3525                 goto nla_put_failure;
3526         }
3527         ret = 0;
3528         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3529                    "successfully");
3530
3531 nla_put_failure:
3532         nlmsg_free(msg);
3533         return ret;
3534 }
3535 #endif /* HOSTAPD */
3536
3537
3538 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3539                             int ifindex, int mode)
3540 {
3541         struct nl_msg *msg;
3542         int ret = -ENOBUFS;
3543
3544         msg = nlmsg_alloc();
3545         if (!msg)
3546                 return -ENOMEM;
3547
3548         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3549                     0, NL80211_CMD_SET_INTERFACE, 0);
3550         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3551         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3552
3553         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3554         if (!ret)
3555                 return 0;
3556 nla_put_failure:
3557         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3558                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3559         return ret;
3560 }
3561
3562
3563 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3564 {
3565         struct wpa_driver_nl80211_data *drv = priv;
3566         int ret = -1;
3567         int nlmode;
3568
3569         switch (mode) {
3570         case 0:
3571                 nlmode = NL80211_IFTYPE_STATION;
3572                 break;
3573         case 1:
3574                 nlmode = NL80211_IFTYPE_ADHOC;
3575                 break;
3576         case 2:
3577                 nlmode = NL80211_IFTYPE_AP;
3578                 break;
3579         default:
3580                 return -1;
3581         }
3582
3583         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3584                 drv->nlmode = nlmode;
3585                 ret = 0;
3586                 goto done;
3587         }
3588
3589         if (nlmode == drv->nlmode) {
3590                 ret = 0;
3591                 goto done; /* Already in the requested mode */
3592         }
3593
3594         /* mac80211 doesn't allow mode changes while the device is up, so
3595          * take the device down, try to set the mode again, and bring the
3596          * device back up.
3597          */
3598         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3599                 /* Try to set the mode again while the interface is down */
3600                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3601                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3602                         ret = -1;
3603         }
3604
3605         if (!ret)
3606                 drv->nlmode = nlmode;
3607
3608 done:
3609 #if defined(CONFIG_AP) || defined(HOSTAPD)
3610         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3611                 /* Setup additional AP mode functionality if needed */
3612                 if (drv->monitor_ifidx < 0 &&
3613                     nl80211_create_monitor_interface(drv))
3614                         return -1;
3615         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3616                 /* Remove additional AP mode functionality */
3617                 nl80211_remove_monitor_interface(drv);
3618         }
3619 #endif /* CONFIG_AP || HOSTAPD */
3620
3621         return ret;
3622 }
3623
3624
3625 #ifndef HOSTAPD
3626
3627 static int wpa_driver_nl80211_get_capa(void *priv,
3628                                        struct wpa_driver_capa *capa)
3629 {
3630         struct wpa_driver_nl80211_data *drv = priv;
3631         if (!drv->has_capability)
3632                 return -1;
3633         os_memcpy(capa, &drv->capa, sizeof(*capa));
3634         return 0;
3635 }
3636
3637
3638 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3639 {
3640         struct wpa_driver_nl80211_data *drv = priv;
3641
3642         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3643                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3644         drv->operstate = state;
3645         return wpa_driver_nl80211_send_oper_ifla(
3646                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3647 }
3648
3649
3650 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3651 {
3652         struct wpa_driver_nl80211_data *drv = priv;
3653         struct nl_msg *msg;
3654         struct nl80211_sta_flag_update upd;
3655
3656         msg = nlmsg_alloc();
3657         if (!msg)
3658                 return -ENOMEM;
3659
3660         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3661                     0, NL80211_CMD_SET_STATION, 0);
3662
3663         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3664                     if_nametoindex(drv->ifname));
3665         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3666
3667         os_memset(&upd, 0, sizeof(upd));
3668         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3669         if (authorized)
3670                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3671         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3672
3673         return send_and_recv_msgs(drv, msg, NULL, NULL);
3674  nla_put_failure:
3675         return -ENOBUFS;
3676 }
3677
3678 #endif /* HOSTAPD */
3679
3680
3681 #ifdef HOSTAPD
3682
3683 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3684                                  int ifindex)
3685 {
3686         struct i802_bss *bss = &drv->bss;
3687         while (bss) {
3688                 if (ifindex == bss->ifindex)
3689                         return bss;
3690                 bss = bss->next;
3691         }
3692         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3693         return NULL;
3694 }
3695
3696
3697 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3698 {
3699         int i;
3700         int *old;
3701
3702         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3703                    ifidx);
3704         for (i = 0; i < drv->num_if_indices; i++) {
3705                 if (drv->if_indices[i] == 0) {
3706                         drv->if_indices[i] = ifidx;
3707                         return;
3708                 }
3709         }
3710
3711         if (drv->if_indices != drv->default_if_indices)
3712                 old = drv->if_indices;
3713         else
3714                 old = NULL;
3715
3716         drv->if_indices = realloc(old,
3717                                   sizeof(int) * (drv->num_if_indices + 1));
3718         if (!drv->if_indices) {
3719                 if (!old)
3720                         drv->if_indices = drv->default_if_indices;
3721                 else
3722                         drv->if_indices = old;
3723                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3724                            "interfaces");
3725                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3726                 return;
3727         }
3728         drv->if_indices[drv->num_if_indices] = ifidx;
3729         drv->num_if_indices++;
3730 }
3731
3732
3733 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3734 {
3735         int i;
3736
3737         for (i = 0; i < drv->num_if_indices; i++) {
3738                 if (drv->if_indices[i] == ifidx) {
3739                         drv->if_indices[i] = 0;
3740                         break;
3741                 }
3742         }
3743 }
3744
3745
3746 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3747 {
3748         int i;
3749
3750         for (i = 0; i < drv->num_if_indices; i++)
3751                 if (drv->if_indices[i] == ifidx)
3752                         return 1;
3753
3754         return 0;
3755 }
3756
3757
3758 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
3759                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
3760                         size_t seq_len, const u8 *key, size_t key_len)
3761 {
3762         struct wpa_driver_nl80211_data *drv = priv;
3763         return nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx,
3764                            set_tx, seq, seq_len, key, key_len);
3765 }
3766
3767
3768 static inline int min_int(int a, int b)
3769 {
3770         if (a < b)
3771                 return a;
3772         return b;
3773 }
3774
3775
3776 static int get_key_handler(struct nl_msg *msg, void *arg)
3777 {
3778         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3779         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3780
3781         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3782                   genlmsg_attrlen(gnlh, 0), NULL);
3783
3784         /*
3785          * TODO: validate the key index and mac address!
3786          * Otherwise, there's a race condition as soon as
3787          * the kernel starts sending key notifications.
3788          */
3789
3790         if (tb[NL80211_ATTR_KEY_SEQ])
3791                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3792                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3793         return NL_SKIP;
3794 }
3795
3796
3797 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3798                            int idx, u8 *seq)
3799 {
3800         struct wpa_driver_nl80211_data *drv = priv;
3801         struct nl_msg *msg;
3802
3803         msg = nlmsg_alloc();
3804         if (!msg)
3805                 return -ENOMEM;
3806
3807         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3808                     0, NL80211_CMD_GET_KEY, 0);
3809
3810         if (addr)
3811                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3812         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3813         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3814
3815         memset(seq, 0, 6);
3816
3817         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3818  nla_put_failure:
3819         return -ENOBUFS;
3820 }
3821
3822
3823 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3824                               int mode)
3825 {
3826         struct wpa_driver_nl80211_data *drv = priv;
3827         struct nl_msg *msg;
3828         u8 rates[NL80211_MAX_SUPP_RATES];
3829         u8 rates_len = 0;
3830         int i;
3831
3832         msg = nlmsg_alloc();
3833         if (!msg)
3834                 return -ENOMEM;
3835
3836         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3837                     NL80211_CMD_SET_BSS, 0);
3838
3839         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3840                 rates[rates_len++] = basic_rates[i] / 5;
3841
3842         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3843
3844         /* TODO: multi-BSS support */
3845         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3846
3847         return send_and_recv_msgs(drv, msg, NULL, NULL);
3848  nla_put_failure:
3849         return -ENOBUFS;
3850 }
3851
3852
3853 /* Set kernel driver on given frequency (MHz) */
3854 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3855 {
3856         struct wpa_driver_nl80211_data *drv = priv;
3857         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
3858                                            freq->sec_channel_offset);
3859 }
3860
3861
3862 static int i802_set_rts(void *priv, int rts)
3863 {
3864         struct wpa_driver_nl80211_data *drv = priv;
3865         struct nl_msg *msg;
3866         int ret = -ENOBUFS;
3867         u32 val;
3868
3869         msg = nlmsg_alloc();
3870         if (!msg)
3871                 return -ENOMEM;
3872
3873         if (rts >= 2347)
3874                 val = (u32) -1;
3875         else
3876                 val = rts;
3877
3878         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3879                     0, NL80211_CMD_SET_WIPHY, 0);
3880         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3881         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
3882
3883         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3884         if (!ret)
3885                 return 0;
3886 nla_put_failure:
3887         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
3888                    "%d (%s)", rts, ret, strerror(-ret));
3889         return ret;
3890 }
3891
3892
3893 static int i802_set_frag(void *priv, int frag)
3894 {
3895         struct wpa_driver_nl80211_data *drv = priv;
3896         struct nl_msg *msg;
3897         int ret = -ENOBUFS;
3898         u32 val;
3899
3900         msg = nlmsg_alloc();
3901         if (!msg)
3902                 return -ENOMEM;
3903
3904         if (frag >= 2346)
3905                 val = (u32) -1;
3906         else
3907                 val = frag;
3908
3909         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3910                     0, NL80211_CMD_SET_WIPHY, 0);
3911         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3912         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
3913
3914         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3915         if (!ret)
3916                 return 0;
3917 nla_put_failure:
3918         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
3919                    "%d: %d (%s)", frag, ret, strerror(-ret));
3920         return ret;
3921 }
3922
3923
3924 static int i802_flush(void *priv)
3925 {
3926         struct wpa_driver_nl80211_data *drv = priv;
3927         struct nl_msg *msg;
3928
3929         msg = nlmsg_alloc();
3930         if (!msg)
3931                 return -1;
3932
3933         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3934                     0, NL80211_CMD_DEL_STATION, 0);
3935
3936         /*
3937          * XXX: FIX! this needs to flush all VLANs too
3938          */
3939         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3940                     if_nametoindex(drv->ifname));
3941
3942         return send_and_recv_msgs(drv, msg, NULL, NULL);
3943  nla_put_failure:
3944         return -ENOBUFS;
3945 }
3946
3947
3948 static int get_sta_handler(struct nl_msg *msg, void *arg)
3949 {
3950         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3951         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3952         struct hostap_sta_driver_data *data = arg;
3953         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3954         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3955                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3956                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3957                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3958                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3959                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3960         };
3961
3962         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3963                   genlmsg_attrlen(gnlh, 0), NULL);
3964
3965         /*
3966          * TODO: validate the interface and mac address!
3967          * Otherwise, there's a race condition as soon as
3968          * the kernel starts sending station notifications.
3969          */
3970
3971         if (!tb[NL80211_ATTR_STA_INFO]) {
3972                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3973                 return NL_SKIP;
3974         }
3975         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3976                              tb[NL80211_ATTR_STA_INFO],
3977                              stats_policy)) {
3978                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3979                 return NL_SKIP;
3980         }
3981
3982         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3983                 data->inactive_msec =
3984                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3985         if (stats[NL80211_STA_INFO_RX_BYTES])
3986                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3987         if (stats[NL80211_STA_INFO_TX_BYTES])
3988                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3989         if (stats[NL80211_STA_INFO_RX_PACKETS])
3990                 data->rx_packets =
3991                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3992         if (stats[NL80211_STA_INFO_TX_PACKETS])
3993                 data->tx_packets =
3994                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3995
3996         return NL_SKIP;
3997 }
3998
3999 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4000                               const u8 *addr)
4001 {
4002         struct wpa_driver_nl80211_data *drv = priv;
4003         struct nl_msg *msg;
4004
4005         os_memset(data, 0, sizeof(*data));
4006         msg = nlmsg_alloc();
4007         if (!msg)
4008                 return -ENOMEM;
4009
4010         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4011                     0, NL80211_CMD_GET_STATION, 0);
4012
4013         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4014         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4015
4016         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4017  nla_put_failure:
4018         return -ENOBUFS;
4019 }
4020
4021
4022 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4023                                     int cw_min, int cw_max, int burst_time)
4024 {
4025         struct wpa_driver_nl80211_data *drv = priv;
4026         struct nl_msg *msg;
4027         struct nlattr *txq, *params;
4028
4029         msg = nlmsg_alloc();
4030         if (!msg)
4031                 return -1;
4032
4033         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4034                     0, NL80211_CMD_SET_WIPHY, 0);
4035
4036         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4037
4038         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4039         if (!txq)
4040                 goto nla_put_failure;
4041
4042         /* We are only sending parameters for a single TXQ at a time */
4043         params = nla_nest_start(msg, 1);
4044         if (!params)
4045                 goto nla_put_failure;
4046
4047         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4048         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4049          * 32 usec, so need to convert the value here. */
4050         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4051         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4052         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4053         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4054
4055         nla_nest_end(msg, params);
4056
4057         nla_nest_end(msg, txq);
4058
4059         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4060                 return 0;
4061  nla_put_failure:
4062         return -1;
4063 }
4064
4065
4066 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
4067 {
4068         struct wpa_driver_nl80211_data *drv = priv;
4069         int ifidx;
4070         struct i802_bss *bss;
4071
4072         bss = os_zalloc(sizeof(*bss));
4073         if (bss == NULL)
4074                 return -1;
4075
4076         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
4077         if (ifidx < 0) {
4078                 os_free(bss);
4079                 return -1;
4080         }
4081         bss->ifindex = ifidx;
4082         if (hostapd_set_iface_flags(priv, ifname, 1)) {
4083                 nl80211_remove_iface(priv, ifidx);
4084                 os_free(bss);
4085                 return -1;
4086         }
4087         bss->next = drv->bss.next;
4088         drv->bss.next = bss;
4089         return 0;
4090 }
4091
4092
4093 static int i802_bss_remove(void *priv, const char *ifname)
4094 {
4095         struct wpa_driver_nl80211_data *drv = priv;
4096         struct i802_bss *bss, *prev;
4097         int ifindex = if_nametoindex(ifname);
4098         nl80211_remove_iface(priv, ifindex);
4099         prev = &drv->bss;
4100         bss = drv->bss.next;
4101         while (bss) {
4102                 if (ifindex == bss->ifindex) {
4103                         prev->next = bss->next;
4104                         os_free(bss);
4105                         break;
4106                 }
4107                 prev = bss;
4108                 bss = bss->next;
4109         }
4110         return 0;
4111 }
4112
4113
4114 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4115 {
4116         struct wpa_driver_nl80211_data *drv = priv;
4117         struct nl_msg *msg;
4118
4119         msg = nlmsg_alloc();
4120         if (!msg)
4121                 return -ENOMEM;
4122
4123         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4124                     NL80211_CMD_SET_BSS, 0);
4125
4126         if (cts >= 0)
4127                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4128         if (preamble >= 0)
4129                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4130         if (slot >= 0)
4131                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4132
4133         /* TODO: multi-BSS support */
4134         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4135
4136         return send_and_recv_msgs(drv, msg, NULL, NULL);
4137  nla_put_failure:
4138         return -ENOBUFS;
4139 }
4140
4141
4142 static int i802_set_cts_protect(void *priv, int value)
4143 {
4144         return i802_set_bss(priv, value, -1, -1);
4145 }
4146
4147
4148 static int i802_set_preamble(void *priv, int value)
4149 {
4150         return i802_set_bss(priv, -1, value, -1);
4151 }
4152
4153
4154 static int i802_set_short_slot_time(void *priv, int value)
4155 {
4156         return i802_set_bss(priv, -1, -1, value);
4157 }
4158
4159
4160 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
4161 {
4162         switch (type) {
4163         case HOSTAPD_IF_VLAN:
4164                 return NL80211_IFTYPE_AP_VLAN;
4165         }
4166         return -1;
4167 }
4168
4169
4170 static int i802_if_add(const char *iface, void *priv,
4171                        enum hostapd_driver_if_type type, char *ifname,
4172                        const u8 *addr)
4173 {
4174         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
4175                 return -1;
4176         return 0;
4177 }
4178
4179
4180 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
4181                           char *ifname, const u8 *addr)
4182 {
4183         /* unused at the moment */
4184         return -1;
4185 }
4186
4187
4188 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
4189                           const char *ifname, const u8 *addr)
4190 {
4191         nl80211_remove_iface(priv, if_nametoindex(ifname));
4192         return 0;
4193 }
4194
4195
4196 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4197                              const char *ifname, int vlan_id)
4198 {
4199         struct wpa_driver_nl80211_data *drv = priv;
4200         struct nl_msg *msg;
4201
4202         msg = nlmsg_alloc();
4203         if (!msg)
4204                 return -ENOMEM;
4205
4206         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4207                     0, NL80211_CMD_SET_STATION, 0);
4208
4209         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4210                     if_nametoindex(drv->ifname));
4211         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4212         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4213                     if_nametoindex(ifname));
4214
4215         return send_and_recv_msgs(drv, msg, NULL, NULL);
4216  nla_put_failure:
4217         return -ENOBUFS;
4218 }
4219
4220
4221 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4222 {
4223         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4224         struct sockaddr_ll lladdr;
4225         unsigned char buf[3000];
4226         int len;
4227         socklen_t fromlen = sizeof(lladdr);
4228
4229         len = recvfrom(sock, buf, sizeof(buf), 0,
4230                        (struct sockaddr *)&lladdr, &fromlen);
4231         if (len < 0) {
4232                 perror("recv");
4233                 return;
4234         }
4235
4236         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4237                 void *ctx;
4238                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4239                 if (!ctx)
4240                         return;
4241                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4242         }
4243 }
4244
4245
4246 static int i802_get_inact_sec(void *priv, const u8 *addr)
4247 {
4248         struct hostap_sta_driver_data data;
4249         int ret;
4250
4251         data.inactive_msec = (unsigned long) -1;
4252         ret = i802_read_sta_data(priv, &data, addr);
4253         if (ret || data.inactive_msec == (unsigned long) -1)
4254                 return -1;
4255         return data.inactive_msec / 1000;
4256 }
4257
4258
4259 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4260 {
4261 #if 0
4262         /* TODO */
4263 #endif
4264         return 0;
4265 }
4266
4267
4268 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4269                            int reason)
4270 {
4271         struct wpa_driver_nl80211_data *drv = priv;
4272         struct ieee80211_mgmt mgmt;
4273
4274         memset(&mgmt, 0, sizeof(mgmt));
4275         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4276                                           WLAN_FC_STYPE_DEAUTH);
4277         memcpy(mgmt.da, addr, ETH_ALEN);
4278         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4279         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4280         mgmt.u.deauth.reason_code = host_to_le16(reason);
4281         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4282                                             IEEE80211_HDRLEN +
4283                                             sizeof(mgmt.u.deauth));
4284 }
4285
4286
4287 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4288                              int reason)
4289 {
4290         struct wpa_driver_nl80211_data *drv = priv;
4291         struct ieee80211_mgmt mgmt;
4292
4293         memset(&mgmt, 0, sizeof(mgmt));
4294         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4295                                           WLAN_FC_STYPE_DISASSOC);
4296         memcpy(mgmt.da, addr, ETH_ALEN);
4297         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4298         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4299         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4300         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4301                                             IEEE80211_HDRLEN +
4302                                             sizeof(mgmt.u.disassoc));
4303 }
4304
4305
4306 static void *i802_init(struct hostapd_data *hapd,
4307                        struct wpa_init_params *params)
4308 {
4309         struct wpa_driver_nl80211_data *drv;
4310         size_t i;
4311
4312         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4313         if (drv == NULL)
4314                 return NULL;
4315
4316         drv->bss.ifindex = drv->ifindex;
4317
4318         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4319         drv->if_indices = drv->default_if_indices;
4320         for (i = 0; i < params->num_bridge; i++) {
4321                 if (params->bridge[i])
4322                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4323         }
4324
4325         /* start listening for EAPOL on the default AP interface */
4326         add_ifidx(drv, drv->ifindex);
4327
4328         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4329                 goto failed;
4330
4331         if (params->bssid) {
4332                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4333                         goto failed;
4334         }
4335
4336         if (nl80211_set_mode(drv, drv->ifindex, NL80211_IFTYPE_AP)) {
4337                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4338                            "into AP mode", drv->ifname);
4339                 goto failed;
4340         }
4341
4342         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4343                 goto failed;
4344
4345         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4346         if (drv->eapol_sock < 0) {
4347                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4348                 goto failed;
4349         }
4350
4351         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4352         {
4353                 printf("Could not register read socket for eapol\n");
4354                 goto failed;
4355         }
4356
4357         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4358                 goto failed;
4359
4360         return drv;
4361
4362 failed:
4363         nl80211_remove_monitor_interface(drv);
4364         if (drv->ioctl_sock >= 0)
4365                 close(drv->ioctl_sock);
4366
4367         genl_family_put(drv->nl80211);
4368         nl_cache_free(drv->nl_cache);
4369         nl_handle_destroy(drv->nl_handle);
4370         nl_cb_put(drv->nl_cb);
4371
4372         os_free(drv);
4373         return NULL;
4374 }
4375
4376
4377 static void i802_deinit(void *priv)
4378 {
4379         wpa_driver_nl80211_deinit(priv);
4380 }
4381
4382 #endif /* HOSTAPD */
4383
4384
4385 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4386         .name = "nl80211",
4387         .desc = "Linux nl80211/cfg80211",
4388 #ifndef HOSTAPD
4389         .get_bssid = wpa_driver_nl80211_get_bssid,
4390         .get_ssid = wpa_driver_nl80211_get_ssid,
4391         .set_key = wpa_driver_nl80211_set_key,
4392 #endif /* HOSTAPD */
4393         .scan2 = wpa_driver_nl80211_scan,
4394         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4395 #ifndef HOSTAPD
4396         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4397         .disassociate = wpa_driver_nl80211_disassociate,
4398         .authenticate = wpa_driver_nl80211_authenticate,
4399         .associate = wpa_driver_nl80211_associate,
4400         .init = wpa_driver_nl80211_init,
4401         .deinit = wpa_driver_nl80211_deinit,
4402         .get_capa = wpa_driver_nl80211_get_capa,
4403         .set_operstate = wpa_driver_nl80211_set_operstate,
4404         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4405 #endif /* HOSTAPD */
4406         .set_country = wpa_driver_nl80211_set_country,
4407         .set_mode = wpa_driver_nl80211_set_mode,
4408         .set_beacon = wpa_driver_nl80211_set_beacon,
4409 #if defined(CONFIG_AP) || defined(HOSTAPD)
4410         .send_mlme = wpa_driver_nl80211_send_mlme,
4411         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4412         .sta_add = wpa_driver_nl80211_sta_add,
4413         .sta_remove = wpa_driver_nl80211_sta_remove,
4414         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4415         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4416 #endif /* CONFIG_AP || HOSTAPD */
4417 #ifdef HOSTAPD
4418         .hapd_init = i802_init,
4419         .hapd_deinit = i802_deinit,
4420         .hapd_set_key = i802_set_key,
4421         .get_seqnum = i802_get_seqnum,
4422         .flush = i802_flush,
4423         .read_sta_data = i802_read_sta_data,
4424         .sta_deauth = i802_sta_deauth,
4425         .sta_disassoc = i802_sta_disassoc,
4426         .get_inact_sec = i802_get_inact_sec,
4427         .sta_clear_stats = i802_sta_clear_stats,
4428         .set_freq = i802_set_freq,
4429         .set_rts = i802_set_rts,
4430         .set_frag = i802_set_frag,
4431         .set_rate_sets = i802_set_rate_sets,
4432         .set_cts_protect = i802_set_cts_protect,
4433         .set_preamble = i802_set_preamble,
4434         .set_short_slot_time = i802_set_short_slot_time,
4435         .set_tx_queue_params = i802_set_tx_queue_params,
4436         .bss_add = i802_bss_add,
4437         .bss_remove = i802_bss_remove,
4438         .if_add = i802_if_add,
4439         .if_update = i802_if_update,
4440         .if_remove = i802_if_remove,
4441         .set_sta_vlan = i802_set_sta_vlan,
4442 #endif /* HOSTAPD */
4443 };