www.project-moonshot.org Git - mech_eap.orig/blob - src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2002-2008, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  * Copyright (c) 2009, Atheros Communications
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License version 2 as
  11  * published by the Free Software Foundation.
  12  *
  13  * Alternatively, this software may be distributed under the terms of BSD
  14  * license.
  15  *
  16  * See README and COPYING for more details.
  17  */
  18
  19 #include "includes.h"
  20 #include <sys/ioctl.h>
  21 #include <net/if_arp.h>
  22 #include <net/if.h>
  23 #include <netlink/genl/genl.h>
  24 #include <netlink/genl/family.h>
  25 #include <netlink/genl/ctrl.h>
  26 #include <netpacket/packet.h>
  27 #include <linux/filter.h>
  28 #include "nl80211_copy.h"
  29
  30 #include "common.h"
  31 #include "radiotap.h"
  32 #include "radiotap_iter.h"
  33 #include "eloop.h"
  34 #include "common/ieee802_11_defs.h"
  35 #include "driver.h"
  36
  37 #ifdef CONFIG_LIBNL20
  38 /* libnl 2.0 compatibility code */
  39 #define nl_handle nl_sock
  40 #define nl_handle_alloc_cb nl_socket_alloc_cb
  41 #define nl_handle_destroy nl_socket_free
  42 #endif /* CONFIG_LIBNL20 */
  43
  44
  45 #ifndef IFF_LOWER_UP
  46 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  47 #endif
  48 #ifndef IFF_DORMANT
  49 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  50 #endif
  51
  52 #ifndef IF_OPER_DORMANT
  53 #define IF_OPER_DORMANT 5
  54 #endif
  55 #ifndef IF_OPER_UP
  56 #define IF_OPER_UP 6
  57 #endif
  58
  59 struct i802_bss {
  60         struct i802_bss *next;
  61         int ifindex;
  62         unsigned int beacon_set:1;
  63 };
  64
  65 struct wpa_driver_nl80211_data {
  66         void *ctx;
  67         int link_event_sock;
  68         int ioctl_sock; /* socket for ioctl() use */
  69         char ifname[IFNAMSIZ + 1];
  70         int ifindex;
  71         int if_removed;
  72         struct wpa_driver_capa capa;
  73         int has_capability;
  74
  75         int operstate;
  76
  77         int scan_complete_events;
  78
  79         struct nl_handle *nl_handle;
  80         struct nl_handle *nl_handle_event;
  81         struct nl_cache *nl_cache;
  82         struct nl_cache *nl_cache_event;
  83         struct nl_cb *nl_cb;
  84         struct genl_family *nl80211;
  85
  86         u8 auth_bssid[ETH_ALEN];
  87         u8 bssid[ETH_ALEN];
  88         int associated;
  89         u8 ssid[32];
  90         size_t ssid_len;
  91         int nlmode;
  92         int ap_scan_as_station;
  93
  94         int monitor_sock;
  95         int monitor_ifidx;
  96
  97         unsigned int beacon_set:1;
  98
  99 #ifdef HOSTAPD
 100         int eapol_sock; /* socket for EAPOL frames */
 101
 102         int default_if_indices[16];
 103         int *if_indices;
 104         int num_if_indices;
 105
 106         struct i802_bss bss;
 107
 108         int last_freq;
 109         int last_freq_ht;
 110 #endif /* HOSTAPD */
 111 };
 112
 113
 114 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 115                                             void *timeout_ctx);
 116 static int wpa_driver_nl80211_set_mode(void *priv, int mode);
 117 static int
 118 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 119 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
 120                                    const u8 *addr, int cmd, u16 reason_code);
 121 static void nl80211_remove_monitor_interface(
 122         struct wpa_driver_nl80211_data *drv);
 123
 124 #ifdef HOSTAPD
 125 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 126 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx);
 127 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
 128                                  int ifindex);
 129 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq);
 130 #endif /* HOSTAPD */
 131
 132
 133 /* nl80211 code */
 134 static int ack_handler(struct nl_msg *msg, void *arg)
 135 {
 136         int *err = arg;
 137         *err = 0;
 138         return NL_STOP;
 139 }
 140
 141 static int finish_handler(struct nl_msg *msg, void *arg)
 142 {
 143         int *ret = arg;
 144         *ret = 0;
 145         return NL_SKIP;
 146 }
 147
 148 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 149                          void *arg)
 150 {
 151         int *ret = arg;
 152         *ret = err->error;
 153         return NL_SKIP;
 154 }
 155
 156
 157 static int no_seq_check(struct nl_msg *msg, void *arg)
 158 {
 159         return NL_OK;
 160 }
 161
 162
 163 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 164                               struct nl_msg *msg,
 165                               int (*valid_handler)(struct nl_msg *, void *),
 166                               void *valid_data)
 167 {
 168         struct nl_cb *cb;
 169         int err = -ENOMEM;
 170
 171         cb = nl_cb_clone(drv->nl_cb);
 172         if (!cb)
 173                 goto out;
 174
 175         err = nl_send_auto_complete(drv->nl_handle, msg);
 176         if (err < 0)
 177                 goto out;
 178
 179         err = 1;
 180
 181         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 182         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 183         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 184
 185         if (valid_handler)
 186                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 187                           valid_handler, valid_data);
 188
 189         while (err > 0)
 190                 nl_recvmsgs(drv->nl_handle, cb);
 191  out:
 192         nl_cb_put(cb);
 193         nlmsg_free(msg);
 194         return err;
 195 }
 196
 197
 198 struct family_data {
 199         const char *group;
 200         int id;
 201 };
 202
 203
 204 static int family_handler(struct nl_msg *msg, void *arg)
 205 {
 206         struct family_data *res = arg;
 207         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 208         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 209         struct nlattr *mcgrp;
 210         int i;
 211
 212         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 213                   genlmsg_attrlen(gnlh, 0), NULL);
 214         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 215                 return NL_SKIP;
 216
 217         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 218                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 219                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 220                           nla_len(mcgrp), NULL);
 221                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 222                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 223                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 224                                res->group,
 225                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 226                         continue;
 227                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 228                 break;
 229         };
 230
 231         return NL_SKIP;
 232 }
 233
 234
 235 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 236                                const char *family, const char *group)
 237 {
 238         struct nl_msg *msg;
 239         int ret = -1;
 240         struct family_data res = { group, -ENOENT };
 241
 242         msg = nlmsg_alloc();
 243         if (!msg)
 244                 return -ENOMEM;
 245         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 246                     0, 0, CTRL_CMD_GETFAMILY, 0);
 247         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 248
 249         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 250         msg = NULL;
 251         if (ret == 0)
 252                 ret = res.id;
 253
 254 nla_put_failure:
 255         nlmsg_free(msg);
 256         return ret;
 257 }
 258
 259
 260 #ifdef HOSTAPD
 261 static int get_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 262                         const char *ifname, u8 *addr)
 263 {
 264         struct ifreq ifr;
 265
 266         os_memset(&ifr, 0, sizeof(ifr));
 267         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 268         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr)) {
 269                 wpa_printf(MSG_ERROR, "%s: ioctl(SIOCGIFHWADDR): %d (%s)",
 270                            ifname, errno, strerror(errno));
 271                 return -1;
 272         }
 273
 274         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
 275                 wpa_printf(MSG_ERROR, "%s: Invalid HW-addr family 0x%04x",
 276                            ifname, ifr.ifr_hwaddr.sa_family);
 277                 return -1;
 278         }
 279         os_memcpy(addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
 280
 281         return 0;
 282 }
 283
 284
 285 static int set_ifhwaddr(struct wpa_driver_nl80211_data *drv,
 286                         const char *ifname, const u8 *addr)
 287 {
 288         struct ifreq ifr;
 289
 290         os_memset(&ifr, 0, sizeof(ifr));
 291         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 292         os_memcpy(ifr.ifr_hwaddr.sa_data, addr, ETH_ALEN);
 293         ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
 294
 295         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
 296                 wpa_printf(MSG_DEBUG, "%s: ioctl(SIOCSIFHWADDR): %d (%s)",
 297                            ifname, errno, strerror(errno));
 298                 return -1;
 299         }
 300
 301         return 0;
 302 }
 303 #endif /* HOSTAPD */
 304
 305
 306 static int wpa_driver_nl80211_send_oper_ifla(
 307         struct wpa_driver_nl80211_data *drv,
 308         int linkmode, int operstate)
 309 {
 310         struct {
 311                 struct nlmsghdr hdr;
 312                 struct ifinfomsg ifinfo;
 313                 char opts[16];
 314         } req;
 315         struct rtattr *rta;
 316         static int nl_seq;
 317         ssize_t ret;
 318
 319         os_memset(&req, 0, sizeof(req));
 320
 321         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 322         req.hdr.nlmsg_type = RTM_SETLINK;
 323         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 324         req.hdr.nlmsg_seq = ++nl_seq;
 325         req.hdr.nlmsg_pid = 0;
 326
 327         req.ifinfo.ifi_family = AF_UNSPEC;
 328         req.ifinfo.ifi_type = 0;
 329         req.ifinfo.ifi_index = drv->ifindex;
 330         req.ifinfo.ifi_flags = 0;
 331         req.ifinfo.ifi_change = 0;
 332
 333         if (linkmode != -1) {
 334                 rta = aliasing_hide_typecast(
 335                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
 336                         struct rtattr);
 337                 rta->rta_type = IFLA_LINKMODE;
 338                 rta->rta_len = RTA_LENGTH(sizeof(char));
 339                 *((char *) RTA_DATA(rta)) = linkmode;
 340                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 341                         RTA_LENGTH(sizeof(char));
 342         }
 343         if (operstate != -1) {
 344                 rta = aliasing_hide_typecast(
 345                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len)),
 346                         struct rtattr);
 347                 rta->rta_type = IFLA_OPERSTATE;
 348                 rta->rta_len = RTA_LENGTH(sizeof(char));
 349                 *((char *) RTA_DATA(rta)) = operstate;
 350                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 351                         RTA_LENGTH(sizeof(char));
 352         }
 353
 354         wpa_printf(MSG_DEBUG, "nl80211: Operstate: linkmode=%d, operstate=%d",
 355                    linkmode, operstate);
 356
 357         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 358         if (ret < 0) {
 359                 wpa_printf(MSG_DEBUG, "nl80211: Sending operstate IFLA failed:"
 360                            " %s (assume operstate is not supported)",
 361                            strerror(errno));
 362         }
 363
 364         return ret < 0 ? -1 : 0;
 365 }
 366
 367
 368 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 369 {
 370         struct wpa_driver_nl80211_data *drv = priv;
 371         if (!drv->associated)
 372                 return -1;
 373         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 374         return 0;
 375 }
 376
 377
 378 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 379 {
 380         struct wpa_driver_nl80211_data *drv = priv;
 381         if (!drv->associated)
 382                 return -1;
 383         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 384         return drv->ssid_len;
 385 }
 386
 387
 388 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 389                                           void *ctx, char *buf, size_t len,
 390                                           int del)
 391 {
 392         union wpa_event_data event;
 393
 394         os_memset(&event, 0, sizeof(event));
 395         if (len > sizeof(event.interface_status.ifname))
 396                 len = sizeof(event.interface_status.ifname) - 1;
 397         os_memcpy(event.interface_status.ifname, buf, len);
 398         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 399                 EVENT_INTERFACE_ADDED;
 400
 401         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 402                    del ? "DEL" : "NEW",
 403                    event.interface_status.ifname,
 404                    del ? "removed" : "added");
 405
 406         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 407                 if (del)
 408                         drv->if_removed = 1;
 409                 else
 410                         drv->if_removed = 0;
 411         }
 412
 413         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 414 }
 415
 416
 417 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 418                                          struct nlmsghdr *h)
 419 {
 420         struct ifinfomsg *ifi;
 421         int attrlen, _nlmsg_len, rta_len;
 422         struct rtattr *attr;
 423
 424         ifi = NLMSG_DATA(h);
 425
 426         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 427
 428         attrlen = h->nlmsg_len - _nlmsg_len;
 429         if (attrlen < 0)
 430                 return 0;
 431
 432         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 433
 434         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 435         while (RTA_OK(attr, attrlen)) {
 436                 if (attr->rta_type == IFLA_IFNAME) {
 437                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 438                             == 0)
 439                                 return 1;
 440                         else
 441                                 break;
 442                 }
 443                 attr = RTA_NEXT(attr, attrlen);
 444         }
 445
 446         return 0;
 447 }
 448
 449
 450 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 451                                           int ifindex, struct nlmsghdr *h)
 452 {
 453         if (drv->ifindex == ifindex)
 454                 return 1;
 455
 456         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 457                 drv->ifindex = if_nametoindex(drv->ifname);
 458                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 459                            "interface");
 460                 wpa_driver_nl80211_finish_drv_init(drv);
 461                 return 1;
 462         }
 463
 464         return 0;
 465 }
 466
 467
 468 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 469                                               void *ctx, struct nlmsghdr *h,
 470                                               size_t len)
 471 {
 472         struct ifinfomsg *ifi;
 473         int attrlen, _nlmsg_len, rta_len;
 474         struct rtattr * attr;
 475
 476         if (len < sizeof(*ifi))
 477                 return;
 478
 479         ifi = NLMSG_DATA(h);
 480
 481         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 482                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 483                            ifi->ifi_index);
 484                 return;
 485         }
 486
 487         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 488                    "(%s%s%s%s)",
 489                    drv->operstate, ifi->ifi_flags,
 490                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 491                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 492                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 493                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 494         /*
 495          * Some drivers send the association event before the operup event--in
 496          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 497          * fails. This will hit us when wpa_supplicant does not need to do
 498          * IEEE 802.1X authentication
 499          */
 500         if (drv->operstate == 1 &&
 501             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 502             !(ifi->ifi_flags & IFF_RUNNING))
 503                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 504
 505         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 506
 507         attrlen = h->nlmsg_len - _nlmsg_len;
 508         if (attrlen < 0)
 509                 return;
 510
 511         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 512
 513         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 514         while (RTA_OK(attr, attrlen)) {
 515                 if (attr->rta_type == IFLA_IFNAME) {
 516                         wpa_driver_nl80211_event_link(
 517                                 drv, ctx,
 518                                 ((char *) attr) + rta_len,
 519                                 attr->rta_len - rta_len, 0);
 520                 }
 521                 attr = RTA_NEXT(attr, attrlen);
 522         }
 523 }
 524
 525
 526 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 527                                               void *ctx, struct nlmsghdr *h,
 528                                               size_t len)
 529 {
 530         struct ifinfomsg *ifi;
 531         int attrlen, _nlmsg_len, rta_len;
 532         struct rtattr * attr;
 533
 534         if (len < sizeof(*ifi))
 535                 return;
 536
 537         ifi = NLMSG_DATA(h);
 538
 539         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 540
 541         attrlen = h->nlmsg_len - _nlmsg_len;
 542         if (attrlen < 0)
 543                 return;
 544
 545         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 546
 547         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 548         while (RTA_OK(attr, attrlen)) {
 549                 if (attr->rta_type == IFLA_IFNAME) {
 550                         wpa_driver_nl80211_event_link(
 551                                 drv, ctx,
 552                                 ((char *) attr) + rta_len,
 553                                 attr->rta_len - rta_len, 1);
 554                 }
 555                 attr = RTA_NEXT(attr, attrlen);
 556         }
 557 }
 558
 559
 560 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 561                                                   void *sock_ctx)
 562 {
 563         char buf[8192];
 564         int left;
 565         struct sockaddr_nl from;
 566         socklen_t fromlen;
 567         struct nlmsghdr *h;
 568         int max_events = 10;
 569
 570 try_again:
 571         fromlen = sizeof(from);
 572         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 573                         (struct sockaddr *) &from, &fromlen);
 574         if (left < 0) {
 575                 if (errno != EINTR && errno != EAGAIN)
 576                         perror("recvfrom(netlink)");
 577                 return;
 578         }
 579
 580         h = (struct nlmsghdr *) buf;
 581         while (left >= (int) sizeof(*h)) {
 582                 int len, plen;
 583
 584                 len = h->nlmsg_len;
 585                 plen = len - sizeof(*h);
 586                 if (len > left || plen < 0) {
 587                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 588                                    "len=%d left=%d plen=%d",
 589                                    len, left, plen);
 590                         break;
 591                 }
 592
 593                 switch (h->nlmsg_type) {
 594                 case RTM_NEWLINK:
 595                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 596                                                           h, plen);
 597                         break;
 598                 case RTM_DELLINK:
 599                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 600                                                           h, plen);
 601                         break;
 602                 }
 603
 604                 len = NLMSG_ALIGN(len);
 605                 left -= len;
 606                 h = (struct nlmsghdr *) ((char *) h + len);
 607         }
 608
 609         if (left > 0) {
 610                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 611                            "message", left);
 612         }
 613
 614         if (--max_events > 0) {
 615                 /*
 616                  * Try to receive all events in one eloop call in order to
 617                  * limit race condition on cases where AssocInfo event, Assoc
 618                  * event, and EAPOL frames are received more or less at the
 619                  * same time. We want to process the event messages first
 620                  * before starting EAPOL processing.
 621                  */
 622                 goto try_again;
 623         }
 624 }
 625
 626
 627 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 628                             const u8 *frame, size_t len)
 629 {
 630         const struct ieee80211_mgmt *mgmt;
 631         union wpa_event_data event;
 632
 633         mgmt = (const struct ieee80211_mgmt *) frame;
 634         if (len < 24 + sizeof(mgmt->u.auth)) {
 635                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 636                            "frame");
 637                 return;
 638         }
 639
 640         os_memcpy(drv->auth_bssid, mgmt->sa, ETH_ALEN);
 641         os_memset(&event, 0, sizeof(event));
 642         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 643         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 644         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 645         if (len > 24 + sizeof(mgmt->u.auth)) {
 646                 event.auth.ies = mgmt->u.auth.variable;
 647                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 648         }
 649
 650         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 651 }
 652
 653
 654 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 655                             const u8 *frame, size_t len)
 656 {
 657         const struct ieee80211_mgmt *mgmt;
 658         union wpa_event_data event;
 659         u16 status;
 660
 661         mgmt = (const struct ieee80211_mgmt *) frame;
 662         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 663                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 664                            "frame");
 665                 return;
 666         }
 667
 668         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 669         if (status != WLAN_STATUS_SUCCESS) {
 670                 os_memset(&event, 0, sizeof(event));
 671                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 672                         event.assoc_reject.resp_ies =
 673                                 (u8 *) mgmt->u.assoc_resp.variable;
 674                         event.assoc_reject.resp_ies_len =
 675                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 676                 }
 677                 event.assoc_reject.status_code = status;
 678
 679                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 680                 return;
 681         }
 682
 683         drv->associated = 1;
 684         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 685
 686         os_memset(&event, 0, sizeof(event));
 687         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 688                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 689                 event.assoc_info.resp_ies_len =
 690                         len - 24 - sizeof(mgmt->u.assoc_resp);
 691         }
 692
 693         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 694 }
 695
 696
 697 static void mlme_event_connect(struct wpa_driver_nl80211_data *drv,
 698                                enum nl80211_commands cmd, struct nlattr *status,
 699                                struct nlattr *addr, struct nlattr *req_ie,
 700                                struct nlattr *resp_ie)
 701 {
 702         union wpa_event_data event;
 703
 704         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 705                 /*
 706                  * Avoid reporting two association events that would confuse
 707                  * the core code.
 708                  */
 709                 wpa_printf(MSG_DEBUG, "nl80211: Ignore connect event (cmd=%d) "
 710                            "when using userspace SME", cmd);
 711                 return;
 712         }
 713
 714         os_memset(&event, 0, sizeof(event));
 715         if (cmd == NL80211_CMD_CONNECT &&
 716             nla_get_u16(status) != WLAN_STATUS_SUCCESS) {
 717                 if (resp_ie) {
 718                         event.assoc_reject.resp_ies = nla_data(resp_ie);
 719                         event.assoc_reject.resp_ies_len = nla_len(resp_ie);
 720                 }
 721                 event.assoc_reject.status_code = nla_get_u16(status);
 722                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 723                 return;
 724         }
 725
 726         drv->associated = 1;
 727         if (addr)
 728                 os_memcpy(drv->bssid, nla_data(addr), ETH_ALEN);
 729
 730         if (req_ie) {
 731                 event.assoc_info.req_ies = nla_data(req_ie);
 732                 event.assoc_info.req_ies_len = nla_len(req_ie);
 733         }
 734         if (resp_ie) {
 735                 event.assoc_info.resp_ies = nla_data(resp_ie);
 736                 event.assoc_info.resp_ies_len = nla_len(resp_ie);
 737         }
 738
 739         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 740 }
 741
 742
 743 static void mlme_timeout_event(struct wpa_driver_nl80211_data *drv,
 744                                enum nl80211_commands cmd, struct nlattr *addr)
 745 {
 746         union wpa_event_data event;
 747         enum wpa_event_type ev;
 748
 749         if (nla_len(addr) != ETH_ALEN)
 750                 return;
 751
 752         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d; timeout with " MACSTR,
 753                    cmd, MAC2STR((u8 *) nla_data(addr)));
 754
 755         if (cmd == NL80211_CMD_AUTHENTICATE)
 756                 ev = EVENT_AUTH_TIMED_OUT;
 757         else if (cmd == NL80211_CMD_ASSOCIATE)
 758                 ev = EVENT_ASSOC_TIMED_OUT;
 759         else
 760                 return;
 761
 762         os_memset(&event, 0, sizeof(event));
 763         os_memcpy(event.timeout_event.addr, nla_data(addr), ETH_ALEN);
 764         wpa_supplicant_event(drv->ctx, ev, &event);
 765 }
 766
 767
 768 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 769                        enum nl80211_commands cmd, struct nlattr *frame,
 770                        struct nlattr *addr, struct nlattr *timed_out)
 771 {
 772         if (timed_out && addr) {
 773                 mlme_timeout_event(drv, cmd, addr);
 774                 return;
 775         }
 776
 777         if (frame == NULL) {
 778                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 779                            "data", cmd);
 780                 return;
 781         }
 782
 783         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 784         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 785                     nla_data(frame), nla_len(frame));
 786
 787         switch (cmd) {
 788         case NL80211_CMD_AUTHENTICATE:
 789                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 790                 break;
 791         case NL80211_CMD_ASSOCIATE:
 792                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 793                 break;
 794         case NL80211_CMD_DEAUTHENTICATE:
 795                 drv->associated = 0;
 796                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 797                 break;
 798         case NL80211_CMD_DISASSOCIATE:
 799                 drv->associated = 0;
 800                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 801                 break;
 802         default:
 803                 break;
 804         }
 805 }
 806
 807
 808 static void mlme_event_michael_mic_failure(struct wpa_driver_nl80211_data *drv,
 809                                            struct nlattr *tb[])
 810 {
 811         union wpa_event_data data;
 812
 813         wpa_printf(MSG_DEBUG, "nl80211: MLME event Michael MIC failure");
 814         os_memset(&data, 0, sizeof(data));
 815         if (tb[NL80211_ATTR_MAC]) {
 816                 wpa_hexdump(MSG_DEBUG, "nl80211: Source MAC address",
 817                             nla_data(tb[NL80211_ATTR_MAC]),
 818                             nla_len(tb[NL80211_ATTR_MAC]));
 819                 data.michael_mic_failure.src = nla_data(tb[NL80211_ATTR_MAC]);
 820         }
 821         if (tb[NL80211_ATTR_KEY_SEQ]) {
 822                 wpa_hexdump(MSG_DEBUG, "nl80211: TSC",
 823                             nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 824                             nla_len(tb[NL80211_ATTR_KEY_SEQ]));
 825         }
 826         if (tb[NL80211_ATTR_KEY_TYPE]) {
 827                 enum nl80211_key_type key_type =
 828                         nla_get_u32(tb[NL80211_ATTR_KEY_TYPE]);
 829                 wpa_printf(MSG_DEBUG, "nl80211: Key Type %d", key_type);
 830                 if (key_type == NL80211_KEYTYPE_PAIRWISE)
 831                         data.michael_mic_failure.unicast = 1;
 832         } else
 833                 data.michael_mic_failure.unicast = 1;
 834
 835         if (tb[NL80211_ATTR_KEY_IDX]) {
 836                 u8 key_id = nla_get_u8(tb[NL80211_ATTR_KEY_IDX]);
 837                 wpa_printf(MSG_DEBUG, "nl80211: Key Id %d", key_id);
 838         }
 839
 840         wpa_supplicant_event(drv->ctx, EVENT_MICHAEL_MIC_FAILURE, &data);
 841 }
 842
 843
 844 static void mlme_event_join_ibss(struct wpa_driver_nl80211_data *drv,
 845                                  struct nlattr *tb[])
 846 {
 847         if (tb[NL80211_ATTR_MAC] == NULL) {
 848                 wpa_printf(MSG_DEBUG, "nl80211: No address in IBSS joined "
 849                            "event");
 850                 return;
 851         }
 852         os_memcpy(drv->bssid, nla_data(tb[NL80211_ATTR_MAC]), ETH_ALEN);
 853         drv->associated = 1;
 854         wpa_printf(MSG_DEBUG, "nl80211: IBSS " MACSTR " joined",
 855                    MAC2STR(drv->bssid));
 856
 857         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, NULL);
 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         case NL80211_CMD_AUTHENTICATE:
 909         case NL80211_CMD_ASSOCIATE:
 910         case NL80211_CMD_DEAUTHENTICATE:
 911         case NL80211_CMD_DISASSOCIATE:
 912                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME],
 913                            tb[NL80211_ATTR_MAC], tb[NL80211_ATTR_TIMED_OUT]);
 914                 break;
 915         case NL80211_CMD_CONNECT:
 916         case NL80211_CMD_ROAM:
 917                 mlme_event_connect(drv, gnlh->cmd,
 918                                    tb[NL80211_ATTR_STATUS_CODE],
 919                                    tb[NL80211_ATTR_MAC],
 920                                    tb[NL80211_ATTR_REQ_IE],
 921                                    tb[NL80211_ATTR_RESP_IE]);
 922                 break;
 923         case NL80211_CMD_DISCONNECT:
 924                 if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
 925                         /*
 926                          * Avoid reporting two disassociation events that could
 927                          * confuse the core code.
 928                          */
 929                         wpa_printf(MSG_DEBUG, "nl80211: Ignore disconnect "
 930                                    "event when using userspace SME");
 931                         break;
 932                 }
 933                 drv->associated = 0;
 934                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 935                 break;
 936         case NL80211_CMD_MICHAEL_MIC_FAILURE:
 937                 mlme_event_michael_mic_failure(drv, tb);
 938                 break;
 939         case NL80211_CMD_JOIN_IBSS:
 940                 mlme_event_join_ibss(drv, tb);
 941                 break;
 942         default:
 943                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 944                            "(cmd=%d)", gnlh->cmd);
 945                 break;
 946         }
 947
 948         return NL_SKIP;
 949 }
 950
 951
 952 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 953                                              void *sock_ctx)
 954 {
 955         struct nl_cb *cb;
 956         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 957
 958         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 959
 960         cb = nl_cb_clone(drv->nl_cb);
 961         if (!cb)
 962                 return;
 963         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 964         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 965         nl_recvmsgs(drv->nl_handle_event, cb);
 966         nl_cb_put(cb);
 967 }
 968
 969
 970 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
 971                                    const char *ifname, int dev_up)
 972 {
 973         struct ifreq ifr;
 974
 975         if (drv->ioctl_sock < 0)
 976                 return -1;
 977
 978         os_memset(&ifr, 0, sizeof(ifr));
 979         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 980
 981         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 982                 perror("ioctl[SIOCGIFFLAGS]");
 983                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 984                            ifname);
 985                 return -1;
 986         }
 987
 988         if (dev_up) {
 989                 if (ifr.ifr_flags & IFF_UP)
 990                         return 0;
 991                 ifr.ifr_flags |= IFF_UP;
 992         } else {
 993                 if (!(ifr.ifr_flags & IFF_UP))
 994                         return 0;
 995                 ifr.ifr_flags &= ~IFF_UP;
 996         }
 997
 998         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 999                 perror("ioctl[SIOCSIFFLAGS]");
1000                 return -1;
1001         }
1002
1003         return 0;
1004 }
1005
1006
1007 /**
1008  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
1009  * @priv: driver_nl80211 private data
1010  * @alpha2_arg: country to which to switch to
1011  * Returns: 0 on success, -1 on failure
1012  *
1013  * This asks nl80211 to set the regulatory domain for given
1014  * country ISO / IEC alpha2.
1015  */
1016 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
1017 {
1018         struct wpa_driver_nl80211_data *drv = priv;
1019         char alpha2[3];
1020         struct nl_msg *msg;
1021
1022         msg = nlmsg_alloc();
1023         if (!msg)
1024                 return -ENOMEM;
1025
1026         alpha2[0] = alpha2_arg[0];
1027         alpha2[1] = alpha2_arg[1];
1028         alpha2[2] = '\0';
1029
1030         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1031                     0, NL80211_CMD_REQ_SET_REG, 0);
1032
1033         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1034         if (send_and_recv_msgs(drv, msg, NULL, NULL))
1035                 return -EINVAL;
1036         return 0;
1037 nla_put_failure:
1038         return -EINVAL;
1039 }
1040
1041
1042 #ifndef HOSTAPD
1043 struct wiphy_info_data {
1044         int max_scan_ssids;
1045         int ap_supported;
1046         int auth_supported;
1047         int connect_supported;
1048 };
1049
1050
1051 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
1052 {
1053         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1054         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1055         struct wiphy_info_data *info = arg;
1056
1057         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1058                   genlmsg_attrlen(gnlh, 0), NULL);
1059
1060         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
1061                 info->max_scan_ssids =
1062                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
1063
1064         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
1065                 struct nlattr *nl_mode;
1066                 int i;
1067                 nla_for_each_nested(nl_mode,
1068                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
1069                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
1070                                 info->ap_supported = 1;
1071                                 break;
1072                         }
1073                 }
1074         }
1075
1076         if (tb[NL80211_ATTR_SUPPORTED_COMMANDS]) {
1077                 struct nlattr *nl_cmd;
1078                 int i;
1079
1080                 nla_for_each_nested(nl_cmd,
1081                                     tb[NL80211_ATTR_SUPPORTED_COMMANDS], i) {
1082                         u32 cmd = nla_get_u32(nl_cmd);
1083                         if (cmd == NL80211_CMD_AUTHENTICATE)
1084                                 info->auth_supported = 1;
1085                         else if (cmd == NL80211_CMD_CONNECT)
1086                                 info->connect_supported = 1;
1087                 }
1088         }
1089
1090         return NL_SKIP;
1091 }
1092
1093
1094 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
1095                                        struct wiphy_info_data *info)
1096 {
1097         struct nl_msg *msg;
1098
1099         os_memset(info, 0, sizeof(*info));
1100         msg = nlmsg_alloc();
1101         if (!msg)
1102                 return -1;
1103
1104         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1105                     0, NL80211_CMD_GET_WIPHY, 0);
1106
1107         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1108
1109         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
1110                 return 0;
1111         msg = NULL;
1112 nla_put_failure:
1113         nlmsg_free(msg);
1114         return -1;
1115 }
1116
1117
1118 static int wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
1119 {
1120         struct wiphy_info_data info;
1121         if (wpa_driver_nl80211_get_info(drv, &info))
1122                 return -1;
1123         drv->has_capability = 1;
1124         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
1125         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
1126                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
1127                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
1128                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
1129         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
1130                 WPA_DRIVER_CAPA_ENC_WEP104 |
1131                 WPA_DRIVER_CAPA_ENC_TKIP |
1132                 WPA_DRIVER_CAPA_ENC_CCMP;
1133
1134         drv->capa.max_scan_ssids = info.max_scan_ssids;
1135         if (info.ap_supported)
1136                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
1137
1138         if (info.auth_supported)
1139                 drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1140         else if (!info.connect_supported) {
1141                 wpa_printf(MSG_INFO, "nl80211: Driver does not support "
1142                            "authentication/association or connect commands");
1143                 return -1;
1144         }
1145
1146         drv->capa.flags |= WPA_DRIVER_FLAGS_SET_KEYS_AFTER_ASSOC_DONE;
1147
1148         return 0;
1149 }
1150 #endif /* HOSTAPD */
1151
1152
1153 static int wpa_driver_nl80211_init_nl(struct wpa_driver_nl80211_data *drv,
1154                                       void *ctx)
1155 {
1156         int ret;
1157
1158         /* Initialize generic netlink and nl80211 */
1159
1160         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1161         if (drv->nl_cb == NULL) {
1162                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1163                            "callbacks");
1164                 goto err1;
1165         }
1166
1167         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1168         if (drv->nl_handle == NULL) {
1169                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1170                            "callbacks");
1171                 goto err2;
1172         }
1173
1174         drv->nl_handle_event = nl_handle_alloc_cb(drv->nl_cb);
1175         if (drv->nl_handle_event == NULL) {
1176                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1177                            "callbacks (event)");
1178                 goto err2b;
1179         }
1180
1181         if (genl_connect(drv->nl_handle)) {
1182                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1183                            "netlink");
1184                 goto err3;
1185         }
1186
1187         if (genl_connect(drv->nl_handle_event)) {
1188                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1189                            "netlink (event)");
1190                 goto err3;
1191         }
1192
1193 #ifdef CONFIG_LIBNL20
1194         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
1195                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1196                            "netlink cache");
1197                 goto err3;
1198         }
1199         if (genl_ctrl_alloc_cache(drv->nl_handle_event, &drv->nl_cache_event) <
1200             0) {
1201                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1202                            "netlink cache (event)");
1203                 goto err3b;
1204         }
1205 #else /* CONFIG_LIBNL20 */
1206         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1207         if (drv->nl_cache == NULL) {
1208                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1209                            "netlink cache");
1210                 goto err3;
1211         }
1212         drv->nl_cache_event = genl_ctrl_alloc_cache(drv->nl_handle_event);
1213         if (drv->nl_cache_event == NULL) {
1214                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1215                            "netlink cache (event)");
1216                 goto err3b;
1217         }
1218 #endif /* CONFIG_LIBNL20 */
1219
1220         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1221         if (drv->nl80211 == NULL) {
1222                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1223                            "found");
1224                 goto err4;
1225         }
1226
1227         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1228         if (ret >= 0)
1229                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1230         if (ret < 0) {
1231                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1232                            "membership for scan events: %d (%s)",
1233                            ret, strerror(-ret));
1234                 goto err4;
1235         }
1236
1237         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1238         if (ret >= 0)
1239                 ret = nl_socket_add_membership(drv->nl_handle_event, ret);
1240         if (ret < 0) {
1241                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1242                            "membership for mlme events: %d (%s)",
1243                            ret, strerror(-ret));
1244                 goto err4;
1245         }
1246
1247         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle_event),
1248                                  wpa_driver_nl80211_event_receive, drv, ctx);
1249
1250         return 0;
1251
1252 err4:
1253         nl_cache_free(drv->nl_cache_event);
1254 err3b:
1255         nl_cache_free(drv->nl_cache);
1256 err3:
1257         nl_handle_destroy(drv->nl_handle_event);
1258 err2b:
1259         nl_handle_destroy(drv->nl_handle);
1260 err2:
1261         nl_cb_put(drv->nl_cb);
1262 err1:
1263         return -1;
1264 }
1265
1266
1267 static int wpa_driver_nl80211_init_link_events(
1268         struct wpa_driver_nl80211_data *drv)
1269 {
1270         int s;
1271         struct sockaddr_nl local;
1272
1273         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1274         if (s < 0) {
1275                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1276                 return -1;
1277         }
1278
1279         os_memset(&local, 0, sizeof(local));
1280         local.nl_family = AF_NETLINK;
1281         local.nl_groups = RTMGRP_LINK;
1282         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1283                 perror("bind(netlink)");
1284                 close(s);
1285                 return -1;
1286         }
1287
1288         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1289                                  drv->ctx);
1290         drv->link_event_sock = s;
1291
1292         return 0;
1293 }
1294
1295
1296 /**
1297  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
1298  * @ctx: context to be used when calling wpa_supplicant functions,
1299  * e.g., wpa_supplicant_event()
1300  * @ifname: interface name, e.g., wlan0
1301  * Returns: Pointer to private data, %NULL on failure
1302  */
1303 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
1304 {
1305         struct wpa_driver_nl80211_data *drv;
1306
1307         drv = os_zalloc(sizeof(*drv));
1308         if (drv == NULL)
1309                 return NULL;
1310         drv->ctx = ctx;
1311         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
1312         drv->monitor_ifidx = -1;
1313         drv->monitor_sock = -1;
1314         drv->link_event_sock = -1;
1315         drv->ioctl_sock = -1;
1316
1317         if (wpa_driver_nl80211_init_nl(drv, ctx)) {
1318                 os_free(drv);
1319                 return NULL;
1320         }
1321
1322         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1323         if (drv->ioctl_sock < 0) {
1324                 perror("socket(PF_INET,SOCK_DGRAM)");
1325                 goto failed;
1326         }
1327
1328         if (wpa_driver_nl80211_init_link_events(drv) ||
1329             wpa_driver_nl80211_finish_drv_init(drv))
1330                 goto failed;
1331
1332         return drv;
1333
1334 failed:
1335         if (drv->link_event_sock >= 0) {
1336                 eloop_unregister_read_sock(drv->link_event_sock);
1337                 close(drv->link_event_sock);
1338         }
1339         if (drv->ioctl_sock >= 0)
1340                 close(drv->ioctl_sock);
1341
1342         genl_family_put(drv->nl80211);
1343         nl_cache_free(drv->nl_cache);
1344         nl_handle_destroy(drv->nl_handle);
1345         nl_cb_put(drv->nl_cb);
1346
1347         os_free(drv);
1348         return NULL;
1349 }
1350
1351
1352 static int
1353 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1354 {
1355         drv->ifindex = if_nametoindex(drv->ifname);
1356
1357 #ifndef HOSTAPD
1358         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0) {
1359                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1360                            "use managed mode");
1361         }
1362
1363         if (hostapd_set_iface_flags(drv, drv->ifname, 1)) {
1364                 wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1365                            "UP", drv->ifname);
1366                 return -1;
1367         }
1368
1369         if (wpa_driver_nl80211_capa(drv))
1370                 return -1;
1371
1372         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1373 #endif /* HOSTAPD */
1374
1375         return 0;
1376 }
1377
1378
1379 #ifdef HOSTAPD
1380 static void wpa_driver_nl80211_free_bss(struct wpa_driver_nl80211_data *drv)
1381 {
1382         struct i802_bss *bss, *prev;
1383         bss = drv->bss.next;
1384         while (bss) {
1385                 prev = bss;
1386                 bss = bss->next;
1387                 os_free(bss);
1388         }
1389 }
1390 #endif /* HOSTAPD */
1391
1392
1393 static int wpa_driver_nl80211_del_beacon(struct wpa_driver_nl80211_data *drv)
1394 {
1395         struct nl_msg *msg;
1396
1397         msg = nlmsg_alloc();
1398         if (!msg)
1399                 return -ENOMEM;
1400
1401         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1402                     0, NL80211_CMD_DEL_BEACON, 0);
1403         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1404
1405         return send_and_recv_msgs(drv, msg, NULL, NULL);
1406  nla_put_failure:
1407         return -ENOBUFS;
1408 }
1409
1410
1411 /**
1412  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1413  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1414  *
1415  * Shut down driver interface and processing of driver events. Free
1416  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1417  */
1418 static void wpa_driver_nl80211_deinit(void *priv)
1419 {
1420         struct wpa_driver_nl80211_data *drv = priv;
1421
1422         nl80211_remove_monitor_interface(drv);
1423         if (drv->monitor_sock >= 0) {
1424                 eloop_unregister_read_sock(drv->monitor_sock);
1425                 close(drv->monitor_sock);
1426         }
1427
1428         if (drv->nlmode == NL80211_IFTYPE_AP)
1429                 wpa_driver_nl80211_del_beacon(drv);
1430
1431 #ifdef HOSTAPD
1432         if (drv->last_freq_ht) {
1433                 /* Clear HT flags from the driver */
1434                 struct hostapd_freq_params freq;
1435                 os_memset(&freq, 0, sizeof(freq));
1436                 freq.freq = drv->last_freq;
1437                 i802_set_freq(priv, &freq);
1438         }
1439
1440         if (drv->eapol_sock >= 0) {
1441                 eloop_unregister_read_sock(drv->eapol_sock);
1442                 close(drv->eapol_sock);
1443         }
1444
1445         if (drv->if_indices != drv->default_if_indices)
1446                 os_free(drv->if_indices);
1447
1448         wpa_driver_nl80211_free_bss(drv);
1449 #endif /* HOSTAPD */
1450
1451         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1452
1453         if (drv->link_event_sock >= 0) {
1454                 eloop_unregister_read_sock(drv->link_event_sock);
1455                 close(drv->link_event_sock);
1456         }
1457
1458         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1459
1460         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
1461         wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA);
1462
1463         if (drv->ioctl_sock >= 0)
1464                 close(drv->ioctl_sock);
1465
1466         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle_event));
1467         genl_family_put(drv->nl80211);
1468         nl_cache_free(drv->nl_cache);
1469         nl_cache_free(drv->nl_cache_event);
1470         nl_handle_destroy(drv->nl_handle);
1471         nl_handle_destroy(drv->nl_handle_event);
1472         nl_cb_put(drv->nl_cb);
1473
1474         os_free(drv);
1475 }
1476
1477
1478 /**
1479  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1480  * @eloop_ctx: Driver private data
1481  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1482  *
1483  * This function can be used as registered timeout when starting a scan to
1484  * generate a scan completed event if the driver does not report this.
1485  */
1486 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1487 {
1488         struct wpa_driver_nl80211_data *drv = eloop_ctx;
1489         if (drv->ap_scan_as_station) {
1490                 wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP);
1491                 drv->ap_scan_as_station = 0;
1492         }
1493         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1494         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1495 }
1496
1497
1498 /**
1499  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1500  * @priv: Pointer to private driver data from wpa_driver_nl80211_init()
1501  * @params: Scan parameters
1502  * Returns: 0 on success, -1 on failure
1503  */
1504 static int wpa_driver_nl80211_scan(void *priv,
1505                                    struct wpa_driver_scan_params *params)
1506 {
1507         struct wpa_driver_nl80211_data *drv = priv;
1508         int ret = 0, timeout;
1509         struct nl_msg *msg, *ssids, *freqs;
1510         size_t i;
1511
1512         msg = nlmsg_alloc();
1513         ssids = nlmsg_alloc();
1514         freqs = nlmsg_alloc();
1515         if (!msg || !ssids || !freqs) {
1516                 nlmsg_free(msg);
1517                 nlmsg_free(ssids);
1518                 nlmsg_free(freqs);
1519                 return -1;
1520         }
1521
1522         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1523                     NL80211_CMD_TRIGGER_SCAN, 0);
1524
1525         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1526
1527         for (i = 0; i < params->num_ssids; i++) {
1528                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1529                         params->ssids[i].ssid);
1530         }
1531         if (params->num_ssids)
1532                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1533
1534         if (params->extra_ies) {
1535                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1536                         params->extra_ies);
1537         }
1538
1539         if (params->freqs) {
1540                 for (i = 0; params->freqs[i]; i++)
1541                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1542                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1543         }
1544
1545         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1546         msg = NULL;
1547         if (ret) {
1548                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1549                            "(%s)", ret, strerror(-ret));
1550 #ifdef HOSTAPD
1551                 if (drv->nlmode == NL80211_IFTYPE_AP) {
1552                         /*
1553                          * mac80211 does not allow scan requests in AP mode, so
1554                          * try to do this in station mode.
1555                          */
1556                         if (wpa_driver_nl80211_set_mode(drv,
1557                                                         IEEE80211_MODE_INFRA))
1558                                 goto nla_put_failure;
1559
1560                         if (wpa_driver_nl80211_scan(drv, params)) {
1561                                 wpa_driver_nl80211_set_mode(drv,
1562                                                             IEEE80211_MODE_AP);
1563                                 goto nla_put_failure;
1564                         }
1565
1566                         /* Restore AP mode when processing scan results */
1567                         drv->ap_scan_as_station = 1;
1568                         ret = 0;
1569                 } else
1570                         goto nla_put_failure;
1571 #else /* HOSTAPD */
1572                 goto nla_put_failure;
1573 #endif /* HOSTAPD */
1574         }
1575
1576         /* Not all drivers generate "scan completed" wireless event, so try to
1577          * read results after a timeout. */
1578         timeout = 10;
1579         if (drv->scan_complete_events) {
1580                 /*
1581                  * The driver seems to deliver events to notify when scan is
1582                  * complete, so use longer timeout to avoid race conditions
1583                  * with scanning and following association request.
1584                  */
1585                 timeout = 30;
1586         }
1587         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1588                    "seconds", ret, timeout);
1589         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1590         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1591                                drv, drv->ctx);
1592
1593 nla_put_failure:
1594         nlmsg_free(ssids);
1595         nlmsg_free(msg);
1596         nlmsg_free(freqs);
1597         return ret;
1598 }
1599
1600
1601 static int bss_info_handler(struct nl_msg *msg, void *arg)
1602 {
1603         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1604         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1605         struct nlattr *bss[NL80211_BSS_MAX + 1];
1606         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1607                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1608                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1609                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1610                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1611                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1612                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1613                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1614                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1615                 [NL80211_BSS_STATUS] = { .type = NLA_U32 },
1616                 [NL80211_BSS_SEEN_MS_AGO] = { .type = NLA_U32 },
1617         };
1618         struct wpa_scan_results *res = arg;
1619         struct wpa_scan_res **tmp;
1620         struct wpa_scan_res *r;
1621         const u8 *ie;
1622         size_t ie_len;
1623
1624         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1625                   genlmsg_attrlen(gnlh, 0), NULL);
1626         if (!tb[NL80211_ATTR_BSS])
1627                 return NL_SKIP;
1628         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1629                              bss_policy))
1630                 return NL_SKIP;
1631         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1632                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1633                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1634         } else {
1635                 ie = NULL;
1636                 ie_len = 0;
1637         }
1638
1639         r = os_zalloc(sizeof(*r) + ie_len);
1640         if (r == NULL)
1641                 return NL_SKIP;
1642         if (bss[NL80211_BSS_BSSID])
1643                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1644                           ETH_ALEN);
1645         if (bss[NL80211_BSS_FREQUENCY])
1646                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1647         if (bss[NL80211_BSS_BEACON_INTERVAL])
1648                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1649         if (bss[NL80211_BSS_CAPABILITY])
1650                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1651         r->flags |= WPA_SCAN_NOISE_INVALID;
1652         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1653                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1654                 r->level /= 100; /* mBm to dBm */
1655                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1656         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1657                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1658                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1659         } else
1660                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1661         if (bss[NL80211_BSS_TSF])
1662                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1663         if (bss[NL80211_BSS_SEEN_MS_AGO])
1664                 r->age = nla_get_u32(bss[NL80211_BSS_SEEN_MS_AGO]);
1665         r->ie_len = ie_len;
1666         if (ie)
1667                 os_memcpy(r + 1, ie, ie_len);
1668
1669         if (bss[NL80211_BSS_STATUS]) {
1670                 enum nl80211_bss_status status;
1671                 status = nla_get_u32(bss[NL80211_BSS_STATUS]);
1672                 switch (status) {
1673                 case NL80211_BSS_STATUS_AUTHENTICATED:
1674                         r->flags |= WPA_SCAN_AUTHENTICATED;
1675                         break;
1676                 case NL80211_BSS_STATUS_ASSOCIATED:
1677                         r->flags |= WPA_SCAN_ASSOCIATED;
1678                         break;
1679                 default:
1680                         break;
1681                 }
1682         }
1683
1684         tmp = os_realloc(res->res,
1685                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1686         if (tmp == NULL) {
1687                 os_free(r);
1688                 return NL_SKIP;
1689         }
1690         tmp[res->num++] = r;
1691         res->res = tmp;
1692
1693         return NL_SKIP;
1694 }
1695
1696
1697 static void clear_state_mismatch(struct wpa_driver_nl80211_data *drv,
1698                                  const u8 *addr)
1699 {
1700         if (drv->capa.flags & WPA_DRIVER_FLAGS_SME) {
1701                 wpa_printf(MSG_DEBUG, "nl80211: Clear possible state "
1702                            "mismatch");
1703                 wpa_driver_nl80211_mlme(drv, addr,
1704                                         NL80211_CMD_DEAUTHENTICATE,
1705                                         WLAN_REASON_PREV_AUTH_NOT_VALID);
1706         }
1707 }
1708
1709
1710 static void wpa_driver_nl80211_check_bss_status(
1711         struct wpa_driver_nl80211_data *drv, struct wpa_scan_results *res)
1712 {
1713         size_t i;
1714
1715         for (i = 0; i < res->num; i++) {
1716                 struct wpa_scan_res *r = res->res[i];
1717                 if (r->flags & WPA_SCAN_AUTHENTICATED) {
1718                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1719                                    "indicates BSS status with " MACSTR
1720                                    " as authenticated",
1721                                    MAC2STR(r->bssid));
1722                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1723                             os_memcmp(r->bssid, drv->bssid, ETH_ALEN) != 0 &&
1724                             os_memcmp(r->bssid, drv->auth_bssid, ETH_ALEN) !=
1725                             0) {
1726                                 wpa_printf(MSG_DEBUG, "nl80211: Unknown BSSID"
1727                                            " in local state (auth=" MACSTR
1728                                            " assoc=" MACSTR ")",
1729                                            MAC2STR(drv->auth_bssid),
1730                                            MAC2STR(drv->bssid));
1731                         }
1732                 }
1733
1734                 if (r->flags & WPA_SCAN_ASSOCIATED) {
1735                         wpa_printf(MSG_DEBUG, "nl80211: Scan results "
1736                                    "indicate BSS status with " MACSTR
1737                                    " as associated",
1738                                    MAC2STR(r->bssid));
1739                         if (drv->nlmode == NL80211_IFTYPE_STATION &&
1740                             !drv->associated) {
1741                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1742                                            "(not associated) does not match "
1743                                            "with BSS state");
1744                                 clear_state_mismatch(drv, r->bssid);
1745                         } else if (drv->nlmode == NL80211_IFTYPE_STATION &&
1746                                    os_memcmp(drv->bssid, r->bssid, ETH_ALEN) !=
1747                                    0) {
1748                                 wpa_printf(MSG_DEBUG, "nl80211: Local state "
1749                                            "(associated with " MACSTR ") does "
1750                                            "not match with BSS state",
1751                                            MAC2STR(drv->bssid));
1752                                 clear_state_mismatch(drv, r->bssid);
1753                                 clear_state_mismatch(drv, drv->bssid);
1754                         }
1755                 }
1756         }
1757 }
1758
1759
1760 /**
1761  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1762  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1763  * Returns: Scan results on success, -1 on failure
1764  */
1765 static struct wpa_scan_results *
1766 wpa_driver_nl80211_get_scan_results(void *priv)
1767 {
1768         struct wpa_driver_nl80211_data *drv = priv;
1769         struct nl_msg *msg;
1770         struct wpa_scan_results *res;
1771         int ret;
1772
1773         res = os_zalloc(sizeof(*res));
1774         if (res == NULL)
1775                 return NULL;
1776         msg = nlmsg_alloc();
1777         if (!msg)
1778                 goto nla_put_failure;
1779
1780         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1781                     NL80211_CMD_GET_SCAN, 0);
1782         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1783
1784         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1785         msg = NULL;
1786         if (ret == 0) {
1787                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1788                            (unsigned long) res->num);
1789                 wpa_driver_nl80211_check_bss_status(drv, res);
1790                 return res;
1791         }
1792         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1793                    "(%s)", ret, strerror(-ret));
1794 nla_put_failure:
1795         nlmsg_free(msg);
1796         wpa_scan_results_free(res);
1797         return NULL;
1798 }
1799
1800
1801 static int wpa_driver_nl80211_set_key(const char *ifname, void *priv,
1802                                       wpa_alg alg, const u8 *addr, int key_idx,
1803                                       int set_tx,
1804                                       const u8 *seq, size_t seq_len,
1805                                       const u8 *key, size_t key_len)
1806 {
1807         struct wpa_driver_nl80211_data *drv = priv;
1808         int ifindex = if_nametoindex(ifname);
1809         struct nl_msg *msg;
1810         int ret;
1811
1812         wpa_printf(MSG_DEBUG, "%s: ifindex=%d alg=%d addr=%p key_idx=%d "
1813                    "set_tx=%d seq_len=%lu key_len=%lu",
1814                    __func__, ifindex, alg, addr, key_idx, set_tx,
1815                    (unsigned long) seq_len, (unsigned long) key_len);
1816
1817         msg = nlmsg_alloc();
1818         if (!msg)
1819                 return -ENOMEM;
1820
1821         if (alg == WPA_ALG_NONE) {
1822                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1823                             0, NL80211_CMD_DEL_KEY, 0);
1824         } else {
1825                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1826                             0, NL80211_CMD_NEW_KEY, 0);
1827                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1828                 switch (alg) {
1829                 case WPA_ALG_WEP:
1830                         if (key_len == 5)
1831                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1832                                             WLAN_CIPHER_SUITE_WEP40);
1833                         else
1834                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1835                                             WLAN_CIPHER_SUITE_WEP104);
1836                         break;
1837                 case WPA_ALG_TKIP:
1838                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1839                                     WLAN_CIPHER_SUITE_TKIP);
1840                         break;
1841                 case WPA_ALG_CCMP:
1842                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1843                                     WLAN_CIPHER_SUITE_CCMP);
1844                         break;
1845                 case WPA_ALG_IGTK:
1846                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1847                                     WLAN_CIPHER_SUITE_AES_CMAC);
1848                         break;
1849                 default:
1850                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1851                                    "algorithm %d", __func__, alg);
1852                         nlmsg_free(msg);
1853                         return -1;
1854                 }
1855         }
1856
1857         if (seq && seq_len)
1858                 NLA_PUT(msg, NL80211_ATTR_KEY_SEQ, seq_len, seq);
1859
1860         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1861         {
1862                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1863                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1864         }
1865         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1866         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1867
1868         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1869         if (ret == -ENOENT && alg == WPA_ALG_NONE)
1870                 ret = 0;
1871         if (ret)
1872                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d %s)",
1873                            ret, strerror(-ret));
1874
1875         /*
1876          * If we failed or don't need to set the default TX key (below),
1877          * we're done here.
1878          */
1879         if (ret || !set_tx || alg == WPA_ALG_NONE)
1880                 return ret;
1881 #ifdef HOSTAPD /* FIX: is this needed? */
1882         if (addr)
1883                 return ret;
1884 #endif /* HOSTAPD */
1885
1886         msg = nlmsg_alloc();
1887         if (!msg)
1888                 return -ENOMEM;
1889
1890         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1891                     0, NL80211_CMD_SET_KEY, 0);
1892         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1893         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
1894         if (alg == WPA_ALG_IGTK)
1895                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
1896         else
1897                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1898
1899         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1900         if (ret == -ENOENT)
1901                 ret = 0;
1902         if (ret)
1903                 wpa_printf(MSG_DEBUG, "nl80211: set_key default failed; "
1904                            "err=%d %s)", ret, strerror(-ret));
1905         return ret;
1906
1907 nla_put_failure:
1908         return -ENOBUFS;
1909 }
1910
1911
1912 static int nl_add_key(struct nl_msg *msg, wpa_alg alg,
1913                       int key_idx, int defkey,
1914                       const u8 *seq, size_t seq_len,
1915                       const u8 *key, size_t key_len)
1916 {
1917         struct nlattr *key_attr = nla_nest_start(msg, NL80211_ATTR_KEY);
1918         if (!key_attr)
1919                 return -1;
1920
1921         if (defkey && alg == WPA_ALG_IGTK)
1922                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT_MGMT);
1923         else if (defkey)
1924                 NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
1925
1926         NLA_PUT_U8(msg, NL80211_KEY_IDX, key_idx);
1927
1928         switch (alg) {
1929         case WPA_ALG_WEP:
1930                 if (key_len == 5)
1931                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1932                                     WLAN_CIPHER_SUITE_WEP40);
1933                 else
1934                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1935                                     WLAN_CIPHER_SUITE_WEP104);
1936                 break;
1937         case WPA_ALG_TKIP:
1938                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_TKIP);
1939                 break;
1940         case WPA_ALG_CCMP:
1941                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER, WLAN_CIPHER_SUITE_CCMP);
1942                 break;
1943         case WPA_ALG_IGTK:
1944                 NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1945                             WLAN_CIPHER_SUITE_AES_CMAC);
1946                 break;
1947         default:
1948                 wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
1949                            "algorithm %d", __func__, alg);
1950                 return -1;
1951         }
1952
1953         if (seq && seq_len)
1954                 NLA_PUT(msg, NL80211_KEY_SEQ, seq_len, seq);
1955
1956         NLA_PUT(msg, NL80211_KEY_DATA, key_len, key);
1957
1958         nla_nest_end(msg, key_attr);
1959
1960         return 0;
1961  nla_put_failure:
1962         return -1;
1963 }
1964
1965
1966 static int nl80211_set_conn_keys(struct wpa_driver_associate_params *params,
1967                                  struct nl_msg *msg)
1968 {
1969         int i, privacy = 0;
1970         struct nlattr *nl_keys, *nl_key;
1971
1972         for (i = 0; i < 4; i++) {
1973                 if (!params->wep_key[i])
1974                         continue;
1975                 privacy = 1;
1976                 break;
1977         }
1978         if (!privacy)
1979                 return 0;
1980
1981         NLA_PUT_FLAG(msg, NL80211_ATTR_PRIVACY);
1982
1983         nl_keys = nla_nest_start(msg, NL80211_ATTR_KEYS);
1984         if (!nl_keys)
1985                 goto nla_put_failure;
1986
1987         for (i = 0; i < 4; i++) {
1988                 if (!params->wep_key[i])
1989                         continue;
1990
1991                 nl_key = nla_nest_start(msg, i);
1992                 if (!nl_key)
1993                         goto nla_put_failure;
1994
1995                 NLA_PUT(msg, NL80211_KEY_DATA, params->wep_key_len[i],
1996                         params->wep_key[i]);
1997                 if (params->wep_key_len[i] == 5)
1998                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
1999                                     WLAN_CIPHER_SUITE_WEP40);
2000                 else
2001                         NLA_PUT_U32(msg, NL80211_KEY_CIPHER,
2002                                     WLAN_CIPHER_SUITE_WEP104);
2003
2004                 NLA_PUT_U8(msg, NL80211_KEY_IDX, i);
2005
2006                 if (i == params->wep_tx_keyidx)
2007                         NLA_PUT_FLAG(msg, NL80211_KEY_DEFAULT);
2008
2009                 nla_nest_end(msg, nl_key);
2010         }
2011         nla_nest_end(msg, nl_keys);
2012
2013         return 0;
2014
2015 nla_put_failure:
2016         return -ENOBUFS;
2017 }
2018
2019
2020 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
2021                                    const u8 *addr, int cmd, u16 reason_code)
2022 {
2023         int ret = -1;
2024         struct nl_msg *msg;
2025
2026         msg = nlmsg_alloc();
2027         if (!msg)
2028                 return -1;
2029
2030         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
2031
2032         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2033         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
2034         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2035
2036         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2037         msg = NULL;
2038         if (ret) {
2039                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2040                            "(%s)", ret, strerror(-ret));
2041                 goto nla_put_failure;
2042         }
2043         ret = 0;
2044
2045 nla_put_failure:
2046         nlmsg_free(msg);
2047         return ret;
2048 }
2049
2050
2051 static int wpa_driver_nl80211_disconnect(struct wpa_driver_nl80211_data *drv,
2052                                          const u8 *addr, int reason_code)
2053 {
2054         wpa_printf(MSG_DEBUG, "%s", __func__);
2055         drv->associated = 0;
2056         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISCONNECT,
2057                                        reason_code);
2058 }
2059
2060
2061 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
2062                                              int reason_code)
2063 {
2064         struct wpa_driver_nl80211_data *drv = priv;
2065         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2066                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2067         wpa_printf(MSG_DEBUG, "%s", __func__);
2068         drv->associated = 0;
2069         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
2070                                        reason_code);
2071 }
2072
2073
2074 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
2075                                            int reason_code)
2076 {
2077         struct wpa_driver_nl80211_data *drv = priv;
2078         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME))
2079                 return wpa_driver_nl80211_disconnect(drv, addr, reason_code);
2080         wpa_printf(MSG_DEBUG, "%s", __func__);
2081         drv->associated = 0;
2082         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
2083                                        reason_code);
2084 }
2085
2086
2087 static int wpa_driver_nl80211_authenticate(
2088         void *priv, struct wpa_driver_auth_params *params)
2089 {
2090         struct wpa_driver_nl80211_data *drv = priv;
2091         int ret = -1, i;
2092         struct nl_msg *msg;
2093         enum nl80211_auth_type type;
2094         int count = 0;
2095
2096         drv->associated = 0;
2097         os_memset(drv->auth_bssid, 0, ETH_ALEN);
2098
2099         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_INFRA) < 0)
2100                 return -1;
2101
2102 retry:
2103         msg = nlmsg_alloc();
2104         if (!msg)
2105                 return -1;
2106
2107         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
2108                    drv->ifindex);
2109
2110         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2111                     NL80211_CMD_AUTHENTICATE, 0);
2112
2113         for (i = 0; i < 4; i++) {
2114                 if (!params->wep_key[i])
2115                         continue;
2116                 wpa_driver_nl80211_set_key(drv->ifname, drv, WPA_ALG_WEP, NULL,
2117                                            i,
2118                                            i == params->wep_tx_keyidx, NULL, 0,
2119                                            params->wep_key[i],
2120                                            params->wep_key_len[i]);
2121                 if (params->wep_tx_keyidx != i)
2122                         continue;
2123                 if (nl_add_key(msg, WPA_ALG_WEP, i, 1, NULL, 0,
2124                                params->wep_key[i], params->wep_key_len[i])) {
2125                         nlmsg_free(msg);
2126                         return -1;
2127                 }
2128         }
2129
2130         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2131         if (params->bssid) {
2132                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2133                            MAC2STR(params->bssid));
2134                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2135         }
2136         if (params->freq) {
2137                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2138                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2139         }
2140         if (params->ssid) {
2141                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2142                                   params->ssid, params->ssid_len);
2143                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2144                         params->ssid);
2145         }
2146         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
2147         if (params->ie)
2148                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
2149         /*
2150          * TODO: if multiple auth_alg options enabled, try them one by one if
2151          * the AP rejects authentication due to unknown auth alg
2152          */
2153         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
2154                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
2155         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
2156                 type = NL80211_AUTHTYPE_SHARED_KEY;
2157         else if (params->auth_alg & AUTH_ALG_LEAP)
2158                 type = NL80211_AUTHTYPE_NETWORK_EAP;
2159         else if (params->auth_alg & AUTH_ALG_FT)
2160                 type = NL80211_AUTHTYPE_FT;
2161         else
2162                 goto nla_put_failure;
2163         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
2164         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
2165
2166         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2167         msg = NULL;
2168         if (ret) {
2169                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2170                            "(%s)", ret, strerror(-ret));
2171                 count++;
2172                 if (ret == -EALREADY && count == 1 && params->bssid) {
2173                         /*
2174                          * mac80211 does not currently accept new
2175                          * authentication if we are already authenticated. As a
2176                          * workaround, force deauthentication and try again.
2177                          */
2178                         wpa_printf(MSG_DEBUG, "nl80211: Retry authentication "
2179                                    "after forced deauthentication");
2180                         wpa_driver_nl80211_deauthenticate(
2181                                 drv, params->bssid,
2182                                 WLAN_REASON_PREV_AUTH_NOT_VALID);
2183                         nlmsg_free(msg);
2184                         goto retry;
2185                 }
2186                 goto nla_put_failure;
2187         }
2188         ret = 0;
2189         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
2190                    "successfully");
2191
2192 nla_put_failure:
2193         nlmsg_free(msg);
2194         return ret;
2195 }
2196
2197
2198 struct phy_info_arg {
2199         u16 *num_modes;
2200         struct hostapd_hw_modes *modes;
2201 };
2202
2203 static int phy_info_handler(struct nl_msg *msg, void *arg)
2204 {
2205         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
2206         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2207         struct phy_info_arg *phy_info = arg;
2208
2209         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
2210
2211         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
2212         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
2213                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
2214                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
2215                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
2216                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
2217                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
2218                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
2219         };
2220
2221         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
2222         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
2223                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
2224                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
2225         };
2226
2227         struct nlattr *nl_band;
2228         struct nlattr *nl_freq;
2229         struct nlattr *nl_rate;
2230         int rem_band, rem_freq, rem_rate;
2231         struct hostapd_hw_modes *mode;
2232         int idx, mode_is_set;
2233
2234         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2235                   genlmsg_attrlen(gnlh, 0), NULL);
2236
2237         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
2238                 return NL_SKIP;
2239
2240         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
2241                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
2242                 if (!mode)
2243                         return NL_SKIP;
2244                 phy_info->modes = mode;
2245
2246                 mode_is_set = 0;
2247
2248                 mode = &phy_info->modes[*(phy_info->num_modes)];
2249                 memset(mode, 0, sizeof(*mode));
2250                 *(phy_info->num_modes) += 1;
2251
2252                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
2253                           nla_len(nl_band), NULL);
2254
2255                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
2256                         mode->ht_capab = nla_get_u16(
2257                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
2258                 }
2259
2260                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) {
2261                         mode->a_mpdu_params |= nla_get_u8(
2262                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_FACTOR]) &
2263                                 0x03;
2264                 }
2265
2266                 if (tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) {
2267                         mode->a_mpdu_params |= nla_get_u8(
2268                                 tb_band[NL80211_BAND_ATTR_HT_AMPDU_DENSITY]) <<
2269                                 2;
2270                 }
2271
2272                 if (tb_band[NL80211_BAND_ATTR_HT_MCS_SET] &&
2273                     nla_len(tb_band[NL80211_BAND_ATTR_HT_MCS_SET])) {
2274                         u8 *mcs;
2275                         mcs = nla_data(tb_band[NL80211_BAND_ATTR_HT_MCS_SET]);
2276                         os_memcpy(mode->mcs_set, mcs, 16);
2277                 }
2278
2279                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2280                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2281                                   nla_len(nl_freq), freq_policy);
2282                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2283                                 continue;
2284                         mode->num_channels++;
2285                 }
2286
2287                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
2288                 if (!mode->channels)
2289                         return NL_SKIP;
2290
2291                 idx = 0;
2292
2293                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
2294                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
2295                                   nla_len(nl_freq), freq_policy);
2296                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
2297                                 continue;
2298
2299                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
2300                         mode->channels[idx].flag = 0;
2301
2302                         if (!mode_is_set) {
2303                                 /* crude heuristic */
2304                                 if (mode->channels[idx].freq < 4000)
2305                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
2306                                 else
2307                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
2308                                 mode_is_set = 1;
2309                         }
2310
2311                         /* crude heuristic */
2312                         if (mode->channels[idx].freq < 4000)
2313                                 if (mode->channels[idx].freq == 2484)
2314                                         mode->channels[idx].chan = 14;
2315                                 else
2316                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
2317                         else
2318                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
2319
2320                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2321                                 mode->channels[idx].flag |=
2322                                         HOSTAPD_CHAN_DISABLED;
2323                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
2324                                 mode->channels[idx].flag |=
2325                                         HOSTAPD_CHAN_PASSIVE_SCAN;
2326                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
2327                                 mode->channels[idx].flag |=
2328                                         HOSTAPD_CHAN_NO_IBSS;
2329                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
2330                                 mode->channels[idx].flag |=
2331                                         HOSTAPD_CHAN_RADAR;
2332
2333                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
2334                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
2335                                 mode->channels[idx].max_tx_power =
2336                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
2337
2338                         idx++;
2339                 }
2340
2341                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2342                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2343                                   nla_len(nl_rate), rate_policy);
2344                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2345                                 continue;
2346                         mode->num_rates++;
2347                 }
2348
2349                 mode->rates = calloc(mode->num_rates, sizeof(int));
2350                 if (!mode->rates)
2351                         return NL_SKIP;
2352
2353                 idx = 0;
2354
2355                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
2356                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
2357                                   nla_len(nl_rate), rate_policy);
2358                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
2359                                 continue;
2360                         mode->rates[idx] = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
2361
2362                         /* crude heuristic */
2363                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
2364                             mode->rates[idx] > 200)
2365                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
2366
2367                         idx++;
2368                 }
2369         }
2370
2371         return NL_SKIP;
2372 }
2373
2374 static struct hostapd_hw_modes *
2375 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
2376 {
2377         u16 m;
2378         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
2379         int i, mode11g_idx = -1;
2380
2381         /* If only 802.11g mode is included, use it to construct matching
2382          * 802.11b mode data. */
2383
2384         for (m = 0; m < *num_modes; m++) {
2385                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
2386                         return modes; /* 802.11b already included */
2387                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
2388                         mode11g_idx = m;
2389         }
2390
2391         if (mode11g_idx < 0)
2392                 return modes; /* 2.4 GHz band not supported at all */
2393
2394         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
2395         if (nmodes == NULL)
2396                 return modes; /* Could not add 802.11b mode */
2397
2398         mode = &nmodes[*num_modes];
2399         os_memset(mode, 0, sizeof(*mode));
2400         (*num_modes)++;
2401         modes = nmodes;
2402
2403         mode->mode = HOSTAPD_MODE_IEEE80211B;
2404
2405         mode11g = &modes[mode11g_idx];
2406         mode->num_channels = mode11g->num_channels;
2407         mode->channels = os_malloc(mode11g->num_channels *
2408                                    sizeof(struct hostapd_channel_data));
2409         if (mode->channels == NULL) {
2410                 (*num_modes)--;
2411                 return modes; /* Could not add 802.11b mode */
2412         }
2413         os_memcpy(mode->channels, mode11g->channels,
2414                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
2415
2416         mode->num_rates = 0;
2417         mode->rates = os_malloc(4 * sizeof(int));
2418         if (mode->rates == NULL) {
2419                 os_free(mode->channels);
2420                 (*num_modes)--;
2421                 return modes; /* Could not add 802.11b mode */
2422         }
2423
2424         for (i = 0; i < mode11g->num_rates; i++) {
2425                 if (mode11g->rates[i] != 10 && mode11g->rates[i] != 20 &&
2426                     mode11g->rates[i] != 55 && mode11g->rates[i] != 110)
2427                         continue;
2428                 mode->rates[mode->num_rates] = mode11g->rates[i];
2429                 mode->num_rates++;
2430                 if (mode->num_rates == 4)
2431                         break;
2432         }
2433
2434         if (mode->num_rates == 0) {
2435                 os_free(mode->channels);
2436                 os_free(mode->rates);
2437                 (*num_modes)--;
2438                 return modes; /* No 802.11b rates */
2439         }
2440
2441         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
2442                    "information");
2443
2444         return modes;
2445 }
2446
2447
2448 static struct hostapd_hw_modes *
2449 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
2450 {
2451         struct wpa_driver_nl80211_data *drv = priv;
2452         struct nl_msg *msg;
2453         struct phy_info_arg result = {
2454                 .num_modes = num_modes,
2455                 .modes = NULL,
2456         };
2457
2458         *num_modes = 0;
2459         *flags = 0;
2460
2461         msg = nlmsg_alloc();
2462         if (!msg)
2463                 return NULL;
2464
2465         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2466                     0, NL80211_CMD_GET_WIPHY, 0);
2467
2468         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2469
2470         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
2471                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
2472  nla_put_failure:
2473         return NULL;
2474 }
2475
2476
2477 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
2478                                          const void *data, size_t len,
2479                                          int encrypt)
2480 {
2481         __u8 rtap_hdr[] = {
2482                 0x00, 0x00, /* radiotap version */
2483                 0x0e, 0x00, /* radiotap length */
2484                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
2485                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
2486                 0x00,       /* padding */
2487                 0x00, 0x00, /* RX and TX flags to indicate that */
2488                 0x00, 0x00, /* this is the injected frame directly */
2489         };
2490         struct iovec iov[2] = {
2491                 {
2492                         .iov_base = &rtap_hdr,
2493                         .iov_len = sizeof(rtap_hdr),
2494                 },
2495                 {
2496                         .iov_base = (void *) data,
2497                         .iov_len = len,
2498                 }
2499         };
2500         struct msghdr msg = {
2501                 .msg_name = NULL,
2502                 .msg_namelen = 0,
2503                 .msg_iov = iov,
2504                 .msg_iovlen = 2,
2505                 .msg_control = NULL,
2506                 .msg_controllen = 0,
2507                 .msg_flags = 0,
2508         };
2509
2510         if (encrypt)
2511                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
2512
2513         return sendmsg(drv->monitor_sock, &msg, 0);
2514 }
2515
2516
2517 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
2518                                         size_t data_len)
2519 {
2520         struct wpa_driver_nl80211_data *drv = priv;
2521         struct ieee80211_mgmt *mgmt;
2522         int encrypt = 1;
2523         u16 fc;
2524
2525         mgmt = (struct ieee80211_mgmt *) data;
2526         fc = le_to_host16(mgmt->frame_control);
2527
2528         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
2529             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
2530                 /*
2531                  * Only one of the authentication frame types is encrypted.
2532                  * In order for static WEP encryption to work properly (i.e.,
2533                  * to not encrypt the frame), we need to tell mac80211 about
2534                  * the frames that must not be encrypted.
2535                  */
2536                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
2537                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
2538                 if (auth_alg != WLAN_AUTH_SHARED_KEY || auth_trans != 3)
2539                         encrypt = 0;
2540         }
2541
2542         return wpa_driver_nl80211_send_frame(drv, data, data_len, encrypt);
2543 }
2544
2545
2546 static int wpa_driver_nl80211_set_beacon(const char *ifname, void *priv,
2547                                          const u8 *head, size_t head_len,
2548                                          const u8 *tail, size_t tail_len,
2549                                          int dtim_period, int beacon_int)
2550 {
2551         struct wpa_driver_nl80211_data *drv = priv;
2552         struct nl_msg *msg;
2553         u8 cmd = NL80211_CMD_NEW_BEACON;
2554         int ret;
2555         int beacon_set;
2556         int ifindex = if_nametoindex(ifname);
2557 #ifdef HOSTAPD
2558         struct i802_bss *bss;
2559
2560         bss = get_bss(drv, ifindex);
2561         if (bss == NULL)
2562                 return -ENOENT;
2563         beacon_set = bss->beacon_set;
2564 #else /* HOSTAPD */
2565         beacon_set = drv->beacon_set;
2566 #endif /* HOSTAPD */
2567
2568         msg = nlmsg_alloc();
2569         if (!msg)
2570                 return -ENOMEM;
2571
2572         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
2573                    beacon_set);
2574         if (beacon_set)
2575                 cmd = NL80211_CMD_SET_BEACON;
2576
2577         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2578                     0, cmd, 0);
2579         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
2580         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
2581         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2582         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, beacon_int);
2583         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
2584
2585         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2586         if (ret) {
2587                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
2588                            ret, strerror(-ret));
2589         } else {
2590 #ifdef HOSTAPD
2591                 bss->beacon_set = 1;
2592 #else /* HOSTAPD */
2593                 drv->beacon_set = 1;
2594 #endif /* HOSTAPD */
2595         }
2596         return ret;
2597  nla_put_failure:
2598         return -ENOBUFS;
2599 }
2600
2601
2602 static int wpa_driver_nl80211_set_freq(struct wpa_driver_nl80211_data *drv,
2603                                        int freq, int ht_enabled,
2604                                        int sec_channel_offset)
2605 {
2606         struct nl_msg *msg;
2607         int ret;
2608
2609         msg = nlmsg_alloc();
2610         if (!msg)
2611                 return -1;
2612
2613         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2614                     NL80211_CMD_SET_WIPHY, 0);
2615
2616         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2617         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq);
2618         if (ht_enabled) {
2619                 switch (sec_channel_offset) {
2620                 case -1:
2621                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2622                                     NL80211_CHAN_HT40MINUS);
2623                         break;
2624                 case 1:
2625                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2626                                     NL80211_CHAN_HT40PLUS);
2627                         break;
2628                 default:
2629                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
2630                                     NL80211_CHAN_HT20);
2631                         break;
2632                 }
2633         }
2634
2635         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2636         if (ret == 0)
2637                 return 0;
2638         wpa_printf(MSG_DEBUG, "nl80211: Failed to set channel (freq=%d): "
2639                    "%d (%s)", freq, ret, strerror(-ret));
2640 nla_put_failure:
2641         return -1;
2642 }
2643
2644
2645 static int wpa_driver_nl80211_sta_add(const char *ifname, void *priv,
2646                                       struct hostapd_sta_add_params *params)
2647 {
2648         struct wpa_driver_nl80211_data *drv = priv;
2649         struct nl_msg *msg;
2650         int ret = -ENOBUFS;
2651
2652         msg = nlmsg_alloc();
2653         if (!msg)
2654                 return -ENOMEM;
2655
2656         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2657                     0, NL80211_CMD_NEW_STATION, 0);
2658
2659         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(ifname));
2660         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
2661         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
2662         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
2663                 params->supp_rates);
2664         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
2665                     params->listen_interval);
2666         if (params->ht_capabilities) {
2667                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
2668                         sizeof(*params->ht_capabilities),
2669                         params->ht_capabilities);
2670         }
2671
2672         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2673         if (ret)
2674                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
2675                            "result: %d (%s)", ret, strerror(-ret));
2676         if (ret == -EEXIST)
2677                 ret = 0;
2678  nla_put_failure:
2679         return ret;
2680 }
2681
2682
2683 static int wpa_driver_nl80211_sta_remove(void *priv, const u8 *addr)
2684 {
2685         struct wpa_driver_nl80211_data *drv = priv;
2686         struct nl_msg *msg;
2687         int ret;
2688
2689         msg = nlmsg_alloc();
2690         if (!msg)
2691                 return -ENOMEM;
2692
2693         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2694                     0, NL80211_CMD_DEL_STATION, 0);
2695
2696         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
2697                     if_nametoindex(drv->ifname));
2698         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2699
2700         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2701         if (ret == -ENOENT)
2702                 return 0;
2703         return ret;
2704  nla_put_failure:
2705         return -ENOBUFS;
2706 }
2707
2708
2709 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2710                                  int ifidx)
2711 {
2712         struct nl_msg *msg;
2713
2714 #ifdef HOSTAPD
2715         /* stop listening for EAPOL on this interface */
2716         del_ifidx(drv, ifidx);
2717 #endif /* HOSTAPD */
2718
2719         msg = nlmsg_alloc();
2720         if (!msg)
2721                 goto nla_put_failure;
2722
2723         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2724                     0, NL80211_CMD_DEL_INTERFACE, 0);
2725         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2726
2727         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2728                 return;
2729  nla_put_failure:
2730         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2731                    ifidx);
2732 }
2733
2734
2735 static int nl80211_create_iface_once(struct wpa_driver_nl80211_data *drv,
2736                                      const char *ifname,
2737                                      enum nl80211_iftype iftype,
2738                                      const u8 *addr)
2739 {
2740         struct nl_msg *msg, *flags = NULL;
2741         int ifidx;
2742         int ret = -ENOBUFS;
2743
2744         msg = nlmsg_alloc();
2745         if (!msg)
2746                 return -1;
2747
2748         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2749                     0, NL80211_CMD_NEW_INTERFACE, 0);
2750         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2751         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2752         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2753
2754         if (iftype == NL80211_IFTYPE_MONITOR) {
2755                 int err;
2756
2757                 flags = nlmsg_alloc();
2758                 if (!flags)
2759                         goto nla_put_failure;
2760
2761                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2762
2763                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2764
2765                 nlmsg_free(flags);
2766
2767                 if (err)
2768                         goto nla_put_failure;
2769         }
2770
2771         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2772         if (ret) {
2773  nla_put_failure:
2774                 wpa_printf(MSG_ERROR, "Failed to create interface %s: %d (%s)",
2775                            ifname, ret, strerror(-ret));
2776                 return ret;
2777         }
2778
2779         ifidx = if_nametoindex(ifname);
2780
2781         if (ifidx <= 0)
2782                 return -1;
2783
2784 #ifdef HOSTAPD
2785         /* start listening for EAPOL on this interface */
2786         add_ifidx(drv, ifidx);
2787
2788         if (addr && iftype == NL80211_IFTYPE_AP &&
2789             set_ifhwaddr(drv, ifname, addr)) {
2790                 nl80211_remove_iface(drv, ifidx);
2791                 return -1;
2792         }
2793 #endif /* HOSTAPD */
2794
2795         return ifidx;
2796 }
2797
2798
2799 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2800                                 const char *ifname, enum nl80211_iftype iftype,
2801                                 const u8 *addr)
2802 {
2803         int ret;
2804
2805         ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2806
2807         /* if error occured and interface exists already */
2808         if (ret == -ENFILE && if_nametoindex(ifname)) {
2809                 wpa_printf(MSG_INFO, "Try to remove and re-create %s", ifname);
2810
2811                 /* Try to remove the interface that was already there. */
2812                 nl80211_remove_iface(drv, if_nametoindex(ifname));
2813
2814                 /* Try to create the interface again */
2815                 ret = nl80211_create_iface_once(drv, ifname, iftype, addr);
2816         }
2817
2818         return ret;
2819 }
2820
2821
2822 #ifdef CONFIG_AP
2823
2824 void ap_tx_status(void *ctx, const u8 *addr,
2825                   const u8 *buf, size_t len, int ack);
2826 void ap_rx_from_unknown_sta(void *ctx, struct ieee80211_hdr *hdr, size_t len);
2827 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2828                 struct hostapd_frame_info *fi);
2829 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2830
2831 #endif /* CONFIG_AP */
2832
2833
2834 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2835 {
2836         struct ieee80211_hdr *hdr;
2837         u16 fc, type, stype;
2838
2839         hdr = (struct ieee80211_hdr *) buf;
2840         fc = le_to_host16(hdr->frame_control);
2841
2842         type = WLAN_FC_GET_TYPE(fc);
2843         stype = WLAN_FC_GET_STYPE(fc);
2844
2845         switch (type) {
2846         case WLAN_FC_TYPE_MGMT:
2847                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2848                            ok ? "ACK" : "fail");
2849 #ifdef HOSTAPD
2850                 hostapd_mgmt_tx_cb(ctx, buf, len, stype, ok);
2851 #elif CONFIG_AP
2852                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2853 #endif
2854                 break;
2855         case WLAN_FC_TYPE_CTRL:
2856                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2857                            ok ? "ACK" : "fail");
2858                 break;
2859         case WLAN_FC_TYPE_DATA:
2860 #ifdef HOSTAPD
2861                 hostapd_tx_status(ctx, hdr->addr1, buf, len, ok);
2862 #elif CONFIG_AP
2863                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2864 #endif
2865                 break;
2866         default:
2867                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2868                            type);
2869                 break;
2870         }
2871 }
2872
2873
2874 static void from_unknown_sta(struct wpa_driver_nl80211_data *drv,
2875                              struct ieee80211_hdr *hdr, size_t len)
2876 {
2877 #ifdef HOSTAPD
2878         hostapd_rx_from_unknown_sta(drv->ctx, hdr, len);
2879 #elif CONFIG_AP
2880         ap_rx_from_unknown_sta(drv->ctx, hdr, len);
2881 #endif
2882 }
2883
2884
2885 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2886                          u8 *buf, size_t len,
2887                          struct hostapd_frame_info *hfi)
2888 {
2889         struct ieee80211_hdr *hdr;
2890         u16 fc, stype;
2891
2892         hdr = (struct ieee80211_hdr *) buf;
2893         fc = le_to_host16(hdr->frame_control);
2894         stype = WLAN_FC_GET_STYPE(fc);
2895
2896         switch (WLAN_FC_GET_TYPE(fc)) {
2897         case WLAN_FC_TYPE_MGMT:
2898                 if (stype != WLAN_FC_STYPE_BEACON &&
2899                     stype != WLAN_FC_STYPE_PROBE_REQ)
2900                         wpa_printf(MSG_MSGDUMP, "MGMT");
2901 #ifdef HOSTAPD
2902                 hostapd_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2903 #elif CONFIG_AP
2904                 ap_mgmt_rx(drv->ctx, buf, len, stype, hfi);
2905 #endif
2906                 break;
2907         case WLAN_FC_TYPE_CTRL:
2908                 /* can only get here with PS-Poll frames */
2909                 wpa_printf(MSG_DEBUG, "CTRL");
2910                 from_unknown_sta(drv, hdr, len);
2911                 break;
2912         case WLAN_FC_TYPE_DATA:
2913                 from_unknown_sta(drv, hdr, len);
2914                 break;
2915         }
2916 }
2917
2918
2919 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2920 {
2921         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2922         int len;
2923         unsigned char buf[3000];
2924         struct ieee80211_radiotap_iterator iter;
2925         int ret;
2926         struct hostapd_frame_info hfi;
2927         int injected = 0, failed = 0, rxflags = 0;
2928
2929         len = recv(sock, buf, sizeof(buf), 0);
2930         if (len < 0) {
2931                 perror("recv");
2932                 return;
2933         }
2934
2935         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2936                 printf("received invalid radiotap frame\n");
2937                 return;
2938         }
2939
2940         memset(&hfi, 0, sizeof(hfi));
2941
2942         while (1) {
2943                 ret = ieee80211_radiotap_iterator_next(&iter);
2944                 if (ret == -ENOENT)
2945                         break;
2946                 if (ret) {
2947                         printf("received invalid radiotap frame (%d)\n", ret);
2948                         return;
2949                 }
2950                 switch (iter.this_arg_index) {
2951                 case IEEE80211_RADIOTAP_FLAGS:
2952                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2953                                 len -= 4;
2954                         break;
2955                 case IEEE80211_RADIOTAP_RX_FLAGS:
2956                         rxflags = 1;
2957                         break;
2958                 case IEEE80211_RADIOTAP_TX_FLAGS:
2959                         injected = 1;
2960                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2961                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2962                         break;
2963                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2964                         break;
2965                 case IEEE80211_RADIOTAP_CHANNEL:
2966                         /* TODO convert from freq/flags to channel number
2967                         hfi.channel = XXX;
2968                          */
2969                         break;
2970                 case IEEE80211_RADIOTAP_RATE:
2971                         hfi.datarate = *iter.this_arg * 5;
2972                         break;
2973                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2974                         hfi.ssi_signal = *iter.this_arg;
2975                         break;
2976                 }
2977         }
2978
2979         if (rxflags && injected)
2980                 return;
2981
2982         if (!injected)
2983                 handle_frame(drv, buf + iter.max_length,
2984                              len - iter.max_length, &hfi);
2985         else
2986                 handle_tx_callback(drv->ctx, buf + iter.max_length,
2987                                    len - iter.max_length, !failed);
2988 }
2989
2990
2991 /*
2992  * we post-process the filter code later and rewrite
2993  * this to the offset to the last instruction
2994  */
2995 #define PASS    0xFF
2996 #define FAIL    0xFE
2997
2998 static struct sock_filter msock_filter_insns[] = {
2999         /*
3000          * do a little-endian load of the radiotap length field
3001          */
3002         /* load lower byte into A */
3003         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
3004         /* put it into X (== index register) */
3005         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3006         /* load upper byte into A */
3007         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
3008         /* left-shift it by 8 */
3009         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
3010         /* or with X */
3011         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
3012         /* put result into X */
3013         BPF_STMT(BPF_MISC| BPF_TAX, 0),
3014
3015         /*
3016          * Allow management frames through, this also gives us those
3017          * management frames that we sent ourselves with status
3018          */
3019         /* load the lower byte of the IEEE 802.11 frame control field */
3020         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
3021         /* mask off frame type and version */
3022         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
3023         /* accept frame if it's both 0, fall through otherwise */
3024         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
3025
3026         /*
3027          * TODO: add a bit to radiotap RX flags that indicates
3028          * that the sending station is not associated, then
3029          * add a filter here that filters on our DA and that flag
3030          * to allow us to deauth frames to that bad station.
3031          *
3032          * Not a regression -- we didn't do it before either.
3033          */
3034
3035 #if 0
3036         /*
3037          * drop non-data frames, WDS frames
3038          */
3039         /* load the lower byte of the frame control field */
3040         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3041         /* mask off QoS bit */
3042         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
3043         /* drop non-data frames */
3044         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
3045         /* load the upper byte of the frame control field */
3046         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3047         /* mask off toDS/fromDS */
3048         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
3049         /* drop WDS frames */
3050         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
3051 #endif
3052
3053         /*
3054          * add header length to index
3055          */
3056         /* load the lower byte of the frame control field */
3057         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
3058         /* mask off QoS bit */
3059         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
3060         /* right shift it by 6 to give 0 or 2 */
3061         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
3062         /* add data frame header length */
3063         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
3064         /* add index, was start of 802.11 header */
3065         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
3066         /* move to index, now start of LL header */
3067         BPF_STMT(BPF_MISC | BPF_TAX, 0),
3068
3069         /*
3070          * Accept empty data frames, we use those for
3071          * polling activity.
3072          */
3073         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
3074         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
3075
3076         /*
3077          * Accept EAPOL frames
3078          */
3079         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
3080         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
3081         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
3082         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
3083
3084         /* keep these last two statements or change the code below */
3085         /* return 0 == "DROP" */
3086         BPF_STMT(BPF_RET | BPF_K, 0),
3087         /* return ~0 == "keep all" */
3088         BPF_STMT(BPF_RET | BPF_K, ~0),
3089 };
3090
3091 static struct sock_fprog msock_filter = {
3092         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
3093         .filter = msock_filter_insns,
3094 };
3095
3096
3097 static int add_monitor_filter(int s)
3098 {
3099         int idx;
3100
3101         /* rewrite all PASS/FAIL jump offsets */
3102         for (idx = 0; idx < msock_filter.len; idx++) {
3103                 struct sock_filter *insn = &msock_filter_insns[idx];
3104
3105                 if (BPF_CLASS(insn->code) == BPF_JMP) {
3106                         if (insn->code == (BPF_JMP|BPF_JA)) {
3107                                 if (insn->k == PASS)
3108                                         insn->k = msock_filter.len - idx - 2;
3109                                 else if (insn->k == FAIL)
3110                                         insn->k = msock_filter.len - idx - 3;
3111                         }
3112
3113                         if (insn->jt == PASS)
3114                                 insn->jt = msock_filter.len - idx - 2;
3115                         else if (insn->jt == FAIL)
3116                                 insn->jt = msock_filter.len - idx - 3;
3117
3118                         if (insn->jf == PASS)
3119                                 insn->jf = msock_filter.len - idx - 2;
3120                         else if (insn->jf == FAIL)
3121                                 insn->jf = msock_filter.len - idx - 3;
3122                 }
3123         }
3124
3125         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
3126                        &msock_filter, sizeof(msock_filter))) {
3127                 perror("SO_ATTACH_FILTER");
3128                 return -1;
3129         }
3130
3131         return 0;
3132 }
3133
3134
3135 static void nl80211_remove_monitor_interface(
3136         struct wpa_driver_nl80211_data *drv)
3137 {
3138         if (drv->monitor_ifidx >= 0) {
3139                 nl80211_remove_iface(drv, drv->monitor_ifidx);
3140                 drv->monitor_ifidx = -1;
3141         }
3142 }
3143
3144
3145 static int
3146 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
3147 {
3148         char buf[IFNAMSIZ];
3149         struct sockaddr_ll ll;
3150         int optval;
3151         socklen_t optlen;
3152
3153         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
3154         buf[IFNAMSIZ - 1] = '\0';
3155
3156         drv->monitor_ifidx =
3157                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
3158
3159         if (drv->monitor_ifidx < 0)
3160                 return -1;
3161
3162         if (hostapd_set_iface_flags(drv, buf, 1))
3163                 goto error;
3164
3165         memset(&ll, 0, sizeof(ll));
3166         ll.sll_family = AF_PACKET;
3167         ll.sll_ifindex = drv->monitor_ifidx;
3168         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
3169         if (drv->monitor_sock < 0) {
3170                 perror("socket[PF_PACKET,SOCK_RAW]");
3171                 goto error;
3172         }
3173
3174         if (add_monitor_filter(drv->monitor_sock)) {
3175                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
3176                            "interface; do filtering in user space");
3177                 /* This works, but will cost in performance. */
3178         }
3179
3180         if (bind(drv->monitor_sock, (struct sockaddr *) &ll, sizeof(ll)) < 0) {
3181                 perror("monitor socket bind");
3182                 goto error;
3183         }
3184
3185         optlen = sizeof(optval);
3186         optval = 20;
3187         if (setsockopt
3188             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
3189                 perror("Failed to set socket priority");
3190                 goto error;
3191         }
3192
3193         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
3194                                      drv, NULL)) {
3195                 printf("Could not register monitor read socket\n");
3196                 goto error;
3197         }
3198
3199         return 0;
3200  error:
3201         nl80211_remove_monitor_interface(drv);
3202         return -1;
3203 }
3204
3205
3206 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
3207
3208 static int wpa_driver_nl80211_hapd_send_eapol(
3209         void *priv, const u8 *addr, const u8 *data,
3210         size_t data_len, int encrypt, const u8 *own_addr)
3211 {
3212         struct wpa_driver_nl80211_data *drv = priv;
3213         struct ieee80211_hdr *hdr;
3214         size_t len;
3215         u8 *pos;
3216         int res;
3217 #if 0 /* FIX */
3218         int qos = sta->flags & WPA_STA_WMM;
3219 #else
3220         int qos = 0;
3221 #endif
3222
3223         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3224                 data_len;
3225         hdr = os_zalloc(len);
3226         if (hdr == NULL) {
3227                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3228                        (unsigned long) len);
3229                 return -1;
3230         }
3231
3232         hdr->frame_control =
3233                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3234         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3235         if (encrypt)
3236                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3237 #if 0 /* To be enabled if qos determination is added above */
3238         if (qos) {
3239                 hdr->frame_control |=
3240                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3241         }
3242 #endif
3243
3244         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3245         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3246         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3247         pos = (u8 *) (hdr + 1);
3248
3249 #if 0 /* To be enabled if qos determination is added above */
3250         if (qos) {
3251                 /* add an empty QoS header if needed */
3252                 pos[0] = 0;
3253                 pos[1] = 0;
3254                 pos += 2;
3255         }
3256 #endif
3257
3258         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3259         pos += sizeof(rfc1042_header);
3260         WPA_PUT_BE16(pos, ETH_P_PAE);
3261         pos += 2;
3262         memcpy(pos, data, data_len);
3263
3264         res = wpa_driver_nl80211_send_frame(drv, (u8 *) hdr, len, encrypt);
3265         if (res < 0) {
3266                 wpa_printf(MSG_ERROR, "i802_send_eapol - packet len: %lu - "
3267                            "failed: %d (%s)",
3268                            (unsigned long) len, errno, strerror(errno));
3269         }
3270         free(hdr);
3271
3272         return res;
3273 }
3274
3275
3276 static u32 sta_flags_nl80211(int flags)
3277 {
3278         u32 f = 0;
3279
3280         if (flags & WPA_STA_AUTHORIZED)
3281                 f |= BIT(NL80211_STA_FLAG_AUTHORIZED);
3282         if (flags & WPA_STA_WMM)
3283                 f |= BIT(NL80211_STA_FLAG_WME);
3284         if (flags & WPA_STA_SHORT_PREAMBLE)
3285                 f |= BIT(NL80211_STA_FLAG_SHORT_PREAMBLE);
3286         if (flags & WPA_STA_MFP)
3287                 f |= BIT(NL80211_STA_FLAG_MFP);
3288
3289         return f;
3290 }
3291
3292
3293 static int wpa_driver_nl80211_sta_set_flags(void *priv, const u8 *addr,
3294                                             int total_flags, int flags_or,
3295                                             int flags_and)
3296 {
3297         struct wpa_driver_nl80211_data *drv = priv;
3298         struct nl_msg *msg, *flags = NULL;
3299         struct nl80211_sta_flag_update upd;
3300
3301         msg = nlmsg_alloc();
3302         if (!msg)
3303                 return -ENOMEM;
3304
3305         flags = nlmsg_alloc();
3306         if (!flags) {
3307                 nlmsg_free(msg);
3308                 return -ENOMEM;
3309         }
3310
3311         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3312                     0, NL80211_CMD_SET_STATION, 0);
3313
3314         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3315                     if_nametoindex(drv->ifname));
3316         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3317
3318         /*
3319          * Backwards compatibility version using NL80211_ATTR_STA_FLAGS. This
3320          * can be removed eventually.
3321          */
3322         if (total_flags & WPA_STA_AUTHORIZED)
3323                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3324
3325         if (total_flags & WPA_STA_WMM)
3326                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3327
3328         if (total_flags & WPA_STA_SHORT_PREAMBLE)
3329                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3330
3331         if (total_flags & WPA_STA_MFP)
3332                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3333
3334         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3335                 goto nla_put_failure;
3336
3337         os_memset(&upd, 0, sizeof(upd));
3338         upd.mask = sta_flags_nl80211(flags_or | ~flags_and);
3339         upd.set = sta_flags_nl80211(flags_or);
3340         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3341
3342         nlmsg_free(flags);
3343
3344         return send_and_recv_msgs(drv, msg, NULL, NULL);
3345  nla_put_failure:
3346         nlmsg_free(flags);
3347         return -ENOBUFS;
3348 }
3349
3350
3351 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
3352                                  struct wpa_driver_associate_params *params)
3353 {
3354         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
3355             wpa_driver_nl80211_set_freq(drv, params->freq, 0, 0)) {
3356                 nl80211_remove_monitor_interface(drv);
3357                 return -1;
3358         }
3359
3360         /* TODO: setup monitor interface (and add code somewhere to remove this
3361          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
3362
3363         return 0;
3364 }
3365
3366
3367 static int nl80211_leave_ibss(struct wpa_driver_nl80211_data *drv)
3368 {
3369         struct nl_msg *msg;
3370         int ret = -1;
3371
3372         msg = nlmsg_alloc();
3373         if (!msg)
3374                 return -1;
3375
3376         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3377                     NL80211_CMD_LEAVE_IBSS, 0);
3378         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3379         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3380         msg = NULL;
3381         if (ret) {
3382                 wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS failed: ret=%d "
3383                            "(%s)", ret, strerror(-ret));
3384                 goto nla_put_failure;
3385         }
3386
3387         ret = 0;
3388         wpa_printf(MSG_DEBUG, "nl80211: Leave IBSS request sent successfully");
3389
3390 nla_put_failure:
3391         nlmsg_free(msg);
3392         return ret;
3393 }
3394
3395
3396 static int wpa_driver_nl80211_ibss(struct wpa_driver_nl80211_data *drv,
3397                                    struct wpa_driver_associate_params *params)
3398 {
3399         struct nl_msg *msg;
3400         int ret = -1;
3401         int count = 0;
3402
3403         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS (ifindex=%d)", drv->ifindex);
3404
3405         if (wpa_driver_nl80211_set_mode(drv, params->mode)) {
3406                 wpa_printf(MSG_INFO, "nl80211: Failed to set interface into "
3407                            "IBSS mode");
3408                 return -1;
3409         }
3410
3411 retry:
3412         msg = nlmsg_alloc();
3413         if (!msg)
3414                 return -1;
3415
3416         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3417                     NL80211_CMD_JOIN_IBSS, 0);
3418         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3419
3420         if (params->ssid == NULL || params->ssid_len > sizeof(drv->ssid))
3421                 goto nla_put_failure;
3422
3423         wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3424                           params->ssid, params->ssid_len);
3425         NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3426                 params->ssid);
3427         os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3428         drv->ssid_len = params->ssid_len;
3429
3430         wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3431         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3432
3433         ret = nl80211_set_conn_keys(params, msg);
3434         if (ret)
3435                 goto nla_put_failure;
3436
3437         if (params->wpa_ie) {
3438                 wpa_hexdump(MSG_DEBUG,
3439                             "  * Extra IEs for Beacon/Probe Response frames",
3440                             params->wpa_ie, params->wpa_ie_len);
3441                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3442                         params->wpa_ie);
3443         }
3444
3445         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3446         msg = NULL;
3447         if (ret) {
3448                 wpa_printf(MSG_DEBUG, "nl80211: Join IBSS failed: ret=%d (%s)",
3449                            ret, strerror(-ret));
3450                 count++;
3451                 if (ret == -EALREADY && count == 1) {
3452                         wpa_printf(MSG_DEBUG, "nl80211: Retry IBSS join after "
3453                                    "forced leave");
3454                         nl80211_leave_ibss(drv);
3455                         nlmsg_free(msg);
3456                         goto retry;
3457                 }
3458
3459                 goto nla_put_failure;
3460         }
3461         ret = 0;
3462         wpa_printf(MSG_DEBUG, "nl80211: Join IBSS request sent successfully");
3463
3464 nla_put_failure:
3465         nlmsg_free(msg);
3466         return ret;
3467 }
3468
3469
3470 static int wpa_driver_nl80211_connect(
3471         struct wpa_driver_nl80211_data *drv,
3472         struct wpa_driver_associate_params *params)
3473 {
3474         struct nl_msg *msg;
3475         enum nl80211_auth_type type;
3476         int ret = 0;
3477
3478         msg = nlmsg_alloc();
3479         if (!msg)
3480                 return -1;
3481
3482         wpa_printf(MSG_DEBUG, "nl80211: Connect (ifindex=%d)", drv->ifindex);
3483         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3484                     NL80211_CMD_CONNECT, 0);
3485
3486         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3487         if (params->bssid) {
3488                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3489                            MAC2STR(params->bssid));
3490                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3491         }
3492         if (params->freq) {
3493                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3494                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3495         }
3496         if (params->ssid) {
3497                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3498                                   params->ssid, params->ssid_len);
3499                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3500                         params->ssid);
3501                 if (params->ssid_len > sizeof(drv->ssid))
3502                         goto nla_put_failure;
3503                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3504                 drv->ssid_len = params->ssid_len;
3505         }
3506         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3507         if (params->wpa_ie)
3508                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3509                         params->wpa_ie);
3510
3511         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
3512                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
3513         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
3514                 type = NL80211_AUTHTYPE_SHARED_KEY;
3515         else if (params->auth_alg & AUTH_ALG_LEAP)
3516                 type = NL80211_AUTHTYPE_NETWORK_EAP;
3517         else if (params->auth_alg & AUTH_ALG_FT)
3518                 type = NL80211_AUTHTYPE_FT;
3519         else
3520                 goto nla_put_failure;
3521
3522         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
3523         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
3524
3525         if (params->wpa_ie && params->wpa_ie_len) {
3526                 enum nl80211_wpa_versions ver;
3527
3528                 if (params->wpa_ie[0] == WLAN_EID_RSN)
3529                         ver = NL80211_WPA_VERSION_2;
3530                 else
3531                         ver = NL80211_WPA_VERSION_1;
3532
3533                 wpa_printf(MSG_DEBUG, "  * WPA Version %d", ver);
3534                 NLA_PUT_U32(msg, NL80211_ATTR_WPA_VERSIONS, ver);
3535         }
3536
3537         if (params->pairwise_suite != CIPHER_NONE) {
3538                 int cipher;
3539
3540                 switch (params->pairwise_suite) {
3541                 case CIPHER_WEP40:
3542                         cipher = WLAN_CIPHER_SUITE_WEP40;
3543                         break;
3544                 case CIPHER_WEP104:
3545                         cipher = WLAN_CIPHER_SUITE_WEP104;
3546                         break;
3547                 case CIPHER_CCMP:
3548                         cipher = WLAN_CIPHER_SUITE_CCMP;
3549                         break;
3550                 case CIPHER_TKIP:
3551                 default:
3552                         cipher = WLAN_CIPHER_SUITE_TKIP;
3553                         break;
3554                 }
3555                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITES_PAIRWISE, cipher);
3556         }
3557
3558         if (params->group_suite != CIPHER_NONE) {
3559                 int cipher;
3560
3561                 switch (params->group_suite) {
3562                 case CIPHER_WEP40:
3563                         cipher = WLAN_CIPHER_SUITE_WEP40;
3564                         break;
3565                 case CIPHER_WEP104:
3566                         cipher = WLAN_CIPHER_SUITE_WEP104;
3567                         break;
3568                 case CIPHER_CCMP:
3569                         cipher = WLAN_CIPHER_SUITE_CCMP;
3570                         break;
3571                 case CIPHER_TKIP:
3572                 default:
3573                         cipher = WLAN_CIPHER_SUITE_TKIP;
3574                         break;
3575                 }
3576                 NLA_PUT_U32(msg, NL80211_ATTR_CIPHER_SUITE_GROUP, cipher);
3577         }
3578
3579         if (params->key_mgmt_suite == KEY_MGMT_802_1X ||
3580             params->key_mgmt_suite == KEY_MGMT_PSK) {
3581                 int mgmt = WLAN_AKM_SUITE_PSK;
3582
3583                 switch (params->key_mgmt_suite) {
3584                 case KEY_MGMT_802_1X:
3585                         mgmt = WLAN_AKM_SUITE_8021X;
3586                         break;
3587                 case KEY_MGMT_PSK:
3588                 default:
3589                         mgmt = WLAN_AKM_SUITE_PSK;
3590                         break;
3591                 }
3592                 NLA_PUT_U32(msg, NL80211_ATTR_AKM_SUITES, mgmt);
3593         }
3594
3595         ret = nl80211_set_conn_keys(params, msg);
3596         if (ret)
3597                 goto nla_put_failure;
3598
3599         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3600         msg = NULL;
3601         if (ret) {
3602                 wpa_printf(MSG_DEBUG, "nl80211: MLME connect failed: ret=%d "
3603                            "(%s)", ret, strerror(-ret));
3604                 goto nla_put_failure;
3605         }
3606         ret = 0;
3607         wpa_printf(MSG_DEBUG, "nl80211: Connect request send successfully");
3608
3609 nla_put_failure:
3610         nlmsg_free(msg);
3611         return ret;
3612
3613 }
3614
3615
3616 static int wpa_driver_nl80211_associate(
3617         void *priv, struct wpa_driver_associate_params *params)
3618 {
3619         struct wpa_driver_nl80211_data *drv = priv;
3620         int ret = -1;
3621         struct nl_msg *msg;
3622
3623         if (params->mode == IEEE80211_MODE_AP)
3624                 return wpa_driver_nl80211_ap(drv, params);
3625
3626         if (params->mode == IEEE80211_MODE_IBSS)
3627                 return wpa_driver_nl80211_ibss(drv, params);
3628
3629         if (!(drv->capa.flags & WPA_DRIVER_FLAGS_SME)) {
3630                 if (wpa_driver_nl80211_set_mode(drv, params->mode) < 0)
3631                         return -1;
3632                 return wpa_driver_nl80211_connect(drv, params);
3633         }
3634
3635         drv->associated = 0;
3636
3637         msg = nlmsg_alloc();
3638         if (!msg)
3639                 return -1;
3640
3641         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
3642                    drv->ifindex);
3643         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3644                     NL80211_CMD_ASSOCIATE, 0);
3645
3646         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
3647         if (params->bssid) {
3648                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
3649                            MAC2STR(params->bssid));
3650                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
3651         }
3652         if (params->freq) {
3653                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
3654                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
3655         }
3656         if (params->ssid) {
3657                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
3658                                   params->ssid, params->ssid_len);
3659                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
3660                         params->ssid);
3661                 if (params->ssid_len > sizeof(drv->ssid))
3662                         goto nla_put_failure;
3663                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
3664                 drv->ssid_len = params->ssid_len;
3665         }
3666         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
3667         if (params->wpa_ie)
3668                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
3669                         params->wpa_ie);
3670
3671 #ifdef CONFIG_IEEE80211W
3672         if (params->mgmt_frame_protection == MGMT_FRAME_PROTECTION_REQUIRED)
3673                 NLA_PUT_U32(msg, NL80211_ATTR_USE_MFP, NL80211_MFP_REQUIRED);
3674 #endif /* CONFIG_IEEE80211W */
3675
3676         NLA_PUT_FLAG(msg, NL80211_ATTR_CONTROL_PORT);
3677
3678         if (params->prev_bssid) {
3679                 wpa_printf(MSG_DEBUG, "  * prev_bssid=" MACSTR,
3680                            MAC2STR(params->prev_bssid));
3681                 NLA_PUT(msg, NL80211_ATTR_PREV_BSSID, ETH_ALEN,
3682                         params->prev_bssid);
3683         }
3684
3685         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3686         msg = NULL;
3687         if (ret) {
3688                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
3689                            "(%s)", ret, strerror(-ret));
3690                 goto nla_put_failure;
3691         }
3692         ret = 0;
3693         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
3694                    "successfully");
3695
3696 nla_put_failure:
3697         nlmsg_free(msg);
3698         return ret;
3699 }
3700
3701
3702 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
3703                             int ifindex, int mode)
3704 {
3705         struct nl_msg *msg;
3706         int ret = -ENOBUFS;
3707
3708         msg = nlmsg_alloc();
3709         if (!msg)
3710                 return -ENOMEM;
3711
3712         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3713                     0, NL80211_CMD_SET_INTERFACE, 0);
3714         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
3715         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
3716
3717         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3718         if (!ret)
3719                 return 0;
3720 nla_put_failure:
3721         wpa_printf(MSG_DEBUG, "nl80211: Failed to set interface %d to mode %d:"
3722                    " %d (%s)", ifindex, mode, ret, strerror(-ret));
3723         return ret;
3724 }
3725
3726
3727 static int wpa_driver_nl80211_set_mode(void *priv, int mode)
3728 {
3729         struct wpa_driver_nl80211_data *drv = priv;
3730         int ret = -1;
3731         int nlmode;
3732
3733         switch (mode) {
3734         case 0:
3735                 nlmode = NL80211_IFTYPE_STATION;
3736                 break;
3737         case 1:
3738                 nlmode = NL80211_IFTYPE_ADHOC;
3739                 break;
3740         case 2:
3741                 nlmode = NL80211_IFTYPE_AP;
3742                 break;
3743         default:
3744                 return -1;
3745         }
3746
3747         if (nl80211_set_mode(drv, drv->ifindex, nlmode) == 0) {
3748                 drv->nlmode = nlmode;
3749                 ret = 0;
3750                 goto done;
3751         }
3752
3753         if (nlmode == drv->nlmode) {
3754                 ret = 0;
3755                 goto done; /* Already in the requested mode */
3756         }
3757
3758         /* mac80211 doesn't allow mode changes while the device is up, so
3759          * take the device down, try to set the mode again, and bring the
3760          * device back up.
3761          */
3762         if (hostapd_set_iface_flags(drv, drv->ifname, 0) == 0) {
3763                 /* Try to set the mode again while the interface is down */
3764                 ret = nl80211_set_mode(drv, drv->ifindex, nlmode);
3765                 if (hostapd_set_iface_flags(drv, drv->ifname, 1))
3766                         ret = -1;
3767         }
3768
3769         if (!ret)
3770                 drv->nlmode = nlmode;
3771
3772 done:
3773         if (!ret && nlmode == NL80211_IFTYPE_AP) {
3774                 /* Setup additional AP mode functionality if needed */
3775                 if (drv->monitor_ifidx < 0 &&
3776                     nl80211_create_monitor_interface(drv))
3777                         return -1;
3778         } else if (!ret && nlmode != NL80211_IFTYPE_AP) {
3779                 /* Remove additional AP mode functionality */
3780                 nl80211_remove_monitor_interface(drv);
3781         }
3782
3783         return ret;
3784 }
3785
3786
3787 static int wpa_driver_nl80211_get_capa(void *priv,
3788                                        struct wpa_driver_capa *capa)
3789 {
3790         struct wpa_driver_nl80211_data *drv = priv;
3791         if (!drv->has_capability)
3792                 return -1;
3793         os_memcpy(capa, &drv->capa, sizeof(*capa));
3794         return 0;
3795 }
3796
3797
3798 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
3799 {
3800         struct wpa_driver_nl80211_data *drv = priv;
3801
3802         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
3803                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
3804         drv->operstate = state;
3805         return wpa_driver_nl80211_send_oper_ifla(
3806                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
3807 }
3808
3809
3810 static int wpa_driver_nl80211_set_supp_port(void *priv, int authorized)
3811 {
3812         struct wpa_driver_nl80211_data *drv = priv;
3813         struct nl_msg *msg;
3814         struct nl80211_sta_flag_update upd;
3815
3816         msg = nlmsg_alloc();
3817         if (!msg)
3818                 return -ENOMEM;
3819
3820         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3821                     0, NL80211_CMD_SET_STATION, 0);
3822
3823         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3824                     if_nametoindex(drv->ifname));
3825         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, drv->bssid);
3826
3827         os_memset(&upd, 0, sizeof(upd));
3828         upd.mask = BIT(NL80211_STA_FLAG_AUTHORIZED);
3829         if (authorized)
3830                 upd.set = BIT(NL80211_STA_FLAG_AUTHORIZED);
3831         NLA_PUT(msg, NL80211_ATTR_STA_FLAGS2, sizeof(upd), &upd);
3832
3833         return send_and_recv_msgs(drv, msg, NULL, NULL);
3834  nla_put_failure:
3835         return -ENOBUFS;
3836 }
3837
3838
3839 #ifdef HOSTAPD
3840
3841 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
3842                                  int ifindex)
3843 {
3844         struct i802_bss *bss = &drv->bss;
3845         while (bss) {
3846                 if (ifindex == bss->ifindex)
3847                         return bss;
3848                 bss = bss->next;
3849         }
3850         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%d) failed", ifindex);
3851         return NULL;
3852 }
3853
3854
3855 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3856 {
3857         int i;
3858         int *old;
3859
3860         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
3861                    ifidx);
3862         for (i = 0; i < drv->num_if_indices; i++) {
3863                 if (drv->if_indices[i] == 0) {
3864                         drv->if_indices[i] = ifidx;
3865                         return;
3866                 }
3867         }
3868
3869         if (drv->if_indices != drv->default_if_indices)
3870                 old = drv->if_indices;
3871         else
3872                 old = NULL;
3873
3874         drv->if_indices = realloc(old,
3875                                   sizeof(int) * (drv->num_if_indices + 1));
3876         if (!drv->if_indices) {
3877                 if (!old)
3878                         drv->if_indices = drv->default_if_indices;
3879                 else
3880                         drv->if_indices = old;
3881                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
3882                            "interfaces");
3883                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
3884                 return;
3885         }
3886         drv->if_indices[drv->num_if_indices] = ifidx;
3887         drv->num_if_indices++;
3888 }
3889
3890
3891 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3892 {
3893         int i;
3894
3895         for (i = 0; i < drv->num_if_indices; i++) {
3896                 if (drv->if_indices[i] == ifidx) {
3897                         drv->if_indices[i] = 0;
3898                         break;
3899                 }
3900         }
3901 }
3902
3903
3904 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
3905 {
3906         int i;
3907
3908         for (i = 0; i < drv->num_if_indices; i++)
3909                 if (drv->if_indices[i] == ifidx)
3910                         return 1;
3911
3912         return 0;
3913 }
3914
3915
3916 static inline int min_int(int a, int b)
3917 {
3918         if (a < b)
3919                 return a;
3920         return b;
3921 }
3922
3923
3924 static int get_key_handler(struct nl_msg *msg, void *arg)
3925 {
3926         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3927         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3928
3929         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3930                   genlmsg_attrlen(gnlh, 0), NULL);
3931
3932         /*
3933          * TODO: validate the key index and mac address!
3934          * Otherwise, there's a race condition as soon as
3935          * the kernel starts sending key notifications.
3936          */
3937
3938         if (tb[NL80211_ATTR_KEY_SEQ])
3939                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
3940                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
3941         return NL_SKIP;
3942 }
3943
3944
3945 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
3946                            int idx, u8 *seq)
3947 {
3948         struct wpa_driver_nl80211_data *drv = priv;
3949         struct nl_msg *msg;
3950
3951         msg = nlmsg_alloc();
3952         if (!msg)
3953                 return -ENOMEM;
3954
3955         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3956                     0, NL80211_CMD_GET_KEY, 0);
3957
3958         if (addr)
3959                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3960         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3961         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3962
3963         memset(seq, 0, 6);
3964
3965         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3966  nla_put_failure:
3967         return -ENOBUFS;
3968 }
3969
3970
3971 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3972                               int mode)
3973 {
3974         struct wpa_driver_nl80211_data *drv = priv;
3975         struct nl_msg *msg;
3976         u8 rates[NL80211_MAX_SUPP_RATES];
3977         u8 rates_len = 0;
3978         int i;
3979
3980         msg = nlmsg_alloc();
3981         if (!msg)
3982                 return -ENOMEM;
3983
3984         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3985                     NL80211_CMD_SET_BSS, 0);
3986
3987         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3988                 rates[rates_len++] = basic_rates[i] / 5;
3989
3990         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3991
3992         /* TODO: multi-BSS support */
3993         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3994
3995         return send_and_recv_msgs(drv, msg, NULL, NULL);
3996  nla_put_failure:
3997         return -ENOBUFS;
3998 }
3999
4000
4001 /* Set kernel driver on given frequency (MHz) */
4002 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
4003 {
4004         struct wpa_driver_nl80211_data *drv = priv;
4005         return wpa_driver_nl80211_set_freq(drv, freq->freq, freq->ht_enabled,
4006                                            freq->sec_channel_offset);
4007 }
4008
4009
4010 static int i802_set_rts(void *priv, int rts)
4011 {
4012         struct wpa_driver_nl80211_data *drv = priv;
4013         struct nl_msg *msg;
4014         int ret = -ENOBUFS;
4015         u32 val;
4016
4017         msg = nlmsg_alloc();
4018         if (!msg)
4019                 return -ENOMEM;
4020
4021         if (rts >= 2347)
4022                 val = (u32) -1;
4023         else
4024                 val = rts;
4025
4026         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4027                     0, NL80211_CMD_SET_WIPHY, 0);
4028         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4029         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_RTS_THRESHOLD, val);
4030
4031         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4032         if (!ret)
4033                 return 0;
4034 nla_put_failure:
4035         wpa_printf(MSG_DEBUG, "nl80211: Failed to set RTS threshold %d: "
4036                    "%d (%s)", rts, ret, strerror(-ret));
4037         return ret;
4038 }
4039
4040
4041 static int i802_set_frag(void *priv, int frag)
4042 {
4043         struct wpa_driver_nl80211_data *drv = priv;
4044         struct nl_msg *msg;
4045         int ret = -ENOBUFS;
4046         u32 val;
4047
4048         msg = nlmsg_alloc();
4049         if (!msg)
4050                 return -ENOMEM;
4051
4052         if (frag >= 2346)
4053                 val = (u32) -1;
4054         else
4055                 val = frag;
4056
4057         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4058                     0, NL80211_CMD_SET_WIPHY, 0);
4059         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
4060         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FRAG_THRESHOLD, val);
4061
4062         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4063         if (!ret)
4064                 return 0;
4065 nla_put_failure:
4066         wpa_printf(MSG_DEBUG, "nl80211: Failed to set fragmentation threshold "
4067                    "%d: %d (%s)", frag, ret, strerror(-ret));
4068         return ret;
4069 }
4070
4071
4072 static int i802_flush(void *priv)
4073 {
4074         struct wpa_driver_nl80211_data *drv = priv;
4075         struct nl_msg *msg;
4076
4077         msg = nlmsg_alloc();
4078         if (!msg)
4079                 return -1;
4080
4081         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4082                     0, NL80211_CMD_DEL_STATION, 0);
4083
4084         /*
4085          * XXX: FIX! this needs to flush all VLANs too
4086          */
4087         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4088                     if_nametoindex(drv->ifname));
4089
4090         return send_and_recv_msgs(drv, msg, NULL, NULL);
4091  nla_put_failure:
4092         return -ENOBUFS;
4093 }
4094
4095
4096 static int get_sta_handler(struct nl_msg *msg, void *arg)
4097 {
4098         struct nlattr *tb[NL80211_ATTR_MAX + 1];
4099         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
4100         struct hostap_sta_driver_data *data = arg;
4101         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
4102         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
4103                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
4104                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
4105                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
4106                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
4107                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
4108         };
4109
4110         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
4111                   genlmsg_attrlen(gnlh, 0), NULL);
4112
4113         /*
4114          * TODO: validate the interface and mac address!
4115          * Otherwise, there's a race condition as soon as
4116          * the kernel starts sending station notifications.
4117          */
4118
4119         if (!tb[NL80211_ATTR_STA_INFO]) {
4120                 wpa_printf(MSG_DEBUG, "sta stats missing!");
4121                 return NL_SKIP;
4122         }
4123         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
4124                              tb[NL80211_ATTR_STA_INFO],
4125                              stats_policy)) {
4126                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
4127                 return NL_SKIP;
4128         }
4129
4130         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
4131                 data->inactive_msec =
4132                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
4133         if (stats[NL80211_STA_INFO_RX_BYTES])
4134                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
4135         if (stats[NL80211_STA_INFO_TX_BYTES])
4136                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
4137         if (stats[NL80211_STA_INFO_RX_PACKETS])
4138                 data->rx_packets =
4139                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
4140         if (stats[NL80211_STA_INFO_TX_PACKETS])
4141                 data->tx_packets =
4142                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
4143
4144         return NL_SKIP;
4145 }
4146
4147 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
4148                               const u8 *addr)
4149 {
4150         struct wpa_driver_nl80211_data *drv = priv;
4151         struct nl_msg *msg;
4152
4153         os_memset(data, 0, sizeof(*data));
4154         msg = nlmsg_alloc();
4155         if (!msg)
4156                 return -ENOMEM;
4157
4158         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4159                     0, NL80211_CMD_GET_STATION, 0);
4160
4161         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4162         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4163
4164         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
4165  nla_put_failure:
4166         return -ENOBUFS;
4167 }
4168
4169
4170 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
4171                                     int cw_min, int cw_max, int burst_time)
4172 {
4173         struct wpa_driver_nl80211_data *drv = priv;
4174         struct nl_msg *msg;
4175         struct nlattr *txq, *params;
4176
4177         msg = nlmsg_alloc();
4178         if (!msg)
4179                 return -1;
4180
4181         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4182                     0, NL80211_CMD_SET_WIPHY, 0);
4183
4184         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4185
4186         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
4187         if (!txq)
4188                 goto nla_put_failure;
4189
4190         /* We are only sending parameters for a single TXQ at a time */
4191         params = nla_nest_start(msg, 1);
4192         if (!params)
4193                 goto nla_put_failure;
4194
4195         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
4196         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
4197          * 32 usec, so need to convert the value here. */
4198         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
4199         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
4200         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
4201         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
4202
4203         nla_nest_end(msg, params);
4204
4205         nla_nest_end(msg, txq);
4206
4207         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
4208                 return 0;
4209  nla_put_failure:
4210         return -1;
4211 }
4212
4213
4214 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
4215 {
4216         struct wpa_driver_nl80211_data *drv = priv;
4217         struct nl_msg *msg;
4218
4219         msg = nlmsg_alloc();
4220         if (!msg)
4221                 return -ENOMEM;
4222
4223         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
4224                     NL80211_CMD_SET_BSS, 0);
4225
4226         if (cts >= 0)
4227                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
4228         if (preamble >= 0)
4229                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
4230         if (slot >= 0)
4231                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
4232
4233         /* TODO: multi-BSS support */
4234         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4235
4236         return send_and_recv_msgs(drv, msg, NULL, NULL);
4237  nla_put_failure:
4238         return -ENOBUFS;
4239 }
4240
4241
4242 static int i802_set_cts_protect(void *priv, int value)
4243 {
4244         return i802_set_bss(priv, value, -1, -1);
4245 }
4246
4247
4248 static int i802_set_preamble(void *priv, int value)
4249 {
4250         return i802_set_bss(priv, -1, value, -1);
4251 }
4252
4253
4254 static int i802_set_short_slot_time(void *priv, int value)
4255 {
4256         return i802_set_bss(priv, -1, -1, value);
4257 }
4258
4259
4260 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4261                              const char *ifname, int vlan_id)
4262 {
4263         struct wpa_driver_nl80211_data *drv = priv;
4264         struct nl_msg *msg;
4265
4266         msg = nlmsg_alloc();
4267         if (!msg)
4268                 return -ENOMEM;
4269
4270         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4271                     0, NL80211_CMD_SET_STATION, 0);
4272
4273         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4274                     if_nametoindex(drv->ifname));
4275         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4276         NLA_PUT_U32(msg, NL80211_ATTR_STA_VLAN,
4277                     if_nametoindex(ifname));
4278
4279         return send_and_recv_msgs(drv, msg, NULL, NULL);
4280  nla_put_failure:
4281         return -ENOBUFS;
4282 }
4283
4284
4285 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4286 {
4287         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4288         struct sockaddr_ll lladdr;
4289         unsigned char buf[3000];
4290         int len;
4291         socklen_t fromlen = sizeof(lladdr);
4292
4293         len = recvfrom(sock, buf, sizeof(buf), 0,
4294                        (struct sockaddr *)&lladdr, &fromlen);
4295         if (len < 0) {
4296                 perror("recv");
4297                 return;
4298         }
4299
4300         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4301                 void *ctx;
4302                 ctx = hostapd_sta_get_bss(drv->ctx, lladdr.sll_addr);
4303                 if (!ctx)
4304                         return;
4305                 hostapd_eapol_receive(ctx, lladdr.sll_addr, buf, len);
4306         }
4307 }
4308
4309
4310 static int i802_get_inact_sec(void *priv, const u8 *addr)
4311 {
4312         struct hostap_sta_driver_data data;
4313         int ret;
4314
4315         data.inactive_msec = (unsigned long) -1;
4316         ret = i802_read_sta_data(priv, &data, addr);
4317         if (ret || data.inactive_msec == (unsigned long) -1)
4318                 return -1;
4319         return data.inactive_msec / 1000;
4320 }
4321
4322
4323 static int i802_sta_clear_stats(void *priv, const u8 *addr)
4324 {
4325 #if 0
4326         /* TODO */
4327 #endif
4328         return 0;
4329 }
4330
4331
4332 static int i802_sta_deauth(void *priv, const u8 *own_addr, const u8 *addr,
4333                            int reason)
4334 {
4335         struct wpa_driver_nl80211_data *drv = priv;
4336         struct ieee80211_mgmt mgmt;
4337
4338         memset(&mgmt, 0, sizeof(mgmt));
4339         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4340                                           WLAN_FC_STYPE_DEAUTH);
4341         memcpy(mgmt.da, addr, ETH_ALEN);
4342         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4343         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4344         mgmt.u.deauth.reason_code = host_to_le16(reason);
4345         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4346                                             IEEE80211_HDRLEN +
4347                                             sizeof(mgmt.u.deauth));
4348 }
4349
4350
4351 static int i802_sta_disassoc(void *priv, const u8 *own_addr, const u8 *addr,
4352                              int reason)
4353 {
4354         struct wpa_driver_nl80211_data *drv = priv;
4355         struct ieee80211_mgmt mgmt;
4356
4357         memset(&mgmt, 0, sizeof(mgmt));
4358         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
4359                                           WLAN_FC_STYPE_DISASSOC);
4360         memcpy(mgmt.da, addr, ETH_ALEN);
4361         memcpy(mgmt.sa, own_addr, ETH_ALEN);
4362         memcpy(mgmt.bssid, own_addr, ETH_ALEN);
4363         mgmt.u.disassoc.reason_code = host_to_le16(reason);
4364         return wpa_driver_nl80211_send_mlme(drv, (u8 *) &mgmt,
4365                                             IEEE80211_HDRLEN +
4366                                             sizeof(mgmt.u.disassoc));
4367 }
4368
4369
4370 static void *i802_init(struct hostapd_data *hapd,
4371                        struct wpa_init_params *params)
4372 {
4373         struct wpa_driver_nl80211_data *drv;
4374         size_t i;
4375
4376         drv = wpa_driver_nl80211_init(hapd, params->ifname);
4377         if (drv == NULL)
4378                 return NULL;
4379
4380         drv->bss.ifindex = drv->ifindex;
4381
4382         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
4383         drv->if_indices = drv->default_if_indices;
4384         for (i = 0; i < params->num_bridge; i++) {
4385                 if (params->bridge[i])
4386                         add_ifidx(drv, if_nametoindex(params->bridge[i]));
4387         }
4388
4389         /* start listening for EAPOL on the default AP interface */
4390         add_ifidx(drv, drv->ifindex);
4391
4392         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
4393                 goto failed;
4394
4395         if (params->bssid) {
4396                 if (set_ifhwaddr(drv, drv->ifname, params->bssid))
4397                         goto failed;
4398         }
4399
4400         if (wpa_driver_nl80211_set_mode(drv, IEEE80211_MODE_AP)) {
4401                 wpa_printf(MSG_ERROR, "nl80211: Failed to set interface %s "
4402                            "into AP mode", drv->ifname);
4403                 goto failed;
4404         }
4405
4406         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
4407                 goto failed;
4408
4409         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
4410         if (drv->eapol_sock < 0) {
4411                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
4412                 goto failed;
4413         }
4414
4415         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
4416         {
4417                 printf("Could not register read socket for eapol\n");
4418                 goto failed;
4419         }
4420
4421         if (get_ifhwaddr(drv, drv->ifname, params->own_addr))
4422                 goto failed;
4423
4424         return drv;
4425
4426 failed:
4427         nl80211_remove_monitor_interface(drv);
4428         if (drv->ioctl_sock >= 0)
4429                 close(drv->ioctl_sock);
4430
4431         genl_family_put(drv->nl80211);
4432         nl_cache_free(drv->nl_cache);
4433         nl_handle_destroy(drv->nl_handle);
4434         nl_cb_put(drv->nl_cb);
4435
4436         os_free(drv);
4437         return NULL;
4438 }
4439
4440
4441 static void i802_deinit(void *priv)
4442 {
4443         wpa_driver_nl80211_deinit(priv);
4444 }
4445
4446 #endif /* HOSTAPD */
4447
4448
4449 static enum nl80211_iftype wpa_driver_nl80211_if_type(
4450         enum wpa_driver_if_type type)
4451 {
4452         switch (type) {
4453         case WPA_IF_STATION:
4454                 return NL80211_IFTYPE_STATION;
4455         case WPA_IF_AP_VLAN:
4456                 return NL80211_IFTYPE_AP_VLAN;
4457         case WPA_IF_AP_BSS:
4458                 return NL80211_IFTYPE_AP;
4459         }
4460         return -1;
4461 }
4462
4463
4464 static int wpa_driver_nl80211_if_add(const char *iface, void *priv,
4465                                      enum wpa_driver_if_type type,
4466                                      const char *ifname, const u8 *addr,
4467                                      void *bss_ctx)
4468 {
4469         struct wpa_driver_nl80211_data *drv = priv;
4470         int ifidx;
4471 #ifdef HOSTAPD
4472         struct i802_bss *bss = NULL;
4473
4474         if (type == WPA_IF_AP_BSS) {
4475                 bss = os_zalloc(sizeof(*bss));
4476                 if (bss == NULL)
4477                         return -1;
4478         }
4479 #endif /* HOSTAPD */
4480
4481         ifidx = nl80211_create_iface(drv, ifname,
4482                                      wpa_driver_nl80211_if_type(type), addr);
4483         if (ifidx < 0) {
4484 #ifdef HOSTAPD
4485                 os_free(bss);
4486 #endif /* HOSTAPD */
4487                 return -1;
4488         }
4489
4490 #ifdef HOSTAPD
4491         if (type == WPA_IF_AP_BSS) {
4492                 if (hostapd_set_iface_flags(priv, ifname, 1)) {
4493                         nl80211_remove_iface(priv, ifidx);
4494                         os_free(bss);
4495                         return -1;
4496                 }
4497                 bss->ifindex = ifidx;
4498                 bss->next = drv->bss.next;
4499                 drv->bss.next = bss;
4500         }
4501 #endif /* HOSTAPD */
4502
4503         return 0;
4504 }
4505
4506
4507 static int wpa_driver_nl80211_if_remove(void *priv,
4508                                         enum wpa_driver_if_type type,
4509                                         const char *ifname)
4510 {
4511         struct wpa_driver_nl80211_data *drv = priv;
4512         int ifindex = if_nametoindex(ifname);
4513
4514         nl80211_remove_iface(drv, ifindex);
4515
4516 #ifdef HOSTAPD
4517         if (type == WPA_IF_AP_BSS) {
4518                 struct i802_bss *bss, *prev;
4519                 prev = &drv->bss;
4520                 bss = drv->bss.next;
4521                 while (bss) {
4522                         if (ifindex == bss->ifindex) {
4523                                 prev->next = bss->next;
4524                                 os_free(bss);
4525                                 break;
4526                         }
4527                         prev = bss;
4528                         bss = bss->next;
4529                 }
4530         }
4531 #endif /* HOSTAPD */
4532
4533         return 0;
4534 }
4535
4536
4537 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
4538         .name = "nl80211",
4539         .desc = "Linux nl80211/cfg80211",
4540         .get_bssid = wpa_driver_nl80211_get_bssid,
4541         .get_ssid = wpa_driver_nl80211_get_ssid,
4542         .set_key = wpa_driver_nl80211_set_key,
4543         .scan2 = wpa_driver_nl80211_scan,
4544         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
4545         .deauthenticate = wpa_driver_nl80211_deauthenticate,
4546         .disassociate = wpa_driver_nl80211_disassociate,
4547         .authenticate = wpa_driver_nl80211_authenticate,
4548         .associate = wpa_driver_nl80211_associate,
4549         .init = wpa_driver_nl80211_init,
4550         .deinit = wpa_driver_nl80211_deinit,
4551         .get_capa = wpa_driver_nl80211_get_capa,
4552         .set_operstate = wpa_driver_nl80211_set_operstate,
4553         .set_supp_port = wpa_driver_nl80211_set_supp_port,
4554         .set_country = wpa_driver_nl80211_set_country,
4555         .set_beacon = wpa_driver_nl80211_set_beacon,
4556         .if_add = wpa_driver_nl80211_if_add,
4557         .if_remove = wpa_driver_nl80211_if_remove,
4558         .send_mlme = wpa_driver_nl80211_send_mlme,
4559         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
4560         .sta_add = wpa_driver_nl80211_sta_add,
4561         .sta_remove = wpa_driver_nl80211_sta_remove,
4562         .hapd_send_eapol = wpa_driver_nl80211_hapd_send_eapol,
4563         .sta_set_flags = wpa_driver_nl80211_sta_set_flags,
4564 #ifdef HOSTAPD
4565         .hapd_init = i802_init,
4566         .hapd_deinit = i802_deinit,
4567         .get_seqnum = i802_get_seqnum,
4568         .flush = i802_flush,
4569         .read_sta_data = i802_read_sta_data,
4570         .sta_deauth = i802_sta_deauth,
4571         .sta_disassoc = i802_sta_disassoc,
4572         .get_inact_sec = i802_get_inact_sec,
4573         .sta_clear_stats = i802_sta_clear_stats,
4574         .set_freq = i802_set_freq,
4575         .set_rts = i802_set_rts,
4576         .set_frag = i802_set_frag,
4577         .set_rate_sets = i802_set_rate_sets,
4578         .set_cts_protect = i802_set_cts_protect,
4579         .set_preamble = i802_set_preamble,
4580         .set_short_slot_time = i802_set_short_slot_time,
4581         .set_tx_queue_params = i802_set_tx_queue_params,
4582         .set_sta_vlan = i802_set_sta_vlan,
4583 #endif /* HOSTAPD */
4584 };