src/drivers/driver_nl80211.c

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