vcs.maemo.org Git - wpasupplicant/blob - src/drivers/driver_nl80211.c

   1 /*
   2  * Driver interaction with Linux nl80211/cfg80211
   3  * Copyright (c) 2003-2008, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #include "includes.h"
  16 #include <sys/ioctl.h>
  17 #include <net/if_arp.h>
  18 #include <netlink/genl/genl.h>
  19 #include <netlink/genl/family.h>
  20 #include <netlink/genl/ctrl.h>
  21 #include "nl80211_copy.h"
  22 #include "wireless_copy.h"
  23
  24 #include "common.h"
  25 #include "driver.h"
  26 #include "eloop.h"
  27 #include "ieee802_11_defs.h"
  28
  29 #if defined(CONFIG_AP) || defined(HOSTAPD)
  30 #include <netpacket/packet.h>
  31 #include <linux/filter.h>
  32 #include "radiotap.h"
  33 #include "radiotap_iter.h"
  34 #endif /* CONFIG_AP || HOSTAPD */
  35
  36 #ifdef CONFIG_AP
  37
  38 #include "../hostapd/hostapd_defs.h"
  39
  40 #ifndef ETH_P_ALL
  41 #define ETH_P_ALL 0x0003
  42 #endif
  43
  44 #endif /* CONFIG_AP */
  45
  46 #ifdef HOSTAPD
  47 #include <netlink/msg.h>
  48 #include <netlink/attr.h>
  49 #include <net/if.h>
  50 #include <net/if_arp.h>
  51
  52 #include "../../hostapd/hostapd.h"
  53 #include "../../hostapd/config.h"
  54 #include "../../hostapd/hw_features.h"
  55 #include "../../hostapd/mlme.h"
  56 #include "../../hostapd/sta_flags.h"
  57 #include "ieee802_11_common.h"
  58
  59 #ifdef CONFIG_LIBNL20
  60 /* libnl 2.0 compatibility code */
  61 #define nl_handle_alloc_cb nl_socket_alloc_cb
  62 #define nl_handle_destroy nl_socket_free
  63 #endif /* CONFIG_LIBNL20 */
  64
  65 #endif /* HOSTAPD */
  66
  67
  68 #ifndef IFF_LOWER_UP
  69 #define IFF_LOWER_UP   0x10000         /* driver signals L1 up         */
  70 #endif
  71 #ifndef IFF_DORMANT
  72 #define IFF_DORMANT    0x20000         /* driver signals dormant       */
  73 #endif
  74
  75 #ifndef IF_OPER_DORMANT
  76 #define IF_OPER_DORMANT 5
  77 #endif
  78 #ifndef IF_OPER_UP
  79 #define IF_OPER_UP 6
  80 #endif
  81
  82 struct i802_bss {
  83         struct i802_bss *next;
  84         char ifname[IFNAMSIZ + 1];
  85         unsigned int beacon_set:1;
  86 };
  87
  88 struct wpa_driver_nl80211_data {
  89         void *ctx;
  90         int link_event_sock;
  91         int ioctl_sock; /* socket for ioctl() use */
  92         char ifname[IFNAMSIZ + 1];
  93         int ifindex;
  94         int if_removed;
  95         struct wpa_driver_capa capa;
  96         int has_capability;
  97
  98         int operstate;
  99
 100         int scan_complete_events;
 101
 102         struct nl_handle *nl_handle;
 103         struct nl_cache *nl_cache;
 104         struct nl_cb *nl_cb;
 105         struct genl_family *nl80211;
 106
 107         u8 bssid[ETH_ALEN];
 108         int associated;
 109         u8 ssid[32];
 110         size_t ssid_len;
 111
 112 #ifdef CONFIG_AP
 113         int beacon_int;
 114         unsigned int beacon_set:1;
 115         int monitor_sock;
 116         int monitor_ifidx;
 117 #endif /* CONFIG_AP */
 118
 119 #ifdef HOSTAPD
 120         struct hostapd_data *hapd;
 121
 122         int wext_sock; /* socket for wireless events */
 123         int eapol_sock; /* socket for EAPOL frames */
 124         int monitor_sock; /* socket for monitor */
 125         int monitor_ifidx;
 126
 127         int default_if_indices[16];
 128         int *if_indices;
 129         int num_if_indices;
 130
 131         int we_version;
 132         int beacon_int;
 133         struct i802_bss bss;
 134         unsigned int ht_40mhz_scan:1;
 135
 136         int last_freq;
 137         int last_freq_ht;
 138         struct hostapd_neighbor_bss *neighbors;
 139         size_t num_neighbors;
 140 #endif /* HOSTAPD */
 141 };
 142
 143
 144 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx,
 145                                             void *timeout_ctx);
 146 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
 147                                        int mode);
 148 static int
 149 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv);
 150
 151 #ifdef CONFIG_AP
 152 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
 153                                  int ifidx);
 154 #endif /* CONFIG_AP */
 155
 156
 157 #ifdef HOSTAPD
 158 #define wpa_supplicant_event(c, e, d) do { } while (0)
 159 #endif /* HOSTAPD */
 160
 161 /* nl80211 code */
 162 static int ack_handler(struct nl_msg *msg, void *arg)
 163 {
 164         int *err = arg;
 165         *err = 0;
 166         return NL_STOP;
 167 }
 168
 169 static int finish_handler(struct nl_msg *msg, void *arg)
 170 {
 171         int *ret = arg;
 172         *ret = 0;
 173         return NL_SKIP;
 174 }
 175
 176 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 177                          void *arg)
 178 {
 179         int *ret = arg;
 180         *ret = err->error;
 181         return NL_SKIP;
 182 }
 183
 184 static int send_and_recv_msgs(struct wpa_driver_nl80211_data *drv,
 185                               struct nl_msg *msg,
 186                               int (*valid_handler)(struct nl_msg *, void *),
 187                               void *valid_data)
 188 {
 189         struct nl_cb *cb;
 190         int err = -ENOMEM;
 191
 192         cb = nl_cb_clone(drv->nl_cb);
 193         if (!cb)
 194                 goto out;
 195
 196         err = nl_send_auto_complete(drv->nl_handle, msg);
 197         if (err < 0)
 198                 goto out;
 199
 200         err = 1;
 201
 202         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 203         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 204         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 205
 206         if (valid_handler)
 207                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 208                           valid_handler, valid_data);
 209
 210         while (err > 0)
 211                 nl_recvmsgs(drv->nl_handle, cb);
 212  out:
 213         nl_cb_put(cb);
 214         nlmsg_free(msg);
 215         return err;
 216 }
 217
 218
 219 struct family_data {
 220         const char *group;
 221         int id;
 222 };
 223
 224
 225 static int family_handler(struct nl_msg *msg, void *arg)
 226 {
 227         struct family_data *res = arg;
 228         struct nlattr *tb[CTRL_ATTR_MAX + 1];
 229         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 230         struct nlattr *mcgrp;
 231         int i;
 232
 233         nla_parse(tb, CTRL_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 234                   genlmsg_attrlen(gnlh, 0), NULL);
 235         if (!tb[CTRL_ATTR_MCAST_GROUPS])
 236                 return NL_SKIP;
 237
 238         nla_for_each_nested(mcgrp, tb[CTRL_ATTR_MCAST_GROUPS], i) {
 239                 struct nlattr *tb2[CTRL_ATTR_MCAST_GRP_MAX + 1];
 240                 nla_parse(tb2, CTRL_ATTR_MCAST_GRP_MAX, nla_data(mcgrp),
 241                           nla_len(mcgrp), NULL);
 242                 if (!tb2[CTRL_ATTR_MCAST_GRP_NAME] ||
 243                     !tb2[CTRL_ATTR_MCAST_GRP_ID] ||
 244                     os_strncmp(nla_data(tb2[CTRL_ATTR_MCAST_GRP_NAME]),
 245                                res->group,
 246                                nla_len(tb2[CTRL_ATTR_MCAST_GRP_NAME])) != 0)
 247                         continue;
 248                 res->id = nla_get_u32(tb2[CTRL_ATTR_MCAST_GRP_ID]);
 249                 break;
 250         };
 251
 252         return NL_SKIP;
 253 }
 254
 255
 256 static int nl_get_multicast_id(struct wpa_driver_nl80211_data *drv,
 257                                const char *family, const char *group)
 258 {
 259         struct nl_msg *msg;
 260         int ret = -1;
 261         struct family_data res = { group, -ENOENT };
 262
 263         msg = nlmsg_alloc();
 264         if (!msg)
 265                 return -ENOMEM;
 266         genlmsg_put(msg, 0, 0, genl_ctrl_resolve(drv->nl_handle, "nlctrl"),
 267                     0, 0, CTRL_CMD_GETFAMILY, 0);
 268         NLA_PUT_STRING(msg, CTRL_ATTR_FAMILY_NAME, family);
 269
 270         ret = send_and_recv_msgs(drv, msg, family_handler, &res);
 271         msg = NULL;
 272         if (ret == 0)
 273                 ret = res.id;
 274
 275 nla_put_failure:
 276         nlmsg_free(msg);
 277         return ret;
 278 }
 279
 280
 281 static int wpa_driver_nl80211_send_oper_ifla(
 282         struct wpa_driver_nl80211_data *drv,
 283         int linkmode, int operstate)
 284 {
 285         struct {
 286                 struct nlmsghdr hdr;
 287                 struct ifinfomsg ifinfo;
 288                 char opts[16];
 289         } req;
 290         struct rtattr *rta;
 291         static int nl_seq;
 292         ssize_t ret;
 293
 294         os_memset(&req, 0, sizeof(req));
 295
 296         req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
 297         req.hdr.nlmsg_type = RTM_SETLINK;
 298         req.hdr.nlmsg_flags = NLM_F_REQUEST;
 299         req.hdr.nlmsg_seq = ++nl_seq;
 300         req.hdr.nlmsg_pid = 0;
 301
 302         req.ifinfo.ifi_family = AF_UNSPEC;
 303         req.ifinfo.ifi_type = 0;
 304         req.ifinfo.ifi_index = drv->ifindex;
 305         req.ifinfo.ifi_flags = 0;
 306         req.ifinfo.ifi_change = 0;
 307
 308         if (linkmode != -1) {
 309                 rta = (struct rtattr *)
 310                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 311                 rta->rta_type = IFLA_LINKMODE;
 312                 rta->rta_len = RTA_LENGTH(sizeof(char));
 313                 *((char *) RTA_DATA(rta)) = linkmode;
 314                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 315                         RTA_LENGTH(sizeof(char));
 316         }
 317         if (operstate != -1) {
 318                 rta = (struct rtattr *)
 319                         ((char *) &req + NLMSG_ALIGN(req.hdr.nlmsg_len));
 320                 rta->rta_type = IFLA_OPERSTATE;
 321                 rta->rta_len = RTA_LENGTH(sizeof(char));
 322                 *((char *) RTA_DATA(rta)) = operstate;
 323                 req.hdr.nlmsg_len = NLMSG_ALIGN(req.hdr.nlmsg_len) +
 324                         RTA_LENGTH(sizeof(char));
 325         }
 326
 327         wpa_printf(MSG_DEBUG, "WEXT: Operstate: linkmode=%d, operstate=%d",
 328                    linkmode, operstate);
 329
 330         ret = send(drv->link_event_sock, &req, req.hdr.nlmsg_len, 0);
 331         if (ret < 0) {
 332                 wpa_printf(MSG_DEBUG, "WEXT: Sending operstate IFLA failed: "
 333                            "%s (assume operstate is not supported)",
 334                            strerror(errno));
 335         }
 336
 337         return ret < 0 ? -1 : 0;
 338 }
 339
 340
 341 static int wpa_driver_nl80211_set_auth_param(
 342         struct wpa_driver_nl80211_data *drv, int idx, u32 value)
 343 {
 344         struct iwreq iwr;
 345         int ret = 0;
 346
 347         os_memset(&iwr, 0, sizeof(iwr));
 348         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
 349         iwr.u.param.flags = idx & IW_AUTH_INDEX;
 350         iwr.u.param.value = value;
 351
 352         if (ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr) < 0) {
 353                 if (errno != EOPNOTSUPP) {
 354                         wpa_printf(MSG_DEBUG, "WEXT: SIOCSIWAUTH(param %d "
 355                                    "value 0x%x) failed: %s)",
 356                                    idx, value, strerror(errno));
 357                 }
 358                 ret = errno == EOPNOTSUPP ? -2 : -1;
 359         }
 360
 361         return ret;
 362 }
 363
 364
 365 static int wpa_driver_nl80211_get_bssid(void *priv, u8 *bssid)
 366 {
 367         struct wpa_driver_nl80211_data *drv = priv;
 368         if (!drv->associated)
 369                 return -1;
 370         os_memcpy(bssid, drv->bssid, ETH_ALEN);
 371         return 0;
 372 }
 373
 374
 375 static int wpa_driver_nl80211_get_ssid(void *priv, u8 *ssid)
 376 {
 377         struct wpa_driver_nl80211_data *drv = priv;
 378         if (!drv->associated)
 379                 return -1;
 380         os_memcpy(ssid, drv->ssid, drv->ssid_len);
 381         return drv->ssid_len;
 382 }
 383
 384
 385 static void wpa_driver_nl80211_event_link(struct wpa_driver_nl80211_data *drv,
 386                                           void *ctx, char *buf, size_t len,
 387                                           int del)
 388 {
 389         union wpa_event_data event;
 390
 391         os_memset(&event, 0, sizeof(event));
 392         if (len > sizeof(event.interface_status.ifname))
 393                 len = sizeof(event.interface_status.ifname) - 1;
 394         os_memcpy(event.interface_status.ifname, buf, len);
 395         event.interface_status.ievent = del ? EVENT_INTERFACE_REMOVED :
 396                 EVENT_INTERFACE_ADDED;
 397
 398         wpa_printf(MSG_DEBUG, "RTM_%sLINK, IFLA_IFNAME: Interface '%s' %s",
 399                    del ? "DEL" : "NEW",
 400                    event.interface_status.ifname,
 401                    del ? "removed" : "added");
 402
 403         if (os_strcmp(drv->ifname, event.interface_status.ifname) == 0) {
 404                 if (del)
 405                         drv->if_removed = 1;
 406                 else
 407                         drv->if_removed = 0;
 408         }
 409
 410         wpa_supplicant_event(ctx, EVENT_INTERFACE_STATUS, &event);
 411 }
 412
 413
 414 static int wpa_driver_nl80211_own_ifname(struct wpa_driver_nl80211_data *drv,
 415                                          struct nlmsghdr *h)
 416 {
 417         struct ifinfomsg *ifi;
 418         int attrlen, _nlmsg_len, rta_len;
 419         struct rtattr *attr;
 420
 421         ifi = NLMSG_DATA(h);
 422
 423         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 424
 425         attrlen = h->nlmsg_len - _nlmsg_len;
 426         if (attrlen < 0)
 427                 return 0;
 428
 429         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 430
 431         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 432         while (RTA_OK(attr, attrlen)) {
 433                 if (attr->rta_type == IFLA_IFNAME) {
 434                         if (os_strcmp(((char *) attr) + rta_len, drv->ifname)
 435                             == 0)
 436                                 return 1;
 437                         else
 438                                 break;
 439                 }
 440                 attr = RTA_NEXT(attr, attrlen);
 441         }
 442
 443         return 0;
 444 }
 445
 446
 447 static int wpa_driver_nl80211_own_ifindex(struct wpa_driver_nl80211_data *drv,
 448                                           int ifindex, struct nlmsghdr *h)
 449 {
 450         if (drv->ifindex == ifindex)
 451                 return 1;
 452
 453         if (drv->if_removed && wpa_driver_nl80211_own_ifname(drv, h)) {
 454                 drv->ifindex = if_nametoindex(drv->ifname);
 455                 wpa_printf(MSG_DEBUG, "nl80211: Update ifindex for a removed "
 456                            "interface");
 457                 wpa_driver_nl80211_finish_drv_init(drv);
 458                 return 1;
 459         }
 460
 461         return 0;
 462 }
 463
 464
 465 static void wpa_driver_nl80211_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
 466                                               void *ctx, struct nlmsghdr *h,
 467                                               size_t len)
 468 {
 469         struct ifinfomsg *ifi;
 470         int attrlen, _nlmsg_len, rta_len;
 471         struct rtattr * attr;
 472
 473         if (len < sizeof(*ifi))
 474                 return;
 475
 476         ifi = NLMSG_DATA(h);
 477
 478         if (!wpa_driver_nl80211_own_ifindex(drv, ifi->ifi_index, h)) {
 479                 wpa_printf(MSG_DEBUG, "Ignore event for foreign ifindex %d",
 480                            ifi->ifi_index);
 481                 return;
 482         }
 483
 484         wpa_printf(MSG_DEBUG, "RTM_NEWLINK: operstate=%d ifi_flags=0x%x "
 485                    "(%s%s%s%s)",
 486                    drv->operstate, ifi->ifi_flags,
 487                    (ifi->ifi_flags & IFF_UP) ? "[UP]" : "",
 488                    (ifi->ifi_flags & IFF_RUNNING) ? "[RUNNING]" : "",
 489                    (ifi->ifi_flags & IFF_LOWER_UP) ? "[LOWER_UP]" : "",
 490                    (ifi->ifi_flags & IFF_DORMANT) ? "[DORMANT]" : "");
 491         /*
 492          * Some drivers send the association event before the operup event--in
 493          * this case, lifting operstate in wpa_driver_nl80211_set_operstate()
 494          * fails. This will hit us when wpa_supplicant does not need to do
 495          * IEEE 802.1X authentication
 496          */
 497         if (drv->operstate == 1 &&
 498             (ifi->ifi_flags & (IFF_LOWER_UP | IFF_DORMANT)) == IFF_LOWER_UP &&
 499             !(ifi->ifi_flags & IFF_RUNNING))
 500                 wpa_driver_nl80211_send_oper_ifla(drv, -1, IF_OPER_UP);
 501
 502         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 503
 504         attrlen = h->nlmsg_len - _nlmsg_len;
 505         if (attrlen < 0)
 506                 return;
 507
 508         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 509
 510         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 511         while (RTA_OK(attr, attrlen)) {
 512                 if (attr->rta_type == IFLA_IFNAME) {
 513                         wpa_driver_nl80211_event_link(
 514                                 drv, ctx,
 515                                 ((char *) attr) + rta_len,
 516                                 attr->rta_len - rta_len, 0);
 517                 }
 518                 attr = RTA_NEXT(attr, attrlen);
 519         }
 520 }
 521
 522
 523 static void wpa_driver_nl80211_event_rtm_dellink(struct wpa_driver_nl80211_data *drv,
 524                                               void *ctx, struct nlmsghdr *h,
 525                                               size_t len)
 526 {
 527         struct ifinfomsg *ifi;
 528         int attrlen, _nlmsg_len, rta_len;
 529         struct rtattr * attr;
 530
 531         if (len < sizeof(*ifi))
 532                 return;
 533
 534         ifi = NLMSG_DATA(h);
 535
 536         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
 537
 538         attrlen = h->nlmsg_len - _nlmsg_len;
 539         if (attrlen < 0)
 540                 return;
 541
 542         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
 543
 544         rta_len = RTA_ALIGN(sizeof(struct rtattr));
 545         while (RTA_OK(attr, attrlen)) {
 546                 if (attr->rta_type == IFLA_IFNAME) {
 547                         wpa_driver_nl80211_event_link(
 548                                 drv, ctx,
 549                                 ((char *) attr) + rta_len,
 550                                 attr->rta_len - rta_len, 1);
 551                 }
 552                 attr = RTA_NEXT(attr, attrlen);
 553         }
 554 }
 555
 556
 557 static void wpa_driver_nl80211_event_receive_link(int sock, void *eloop_ctx,
 558                                                   void *sock_ctx)
 559 {
 560         char buf[8192];
 561         int left;
 562         struct sockaddr_nl from;
 563         socklen_t fromlen;
 564         struct nlmsghdr *h;
 565         int max_events = 10;
 566
 567 try_again:
 568         fromlen = sizeof(from);
 569         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
 570                         (struct sockaddr *) &from, &fromlen);
 571         if (left < 0) {
 572                 if (errno != EINTR && errno != EAGAIN)
 573                         perror("recvfrom(netlink)");
 574                 return;
 575         }
 576
 577         h = (struct nlmsghdr *) buf;
 578         while (left >= (int) sizeof(*h)) {
 579                 int len, plen;
 580
 581                 len = h->nlmsg_len;
 582                 plen = len - sizeof(*h);
 583                 if (len > left || plen < 0) {
 584                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
 585                                    "len=%d left=%d plen=%d",
 586                                    len, left, plen);
 587                         break;
 588                 }
 589
 590                 switch (h->nlmsg_type) {
 591                 case RTM_NEWLINK:
 592                         wpa_driver_nl80211_event_rtm_newlink(eloop_ctx, sock_ctx,
 593                                                           h, plen);
 594                         break;
 595                 case RTM_DELLINK:
 596                         wpa_driver_nl80211_event_rtm_dellink(eloop_ctx, sock_ctx,
 597                                                           h, plen);
 598                         break;
 599                 }
 600
 601                 len = NLMSG_ALIGN(len);
 602                 left -= len;
 603                 h = (struct nlmsghdr *) ((char *) h + len);
 604         }
 605
 606         if (left > 0) {
 607                 wpa_printf(MSG_DEBUG, "%d extra bytes in the end of netlink "
 608                            "message", left);
 609         }
 610
 611         if (--max_events > 0) {
 612                 /*
 613                  * Try to receive all events in one eloop call in order to
 614                  * limit race condition on cases where AssocInfo event, Assoc
 615                  * event, and EAPOL frames are received more or less at the
 616                  * same time. We want to process the event messages first
 617                  * before starting EAPOL processing.
 618                  */
 619                 goto try_again;
 620         }
 621 }
 622
 623
 624 static int no_seq_check(struct nl_msg *msg, void *arg)
 625 {
 626         return NL_OK;
 627 }
 628
 629
 630 static void mlme_event_auth(struct wpa_driver_nl80211_data *drv,
 631                             const u8 *frame, size_t len)
 632 {
 633         const struct ieee80211_mgmt *mgmt;
 634         union wpa_event_data event;
 635
 636         mgmt = (const struct ieee80211_mgmt *) frame;
 637         if (len < 24 + sizeof(mgmt->u.auth)) {
 638                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 639                            "frame");
 640                 return;
 641         }
 642
 643         os_memset(&event, 0, sizeof(event));
 644         os_memcpy(event.auth.peer, mgmt->sa, ETH_ALEN);
 645         event.auth.auth_type = le_to_host16(mgmt->u.auth.auth_alg);
 646         event.auth.status_code = le_to_host16(mgmt->u.auth.status_code);
 647         if (len > 24 + sizeof(mgmt->u.auth)) {
 648                 event.auth.ies = mgmt->u.auth.variable;
 649                 event.auth.ies_len = len - 24 - sizeof(mgmt->u.auth);
 650         }
 651
 652         wpa_supplicant_event(drv->ctx, EVENT_AUTH, &event);
 653 }
 654
 655
 656 static void mlme_event_assoc(struct wpa_driver_nl80211_data *drv,
 657                             const u8 *frame, size_t len)
 658 {
 659         const struct ieee80211_mgmt *mgmt;
 660         union wpa_event_data event;
 661         u16 status;
 662
 663         mgmt = (const struct ieee80211_mgmt *) frame;
 664         if (len < 24 + sizeof(mgmt->u.assoc_resp)) {
 665                 wpa_printf(MSG_DEBUG, "nl80211: Too short association event "
 666                            "frame");
 667                 return;
 668         }
 669
 670         status = le_to_host16(mgmt->u.assoc_resp.status_code);
 671         if (status != WLAN_STATUS_SUCCESS) {
 672                 os_memset(&event, 0, sizeof(event));
 673                 if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 674                         event.assoc_reject.resp_ies =
 675                                 (u8 *) mgmt->u.assoc_resp.variable;
 676                         event.assoc_reject.resp_ies_len =
 677                                 len - 24 - sizeof(mgmt->u.assoc_resp);
 678                 }
 679                 event.assoc_reject.status_code = status;
 680
 681                 wpa_supplicant_event(drv->ctx, EVENT_ASSOC_REJECT, &event);
 682                 return;
 683         }
 684
 685         drv->associated = 1;
 686         os_memcpy(drv->bssid, mgmt->sa, ETH_ALEN);
 687
 688         os_memset(&event, 0, sizeof(event));
 689         if (len > 24 + sizeof(mgmt->u.assoc_resp)) {
 690                 event.assoc_info.resp_ies = (u8 *) mgmt->u.assoc_resp.variable;
 691                 event.assoc_info.resp_ies_len =
 692                         len - 24 - sizeof(mgmt->u.assoc_resp);
 693         }
 694
 695         wpa_supplicant_event(drv->ctx, EVENT_ASSOC, &event);
 696 }
 697
 698
 699 static void mlme_event(struct wpa_driver_nl80211_data *drv,
 700                        enum nl80211_commands cmd, struct nlattr *frame)
 701 {
 702         if (frame == NULL) {
 703                 wpa_printf(MSG_DEBUG, "nl80211: MLME event %d without frame "
 704                            "data", cmd);
 705                 return;
 706         }
 707
 708         wpa_printf(MSG_DEBUG, "nl80211: MLME event %d", cmd);
 709         wpa_hexdump(MSG_MSGDUMP, "nl80211: MLME event frame",
 710                     nla_data(frame), nla_len(frame));
 711
 712         switch (cmd) {
 713         case NL80211_CMD_AUTHENTICATE:
 714                 mlme_event_auth(drv, nla_data(frame), nla_len(frame));
 715                 break;
 716         case NL80211_CMD_ASSOCIATE:
 717                 mlme_event_assoc(drv, nla_data(frame), nla_len(frame));
 718                 break;
 719         case NL80211_CMD_DEAUTHENTICATE:
 720                 drv->associated = 0;
 721                 wpa_supplicant_event(drv->ctx, EVENT_DEAUTH, NULL);
 722                 break;
 723         case NL80211_CMD_DISASSOCIATE:
 724                 drv->associated = 0;
 725                 wpa_supplicant_event(drv->ctx, EVENT_DISASSOC, NULL);
 726                 break;
 727         default:
 728                 break;
 729         }
 730 }
 731
 732
 733 static int process_event(struct nl_msg *msg, void *arg)
 734 {
 735         struct wpa_driver_nl80211_data *drv = arg;
 736         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 737         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 738
 739         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 740                   genlmsg_attrlen(gnlh, 0), NULL);
 741
 742         if (tb[NL80211_ATTR_IFINDEX]) {
 743                 int ifindex = nla_get_u32(tb[NL80211_ATTR_IFINDEX]);
 744                 if (ifindex != drv->ifindex) {
 745                         wpa_printf(MSG_DEBUG, "nl80211: Ignored event (cmd=%d)"
 746                                    " for foreign interface (ifindex %d)",
 747                                    gnlh->cmd, ifindex);
 748                         return NL_SKIP;
 749                 }
 750         }
 751
 752         switch (gnlh->cmd) {
 753         case NL80211_CMD_NEW_SCAN_RESULTS:
 754                 wpa_printf(MSG_DEBUG, "nl80211: New scan results available");
 755                 drv->scan_complete_events = 1;
 756                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 757                                      drv->ctx);
 758                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 759                 break;
 760         case NL80211_CMD_SCAN_ABORTED:
 761                 wpa_printf(MSG_DEBUG, "nl80211: Scan aborted");
 762                 /*
 763                  * Need to indicate that scan results are available in order
 764                  * not to make wpa_supplicant stop its scanning.
 765                  */
 766                 eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv,
 767                                      drv->ctx);
 768                 wpa_supplicant_event(drv->ctx, EVENT_SCAN_RESULTS, NULL);
 769                 break;
 770         case NL80211_CMD_AUTHENTICATE:
 771         case NL80211_CMD_ASSOCIATE:
 772         case NL80211_CMD_DEAUTHENTICATE:
 773         case NL80211_CMD_DISASSOCIATE:
 774                 mlme_event(drv, gnlh->cmd, tb[NL80211_ATTR_FRAME]);
 775                 break;
 776         default:
 777                 wpa_printf(MSG_DEBUG, "nl80211: Ignored unknown event "
 778                            "(cmd=%d)", gnlh->cmd);
 779                 break;
 780         }
 781
 782         return NL_SKIP;
 783 }
 784
 785
 786 static void wpa_driver_nl80211_event_receive(int sock, void *eloop_ctx,
 787                                              void *sock_ctx)
 788 {
 789         struct nl_cb *cb;
 790         struct wpa_driver_nl80211_data *drv = eloop_ctx;
 791
 792         wpa_printf(MSG_DEBUG, "nl80211: Event message available");
 793
 794         cb = nl_cb_clone(drv->nl_cb);
 795         if (!cb)
 796                 return;
 797         nl_cb_set(cb, NL_CB_SEQ_CHECK, NL_CB_CUSTOM, no_seq_check, NULL);
 798         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, process_event, drv);
 799         nl_recvmsgs(drv->nl_handle, cb);
 800         nl_cb_put(cb);
 801 }
 802
 803
 804 static int wpa_driver_nl80211_get_ifflags_ifname(struct wpa_driver_nl80211_data *drv,
 805                                               const char *ifname, int *flags)
 806 {
 807         struct ifreq ifr;
 808
 809         os_memset(&ifr, 0, sizeof(ifr));
 810         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 811         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, (caddr_t) &ifr) < 0) {
 812                 perror("ioctl[SIOCGIFFLAGS]");
 813                 return -1;
 814         }
 815         *flags = ifr.ifr_flags & 0xffff;
 816         return 0;
 817 }
 818
 819
 820 /**
 821  * wpa_driver_nl80211_get_ifflags - Get interface flags (SIOCGIFFLAGS)
 822  * @drv: driver_nl80211 private data
 823  * @flags: Pointer to returned flags value
 824  * Returns: 0 on success, -1 on failure
 825  */
 826 static int wpa_driver_nl80211_get_ifflags(struct wpa_driver_nl80211_data *drv,
 827                                           int *flags)
 828 {
 829         return wpa_driver_nl80211_get_ifflags_ifname(drv, drv->ifname, flags);
 830 }
 831
 832
 833 static int wpa_driver_nl80211_set_ifflags_ifname(
 834         struct wpa_driver_nl80211_data *drv,
 835         const char *ifname, int flags)
 836 {
 837         struct ifreq ifr;
 838
 839         os_memset(&ifr, 0, sizeof(ifr));
 840         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 841         ifr.ifr_flags = flags & 0xffff;
 842         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, (caddr_t) &ifr) < 0) {
 843                 perror("SIOCSIFFLAGS");
 844                 return -1;
 845         }
 846         return 0;
 847 }
 848
 849
 850 /**
 851  * wpa_driver_nl80211_set_ifflags - Set interface flags (SIOCSIFFLAGS)
 852  * @drv: driver_nl80211 private data
 853  * @flags: New value for flags
 854  * Returns: 0 on success, -1 on failure
 855  */
 856 static int wpa_driver_nl80211_set_ifflags(struct wpa_driver_nl80211_data *drv,
 857                                           int flags)
 858 {
 859         return wpa_driver_nl80211_set_ifflags_ifname(drv, drv->ifname, flags);
 860 }
 861
 862
 863 /**
 864  * wpa_driver_nl80211_set_country - ask nl80211 to set the regulatory domain
 865  * @priv: driver_nl80211 private data
 866  * @alpha2_arg: country to which to switch to
 867  * Returns: 0 on success, -1 on failure
 868  *
 869  * This asks nl80211 to set the regulatory domain for given
 870  * country ISO / IEC alpha2.
 871  */
 872 static int wpa_driver_nl80211_set_country(void *priv, const char *alpha2_arg)
 873 {
 874         struct wpa_driver_nl80211_data *drv = priv;
 875         char alpha2[3];
 876         struct nl_msg *msg;
 877
 878         msg = nlmsg_alloc();
 879         if (!msg)
 880                 goto nla_put_failure;
 881
 882         alpha2[0] = alpha2_arg[0];
 883         alpha2[1] = alpha2_arg[1];
 884         alpha2[2] = '\0';
 885
 886         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 887                     0, NL80211_CMD_REQ_SET_REG, 0);
 888
 889         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
 890         if (send_and_recv_msgs(drv, msg, NULL, NULL))
 891                 return -EINVAL;
 892         return 0;
 893 nla_put_failure:
 894         return -EINVAL;
 895 }
 896
 897
 898 struct wiphy_info_data {
 899         int max_scan_ssids;
 900         int ap_supported;
 901 };
 902
 903
 904 static int wiphy_info_handler(struct nl_msg *msg, void *arg)
 905 {
 906         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 907         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 908         struct wiphy_info_data *info = arg;
 909
 910         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 911                   genlmsg_attrlen(gnlh, 0), NULL);
 912
 913         if (tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS])
 914                 info->max_scan_ssids =
 915                         nla_get_u8(tb[NL80211_ATTR_MAX_NUM_SCAN_SSIDS]);
 916
 917         if (tb[NL80211_ATTR_SUPPORTED_IFTYPES]) {
 918                 struct nlattr *nl_mode;
 919                 int i;
 920                 nla_for_each_nested(nl_mode,
 921                                     tb[NL80211_ATTR_SUPPORTED_IFTYPES], i) {
 922                         if (nl_mode->nla_type == NL80211_IFTYPE_AP) {
 923                                 info->ap_supported = 1;
 924                                 break;
 925                         }
 926                 }
 927         }
 928
 929         return NL_SKIP;
 930 }
 931
 932
 933 static int wpa_driver_nl80211_get_info(struct wpa_driver_nl80211_data *drv,
 934                                        struct wiphy_info_data *info)
 935 {
 936         struct nl_msg *msg;
 937
 938         os_memset(info, 0, sizeof(*info));
 939         msg = nlmsg_alloc();
 940         if (!msg)
 941                 return -1;
 942
 943         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 944                     0, NL80211_CMD_GET_WIPHY, 0);
 945
 946         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
 947
 948         if (send_and_recv_msgs(drv, msg, wiphy_info_handler, info) == 0)
 949                 return 0;
 950         msg = NULL;
 951 nla_put_failure:
 952         nlmsg_free(msg);
 953         return -1;
 954 }
 955
 956
 957 static void wpa_driver_nl80211_capa(struct wpa_driver_nl80211_data *drv)
 958 {
 959         struct wiphy_info_data info;
 960         if (wpa_driver_nl80211_get_info(drv, &info))
 961                 return;
 962         drv->has_capability = 1;
 963         /* For now, assume TKIP, CCMP, WPA, WPA2 are supported */
 964         drv->capa.key_mgmt = WPA_DRIVER_CAPA_KEY_MGMT_WPA |
 965                 WPA_DRIVER_CAPA_KEY_MGMT_WPA_PSK |
 966                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2 |
 967                 WPA_DRIVER_CAPA_KEY_MGMT_WPA2_PSK;
 968         drv->capa.enc = WPA_DRIVER_CAPA_ENC_WEP40 |
 969                 WPA_DRIVER_CAPA_ENC_WEP104 |
 970                 WPA_DRIVER_CAPA_ENC_TKIP |
 971                 WPA_DRIVER_CAPA_ENC_CCMP;
 972
 973         drv->capa.max_scan_ssids = info.max_scan_ssids;
 974         if (info.ap_supported)
 975                 drv->capa.flags |= WPA_DRIVER_FLAGS_AP;
 976 }
 977
 978
 979 /**
 980  * wpa_driver_nl80211_init - Initialize nl80211 driver interface
 981  * @ctx: context to be used when calling wpa_supplicant functions,
 982  * e.g., wpa_supplicant_event()
 983  * @ifname: interface name, e.g., wlan0
 984  * Returns: Pointer to private data, %NULL on failure
 985  */
 986 static void * wpa_driver_nl80211_init(void *ctx, const char *ifname)
 987 {
 988         int s, ret;
 989         struct sockaddr_nl local;
 990         struct wpa_driver_nl80211_data *drv;
 991
 992         drv = os_zalloc(sizeof(*drv));
 993         if (drv == NULL)
 994                 return NULL;
 995         drv->ctx = ctx;
 996         os_strlcpy(drv->ifname, ifname, sizeof(drv->ifname));
 997 #ifdef CONFIG_AP
 998         drv->monitor_ifidx = -1;
 999         drv->monitor_sock = -1;
1000 #endif /* CONFIG_AP */
1001
1002         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1003         if (drv->nl_cb == NULL) {
1004                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1005                            "callbacks");
1006                 goto err1;
1007         }
1008
1009         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1010         if (drv->nl_handle == NULL) {
1011                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate netlink "
1012                            "callbacks");
1013                 goto err2;
1014         }
1015
1016         if (genl_connect(drv->nl_handle)) {
1017                 wpa_printf(MSG_ERROR, "nl80211: Failed to connect to generic "
1018                            "netlink");
1019                 goto err3;
1020         }
1021
1022         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1023         if (drv->nl_cache == NULL) {
1024                 wpa_printf(MSG_ERROR, "nl80211: Failed to allocate generic "
1025                            "netlink cache");
1026                 goto err3;
1027         }
1028
1029         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1030         if (drv->nl80211 == NULL) {
1031                 wpa_printf(MSG_ERROR, "nl80211: 'nl80211' generic netlink not "
1032                            "found");
1033                 goto err4;
1034         }
1035
1036         ret = nl_get_multicast_id(drv, "nl80211", "scan");
1037         if (ret >= 0)
1038                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1039         if (ret < 0) {
1040                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1041                            "membership for scan events: %d (%s)",
1042                            ret, strerror(-ret));
1043                 goto err4;
1044         }
1045
1046         ret = nl_get_multicast_id(drv, "nl80211", "mlme");
1047         if (ret >= 0)
1048                 ret = nl_socket_add_membership(drv->nl_handle, ret);
1049         if (ret < 0) {
1050                 wpa_printf(MSG_ERROR, "nl80211: Could not add multicast "
1051                            "membership for mlme events: %d (%s)",
1052                            ret, strerror(-ret));
1053                 goto err4;
1054         }
1055         drv->capa.flags |= WPA_DRIVER_FLAGS_SME;
1056
1057         eloop_register_read_sock(nl_socket_get_fd(drv->nl_handle),
1058                                  wpa_driver_nl80211_event_receive, drv, ctx);
1059
1060         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1061         if (drv->ioctl_sock < 0) {
1062                 perror("socket(PF_INET,SOCK_DGRAM)");
1063                 goto err5;
1064         }
1065
1066         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
1067         if (s < 0) {
1068                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
1069                 goto err6;
1070         }
1071
1072         os_memset(&local, 0, sizeof(local));
1073         local.nl_family = AF_NETLINK;
1074         local.nl_groups = RTMGRP_LINK;
1075         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
1076                 perror("bind(netlink)");
1077                 close(s);
1078                 goto err6;
1079         }
1080
1081         eloop_register_read_sock(s, wpa_driver_nl80211_event_receive_link, drv,
1082                                  ctx);
1083         drv->link_event_sock = s;
1084
1085         if (wpa_driver_nl80211_finish_drv_init(drv))
1086                 goto err7;
1087
1088         return drv;
1089
1090 err7:
1091         eloop_unregister_read_sock(drv->link_event_sock);
1092         close(drv->link_event_sock);
1093 err6:
1094         close(drv->ioctl_sock);
1095 err5:
1096         genl_family_put(drv->nl80211);
1097 err4:
1098         nl_cache_free(drv->nl_cache);
1099 err3:
1100         nl_handle_destroy(drv->nl_handle);
1101 err2:
1102         nl_cb_put(drv->nl_cb);
1103 err1:
1104         os_free(drv);
1105         return NULL;
1106 }
1107
1108
1109 static int
1110 wpa_driver_nl80211_finish_drv_init(struct wpa_driver_nl80211_data *drv)
1111 {
1112         int flags;
1113
1114         drv->ifindex = if_nametoindex(drv->ifname);
1115
1116         if (wpa_driver_nl80211_set_mode(drv, 0) < 0) {
1117                 wpa_printf(MSG_DEBUG, "nl80211: Could not configure driver to "
1118                            "use managed mode");
1119         }
1120
1121         if (wpa_driver_nl80211_get_ifflags(drv, &flags) != 0) {
1122                 wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
1123                            drv->ifname);
1124                 return -1;
1125         }
1126         if (!(flags & IFF_UP)) {
1127                 if (wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP) != 0) {
1128                         wpa_printf(MSG_ERROR, "Could not set interface '%s' "
1129                                    "UP", drv->ifname);
1130                         return -1;
1131                 }
1132         }
1133
1134         wpa_driver_nl80211_capa(drv);
1135
1136         wpa_driver_nl80211_send_oper_ifla(drv, 1, IF_OPER_DORMANT);
1137
1138         return 0;
1139 }
1140
1141
1142 /**
1143  * wpa_driver_nl80211_deinit - Deinitialize nl80211 driver interface
1144  * @priv: Pointer to private nl80211 data from wpa_driver_nl80211_init()
1145  *
1146  * Shut down driver interface and processing of driver events. Free
1147  * private data buffer if one was allocated in wpa_driver_nl80211_init().
1148  */
1149 static void wpa_driver_nl80211_deinit(void *priv)
1150 {
1151         struct wpa_driver_nl80211_data *drv = priv;
1152         int flags;
1153
1154 #ifdef CONFIG_AP
1155         if (drv->monitor_ifidx >= 0)
1156                 nl80211_remove_iface(drv, drv->monitor_ifidx);
1157         if (drv->monitor_sock >= 0) {
1158                 eloop_unregister_read_sock(drv->monitor_sock);
1159                 close(drv->monitor_sock);
1160         }
1161 #endif /* CONFIG_AP */
1162
1163         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1164
1165         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED, 0);
1166
1167         wpa_driver_nl80211_send_oper_ifla(priv, 0, IF_OPER_UP);
1168
1169         eloop_unregister_read_sock(drv->link_event_sock);
1170
1171         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0)
1172                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
1173         wpa_driver_nl80211_set_mode(drv, 0);
1174
1175         close(drv->link_event_sock);
1176         close(drv->ioctl_sock);
1177
1178         eloop_unregister_read_sock(nl_socket_get_fd(drv->nl_handle));
1179         genl_family_put(drv->nl80211);
1180         nl_cache_free(drv->nl_cache);
1181         nl_handle_destroy(drv->nl_handle);
1182         nl_cb_put(drv->nl_cb);
1183
1184         os_free(drv);
1185 }
1186
1187
1188 /**
1189  * wpa_driver_nl80211_scan_timeout - Scan timeout to report scan completion
1190  * @eloop_ctx: Unused
1191  * @timeout_ctx: ctx argument given to wpa_driver_nl80211_init()
1192  *
1193  * This function can be used as registered timeout when starting a scan to
1194  * generate a scan completed event if the driver does not report this.
1195  */
1196 static void wpa_driver_nl80211_scan_timeout(void *eloop_ctx, void *timeout_ctx)
1197 {
1198         wpa_printf(MSG_DEBUG, "Scan timeout - try to get results");
1199         wpa_supplicant_event(timeout_ctx, EVENT_SCAN_RESULTS, NULL);
1200 }
1201
1202
1203 /**
1204  * wpa_driver_nl80211_scan - Request the driver to initiate scan
1205  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1206  * @params: Scan parameters
1207  * Returns: 0 on success, -1 on failure
1208  */
1209 static int wpa_driver_nl80211_scan(void *priv,
1210                                    struct wpa_driver_scan_params *params)
1211 {
1212         struct wpa_driver_nl80211_data *drv = priv;
1213         int ret = 0, timeout;
1214         struct nl_msg *msg, *ssids, *freqs;
1215         size_t i;
1216
1217         msg = nlmsg_alloc();
1218         ssids = nlmsg_alloc();
1219         freqs = nlmsg_alloc();
1220         if (!msg || !ssids || !freqs) {
1221                 nlmsg_free(msg);
1222                 nlmsg_free(ssids);
1223                 nlmsg_free(freqs);
1224                 return -1;
1225         }
1226
1227         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1228                     NL80211_CMD_TRIGGER_SCAN, 0);
1229
1230         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1231
1232         for (i = 0; i < params->num_ssids; i++) {
1233                 NLA_PUT(ssids, i + 1, params->ssids[i].ssid_len,
1234                         params->ssids[i].ssid);
1235         }
1236         if (params->num_ssids)
1237                 nla_put_nested(msg, NL80211_ATTR_SCAN_SSIDS, ssids);
1238
1239         if (params->extra_ies) {
1240                 NLA_PUT(msg, NL80211_ATTR_IE, params->extra_ies_len,
1241                         params->extra_ies);
1242         }
1243
1244         if (params->freqs) {
1245                 for (i = 0; params->freqs[i]; i++)
1246                         NLA_PUT_U32(freqs, i + 1, params->freqs[i]);
1247                 nla_put_nested(msg, NL80211_ATTR_SCAN_FREQUENCIES, freqs);
1248         }
1249
1250         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1251         msg = NULL;
1252         if (ret) {
1253                 wpa_printf(MSG_DEBUG, "nl80211: Scan trigger failed: ret=%d "
1254                            "(%s)", ret, strerror(-ret));
1255                 goto nla_put_failure;
1256         }
1257
1258         /* Not all drivers generate "scan completed" wireless event, so try to
1259          * read results after a timeout. */
1260         timeout = 10;
1261         if (drv->scan_complete_events) {
1262                 /*
1263                  * The driver seems to deliver events to notify when scan is
1264                  * complete, so use longer timeout to avoid race conditions
1265                  * with scanning and following association request.
1266                  */
1267                 timeout = 30;
1268         }
1269         wpa_printf(MSG_DEBUG, "Scan requested (ret=%d) - scan timeout %d "
1270                    "seconds", ret, timeout);
1271         eloop_cancel_timeout(wpa_driver_nl80211_scan_timeout, drv, drv->ctx);
1272         eloop_register_timeout(timeout, 0, wpa_driver_nl80211_scan_timeout,
1273                                drv, drv->ctx);
1274
1275 nla_put_failure:
1276         nlmsg_free(ssids);
1277         nlmsg_free(msg);
1278         nlmsg_free(freqs);
1279         return ret;
1280 }
1281
1282
1283 static int bss_info_handler(struct nl_msg *msg, void *arg)
1284 {
1285         struct nlattr *tb[NL80211_ATTR_MAX + 1];
1286         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1287         struct nlattr *bss[NL80211_BSS_MAX + 1];
1288         static struct nla_policy bss_policy[NL80211_BSS_MAX + 1] = {
1289                 [NL80211_BSS_BSSID] = { .type = NLA_UNSPEC },
1290                 [NL80211_BSS_FREQUENCY] = { .type = NLA_U32 },
1291                 [NL80211_BSS_TSF] = { .type = NLA_U64 },
1292                 [NL80211_BSS_BEACON_INTERVAL] = { .type = NLA_U16 },
1293                 [NL80211_BSS_CAPABILITY] = { .type = NLA_U16 },
1294                 [NL80211_BSS_INFORMATION_ELEMENTS] = { .type = NLA_UNSPEC },
1295                 [NL80211_BSS_SIGNAL_MBM] = { .type = NLA_U32 },
1296                 [NL80211_BSS_SIGNAL_UNSPEC] = { .type = NLA_U8 },
1297         };
1298         struct wpa_scan_results *res = arg;
1299         struct wpa_scan_res **tmp;
1300         struct wpa_scan_res *r;
1301         const u8 *ie;
1302         size_t ie_len;
1303
1304         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1305                   genlmsg_attrlen(gnlh, 0), NULL);
1306         if (!tb[NL80211_ATTR_BSS])
1307                 return NL_SKIP;
1308         if (nla_parse_nested(bss, NL80211_BSS_MAX, tb[NL80211_ATTR_BSS],
1309                              bss_policy))
1310                 return NL_SKIP;
1311         if (bss[NL80211_BSS_INFORMATION_ELEMENTS]) {
1312                 ie = nla_data(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1313                 ie_len = nla_len(bss[NL80211_BSS_INFORMATION_ELEMENTS]);
1314         } else {
1315                 ie = NULL;
1316                 ie_len = 0;
1317         }
1318
1319         r = os_zalloc(sizeof(*r) + ie_len);
1320         if (r == NULL)
1321                 return NL_SKIP;
1322         if (bss[NL80211_BSS_BSSID])
1323                 os_memcpy(r->bssid, nla_data(bss[NL80211_BSS_BSSID]),
1324                           ETH_ALEN);
1325         if (bss[NL80211_BSS_FREQUENCY])
1326                 r->freq = nla_get_u32(bss[NL80211_BSS_FREQUENCY]);
1327         if (bss[NL80211_BSS_BEACON_INTERVAL])
1328                 r->beacon_int = nla_get_u16(bss[NL80211_BSS_BEACON_INTERVAL]);
1329         if (bss[NL80211_BSS_CAPABILITY])
1330                 r->caps = nla_get_u16(bss[NL80211_BSS_CAPABILITY]);
1331         r->flags |= WPA_SCAN_NOISE_INVALID;
1332         if (bss[NL80211_BSS_SIGNAL_MBM]) {
1333                 r->level = nla_get_u32(bss[NL80211_BSS_SIGNAL_MBM]);
1334                 r->level /= 100; /* mBm to dBm */
1335                 r->flags |= WPA_SCAN_LEVEL_DBM | WPA_SCAN_QUAL_INVALID;
1336         } else if (bss[NL80211_BSS_SIGNAL_UNSPEC]) {
1337                 r->level = nla_get_u8(bss[NL80211_BSS_SIGNAL_UNSPEC]);
1338                 r->flags |= WPA_SCAN_LEVEL_INVALID;
1339         } else
1340                 r->flags |= WPA_SCAN_LEVEL_INVALID | WPA_SCAN_QUAL_INVALID;
1341         if (bss[NL80211_BSS_TSF])
1342                 r->tsf = nla_get_u64(bss[NL80211_BSS_TSF]);
1343         r->ie_len = ie_len;
1344         if (ie)
1345                 os_memcpy(r + 1, ie, ie_len);
1346
1347         tmp = os_realloc(res->res,
1348                          (res->num + 1) * sizeof(struct wpa_scan_res *));
1349         if (tmp == NULL) {
1350                 os_free(r);
1351                 return NL_SKIP;
1352         }
1353         tmp[res->num++] = r;
1354         res->res = tmp;
1355
1356         return NL_SKIP;
1357 }
1358
1359
1360 /**
1361  * wpa_driver_nl80211_get_scan_results - Fetch the latest scan results
1362  * @priv: Pointer to private wext data from wpa_driver_nl80211_init()
1363  * Returns: Scan results on success, -1 on failure
1364  */
1365 static struct wpa_scan_results *
1366 wpa_driver_nl80211_get_scan_results(void *priv)
1367 {
1368         struct wpa_driver_nl80211_data *drv = priv;
1369         struct nl_msg *msg;
1370         struct wpa_scan_results *res;
1371         int ret;
1372
1373         res = os_zalloc(sizeof(*res));
1374         if (res == NULL)
1375                 return 0;
1376         msg = nlmsg_alloc();
1377         if (!msg)
1378                 goto nla_put_failure;
1379
1380         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, NLM_F_DUMP,
1381                     NL80211_CMD_GET_SCAN, 0);
1382         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1383
1384         ret = send_and_recv_msgs(drv, msg, bss_info_handler, res);
1385         msg = NULL;
1386         if (ret == 0) {
1387                 wpa_printf(MSG_DEBUG, "Received scan results (%lu BSSes)",
1388                            (unsigned long) res->num);
1389                 return res;
1390         }
1391         wpa_printf(MSG_DEBUG, "nl80211: Scan result fetch failed: ret=%d "
1392                    "(%s)", ret, strerror(-ret));
1393 nla_put_failure:
1394         nlmsg_free(msg);
1395         wpa_scan_results_free(res);
1396         return NULL;
1397 }
1398
1399
1400 static int wpa_driver_nl80211_set_key(void *priv, wpa_alg alg,
1401                                       const u8 *addr, int key_idx,
1402                                       int set_tx, const u8 *seq,
1403                                       size_t seq_len,
1404                                       const u8 *key, size_t key_len)
1405 {
1406         struct wpa_driver_nl80211_data *drv = priv;
1407         int err;
1408         struct nl_msg *msg;
1409
1410         wpa_printf(MSG_DEBUG, "%s: alg=%d addr=%p key_idx=%d set_tx=%d "
1411                    "seq_len=%lu key_len=%lu",
1412                    __func__, alg, addr, key_idx, set_tx,
1413                    (unsigned long) seq_len, (unsigned long) key_len);
1414
1415         msg = nlmsg_alloc();
1416         if (msg == NULL)
1417                 return -1;
1418
1419         if (alg == WPA_ALG_NONE) {
1420                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1421                             NL80211_CMD_DEL_KEY, 0);
1422         } else {
1423                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1424                             NL80211_CMD_NEW_KEY, 0);
1425                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
1426                 switch (alg) {
1427                 case WPA_ALG_WEP:
1428                         if (key_len == 5)
1429                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1430                                             0x000FAC01);
1431                         else
1432                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
1433                                             0x000FAC05);
1434                         break;
1435                 case WPA_ALG_TKIP:
1436                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
1437                         break;
1438                 case WPA_ALG_CCMP:
1439                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
1440                         break;
1441 #ifdef CONFIG_IEEE80211W
1442                 case WPA_ALG_IGTK:
1443                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
1444                         break;
1445 #endif /* CONFIG_IEEE80211W */
1446                 default:
1447                         nlmsg_free(msg);
1448                         return -1;
1449                 }
1450         }
1451
1452         if (addr && os_memcmp(addr, "\xff\xff\xff\xff\xff\xff", ETH_ALEN) != 0)
1453         {
1454                 wpa_printf(MSG_DEBUG, "   addr=" MACSTR, MAC2STR(addr));
1455                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1456         }
1457         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1458         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1459
1460         err = send_and_recv_msgs(drv, msg, NULL, NULL);
1461         if (err) {
1462                 wpa_printf(MSG_DEBUG, "nl80211: set_key failed; err=%d", err);
1463                 return -1;
1464         }
1465
1466         if (set_tx && alg != WPA_ALG_NONE) {
1467                 msg = nlmsg_alloc();
1468                 if (msg == NULL)
1469                         return -1;
1470
1471                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1472                             0, NL80211_CMD_SET_KEY, 0);
1473                 NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, key_idx);
1474                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1475                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
1476
1477                 err = send_and_recv_msgs(drv, msg, NULL, NULL);
1478                 if (err) {
1479                         wpa_printf(MSG_DEBUG, "nl80211: set default key "
1480                                    "failed; err=%d", err);
1481                         return -1;
1482                 }
1483         }
1484
1485         return 0;
1486
1487 nla_put_failure:
1488         return -ENOBUFS;
1489 }
1490
1491
1492 static int wpa_driver_nl80211_mlme(struct wpa_driver_nl80211_data *drv,
1493                                    const u8 *addr, int cmd, u16 reason_code)
1494 {
1495         int ret = -1;
1496         struct nl_msg *msg;
1497
1498         msg = nlmsg_alloc();
1499         if (!msg)
1500                 return -1;
1501
1502         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0, cmd, 0);
1503
1504         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1505         NLA_PUT_U16(msg, NL80211_ATTR_REASON_CODE, reason_code);
1506         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1507
1508         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1509         msg = NULL;
1510         if (ret) {
1511                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1512                            "(%s)", ret, strerror(-ret));
1513                 goto nla_put_failure;
1514         }
1515         ret = 0;
1516
1517 nla_put_failure:
1518         nlmsg_free(msg);
1519         return ret;
1520 }
1521
1522
1523 static int wpa_driver_nl80211_deauthenticate(void *priv, const u8 *addr,
1524                                              int reason_code)
1525 {
1526         struct wpa_driver_nl80211_data *drv = priv;
1527         wpa_printf(MSG_DEBUG, "%s", __func__);
1528         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DEAUTHENTICATE,
1529                                        reason_code);
1530 }
1531
1532
1533 static int wpa_driver_nl80211_disassociate(void *priv, const u8 *addr,
1534                                            int reason_code)
1535 {
1536         struct wpa_driver_nl80211_data *drv = priv;
1537         wpa_printf(MSG_DEBUG, "%s", __func__);
1538         return wpa_driver_nl80211_mlme(drv, addr, NL80211_CMD_DISASSOCIATE,
1539                                        reason_code);
1540 }
1541
1542
1543 static int wpa_driver_nl80211_authenticate(
1544         void *priv, struct wpa_driver_auth_params *params)
1545 {
1546         struct wpa_driver_nl80211_data *drv = priv;
1547         int ret = -1, i;
1548         struct nl_msg *msg;
1549         enum nl80211_auth_type type;
1550
1551         drv->associated = 0;
1552
1553         msg = nlmsg_alloc();
1554         if (!msg)
1555                 return -1;
1556
1557         wpa_printf(MSG_DEBUG, "nl80211: Authenticate (ifindex=%d)",
1558                    drv->ifindex);
1559
1560         for (i = 0; i < 4; i++) {
1561                 if (!params->wep_key[i])
1562                         continue;
1563                 wpa_driver_nl80211_set_key(drv, WPA_ALG_WEP, NULL, i,
1564                                            i == params->wep_tx_keyidx, NULL, 0,
1565                                            params->wep_key[i],
1566                                            params->wep_key_len[i]);
1567         }
1568
1569         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1570                     NL80211_CMD_AUTHENTICATE, 0);
1571
1572         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1573         if (params->bssid) {
1574                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
1575                            MAC2STR(params->bssid));
1576                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
1577         }
1578         if (params->freq) {
1579                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
1580                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
1581         }
1582         if (params->ssid) {
1583                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
1584                                   params->ssid, params->ssid_len);
1585                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
1586                         params->ssid);
1587         }
1588         wpa_hexdump(MSG_DEBUG, "  * IEs", params->ie, params->ie_len);
1589         if (params->ie)
1590                 NLA_PUT(msg, NL80211_ATTR_IE, params->ie_len, params->ie);
1591         /*
1592          * TODO: if multiple auth_alg options enabled, try them one by one if
1593          * the AP rejects authentication due to unknown auth alg
1594          */
1595         if (params->auth_alg & AUTH_ALG_OPEN_SYSTEM)
1596                 type = NL80211_AUTHTYPE_OPEN_SYSTEM;
1597         else if (params->auth_alg & AUTH_ALG_SHARED_KEY)
1598                 type = NL80211_AUTHTYPE_SHARED_KEY;
1599         else if (params->auth_alg & AUTH_ALG_LEAP)
1600                 type = NL80211_AUTHTYPE_NETWORK_EAP;
1601         else if (params->auth_alg & AUTH_ALG_FT)
1602                 type = NL80211_AUTHTYPE_FT;
1603         else
1604                 goto nla_put_failure;
1605         wpa_printf(MSG_DEBUG, "  * Auth Type %d", type);
1606         NLA_PUT_U32(msg, NL80211_ATTR_AUTH_TYPE, type);
1607
1608         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1609         msg = NULL;
1610         if (ret) {
1611                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
1612                            "(%s)", ret, strerror(-ret));
1613                 goto nla_put_failure;
1614         }
1615         ret = 0;
1616         wpa_printf(MSG_DEBUG, "nl80211: Authentication request send "
1617                    "successfully");
1618
1619 nla_put_failure:
1620         nlmsg_free(msg);
1621         return ret;
1622 }
1623
1624
1625 #ifdef CONFIG_AP
1626
1627 struct phy_info_arg {
1628         u16 *num_modes;
1629         struct hostapd_hw_modes *modes;
1630 };
1631
1632 static int phy_info_handler(struct nl_msg *msg, void *arg)
1633 {
1634         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1635         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1636         struct phy_info_arg *phy_info = arg;
1637
1638         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1639
1640         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1641         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1642                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1643                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1644                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1645                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1646                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1647                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1648         };
1649
1650         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1651         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1652                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1653                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1654         };
1655
1656         struct nlattr *nl_band;
1657         struct nlattr *nl_freq;
1658         struct nlattr *nl_rate;
1659         int rem_band, rem_freq, rem_rate;
1660         struct hostapd_hw_modes *mode;
1661         int idx, mode_is_set;
1662
1663         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1664                   genlmsg_attrlen(gnlh, 0), NULL);
1665
1666         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1667                 return NL_SKIP;
1668
1669         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1670                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1671                 if (!mode)
1672                         return NL_SKIP;
1673                 phy_info->modes = mode;
1674
1675                 mode_is_set = 0;
1676
1677                 mode = &phy_info->modes[*(phy_info->num_modes)];
1678                 memset(mode, 0, sizeof(*mode));
1679                 *(phy_info->num_modes) += 1;
1680
1681                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1682                           nla_len(nl_band), NULL);
1683
1684                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
1685                         mode->ht_capab = nla_get_u16(
1686                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
1687                 }
1688
1689                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1690                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1691                                   nla_len(nl_freq), freq_policy);
1692                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1693                                 continue;
1694                         mode->num_channels++;
1695                 }
1696
1697                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1698                 if (!mode->channels)
1699                         return NL_SKIP;
1700
1701                 idx = 0;
1702
1703                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1704                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1705                                   nla_len(nl_freq), freq_policy);
1706                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1707                                 continue;
1708
1709                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1710                         mode->channels[idx].flag = 0;
1711
1712                         if (!mode_is_set) {
1713                                 /* crude heuristic */
1714                                 if (mode->channels[idx].freq < 4000)
1715                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1716                                 else
1717                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1718                                 mode_is_set = 1;
1719                         }
1720
1721                         /* crude heuristic */
1722                         if (mode->channels[idx].freq < 4000)
1723                                 if (mode->channels[idx].freq == 2848)
1724                                         mode->channels[idx].chan = 14;
1725                                 else
1726                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1727                         else
1728                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1729
1730                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1731                                 mode->channels[idx].flag |=
1732                                         HOSTAPD_CHAN_DISABLED;
1733                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1734                                 mode->channels[idx].flag |=
1735                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1736                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1737                                 mode->channels[idx].flag |=
1738                                         HOSTAPD_CHAN_NO_IBSS;
1739                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1740                                 mode->channels[idx].flag |=
1741                                         HOSTAPD_CHAN_RADAR;
1742
1743                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1744                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1745                                 mode->channels[idx].max_tx_power =
1746                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1747
1748                         idx++;
1749                 }
1750
1751                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1752                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1753                                   nla_len(nl_rate), rate_policy);
1754                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1755                                 continue;
1756                         mode->num_rates++;
1757                 }
1758
1759                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1760                 if (!mode->rates)
1761                         return NL_SKIP;
1762
1763                 idx = 0;
1764
1765                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1766                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1767                                   nla_len(nl_rate), rate_policy);
1768                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1769                                 continue;
1770                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1771
1772                         /* crude heuristic */
1773                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1774                             mode->rates[idx].rate > 200)
1775                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1776
1777                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1778                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1779
1780                         idx++;
1781                 }
1782         }
1783
1784         return NL_SKIP;
1785 }
1786
1787 static struct hostapd_hw_modes *
1788 wpa_driver_nl80211_add_11b(struct hostapd_hw_modes *modes, u16 *num_modes)
1789 {
1790         u16 m;
1791         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
1792         int i, mode11g_idx = -1;
1793
1794         /* If only 802.11g mode is included, use it to construct matching
1795          * 802.11b mode data. */
1796
1797         for (m = 0; m < *num_modes; m++) {
1798                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
1799                         return modes; /* 802.11b already included */
1800                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
1801                         mode11g_idx = m;
1802         }
1803
1804         if (mode11g_idx < 0)
1805                 return modes; /* 2.4 GHz band not supported at all */
1806
1807         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
1808         if (nmodes == NULL)
1809                 return modes; /* Could not add 802.11b mode */
1810
1811         mode = &nmodes[*num_modes];
1812         os_memset(mode, 0, sizeof(*mode));
1813         (*num_modes)++;
1814         modes = nmodes;
1815
1816         mode->mode = HOSTAPD_MODE_IEEE80211B;
1817
1818         mode11g = &modes[mode11g_idx];
1819         mode->num_channels = mode11g->num_channels;
1820         mode->channels = os_malloc(mode11g->num_channels *
1821                                    sizeof(struct hostapd_channel_data));
1822         if (mode->channels == NULL) {
1823                 (*num_modes)--;
1824                 return modes; /* Could not add 802.11b mode */
1825         }
1826         os_memcpy(mode->channels, mode11g->channels,
1827                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
1828
1829         mode->num_rates = 0;
1830         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
1831         if (mode->rates == NULL) {
1832                 os_free(mode->channels);
1833                 (*num_modes)--;
1834                 return modes; /* Could not add 802.11b mode */
1835         }
1836
1837         for (i = 0; i < mode11g->num_rates; i++) {
1838                 if (mode11g->rates[i].rate > 110 ||
1839                     mode11g->rates[i].flags &
1840                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
1841                         continue;
1842                 mode->rates[mode->num_rates] = mode11g->rates[i];
1843                 mode->num_rates++;
1844                 if (mode->num_rates == 4)
1845                         break;
1846         }
1847
1848         if (mode->num_rates == 0) {
1849                 os_free(mode->channels);
1850                 os_free(mode->rates);
1851                 (*num_modes)--;
1852                 return modes; /* No 802.11b rates */
1853         }
1854
1855         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
1856                    "information");
1857
1858         return modes;
1859 }
1860
1861
1862 static struct hostapd_hw_modes *
1863 wpa_driver_nl80211_get_hw_feature_data(void *priv, u16 *num_modes, u16 *flags)
1864 {
1865         struct wpa_driver_nl80211_data *drv = priv;
1866         struct nl_msg *msg;
1867         struct phy_info_arg result = {
1868                 .num_modes = num_modes,
1869                 .modes = NULL,
1870         };
1871
1872         *num_modes = 0;
1873         *flags = 0;
1874
1875         msg = nlmsg_alloc();
1876         if (!msg)
1877                 return NULL;
1878
1879         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1880                     0, NL80211_CMD_GET_WIPHY, 0);
1881
1882         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1883
1884         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1885                 return wpa_driver_nl80211_add_11b(result.modes, num_modes);
1886  nla_put_failure:
1887         return NULL;
1888 }
1889
1890
1891 static int wpa_driver_nl80211_send_frame(struct wpa_driver_nl80211_data *drv,
1892                                          const void *data, size_t len,
1893                                          int encrypt)
1894 {
1895         __u8 rtap_hdr[] = {
1896                 0x00, 0x00, /* radiotap version */
1897                 0x0e, 0x00, /* radiotap length */
1898                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
1899                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
1900                 0x00,       /* padding */
1901                 0x00, 0x00, /* RX and TX flags to indicate that */
1902                 0x00, 0x00, /* this is the injected frame directly */
1903         };
1904         struct iovec iov[2] = {
1905                 {
1906                         .iov_base = &rtap_hdr,
1907                         .iov_len = sizeof(rtap_hdr),
1908                 },
1909                 {
1910                         .iov_base = (void *) data,
1911                         .iov_len = len,
1912                 }
1913         };
1914         struct msghdr msg = {
1915                 .msg_name = NULL,
1916                 .msg_namelen = 0,
1917                 .msg_iov = iov,
1918                 .msg_iovlen = 2,
1919                 .msg_control = NULL,
1920                 .msg_controllen = 0,
1921                 .msg_flags = 0,
1922         };
1923
1924         if (encrypt)
1925                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
1926
1927         return sendmsg(drv->monitor_sock, &msg, 0);
1928 }
1929
1930
1931 static int wpa_driver_nl80211_send_mlme(void *priv, const u8 *data,
1932                                         size_t data_len)
1933 {
1934         struct wpa_driver_nl80211_data *drv = priv;
1935         struct ieee80211_mgmt *mgmt;
1936         int do_not_encrypt = 0;
1937         u16 fc;
1938
1939         mgmt = (struct ieee80211_mgmt *) data;
1940         fc = le_to_host16(mgmt->frame_control);
1941
1942         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
1943             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
1944                 /*
1945                  * Only one of the authentication frame types is encrypted.
1946                  * In order for static WEP encryption to work properly (i.e.,
1947                  * to not encrypt the frame), we need to tell mac80211 about
1948                  * the frames that must not be encrypted.
1949                  */
1950                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
1951                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
1952                 if (auth_alg == WLAN_AUTH_OPEN ||
1953                     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
1954                         do_not_encrypt = 1;
1955         }
1956
1957         return wpa_driver_nl80211_send_frame(drv, data, data_len,
1958                                              !do_not_encrypt);
1959 }
1960
1961
1962 static int wpa_driver_nl80211_set_beacon(void *priv,
1963                                          const u8 *head, size_t head_len,
1964                                          const u8 *tail, size_t tail_len,
1965                                          int dtim_period)
1966 {
1967         struct wpa_driver_nl80211_data *drv = priv;
1968         struct nl_msg *msg;
1969         u8 cmd = NL80211_CMD_NEW_BEACON;
1970         int ret;
1971
1972         msg = nlmsg_alloc();
1973         if (!msg)
1974                 return -ENOMEM;
1975
1976         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (beacon_set=%d)",
1977                    drv->beacon_set);
1978         if (drv->beacon_set)
1979                 cmd = NL80211_CMD_SET_BEACON;
1980
1981         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1982                     0, cmd, 0);
1983         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1984         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1985         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
1986         if (!drv->beacon_int)
1987                 drv->beacon_int = 100;
1988         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
1989         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
1990
1991         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1992         if (ret) {
1993                 wpa_printf(MSG_DEBUG, "nl80211: Beacon set failed: %d (%s)",
1994                            ret, strerror(-ret));
1995         } else
1996                 drv->beacon_set = 1;
1997         return ret;
1998  nla_put_failure:
1999         return -ENOBUFS;
2000 }
2001
2002
2003 static int wpa_driver_nl80211_set_beacon_int(void *priv, int value)
2004 {
2005         struct wpa_driver_nl80211_data *drv = priv;
2006         struct nl_msg *msg;
2007
2008         drv->beacon_int = value;
2009
2010         if (!drv->beacon_set)
2011                 return 0;
2012
2013         msg = nlmsg_alloc();
2014         if (!msg)
2015                 return -ENOMEM;
2016
2017         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
2018                    "(beacon_set=%d)", value, drv->beacon_set);
2019         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2020                     0, NL80211_CMD_SET_BEACON, 0);
2021         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2022
2023         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
2024
2025         return send_and_recv_msgs(drv, msg, NULL, NULL);
2026  nla_put_failure:
2027         return -ENOBUFS;
2028 }
2029
2030
2031 static int wpa_driver_nl80211_set_freq2(
2032         struct wpa_driver_nl80211_data *drv,
2033         struct wpa_driver_associate_params *params)
2034 {
2035         struct nl_msg *msg;
2036         int ret;
2037
2038         msg = nlmsg_alloc();
2039         if (!msg)
2040                 return -1;
2041
2042         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2043                     NL80211_CMD_SET_WIPHY, 0);
2044
2045         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2046
2047         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2048
2049         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2050         if (ret == 0)
2051                 return 0;
2052         wpa_printf(MSG_DEBUG, "nl80211: MLME Failed to set channel (freq=%d): "
2053                    "%d (%s)", params->freq, ret, strerror(-ret));
2054 nla_put_failure:
2055         return -1;
2056 }
2057
2058
2059 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv,
2060                                  int ifidx)
2061 {
2062         struct nl_msg *msg;
2063
2064         msg = nlmsg_alloc();
2065         if (!msg)
2066                 goto nla_put_failure;
2067
2068         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2069                     0, NL80211_CMD_DEL_INTERFACE, 0);
2070         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
2071
2072         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
2073                 return;
2074  nla_put_failure:
2075         wpa_printf(MSG_ERROR, "Failed to remove interface (ifidx=%d).\n",
2076                    ifidx);
2077 }
2078
2079
2080 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
2081                                 const char *ifname, enum nl80211_iftype iftype)
2082 {
2083         struct nl_msg *msg, *flags = NULL;
2084         int ifidx;
2085         int ret = -ENOBUFS;
2086
2087         msg = nlmsg_alloc();
2088         if (!msg)
2089                 return -1;
2090
2091         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2092                     0, NL80211_CMD_NEW_INTERFACE, 0);
2093         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2094         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
2095         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
2096
2097         if (iftype == NL80211_IFTYPE_MONITOR) {
2098                 int err;
2099
2100                 flags = nlmsg_alloc();
2101                 if (!flags)
2102                         goto nla_put_failure;
2103
2104                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
2105
2106                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
2107
2108                 nlmsg_free(flags);
2109
2110                 if (err)
2111                         goto nla_put_failure;
2112         }
2113
2114         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2115         if (ret) {
2116  nla_put_failure:
2117                 wpa_printf(MSG_ERROR, "Failed to create interface %s.",
2118                            ifname);
2119                 return ret;
2120         }
2121
2122         ifidx = if_nametoindex(ifname);
2123
2124         if (ifidx <= 0)
2125                 return -1;
2126
2127         return ifidx;
2128 }
2129
2130
2131 enum ieee80211_msg_type {
2132         ieee80211_msg_normal = 0,
2133         ieee80211_msg_tx_callback_ack = 1,
2134         ieee80211_msg_tx_callback_fail = 2,
2135 };
2136
2137
2138 void ap_tx_status(void *ctx, const u8 *addr,
2139                   const u8 *buf, size_t len, int ack);
2140 void ap_rx_from_unknown_sta(void *ctx, const u8 *addr);
2141 void ap_mgmt_rx(void *ctx, u8 *buf, size_t len, u16 stype,
2142                 struct hostapd_frame_info *fi);
2143 void ap_mgmt_tx_cb(void *ctx, u8 *buf, size_t len, u16 stype, int ok);
2144
2145
2146 static void handle_tx_callback(void *ctx, u8 *buf, size_t len, int ok)
2147 {
2148         struct ieee80211_hdr *hdr;
2149         u16 fc, type, stype;
2150
2151         hdr = (struct ieee80211_hdr *) buf;
2152         fc = le_to_host16(hdr->frame_control);
2153
2154         type = WLAN_FC_GET_TYPE(fc);
2155         stype = WLAN_FC_GET_STYPE(fc);
2156
2157         switch (type) {
2158         case WLAN_FC_TYPE_MGMT:
2159                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
2160                            ok ? "ACK" : "fail");
2161                 ap_mgmt_tx_cb(ctx, buf, len, stype, ok);
2162                 break;
2163         case WLAN_FC_TYPE_CTRL:
2164                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
2165                            ok ? "ACK" : "fail");
2166                 break;
2167         case WLAN_FC_TYPE_DATA:
2168                 ap_tx_status(ctx, hdr->addr1, buf, len, ok);
2169                 break;
2170         default:
2171                 wpa_printf(MSG_DEBUG, "unknown TX callback frame type %d",
2172                            type);
2173                 break;
2174         }
2175 }
2176
2177
2178 static void handle_frame(struct wpa_driver_nl80211_data *drv,
2179                          u8 *buf, size_t len,
2180                          struct hostapd_frame_info *hfi,
2181                          enum ieee80211_msg_type msg_type)
2182 {
2183         struct ieee80211_hdr *hdr;
2184         u16 fc, type, stype;
2185         size_t data_len = len;
2186
2187         /*
2188          * PS-Poll frames are 16 bytes. All other frames are
2189          * 24 bytes or longer.
2190          */
2191         if (len < 16)
2192                 return;
2193
2194         hdr = (struct ieee80211_hdr *) buf;
2195         fc = le_to_host16(hdr->frame_control);
2196
2197         type = WLAN_FC_GET_TYPE(fc);
2198         stype = WLAN_FC_GET_STYPE(fc);
2199
2200         switch (type) {
2201         case WLAN_FC_TYPE_DATA:
2202                 if (len < 24)
2203                         return;
2204                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
2205                 case WLAN_FC_TODS:
2206                         break;
2207                 case WLAN_FC_FROMDS:
2208                         break;
2209                 default:
2210                         /* discard */
2211                         return;
2212                 }
2213                 break;
2214         case WLAN_FC_TYPE_CTRL:
2215                 /* discard non-ps-poll frames */
2216                 if (stype != WLAN_FC_STYPE_PSPOLL)
2217                         return;
2218                 break;
2219         case WLAN_FC_TYPE_MGMT:
2220                 break;
2221         default:
2222                 /* discard */
2223                 return;
2224         }
2225
2226         switch (msg_type) {
2227         case ieee80211_msg_normal:
2228                 /* continue processing */
2229                 break;
2230         case ieee80211_msg_tx_callback_ack:
2231                 handle_tx_callback(drv->ctx, buf, data_len, 1);
2232                 return;
2233         case ieee80211_msg_tx_callback_fail:
2234                 handle_tx_callback(drv->ctx, buf, data_len, 0);
2235                 return;
2236         }
2237
2238         switch (type) {
2239         case WLAN_FC_TYPE_MGMT:
2240                 if (stype != WLAN_FC_STYPE_BEACON &&
2241                     stype != WLAN_FC_STYPE_PROBE_REQ)
2242                         wpa_printf(MSG_MSGDUMP, "MGMT");
2243                 ap_mgmt_rx(drv->ctx, buf, data_len, stype, hfi);
2244                 break;
2245         case WLAN_FC_TYPE_CTRL:
2246                 /* can only get here with PS-Poll frames */
2247                 wpa_printf(MSG_DEBUG, "CTRL");
2248                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2249                 break;
2250         case WLAN_FC_TYPE_DATA:
2251                 ap_rx_from_unknown_sta(drv->ctx, hdr->addr2);
2252                 break;
2253         }
2254 }
2255
2256
2257 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
2258 {
2259         struct wpa_driver_nl80211_data *drv = eloop_ctx;
2260         int len;
2261         unsigned char buf[3000];
2262         struct ieee80211_radiotap_iterator iter;
2263         int ret;
2264         struct hostapd_frame_info hfi;
2265         int injected = 0, failed = 0, msg_type, rxflags = 0;
2266
2267         len = recv(sock, buf, sizeof(buf), 0);
2268         if (len < 0) {
2269                 perror("recv");
2270                 return;
2271         }
2272
2273         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
2274                 printf("received invalid radiotap frame\n");
2275                 return;
2276         }
2277
2278         memset(&hfi, 0, sizeof(hfi));
2279
2280         while (1) {
2281                 ret = ieee80211_radiotap_iterator_next(&iter);
2282                 if (ret == -ENOENT)
2283                         break;
2284                 if (ret) {
2285                         printf("received invalid radiotap frame (%d)\n", ret);
2286                         return;
2287                 }
2288                 switch (iter.this_arg_index) {
2289                 case IEEE80211_RADIOTAP_FLAGS:
2290                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
2291                                 len -= 4;
2292                         break;
2293                 case IEEE80211_RADIOTAP_RX_FLAGS:
2294                         rxflags = 1;
2295                         break;
2296                 case IEEE80211_RADIOTAP_TX_FLAGS:
2297                         injected = 1;
2298                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
2299                                         IEEE80211_RADIOTAP_F_TX_FAIL;
2300                         break;
2301                 case IEEE80211_RADIOTAP_DATA_RETRIES:
2302                         break;
2303                 case IEEE80211_RADIOTAP_CHANNEL:
2304                         /* TODO convert from freq/flags to channel number
2305                         hfi.channel = XXX;
2306                         hfi.phytype = XXX;
2307                          */
2308                         break;
2309                 case IEEE80211_RADIOTAP_RATE:
2310                         hfi.datarate = *iter.this_arg * 5;
2311                         break;
2312                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
2313                         hfi.ssi_signal = *iter.this_arg;
2314                         break;
2315                 }
2316         }
2317
2318         if (rxflags && injected)
2319                 return;
2320
2321         if (!injected)
2322                 msg_type = ieee80211_msg_normal;
2323         else if (failed)
2324                 msg_type = ieee80211_msg_tx_callback_fail;
2325         else
2326                 msg_type = ieee80211_msg_tx_callback_ack;
2327
2328         handle_frame(drv, buf + iter.max_length,
2329                      len - iter.max_length, &hfi, msg_type);
2330 }
2331
2332
2333 /*
2334  * we post-process the filter code later and rewrite
2335  * this to the offset to the last instruction
2336  */
2337 #define PASS    0xFF
2338 #define FAIL    0xFE
2339
2340 static struct sock_filter msock_filter_insns[] = {
2341         /*
2342          * do a little-endian load of the radiotap length field
2343          */
2344         /* load lower byte into A */
2345         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
2346         /* put it into X (== index register) */
2347         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2348         /* load upper byte into A */
2349         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
2350         /* left-shift it by 8 */
2351         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
2352         /* or with X */
2353         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
2354         /* put result into X */
2355         BPF_STMT(BPF_MISC| BPF_TAX, 0),
2356
2357         /*
2358          * Allow management frames through, this also gives us those
2359          * management frames that we sent ourselves with status
2360          */
2361         /* load the lower byte of the IEEE 802.11 frame control field */
2362         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
2363         /* mask off frame type and version */
2364         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
2365         /* accept frame if it's both 0, fall through otherwise */
2366         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
2367
2368         /*
2369          * TODO: add a bit to radiotap RX flags that indicates
2370          * that the sending station is not associated, then
2371          * add a filter here that filters on our DA and that flag
2372          * to allow us to deauth frames to that bad station.
2373          *
2374          * Not a regression -- we didn't do it before either.
2375          */
2376
2377 #if 0
2378         /*
2379          * drop non-data frames, WDS frames
2380          */
2381         /* load the lower byte of the frame control field */
2382         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2383         /* mask off QoS bit */
2384         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
2385         /* drop non-data frames */
2386         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
2387         /* load the upper byte of the frame control field */
2388         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2389         /* mask off toDS/fromDS */
2390         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
2391         /* drop WDS frames */
2392         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
2393 #endif
2394
2395         /*
2396          * add header length to index
2397          */
2398         /* load the lower byte of the frame control field */
2399         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
2400         /* mask off QoS bit */
2401         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
2402         /* right shift it by 6 to give 0 or 2 */
2403         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
2404         /* add data frame header length */
2405         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
2406         /* add index, was start of 802.11 header */
2407         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
2408         /* move to index, now start of LL header */
2409         BPF_STMT(BPF_MISC | BPF_TAX, 0),
2410
2411         /*
2412          * Accept empty data frames, we use those for
2413          * polling activity.
2414          */
2415         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
2416         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
2417
2418         /*
2419          * Accept EAPOL frames
2420          */
2421         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
2422         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
2423         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
2424         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
2425
2426         /* keep these last two statements or change the code below */
2427         /* return 0 == "DROP" */
2428         BPF_STMT(BPF_RET | BPF_K, 0),
2429         /* return ~0 == "keep all" */
2430         BPF_STMT(BPF_RET | BPF_K, ~0),
2431 };
2432
2433 static struct sock_fprog msock_filter = {
2434         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
2435         .filter = msock_filter_insns,
2436 };
2437
2438
2439 static int add_monitor_filter(int s)
2440 {
2441         int idx;
2442
2443         /* rewrite all PASS/FAIL jump offsets */
2444         for (idx = 0; idx < msock_filter.len; idx++) {
2445                 struct sock_filter *insn = &msock_filter_insns[idx];
2446
2447                 if (BPF_CLASS(insn->code) == BPF_JMP) {
2448                         if (insn->code == (BPF_JMP|BPF_JA)) {
2449                                 if (insn->k == PASS)
2450                                         insn->k = msock_filter.len - idx - 2;
2451                                 else if (insn->k == FAIL)
2452                                         insn->k = msock_filter.len - idx - 3;
2453                         }
2454
2455                         if (insn->jt == PASS)
2456                                 insn->jt = msock_filter.len - idx - 2;
2457                         else if (insn->jt == FAIL)
2458                                 insn->jt = msock_filter.len - idx - 3;
2459
2460                         if (insn->jf == PASS)
2461                                 insn->jf = msock_filter.len - idx - 2;
2462                         else if (insn->jf == FAIL)
2463                                 insn->jf = msock_filter.len - idx - 3;
2464                 }
2465         }
2466
2467         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
2468                        &msock_filter, sizeof(msock_filter))) {
2469                 perror("SO_ATTACH_FILTER");
2470                 return -1;
2471         }
2472
2473         return 0;
2474 }
2475
2476
2477 static int
2478 nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
2479 {
2480         char buf[IFNAMSIZ];
2481         struct sockaddr_ll ll;
2482         int optval;
2483         socklen_t optlen;
2484         int flags;
2485
2486         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
2487         buf[IFNAMSIZ - 1] = '\0';
2488
2489         drv->monitor_ifidx =
2490                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR);
2491
2492         if (drv->monitor_ifidx < 0)
2493                 return -1;
2494
2495         if (wpa_driver_nl80211_get_ifflags_ifname(drv, buf, &flags) != 0) {
2496                 wpa_printf(MSG_ERROR, "Could not get interface '%s' flags",
2497                            buf);
2498                 goto error;
2499         }
2500         if (!(flags & IFF_UP)) {
2501                 if (wpa_driver_nl80211_set_ifflags_ifname(drv, buf,
2502                                                           flags | IFF_UP) != 0)
2503                 {
2504                         wpa_printf(MSG_ERROR, "Could not set interface '%s' "
2505                                    "UP", buf);
2506                         goto error;
2507                 }
2508         }
2509
2510         memset(&ll, 0, sizeof(ll));
2511         ll.sll_family = AF_PACKET;
2512         ll.sll_ifindex = drv->monitor_ifidx;
2513         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
2514         if (drv->monitor_sock < 0) {
2515                 perror("socket[PF_PACKET,SOCK_RAW]");
2516                 goto error;
2517         }
2518
2519         if (add_monitor_filter(drv->monitor_sock)) {
2520                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
2521                            "interface; do filtering in user space");
2522                 /* This works, but will cost in performance. */
2523         }
2524
2525         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
2526                  sizeof(ll)) < 0) {
2527                 perror("monitor socket bind");
2528                 goto error;
2529         }
2530
2531         optlen = sizeof(optval);
2532         optval = 20;
2533         if (setsockopt
2534             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
2535                 perror("Failed to set socket priority");
2536                 goto error;
2537         }
2538
2539         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
2540                                      drv, NULL)) {
2541                 printf("Could not register monitor read socket\n");
2542                 goto error;
2543         }
2544
2545         return 0;
2546  error:
2547         nl80211_remove_iface(drv, drv->monitor_ifidx);
2548         return -1;
2549 }
2550
2551
2552 static int wpa_driver_nl80211_ap(struct wpa_driver_nl80211_data *drv,
2553                                  struct wpa_driver_associate_params *params)
2554 {
2555         if (drv->monitor_ifidx < 0 &&
2556             nl80211_create_monitor_interface(drv))
2557                 return -1;
2558
2559         if (wpa_driver_nl80211_set_mode(drv, params->mode) ||
2560             wpa_driver_nl80211_set_freq2(drv, params)) {
2561                 nl80211_remove_iface(drv, drv->monitor_ifidx);
2562                 drv->monitor_ifidx = -1;
2563                 return -1;
2564         }
2565
2566         /* TODO: setup monitor interface (and add code somewhere to remove this
2567          * when AP mode is stopped; associate with mode != 2 or drv_deinit) */
2568
2569         return 0;
2570 }
2571 #endif /* CONFIG_AP */
2572
2573
2574 static int wpa_driver_nl80211_associate(
2575         void *priv, struct wpa_driver_associate_params *params)
2576 {
2577         struct wpa_driver_nl80211_data *drv = priv;
2578         int ret = -1;
2579         struct nl_msg *msg;
2580
2581 #ifdef CONFIG_AP
2582         if (params->mode == 2)
2583                 return wpa_driver_nl80211_ap(drv, params);
2584 #endif /* CONFIG_AP */
2585
2586         wpa_driver_nl80211_set_auth_param(drv, IW_AUTH_DROP_UNENCRYPTED,
2587                                           params->drop_unencrypted);
2588
2589         drv->associated = 0;
2590
2591         msg = nlmsg_alloc();
2592         if (!msg)
2593                 return -1;
2594
2595         wpa_printf(MSG_DEBUG, "nl80211: Associate (ifindex=%d)",
2596                    drv->ifindex);
2597         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
2598                     NL80211_CMD_ASSOCIATE, 0);
2599
2600         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2601         if (params->bssid) {
2602                 wpa_printf(MSG_DEBUG, "  * bssid=" MACSTR,
2603                            MAC2STR(params->bssid));
2604                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->bssid);
2605         }
2606         if (params->freq) {
2607                 wpa_printf(MSG_DEBUG, "  * freq=%d", params->freq);
2608                 NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, params->freq);
2609         }
2610         if (params->ssid) {
2611                 wpa_hexdump_ascii(MSG_DEBUG, "  * SSID",
2612                                   params->ssid, params->ssid_len);
2613                 NLA_PUT(msg, NL80211_ATTR_SSID, params->ssid_len,
2614                         params->ssid);
2615                 if (params->ssid_len > sizeof(drv->ssid))
2616                         goto nla_put_failure;
2617                 os_memcpy(drv->ssid, params->ssid, params->ssid_len);
2618                 drv->ssid_len = params->ssid_len;
2619         }
2620         wpa_hexdump(MSG_DEBUG, "  * IEs", params->wpa_ie, params->wpa_ie_len);
2621         if (params->wpa_ie)
2622                 NLA_PUT(msg, NL80211_ATTR_IE, params->wpa_ie_len,
2623                         params->wpa_ie);
2624
2625         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2626         msg = NULL;
2627         if (ret) {
2628                 wpa_printf(MSG_DEBUG, "nl80211: MLME command failed: ret=%d "
2629                            "(%s)", ret, strerror(-ret));
2630                 goto nla_put_failure;
2631         }
2632         ret = 0;
2633         wpa_printf(MSG_DEBUG, "nl80211: Association request send "
2634                    "successfully");
2635
2636 nla_put_failure:
2637         nlmsg_free(msg);
2638         return ret;
2639 }
2640
2641
2642 /**
2643  * wpa_driver_nl80211_set_mode - Set wireless mode (infra/adhoc)
2644  * @drv: Pointer to private driver data from wpa_driver_nl80211_init()
2645  * @mode: 0 = infra/BSS (associate with an AP), 1 = adhoc/IBSS
2646  * Returns: 0 on success, -1 on failure
2647  */
2648 static int wpa_driver_nl80211_set_mode(struct wpa_driver_nl80211_data *drv,
2649                                        int mode)
2650 {
2651         int ret = -1, flags;
2652         struct nl_msg *msg;
2653         int nlmode;
2654
2655         switch (mode) {
2656         case 0:
2657                 nlmode = NL80211_IFTYPE_STATION;
2658                 break;
2659         case 1:
2660                 nlmode = NL80211_IFTYPE_ADHOC;
2661                 break;
2662         case 2:
2663                 nlmode = NL80211_IFTYPE_AP;
2664                 break;
2665         default:
2666                 return -1;
2667         }
2668
2669         msg = nlmsg_alloc();
2670         if (!msg)
2671                 return -1;
2672
2673         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2674                     0, NL80211_CMD_SET_INTERFACE, 0);
2675         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2676         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2677
2678         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2679         if (!ret)
2680                 return 0;
2681         else
2682                 goto try_again;
2683
2684 nla_put_failure:
2685         wpa_printf(MSG_ERROR, "nl80211: Failed to set interface mode: %d (%s)",
2686                    ret, strerror(-ret));
2687         return -1;
2688
2689 try_again:
2690         /* mac80211 doesn't allow mode changes while the device is up, so
2691          * take the device down, try to set the mode again, and bring the
2692          * device back up.
2693          */
2694         if (wpa_driver_nl80211_get_ifflags(drv, &flags) == 0) {
2695                 (void) wpa_driver_nl80211_set_ifflags(drv, flags & ~IFF_UP);
2696
2697                 /* Try to set the mode again while the interface is down */
2698                 msg = nlmsg_alloc();
2699                 if (!msg)
2700                         return -1;
2701
2702                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2703                             0, NL80211_CMD_SET_INTERFACE, 0);
2704                 NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, drv->ifindex);
2705                 NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, nlmode);
2706                 ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2707                 if (ret) {
2708                         wpa_printf(MSG_ERROR, "Failed to set interface %s "
2709                                    "mode(try_again): %d (%s)",
2710                                    drv->ifname, ret, strerror(-ret));
2711                 }
2712
2713                 /* Ignore return value of get_ifflags to ensure that the device
2714                  * is always up like it was before this function was called.
2715                  */
2716                 (void) wpa_driver_nl80211_get_ifflags(drv, &flags);
2717                 (void) wpa_driver_nl80211_set_ifflags(drv, flags | IFF_UP);
2718         }
2719
2720         return ret;
2721 }
2722
2723
2724 static int wpa_driver_nl80211_get_capa(void *priv,
2725                                        struct wpa_driver_capa *capa)
2726 {
2727         struct wpa_driver_nl80211_data *drv = priv;
2728         if (!drv->has_capability)
2729                 return -1;
2730         os_memcpy(capa, &drv->capa, sizeof(*capa));
2731         return 0;
2732 }
2733
2734
2735 static int wpa_driver_nl80211_set_operstate(void *priv, int state)
2736 {
2737         struct wpa_driver_nl80211_data *drv = priv;
2738
2739         wpa_printf(MSG_DEBUG, "%s: operstate %d->%d (%s)",
2740                    __func__, drv->operstate, state, state ? "UP" : "DORMANT");
2741         drv->operstate = state;
2742         return wpa_driver_nl80211_send_oper_ifla(
2743                 drv, -1, state ? IF_OPER_UP : IF_OPER_DORMANT);
2744 }
2745
2746
2747 #ifdef HOSTAPD
2748
2749 static const u8 rfc1042_header[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
2750
2751 enum ieee80211_msg_type {
2752         ieee80211_msg_normal = 0,
2753         ieee80211_msg_tx_callback_ack = 1,
2754         ieee80211_msg_tx_callback_fail = 2,
2755 };
2756
2757
2758 static int i802_sta_deauth(void *priv, const u8 *addr, int reason);
2759 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason);
2760
2761
2762 static struct i802_bss * get_bss(struct wpa_driver_nl80211_data *drv,
2763                                  const char *iface)
2764 {
2765         struct i802_bss *bss = &drv->bss;
2766         while (bss) {
2767                 if (os_strncmp(iface, bss->ifname, IFNAMSIZ) == 0)
2768                         return bss;
2769                 bss = bss->next;
2770         }
2771         wpa_printf(MSG_DEBUG, "nl80211: get_bss(%s) failed", iface);
2772         return NULL;
2773 }
2774
2775
2776 static void add_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2777 {
2778         int i;
2779         int *old;
2780
2781         wpa_printf(MSG_DEBUG, "nl80211: Add own interface ifindex %d",
2782                    ifidx);
2783         for (i = 0; i < drv->num_if_indices; i++) {
2784                 if (drv->if_indices[i] == 0) {
2785                         drv->if_indices[i] = ifidx;
2786                         return;
2787                 }
2788         }
2789
2790         if (drv->if_indices != drv->default_if_indices)
2791                 old = drv->if_indices;
2792         else
2793                 old = NULL;
2794
2795         drv->if_indices = realloc(old,
2796                                   sizeof(int) * (drv->num_if_indices + 1));
2797         if (!drv->if_indices) {
2798                 if (!old)
2799                         drv->if_indices = drv->default_if_indices;
2800                 else
2801                         drv->if_indices = old;
2802                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
2803                            "interfaces");
2804                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
2805                 return;
2806         }
2807         drv->if_indices[drv->num_if_indices] = ifidx;
2808         drv->num_if_indices++;
2809 }
2810
2811
2812 static void del_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2813 {
2814         int i;
2815
2816         for (i = 0; i < drv->num_if_indices; i++) {
2817                 if (drv->if_indices[i] == ifidx) {
2818                         drv->if_indices[i] = 0;
2819                         break;
2820                 }
2821         }
2822 }
2823
2824
2825 static int have_ifidx(struct wpa_driver_nl80211_data *drv, int ifidx)
2826 {
2827         int i;
2828
2829         for (i = 0; i < drv->num_if_indices; i++)
2830                 if (drv->if_indices[i] == ifidx)
2831                         return 1;
2832
2833         return 0;
2834 }
2835
2836
2837 static int hostapd_set_iface_flags(struct wpa_driver_nl80211_data *drv,
2838                                    const char *ifname, int dev_up)
2839 {
2840         struct ifreq ifr;
2841
2842         if (drv->ioctl_sock < 0)
2843                 return -1;
2844
2845         memset(&ifr, 0, sizeof(ifr));
2846         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
2847
2848         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
2849                 perror("ioctl[SIOCGIFFLAGS]");
2850                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
2851                            drv->ifname);
2852                 return -1;
2853         }
2854
2855         if (dev_up)
2856                 ifr.ifr_flags |= IFF_UP;
2857         else
2858                 ifr.ifr_flags &= ~IFF_UP;
2859
2860         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
2861                 perror("ioctl[SIOCSIFFLAGS]");
2862                 return -1;
2863         }
2864
2865         return 0;
2866 }
2867
2868
2869 static int nl_set_encr(int ifindex, struct wpa_driver_nl80211_data *drv,
2870                        wpa_alg alg, const u8 *addr, int idx, const u8 *key,
2871                        size_t key_len, int txkey)
2872 {
2873         struct nl_msg *msg;
2874         int ret;
2875
2876         msg = nlmsg_alloc();
2877         if (!msg)
2878                 return -ENOMEM;
2879
2880         if (alg == WPA_ALG_NONE) {
2881                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2882                             0, NL80211_CMD_DEL_KEY, 0);
2883         } else {
2884                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2885                             0, NL80211_CMD_NEW_KEY, 0);
2886                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
2887                 switch (alg) {
2888                 case WPA_ALG_WEP:
2889                         if (key_len == 5)
2890                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2891                                             0x000FAC01);
2892                         else
2893                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
2894                                             0x000FAC05);
2895                         break;
2896                 case WPA_ALG_TKIP:
2897                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
2898                         break;
2899                 case WPA_ALG_CCMP:
2900                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
2901                         break;
2902                 case WPA_ALG_IGTK:
2903                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
2904                         break;
2905                 default:
2906                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
2907                                    "algorithm %d", __func__, alg);
2908                         nlmsg_free(msg);
2909                         return -1;
2910                 }
2911         }
2912
2913         if (addr)
2914                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
2915         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
2916         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2917
2918         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2919         if (ret == -ENOENT)
2920                 ret = 0;
2921
2922         /*
2923          * If we failed or don't need to set the default TX key (below),
2924          * we're done here.
2925          */
2926         if (ret || !txkey || addr)
2927                 return ret;
2928
2929         msg = nlmsg_alloc();
2930         if (!msg)
2931                 return -ENOMEM;
2932
2933         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
2934                     0, NL80211_CMD_SET_KEY, 0);
2935         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
2936         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
2937         if (alg == WPA_ALG_IGTK)
2938                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
2939         else
2940                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
2941
2942         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
2943         if (ret == -ENOENT)
2944                 ret = 0;
2945         return ret;
2946  nla_put_failure:
2947         return -ENOBUFS;
2948 }
2949
2950
2951 static int i802_set_key(const char *iface, void *priv, wpa_alg alg,
2952                         const u8 *addr, int key_idx, int set_tx, const u8 *seq,
2953                         size_t seq_len, const u8 *key, size_t key_len)
2954 {
2955         struct wpa_driver_nl80211_data *drv = priv;
2956         int ret;
2957
2958         ret = nl_set_encr(if_nametoindex(iface), drv, alg, addr, key_idx, key,
2959                           key_len, set_tx);
2960         if (ret < 0)
2961                 return ret;
2962
2963         return ret;
2964 }
2965
2966
2967 static inline int min_int(int a, int b)
2968 {
2969         if (a < b)
2970                 return a;
2971         return b;
2972 }
2973
2974
2975 static int get_key_handler(struct nl_msg *msg, void *arg)
2976 {
2977         struct nlattr *tb[NL80211_ATTR_MAX + 1];
2978         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
2979
2980         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
2981                   genlmsg_attrlen(gnlh, 0), NULL);
2982
2983         /*
2984          * TODO: validate the key index and mac address!
2985          * Otherwise, there's a race condition as soon as
2986          * the kernel starts sending key notifications.
2987          */
2988
2989         if (tb[NL80211_ATTR_KEY_SEQ])
2990                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
2991                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
2992         return NL_SKIP;
2993 }
2994
2995
2996 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
2997                            int idx, u8 *seq)
2998 {
2999         struct wpa_driver_nl80211_data *drv = priv;
3000         struct nl_msg *msg;
3001
3002         msg = nlmsg_alloc();
3003         if (!msg)
3004                 return -ENOMEM;
3005
3006         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3007                     0, NL80211_CMD_GET_KEY, 0);
3008
3009         if (addr)
3010                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3011         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
3012         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3013
3014         memset(seq, 0, 6);
3015
3016         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
3017  nla_put_failure:
3018         return -ENOBUFS;
3019 }
3020
3021
3022 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
3023                               int mode)
3024 {
3025         struct wpa_driver_nl80211_data *drv = priv;
3026         struct nl_msg *msg;
3027         u8 rates[NL80211_MAX_SUPP_RATES];
3028         u8 rates_len = 0;
3029         int i;
3030
3031         msg = nlmsg_alloc();
3032         if (!msg)
3033                 return -ENOMEM;
3034
3035         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3036                     NL80211_CMD_SET_BSS, 0);
3037
3038         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
3039                 rates[rates_len++] = basic_rates[i] / 5;
3040
3041         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
3042
3043         /* TODO: multi-BSS support */
3044         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3045
3046         return send_and_recv_msgs(drv, msg, NULL, NULL);
3047  nla_put_failure:
3048         return -ENOBUFS;
3049 }
3050
3051
3052 static int i802_send_frame(void *priv, const void *data, size_t len,
3053                            int encrypt, int flags)
3054 {
3055         __u8 rtap_hdr[] = {
3056                 0x00, 0x00, /* radiotap version */
3057                 0x0e, 0x00, /* radiotap length */
3058                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
3059                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
3060                 0x00,       /* padding */
3061                 0x00, 0x00, /* RX and TX flags to indicate that */
3062                 0x00, 0x00, /* this is the injected frame directly */
3063         };
3064         struct wpa_driver_nl80211_data *drv = priv;
3065         struct iovec iov[2] = {
3066                 {
3067                         .iov_base = &rtap_hdr,
3068                         .iov_len = sizeof(rtap_hdr),
3069                 },
3070                 {
3071                         .iov_base = (void*)data,
3072                         .iov_len = len,
3073                 }
3074         };
3075         struct msghdr msg = {
3076                 .msg_name = NULL,
3077                 .msg_namelen = 0,
3078                 .msg_iov = iov,
3079                 .msg_iovlen = 2,
3080                 .msg_control = NULL,
3081                 .msg_controllen = 0,
3082                 .msg_flags = 0,
3083         };
3084
3085         if (encrypt)
3086                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
3087
3088         return sendmsg(drv->monitor_sock, &msg, flags);
3089 }
3090
3091 static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
3092                                 int flags)
3093 {
3094         struct ieee80211_mgmt *mgmt;
3095         int do_not_encrypt = 0;
3096         u16 fc;
3097
3098         mgmt = (struct ieee80211_mgmt *) data;
3099         fc = le_to_host16(mgmt->frame_control);
3100
3101         if (WLAN_FC_GET_TYPE(fc) == WLAN_FC_TYPE_MGMT &&
3102             WLAN_FC_GET_STYPE(fc) == WLAN_FC_STYPE_AUTH) {
3103                 /*
3104                  * Only one of the authentication frame types is encrypted.
3105                  * In order for static WEP encryption to work properly (i.e.,
3106                  * to not encrypt the frame), we need to tell mac80211 about
3107                  * the frames that must not be encrypted.
3108                  */
3109                 u16 auth_alg = le_to_host16(mgmt->u.auth.auth_alg);
3110                 u16 auth_trans = le_to_host16(mgmt->u.auth.auth_transaction);
3111                 if (auth_alg == WLAN_AUTH_OPEN ||
3112                     (auth_alg == WLAN_AUTH_SHARED_KEY && auth_trans != 3))
3113                         do_not_encrypt = 1;
3114         }
3115
3116         return i802_send_frame(priv, data, len, !do_not_encrypt, flags);
3117 }
3118
3119 /* Set kernel driver on given frequency (MHz) */
3120 static int i802_set_freq(void *priv, struct hostapd_freq_params *freq)
3121 {
3122         struct wpa_driver_nl80211_data *drv = priv;
3123         struct nl_msg *msg;
3124
3125         msg = nlmsg_alloc();
3126         if (!msg)
3127                 return -1;
3128
3129         drv->last_freq = freq->freq;
3130         drv->last_freq_ht = freq->ht_enabled;
3131
3132         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3133                     NL80211_CMD_SET_WIPHY, 0);
3134
3135         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3136         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq);
3137         if (freq->ht_enabled) {
3138                 switch (freq->sec_channel_offset) {
3139                 case -1:
3140                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3141                                     NL80211_CHAN_HT40MINUS);
3142                         break;
3143                 case 1:
3144                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3145                                     NL80211_CHAN_HT40PLUS);
3146                         break;
3147                 default:
3148                         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_CHANNEL_TYPE,
3149                                     NL80211_CHAN_HT20);
3150                         break;
3151                 }
3152         }
3153
3154         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3155                 return 0;
3156  nla_put_failure:
3157         return -1;
3158 }
3159
3160
3161 static int i802_set_rts(void *priv, int rts)
3162 {
3163         struct wpa_driver_nl80211_data *drv = priv;
3164         struct iwreq iwr;
3165
3166         memset(&iwr, 0, sizeof(iwr));
3167         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3168         iwr.u.rts.value = rts;
3169         iwr.u.rts.fixed = 1;
3170
3171         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
3172                 perror("ioctl[SIOCSIWRTS]");
3173                 return -1;
3174         }
3175
3176         return 0;
3177 }
3178
3179
3180 static int i802_set_frag(void *priv, int frag)
3181 {
3182         struct wpa_driver_nl80211_data *drv = priv;
3183         struct iwreq iwr;
3184
3185         memset(&iwr, 0, sizeof(iwr));
3186         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3187         iwr.u.frag.value = frag;
3188         iwr.u.frag.fixed = 1;
3189
3190         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
3191                 perror("ioctl[SIOCSIWFRAG]");
3192                 return -1;
3193         }
3194
3195         return 0;
3196 }
3197
3198
3199 static int i802_set_retry(void *priv, int short_retry, int long_retry)
3200 {
3201         struct wpa_driver_nl80211_data *drv = priv;
3202         struct iwreq iwr;
3203
3204         memset(&iwr, 0, sizeof(iwr));
3205         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
3206
3207         iwr.u.retry.value = short_retry;
3208         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
3209         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3210                 perror("ioctl[SIOCSIWRETRY(short)]");
3211                 return -1;
3212         }
3213
3214         iwr.u.retry.value = long_retry;
3215         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
3216         if (ioctl(drv->ioctl_sock, SIOCSIWRETRY, &iwr) < 0) {
3217                 perror("ioctl[SIOCSIWRETRY(long)]");
3218                 return -1;
3219         }
3220
3221         return 0;
3222 }
3223
3224
3225 static int i802_flush(void *priv)
3226 {
3227         struct wpa_driver_nl80211_data *drv = priv;
3228         struct nl_msg *msg;
3229
3230         msg = nlmsg_alloc();
3231         if (!msg)
3232                 return -1;
3233
3234         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3235                     0, NL80211_CMD_DEL_STATION, 0);
3236
3237         /*
3238          * XXX: FIX! this needs to flush all VLANs too
3239          */
3240         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3241                     if_nametoindex(drv->ifname));
3242
3243         return send_and_recv_msgs(drv, msg, NULL, NULL);
3244  nla_put_failure:
3245         return -ENOBUFS;
3246 }
3247
3248
3249 static int get_sta_handler(struct nl_msg *msg, void *arg)
3250 {
3251         struct nlattr *tb[NL80211_ATTR_MAX + 1];
3252         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3253         struct hostap_sta_driver_data *data = arg;
3254         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
3255         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
3256                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
3257                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
3258                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
3259                 [NL80211_STA_INFO_RX_PACKETS] = { .type = NLA_U32 },
3260                 [NL80211_STA_INFO_TX_PACKETS] = { .type = NLA_U32 },
3261         };
3262
3263         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3264                   genlmsg_attrlen(gnlh, 0), NULL);
3265
3266         /*
3267          * TODO: validate the interface and mac address!
3268          * Otherwise, there's a race condition as soon as
3269          * the kernel starts sending station notifications.
3270          */
3271
3272         if (!tb[NL80211_ATTR_STA_INFO]) {
3273                 wpa_printf(MSG_DEBUG, "sta stats missing!");
3274                 return NL_SKIP;
3275         }
3276         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
3277                              tb[NL80211_ATTR_STA_INFO],
3278                              stats_policy)) {
3279                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
3280                 return NL_SKIP;
3281         }
3282
3283         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
3284                 data->inactive_msec =
3285                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
3286         if (stats[NL80211_STA_INFO_RX_BYTES])
3287                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
3288         if (stats[NL80211_STA_INFO_TX_BYTES])
3289                 data->tx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
3290         if (stats[NL80211_STA_INFO_RX_PACKETS])
3291                 data->rx_packets =
3292                         nla_get_u32(stats[NL80211_STA_INFO_RX_PACKETS]);
3293         if (stats[NL80211_STA_INFO_TX_PACKETS])
3294                 data->tx_packets =
3295                         nla_get_u32(stats[NL80211_STA_INFO_TX_PACKETS]);
3296
3297         return NL_SKIP;
3298 }
3299
3300 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
3301                               const u8 *addr)
3302 {
3303         struct wpa_driver_nl80211_data *drv = priv;
3304         struct nl_msg *msg;
3305
3306         os_memset(data, 0, sizeof(*data));
3307         msg = nlmsg_alloc();
3308         if (!msg)
3309                 return -ENOMEM;
3310
3311         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3312                     0, NL80211_CMD_GET_STATION, 0);
3313
3314         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3315         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3316
3317         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
3318  nla_put_failure:
3319         return -ENOBUFS;
3320 }
3321
3322
3323 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
3324                            size_t data_len, int encrypt, const u8 *own_addr)
3325 {
3326         struct wpa_driver_nl80211_data *drv = priv;
3327         struct ieee80211_hdr *hdr;
3328         size_t len;
3329         u8 *pos;
3330         int res;
3331 #if 0 /* FIX */
3332         int qos = sta->flags & WLAN_STA_WME;
3333 #else
3334         int qos = 0;
3335 #endif
3336
3337         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
3338                 data_len;
3339         hdr = os_zalloc(len);
3340         if (hdr == NULL) {
3341                 printf("malloc() failed for i802_send_data(len=%lu)\n",
3342                        (unsigned long) len);
3343                 return -1;
3344         }
3345
3346         hdr->frame_control =
3347                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
3348         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
3349         if (encrypt)
3350                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
3351 #if 0 /* To be enabled if qos determination is added above */
3352         if (qos) {
3353                 hdr->frame_control |=
3354                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
3355         }
3356 #endif
3357
3358         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
3359         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
3360         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
3361         pos = (u8 *) (hdr + 1);
3362
3363 #if 0 /* To be enabled if qos determination is added above */
3364         if (qos) {
3365                 /* add an empty QoS header if needed */
3366                 pos[0] = 0;
3367                 pos[1] = 0;
3368                 pos += 2;
3369         }
3370 #endif
3371
3372         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
3373         pos += sizeof(rfc1042_header);
3374         WPA_PUT_BE16(pos, ETH_P_PAE);
3375         pos += 2;
3376         memcpy(pos, data, data_len);
3377
3378         res = i802_send_frame(drv, (u8 *) hdr, len, encrypt, 0);
3379         free(hdr);
3380
3381         if (res < 0) {
3382                 perror("i802_send_eapol: send");
3383                 printf("i802_send_eapol - packet len: %lu - failed\n",
3384                        (unsigned long) len);
3385         }
3386
3387         return res;
3388 }
3389
3390
3391 static int i802_sta_add(const char *ifname, void *priv,
3392                         struct hostapd_sta_add_params *params)
3393 {
3394         struct wpa_driver_nl80211_data *drv = priv;
3395         struct nl_msg *msg;
3396         int ret = -ENOBUFS;
3397
3398         msg = nlmsg_alloc();
3399         if (!msg)
3400                 return -ENOMEM;
3401
3402         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3403                     0, NL80211_CMD_NEW_STATION, 0);
3404
3405         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3406                     if_nametoindex(drv->ifname));
3407         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
3408         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
3409         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
3410                 params->supp_rates);
3411         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
3412                     params->listen_interval);
3413
3414 #ifdef CONFIG_IEEE80211N
3415         if (params->ht_capabilities) {
3416                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
3417                         params->ht_capabilities->length,
3418                         &params->ht_capabilities->data);
3419         }
3420 #endif /* CONFIG_IEEE80211N */
3421
3422         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3423         if (ret)
3424                 wpa_printf(MSG_DEBUG, "nl80211: NL80211_CMD_NEW_STATION "
3425                            "result: %d (%s)", ret, strerror(-ret));
3426         if (ret == -EEXIST)
3427                 ret = 0;
3428  nla_put_failure:
3429         return ret;
3430 }
3431
3432
3433 static int i802_sta_remove(void *priv, const u8 *addr)
3434 {
3435         struct wpa_driver_nl80211_data *drv = priv;
3436         struct nl_msg *msg;
3437         int ret;
3438
3439         msg = nlmsg_alloc();
3440         if (!msg)
3441                 return -ENOMEM;
3442
3443         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3444                     0, NL80211_CMD_DEL_STATION, 0);
3445
3446         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3447                     if_nametoindex(drv->ifname));
3448         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3449
3450         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3451         if (ret == -ENOENT)
3452                 return 0;
3453         return ret;
3454  nla_put_failure:
3455         return -ENOBUFS;
3456 }
3457
3458
3459 static int i802_sta_set_flags(void *priv, const u8 *addr,
3460                               int total_flags, int flags_or, int flags_and)
3461 {
3462         struct wpa_driver_nl80211_data *drv = priv;
3463         struct nl_msg *msg, *flags = NULL;
3464
3465         msg = nlmsg_alloc();
3466         if (!msg)
3467                 return -ENOMEM;
3468
3469         flags = nlmsg_alloc();
3470         if (!flags) {
3471                 nlmsg_free(msg);
3472                 return -ENOMEM;
3473         }
3474
3475         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3476                     0, NL80211_CMD_SET_STATION, 0);
3477
3478         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
3479                     if_nametoindex(drv->ifname));
3480         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
3481
3482         if (total_flags & WLAN_STA_AUTHORIZED)
3483                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
3484
3485         if (total_flags & WLAN_STA_WMM)
3486                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
3487
3488         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
3489                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
3490
3491         if (total_flags & WLAN_STA_MFP)
3492                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
3493
3494         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
3495                 goto nla_put_failure;
3496
3497         nlmsg_free(flags);
3498
3499         return send_and_recv_msgs(drv, msg, NULL, NULL);
3500  nla_put_failure:
3501         nlmsg_free(flags);
3502         return -ENOBUFS;
3503 }
3504
3505
3506 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
3507                                     int cw_min, int cw_max, int burst_time)
3508 {
3509         struct wpa_driver_nl80211_data *drv = priv;
3510         struct nl_msg *msg;
3511         struct nlattr *txq, *params;
3512
3513         msg = nlmsg_alloc();
3514         if (!msg)
3515                 return -1;
3516
3517         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3518                     0, NL80211_CMD_SET_WIPHY, 0);
3519
3520         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3521
3522         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
3523         if (!txq)
3524                 goto nla_put_failure;
3525
3526         /* We are only sending parameters for a single TXQ at a time */
3527         params = nla_nest_start(msg, 1);
3528         if (!params)
3529                 goto nla_put_failure;
3530
3531         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
3532         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
3533          * 32 usec, so need to convert the value here. */
3534         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
3535         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
3536         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
3537         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
3538
3539         nla_nest_end(msg, params);
3540
3541         nla_nest_end(msg, txq);
3542
3543         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3544                 return 0;
3545  nla_put_failure:
3546         return -1;
3547 }
3548
3549
3550 static void nl80211_remove_iface(struct wpa_driver_nl80211_data *drv, int ifidx)
3551 {
3552         struct nl_msg *msg;
3553
3554         /* stop listening for EAPOL on this interface */
3555         del_ifidx(drv, ifidx);
3556
3557         msg = nlmsg_alloc();
3558         if (!msg)
3559                 goto nla_put_failure;
3560
3561         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3562                     0, NL80211_CMD_DEL_INTERFACE, 0);
3563         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
3564
3565         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
3566                 return;
3567  nla_put_failure:
3568         printf("Failed to remove interface.\n");
3569 }
3570
3571
3572 static int nl80211_create_iface(struct wpa_driver_nl80211_data *drv,
3573                                 const char *ifname,
3574                                 enum nl80211_iftype iftype,
3575                                 const u8 *addr)
3576 {
3577         struct nl_msg *msg, *flags = NULL;
3578         int ifidx;
3579         struct ifreq ifreq;
3580         struct iwreq iwr;
3581         int ret = -ENOBUFS;
3582
3583         msg = nlmsg_alloc();
3584         if (!msg)
3585                 return -1;
3586
3587         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3588                     0, NL80211_CMD_NEW_INTERFACE, 0);
3589         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3590         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
3591         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
3592
3593         if (iftype == NL80211_IFTYPE_MONITOR) {
3594                 int err;
3595
3596                 flags = nlmsg_alloc();
3597                 if (!flags)
3598                         goto nla_put_failure;
3599
3600                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
3601
3602                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
3603
3604                 nlmsg_free(flags);
3605
3606                 if (err)
3607                         goto nla_put_failure;
3608         }
3609
3610         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3611         if (ret) {
3612  nla_put_failure:
3613                 printf("Failed to create interface %s.\n", ifname);
3614                 return ret;
3615         }
3616
3617         ifidx = if_nametoindex(ifname);
3618
3619         if (ifidx <= 0)
3620                 return -1;
3621
3622         /* start listening for EAPOL on this interface */
3623         add_ifidx(drv, ifidx);
3624
3625         if (addr) {
3626                 switch (iftype) {
3627                 case NL80211_IFTYPE_AP:
3628                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
3629                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
3630                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
3631
3632                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
3633                                 nl80211_remove_iface(drv, ifidx);
3634                                 return -1;
3635                         }
3636                         break;
3637                 case NL80211_IFTYPE_WDS:
3638                         memset(&iwr, 0, sizeof(iwr));
3639                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
3640                         iwr.u.addr.sa_family = ARPHRD_ETHER;
3641                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
3642                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
3643                                 return -1;
3644                         break;
3645                 default:
3646                         /* nothing */
3647                         break;
3648                 }
3649         }
3650
3651         return ifidx;
3652 }
3653
3654
3655 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
3656 {
3657         struct wpa_driver_nl80211_data *drv = priv;
3658         int ifidx;
3659         struct i802_bss *bss;
3660
3661         bss = os_zalloc(sizeof(*bss));
3662         if (bss == NULL)
3663                 return -1;
3664         os_strlcpy(bss->ifname, ifname, IFNAMSIZ);
3665
3666         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
3667         if (ifidx < 0) {
3668                 os_free(bss);
3669                 return -1;
3670         }
3671         if (hostapd_set_iface_flags(priv, ifname, 1)) {
3672                 nl80211_remove_iface(priv, ifidx);
3673                 os_free(bss);
3674                 return -1;
3675         }
3676         bss->next = drv->bss.next;
3677         drv->bss.next = bss;
3678         return 0;
3679 }
3680
3681
3682 static int i802_bss_remove(void *priv, const char *ifname)
3683 {
3684         struct wpa_driver_nl80211_data *drv = priv;
3685         struct i802_bss *bss, *prev;
3686         nl80211_remove_iface(priv, if_nametoindex(ifname));
3687         prev = &drv->bss;
3688         bss = drv->bss.next;
3689         while (bss) {
3690                 if (os_strncmp(ifname, bss->ifname, IFNAMSIZ) == 0) {
3691                         prev->next = bss->next;
3692                         os_free(bss);
3693                         break;
3694                 }
3695                 prev = bss;
3696                 bss = bss->next;
3697         }
3698         return 0;
3699 }
3700
3701
3702 static int i802_set_beacon(const char *iface, void *priv,
3703                            const u8 *head, size_t head_len,
3704                            const u8 *tail, size_t tail_len, int dtim_period)
3705 {
3706         struct wpa_driver_nl80211_data *drv = priv;
3707         struct nl_msg *msg;
3708         u8 cmd = NL80211_CMD_NEW_BEACON;
3709         int ret;
3710         struct i802_bss *bss;
3711
3712         bss = get_bss(drv, iface);
3713         if (bss == NULL)
3714                 return -ENOENT;
3715
3716         msg = nlmsg_alloc();
3717         if (!msg)
3718                 return -ENOMEM;
3719
3720         wpa_printf(MSG_DEBUG, "nl80211: Set beacon (iface=%s beacon_set=%d)",
3721                    iface, bss->beacon_set);
3722         if (bss->beacon_set)
3723                 cmd = NL80211_CMD_SET_BEACON;
3724
3725         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3726                     0, cmd, 0);
3727         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
3728         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
3729         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
3730         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
3731         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, dtim_period);
3732
3733         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
3734         if (!ret)
3735                 bss->beacon_set = 1;
3736         return ret;
3737  nla_put_failure:
3738         return -ENOBUFS;
3739 }
3740
3741
3742 static int i802_del_beacon(struct wpa_driver_nl80211_data *drv)
3743 {
3744         struct nl_msg *msg;
3745
3746         msg = nlmsg_alloc();
3747         if (!msg)
3748                 return -ENOMEM;
3749
3750         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3751                     0, NL80211_CMD_DEL_BEACON, 0);
3752         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3753
3754         return send_and_recv_msgs(drv, msg, NULL, NULL);
3755  nla_put_failure:
3756         return -ENOBUFS;
3757 }
3758
3759
3760 static int i802_set_beacon_int(void *priv, int value)
3761 {
3762         struct wpa_driver_nl80211_data *drv = priv;
3763         struct nl_msg *msg;
3764
3765         drv->beacon_int = value;
3766
3767         if (!drv->bss.beacon_set)
3768                 return 0;
3769
3770         msg = nlmsg_alloc();
3771         if (!msg)
3772                 return -ENOMEM;
3773
3774         wpa_printf(MSG_DEBUG, "nl80211: Set beacon interval %d "
3775                    "(beacon_set=%d)", value, drv->bss.beacon_set);
3776         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
3777                     0, NL80211_CMD_SET_BEACON, 0);
3778         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3779
3780         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
3781
3782         return send_and_recv_msgs(drv, msg, NULL, NULL);
3783  nla_put_failure:
3784         return -ENOBUFS;
3785 }
3786
3787
3788 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
3789 {
3790         struct wpa_driver_nl80211_data *drv = priv;
3791         struct nl_msg *msg;
3792
3793         msg = nlmsg_alloc();
3794         if (!msg)
3795                 return -ENOMEM;
3796
3797         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
3798                     NL80211_CMD_SET_BSS, 0);
3799
3800         if (cts >= 0)
3801                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
3802         if (preamble >= 0)
3803                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
3804         if (slot >= 0)
3805                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
3806
3807         /* TODO: multi-BSS support */
3808         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
3809
3810         return send_and_recv_msgs(drv, msg, NULL, NULL);
3811  nla_put_failure:
3812         return -ENOBUFS;
3813 }
3814
3815
3816 static int i802_set_cts_protect(void *priv, int value)
3817 {
3818         return i802_set_bss(priv, value, -1, -1);
3819 }
3820
3821
3822 static int i802_set_preamble(void *priv, int value)
3823 {
3824         return i802_set_bss(priv, -1, value, -1);
3825 }
3826
3827
3828 static int i802_set_short_slot_time(void *priv, int value)
3829 {
3830         return i802_set_bss(priv, -1, -1, value);
3831 }
3832
3833
3834 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
3835 {
3836         switch (type) {
3837         case HOSTAPD_IF_VLAN:
3838                 return NL80211_IFTYPE_AP_VLAN;
3839         case HOSTAPD_IF_WDS:
3840                 return NL80211_IFTYPE_WDS;
3841         }
3842         return -1;
3843 }
3844
3845
3846 static int i802_if_add(const char *iface, void *priv,
3847                        enum hostapd_driver_if_type type, char *ifname,
3848                        const u8 *addr)
3849 {
3850         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
3851                 return -1;
3852         return 0;
3853 }
3854
3855
3856 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
3857                           char *ifname, const u8 *addr)
3858 {
3859         /* unused at the moment */
3860         return -1;
3861 }
3862
3863
3864 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
3865                           const char *ifname, const u8 *addr)
3866 {
3867         nl80211_remove_iface(priv, if_nametoindex(ifname));
3868         return 0;
3869 }
3870
3871
3872 struct phy_info_arg {
3873         u16 *num_modes;
3874         struct hostapd_hw_modes *modes;
3875 };
3876
3877 static int phy_info_handler(struct nl_msg *msg, void *arg)
3878 {
3879         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
3880         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
3881         struct phy_info_arg *phy_info = arg;
3882
3883         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
3884
3885         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
3886         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
3887                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
3888                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
3889                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
3890                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
3891                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
3892                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
3893         };
3894
3895         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
3896         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
3897                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
3898                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
3899         };
3900
3901         struct nlattr *nl_band;
3902         struct nlattr *nl_freq;
3903         struct nlattr *nl_rate;
3904         int rem_band, rem_freq, rem_rate;
3905         struct hostapd_hw_modes *mode;
3906         int idx, mode_is_set;
3907
3908         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
3909                   genlmsg_attrlen(gnlh, 0), NULL);
3910
3911         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
3912                 return NL_SKIP;
3913
3914         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
3915                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
3916                 if (!mode)
3917                         return NL_SKIP;
3918                 phy_info->modes = mode;
3919
3920                 mode_is_set = 0;
3921
3922                 mode = &phy_info->modes[*(phy_info->num_modes)];
3923                 memset(mode, 0, sizeof(*mode));
3924                 *(phy_info->num_modes) += 1;
3925
3926                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
3927                           nla_len(nl_band), NULL);
3928
3929                 if (tb_band[NL80211_BAND_ATTR_HT_CAPA]) {
3930                         mode->ht_capab = nla_get_u16(
3931                                 tb_band[NL80211_BAND_ATTR_HT_CAPA]);
3932                 }
3933
3934                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
3935                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
3936                                   nla_len(nl_freq), freq_policy);
3937                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
3938                                 continue;
3939                         mode->num_channels++;
3940                 }
3941
3942                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
3943                 if (!mode->channels)
3944                         return NL_SKIP;
3945
3946                 idx = 0;
3947
3948                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
3949                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
3950                                   nla_len(nl_freq), freq_policy);
3951                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
3952                                 continue;
3953
3954                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
3955                         mode->channels[idx].flag = 0;
3956
3957                         if (!mode_is_set) {
3958                                 /* crude heuristic */
3959                                 if (mode->channels[idx].freq < 4000)
3960                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
3961                                 else
3962                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
3963                                 mode_is_set = 1;
3964                         }
3965
3966                         /* crude heuristic */
3967                         if (mode->channels[idx].freq < 4000)
3968                                 if (mode->channels[idx].freq == 2848)
3969                                         mode->channels[idx].chan = 14;
3970                                 else
3971                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
3972                         else
3973                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
3974
3975                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
3976                                 mode->channels[idx].flag |=
3977                                         HOSTAPD_CHAN_DISABLED;
3978                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
3979                                 mode->channels[idx].flag |=
3980                                         HOSTAPD_CHAN_PASSIVE_SCAN;
3981                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
3982                                 mode->channels[idx].flag |=
3983                                         HOSTAPD_CHAN_NO_IBSS;
3984                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
3985                                 mode->channels[idx].flag |=
3986                                         HOSTAPD_CHAN_RADAR;
3987
3988                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
3989                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
3990                                 mode->channels[idx].max_tx_power =
3991                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
3992
3993                         idx++;
3994                 }
3995
3996                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
3997                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
3998                                   nla_len(nl_rate), rate_policy);
3999                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
4000                                 continue;
4001                         mode->num_rates++;
4002                 }
4003
4004                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
4005                 if (!mode->rates)
4006                         return NL_SKIP;
4007
4008                 idx = 0;
4009
4010                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
4011                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
4012                                   nla_len(nl_rate), rate_policy);
4013                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
4014                                 continue;
4015                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
4016
4017                         /* crude heuristic */
4018                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
4019                             mode->rates[idx].rate > 200)
4020                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
4021
4022                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
4023                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
4024
4025                         idx++;
4026                 }
4027         }
4028
4029         return NL_SKIP;
4030 }
4031
4032 static struct hostapd_hw_modes *i802_add_11b(struct hostapd_hw_modes *modes,
4033                                              u16 *num_modes)
4034 {
4035         u16 m;
4036         struct hostapd_hw_modes *mode11g = NULL, *nmodes, *mode;
4037         int i, mode11g_idx = -1;
4038
4039         /* If only 802.11g mode is included, use it to construct matching
4040          * 802.11b mode data. */
4041
4042         for (m = 0; m < *num_modes; m++) {
4043                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211B)
4044                         return modes; /* 802.11b already included */
4045                 if (modes[m].mode == HOSTAPD_MODE_IEEE80211G)
4046                         mode11g_idx = m;
4047         }
4048
4049         if (mode11g_idx < 0)
4050                 return modes; /* 2.4 GHz band not supported at all */
4051
4052         nmodes = os_realloc(modes, (*num_modes + 1) * sizeof(*nmodes));
4053         if (nmodes == NULL)
4054                 return modes; /* Could not add 802.11b mode */
4055
4056         mode = &nmodes[*num_modes];
4057         os_memset(mode, 0, sizeof(*mode));
4058         (*num_modes)++;
4059         modes = nmodes;
4060
4061         mode->mode = HOSTAPD_MODE_IEEE80211B;
4062
4063         mode11g = &modes[mode11g_idx];
4064         mode->num_channels = mode11g->num_channels;
4065         mode->channels = os_malloc(mode11g->num_channels *
4066                                    sizeof(struct hostapd_channel_data));
4067         if (mode->channels == NULL) {
4068                 (*num_modes)--;
4069                 return modes; /* Could not add 802.11b mode */
4070         }
4071         os_memcpy(mode->channels, mode11g->channels,
4072                   mode11g->num_channels * sizeof(struct hostapd_channel_data));
4073
4074         mode->num_rates = 0;
4075         mode->rates = os_malloc(4 * sizeof(struct hostapd_rate_data));
4076         if (mode->rates == NULL) {
4077                 os_free(mode->channels);
4078                 (*num_modes)--;
4079                 return modes; /* Could not add 802.11b mode */
4080         }
4081
4082         for (i = 0; i < mode11g->num_rates; i++) {
4083                 if (mode11g->rates[i].rate > 110 ||
4084                     mode11g->rates[i].flags &
4085                     (HOSTAPD_RATE_ERP | HOSTAPD_RATE_OFDM))
4086                         continue;
4087                 mode->rates[mode->num_rates] = mode11g->rates[i];
4088                 mode->num_rates++;
4089                 if (mode->num_rates == 4)
4090                         break;
4091         }
4092
4093         if (mode->num_rates == 0) {
4094                 os_free(mode->channels);
4095                 os_free(mode->rates);
4096                 (*num_modes)--;
4097                 return modes; /* No 802.11b rates */
4098         }
4099
4100         wpa_printf(MSG_DEBUG, "nl80211: Added 802.11b mode based on 802.11g "
4101                    "information");
4102
4103         return modes;
4104 }
4105
4106 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
4107                                                          u16 *num_modes,
4108                                                          u16 *flags)
4109 {
4110         struct wpa_driver_nl80211_data *drv = priv;
4111         struct nl_msg *msg;
4112         struct phy_info_arg result = {
4113                 .num_modes = num_modes,
4114                 .modes = NULL,
4115         };
4116
4117         *num_modes = 0;
4118         *flags = 0;
4119
4120         msg = nlmsg_alloc();
4121         if (!msg)
4122                 return NULL;
4123
4124         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4125                     0, NL80211_CMD_GET_WIPHY, 0);
4126
4127         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->ifname));
4128
4129         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
4130                 return i802_add_11b(result.modes, num_modes);
4131  nla_put_failure:
4132         return NULL;
4133 }
4134
4135
4136 static int i802_set_sta_vlan(void *priv, const u8 *addr,
4137                              const char *ifname, int vlan_id)
4138 {
4139         struct wpa_driver_nl80211_data *drv = priv;
4140         struct nl_msg *msg;
4141
4142         msg = nlmsg_alloc();
4143         if (!msg)
4144                 return -ENOMEM;
4145
4146         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4147                     0, NL80211_CMD_SET_STATION, 0);
4148
4149         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4150                     if_nametoindex(drv->ifname));
4151         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
4152         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4153                     if_nametoindex(ifname));
4154
4155         return send_and_recv_msgs(drv, msg, NULL, NULL);
4156  nla_put_failure:
4157         return -ENOBUFS;
4158 }
4159
4160
4161 static int i802_set_country(void *priv, const char *country)
4162 {
4163         struct wpa_driver_nl80211_data *drv = priv;
4164         struct nl_msg *msg;
4165         char alpha2[3];
4166
4167         msg = nlmsg_alloc();
4168         if (!msg)
4169                 return -ENOMEM;
4170
4171         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4172                     0, NL80211_CMD_REQ_SET_REG, 0);
4173
4174         alpha2[0] = country[0];
4175         alpha2[1] = country[1];
4176         alpha2[2] = '\0';
4177         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
4178
4179         return send_and_recv_msgs(drv, msg, NULL, NULL);
4180  nla_put_failure:
4181         return -ENOBUFS;
4182 }
4183
4184
4185 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
4186                                int ok)
4187 {
4188         struct ieee80211_hdr *hdr;
4189         u16 fc, type, stype;
4190
4191         hdr = (struct ieee80211_hdr *) buf;
4192         fc = le_to_host16(hdr->frame_control);
4193
4194         type = WLAN_FC_GET_TYPE(fc);
4195         stype = WLAN_FC_GET_STYPE(fc);
4196
4197         switch (type) {
4198         case WLAN_FC_TYPE_MGMT:
4199                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
4200                            ok ? "ACK" : "fail");
4201                 hostapd_mgmt_tx_cb(hapd, buf, len, stype, ok);
4202                 break;
4203         case WLAN_FC_TYPE_CTRL:
4204                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
4205                            ok ? "ACK" : "fail");
4206                 break;
4207         case WLAN_FC_TYPE_DATA:
4208                 hostapd_tx_status(hapd, hdr->addr1, buf, len, ok);
4209                 break;
4210         default:
4211                 printf("unknown TX callback frame type %d\n", type);
4212                 break;
4213         }
4214 }
4215
4216
4217 static void handle_frame(struct wpa_driver_nl80211_data *drv,
4218                          struct hostapd_iface *iface, u8 *buf, size_t len,
4219                          struct hostapd_frame_info *hfi,
4220                          enum ieee80211_msg_type msg_type)
4221 {
4222         struct ieee80211_hdr *hdr;
4223         u16 fc, type, stype;
4224         size_t data_len = len;
4225         struct hostapd_data *hapd = NULL;
4226         int broadcast_bssid = 0;
4227         size_t i;
4228         u8 *bssid;
4229
4230         /*
4231          * PS-Poll frames are 16 bytes. All other frames are
4232          * 24 bytes or longer.
4233          */
4234         if (len < 16)
4235                 return;
4236
4237         hdr = (struct ieee80211_hdr *) buf;
4238         fc = le_to_host16(hdr->frame_control);
4239
4240         type = WLAN_FC_GET_TYPE(fc);
4241         stype = WLAN_FC_GET_STYPE(fc);
4242
4243         switch (type) {
4244         case WLAN_FC_TYPE_DATA:
4245                 if (len < 24)
4246                         return;
4247                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
4248                 case WLAN_FC_TODS:
4249                         bssid = hdr->addr1;
4250                         break;
4251                 case WLAN_FC_FROMDS:
4252                         bssid = hdr->addr2;
4253                         break;
4254                 default:
4255                         /* discard */
4256                         return;
4257                 }
4258                 break;
4259         case WLAN_FC_TYPE_CTRL:
4260                 /* discard non-ps-poll frames */
4261                 if (stype != WLAN_FC_STYPE_PSPOLL)
4262                         return;
4263                 bssid = hdr->addr1;
4264                 break;
4265         case WLAN_FC_TYPE_MGMT:
4266                 bssid = hdr->addr3;
4267                 break;
4268         default:
4269                 /* discard */
4270                 return;
4271         }
4272
4273         /* find interface frame belongs to */
4274         for (i = 0; i < iface->num_bss; i++) {
4275                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
4276                         hapd = iface->bss[i];
4277                         break;
4278                 }
4279         }
4280
4281         if (hapd == NULL) {
4282                 hapd = iface->bss[0];
4283
4284                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
4285                     bssid[2] != 0xff || bssid[3] != 0xff ||
4286                     bssid[4] != 0xff || bssid[5] != 0xff) {
4287                         /*
4288                          * Unknown BSSID - drop frame if this is not from
4289                          * passive scanning or a beacon (at least ProbeReq
4290                          * frames to other APs may be allowed through RX
4291                          * filtering in the wlan hw/driver)
4292                          */
4293                         if ((type != WLAN_FC_TYPE_MGMT ||
4294                              stype != WLAN_FC_STYPE_BEACON))
4295                                 return;
4296                 } else
4297                         broadcast_bssid = 1;
4298         }
4299
4300         switch (msg_type) {
4301         case ieee80211_msg_normal:
4302                 /* continue processing */
4303                 break;
4304         case ieee80211_msg_tx_callback_ack:
4305                 handle_tx_callback(hapd, buf, data_len, 1);
4306                 return;
4307         case ieee80211_msg_tx_callback_fail:
4308                 handle_tx_callback(hapd, buf, data_len, 0);
4309                 return;
4310         }
4311
4312         switch (type) {
4313         case WLAN_FC_TYPE_MGMT:
4314                 if (stype != WLAN_FC_STYPE_BEACON &&
4315                     stype != WLAN_FC_STYPE_PROBE_REQ)
4316                         wpa_printf(MSG_MSGDUMP, "MGMT");
4317                 if (broadcast_bssid) {
4318                         for (i = 0; i < iface->num_bss; i++)
4319                                 hostapd_mgmt_rx(iface->bss[i], buf, data_len,
4320                                                 stype, hfi);
4321                 } else
4322                         hostapd_mgmt_rx(hapd, buf, data_len, stype, hfi);
4323                 break;
4324         case WLAN_FC_TYPE_CTRL:
4325                 /* can only get here with PS-Poll frames */
4326                 wpa_printf(MSG_DEBUG, "CTRL");
4327                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
4328                 break;
4329         case WLAN_FC_TYPE_DATA:
4330                 hostapd_rx_from_unknown_sta(drv->hapd, hdr->addr2);
4331                 break;
4332         }
4333 }
4334
4335
4336 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
4337 {
4338         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4339         struct sockaddr_ll lladdr;
4340         unsigned char buf[3000];
4341         int len;
4342         socklen_t fromlen = sizeof(lladdr);
4343
4344         len = recvfrom(sock, buf, sizeof(buf), 0,
4345                        (struct sockaddr *)&lladdr, &fromlen);
4346         if (len < 0) {
4347                 perror("recv");
4348                 return;
4349         }
4350
4351         if (have_ifidx(drv, lladdr.sll_ifindex)) {
4352                 struct hostapd_data *hapd;
4353                 hapd = hostapd_sta_get_bss(drv->hapd, lladdr.sll_addr);
4354                 if (!hapd)
4355                         return;
4356                 hostapd_eapol_receive(hapd, lladdr.sll_addr, buf, len);
4357         }
4358 }
4359
4360
4361 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
4362 {
4363         struct wpa_driver_nl80211_data *drv = eloop_ctx;
4364         int len;
4365         unsigned char buf[3000];
4366         struct hostapd_data *hapd = drv->hapd;
4367         struct ieee80211_radiotap_iterator iter;
4368         int ret;
4369         struct hostapd_frame_info hfi;
4370         int injected = 0, failed = 0, msg_type, rxflags = 0;
4371
4372         len = recv(sock, buf, sizeof(buf), 0);
4373         if (len < 0) {
4374                 perror("recv");
4375                 return;
4376         }
4377
4378         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
4379                 printf("received invalid radiotap frame\n");
4380                 return;
4381         }
4382
4383         memset(&hfi, 0, sizeof(hfi));
4384
4385         while (1) {
4386                 ret = ieee80211_radiotap_iterator_next(&iter);
4387                 if (ret == -ENOENT)
4388                         break;
4389                 if (ret) {
4390                         printf("received invalid radiotap frame (%d)\n", ret);
4391                         return;
4392                 }
4393                 switch (iter.this_arg_index) {
4394                 case IEEE80211_RADIOTAP_FLAGS:
4395                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
4396                                 len -= 4;
4397                         break;
4398                 case IEEE80211_RADIOTAP_RX_FLAGS:
4399                         rxflags = 1;
4400                         break;
4401                 case IEEE80211_RADIOTAP_TX_FLAGS:
4402                         injected = 1;
4403                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
4404                                         IEEE80211_RADIOTAP_F_TX_FAIL;
4405                         break;
4406                 case IEEE80211_RADIOTAP_DATA_RETRIES:
4407                         break;
4408                 case IEEE80211_RADIOTAP_CHANNEL:
4409                         /* TODO convert from freq/flags to channel number
4410                         hfi.channel = XXX;
4411                         hfi.phytype = XXX;
4412                          */
4413                         break;
4414                 case IEEE80211_RADIOTAP_RATE:
4415                         hfi.datarate = *iter.this_arg * 5;
4416                         break;
4417                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
4418                         hfi.ssi_signal = *iter.this_arg;
4419                         break;
4420                 }
4421         }
4422
4423         if (rxflags && injected)
4424                 return;
4425
4426         if (!injected)
4427                 msg_type = ieee80211_msg_normal;
4428         else if (failed)
4429                 msg_type = ieee80211_msg_tx_callback_fail;
4430         else
4431                 msg_type = ieee80211_msg_tx_callback_ack;
4432
4433         handle_frame(drv, hapd->iface, buf + iter.max_length,
4434                      len - iter.max_length, &hfi, msg_type);
4435 }
4436
4437
4438 /*
4439  * we post-process the filter code later and rewrite
4440  * this to the offset to the last instruction
4441  */
4442 #define PASS    0xFF
4443 #define FAIL    0xFE
4444
4445 static struct sock_filter msock_filter_insns[] = {
4446         /*
4447          * do a little-endian load of the radiotap length field
4448          */
4449         /* load lower byte into A */
4450         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 2),
4451         /* put it into X (== index register) */
4452         BPF_STMT(BPF_MISC| BPF_TAX, 0),
4453         /* load upper byte into A */
4454         BPF_STMT(BPF_LD  | BPF_B | BPF_ABS, 3),
4455         /* left-shift it by 8 */
4456         BPF_STMT(BPF_ALU | BPF_LSH | BPF_K, 8),
4457         /* or with X */
4458         BPF_STMT(BPF_ALU | BPF_OR | BPF_X, 0),
4459         /* put result into X */
4460         BPF_STMT(BPF_MISC| BPF_TAX, 0),
4461
4462         /*
4463          * Allow management frames through, this also gives us those
4464          * management frames that we sent ourselves with status
4465          */
4466         /* load the lower byte of the IEEE 802.11 frame control field */
4467         BPF_STMT(BPF_LD  | BPF_B | BPF_IND, 0),
4468         /* mask off frame type and version */
4469         BPF_STMT(BPF_ALU | BPF_AND | BPF_K, 0xF),
4470         /* accept frame if it's both 0, fall through otherwise */
4471         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0, PASS, 0),
4472
4473         /*
4474          * TODO: add a bit to radiotap RX flags that indicates
4475          * that the sending station is not associated, then
4476          * add a filter here that filters on our DA and that flag
4477          * to allow us to deauth frames to that bad station.
4478          *
4479          * Not a regression -- we didn't do it before either.
4480          */
4481
4482 #if 0
4483         /*
4484          * drop non-data frames, WDS frames
4485          */
4486         /* load the lower byte of the frame control field */
4487         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
4488         /* mask off QoS bit */
4489         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x0c),
4490         /* drop non-data frames */
4491         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 8, 0, FAIL),
4492         /* load the upper byte of the frame control field */
4493         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
4494         /* mask off toDS/fromDS */
4495         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x03),
4496         /* drop WDS frames */
4497         BPF_JUMP(BPF_JMP  | BPF_JEQ | BPF_K, 3, FAIL, 0),
4498 #endif
4499
4500         /*
4501          * add header length to index
4502          */
4503         /* load the lower byte of the frame control field */
4504         BPF_STMT(BPF_LD   | BPF_B | BPF_IND, 0),
4505         /* mask off QoS bit */
4506         BPF_STMT(BPF_ALU  | BPF_AND | BPF_K, 0x80),
4507         /* right shift it by 6 to give 0 or 2 */
4508         BPF_STMT(BPF_ALU  | BPF_RSH | BPF_K, 6),
4509         /* add data frame header length */
4510         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_K, 24),
4511         /* add index, was start of 802.11 header */
4512         BPF_STMT(BPF_ALU  | BPF_ADD | BPF_X, 0),
4513         /* move to index, now start of LL header */
4514         BPF_STMT(BPF_MISC | BPF_TAX, 0),
4515
4516         /*
4517          * Accept empty data frames, we use those for
4518          * polling activity.
4519          */
4520         BPF_STMT(BPF_LD  | BPF_W | BPF_LEN, 0),
4521         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_X, 0, PASS, 0),
4522
4523         /*
4524          * Accept EAPOL frames
4525          */
4526         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 0),
4527         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0xAAAA0300, 0, FAIL),
4528         BPF_STMT(BPF_LD  | BPF_W | BPF_IND, 4),
4529         BPF_JUMP(BPF_JMP | BPF_JEQ | BPF_K, 0x0000888E, PASS, FAIL),
4530
4531         /* keep these last two statements or change the code below */
4532         /* return 0 == "DROP" */
4533         BPF_STMT(BPF_RET | BPF_K, 0),
4534         /* return ~0 == "keep all" */
4535         BPF_STMT(BPF_RET | BPF_K, ~0),
4536 };
4537
4538 static struct sock_fprog msock_filter = {
4539         .len = sizeof(msock_filter_insns)/sizeof(msock_filter_insns[0]),
4540         .filter = msock_filter_insns,
4541 };
4542
4543
4544 static int add_monitor_filter(int s)
4545 {
4546         int idx;
4547
4548         /* rewrite all PASS/FAIL jump offsets */
4549         for (idx = 0; idx < msock_filter.len; idx++) {
4550                 struct sock_filter *insn = &msock_filter_insns[idx];
4551
4552                 if (BPF_CLASS(insn->code) == BPF_JMP) {
4553                         if (insn->code == (BPF_JMP|BPF_JA)) {
4554                                 if (insn->k == PASS)
4555                                         insn->k = msock_filter.len - idx - 2;
4556                                 else if (insn->k == FAIL)
4557                                         insn->k = msock_filter.len - idx - 3;
4558                         }
4559
4560                         if (insn->jt == PASS)
4561                                 insn->jt = msock_filter.len - idx - 2;
4562                         else if (insn->jt == FAIL)
4563                                 insn->jt = msock_filter.len - idx - 3;
4564
4565                         if (insn->jf == PASS)
4566                                 insn->jf = msock_filter.len - idx - 2;
4567                         else if (insn->jf == FAIL)
4568                                 insn->jf = msock_filter.len - idx - 3;
4569                 }
4570         }
4571
4572         if (setsockopt(s, SOL_SOCKET, SO_ATTACH_FILTER,
4573                        &msock_filter, sizeof(msock_filter))) {
4574                 perror("SO_ATTACH_FILTER");
4575                 return -1;
4576         }
4577
4578         return 0;
4579 }
4580
4581
4582 static int nl80211_create_monitor_interface(struct wpa_driver_nl80211_data *drv)
4583 {
4584         char buf[IFNAMSIZ];
4585         struct sockaddr_ll ll;
4586         int optval;
4587         socklen_t optlen;
4588
4589         snprintf(buf, IFNAMSIZ, "mon.%s", drv->ifname);
4590         buf[IFNAMSIZ - 1] = '\0';
4591
4592         drv->monitor_ifidx =
4593                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
4594
4595         if (drv->monitor_ifidx < 0)
4596                 return -1;
4597
4598         if (hostapd_set_iface_flags(drv, buf, 1))
4599                 goto error;
4600
4601         memset(&ll, 0, sizeof(ll));
4602         ll.sll_family = AF_PACKET;
4603         ll.sll_ifindex = drv->monitor_ifidx;
4604         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
4605         if (drv->monitor_sock < 0) {
4606                 perror("socket[PF_PACKET,SOCK_RAW]");
4607                 goto error;
4608         }
4609
4610         if (add_monitor_filter(drv->monitor_sock)) {
4611                 wpa_printf(MSG_INFO, "Failed to set socket filter for monitor "
4612                            "interface; do filtering in user space");
4613                 /* This works, but will cost in performance. */
4614         }
4615
4616         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
4617                  sizeof(ll)) < 0) {
4618                 perror("monitor socket bind");
4619                 goto error;
4620         }
4621
4622         optlen = sizeof(optval);
4623         optval = 20;
4624         if (setsockopt
4625             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
4626                 perror("Failed to set socket priority");
4627                 goto error;
4628         }
4629
4630         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
4631                                      drv, NULL)) {
4632                 printf("Could not register monitor read socket\n");
4633                 goto error;
4634         }
4635
4636         return 0;
4637  error:
4638         nl80211_remove_iface(drv, drv->monitor_ifidx);
4639         return -1;
4640 }
4641
4642
4643 static int nl80211_set_mode(struct wpa_driver_nl80211_data *drv, const char *ifname,
4644                             int mode)
4645 {
4646         struct nl_msg *msg;
4647         int ret = -ENOBUFS;
4648
4649         msg = nlmsg_alloc();
4650         if (!msg)
4651                 return -ENOMEM;
4652
4653         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
4654                     0, NL80211_CMD_SET_INTERFACE, 0);
4655         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
4656                     if_nametoindex(ifname));
4657         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, mode);
4658
4659         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
4660         if (!ret)
4661                 return 0;
4662  nla_put_failure:
4663         wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
4664                    "mode.", ifname);
4665         return ret;
4666 }
4667
4668
4669 #ifdef CONFIG_IEEE80211N
4670 static void i802_add_neighbor(struct wpa_driver_nl80211_data *drv, u8 *bssid,
4671                               int freq, u8 *ie, size_t ie_len)
4672 {
4673         struct ieee802_11_elems elems;
4674         int ht, pri_chan = 0, sec_chan = 0;
4675         struct ieee80211_ht_operation *oper;
4676         struct hostapd_neighbor_bss *nnei;
4677
4678         ieee802_11_parse_elems(ie, ie_len, &elems, 0);
4679         ht = elems.ht_capabilities || elems.ht_operation;
4680         if (elems.ht_operation && elems.ht_operation_len >= sizeof(*oper)) {
4681                 oper = (struct ieee80211_ht_operation *) elems.ht_operation;
4682                 pri_chan = oper->control_chan;
4683                 if (oper->ht_param & HT_INFO_HT_PARAM_REC_TRANS_CHNL_WIDTH) {
4684                         if (oper->ht_param &
4685                             HT_INFO_HT_PARAM_SECONDARY_CHNL_ABOVE)
4686                                 sec_chan = pri_chan + 4;
4687                         else if (oper->ht_param &
4688                             HT_INFO_HT_PARAM_SECONDARY_CHNL_BELOW)
4689                                 sec_chan = pri_chan - 4;
4690                 }
4691         }
4692
4693         wpa_printf(MSG_DEBUG, "nl80211: Neighboring BSS - bssid=" MACSTR
4694                    " freq=%d MHz HT=%d pri_chan=%d sec_chan=%d",
4695                    MAC2STR(bssid), freq, ht, pri_chan, sec_chan);
4696
4697         nnei = os_realloc(drv->neighbors, (drv->num_neighbors + 1) *
4698                           sizeof(struct hostapd_neighbor_bss));
4699         if (nnei == NULL)
4700                 return;
4701         drv->neighbors = nnei;
4702         nnei = &nnei[drv->num_neighbors];
4703         os_memcpy(nnei->bssid, bssid, ETH_ALEN);
4704         nnei->freq = freq;
4705         nnei->ht = !!ht;
4706         nnei->pri_chan = pri_chan;
4707         nnei->sec_chan = sec_chan;
4708         drv->num_neighbors++;
4709 }
4710
4711
4712 static int i802_get_scan_freq(struct iw_event *iwe, int *freq)
4713 {
4714         int divi = 1000000, i;
4715
4716         if (iwe->u.freq.e == 0) {
4717                 /*
4718                  * Some drivers do not report frequency, but a channel.
4719                  * Try to map this to frequency by assuming they are using
4720                  * IEEE 802.11b/g.  But don't overwrite a previously parsed
4721                  * frequency if the driver sends both frequency and channel,
4722                  * since the driver may be sending an A-band channel that we
4723                  * don't handle here.
4724                  */
4725
4726                 if (*freq)
4727                         return 0;
4728
4729                 if (iwe->u.freq.m >= 1 && iwe->u.freq.m <= 13) {
4730                         *freq = 2407 + 5 * iwe->u.freq.m;
4731                         return 0;
4732                 } else if (iwe->u.freq.m == 14) {
4733                         *freq = 2484;
4734                         return 0;
4735                 }
4736         }
4737
4738         if (iwe->u.freq.e > 6) {
4739                 wpa_printf(MSG_DEBUG, "Invalid freq in scan results: "
4740                            "m=%d e=%d", iwe->u.freq.m, iwe->u.freq.e);
4741                 return -1;
4742         }
4743
4744         for (i = 0; i < iwe->u.freq.e; i++)
4745                 divi /= 10;
4746         *freq = iwe->u.freq.m / divi;
4747         return 0;
4748 }
4749
4750
4751 static int i802_parse_scan(struct wpa_driver_nl80211_data *drv, u8 *res_buf,
4752                            size_t len)
4753 {
4754         size_t ap_num = 0;
4755         int first;
4756         struct iw_event iwe_buf, *iwe = &iwe_buf;
4757         char *pos, *end, *custom;
4758         u8 bssid[ETH_ALEN];
4759         int freq = 0;
4760         u8 *ie = NULL;
4761         size_t ie_len = 0;
4762
4763         ap_num = 0;
4764         first = 1;
4765
4766         pos = (char *) res_buf;
4767         end = (char *) res_buf + len;
4768
4769         while (pos + IW_EV_LCP_LEN <= end) {
4770                 /* Event data may be unaligned, so make a local, aligned copy
4771                  * before processing. */
4772                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4773                 if (iwe->len <= IW_EV_LCP_LEN)
4774                         break;
4775
4776                 custom = pos + IW_EV_POINT_LEN;
4777                 if (iwe->cmd == IWEVGENIE) {
4778                         /* WE-19 removed the pointer from struct iw_point */
4779                         char *dpos = (char *) &iwe_buf.u.data.length;
4780                         int dlen = dpos - (char *) &iwe_buf;
4781                         os_memcpy(dpos, pos + IW_EV_LCP_LEN,
4782                                   sizeof(struct iw_event) - dlen);
4783                 } else {
4784                         os_memcpy(&iwe_buf, pos, sizeof(struct iw_event));
4785                         custom += IW_EV_POINT_OFF;
4786                 }
4787
4788                 switch (iwe->cmd) {
4789                 case SIOCGIWAP:
4790                         if (!first)
4791                                 i802_add_neighbor(drv, bssid, freq, ie,
4792                                                   ie_len);
4793                         first = 0;
4794                         os_memcpy(bssid, iwe->u.ap_addr.sa_data, ETH_ALEN);
4795                         freq = 0;
4796                         ie = NULL;
4797                         ie_len = 0;
4798                         break;
4799                 case SIOCGIWFREQ:
4800                         i802_get_scan_freq(iwe, &freq);
4801                         break;
4802                 case IWEVGENIE:
4803                         if (custom + iwe->u.data.length > end) {
4804                                 wpa_printf(MSG_ERROR, "IWEVGENIE overflow");
4805                                 return -1;
4806                         }
4807                         ie = (u8 *) custom;
4808                         ie_len = iwe->u.data.length;
4809                         break;
4810                 }
4811
4812                 pos += iwe->len;
4813         }
4814
4815         if (!first)
4816                 i802_add_neighbor(drv, bssid, freq, ie, ie_len);
4817
4818         return 0;
4819 }
4820
4821
4822 static int i802_get_ht_scan_res(struct wpa_driver_nl80211_data *drv)
4823 {
4824         struct iwreq iwr;
4825         u8 *res_buf;
4826         size_t res_buf_len;
4827         int res;
4828
4829         res_buf_len = IW_SCAN_MAX_DATA;
4830         for (;;) {
4831                 res_buf = os_malloc(res_buf_len);
4832                 if (res_buf == NULL)
4833                         return -1;
4834                 os_memset(&iwr, 0, sizeof(iwr));
4835                 os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4836                 iwr.u.data.pointer = res_buf;
4837                 iwr.u.data.length = res_buf_len;
4838
4839                 if (ioctl(drv->ioctl_sock, SIOCGIWSCAN, &iwr) == 0)
4840                         break;
4841
4842                 if (errno == E2BIG && res_buf_len < 65535) {
4843                         os_free(res_buf);
4844                         res_buf = NULL;
4845                         res_buf_len *= 2;
4846                         if (res_buf_len > 65535)
4847                                 res_buf_len = 65535; /* 16-bit length field */
4848                         wpa_printf(MSG_DEBUG, "Scan results did not fit - "
4849                                    "trying larger buffer (%lu bytes)",
4850                                    (unsigned long) res_buf_len);
4851                 } else {
4852                         perror("ioctl[SIOCGIWSCAN]");
4853                         os_free(res_buf);
4854                         return -1;
4855                 }
4856         }
4857
4858         if (iwr.u.data.length > res_buf_len) {
4859                 os_free(res_buf);
4860                 return -1;
4861         }
4862
4863         res = i802_parse_scan(drv, res_buf, iwr.u.data.length);
4864         os_free(res_buf);
4865
4866         return res;
4867 }
4868
4869
4870 static int i802_is_event_wireless_scan_complete(char *data, int len)
4871 {
4872         struct iw_event iwe_buf, *iwe = &iwe_buf;
4873         char *pos, *end;
4874
4875         pos = data;
4876         end = data + len;
4877
4878         while (pos + IW_EV_LCP_LEN <= end) {
4879                 /* Event data may be unaligned, so make a local, aligned copy
4880                  * before processing. */
4881                 os_memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
4882                 if (iwe->cmd == SIOCGIWSCAN)
4883                         return 1;
4884
4885                 pos += iwe->len;
4886         }
4887
4888         return 0;
4889 }
4890
4891
4892 static int i802_is_rtm_scan_complete(int ifindex, struct nlmsghdr *h, int len)
4893 {
4894         struct ifinfomsg *ifi;
4895         int attrlen, _nlmsg_len, rta_len;
4896         struct rtattr *attr;
4897
4898         if (len < (int) sizeof(*ifi))
4899                 return 0;
4900
4901         ifi = NLMSG_DATA(h);
4902
4903         if (ifindex != ifi->ifi_index)
4904                 return 0; /* event for foreign ifindex */
4905
4906         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
4907
4908         attrlen = h->nlmsg_len - _nlmsg_len;
4909         if (attrlen < 0)
4910                 return 0;
4911
4912         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
4913
4914         rta_len = RTA_ALIGN(sizeof(struct rtattr));
4915         while (RTA_OK(attr, attrlen)) {
4916                 if (attr->rta_type == IFLA_WIRELESS &&
4917                     i802_is_event_wireless_scan_complete(
4918                             ((char *) attr) + rta_len,
4919                             attr->rta_len - rta_len))
4920                         return 1;
4921                 attr = RTA_NEXT(attr, attrlen);
4922         }
4923
4924         return 0;
4925 }
4926
4927
4928 static int i802_is_scan_complete(int s, int ifindex)
4929 {
4930         char buf[1024];
4931         int left;
4932         struct nlmsghdr *h;
4933
4934         left = recv(s, buf, sizeof(buf), MSG_DONTWAIT);
4935         if (left < 0) {
4936                 perror("recv(netlink)");
4937                 return 0;
4938         }
4939
4940         h = (struct nlmsghdr *) buf;
4941         while (left >= (int) sizeof(*h)) {
4942                 int len, plen;
4943
4944                 len = h->nlmsg_len;
4945                 plen = len - sizeof(*h);
4946                 if (len > left || plen < 0) {
4947                         wpa_printf(MSG_DEBUG, "Malformed netlink message: "
4948                                    "len=%d left=%d plen=%d",
4949                                    len, left, plen);
4950                         break;
4951                 }
4952
4953                 switch (h->nlmsg_type) {
4954                 case RTM_NEWLINK:
4955                         if (i802_is_rtm_scan_complete(ifindex, h, plen))
4956                                 return 1;
4957                         break;
4958                 }
4959
4960                 len = NLMSG_ALIGN(len);
4961                 left -= len;
4962                 h = (struct nlmsghdr *) ((char *) h + len);
4963         }
4964
4965         return 0;
4966 }
4967
4968
4969 static int i802_ht_scan(struct wpa_driver_nl80211_data *drv)
4970 {
4971         struct iwreq iwr;
4972         int s, res, ifindex;
4973         struct sockaddr_nl local;
4974         time_t now, end;
4975         fd_set rfds;
4976         struct timeval tv;
4977
4978         wpa_printf(MSG_DEBUG, "nl80211: Scanning overlapping BSSes before "
4979                    "starting HT 20/40 MHz BSS");
4980
4981         /* Request a new scan */
4982         /* TODO: would be enough to scan the selected band */
4983         os_memset(&iwr, 0, sizeof(iwr));
4984         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
4985         if (ioctl(drv->ioctl_sock, SIOCSIWSCAN, &iwr) < 0) {
4986                 perror("ioctl[SIOCSIWSCAN]");
4987                 return -1;
4988         }
4989
4990         ifindex = if_nametoindex(drv->ifname);
4991
4992         /* Wait for scan completion event or timeout */
4993         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
4994         if (s < 0) {
4995                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
4996                 return -1;
4997         }
4998
4999         os_memset(&local, 0, sizeof(local));
5000         local.nl_family = AF_NETLINK;
5001         local.nl_groups = RTMGRP_LINK;
5002         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
5003                 perror("bind(netlink)");
5004                 close(s);
5005                 return -1;
5006         }
5007
5008         time(&end);
5009         end += 30; /* Wait at most 30 seconds for scan results */
5010         for (;;) {
5011                 time(&now);
5012                 tv.tv_sec = end > now ? end - now : 0;
5013                 tv.tv_usec = 0;
5014                 FD_ZERO(&rfds);
5015                 FD_SET(s, &rfds);
5016                 res = select(s + 1, &rfds, NULL, NULL, &tv);
5017                 if (res < 0) {
5018                         perror("select");
5019                         /* Assume results are ready after 10 seconds wait */
5020                         os_sleep(10, 0);
5021                         break;
5022                 } else if (res) {
5023                         if (i802_is_scan_complete(s, ifindex)) {
5024                                 wpa_printf(MSG_DEBUG, "nl80211: Scan "
5025                                            "completed");
5026                                 break;
5027                         }
5028                 } else {
5029                         wpa_printf(MSG_DEBUG, "nl80211: Scan timeout");
5030                         /* Assume results are ready to be read now */
5031                         break;
5032                 }
5033         }
5034
5035         close(s);
5036
5037         return i802_get_ht_scan_res(drv);
5038 }
5039 #endif /* CONFIG_IEEE80211N */
5040
5041
5042 static int i802_init_sockets(struct wpa_driver_nl80211_data *drv, const u8 *bssid)
5043 {
5044         struct ifreq ifr;
5045
5046         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
5047         if (drv->ioctl_sock < 0) {
5048                 perror("socket[PF_INET,SOCK_DGRAM]");
5049                 return -1;
5050         }
5051
5052         /* start listening for EAPOL on the default AP interface */
5053         add_ifidx(drv, if_nametoindex(drv->ifname));
5054
5055         if (hostapd_set_iface_flags(drv, drv->ifname, 0))
5056                 return -1;
5057
5058         if (bssid) {
5059                 os_strlcpy(ifr.ifr_name, drv->ifname, IFNAMSIZ);
5060                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
5061                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
5062
5063                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
5064                         perror("ioctl(SIOCSIFHWADDR)");
5065                         return -1;
5066                 }
5067         }
5068
5069         /*
5070          * initialise generic netlink and nl80211
5071          */
5072         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
5073         if (!drv->nl_cb) {
5074                 printf("Failed to allocate netlink callbacks.\n");
5075                 return -1;
5076         }
5077
5078         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
5079         if (!drv->nl_handle) {
5080                 printf("Failed to allocate netlink handle.\n");
5081                 return -1;
5082         }
5083
5084         if (genl_connect(drv->nl_handle)) {
5085                 printf("Failed to connect to generic netlink.\n");
5086                 return -1;
5087         }
5088
5089 #ifdef CONFIG_LIBNL20
5090         if (genl_ctrl_alloc_cache(drv->nl_handle, &drv->nl_cache) < 0) {
5091                 printf("Failed to allocate generic netlink cache.\n");
5092                 return -1;
5093         }
5094 #else /* CONFIG_LIBNL20 */
5095         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
5096         if (!drv->nl_cache) {
5097                 printf("Failed to allocate generic netlink cache.\n");
5098                 return -1;
5099         }
5100 #endif /* CONFIG_LIBNL20 */
5101
5102         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
5103         if (!drv->nl80211) {
5104                 printf("nl80211 not found.\n");
5105                 return -1;
5106         }
5107
5108 #ifdef CONFIG_IEEE80211N
5109         if (drv->ht_40mhz_scan) {
5110                 if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_STATION)
5111                     || hostapd_set_iface_flags(drv, drv->ifname, 1) ||
5112                     i802_ht_scan(drv) ||
5113                     hostapd_set_iface_flags(drv, drv->ifname, 0)) {
5114                         wpa_printf(MSG_ERROR, "Failed to scan channels for "
5115                                    "HT 40 MHz operations");
5116                         return -1;
5117                 }
5118         }
5119 #endif /* CONFIG_IEEE80211N */
5120
5121         /* Initialise a monitor interface */
5122         if (nl80211_create_monitor_interface(drv))
5123                 return -1;
5124
5125         if (nl80211_set_mode(drv, drv->ifname, NL80211_IFTYPE_AP))
5126                 goto fail1;
5127
5128         if (hostapd_set_iface_flags(drv, drv->ifname, 1))
5129                 goto fail1;
5130
5131         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
5132         if (drv->eapol_sock < 0) {
5133                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
5134                 goto fail1;
5135         }
5136
5137         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
5138         {
5139                 printf("Could not register read socket for eapol\n");
5140                 return -1;
5141         }
5142
5143         memset(&ifr, 0, sizeof(ifr));
5144         os_strlcpy(ifr.ifr_name, drv->ifname, sizeof(ifr.ifr_name));
5145         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
5146                 perror("ioctl(SIOCGIFHWADDR)");
5147                 goto fail1;
5148         }
5149
5150         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
5151                 printf("Invalid HW-addr family 0x%04x\n",
5152                        ifr.ifr_hwaddr.sa_family);
5153                 goto fail1;
5154         }
5155         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
5156
5157         return 0;
5158
5159 fail1:
5160         nl80211_remove_iface(drv, drv->monitor_ifidx);
5161         return -1;
5162 }
5163
5164
5165 static int i802_get_inact_sec(void *priv, const u8 *addr)
5166 {
5167         struct hostap_sta_driver_data data;
5168         int ret;
5169
5170         data.inactive_msec = (unsigned long) -1;
5171         ret = i802_read_sta_data(priv, &data, addr);
5172         if (ret || data.inactive_msec == (unsigned long) -1)
5173                 return -1;
5174         return data.inactive_msec / 1000;
5175 }
5176
5177
5178 static int i802_sta_clear_stats(void *priv, const u8 *addr)
5179 {
5180 #if 0
5181         /* TODO */
5182 #endif
5183         return 0;
5184 }
5185
5186
5187 static void
5188 hostapd_wireless_event_wireless_custom(struct wpa_driver_nl80211_data *drv,
5189                                        char *custom)
5190 {
5191         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
5192
5193         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
5194                 char *pos;
5195                 u8 addr[ETH_ALEN];
5196                 pos = strstr(custom, "addr=");
5197                 if (pos == NULL) {
5198                         wpa_printf(MSG_DEBUG,
5199                                    "MLME-MICHAELMICFAILURE.indication "
5200                                    "without sender address ignored");
5201                         return;
5202                 }
5203                 pos += 5;
5204                 if (hwaddr_aton(pos, addr) == 0) {
5205                         hostapd_michael_mic_failure(drv->hapd, addr);
5206                 } else {
5207                         wpa_printf(MSG_DEBUG,
5208                                    "MLME-MICHAELMICFAILURE.indication "
5209                                    "with invalid MAC address");
5210                 }
5211         }
5212 }
5213
5214
5215 static void hostapd_wireless_event_wireless(struct wpa_driver_nl80211_data *drv,
5216                                             char *data, int len)
5217 {
5218         struct iw_event iwe_buf, *iwe = &iwe_buf;
5219         char *pos, *end, *custom, *buf;
5220
5221         pos = data;
5222         end = data + len;
5223
5224         while (pos + IW_EV_LCP_LEN <= end) {
5225                 /* Event data may be unaligned, so make a local, aligned copy
5226                  * before processing. */
5227                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
5228                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
5229                            iwe->cmd, iwe->len);
5230                 if (iwe->len <= IW_EV_LCP_LEN)
5231                         return;
5232
5233                 custom = pos + IW_EV_POINT_LEN;
5234                 if (drv->we_version > 18 &&
5235                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
5236                      iwe->cmd == IWEVCUSTOM)) {
5237                         /* WE-19 removed the pointer from struct iw_point */
5238                         char *dpos = (char *) &iwe_buf.u.data.length;
5239                         int dlen = dpos - (char *) &iwe_buf;
5240                         memcpy(dpos, pos + IW_EV_LCP_LEN,
5241                                sizeof(struct iw_event) - dlen);
5242                 } else {
5243                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
5244                         custom += IW_EV_POINT_OFF;
5245                 }
5246
5247                 switch (iwe->cmd) {
5248                 case IWEVCUSTOM:
5249                         if (custom + iwe->u.data.length > end)
5250                                 return;
5251                         buf = malloc(iwe->u.data.length + 1);
5252                         if (buf == NULL)
5253                                 return;
5254                         memcpy(buf, custom, iwe->u.data.length);
5255                         buf[iwe->u.data.length] = '\0';
5256                         hostapd_wireless_event_wireless_custom(drv, buf);
5257                         free(buf);
5258                         break;
5259                 }
5260
5261                 pos += iwe->len;
5262         }
5263 }
5264
5265
5266 static void hostapd_wireless_event_rtm_newlink(struct wpa_driver_nl80211_data *drv,
5267                                                struct nlmsghdr *h, int len)
5268 {
5269         struct ifinfomsg *ifi;
5270         int attrlen, _nlmsg_len, rta_len;
5271         struct rtattr *attr;
5272
5273         if (len < (int) sizeof(*ifi))
5274                 return;
5275
5276         ifi = NLMSG_DATA(h);
5277
5278         /* TODO: use ifi->ifi_index to filter out wireless events from other
5279          * interfaces */
5280
5281         _nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
5282
5283         attrlen = h->nlmsg_len - _nlmsg_len;
5284         if (attrlen < 0)
5285                 return;
5286
5287         attr = (struct rtattr *) (((char *) ifi) + _nlmsg_len);
5288
5289         rta_len = RTA_ALIGN(sizeof(struct rtattr));
5290         while (RTA_OK(attr, attrlen)) {
5291                 if (attr->rta_type == IFLA_WIRELESS) {
5292                         hostapd_wireless_event_wireless(
5293                                 drv, ((char *) attr) + rta_len,
5294                                 attr->rta_len - rta_len);
5295                 }
5296                 attr = RTA_NEXT(attr, attrlen);
5297         }
5298 }
5299
5300
5301 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
5302                                            void *sock_ctx)
5303 {
5304         char buf[256];
5305         int left;
5306         struct sockaddr_nl from;
5307         socklen_t fromlen;
5308         struct nlmsghdr *h;
5309         struct wpa_driver_nl80211_data *drv = eloop_ctx;
5310
5311         fromlen = sizeof(from);
5312         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
5313                         (struct sockaddr *) &from, &fromlen);
5314         if (left < 0) {
5315                 if (errno != EINTR && errno != EAGAIN)
5316                         perror("recvfrom(netlink)");
5317                 return;
5318         }
5319
5320         h = (struct nlmsghdr *) buf;
5321         while (left >= (int) sizeof(*h)) {
5322                 int len, plen;
5323
5324                 len = h->nlmsg_len;
5325                 plen = len - sizeof(*h);
5326                 if (len > left || plen < 0) {
5327                         printf("Malformed netlink message: "
5328                                "len=%d left=%d plen=%d\n",
5329                                len, left, plen);
5330                         break;
5331                 }
5332
5333                 switch (h->nlmsg_type) {
5334                 case RTM_NEWLINK:
5335                         hostapd_wireless_event_rtm_newlink(drv, h, plen);
5336                         break;
5337                 }
5338
5339                 len = NLMSG_ALIGN(len);
5340                 left -= len;
5341                 h = (struct nlmsghdr *) ((char *) h + len);
5342         }
5343
5344         if (left > 0) {
5345                 printf("%d extra bytes in the end of netlink message\n", left);
5346         }
5347 }
5348
5349
5350 static int hostap_get_we_version(struct wpa_driver_nl80211_data *drv)
5351 {
5352         struct iw_range *range;
5353         struct iwreq iwr;
5354         int minlen;
5355         size_t buflen;
5356
5357         drv->we_version = 0;
5358
5359         /*
5360          * Use larger buffer than struct iw_range in order to allow the
5361          * structure to grow in the future.
5362          */
5363         buflen = sizeof(struct iw_range) + 500;
5364         range = os_zalloc(buflen);
5365         if (range == NULL)
5366                 return -1;
5367
5368         memset(&iwr, 0, sizeof(iwr));
5369         os_strlcpy(iwr.ifr_name, drv->ifname, IFNAMSIZ);
5370         iwr.u.data.pointer = (caddr_t) range;
5371         iwr.u.data.length = buflen;
5372
5373         minlen = ((char *) &range->enc_capa) - (char *) range +
5374                 sizeof(range->enc_capa);
5375
5376         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
5377                 perror("ioctl[SIOCGIWRANGE]");
5378                 free(range);
5379                 return -1;
5380         } else if (iwr.u.data.length >= minlen &&
5381                    range->we_version_compiled >= 18) {
5382                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
5383                            "WE(source)=%d enc_capa=0x%x",
5384                            range->we_version_compiled,
5385                            range->we_version_source,
5386                            range->enc_capa);
5387                 drv->we_version = range->we_version_compiled;
5388         }
5389
5390         free(range);
5391         return 0;
5392 }
5393
5394
5395 static int i802_wireless_event_init(struct wpa_driver_nl80211_data *drv)
5396 {
5397         int s;
5398         struct sockaddr_nl local;
5399
5400         hostap_get_we_version(drv);
5401
5402         drv->wext_sock = -1;
5403
5404         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
5405         if (s < 0) {
5406                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
5407                 return -1;
5408         }
5409
5410         memset(&local, 0, sizeof(local));
5411         local.nl_family = AF_NETLINK;
5412         local.nl_groups = RTMGRP_LINK;
5413         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
5414                 perror("bind(netlink)");
5415                 close(s);
5416                 return -1;
5417         }
5418
5419         eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
5420                                  NULL);
5421         drv->wext_sock = s;
5422
5423         return 0;
5424 }
5425
5426
5427 static void i802_wireless_event_deinit(struct wpa_driver_nl80211_data *drv)
5428 {
5429         if (drv->wext_sock < 0)
5430                 return;
5431         eloop_unregister_read_sock(drv->wext_sock);
5432         close(drv->wext_sock);
5433 }
5434
5435
5436 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
5437 {
5438         struct wpa_driver_nl80211_data *drv = priv;
5439         struct ieee80211_mgmt mgmt;
5440
5441         memset(&mgmt, 0, sizeof(mgmt));
5442         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
5443                                           WLAN_FC_STYPE_DEAUTH);
5444         memcpy(mgmt.da, addr, ETH_ALEN);
5445         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
5446         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
5447         mgmt.u.deauth.reason_code = host_to_le16(reason);
5448         return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
5449                                       sizeof(mgmt.u.deauth), 0);
5450 }
5451
5452
5453 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
5454 {
5455         struct wpa_driver_nl80211_data *drv = priv;
5456         struct ieee80211_mgmt mgmt;
5457
5458         memset(&mgmt, 0, sizeof(mgmt));
5459         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
5460                                           WLAN_FC_STYPE_DISASSOC);
5461         memcpy(mgmt.da, addr, ETH_ALEN);
5462         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
5463         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
5464         mgmt.u.disassoc.reason_code = host_to_le16(reason);
5465         return  i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
5466                                        sizeof(mgmt.u.disassoc), 0);
5467 }
5468
5469
5470 static const struct hostapd_neighbor_bss *
5471 i802_get_neighbor_bss(void *priv, size_t *num)
5472 {
5473         struct wpa_driver_nl80211_data *drv = priv;
5474         *num = drv->num_neighbors;
5475         return drv->neighbors;
5476 }
5477
5478
5479 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
5480 {
5481         struct wpa_driver_nl80211_data *drv;
5482         size_t i;
5483
5484         drv = os_zalloc(sizeof(struct wpa_driver_nl80211_data));
5485         if (drv == NULL) {
5486                 printf("Could not allocate memory for i802 driver data\n");
5487                 return NULL;
5488         }
5489
5490         drv->hapd = hapd;
5491         memcpy(drv->ifname, hapd->conf->iface, sizeof(drv->ifname));
5492         memcpy(drv->bss.ifname, hapd->conf->iface, sizeof(drv->bss.ifname));
5493
5494         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
5495         drv->if_indices = drv->default_if_indices;
5496         for (i = 0; i < hapd->iface->num_bss; i++) {
5497                 struct hostapd_data *bss = hapd->iface->bss[i];
5498                 if (bss->conf->bridge)
5499                         add_ifidx(drv, if_nametoindex(bss->conf->bridge));
5500         }
5501         drv->ht_40mhz_scan = hapd->iconf->secondary_channel != 0;
5502
5503         if (i802_init_sockets(drv, bssid))
5504                 goto failed;
5505
5506         if (i802_wireless_event_init(drv))
5507                 goto failed;
5508
5509         return drv;
5510
5511 failed:
5512         free(drv);
5513         return NULL;
5514 }
5515
5516
5517 static void *i802_init(struct hostapd_data *hapd)
5518 {
5519         return i802_init_bssid(hapd, NULL);
5520 }
5521
5522
5523 static void i802_deinit(void *priv)
5524 {
5525         struct wpa_driver_nl80211_data *drv = priv;
5526         struct i802_bss *bss, *prev;
5527
5528         i802_wireless_event_deinit(drv);
5529
5530         if (drv->last_freq_ht) {
5531                 /* Clear HT flags from the driver */
5532                 struct hostapd_freq_params freq;
5533                 os_memset(&freq, 0, sizeof(freq));
5534                 freq.freq = drv->last_freq;
5535                 i802_set_freq(priv, &freq);
5536         }
5537
5538         i802_del_beacon(drv);
5539
5540         /* remove monitor interface */
5541         nl80211_remove_iface(drv, drv->monitor_ifidx);
5542
5543         (void) hostapd_set_iface_flags(drv, drv->ifname, 0);
5544
5545         if (drv->monitor_sock >= 0) {
5546                 eloop_unregister_read_sock(drv->monitor_sock);
5547                 close(drv->monitor_sock);
5548         }
5549         if (drv->ioctl_sock >= 0)
5550                 close(drv->ioctl_sock);
5551         if (drv->eapol_sock >= 0) {
5552                 eloop_unregister_read_sock(drv->eapol_sock);
5553                 close(drv->eapol_sock);
5554         }
5555
5556         genl_family_put(drv->nl80211);
5557         nl_cache_free(drv->nl_cache);
5558         nl_handle_destroy(drv->nl_handle);
5559         nl_cb_put(drv->nl_cb);
5560
5561         if (drv->if_indices != drv->default_if_indices)
5562                 free(drv->if_indices);
5563
5564         os_free(drv->neighbors);
5565
5566         bss = drv->bss.next;
5567         while (bss) {
5568                 prev = bss;
5569                 bss = bss->next;
5570                 os_free(bss);
5571         }
5572
5573         free(drv);
5574 }
5575
5576 #endif /* HOSTAPD */
5577
5578
5579 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
5580         .name = "nl80211",
5581         .desc = "Linux nl80211/cfg80211",
5582         .get_bssid = wpa_driver_nl80211_get_bssid,
5583         .get_ssid = wpa_driver_nl80211_get_ssid,
5584         .set_key = wpa_driver_nl80211_set_key,
5585         .scan2 = wpa_driver_nl80211_scan,
5586         .get_scan_results2 = wpa_driver_nl80211_get_scan_results,
5587         .deauthenticate = wpa_driver_nl80211_deauthenticate,
5588         .disassociate = wpa_driver_nl80211_disassociate,
5589         .authenticate = wpa_driver_nl80211_authenticate,
5590         .associate = wpa_driver_nl80211_associate,
5591         .init = wpa_driver_nl80211_init,
5592         .deinit = wpa_driver_nl80211_deinit,
5593         .get_capa = wpa_driver_nl80211_get_capa,
5594         .set_operstate = wpa_driver_nl80211_set_operstate,
5595         .set_country = wpa_driver_nl80211_set_country,
5596 #ifdef CONFIG_AP
5597         .set_beacon = wpa_driver_nl80211_set_beacon,
5598         .set_beacon_int = wpa_driver_nl80211_set_beacon_int,
5599         .send_mlme = wpa_driver_nl80211_send_mlme,
5600         .get_hw_feature_data = wpa_driver_nl80211_get_hw_feature_data,
5601 #endif /* CONFIG_AP */
5602 #ifdef HOSTAPD
5603         .hapd_init = i802_init,
5604         .init_bssid = i802_init_bssid,
5605         .hapd_deinit = i802_deinit,
5606         .hapd_set_key = i802_set_key,
5607         .get_seqnum = i802_get_seqnum,
5608         .flush = i802_flush,
5609         .read_sta_data = i802_read_sta_data,
5610         .hapd_send_eapol = i802_send_eapol,
5611         .sta_set_flags = i802_sta_set_flags,
5612         .sta_deauth = i802_sta_deauth,
5613         .sta_disassoc = i802_sta_disassoc,
5614         .sta_remove = i802_sta_remove,
5615         .send_mgmt_frame = i802_send_mgmt_frame,
5616         .sta_add = i802_sta_add,
5617         .get_inact_sec = i802_get_inact_sec,
5618         .sta_clear_stats = i802_sta_clear_stats,
5619         .set_freq = i802_set_freq,
5620         .set_rts = i802_set_rts,
5621         .set_frag = i802_set_frag,
5622         .set_retry = i802_set_retry,
5623         .set_rate_sets = i802_set_rate_sets,
5624         .hapd_set_beacon = i802_set_beacon,
5625         .hapd_set_beacon_int = i802_set_beacon_int,
5626         .set_cts_protect = i802_set_cts_protect,
5627         .set_preamble = i802_set_preamble,
5628         .set_short_slot_time = i802_set_short_slot_time,
5629         .set_tx_queue_params = i802_set_tx_queue_params,
5630         .bss_add = i802_bss_add,
5631         .bss_remove = i802_bss_remove,
5632         .if_add = i802_if_add,
5633         .if_update = i802_if_update,
5634         .if_remove = i802_if_remove,
5635         .hapd_get_hw_feature_data = i802_get_hw_feature_data,
5636         .set_sta_vlan = i802_set_sta_vlan,
5637         .hapd_set_country = i802_set_country,
5638         .get_neighbor_bss = i802_get_neighbor_bss,
5639 #endif /* HOSTAPD */
5640 };