hostapd/driver_nl80211.c

   1 /*
   2  * hostapd / Kernel driver communication via nl80211
   3  * Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * Alternatively, this software may be distributed under the terms of BSD
  13  * license.
  14  *
  15  * See README and COPYING for more details.
  16  */
  17
  18 #include "includes.h"
  19
  20 #include <sys/ioctl.h>
  21 #include <netlink/genl/genl.h>
  22 #include <netlink/genl/family.h>
  23 #include <netlink/genl/ctrl.h>
  24 #include <netlink/msg.h>
  25 #include <netlink/attr.h>
  26 #include <linux/nl80211.h>
  27 #include <net/if.h>
  28 #include <linux/if_packet.h>
  29 #include <linux/if_ether.h>   /* The L2 protocols */
  30 #include "wireless_copy.h"
  31 #include <net/if_arp.h>
  32
  33 #include "hostapd.h"
  34 #include "driver.h"
  35 #include "ieee802_1x.h"
  36 #include "eloop.h"
  37 #include "ieee802_11.h"
  38 #include "sta_info.h"
  39 #include "hw_features.h"
  40 #include "mlme.h"
  41 #include "radiotap.h"
  42 #include "radiotap_iter.h"
  43
  44 enum ieee80211_msg_type {
  45         ieee80211_msg_normal = 0,
  46         ieee80211_msg_tx_callback_ack = 1,
  47         ieee80211_msg_tx_callback_fail = 2,
  48 };
  49
  50 struct i802_driver_data {
  51         struct hostapd_data *hapd;
  52
  53         char iface[IFNAMSIZ + 1];
  54         int bridge;
  55         int ioctl_sock; /* socket for ioctl() use */
  56         int wext_sock; /* socket for wireless events */
  57         int eapol_sock; /* socket for EAPOL frames */
  58         int monitor_sock; /* socket for monitor */
  59         int monitor_ifidx;
  60
  61         int default_if_indices[16];
  62         int *if_indices;
  63         int num_if_indices;
  64
  65         int we_version;
  66         struct nl_handle *nl_handle;
  67         struct nl_cache *nl_cache;
  68         struct nl_cb *nl_cb;
  69         struct genl_family *nl80211;
  70         int dtim_period, beacon_int;
  71         unsigned int beacon_set:1;
  72         unsigned int ieee802_1x_active:1;
  73 };
  74
  75
  76 static void add_ifidx(struct i802_driver_data *drv, int ifidx)
  77 {
  78         int i;
  79         int *old;
  80
  81         for (i = 0; i < drv->num_if_indices; i++) {
  82                 if (drv->if_indices[i] == 0) {
  83                         drv->if_indices[i] = ifidx;
  84                         return;
  85                 }
  86         }
  87
  88         if (drv->if_indices != drv->default_if_indices)
  89                 old = drv->if_indices;
  90         else
  91                 old = NULL;
  92
  93         drv->if_indices = realloc(old,
  94                                   sizeof(int) * (drv->num_if_indices + 1));
  95         if (!drv->if_indices) {
  96                 if (!old)
  97                         drv->if_indices = drv->default_if_indices;
  98                 else
  99                         drv->if_indices = old;
 100                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
 101                            "interfaces");
 102                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
 103                 return;
 104         }
 105         drv->if_indices[drv->num_if_indices] = ifidx;
 106         drv->num_if_indices++;
 107 }
 108
 109
 110 static void del_ifidx(struct i802_driver_data *drv, int ifidx)
 111 {
 112         int i;
 113
 114         for (i = 0; i < drv->num_if_indices; i++) {
 115                 if (drv->if_indices[i] == ifidx) {
 116                         drv->if_indices[i] = 0;
 117                         break;
 118                 }
 119         }
 120 }
 121
 122
 123 static int have_ifidx(struct i802_driver_data *drv, int ifidx)
 124 {
 125         int i;
 126
 127         if (ifidx == drv->bridge)
 128                 return 1;
 129
 130         for (i = 0; i < drv->num_if_indices; i++)
 131                 if (drv->if_indices[i] == ifidx)
 132                         return 1;
 133
 134         return 0;
 135 }
 136
 137
 138 /* helper for netlink get routines */
 139 static int ack_wait_handler(struct nl_msg *msg, void *arg)
 140 {
 141         int *finished = arg;
 142
 143         *finished = 1;
 144         return NL_STOP;
 145 }
 146
 147
 148 static int hostapd_set_iface_flags(struct i802_driver_data *drv,
 149                                    const char *ifname, int dev_up)
 150 {
 151         struct ifreq ifr;
 152
 153         if (drv->ioctl_sock < 0)
 154                 return -1;
 155
 156         memset(&ifr, 0, sizeof(ifr));
 157         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 158
 159         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 160                 perror("ioctl[SIOCGIFFLAGS]");
 161                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 162                            drv->iface);
 163                 return -1;
 164         }
 165
 166         if (dev_up)
 167                 ifr.ifr_flags |= IFF_UP;
 168         else
 169                 ifr.ifr_flags &= ~IFF_UP;
 170
 171         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 172                 perror("ioctl[SIOCSIFFLAGS]");
 173                 return -1;
 174         }
 175
 176         return 0;
 177 }
 178
 179
 180 static int nl_set_encr(int ifindex, struct i802_driver_data *drv,
 181                        const char *alg, const u8 *addr, int idx, const u8 *key,
 182                        size_t key_len, int txkey)
 183 {
 184         struct nl_msg *msg;
 185         int ret = -1;
 186         int err = 0;
 187
 188         msg = nlmsg_alloc();
 189         if (!msg)
 190                 goto out;
 191
 192         if (strcmp(alg, "none") == 0) {
 193                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 194                             0, NL80211_CMD_DEL_KEY, 0);
 195         } else {
 196                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 197                             0, NL80211_CMD_NEW_KEY, 0);
 198                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
 199                 if (strcmp(alg, "WEP") == 0) {
 200                         if (key_len == 5)
 201                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
 202                                             0x000FAC01);
 203                         else
 204                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
 205                                             0x000FAC05);
 206                 } else if (strcmp(alg, "TKIP") == 0)
 207                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
 208                 else if (strcmp(alg, "CCMP") == 0)
 209                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
 210                 else if (strcmp(alg, "IGTK") == 0)
 211                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
 212                 else {
 213                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
 214                                    "algorithm '%s'", __func__, alg);
 215                         goto out;
 216                 }
 217         }
 218
 219         if (addr)
 220                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 221         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 222         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
 223
 224         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 225             (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
 226                 if (err != -ENOENT) {
 227                         ret = 0;
 228                         goto out;
 229                 }
 230         }
 231
 232         /*
 233          * If we need to set the default TX key we do that below,
 234          * otherwise we're done here.
 235          */
 236         if (!txkey || addr) {
 237                 ret = 0;
 238                 goto out;
 239         }
 240
 241         nlmsg_free(msg);
 242
 243         msg = nlmsg_alloc();
 244         if (!msg)
 245                 goto out;
 246
 247         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 248                     0, NL80211_CMD_SET_KEY, 0);
 249         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 250         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
 251 #ifdef NL80211_MFP_PENDING
 252         if (strcmp(alg, "IGTK") == 0)
 253                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
 254         else
 255                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
 256 #else /* NL80211_MFP_PENDING */
 257         NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
 258 #endif /* NL80211_MFP_PENDING */
 259
 260         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 261             (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
 262                 if (err != -ENOENT) {
 263                         ret = 0;
 264                         goto out;
 265                 }
 266         }
 267
 268         ret = 0;
 269
 270  out:
 271  nla_put_failure:
 272         nlmsg_free(msg);
 273         return ret;
 274 }
 275
 276
 277 static int i802_set_encryption(const char *iface, void *priv, const char *alg,
 278                                const u8 *addr, int idx, const u8 *key,
 279                                size_t key_len, int txkey)
 280 {
 281         struct i802_driver_data *drv = priv;
 282         int ret;
 283
 284         ret = nl_set_encr(if_nametoindex(iface), drv, alg, addr, idx, key,
 285                           key_len, txkey);
 286         if (ret < 0)
 287                 return ret;
 288
 289         if (strcmp(alg, "IGTK") == 0) {
 290                 ret = nl_set_encr(drv->monitor_ifidx, drv, alg, addr, idx, key,
 291                                   key_len, txkey);
 292         }
 293
 294         return ret;
 295 }
 296
 297
 298 static inline int min_int(int a, int b)
 299 {
 300         if (a < b)
 301                 return a;
 302         return b;
 303 }
 304
 305
 306 static int get_key_handler(struct nl_msg *msg, void *arg)
 307 {
 308         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 309         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 310
 311         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 312                   genlmsg_attrlen(gnlh, 0), NULL);
 313
 314         /*
 315          * TODO: validate the key index and mac address!
 316          * Otherwise, there's a race condition as soon as
 317          * the kernel starts sending key notifications.
 318          */
 319
 320         if (tb[NL80211_ATTR_KEY_SEQ])
 321                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 322                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
 323         return NL_SKIP;
 324 }
 325
 326
 327 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
 328                            int idx, u8 *seq)
 329 {
 330         struct i802_driver_data *drv = priv;
 331         struct nl_msg *msg;
 332         struct nl_cb *cb = NULL;
 333         int ret = -1;
 334         int err = 0;
 335         int finished = 0;
 336
 337         msg = nlmsg_alloc();
 338         if (!msg)
 339                 goto out;
 340
 341         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 342                     0, NL80211_CMD_GET_KEY, 0);
 343
 344         if (addr)
 345                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 346         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 347         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
 348
 349         cb = nl_cb_clone(drv->nl_cb);
 350         if (!cb)
 351                 goto out;
 352
 353         memset(seq, 0, 6);
 354
 355         if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
 356                 goto out;
 357
 358         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, get_key_handler, seq);
 359         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
 360
 361         err = nl_recvmsgs(drv->nl_handle, cb);
 362
 363         if (!finished)
 364                 err = nl_wait_for_ack(drv->nl_handle);
 365
 366         if (err < 0)
 367                 goto out;
 368
 369         ret = 0;
 370
 371  out:
 372         nl_cb_put(cb);
 373  nla_put_failure:
 374         nlmsg_free(msg);
 375         return ret;
 376 }
 377
 378
 379 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
 380                               int mode)
 381 {
 382         return -1;
 383 }
 384
 385
 386 static int i802_set_ssid(const char *ifname, void *priv, const u8 *buf,
 387                          int len)
 388 {
 389         struct i802_driver_data *drv = priv;
 390         struct iwreq iwr;
 391
 392         memset(&iwr, 0, sizeof(iwr));
 393         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
 394         iwr.u.essid.flags = 1; /* SSID active */
 395         iwr.u.essid.pointer = (caddr_t) buf;
 396         iwr.u.essid.length = len;
 397
 398         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 399                 perror("ioctl[SIOCSIWESSID]");
 400                 printf("len=%d\n", len);
 401                 return -1;
 402         }
 403
 404         return 0;
 405 }
 406
 407
 408 static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
 409                                 int flags)
 410 {
 411         struct ieee80211_hdr *hdr = (void*) data;
 412         __u8 rtap_hdr[] = {
 413                 0x00, 0x00, /* radiotap version */
 414                 0x0e, 0x00, /* radiotap length */
 415                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
 416                 0x0c,       /* F_WEP | F_FRAG (encrypt/fragment if required) */
 417                 0x00,       /* padding */
 418                 0x00, 0x00, /* RX and TX flags to indicate that */
 419                 0x00, 0x00, /* this is the injected frame directly */
 420         };
 421         struct i802_driver_data *drv = priv;
 422         struct iovec iov[2] = {
 423                 {
 424                         .iov_base = &rtap_hdr,
 425                         .iov_len = sizeof(rtap_hdr),
 426                 },
 427                 {
 428                         .iov_base = (void*)data,
 429                         .iov_len = len,
 430                 }
 431         };
 432         struct msghdr msg = {
 433                 .msg_name = NULL,
 434                 .msg_namelen = 0,
 435                 .msg_iov = iov,
 436                 .msg_iovlen = 2,
 437                 .msg_control = NULL,
 438                 .msg_controllen = 0,
 439                 .msg_flags = 0,
 440         };
 441
 442         /*
 443          * ugh, guess what, the generic code sets one of the version
 444          * bits to request tx callback
 445          */
 446         hdr->frame_control &= ~host_to_le16(BIT(1));
 447         return sendmsg(drv->monitor_sock, &msg, flags);
 448 }
 449
 450
 451 /* Set kernel driver on given frequency (MHz) */
 452 static int i802_set_freq(void *priv, int mode, int freq)
 453 {
 454         struct i802_driver_data *drv = priv;
 455         struct iwreq iwr;
 456
 457         memset(&iwr, 0, sizeof(iwr));
 458         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 459         iwr.u.freq.m = freq;
 460         iwr.u.freq.e = 6;
 461
 462         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 463                 perror("ioctl[SIOCSIWFREQ]");
 464                 return -1;
 465         }
 466
 467         return 0;
 468 }
 469
 470
 471 static int i802_set_rts(void *priv, int rts)
 472 {
 473         struct i802_driver_data *drv = priv;
 474         struct iwreq iwr;
 475
 476         memset(&iwr, 0, sizeof(iwr));
 477         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 478         iwr.u.rts.value = rts;
 479         iwr.u.rts.fixed = 1;
 480
 481         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
 482                 perror("ioctl[SIOCSIWRTS]");
 483                 return -1;
 484         }
 485
 486         return 0;
 487 }
 488
 489
 490 static int i802_get_rts(void *priv, int *rts)
 491 {
 492         struct i802_driver_data *drv = priv;
 493         struct iwreq iwr;
 494
 495         memset(&iwr, 0, sizeof(iwr));
 496         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 497
 498         if (ioctl(drv->ioctl_sock, SIOCGIWRTS, &iwr) < 0) {
 499                 perror("ioctl[SIOCGIWRTS]");
 500                 return -1;
 501         }
 502
 503         *rts = iwr.u.rts.value;
 504
 505         return 0;
 506 }
 507
 508
 509 static int i802_set_frag(void *priv, int frag)
 510 {
 511         struct i802_driver_data *drv = priv;
 512         struct iwreq iwr;
 513
 514         memset(&iwr, 0, sizeof(iwr));
 515         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 516         iwr.u.frag.value = frag;
 517         iwr.u.frag.fixed = 1;
 518
 519         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 520                 perror("ioctl[SIOCSIWFRAG]");
 521                 return -1;
 522         }
 523
 524         return 0;
 525 }
 526
 527
 528 static int i802_get_frag(void *priv, int *frag)
 529 {
 530         struct i802_driver_data *drv = priv;
 531         struct iwreq iwr;
 532
 533         memset(&iwr, 0, sizeof(iwr));
 534         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 535
 536         if (ioctl(drv->ioctl_sock, SIOCGIWFRAG, &iwr) < 0) {
 537                 perror("ioctl[SIOCGIWFRAG]");
 538                 return -1;
 539         }
 540
 541         *frag = iwr.u.frag.value;
 542
 543         return 0;
 544 }
 545
 546
 547 static int i802_set_retry(void *priv, int short_retry, int long_retry)
 548 {
 549         struct i802_driver_data *drv = priv;
 550         struct iwreq iwr;
 551
 552         memset(&iwr, 0, sizeof(iwr));
 553         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 554
 555         iwr.u.retry.value = short_retry;
 556         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 557         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 558                 perror("ioctl[SIOCSIWRETRY(short)]");
 559                 return -1;
 560         }
 561
 562         iwr.u.retry.value = long_retry;
 563         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 564         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 565                 perror("ioctl[SIOCSIWRETRY(long)]");
 566                 return -1;
 567         }
 568
 569         return 0;
 570 }
 571
 572
 573 static int i802_get_retry(void *priv, int *short_retry, int *long_retry)
 574 {
 575         struct i802_driver_data *drv = priv;
 576         struct iwreq iwr;
 577
 578         memset(&iwr, 0, sizeof(iwr));
 579         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 580
 581         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 582         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 583                 perror("ioctl[SIOCGIWFRAG(short)]");
 584                 return -1;
 585         }
 586         *short_retry = iwr.u.retry.value;
 587
 588         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 589         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 590                 perror("ioctl[SIOCGIWFRAG(long)]");
 591                 return -1;
 592         }
 593         *long_retry = iwr.u.retry.value;
 594
 595         return 0;
 596 }
 597
 598
 599 static int i802_flush(void *priv)
 600 {
 601         struct i802_driver_data *drv = priv;
 602         struct nl_msg *msg;
 603         int ret = -1;
 604
 605         msg = nlmsg_alloc();
 606         if (!msg)
 607                 goto out;
 608
 609         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 610                     0, NL80211_CMD_DEL_STATION, 0);
 611
 612         /*
 613          * XXX: FIX! this needs to flush all VLANs too
 614          */
 615         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 616                     if_nametoindex(drv->iface));
 617
 618         ret = 0;
 619
 620         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 621             nl_wait_for_ack(drv->nl_handle) < 0) {
 622                 ret = -1;
 623         }
 624
 625  nla_put_failure:
 626         nlmsg_free(msg);
 627
 628  out:
 629         return ret;
 630 }
 631
 632
 633 static int get_sta_handler(struct nl_msg *msg, void *arg)
 634 {
 635         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 636         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 637         struct hostap_sta_driver_data *data = arg;
 638         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
 639         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 640                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
 641                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
 642                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
 643         };
 644
 645         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 646                   genlmsg_attrlen(gnlh, 0), NULL);
 647
 648         /*
 649          * TODO: validate the interface and mac address!
 650          * Otherwise, there's a race condition as soon as
 651          * the kernel starts sending station notifications.
 652          */
 653
 654         if (!tb[NL80211_ATTR_STA_INFO]) {
 655                 wpa_printf(MSG_DEBUG, "sta stats missing!");
 656                 return NL_SKIP;
 657         }
 658         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
 659                              tb[NL80211_ATTR_STA_INFO],
 660                              stats_policy)) {
 661                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
 662                 return NL_SKIP;
 663         }
 664
 665         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
 666                 data->inactive_msec =
 667                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
 668         if (stats[NL80211_STA_INFO_RX_BYTES])
 669                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
 670         if (stats[NL80211_STA_INFO_TX_BYTES])
 671                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
 672
 673         return NL_SKIP;
 674 }
 675
 676 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
 677                               const u8 *addr)
 678 {
 679         struct i802_driver_data *drv = priv;
 680         struct nl_msg *msg;
 681         struct nl_cb *cb = NULL;
 682         int ret = -1;
 683         int err = 0;
 684         int finished = 0;
 685
 686         msg = nlmsg_alloc();
 687         if (!msg)
 688                 goto out;
 689
 690         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 691                     0, NL80211_CMD_GET_STATION, 0);
 692
 693         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 694         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 695
 696         cb = nl_cb_clone(drv->nl_cb);
 697         if (!cb)
 698                 goto out;
 699
 700         if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
 701                 goto out;
 702
 703         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, get_sta_handler, data);
 704         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
 705
 706         err = nl_recvmsgs(drv->nl_handle, cb);
 707
 708         if (!finished)
 709                 err = nl_wait_for_ack(drv->nl_handle);
 710
 711         if (err < 0)
 712                 goto out;
 713
 714         ret = 0;
 715
 716  out:
 717         nl_cb_put(cb);
 718  nla_put_failure:
 719         nlmsg_free(msg);
 720         return ret;
 721
 722 }
 723
 724
 725 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
 726                            size_t data_len, int encrypt, const u8 *own_addr)
 727 {
 728         struct i802_driver_data *drv = priv;
 729         struct ieee80211_hdr *hdr;
 730         size_t len;
 731         u8 *pos;
 732         int res;
 733 #if 0 /* FIX */
 734         int qos = sta->flags & WLAN_STA_WME;
 735 #else
 736         int qos = 0;
 737 #endif
 738
 739         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
 740                 data_len;
 741         hdr = os_zalloc(len);
 742         if (hdr == NULL) {
 743                 printf("malloc() failed for i802_send_data(len=%lu)\n",
 744                        (unsigned long) len);
 745                 return -1;
 746         }
 747
 748         hdr->frame_control =
 749                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 750         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
 751         if (encrypt)
 752                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
 753 #if 0 /* To be enabled if qos determination is added above */
 754         if (qos) {
 755                 hdr->frame_control |=
 756                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
 757         }
 758 #endif
 759
 760         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
 761         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
 762         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
 763         pos = (u8 *) (hdr + 1);
 764
 765 #if 0 /* To be enabled if qos determination is added above */
 766         if (qos) {
 767                 /* add an empty QoS header if needed */
 768                 pos[0] = 0;
 769                 pos[1] = 0;
 770                 pos += 2;
 771         }
 772 #endif
 773
 774         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
 775         pos += sizeof(rfc1042_header);
 776         WPA_PUT_BE16(pos, ETH_P_PAE);
 777         pos += 2;
 778         memcpy(pos, data, data_len);
 779
 780         res = i802_send_mgmt_frame(drv, (u8 *) hdr, len, 0);
 781         free(hdr);
 782
 783         if (res < 0) {
 784                 perror("i802_send_eapol: send");
 785                 printf("i802_send_eapol - packet len: %lu - failed\n",
 786                        (unsigned long) len);
 787         }
 788
 789         return res;
 790 }
 791
 792
 793 static int i802_sta_add(const char *ifname, void *priv, const u8 *addr,
 794                         u16 aid, u16 capability, u8 *supp_rates,
 795                         size_t supp_rates_len, int flags, u16 listen_interval)
 796 {
 797         struct i802_driver_data *drv = priv;
 798         struct nl_msg *msg;
 799         int ret = -1;
 800
 801         msg = nlmsg_alloc();
 802         if (!msg)
 803                 goto out;
 804
 805         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 806                     0, NL80211_CMD_NEW_STATION, 0);
 807
 808         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 809                     if_nametoindex(drv->iface));
 810         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 811         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, aid);
 812         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len,
 813                 supp_rates);
 814         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, listen_interval);
 815
 816         ret = nl_send_auto_complete(drv->nl_handle, msg);
 817         if (ret < 0)
 818                 goto nla_put_failure;
 819
 820         ret = nl_wait_for_ack(drv->nl_handle);
 821         /* ignore EEXIST, this happens if a STA associates while associated */
 822         if (ret == -EEXIST || ret >= 0)
 823                 ret = 0;
 824
 825  nla_put_failure:
 826         nlmsg_free(msg);
 827
 828  out:
 829         return ret;
 830 }
 831
 832
 833 static int i802_sta_remove(void *priv, const u8 *addr)
 834 {
 835         struct i802_driver_data *drv = priv;
 836         struct nl_msg *msg;
 837         int ret = -1;
 838
 839         msg = nlmsg_alloc();
 840         if (!msg)
 841                 goto out;
 842
 843         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 844                     0, NL80211_CMD_DEL_STATION, 0);
 845
 846         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 847                     if_nametoindex(drv->iface));
 848         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 849
 850         ret = 0;
 851
 852         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 853             nl_wait_for_ack(drv->nl_handle) < 0) {
 854                 ret = -1;
 855         }
 856
 857  nla_put_failure:
 858         nlmsg_free(msg);
 859
 860  out:
 861         return ret;
 862 }
 863
 864
 865 static int i802_sta_set_flags(void *priv, const u8 *addr,
 866                               int total_flags, int flags_or, int flags_and)
 867 {
 868         struct i802_driver_data *drv = priv;
 869         struct nl_msg *msg, *flags = NULL;
 870         int ret = -1;
 871
 872         msg = nlmsg_alloc();
 873         if (!msg)
 874                 goto out;
 875
 876         flags = nlmsg_alloc();
 877         if (!flags)
 878                 goto free_msg;
 879
 880         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 881                     0, NL80211_CMD_SET_STATION, 0);
 882
 883         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 884                     if_nametoindex(drv->iface));
 885         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 886
 887         if (total_flags & WLAN_STA_AUTHORIZED || !drv->ieee802_1x_active)
 888                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
 889
 890         if (total_flags & WLAN_STA_WME)
 891                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
 892
 893         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
 894                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
 895
 896 #ifdef NL80211_MFP_PENDING
 897         if (total_flags & WLAN_STA_MFP)
 898                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
 899 #endif /* NL80211_MFP_PENDING */
 900
 901         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
 902                 goto nla_put_failure;
 903
 904         ret = 0;
 905
 906         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 907             nl_wait_for_ack(drv->nl_handle) < 0) {
 908                 ret = -1;
 909         }
 910
 911  nla_put_failure:
 912         nlmsg_free(flags);
 913
 914  free_msg:
 915         nlmsg_free(msg);
 916
 917  out:
 918         return ret;
 919 }
 920
 921
 922 static int i802_set_channel_flag(void *priv, int mode, int chan, int flag,
 923                                  unsigned char power_level,
 924                                  unsigned char antenna_max)
 925 {
 926         return -1;
 927 }
 928
 929
 930 static int i802_set_regulatory_domain(void *priv, unsigned int rd)
 931 {
 932         return -1;
 933 }
 934
 935
 936 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
 937                                     int cw_min, int cw_max, int burst_time)
 938 {
 939         return -1;
 940 }
 941
 942
 943 static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
 944 {
 945         struct nl_msg *msg;
 946
 947         /* stop listening for EAPOL on this interface */
 948         del_ifidx(drv, ifidx);
 949
 950         msg = nlmsg_alloc();
 951         if (!msg)
 952                 goto nla_put_failure;
 953
 954         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 955                     0, NL80211_CMD_DEL_INTERFACE, 0);
 956         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
 957         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 958             nl_wait_for_ack(drv->nl_handle) < 0)
 959         nla_put_failure:
 960                 printf("Failed to remove interface.\n");
 961         nlmsg_free(msg);
 962 }
 963
 964
 965 static int nl80211_create_iface(struct i802_driver_data *drv,
 966                                 const char *ifname,
 967                                 enum nl80211_iftype iftype,
 968                                 const u8 *addr)
 969 {
 970         struct nl_msg *msg, *flags = NULL;
 971         int ifidx;
 972         struct ifreq ifreq;
 973         struct iwreq iwr;
 974
 975         msg = nlmsg_alloc();
 976         if (!msg)
 977                 return -1;
 978
 979         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 980                     0, NL80211_CMD_NEW_INTERFACE, 0);
 981         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 982                     if_nametoindex(drv->hapd->conf->iface));
 983         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
 984         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
 985
 986         if (iftype == NL80211_IFTYPE_MONITOR) {
 987                 int err;
 988
 989                 flags = nlmsg_alloc();
 990                 if (!flags)
 991                         goto nla_put_failure;
 992
 993                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
 994
 995                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
 996
 997                 nlmsg_free(flags);
 998
 999                 if (err)
1000                         goto nla_put_failure;
1001         }
1002
1003         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1004             nl_wait_for_ack(drv->nl_handle) < 0) {
1005  nla_put_failure:
1006                 printf("Failed to create interface %s.\n", ifname);
1007                 nlmsg_free(msg);
1008                 return -1;
1009         }
1010
1011         nlmsg_free(msg);
1012
1013         ifidx = if_nametoindex(ifname);
1014
1015         if (ifidx <= 0)
1016                 return -1;
1017
1018         /* start listening for EAPOL on this interface */
1019         add_ifidx(drv, ifidx);
1020
1021         if (addr) {
1022                 switch (iftype) {
1023                 case NL80211_IFTYPE_AP:
1024                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
1025                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
1026                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1027
1028                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
1029                                 nl80211_remove_iface(drv, ifidx);
1030                                 return -1;
1031                         }
1032                         break;
1033                 case NL80211_IFTYPE_WDS:
1034                         memset(&iwr, 0, sizeof(iwr));
1035                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1036                         iwr.u.addr.sa_family = ARPHRD_ETHER;
1037                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
1038                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
1039                                 return -1;
1040                         break;
1041                 default:
1042                         /* nothing */
1043                         break;
1044                 }
1045         }
1046
1047         return ifidx;
1048 }
1049
1050
1051 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
1052 {
1053         int ifidx;
1054
1055         /*
1056          * The kernel supports that when the low-level driver does,
1057          * but we currently don't because we need per-BSS data that
1058          * currently we can't handle easily.
1059          */
1060         return -1;
1061
1062         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
1063         if (ifidx < 0)
1064                 return -1;
1065         if (hostapd_set_iface_flags(priv, ifname, 1)) {
1066                 nl80211_remove_iface(priv, ifidx);
1067                 return -1;
1068         }
1069         return 0;
1070 }
1071
1072
1073 static int i802_bss_remove(void *priv, const char *ifname)
1074 {
1075         nl80211_remove_iface(priv, if_nametoindex(ifname));
1076         return 0;
1077 }
1078
1079
1080 static int i802_set_beacon(const char *iface, void *priv,
1081                            u8 *head, size_t head_len,
1082                            u8 *tail, size_t tail_len)
1083 {
1084         struct i802_driver_data *drv = priv;
1085         struct nl_msg *msg;
1086         u8 cmd = NL80211_CMD_NEW_BEACON;
1087         int ret = -1;
1088
1089         msg = nlmsg_alloc();
1090         if (!msg)
1091                 goto out;
1092
1093         if (drv->beacon_set)
1094                 cmd = NL80211_CMD_SET_BEACON;
1095
1096         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1097                     0, cmd, 0);
1098         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1099         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1100         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1101         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
1102
1103         if (!drv->dtim_period)
1104                 drv->dtim_period = 2;
1105         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1106
1107         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1108             nl_wait_for_ack(drv->nl_handle) < 0)
1109                 goto out;
1110
1111         ret = 0;
1112
1113         drv->beacon_set = 1;
1114
1115  out:
1116  nla_put_failure:
1117         nlmsg_free(msg);
1118         return ret;
1119 }
1120
1121
1122 static int i802_del_beacon(struct i802_driver_data *drv)
1123 {
1124         struct nl_msg *msg;
1125         int ret = -1;
1126
1127         msg = nlmsg_alloc();
1128         if (!msg)
1129                 goto out;
1130
1131         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1132                     0, NL80211_CMD_DEL_BEACON, 0);
1133         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1134
1135         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1136             nl_wait_for_ack(drv->nl_handle) < 0)
1137                 goto out;
1138
1139         ret = 0;
1140
1141  out:
1142  nla_put_failure:
1143         nlmsg_free(msg);
1144         return ret;
1145 }
1146
1147
1148 static int i802_set_ieee8021x(const char *ifname, void *priv, int enabled)
1149 {
1150         struct i802_driver_data *drv = priv;
1151
1152         /*
1153          * FIXME: This needs to be per interface (BSS)
1154          */
1155         drv->ieee802_1x_active = enabled;
1156         return 0;
1157 }
1158
1159
1160 static int i802_set_privacy(const char *ifname, void *priv, int enabled)
1161 {
1162         struct i802_driver_data *drv = priv;
1163         struct iwreq iwr;
1164
1165         memset(&iwr, 0, sizeof(iwr));
1166
1167         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1168         iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
1169         iwr.u.param.value = enabled;
1170
1171         ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
1172
1173         /* ignore errors, the kernel/driver might not care */
1174         return 0;
1175 }
1176
1177
1178 static int i802_set_internal_bridge(void *priv, int value)
1179 {
1180         return -1;
1181 }
1182
1183
1184 static int i802_set_beacon_int(void *priv, int value)
1185 {
1186         struct i802_driver_data *drv = priv;
1187         struct nl_msg *msg;
1188         int ret = -1;
1189
1190         drv->beacon_int = value;
1191
1192         if (!drv->beacon_set)
1193                 return 0;
1194
1195         msg = nlmsg_alloc();
1196         if (!msg)
1197                 goto out;
1198
1199         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1200                     0, NL80211_CMD_SET_BEACON, 0);
1201         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1202
1203         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
1204
1205         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1206             nl_wait_for_ack(drv->nl_handle) < 0)
1207                 goto out;
1208
1209         ret = 0;
1210
1211  out:
1212  nla_put_failure:
1213         nlmsg_free(msg);
1214         return ret;
1215 }
1216
1217
1218 static int i802_set_dtim_period(const char *iface, void *priv, int value)
1219 {
1220         struct i802_driver_data *drv = priv;
1221         struct nl_msg *msg;
1222         int ret = -1;
1223
1224         msg = nlmsg_alloc();
1225         if (!msg)
1226                 goto out;
1227
1228         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1229                     0, NL80211_CMD_SET_BEACON, 0);
1230         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1231
1232         drv->dtim_period = value;
1233         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1234
1235         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1236             nl_wait_for_ack(drv->nl_handle) < 0)
1237                 goto out;
1238
1239         ret = 0;
1240
1241  out:
1242  nla_put_failure:
1243         nlmsg_free(msg);
1244         return ret;
1245 }
1246
1247
1248 static int i802_set_cts_protect(void *priv, int value)
1249 {
1250         return -1;
1251 }
1252
1253
1254 static int i802_set_preamble(void *priv, int value)
1255 {
1256         return -1;
1257 }
1258
1259
1260 static int i802_set_short_slot_time(void *priv, int value)
1261 {
1262         return -1;
1263 }
1264
1265
1266 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
1267 {
1268         switch (type) {
1269         case HOSTAPD_IF_VLAN:
1270                 return NL80211_IFTYPE_AP_VLAN;
1271         case HOSTAPD_IF_WDS:
1272                 return NL80211_IFTYPE_WDS;
1273         }
1274         return -1;
1275 }
1276
1277
1278 static int i802_if_add(const char *iface, void *priv,
1279                        enum hostapd_driver_if_type type, char *ifname,
1280                        const u8 *addr)
1281 {
1282         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
1283                 return -1;
1284         return 0;
1285 }
1286
1287
1288 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
1289                           char *ifname, const u8 *addr)
1290 {
1291         /* unused at the moment */
1292         return -1;
1293 }
1294
1295
1296 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
1297                           const char *ifname, const u8 *addr)
1298 {
1299         nl80211_remove_iface(priv, if_nametoindex(ifname));
1300         return 0;
1301 }
1302
1303
1304 struct phy_info_arg {
1305         u16 *num_modes;
1306         struct hostapd_hw_modes *modes;
1307         int error;
1308 };
1309
1310 static int phy_info_handler(struct nl_msg *msg, void *arg)
1311 {
1312         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1313         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1314         struct phy_info_arg *phy_info = arg;
1315
1316         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1317
1318         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1319         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1320                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1321                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1322                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1323                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1324                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1325         };
1326
1327         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1328         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1329                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1330                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1331         };
1332
1333         struct nlattr *nl_band;
1334         struct nlattr *nl_freq;
1335         struct nlattr *nl_rate;
1336         int rem_band, rem_freq, rem_rate;
1337         struct hostapd_hw_modes *mode;
1338         int idx, mode_is_set;
1339
1340         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1341                   genlmsg_attrlen(gnlh, 0), NULL);
1342
1343         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1344                 return NL_SKIP;
1345
1346         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1347                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1348                 if (!mode)
1349                         return NL_SKIP;
1350                 phy_info->modes = mode;
1351
1352                 mode_is_set = 0;
1353
1354                 mode = &phy_info->modes[*(phy_info->num_modes)];
1355                 memset(mode, 0, sizeof(*mode));
1356                 *(phy_info->num_modes) += 1;
1357
1358                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1359                           nla_len(nl_band), NULL);
1360
1361                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1362                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1363                                   nla_len(nl_freq), freq_policy);
1364                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1365                                 continue;
1366                         mode->num_channels++;
1367                 }
1368
1369                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1370                 if (!mode->channels)
1371                         return NL_SKIP;
1372
1373                 idx = 0;
1374
1375                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1376                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1377                                   nla_len(nl_freq), freq_policy);
1378                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1379                                 continue;
1380
1381                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1382                         mode->channels[idx].flag |= HOSTAPD_CHAN_W_SCAN |
1383                                                     HOSTAPD_CHAN_W_ACTIVE_SCAN |
1384                                                     HOSTAPD_CHAN_W_IBSS;
1385
1386                         if (!mode_is_set) {
1387                                 /* crude heuristic */
1388                                 if (mode->channels[idx].freq < 4000)
1389                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1390                                 else
1391                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1392                                 mode_is_set = 1;
1393                         }
1394
1395                         /* crude heuristic */
1396                         if (mode->channels[idx].freq < 4000)
1397                                 if (mode->channels[idx].freq == 2848)
1398                                         mode->channels[idx].chan = 14;
1399                                 else
1400                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1401                         else
1402                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1403
1404                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1405                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_SCAN;
1406                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1407                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_ACTIVE_SCAN;
1408                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1409                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_IBSS;
1410                         idx++;
1411                 }
1412
1413                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1414                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1415                                   nla_len(nl_rate), rate_policy);
1416                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1417                                 continue;
1418                         mode->num_rates++;
1419                 }
1420
1421                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1422                 if (!mode->rates)
1423                         return NL_SKIP;
1424
1425                 idx = 0;
1426
1427                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1428                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1429                                   nla_len(nl_rate), rate_policy);
1430                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1431                                 continue;
1432                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1433
1434                         /* crude heuristic */
1435                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1436                             mode->rates[idx].rate > 200)
1437                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1438
1439                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1440                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1441
1442                         idx++;
1443                 }
1444         }
1445
1446         phy_info->error = 0;
1447
1448         return NL_SKIP;
1449 }
1450
1451 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
1452                                                          u16 *num_modes,
1453                                                          u16 *flags)
1454 {
1455         struct i802_driver_data *drv = priv;
1456         struct nl_msg *msg;
1457         int err = -1;
1458         struct nl_cb *cb = NULL;
1459         int finished = 0;
1460         struct phy_info_arg result = {
1461                 .num_modes = num_modes,
1462                 .modes = NULL,
1463                 .error = 1,
1464         };
1465
1466         *num_modes = 0;
1467         *flags = 0;
1468
1469         msg = nlmsg_alloc();
1470         if (!msg)
1471                 return NULL;
1472
1473         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1474                     0, NL80211_CMD_GET_WIPHY, 0);
1475
1476         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1477
1478         cb = nl_cb_clone(drv->nl_cb);
1479         if (!cb)
1480                 goto out;
1481
1482         if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
1483                 goto out;
1484
1485         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, phy_info_handler, &result);
1486         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
1487
1488         err = nl_recvmsgs(drv->nl_handle, cb);
1489
1490         if (!finished)
1491                 err = nl_wait_for_ack(drv->nl_handle);
1492
1493         if (err < 0 || result.error) {
1494                 hostapd_free_hw_features(result.modes, *num_modes);
1495                 result.modes = NULL;
1496         }
1497
1498  out:
1499         nl_cb_put(cb);
1500  nla_put_failure:
1501         if (err)
1502                 fprintf(stderr, "failed to get information: %d\n", err);
1503         nlmsg_free(msg);
1504         return result.modes;
1505 }
1506
1507
1508 static int i802_set_sta_vlan(void *priv, const u8 *addr,
1509                              const char *ifname, int vlan_id)
1510 {
1511         struct i802_driver_data *drv = priv;
1512         struct nl_msg *msg;
1513         int ret = -1;
1514
1515         msg = nlmsg_alloc();
1516         if (!msg)
1517                 goto out;
1518
1519         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1520                     0, NL80211_CMD_SET_STATION, 0);
1521
1522         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1523                     if_nametoindex(drv->iface));
1524         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1525         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1526                     if_nametoindex(ifname));
1527
1528         ret = 0;
1529
1530         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1531             (errno = nl_wait_for_ack(drv->nl_handle) < 0)) {
1532                 ret = -1;
1533         }
1534
1535  nla_put_failure:
1536         nlmsg_free(msg);
1537
1538  out:
1539         return ret;
1540 }
1541
1542
1543 static void handle_unknown_sta(struct hostapd_data *hapd, u8 *ta)
1544 {
1545         struct sta_info *sta;
1546
1547         sta = ap_get_sta(hapd, ta);
1548         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
1549                 printf("Data/PS-poll frame from not associated STA "
1550                        MACSTR "\n", MAC2STR(ta));
1551                 if (sta && (sta->flags & WLAN_STA_AUTH))
1552                         hostapd_sta_disassoc(
1553                                 hapd, ta,
1554                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1555                 else
1556                         hostapd_sta_deauth(
1557                                 hapd, ta,
1558                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1559         }
1560 }
1561
1562
1563 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
1564                                int ok)
1565 {
1566         struct ieee80211_hdr *hdr;
1567         u16 fc, type, stype;
1568         struct sta_info *sta;
1569
1570         hdr = (struct ieee80211_hdr *) buf;
1571         fc = le_to_host16(hdr->frame_control);
1572
1573         type = WLAN_FC_GET_TYPE(fc);
1574         stype = WLAN_FC_GET_STYPE(fc);
1575
1576         switch (type) {
1577         case WLAN_FC_TYPE_MGMT:
1578                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
1579                            ok ? "ACK" : "fail");
1580                 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
1581                 break;
1582         case WLAN_FC_TYPE_CTRL:
1583                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
1584                            ok ? "ACK" : "fail");
1585                 break;
1586         case WLAN_FC_TYPE_DATA:
1587                 wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
1588                            ok ? "ACK" : "fail");
1589                 sta = ap_get_sta(hapd, hdr->addr1);
1590                 if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
1591                         wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
1592                                    "activity poll", MAC2STR(sta->addr),
1593                                    ok ? "ACKed" : "did not ACK");
1594                         if (ok)
1595                                 sta->flags &= ~WLAN_STA_PENDING_POLL;
1596                 }
1597                 if (sta)
1598                         ieee802_1x_tx_status(hapd, sta, buf, len, ok);
1599                 break;
1600         default:
1601                 printf("unknown TX callback frame type %d\n", type);
1602                 break;
1603         }
1604 }
1605
1606
1607 static void handle_frame(struct hostapd_iface *iface, u8 *buf, size_t len,
1608                          struct hostapd_frame_info *hfi,
1609                          enum ieee80211_msg_type msg_type)
1610 {
1611         struct ieee80211_hdr *hdr;
1612         u16 fc, type, stype;
1613         size_t data_len = len;
1614         struct hostapd_data *hapd = NULL;
1615         int broadcast_bssid = 0;
1616         size_t i;
1617         u8 *bssid;
1618
1619         /*
1620          * PS-Poll frames are 16 bytes. All other frames are
1621          * 24 bytes or longer.
1622          */
1623         if (len < 16)
1624                 return;
1625
1626         hdr = (struct ieee80211_hdr *) buf;
1627         fc = le_to_host16(hdr->frame_control);
1628
1629         type = WLAN_FC_GET_TYPE(fc);
1630         stype = WLAN_FC_GET_STYPE(fc);
1631
1632         switch (type) {
1633         case WLAN_FC_TYPE_DATA:
1634                 if (len < 24)
1635                         return;
1636                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
1637                 case WLAN_FC_TODS:
1638                         bssid = hdr->addr1;
1639                         break;
1640                 default:
1641                         /* discard */
1642                         return;
1643                 }
1644                 break;
1645         case WLAN_FC_TYPE_CTRL:
1646                 /* discard non-ps-poll frames */
1647                 if (stype != WLAN_FC_STYPE_PSPOLL)
1648                         return;
1649                 bssid = hdr->addr1;
1650                 break;
1651         case WLAN_FC_TYPE_MGMT:
1652                 bssid = hdr->addr3;
1653                 break;
1654         default:
1655                 /* discard */
1656                 return;
1657         }
1658
1659         /* find interface frame belongs to */
1660         for (i = 0; i < iface->num_bss; i++) {
1661                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
1662                         hapd = iface->bss[i];
1663                         break;
1664                 }
1665         }
1666
1667         if (hapd == NULL) {
1668                 hapd = iface->bss[0];
1669
1670                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
1671                     bssid[2] != 0xff || bssid[3] != 0xff ||
1672                     bssid[4] != 0xff || bssid[5] != 0xff) {
1673                         /*
1674                          * Unknown BSSID - drop frame if this is not from
1675                          * passive scanning or a beacon (at least ProbeReq
1676                          * frames to other APs may be allowed through RX
1677                          * filtering in the wlan hw/driver)
1678                          */
1679                         if ((type != WLAN_FC_TYPE_MGMT ||
1680                              stype != WLAN_FC_STYPE_BEACON))
1681                                 return;
1682                 } else
1683                         broadcast_bssid = 1;
1684         }
1685
1686         switch (msg_type) {
1687         case ieee80211_msg_normal:
1688                 /* continue processing */
1689                 break;
1690         case ieee80211_msg_tx_callback_ack:
1691                 handle_tx_callback(hapd, buf, data_len, 1);
1692                 return;
1693         case ieee80211_msg_tx_callback_fail:
1694                 handle_tx_callback(hapd, buf, data_len, 0);
1695                 return;
1696         }
1697
1698         switch (type) {
1699         case WLAN_FC_TYPE_MGMT:
1700                 if (stype != WLAN_FC_STYPE_BEACON &&
1701                     stype != WLAN_FC_STYPE_PROBE_REQ)
1702                         wpa_printf(MSG_MSGDUMP, "MGMT");
1703                 if (broadcast_bssid) {
1704                         for (i = 0; i < iface->num_bss; i++)
1705                                 ieee802_11_mgmt(iface->bss[i], buf, data_len,
1706                                                 stype, hfi);
1707                 } else
1708                         ieee802_11_mgmt(hapd, buf, data_len, stype, hfi);
1709                 break;
1710         case WLAN_FC_TYPE_CTRL:
1711                 /* can only get here with PS-Poll frames */
1712                 wpa_printf(MSG_DEBUG, "CTRL");
1713                 handle_unknown_sta(hapd, hdr->addr2);
1714                 break;
1715         case WLAN_FC_TYPE_DATA:
1716                 wpa_printf(MSG_DEBUG, "DATA");
1717                 handle_unknown_sta(hapd, hdr->addr2);
1718                 break;
1719         }
1720 }
1721
1722
1723 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
1724 {
1725         struct i802_driver_data *drv = eloop_ctx;
1726         struct hostapd_data *hapd = drv->hapd;
1727         struct sockaddr_ll lladdr;
1728         unsigned char buf[3000];
1729         int len;
1730         socklen_t fromlen = sizeof(lladdr);
1731
1732         len = recvfrom(sock, buf, sizeof(buf), 0,
1733                        (struct sockaddr *)&lladdr, &fromlen);
1734         if (len < 0) {
1735                 perror("recv");
1736                 return;
1737         }
1738
1739         if (have_ifidx(drv, lladdr.sll_ifindex))
1740                 ieee802_1x_receive(hapd, lladdr.sll_addr, buf, len);
1741 }
1742
1743
1744 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1745 {
1746         struct i802_driver_data *drv = eloop_ctx;
1747         int len;
1748         unsigned char buf[3000];
1749         struct hostapd_data *hapd = drv->hapd;
1750         struct ieee80211_radiotap_iterator iter;
1751         int ret;
1752         struct hostapd_frame_info hfi;
1753         int injected = 0, failed = 0, msg_type, rxflags = 0;
1754
1755         len = recv(sock, buf, sizeof(buf), 0);
1756         if (len < 0) {
1757                 perror("recv");
1758                 return;
1759         }
1760
1761         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
1762                 printf("received invalid radiotap frame\n");
1763                 return;
1764         }
1765
1766         memset(&hfi, 0, sizeof(hfi));
1767
1768         while (1) {
1769                 ret = ieee80211_radiotap_iterator_next(&iter);
1770                 if (ret == -ENOENT)
1771                         break;
1772                 if (ret) {
1773                         printf("received invalid radiotap frame (%d)\n", ret);
1774                         return;
1775                 }
1776                 switch (iter.this_arg_index) {
1777                 case IEEE80211_RADIOTAP_FLAGS:
1778                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1779                                 len -= 4;
1780                         break;
1781                 case IEEE80211_RADIOTAP_RX_FLAGS:
1782                         rxflags = 1;
1783                         break;
1784                 case IEEE80211_RADIOTAP_TX_FLAGS:
1785                         injected = 1;
1786                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
1787                                         IEEE80211_RADIOTAP_F_TX_FAIL;
1788                         break;
1789                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1790                         break;
1791                 case IEEE80211_RADIOTAP_CHANNEL:
1792                         /* TODO convert from freq/flags to channel number
1793                         hfi.channel = XXX;
1794                         hfi.phytype = XXX;
1795                          */
1796                         break;
1797                 case IEEE80211_RADIOTAP_RATE:
1798                         hfi.datarate = *iter.this_arg * 5;
1799                         break;
1800                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1801                         hfi.ssi_signal = *iter.this_arg;
1802                         break;
1803                 }
1804         }
1805
1806         if (rxflags && injected)
1807                 return;
1808
1809         if (!injected)
1810                 msg_type = ieee80211_msg_normal;
1811         else if (failed)
1812                 msg_type = ieee80211_msg_tx_callback_fail;
1813         else
1814                 msg_type = ieee80211_msg_tx_callback_ack;
1815
1816         handle_frame(hapd->iface, buf + iter.max_length,
1817                      len - iter.max_length, &hfi, msg_type);
1818 }
1819
1820
1821 static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
1822 {
1823         char buf[IFNAMSIZ];
1824         struct sockaddr_ll ll;
1825         int optval;
1826         socklen_t optlen;
1827
1828         snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
1829         buf[IFNAMSIZ - 1] = '\0';
1830
1831         drv->monitor_ifidx =
1832                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
1833
1834         if (drv->monitor_ifidx < 0)
1835                 return -1;
1836
1837         if (hostapd_set_iface_flags(drv, buf, 1))
1838                 goto error;
1839
1840         memset(&ll, 0, sizeof(ll));
1841         ll.sll_family = AF_PACKET;
1842         ll.sll_ifindex = drv->monitor_ifidx;
1843         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1844         if (drv->monitor_sock < 0) {
1845                 perror("socket[PF_PACKET,SOCK_RAW]");
1846                 goto error;
1847         }
1848
1849         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1850                  sizeof(ll)) < 0) {
1851                 perror("monitor socket bind");
1852                 goto error;
1853         }
1854
1855         optlen = sizeof(optval);
1856         optval = 20;
1857         if (setsockopt
1858             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1859                 perror("Failed to set socket priority");
1860                 goto error;
1861         }
1862
1863         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1864                                      drv, NULL)) {
1865                 printf("Could not register monitor read socket\n");
1866                 goto error;
1867         }
1868
1869         return 0;
1870  error:
1871         nl80211_remove_iface(drv, drv->monitor_ifidx);
1872         return -1;
1873 }
1874
1875
1876 static int nl80211_set_master_mode(struct i802_driver_data *drv,
1877                                    const char *ifname)
1878 {
1879         struct nl_msg *msg;
1880
1881         msg = nlmsg_alloc();
1882         if (!msg)
1883                 return -1;
1884
1885         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1886                     0, NL80211_CMD_SET_INTERFACE, 0);
1887         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1888                     if_nametoindex(ifname));
1889         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
1890
1891         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1892             nl_wait_for_ack(drv->nl_handle) < 0) {
1893  nla_put_failure:
1894                 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
1895                            "mode.", ifname);
1896                 nlmsg_free(msg);
1897                 return -1;
1898         }
1899
1900         nlmsg_free(msg);
1901
1902         return 0;
1903 }
1904
1905
1906 static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
1907 {
1908         struct ifreq ifr;
1909         struct sockaddr_ll addr;
1910
1911         drv->ioctl_sock = -1;
1912
1913         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1914         if (drv->ioctl_sock < 0) {
1915                 perror("socket[PF_INET,SOCK_DGRAM]");
1916                 return -1;
1917         }
1918
1919         /* start listening for EAPOL on the default AP interface */
1920         add_ifidx(drv, if_nametoindex(drv->iface));
1921
1922         if (hostapd_set_iface_flags(drv, drv->iface, 0))
1923                 return -1;
1924
1925         if (bssid) {
1926                 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
1927                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
1928                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1929
1930                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
1931                         perror("ioctl(SIOCSIFHWADDR)");
1932                         return -1;
1933                 }
1934         }
1935
1936         /*
1937          * initialise generic netlink and nl80211
1938          */
1939         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1940         if (!drv->nl_cb) {
1941                 printf("Failed to allocate netlink callbacks.\n");
1942                 return -1;
1943         }
1944
1945         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1946         if (!drv->nl_handle) {
1947                 printf("Failed to allocate netlink handle.\n");
1948                 return -1;
1949         }
1950
1951         if (genl_connect(drv->nl_handle)) {
1952                 printf("Failed to connect to generic netlink.\n");
1953                 return -1;
1954         }
1955
1956         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1957         if (!drv->nl_cache) {
1958                 printf("Failed to allocate generic netlink cache.\n");
1959                 return -1;
1960         }
1961
1962         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1963         if (!drv->nl80211) {
1964                 printf("nl80211 not found.\n");
1965                 return -1;
1966         }
1967
1968         /* Initialise a monitor interface */
1969         if (nl80211_create_monitor_interface(drv))
1970                 return -1;
1971
1972         if (nl80211_set_master_mode(drv, drv->iface))
1973                 return -1;
1974
1975         if (hostapd_set_iface_flags(drv, drv->iface, 1))
1976                 return -1;
1977
1978         memset(&addr, 0, sizeof(addr));
1979         addr.sll_family = AF_PACKET;
1980         addr.sll_ifindex = ifr.ifr_ifindex;
1981         wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
1982                    addr.sll_ifindex);
1983
1984         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
1985         if (drv->eapol_sock < 0) {
1986                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
1987                 return -1;
1988         }
1989
1990         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
1991         {
1992                 printf("Could not register read socket for eapol\n");
1993                 return -1;
1994         }
1995
1996         memset(&ifr, 0, sizeof(ifr));
1997         os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
1998         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
1999                 perror("ioctl(SIOCGIFHWADDR)");
2000                 return -1;
2001         }
2002
2003         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
2004                 printf("Invalid HW-addr family 0x%04x\n",
2005                        ifr.ifr_hwaddr.sa_family);
2006                 return -1;
2007         }
2008         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
2009
2010         return 0;
2011 }
2012
2013
2014 static int i802_get_inact_sec(void *priv, const u8 *addr)
2015 {
2016         struct hostap_sta_driver_data data;
2017         int ret;
2018
2019         data.inactive_msec = (unsigned long) -1;
2020         ret = i802_read_sta_data(priv, &data, addr);
2021         if (ret || data.inactive_msec == (unsigned long) -1)
2022                 return -1;
2023         return data.inactive_msec / 1000;
2024 }
2025
2026
2027 static int i802_sta_clear_stats(void *priv, const u8 *addr)
2028 {
2029 #if 0
2030         /* TODO */
2031 #endif
2032         return 0;
2033 }
2034
2035
2036 static void
2037 hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
2038                                        char *custom)
2039 {
2040         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
2041
2042         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
2043                 char *pos;
2044                 u8 addr[ETH_ALEN];
2045                 pos = strstr(custom, "addr=");
2046                 if (pos == NULL) {
2047                         wpa_printf(MSG_DEBUG,
2048                                    "MLME-MICHAELMICFAILURE.indication "
2049                                    "without sender address ignored");
2050                         return;
2051                 }
2052                 pos += 5;
2053                 if (hwaddr_aton(pos, addr) == 0) {
2054                         ieee80211_michael_mic_failure(drv->hapd, addr, 1);
2055                 } else {
2056                         wpa_printf(MSG_DEBUG,
2057                                    "MLME-MICHAELMICFAILURE.indication "
2058                                    "with invalid MAC address");
2059                 }
2060         }
2061 }
2062
2063
2064 static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
2065                                             char *data, int len)
2066 {
2067         struct iw_event iwe_buf, *iwe = &iwe_buf;
2068         char *pos, *end, *custom, *buf;
2069
2070         pos = data;
2071         end = data + len;
2072
2073         while (pos + IW_EV_LCP_LEN <= end) {
2074                 /* Event data may be unaligned, so make a local, aligned copy
2075                  * before processing. */
2076                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2077                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
2078                            iwe->cmd, iwe->len);
2079                 if (iwe->len <= IW_EV_LCP_LEN)
2080                         return;
2081
2082                 custom = pos + IW_EV_POINT_LEN;
2083                 if (drv->we_version > 18 &&
2084                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
2085                      iwe->cmd == IWEVCUSTOM)) {
2086                         /* WE-19 removed the pointer from struct iw_point */
2087                         char *dpos = (char *) &iwe_buf.u.data.length;
2088                         int dlen = dpos - (char *) &iwe_buf;
2089                         memcpy(dpos, pos + IW_EV_LCP_LEN,
2090                                sizeof(struct iw_event) - dlen);
2091                 } else {
2092                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2093                         custom += IW_EV_POINT_OFF;
2094                 }
2095
2096                 switch (iwe->cmd) {
2097                 case IWEVCUSTOM:
2098                         if (custom + iwe->u.data.length > end)
2099                                 return;
2100                         buf = malloc(iwe->u.data.length + 1);
2101                         if (buf == NULL)
2102                                 return;
2103                         memcpy(buf, custom, iwe->u.data.length);
2104                         buf[iwe->u.data.length] = '\0';
2105                         hostapd_wireless_event_wireless_custom(drv, buf);
2106                         free(buf);
2107                         break;
2108                 }
2109
2110                 pos += iwe->len;
2111         }
2112 }
2113
2114
2115 static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
2116                                                struct nlmsghdr *h, int len)
2117 {
2118         struct ifinfomsg *ifi;
2119         int attrlen, nlmsg_len, rta_len;
2120         struct rtattr *attr;
2121
2122         if (len < (int) sizeof(*ifi))
2123                 return;
2124
2125         ifi = NLMSG_DATA(h);
2126
2127         /* TODO: use ifi->ifi_index to filter out wireless events from other
2128          * interfaces */
2129
2130         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2131
2132         attrlen = h->nlmsg_len - nlmsg_len;
2133         if (attrlen < 0)
2134                 return;
2135
2136         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
2137
2138         rta_len = RTA_ALIGN(sizeof(struct rtattr));
2139         while (RTA_OK(attr, attrlen)) {
2140                 if (attr->rta_type == IFLA_WIRELESS) {
2141                         hostapd_wireless_event_wireless(
2142                                 drv, ((char *) attr) + rta_len,
2143                                 attr->rta_len - rta_len);
2144                 }
2145                 attr = RTA_NEXT(attr, attrlen);
2146         }
2147 }
2148
2149
2150 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
2151                                            void *sock_ctx)
2152 {
2153         char buf[256];
2154         int left;
2155         struct sockaddr_nl from;
2156         socklen_t fromlen;
2157         struct nlmsghdr *h;
2158         struct i802_driver_data *drv = eloop_ctx;
2159
2160         fromlen = sizeof(from);
2161         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
2162                         (struct sockaddr *) &from, &fromlen);
2163         if (left < 0) {
2164                 if (errno != EINTR && errno != EAGAIN)
2165                         perror("recvfrom(netlink)");
2166                 return;
2167         }
2168
2169         h = (struct nlmsghdr *) buf;
2170         while (left >= (int) sizeof(*h)) {
2171                 int len, plen;
2172
2173                 len = h->nlmsg_len;
2174                 plen = len - sizeof(*h);
2175                 if (len > left || plen < 0) {
2176                         printf("Malformed netlink message: "
2177                                "len=%d left=%d plen=%d\n",
2178                                len, left, plen);
2179                         break;
2180                 }
2181
2182                 switch (h->nlmsg_type) {
2183                 case RTM_NEWLINK:
2184                         hostapd_wireless_event_rtm_newlink(drv, h, plen);
2185                         break;
2186                 }
2187
2188                 len = NLMSG_ALIGN(len);
2189                 left -= len;
2190                 h = (struct nlmsghdr *) ((char *) h + len);
2191         }
2192
2193         if (left > 0) {
2194                 printf("%d extra bytes in the end of netlink message\n", left);
2195         }
2196 }
2197
2198
2199 static int hostap_get_we_version(struct i802_driver_data *drv)
2200 {
2201         struct iw_range *range;
2202         struct iwreq iwr;
2203         int minlen;
2204         size_t buflen;
2205
2206         drv->we_version = 0;
2207
2208         /*
2209          * Use larger buffer than struct iw_range in order to allow the
2210          * structure to grow in the future.
2211          */
2212         buflen = sizeof(struct iw_range) + 500;
2213         range = os_zalloc(buflen);
2214         if (range == NULL)
2215                 return -1;
2216
2217         memset(&iwr, 0, sizeof(iwr));
2218         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2219         iwr.u.data.pointer = (caddr_t) range;
2220         iwr.u.data.length = buflen;
2221
2222         minlen = ((char *) &range->enc_capa) - (char *) range +
2223                 sizeof(range->enc_capa);
2224
2225         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2226                 perror("ioctl[SIOCGIWRANGE]");
2227                 free(range);
2228                 return -1;
2229         } else if (iwr.u.data.length >= minlen &&
2230                    range->we_version_compiled >= 18) {
2231                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2232                            "WE(source)=%d enc_capa=0x%x",
2233                            range->we_version_compiled,
2234                            range->we_version_source,
2235                            range->enc_capa);
2236                 drv->we_version = range->we_version_compiled;
2237         }
2238
2239         free(range);
2240         return 0;
2241 }
2242
2243
2244 static int i802_wireless_event_init(void *priv)
2245 {
2246         struct i802_driver_data *drv = priv;
2247         int s;
2248         struct sockaddr_nl local;
2249
2250         hostap_get_we_version(drv);
2251
2252         drv->wext_sock = -1;
2253
2254         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2255         if (s < 0) {
2256                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2257                 return -1;
2258         }
2259
2260         memset(&local, 0, sizeof(local));
2261         local.nl_family = AF_NETLINK;
2262         local.nl_groups = RTMGRP_LINK;
2263         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2264                 perror("bind(netlink)");
2265                 close(s);
2266                 return -1;
2267         }
2268
2269         eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
2270                                  NULL);
2271         drv->wext_sock = s;
2272
2273         return 0;
2274 }
2275
2276
2277 static void i802_wireless_event_deinit(void *priv)
2278 {
2279         struct i802_driver_data *drv = priv;
2280         if (drv->wext_sock < 0)
2281                 return;
2282         eloop_unregister_read_sock(drv->wext_sock);
2283         close(drv->wext_sock);
2284 }
2285
2286
2287 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
2288 {
2289         struct i802_driver_data *drv = priv;
2290         struct ieee80211_mgmt mgmt;
2291
2292         memset(&mgmt, 0, sizeof(mgmt));
2293         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2294                                           WLAN_FC_STYPE_DEAUTH);
2295         memcpy(mgmt.da, addr, ETH_ALEN);
2296         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2297         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2298         mgmt.u.deauth.reason_code = host_to_le16(reason);
2299         return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2300                                       sizeof(mgmt.u.deauth), 0);
2301 }
2302
2303
2304 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
2305 {
2306         struct i802_driver_data *drv = priv;
2307         struct ieee80211_mgmt mgmt;
2308
2309         memset(&mgmt, 0, sizeof(mgmt));
2310         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2311                                           WLAN_FC_STYPE_DISASSOC);
2312         memcpy(mgmt.da, addr, ETH_ALEN);
2313         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2314         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2315         mgmt.u.disassoc.reason_code = host_to_le16(reason);
2316         return  i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2317                                        sizeof(mgmt.u.disassoc), 0);
2318 }
2319
2320
2321 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
2322 {
2323         struct i802_driver_data *drv;
2324
2325         drv = os_zalloc(sizeof(struct i802_driver_data));
2326         if (drv == NULL) {
2327                 printf("Could not allocate memory for i802 driver data\n");
2328                 return NULL;
2329         }
2330
2331         drv->hapd = hapd;
2332         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
2333
2334         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
2335         drv->if_indices = drv->default_if_indices;
2336         drv->bridge = if_nametoindex(hapd->conf->bridge);
2337
2338         if (i802_init_sockets(drv, bssid))
2339                 goto failed;
2340
2341         return drv;
2342
2343 failed:
2344         free(drv);
2345         return NULL;
2346 }
2347
2348
2349 static void *i802_init(struct hostapd_data *hapd)
2350 {
2351         return i802_init_bssid(hapd, NULL);
2352 }
2353
2354
2355 static void i802_deinit(void *priv)
2356 {
2357         struct i802_driver_data *drv = priv;
2358
2359         i802_del_beacon(drv);
2360
2361         /* remove monitor interface */
2362         nl80211_remove_iface(drv, drv->monitor_ifidx);
2363
2364         (void) hostapd_set_iface_flags(drv, drv->iface, 0);
2365
2366         if (drv->monitor_sock >= 0) {
2367                 eloop_unregister_read_sock(drv->monitor_sock);
2368                 close(drv->monitor_sock);
2369         }
2370         if (drv->ioctl_sock >= 0)
2371                 close(drv->ioctl_sock);
2372         if (drv->eapol_sock >= 0) {
2373                 eloop_unregister_read_sock(drv->eapol_sock);
2374                 close(drv->eapol_sock);
2375         }
2376
2377         genl_family_put(drv->nl80211);
2378         nl_cache_free(drv->nl_cache);
2379         nl_handle_destroy(drv->nl_handle);
2380         nl_cb_put(drv->nl_cb);
2381
2382         if (drv->if_indices != drv->default_if_indices)
2383                 free(drv->if_indices);
2384
2385         free(drv);
2386 }
2387
2388
2389 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2390         .name = "nl80211",
2391         .init = i802_init,
2392         .init_bssid = i802_init_bssid,
2393         .deinit = i802_deinit,
2394         .wireless_event_init = i802_wireless_event_init,
2395         .wireless_event_deinit = i802_wireless_event_deinit,
2396         .set_ieee8021x = i802_set_ieee8021x,
2397         .set_privacy = i802_set_privacy,
2398         .set_encryption = i802_set_encryption,
2399         .get_seqnum = i802_get_seqnum,
2400         .flush = i802_flush,
2401         .read_sta_data = i802_read_sta_data,
2402         .send_eapol = i802_send_eapol,
2403         .sta_set_flags = i802_sta_set_flags,
2404         .sta_deauth = i802_sta_deauth,
2405         .sta_disassoc = i802_sta_disassoc,
2406         .sta_remove = i802_sta_remove,
2407         .set_ssid = i802_set_ssid,
2408         .send_mgmt_frame = i802_send_mgmt_frame,
2409         .sta_add = i802_sta_add,
2410         .get_inact_sec = i802_get_inact_sec,
2411         .sta_clear_stats = i802_sta_clear_stats,
2412         .set_freq = i802_set_freq,
2413         .set_rts = i802_set_rts,
2414         .get_rts = i802_get_rts,
2415         .set_frag = i802_set_frag,
2416         .get_frag = i802_get_frag,
2417         .set_retry = i802_set_retry,
2418         .get_retry = i802_get_retry,
2419         .set_rate_sets = i802_set_rate_sets,
2420         .set_channel_flag = i802_set_channel_flag,
2421         .set_regulatory_domain = i802_set_regulatory_domain,
2422         .set_beacon = i802_set_beacon,
2423         .set_internal_bridge = i802_set_internal_bridge,
2424         .set_beacon_int = i802_set_beacon_int,
2425         .set_dtim_period = i802_set_dtim_period,
2426         .set_cts_protect = i802_set_cts_protect,
2427         .set_preamble = i802_set_preamble,
2428         .set_short_slot_time = i802_set_short_slot_time,
2429         .set_tx_queue_params = i802_set_tx_queue_params,
2430         .bss_add = i802_bss_add,
2431         .bss_remove = i802_bss_remove,
2432         .if_add = i802_if_add,
2433         .if_update = i802_if_update,
2434         .if_remove = i802_if_remove,
2435         .get_hw_feature_data = i802_get_hw_feature_data,
2436         .set_sta_vlan = i802_set_sta_vlan,
2437 };