git.maemo.org Git - wpasupplicant/blob - 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_add2(const char *ifname, void *priv,
 794                          struct hostapd_sta_add_params *params)
 795 {
 796         struct i802_driver_data *drv = priv;
 797         struct nl_msg *msg;
 798         int ret = -1;
 799
 800         msg = nlmsg_alloc();
 801         if (!msg)
 802                 goto out;
 803
 804         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 805                     0, NL80211_CMD_NEW_STATION, 0);
 806
 807         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 808                     if_nametoindex(drv->iface));
 809         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
 810         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
 811         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
 812                 params->supp_rates);
 813         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
 814                     params->listen_interval);
 815
 816 #ifdef CONFIG_IEEE80211N
 817 #ifdef NL80211_ATTR_HT_CAPABILITY
 818         if (params->ht_capabilities) {
 819                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
 820                         params->ht_capabilities->length,
 821                         &params->ht_capabilities->data);
 822         }
 823 #endif /* NL80211_ATTR_HT_CAPABILITY */
 824 #endif /* CONFIG_IEEE80211N */
 825
 826         ret = nl_send_auto_complete(drv->nl_handle, msg);
 827         if (ret < 0)
 828                 goto nla_put_failure;
 829
 830         ret = nl_wait_for_ack(drv->nl_handle);
 831         /* ignore EEXIST, this happens if a STA associates while associated */
 832         if (ret == -EEXIST || ret >= 0)
 833                 ret = 0;
 834
 835  nla_put_failure:
 836         nlmsg_free(msg);
 837
 838  out:
 839         return ret;
 840 }
 841
 842
 843 static int i802_sta_remove(void *priv, const u8 *addr)
 844 {
 845         struct i802_driver_data *drv = priv;
 846         struct nl_msg *msg;
 847         int ret = -1;
 848
 849         msg = nlmsg_alloc();
 850         if (!msg)
 851                 goto out;
 852
 853         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 854                     0, NL80211_CMD_DEL_STATION, 0);
 855
 856         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 857                     if_nametoindex(drv->iface));
 858         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 859
 860         ret = 0;
 861
 862         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 863             nl_wait_for_ack(drv->nl_handle) < 0) {
 864                 ret = -1;
 865         }
 866
 867  nla_put_failure:
 868         nlmsg_free(msg);
 869
 870  out:
 871         return ret;
 872 }
 873
 874
 875 static int i802_sta_set_flags(void *priv, const u8 *addr,
 876                               int total_flags, int flags_or, int flags_and)
 877 {
 878         struct i802_driver_data *drv = priv;
 879         struct nl_msg *msg, *flags = NULL;
 880         int ret = -1;
 881
 882         msg = nlmsg_alloc();
 883         if (!msg)
 884                 goto out;
 885
 886         flags = nlmsg_alloc();
 887         if (!flags)
 888                 goto free_msg;
 889
 890         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 891                     0, NL80211_CMD_SET_STATION, 0);
 892
 893         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 894                     if_nametoindex(drv->iface));
 895         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 896
 897         if (total_flags & WLAN_STA_AUTHORIZED || !drv->ieee802_1x_active)
 898                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
 899
 900         if (total_flags & WLAN_STA_WME)
 901                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
 902
 903         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
 904                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
 905
 906 #ifdef NL80211_MFP_PENDING
 907         if (total_flags & WLAN_STA_MFP)
 908                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
 909 #endif /* NL80211_MFP_PENDING */
 910
 911         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
 912                 goto nla_put_failure;
 913
 914         ret = 0;
 915
 916         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 917             nl_wait_for_ack(drv->nl_handle) < 0) {
 918                 ret = -1;
 919         }
 920
 921  nla_put_failure:
 922         nlmsg_free(flags);
 923
 924  free_msg:
 925         nlmsg_free(msg);
 926
 927  out:
 928         return ret;
 929 }
 930
 931
 932 static int i802_set_channel_flag(void *priv, int mode, int chan, int flag,
 933                                  unsigned char power_level,
 934                                  unsigned char antenna_max)
 935 {
 936         return -1;
 937 }
 938
 939
 940 static int i802_set_regulatory_domain(void *priv, unsigned int rd)
 941 {
 942         return -1;
 943 }
 944
 945
 946 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
 947                                     int cw_min, int cw_max, int burst_time)
 948 {
 949         return -1;
 950 }
 951
 952
 953 static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
 954 {
 955         struct nl_msg *msg;
 956
 957         /* stop listening for EAPOL on this interface */
 958         del_ifidx(drv, ifidx);
 959
 960         msg = nlmsg_alloc();
 961         if (!msg)
 962                 goto nla_put_failure;
 963
 964         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 965                     0, NL80211_CMD_DEL_INTERFACE, 0);
 966         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
 967         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 968             nl_wait_for_ack(drv->nl_handle) < 0)
 969         nla_put_failure:
 970                 printf("Failed to remove interface.\n");
 971         nlmsg_free(msg);
 972 }
 973
 974
 975 static int nl80211_create_iface(struct i802_driver_data *drv,
 976                                 const char *ifname,
 977                                 enum nl80211_iftype iftype,
 978                                 const u8 *addr)
 979 {
 980         struct nl_msg *msg, *flags = NULL;
 981         int ifidx;
 982         struct ifreq ifreq;
 983         struct iwreq iwr;
 984
 985         msg = nlmsg_alloc();
 986         if (!msg)
 987                 return -1;
 988
 989         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 990                     0, NL80211_CMD_NEW_INTERFACE, 0);
 991         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 992                     if_nametoindex(drv->hapd->conf->iface));
 993         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
 994         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
 995
 996         if (iftype == NL80211_IFTYPE_MONITOR) {
 997                 int err;
 998
 999                 flags = nlmsg_alloc();
1000                 if (!flags)
1001                         goto nla_put_failure;
1002
1003                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
1004
1005                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
1006
1007                 nlmsg_free(flags);
1008
1009                 if (err)
1010                         goto nla_put_failure;
1011         }
1012
1013         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1014             nl_wait_for_ack(drv->nl_handle) < 0) {
1015  nla_put_failure:
1016                 printf("Failed to create interface %s.\n", ifname);
1017                 nlmsg_free(msg);
1018                 return -1;
1019         }
1020
1021         nlmsg_free(msg);
1022
1023         ifidx = if_nametoindex(ifname);
1024
1025         if (ifidx <= 0)
1026                 return -1;
1027
1028         /* start listening for EAPOL on this interface */
1029         add_ifidx(drv, ifidx);
1030
1031         if (addr) {
1032                 switch (iftype) {
1033                 case NL80211_IFTYPE_AP:
1034                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
1035                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
1036                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1037
1038                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
1039                                 nl80211_remove_iface(drv, ifidx);
1040                                 return -1;
1041                         }
1042                         break;
1043                 case NL80211_IFTYPE_WDS:
1044                         memset(&iwr, 0, sizeof(iwr));
1045                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1046                         iwr.u.addr.sa_family = ARPHRD_ETHER;
1047                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
1048                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
1049                                 return -1;
1050                         break;
1051                 default:
1052                         /* nothing */
1053                         break;
1054                 }
1055         }
1056
1057         return ifidx;
1058 }
1059
1060
1061 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
1062 {
1063         int ifidx;
1064
1065         /*
1066          * The kernel supports that when the low-level driver does,
1067          * but we currently don't because we need per-BSS data that
1068          * currently we can't handle easily.
1069          */
1070         return -1;
1071
1072         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
1073         if (ifidx < 0)
1074                 return -1;
1075         if (hostapd_set_iface_flags(priv, ifname, 1)) {
1076                 nl80211_remove_iface(priv, ifidx);
1077                 return -1;
1078         }
1079         return 0;
1080 }
1081
1082
1083 static int i802_bss_remove(void *priv, const char *ifname)
1084 {
1085         nl80211_remove_iface(priv, if_nametoindex(ifname));
1086         return 0;
1087 }
1088
1089
1090 static int i802_set_beacon(const char *iface, void *priv,
1091                            u8 *head, size_t head_len,
1092                            u8 *tail, size_t tail_len)
1093 {
1094         struct i802_driver_data *drv = priv;
1095         struct nl_msg *msg;
1096         u8 cmd = NL80211_CMD_NEW_BEACON;
1097         int ret = -1;
1098
1099         msg = nlmsg_alloc();
1100         if (!msg)
1101                 goto out;
1102
1103         if (drv->beacon_set)
1104                 cmd = NL80211_CMD_SET_BEACON;
1105
1106         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1107                     0, cmd, 0);
1108         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1109         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1110         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1111         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
1112
1113         if (!drv->dtim_period)
1114                 drv->dtim_period = 2;
1115         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1116
1117         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1118             nl_wait_for_ack(drv->nl_handle) < 0)
1119                 goto out;
1120
1121         ret = 0;
1122
1123         drv->beacon_set = 1;
1124
1125  out:
1126  nla_put_failure:
1127         nlmsg_free(msg);
1128         return ret;
1129 }
1130
1131
1132 static int i802_del_beacon(struct i802_driver_data *drv)
1133 {
1134         struct nl_msg *msg;
1135         int ret = -1;
1136
1137         msg = nlmsg_alloc();
1138         if (!msg)
1139                 goto out;
1140
1141         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1142                     0, NL80211_CMD_DEL_BEACON, 0);
1143         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1144
1145         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1146             nl_wait_for_ack(drv->nl_handle) < 0)
1147                 goto out;
1148
1149         ret = 0;
1150
1151  out:
1152  nla_put_failure:
1153         nlmsg_free(msg);
1154         return ret;
1155 }
1156
1157
1158 static int i802_set_ieee8021x(const char *ifname, void *priv, int enabled)
1159 {
1160         struct i802_driver_data *drv = priv;
1161
1162         /*
1163          * FIXME: This needs to be per interface (BSS)
1164          */
1165         drv->ieee802_1x_active = enabled;
1166         return 0;
1167 }
1168
1169
1170 static int i802_set_privacy(const char *ifname, void *priv, int enabled)
1171 {
1172         struct i802_driver_data *drv = priv;
1173         struct iwreq iwr;
1174
1175         memset(&iwr, 0, sizeof(iwr));
1176
1177         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1178         iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
1179         iwr.u.param.value = enabled;
1180
1181         ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
1182
1183         /* ignore errors, the kernel/driver might not care */
1184         return 0;
1185 }
1186
1187
1188 static int i802_set_internal_bridge(void *priv, int value)
1189 {
1190         return -1;
1191 }
1192
1193
1194 static int i802_set_beacon_int(void *priv, int value)
1195 {
1196         struct i802_driver_data *drv = priv;
1197         struct nl_msg *msg;
1198         int ret = -1;
1199
1200         drv->beacon_int = value;
1201
1202         if (!drv->beacon_set)
1203                 return 0;
1204
1205         msg = nlmsg_alloc();
1206         if (!msg)
1207                 goto out;
1208
1209         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1210                     0, NL80211_CMD_SET_BEACON, 0);
1211         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1212
1213         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
1214
1215         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1216             nl_wait_for_ack(drv->nl_handle) < 0)
1217                 goto out;
1218
1219         ret = 0;
1220
1221  out:
1222  nla_put_failure:
1223         nlmsg_free(msg);
1224         return ret;
1225 }
1226
1227
1228 static int i802_set_dtim_period(const char *iface, void *priv, int value)
1229 {
1230         struct i802_driver_data *drv = priv;
1231         struct nl_msg *msg;
1232         int ret = -1;
1233
1234         msg = nlmsg_alloc();
1235         if (!msg)
1236                 goto out;
1237
1238         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1239                     0, NL80211_CMD_SET_BEACON, 0);
1240         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1241
1242         drv->dtim_period = value;
1243         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1244
1245         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1246             nl_wait_for_ack(drv->nl_handle) < 0)
1247                 goto out;
1248
1249         ret = 0;
1250
1251  out:
1252  nla_put_failure:
1253         nlmsg_free(msg);
1254         return ret;
1255 }
1256
1257
1258 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
1259 {
1260 #ifdef NL80211_CMD_SET_BSS
1261         struct i802_driver_data *drv = priv;
1262         struct nl_msg *msg;
1263         int ret = -1;
1264
1265         msg = nlmsg_alloc();
1266         if (!msg)
1267                 goto out;
1268
1269         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1270                     NL80211_CMD_SET_BSS, 0);
1271
1272         if (cts >= 0)
1273                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
1274         if (preamble >= 0)
1275                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
1276         if (slot >= 0)
1277                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
1278
1279         ret = 0;
1280
1281         /* TODO: multi-BSS support */
1282         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1283
1284         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1285             nl_wait_for_ack(drv->nl_handle) < 0) {
1286                 ret = -1;
1287         }
1288
1289 nla_put_failure:
1290         nlmsg_free(msg);
1291
1292 out:
1293         return ret;
1294 #else /* NL80211_CMD_SET_BSS */
1295         return -1;
1296 #endif /* NL80211_CMD_SET_BSS */
1297 }
1298
1299
1300 static int i802_set_cts_protect(void *priv, int value)
1301 {
1302         return i802_set_bss(priv, value, -1, -1);
1303 }
1304
1305
1306 static int i802_set_preamble(void *priv, int value)
1307 {
1308         return i802_set_bss(priv, -1, value, -1);
1309 }
1310
1311
1312 static int i802_set_short_slot_time(void *priv, int value)
1313 {
1314         return i802_set_bss(priv, -1, -1, value);
1315 }
1316
1317
1318 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
1319 {
1320         switch (type) {
1321         case HOSTAPD_IF_VLAN:
1322                 return NL80211_IFTYPE_AP_VLAN;
1323         case HOSTAPD_IF_WDS:
1324                 return NL80211_IFTYPE_WDS;
1325         }
1326         return -1;
1327 }
1328
1329
1330 static int i802_if_add(const char *iface, void *priv,
1331                        enum hostapd_driver_if_type type, char *ifname,
1332                        const u8 *addr)
1333 {
1334         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
1335                 return -1;
1336         return 0;
1337 }
1338
1339
1340 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
1341                           char *ifname, const u8 *addr)
1342 {
1343         /* unused at the moment */
1344         return -1;
1345 }
1346
1347
1348 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
1349                           const char *ifname, const u8 *addr)
1350 {
1351         nl80211_remove_iface(priv, if_nametoindex(ifname));
1352         return 0;
1353 }
1354
1355
1356 struct phy_info_arg {
1357         u16 *num_modes;
1358         struct hostapd_hw_modes *modes;
1359         int error;
1360 };
1361
1362 static int phy_info_handler(struct nl_msg *msg, void *arg)
1363 {
1364         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1365         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1366         struct phy_info_arg *phy_info = arg;
1367
1368         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1369
1370         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1371         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1372                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1373                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1374                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1375                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1376                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1377         };
1378
1379         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1380         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1381                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1382                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1383         };
1384
1385         struct nlattr *nl_band;
1386         struct nlattr *nl_freq;
1387         struct nlattr *nl_rate;
1388         int rem_band, rem_freq, rem_rate;
1389         struct hostapd_hw_modes *mode;
1390         int idx, mode_is_set;
1391
1392         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1393                   genlmsg_attrlen(gnlh, 0), NULL);
1394
1395         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1396                 return NL_SKIP;
1397
1398         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1399                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1400                 if (!mode)
1401                         return NL_SKIP;
1402                 phy_info->modes = mode;
1403
1404                 mode_is_set = 0;
1405
1406                 mode = &phy_info->modes[*(phy_info->num_modes)];
1407                 memset(mode, 0, sizeof(*mode));
1408                 *(phy_info->num_modes) += 1;
1409
1410                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1411                           nla_len(nl_band), NULL);
1412
1413                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1414                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1415                                   nla_len(nl_freq), freq_policy);
1416                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1417                                 continue;
1418                         mode->num_channels++;
1419                 }
1420
1421                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1422                 if (!mode->channels)
1423                         return NL_SKIP;
1424
1425                 idx = 0;
1426
1427                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1428                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1429                                   nla_len(nl_freq), freq_policy);
1430                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1431                                 continue;
1432
1433                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1434                         mode->channels[idx].flag |= HOSTAPD_CHAN_W_SCAN |
1435                                                     HOSTAPD_CHAN_W_ACTIVE_SCAN |
1436                                                     HOSTAPD_CHAN_W_IBSS;
1437
1438                         if (!mode_is_set) {
1439                                 /* crude heuristic */
1440                                 if (mode->channels[idx].freq < 4000)
1441                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1442                                 else
1443                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1444                                 mode_is_set = 1;
1445                         }
1446
1447                         /* crude heuristic */
1448                         if (mode->channels[idx].freq < 4000)
1449                                 if (mode->channels[idx].freq == 2848)
1450                                         mode->channels[idx].chan = 14;
1451                                 else
1452                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1453                         else
1454                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1455
1456                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1457                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_SCAN;
1458                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1459                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_ACTIVE_SCAN;
1460                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1461                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_IBSS;
1462                         idx++;
1463                 }
1464
1465                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1466                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1467                                   nla_len(nl_rate), rate_policy);
1468                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1469                                 continue;
1470                         mode->num_rates++;
1471                 }
1472
1473                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1474                 if (!mode->rates)
1475                         return NL_SKIP;
1476
1477                 idx = 0;
1478
1479                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1480                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1481                                   nla_len(nl_rate), rate_policy);
1482                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1483                                 continue;
1484                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1485
1486                         /* crude heuristic */
1487                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1488                             mode->rates[idx].rate > 200)
1489                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1490
1491                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1492                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1493
1494                         idx++;
1495                 }
1496         }
1497
1498         phy_info->error = 0;
1499
1500         return NL_SKIP;
1501 }
1502
1503 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
1504                                                          u16 *num_modes,
1505                                                          u16 *flags)
1506 {
1507         struct i802_driver_data *drv = priv;
1508         struct nl_msg *msg;
1509         int err = -1;
1510         struct nl_cb *cb = NULL;
1511         int finished = 0;
1512         struct phy_info_arg result = {
1513                 .num_modes = num_modes,
1514                 .modes = NULL,
1515                 .error = 1,
1516         };
1517
1518         *num_modes = 0;
1519         *flags = 0;
1520
1521         msg = nlmsg_alloc();
1522         if (!msg)
1523                 return NULL;
1524
1525         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1526                     0, NL80211_CMD_GET_WIPHY, 0);
1527
1528         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1529
1530         cb = nl_cb_clone(drv->nl_cb);
1531         if (!cb)
1532                 goto out;
1533
1534         if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
1535                 goto out;
1536
1537         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, phy_info_handler, &result);
1538         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
1539
1540         err = nl_recvmsgs(drv->nl_handle, cb);
1541
1542         if (!finished)
1543                 err = nl_wait_for_ack(drv->nl_handle);
1544
1545         if (err < 0 || result.error) {
1546                 hostapd_free_hw_features(result.modes, *num_modes);
1547                 result.modes = NULL;
1548         }
1549
1550  out:
1551         nl_cb_put(cb);
1552  nla_put_failure:
1553         if (err)
1554                 fprintf(stderr, "failed to get information: %d\n", err);
1555         nlmsg_free(msg);
1556         return result.modes;
1557 }
1558
1559
1560 static int i802_set_sta_vlan(void *priv, const u8 *addr,
1561                              const char *ifname, int vlan_id)
1562 {
1563         struct i802_driver_data *drv = priv;
1564         struct nl_msg *msg;
1565         int ret = -1;
1566
1567         msg = nlmsg_alloc();
1568         if (!msg)
1569                 goto out;
1570
1571         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1572                     0, NL80211_CMD_SET_STATION, 0);
1573
1574         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1575                     if_nametoindex(drv->iface));
1576         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1577         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1578                     if_nametoindex(ifname));
1579
1580         ret = 0;
1581
1582         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1583             (errno = nl_wait_for_ack(drv->nl_handle) < 0)) {
1584                 ret = -1;
1585         }
1586
1587  nla_put_failure:
1588         nlmsg_free(msg);
1589
1590  out:
1591         return ret;
1592 }
1593
1594
1595 static void handle_unknown_sta(struct hostapd_data *hapd, u8 *ta)
1596 {
1597         struct sta_info *sta;
1598
1599         sta = ap_get_sta(hapd, ta);
1600         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
1601                 printf("Data/PS-poll frame from not associated STA "
1602                        MACSTR "\n", MAC2STR(ta));
1603                 if (sta && (sta->flags & WLAN_STA_AUTH))
1604                         hostapd_sta_disassoc(
1605                                 hapd, ta,
1606                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1607                 else
1608                         hostapd_sta_deauth(
1609                                 hapd, ta,
1610                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1611         }
1612 }
1613
1614
1615 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
1616                                int ok)
1617 {
1618         struct ieee80211_hdr *hdr;
1619         u16 fc, type, stype;
1620         struct sta_info *sta;
1621
1622         hdr = (struct ieee80211_hdr *) buf;
1623         fc = le_to_host16(hdr->frame_control);
1624
1625         type = WLAN_FC_GET_TYPE(fc);
1626         stype = WLAN_FC_GET_STYPE(fc);
1627
1628         switch (type) {
1629         case WLAN_FC_TYPE_MGMT:
1630                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
1631                            ok ? "ACK" : "fail");
1632                 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
1633                 break;
1634         case WLAN_FC_TYPE_CTRL:
1635                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
1636                            ok ? "ACK" : "fail");
1637                 break;
1638         case WLAN_FC_TYPE_DATA:
1639                 wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
1640                            ok ? "ACK" : "fail");
1641                 sta = ap_get_sta(hapd, hdr->addr1);
1642                 if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
1643                         wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
1644                                    "activity poll", MAC2STR(sta->addr),
1645                                    ok ? "ACKed" : "did not ACK");
1646                         if (ok)
1647                                 sta->flags &= ~WLAN_STA_PENDING_POLL;
1648                 }
1649                 if (sta)
1650                         ieee802_1x_tx_status(hapd, sta, buf, len, ok);
1651                 break;
1652         default:
1653                 printf("unknown TX callback frame type %d\n", type);
1654                 break;
1655         }
1656 }
1657
1658
1659 static void handle_frame(struct hostapd_iface *iface, u8 *buf, size_t len,
1660                          struct hostapd_frame_info *hfi,
1661                          enum ieee80211_msg_type msg_type)
1662 {
1663         struct ieee80211_hdr *hdr;
1664         u16 fc, type, stype;
1665         size_t data_len = len;
1666         struct hostapd_data *hapd = NULL;
1667         int broadcast_bssid = 0;
1668         size_t i;
1669         u8 *bssid;
1670
1671         /*
1672          * PS-Poll frames are 16 bytes. All other frames are
1673          * 24 bytes or longer.
1674          */
1675         if (len < 16)
1676                 return;
1677
1678         hdr = (struct ieee80211_hdr *) buf;
1679         fc = le_to_host16(hdr->frame_control);
1680
1681         type = WLAN_FC_GET_TYPE(fc);
1682         stype = WLAN_FC_GET_STYPE(fc);
1683
1684         switch (type) {
1685         case WLAN_FC_TYPE_DATA:
1686                 if (len < 24)
1687                         return;
1688                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
1689                 case WLAN_FC_TODS:
1690                         bssid = hdr->addr1;
1691                         break;
1692                 default:
1693                         /* discard */
1694                         return;
1695                 }
1696                 break;
1697         case WLAN_FC_TYPE_CTRL:
1698                 /* discard non-ps-poll frames */
1699                 if (stype != WLAN_FC_STYPE_PSPOLL)
1700                         return;
1701                 bssid = hdr->addr1;
1702                 break;
1703         case WLAN_FC_TYPE_MGMT:
1704                 bssid = hdr->addr3;
1705                 break;
1706         default:
1707                 /* discard */
1708                 return;
1709         }
1710
1711         /* find interface frame belongs to */
1712         for (i = 0; i < iface->num_bss; i++) {
1713                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
1714                         hapd = iface->bss[i];
1715                         break;
1716                 }
1717         }
1718
1719         if (hapd == NULL) {
1720                 hapd = iface->bss[0];
1721
1722                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
1723                     bssid[2] != 0xff || bssid[3] != 0xff ||
1724                     bssid[4] != 0xff || bssid[5] != 0xff) {
1725                         /*
1726                          * Unknown BSSID - drop frame if this is not from
1727                          * passive scanning or a beacon (at least ProbeReq
1728                          * frames to other APs may be allowed through RX
1729                          * filtering in the wlan hw/driver)
1730                          */
1731                         if ((type != WLAN_FC_TYPE_MGMT ||
1732                              stype != WLAN_FC_STYPE_BEACON))
1733                                 return;
1734                 } else
1735                         broadcast_bssid = 1;
1736         }
1737
1738         switch (msg_type) {
1739         case ieee80211_msg_normal:
1740                 /* continue processing */
1741                 break;
1742         case ieee80211_msg_tx_callback_ack:
1743                 handle_tx_callback(hapd, buf, data_len, 1);
1744                 return;
1745         case ieee80211_msg_tx_callback_fail:
1746                 handle_tx_callback(hapd, buf, data_len, 0);
1747                 return;
1748         }
1749
1750         switch (type) {
1751         case WLAN_FC_TYPE_MGMT:
1752                 if (stype != WLAN_FC_STYPE_BEACON &&
1753                     stype != WLAN_FC_STYPE_PROBE_REQ)
1754                         wpa_printf(MSG_MSGDUMP, "MGMT");
1755                 if (broadcast_bssid) {
1756                         for (i = 0; i < iface->num_bss; i++)
1757                                 ieee802_11_mgmt(iface->bss[i], buf, data_len,
1758                                                 stype, hfi);
1759                 } else
1760                         ieee802_11_mgmt(hapd, buf, data_len, stype, hfi);
1761                 break;
1762         case WLAN_FC_TYPE_CTRL:
1763                 /* can only get here with PS-Poll frames */
1764                 wpa_printf(MSG_DEBUG, "CTRL");
1765                 handle_unknown_sta(hapd, hdr->addr2);
1766                 break;
1767         case WLAN_FC_TYPE_DATA:
1768                 wpa_printf(MSG_DEBUG, "DATA");
1769                 handle_unknown_sta(hapd, hdr->addr2);
1770                 break;
1771         }
1772 }
1773
1774
1775 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
1776 {
1777         struct i802_driver_data *drv = eloop_ctx;
1778         struct hostapd_data *hapd = drv->hapd;
1779         struct sockaddr_ll lladdr;
1780         unsigned char buf[3000];
1781         int len;
1782         socklen_t fromlen = sizeof(lladdr);
1783
1784         len = recvfrom(sock, buf, sizeof(buf), 0,
1785                        (struct sockaddr *)&lladdr, &fromlen);
1786         if (len < 0) {
1787                 perror("recv");
1788                 return;
1789         }
1790
1791         if (have_ifidx(drv, lladdr.sll_ifindex))
1792                 ieee802_1x_receive(hapd, lladdr.sll_addr, buf, len);
1793 }
1794
1795
1796 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1797 {
1798         struct i802_driver_data *drv = eloop_ctx;
1799         int len;
1800         unsigned char buf[3000];
1801         struct hostapd_data *hapd = drv->hapd;
1802         struct ieee80211_radiotap_iterator iter;
1803         int ret;
1804         struct hostapd_frame_info hfi;
1805         int injected = 0, failed = 0, msg_type, rxflags = 0;
1806
1807         len = recv(sock, buf, sizeof(buf), 0);
1808         if (len < 0) {
1809                 perror("recv");
1810                 return;
1811         }
1812
1813         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
1814                 printf("received invalid radiotap frame\n");
1815                 return;
1816         }
1817
1818         memset(&hfi, 0, sizeof(hfi));
1819
1820         while (1) {
1821                 ret = ieee80211_radiotap_iterator_next(&iter);
1822                 if (ret == -ENOENT)
1823                         break;
1824                 if (ret) {
1825                         printf("received invalid radiotap frame (%d)\n", ret);
1826                         return;
1827                 }
1828                 switch (iter.this_arg_index) {
1829                 case IEEE80211_RADIOTAP_FLAGS:
1830                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1831                                 len -= 4;
1832                         break;
1833                 case IEEE80211_RADIOTAP_RX_FLAGS:
1834                         rxflags = 1;
1835                         break;
1836                 case IEEE80211_RADIOTAP_TX_FLAGS:
1837                         injected = 1;
1838                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
1839                                         IEEE80211_RADIOTAP_F_TX_FAIL;
1840                         break;
1841                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1842                         break;
1843                 case IEEE80211_RADIOTAP_CHANNEL:
1844                         /* TODO convert from freq/flags to channel number
1845                         hfi.channel = XXX;
1846                         hfi.phytype = XXX;
1847                          */
1848                         break;
1849                 case IEEE80211_RADIOTAP_RATE:
1850                         hfi.datarate = *iter.this_arg * 5;
1851                         break;
1852                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1853                         hfi.ssi_signal = *iter.this_arg;
1854                         break;
1855                 }
1856         }
1857
1858         if (rxflags && injected)
1859                 return;
1860
1861         if (!injected)
1862                 msg_type = ieee80211_msg_normal;
1863         else if (failed)
1864                 msg_type = ieee80211_msg_tx_callback_fail;
1865         else
1866                 msg_type = ieee80211_msg_tx_callback_ack;
1867
1868         handle_frame(hapd->iface, buf + iter.max_length,
1869                      len - iter.max_length, &hfi, msg_type);
1870 }
1871
1872
1873 static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
1874 {
1875         char buf[IFNAMSIZ];
1876         struct sockaddr_ll ll;
1877         int optval;
1878         socklen_t optlen;
1879
1880         snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
1881         buf[IFNAMSIZ - 1] = '\0';
1882
1883         drv->monitor_ifidx =
1884                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
1885
1886         if (drv->monitor_ifidx < 0)
1887                 return -1;
1888
1889         if (hostapd_set_iface_flags(drv, buf, 1))
1890                 goto error;
1891
1892         memset(&ll, 0, sizeof(ll));
1893         ll.sll_family = AF_PACKET;
1894         ll.sll_ifindex = drv->monitor_ifidx;
1895         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1896         if (drv->monitor_sock < 0) {
1897                 perror("socket[PF_PACKET,SOCK_RAW]");
1898                 goto error;
1899         }
1900
1901         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1902                  sizeof(ll)) < 0) {
1903                 perror("monitor socket bind");
1904                 goto error;
1905         }
1906
1907         optlen = sizeof(optval);
1908         optval = 20;
1909         if (setsockopt
1910             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1911                 perror("Failed to set socket priority");
1912                 goto error;
1913         }
1914
1915         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1916                                      drv, NULL)) {
1917                 printf("Could not register monitor read socket\n");
1918                 goto error;
1919         }
1920
1921         return 0;
1922  error:
1923         nl80211_remove_iface(drv, drv->monitor_ifidx);
1924         return -1;
1925 }
1926
1927
1928 static int nl80211_set_master_mode(struct i802_driver_data *drv,
1929                                    const char *ifname)
1930 {
1931         struct nl_msg *msg;
1932
1933         msg = nlmsg_alloc();
1934         if (!msg)
1935                 return -1;
1936
1937         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1938                     0, NL80211_CMD_SET_INTERFACE, 0);
1939         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1940                     if_nametoindex(ifname));
1941         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
1942
1943         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1944             nl_wait_for_ack(drv->nl_handle) < 0) {
1945  nla_put_failure:
1946                 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
1947                            "mode.", ifname);
1948                 nlmsg_free(msg);
1949                 return -1;
1950         }
1951
1952         nlmsg_free(msg);
1953
1954         return 0;
1955 }
1956
1957
1958 static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
1959 {
1960         struct ifreq ifr;
1961         struct sockaddr_ll addr;
1962
1963         drv->ioctl_sock = -1;
1964
1965         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1966         if (drv->ioctl_sock < 0) {
1967                 perror("socket[PF_INET,SOCK_DGRAM]");
1968                 return -1;
1969         }
1970
1971         /* start listening for EAPOL on the default AP interface */
1972         add_ifidx(drv, if_nametoindex(drv->iface));
1973
1974         if (hostapd_set_iface_flags(drv, drv->iface, 0))
1975                 return -1;
1976
1977         if (bssid) {
1978                 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
1979                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
1980                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1981
1982                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
1983                         perror("ioctl(SIOCSIFHWADDR)");
1984                         return -1;
1985                 }
1986         }
1987
1988         /*
1989          * initialise generic netlink and nl80211
1990          */
1991         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1992         if (!drv->nl_cb) {
1993                 printf("Failed to allocate netlink callbacks.\n");
1994                 return -1;
1995         }
1996
1997         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1998         if (!drv->nl_handle) {
1999                 printf("Failed to allocate netlink handle.\n");
2000                 return -1;
2001         }
2002
2003         if (genl_connect(drv->nl_handle)) {
2004                 printf("Failed to connect to generic netlink.\n");
2005                 return -1;
2006         }
2007
2008         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
2009         if (!drv->nl_cache) {
2010                 printf("Failed to allocate generic netlink cache.\n");
2011                 return -1;
2012         }
2013
2014         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
2015         if (!drv->nl80211) {
2016                 printf("nl80211 not found.\n");
2017                 return -1;
2018         }
2019
2020         /* Initialise a monitor interface */
2021         if (nl80211_create_monitor_interface(drv))
2022                 return -1;
2023
2024         if (nl80211_set_master_mode(drv, drv->iface))
2025                 return -1;
2026
2027         if (hostapd_set_iface_flags(drv, drv->iface, 1))
2028                 return -1;
2029
2030         memset(&addr, 0, sizeof(addr));
2031         addr.sll_family = AF_PACKET;
2032         addr.sll_ifindex = ifr.ifr_ifindex;
2033         wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
2034                    addr.sll_ifindex);
2035
2036         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
2037         if (drv->eapol_sock < 0) {
2038                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
2039                 return -1;
2040         }
2041
2042         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
2043         {
2044                 printf("Could not register read socket for eapol\n");
2045                 return -1;
2046         }
2047
2048         memset(&ifr, 0, sizeof(ifr));
2049         os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
2050         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
2051                 perror("ioctl(SIOCGIFHWADDR)");
2052                 return -1;
2053         }
2054
2055         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
2056                 printf("Invalid HW-addr family 0x%04x\n",
2057                        ifr.ifr_hwaddr.sa_family);
2058                 return -1;
2059         }
2060         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
2061
2062         return 0;
2063 }
2064
2065
2066 static int i802_get_inact_sec(void *priv, const u8 *addr)
2067 {
2068         struct hostap_sta_driver_data data;
2069         int ret;
2070
2071         data.inactive_msec = (unsigned long) -1;
2072         ret = i802_read_sta_data(priv, &data, addr);
2073         if (ret || data.inactive_msec == (unsigned long) -1)
2074                 return -1;
2075         return data.inactive_msec / 1000;
2076 }
2077
2078
2079 static int i802_sta_clear_stats(void *priv, const u8 *addr)
2080 {
2081 #if 0
2082         /* TODO */
2083 #endif
2084         return 0;
2085 }
2086
2087
2088 static void
2089 hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
2090                                        char *custom)
2091 {
2092         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
2093
2094         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
2095                 char *pos;
2096                 u8 addr[ETH_ALEN];
2097                 pos = strstr(custom, "addr=");
2098                 if (pos == NULL) {
2099                         wpa_printf(MSG_DEBUG,
2100                                    "MLME-MICHAELMICFAILURE.indication "
2101                                    "without sender address ignored");
2102                         return;
2103                 }
2104                 pos += 5;
2105                 if (hwaddr_aton(pos, addr) == 0) {
2106                         ieee80211_michael_mic_failure(drv->hapd, addr, 1);
2107                 } else {
2108                         wpa_printf(MSG_DEBUG,
2109                                    "MLME-MICHAELMICFAILURE.indication "
2110                                    "with invalid MAC address");
2111                 }
2112         }
2113 }
2114
2115
2116 static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
2117                                             char *data, int len)
2118 {
2119         struct iw_event iwe_buf, *iwe = &iwe_buf;
2120         char *pos, *end, *custom, *buf;
2121
2122         pos = data;
2123         end = data + len;
2124
2125         while (pos + IW_EV_LCP_LEN <= end) {
2126                 /* Event data may be unaligned, so make a local, aligned copy
2127                  * before processing. */
2128                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2129                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
2130                            iwe->cmd, iwe->len);
2131                 if (iwe->len <= IW_EV_LCP_LEN)
2132                         return;
2133
2134                 custom = pos + IW_EV_POINT_LEN;
2135                 if (drv->we_version > 18 &&
2136                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
2137                      iwe->cmd == IWEVCUSTOM)) {
2138                         /* WE-19 removed the pointer from struct iw_point */
2139                         char *dpos = (char *) &iwe_buf.u.data.length;
2140                         int dlen = dpos - (char *) &iwe_buf;
2141                         memcpy(dpos, pos + IW_EV_LCP_LEN,
2142                                sizeof(struct iw_event) - dlen);
2143                 } else {
2144                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2145                         custom += IW_EV_POINT_OFF;
2146                 }
2147
2148                 switch (iwe->cmd) {
2149                 case IWEVCUSTOM:
2150                         if (custom + iwe->u.data.length > end)
2151                                 return;
2152                         buf = malloc(iwe->u.data.length + 1);
2153                         if (buf == NULL)
2154                                 return;
2155                         memcpy(buf, custom, iwe->u.data.length);
2156                         buf[iwe->u.data.length] = '\0';
2157                         hostapd_wireless_event_wireless_custom(drv, buf);
2158                         free(buf);
2159                         break;
2160                 }
2161
2162                 pos += iwe->len;
2163         }
2164 }
2165
2166
2167 static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
2168                                                struct nlmsghdr *h, int len)
2169 {
2170         struct ifinfomsg *ifi;
2171         int attrlen, nlmsg_len, rta_len;
2172         struct rtattr *attr;
2173
2174         if (len < (int) sizeof(*ifi))
2175                 return;
2176
2177         ifi = NLMSG_DATA(h);
2178
2179         /* TODO: use ifi->ifi_index to filter out wireless events from other
2180          * interfaces */
2181
2182         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2183
2184         attrlen = h->nlmsg_len - nlmsg_len;
2185         if (attrlen < 0)
2186                 return;
2187
2188         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
2189
2190         rta_len = RTA_ALIGN(sizeof(struct rtattr));
2191         while (RTA_OK(attr, attrlen)) {
2192                 if (attr->rta_type == IFLA_WIRELESS) {
2193                         hostapd_wireless_event_wireless(
2194                                 drv, ((char *) attr) + rta_len,
2195                                 attr->rta_len - rta_len);
2196                 }
2197                 attr = RTA_NEXT(attr, attrlen);
2198         }
2199 }
2200
2201
2202 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
2203                                            void *sock_ctx)
2204 {
2205         char buf[256];
2206         int left;
2207         struct sockaddr_nl from;
2208         socklen_t fromlen;
2209         struct nlmsghdr *h;
2210         struct i802_driver_data *drv = eloop_ctx;
2211
2212         fromlen = sizeof(from);
2213         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
2214                         (struct sockaddr *) &from, &fromlen);
2215         if (left < 0) {
2216                 if (errno != EINTR && errno != EAGAIN)
2217                         perror("recvfrom(netlink)");
2218                 return;
2219         }
2220
2221         h = (struct nlmsghdr *) buf;
2222         while (left >= (int) sizeof(*h)) {
2223                 int len, plen;
2224
2225                 len = h->nlmsg_len;
2226                 plen = len - sizeof(*h);
2227                 if (len > left || plen < 0) {
2228                         printf("Malformed netlink message: "
2229                                "len=%d left=%d plen=%d\n",
2230                                len, left, plen);
2231                         break;
2232                 }
2233
2234                 switch (h->nlmsg_type) {
2235                 case RTM_NEWLINK:
2236                         hostapd_wireless_event_rtm_newlink(drv, h, plen);
2237                         break;
2238                 }
2239
2240                 len = NLMSG_ALIGN(len);
2241                 left -= len;
2242                 h = (struct nlmsghdr *) ((char *) h + len);
2243         }
2244
2245         if (left > 0) {
2246                 printf("%d extra bytes in the end of netlink message\n", left);
2247         }
2248 }
2249
2250
2251 static int hostap_get_we_version(struct i802_driver_data *drv)
2252 {
2253         struct iw_range *range;
2254         struct iwreq iwr;
2255         int minlen;
2256         size_t buflen;
2257
2258         drv->we_version = 0;
2259
2260         /*
2261          * Use larger buffer than struct iw_range in order to allow the
2262          * structure to grow in the future.
2263          */
2264         buflen = sizeof(struct iw_range) + 500;
2265         range = os_zalloc(buflen);
2266         if (range == NULL)
2267                 return -1;
2268
2269         memset(&iwr, 0, sizeof(iwr));
2270         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2271         iwr.u.data.pointer = (caddr_t) range;
2272         iwr.u.data.length = buflen;
2273
2274         minlen = ((char *) &range->enc_capa) - (char *) range +
2275                 sizeof(range->enc_capa);
2276
2277         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2278                 perror("ioctl[SIOCGIWRANGE]");
2279                 free(range);
2280                 return -1;
2281         } else if (iwr.u.data.length >= minlen &&
2282                    range->we_version_compiled >= 18) {
2283                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2284                            "WE(source)=%d enc_capa=0x%x",
2285                            range->we_version_compiled,
2286                            range->we_version_source,
2287                            range->enc_capa);
2288                 drv->we_version = range->we_version_compiled;
2289         }
2290
2291         free(range);
2292         return 0;
2293 }
2294
2295
2296 static int i802_wireless_event_init(void *priv)
2297 {
2298         struct i802_driver_data *drv = priv;
2299         int s;
2300         struct sockaddr_nl local;
2301
2302         hostap_get_we_version(drv);
2303
2304         drv->wext_sock = -1;
2305
2306         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2307         if (s < 0) {
2308                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2309                 return -1;
2310         }
2311
2312         memset(&local, 0, sizeof(local));
2313         local.nl_family = AF_NETLINK;
2314         local.nl_groups = RTMGRP_LINK;
2315         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2316                 perror("bind(netlink)");
2317                 close(s);
2318                 return -1;
2319         }
2320
2321         eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
2322                                  NULL);
2323         drv->wext_sock = s;
2324
2325         return 0;
2326 }
2327
2328
2329 static void i802_wireless_event_deinit(void *priv)
2330 {
2331         struct i802_driver_data *drv = priv;
2332         if (drv->wext_sock < 0)
2333                 return;
2334         eloop_unregister_read_sock(drv->wext_sock);
2335         close(drv->wext_sock);
2336 }
2337
2338
2339 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
2340 {
2341         struct i802_driver_data *drv = priv;
2342         struct ieee80211_mgmt mgmt;
2343
2344         memset(&mgmt, 0, sizeof(mgmt));
2345         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2346                                           WLAN_FC_STYPE_DEAUTH);
2347         memcpy(mgmt.da, addr, ETH_ALEN);
2348         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2349         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2350         mgmt.u.deauth.reason_code = host_to_le16(reason);
2351         return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2352                                       sizeof(mgmt.u.deauth), 0);
2353 }
2354
2355
2356 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
2357 {
2358         struct i802_driver_data *drv = priv;
2359         struct ieee80211_mgmt mgmt;
2360
2361         memset(&mgmt, 0, sizeof(mgmt));
2362         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2363                                           WLAN_FC_STYPE_DISASSOC);
2364         memcpy(mgmt.da, addr, ETH_ALEN);
2365         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2366         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2367         mgmt.u.disassoc.reason_code = host_to_le16(reason);
2368         return  i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2369                                        sizeof(mgmt.u.disassoc), 0);
2370 }
2371
2372
2373 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
2374 {
2375         struct i802_driver_data *drv;
2376
2377         drv = os_zalloc(sizeof(struct i802_driver_data));
2378         if (drv == NULL) {
2379                 printf("Could not allocate memory for i802 driver data\n");
2380                 return NULL;
2381         }
2382
2383         drv->hapd = hapd;
2384         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
2385
2386         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
2387         drv->if_indices = drv->default_if_indices;
2388         drv->bridge = if_nametoindex(hapd->conf->bridge);
2389
2390         if (i802_init_sockets(drv, bssid))
2391                 goto failed;
2392
2393         return drv;
2394
2395 failed:
2396         free(drv);
2397         return NULL;
2398 }
2399
2400
2401 static void *i802_init(struct hostapd_data *hapd)
2402 {
2403         return i802_init_bssid(hapd, NULL);
2404 }
2405
2406
2407 static void i802_deinit(void *priv)
2408 {
2409         struct i802_driver_data *drv = priv;
2410
2411         i802_del_beacon(drv);
2412
2413         /* remove monitor interface */
2414         nl80211_remove_iface(drv, drv->monitor_ifidx);
2415
2416         (void) hostapd_set_iface_flags(drv, drv->iface, 0);
2417
2418         if (drv->monitor_sock >= 0) {
2419                 eloop_unregister_read_sock(drv->monitor_sock);
2420                 close(drv->monitor_sock);
2421         }
2422         if (drv->ioctl_sock >= 0)
2423                 close(drv->ioctl_sock);
2424         if (drv->eapol_sock >= 0) {
2425                 eloop_unregister_read_sock(drv->eapol_sock);
2426                 close(drv->eapol_sock);
2427         }
2428
2429         genl_family_put(drv->nl80211);
2430         nl_cache_free(drv->nl_cache);
2431         nl_handle_destroy(drv->nl_handle);
2432         nl_cb_put(drv->nl_cb);
2433
2434         if (drv->if_indices != drv->default_if_indices)
2435                 free(drv->if_indices);
2436
2437         free(drv);
2438 }
2439
2440
2441 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2442         .name = "nl80211",
2443         .init = i802_init,
2444         .init_bssid = i802_init_bssid,
2445         .deinit = i802_deinit,
2446         .wireless_event_init = i802_wireless_event_init,
2447         .wireless_event_deinit = i802_wireless_event_deinit,
2448         .set_ieee8021x = i802_set_ieee8021x,
2449         .set_privacy = i802_set_privacy,
2450         .set_encryption = i802_set_encryption,
2451         .get_seqnum = i802_get_seqnum,
2452         .flush = i802_flush,
2453         .read_sta_data = i802_read_sta_data,
2454         .send_eapol = i802_send_eapol,
2455         .sta_set_flags = i802_sta_set_flags,
2456         .sta_deauth = i802_sta_deauth,
2457         .sta_disassoc = i802_sta_disassoc,
2458         .sta_remove = i802_sta_remove,
2459         .set_ssid = i802_set_ssid,
2460         .send_mgmt_frame = i802_send_mgmt_frame,
2461         .sta_add2 = i802_sta_add2,
2462         .get_inact_sec = i802_get_inact_sec,
2463         .sta_clear_stats = i802_sta_clear_stats,
2464         .set_freq = i802_set_freq,
2465         .set_rts = i802_set_rts,
2466         .get_rts = i802_get_rts,
2467         .set_frag = i802_set_frag,
2468         .get_frag = i802_get_frag,
2469         .set_retry = i802_set_retry,
2470         .get_retry = i802_get_retry,
2471         .set_rate_sets = i802_set_rate_sets,
2472         .set_channel_flag = i802_set_channel_flag,
2473         .set_regulatory_domain = i802_set_regulatory_domain,
2474         .set_beacon = i802_set_beacon,
2475         .set_internal_bridge = i802_set_internal_bridge,
2476         .set_beacon_int = i802_set_beacon_int,
2477         .set_dtim_period = i802_set_dtim_period,
2478         .set_cts_protect = i802_set_cts_protect,
2479         .set_preamble = i802_set_preamble,
2480         .set_short_slot_time = i802_set_short_slot_time,
2481         .set_tx_queue_params = i802_set_tx_queue_params,
2482         .bss_add = i802_bss_add,
2483         .bss_remove = i802_bss_remove,
2484         .if_add = i802_if_add,
2485         .if_update = i802_if_update,
2486         .if_remove = i802_if_remove,
2487         .get_hw_feature_data = i802_get_hw_feature_data,
2488         .set_sta_vlan = i802_set_sta_vlan,
2489 };