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 /* nl80211 code */
 139 static int ack_handler(struct nl_msg *msg, void *arg)
 140 {
 141         int *err = arg;
 142         *err = 0;
 143         return NL_STOP;
 144 }
 145
 146 static int finish_handler(struct nl_msg *msg, void *arg)
 147 {
 148         int *ret = arg;
 149         *ret = 0;
 150         return NL_SKIP;
 151 }
 152
 153 static int error_handler(struct sockaddr_nl *nla, struct nlmsgerr *err,
 154                          void *arg)
 155 {
 156         int *ret = arg;
 157         *ret = err->error;
 158         return NL_SKIP;
 159 }
 160
 161 static int send_and_recv_msgs(struct i802_driver_data *drv,
 162                               struct nl_msg *msg,
 163                               int (*valid_handler)(struct nl_msg *, void *),
 164                               void *valid_data)
 165 {
 166         struct nl_cb *cb;
 167         int err = -ENOMEM;
 168
 169         cb = nl_cb_clone(drv->nl_cb);
 170         if (!cb)
 171                 goto out;
 172
 173         err = nl_send_auto_complete(drv->nl_handle, msg);
 174         if (err < 0)
 175                 goto out;
 176
 177         err = 1;
 178
 179         nl_cb_err(cb, NL_CB_CUSTOM, error_handler, &err);
 180         nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, finish_handler, &err);
 181         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_handler, &err);
 182
 183         if (valid_handler)
 184                 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM,
 185                           valid_handler, valid_data);
 186
 187         while (err > 0)
 188                 nl_recvmsgs(drv->nl_handle, cb);
 189  out:
 190         nl_cb_put(cb);
 191         nlmsg_free(msg);
 192         return err;
 193 }
 194
 195 static int hostapd_set_iface_flags(struct i802_driver_data *drv,
 196                                    const char *ifname, int dev_up)
 197 {
 198         struct ifreq ifr;
 199
 200         if (drv->ioctl_sock < 0)
 201                 return -1;
 202
 203         memset(&ifr, 0, sizeof(ifr));
 204         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 205
 206         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 207                 perror("ioctl[SIOCGIFFLAGS]");
 208                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 209                            drv->iface);
 210                 return -1;
 211         }
 212
 213         if (dev_up)
 214                 ifr.ifr_flags |= IFF_UP;
 215         else
 216                 ifr.ifr_flags &= ~IFF_UP;
 217
 218         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 219                 perror("ioctl[SIOCSIFFLAGS]");
 220                 return -1;
 221         }
 222
 223         return 0;
 224 }
 225
 226
 227 static int nl_set_encr(int ifindex, struct i802_driver_data *drv,
 228                        const char *alg, const u8 *addr, int idx, const u8 *key,
 229                        size_t key_len, int txkey)
 230 {
 231         struct nl_msg *msg;
 232         int ret;
 233
 234         msg = nlmsg_alloc();
 235         if (!msg)
 236                 return -ENOMEM;
 237
 238         if (strcmp(alg, "none") == 0) {
 239                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 240                             0, NL80211_CMD_DEL_KEY, 0);
 241         } else {
 242                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 243                             0, NL80211_CMD_NEW_KEY, 0);
 244                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
 245                 if (strcmp(alg, "WEP") == 0) {
 246                         if (key_len == 5)
 247                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
 248                                             0x000FAC01);
 249                         else
 250                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
 251                                             0x000FAC05);
 252                 } else if (strcmp(alg, "TKIP") == 0)
 253                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
 254                 else if (strcmp(alg, "CCMP") == 0)
 255                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
 256                 else if (strcmp(alg, "IGTK") == 0)
 257                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
 258                 else {
 259                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
 260                                    "algorithm '%s'", __func__, alg);
 261                         nlmsg_free(msg);
 262                         return -1;
 263                 }
 264         }
 265
 266         if (addr)
 267                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 268         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 269         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
 270
 271         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 272         if (ret == -ENOENT)
 273                 ret = 0;
 274
 275         /*
 276          * If we failed or don't need to set the default TX key (below),
 277          * we're done here.
 278          */
 279         if (ret || !txkey || addr)
 280                 return ret;
 281
 282         msg = nlmsg_alloc();
 283         if (!msg)
 284                 return -ENOMEM;
 285
 286         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 287                     0, NL80211_CMD_SET_KEY, 0);
 288         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 289         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
 290 #ifdef NL80211_MFP_PENDING
 291         if (strcmp(alg, "IGTK") == 0)
 292                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
 293         else
 294                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
 295 #else /* NL80211_MFP_PENDING */
 296         NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
 297 #endif /* NL80211_MFP_PENDING */
 298
 299         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 300         if (ret == -ENOENT)
 301                 ret = 0;
 302         return ret;
 303  nla_put_failure:
 304         return -ENOBUFS;
 305 }
 306
 307
 308 static int i802_set_encryption(const char *iface, void *priv, const char *alg,
 309                                const u8 *addr, int idx, const u8 *key,
 310                                size_t key_len, int txkey)
 311 {
 312         struct i802_driver_data *drv = priv;
 313         int ret;
 314
 315         ret = nl_set_encr(if_nametoindex(iface), drv, alg, addr, idx, key,
 316                           key_len, txkey);
 317         if (ret < 0)
 318                 return ret;
 319
 320         if (strcmp(alg, "IGTK") == 0) {
 321                 ret = nl_set_encr(drv->monitor_ifidx, drv, alg, addr, idx, key,
 322                                   key_len, txkey);
 323         }
 324
 325         return ret;
 326 }
 327
 328
 329 static inline int min_int(int a, int b)
 330 {
 331         if (a < b)
 332                 return a;
 333         return b;
 334 }
 335
 336
 337 static int get_key_handler(struct nl_msg *msg, void *arg)
 338 {
 339         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 340         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 341
 342         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 343                   genlmsg_attrlen(gnlh, 0), NULL);
 344
 345         /*
 346          * TODO: validate the key index and mac address!
 347          * Otherwise, there's a race condition as soon as
 348          * the kernel starts sending key notifications.
 349          */
 350
 351         if (tb[NL80211_ATTR_KEY_SEQ])
 352                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 353                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
 354         return NL_SKIP;
 355 }
 356
 357
 358 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
 359                            int idx, u8 *seq)
 360 {
 361         struct i802_driver_data *drv = priv;
 362         struct nl_msg *msg;
 363
 364         msg = nlmsg_alloc();
 365         if (!msg)
 366                 return -ENOMEM;
 367
 368         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 369                     0, NL80211_CMD_GET_KEY, 0);
 370
 371         if (addr)
 372                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 373         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 374         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
 375
 376         memset(seq, 0, 6);
 377
 378         return send_and_recv_msgs(drv, msg, get_key_handler, seq);
 379  nla_put_failure:
 380         return -ENOBUFS;
 381 }
 382
 383
 384 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
 385                               int mode)
 386 {
 387 #ifdef NL80211_ATTR_BSS_BASIC_RATES
 388         struct i802_driver_data *drv = priv;
 389         struct nl_msg *msg;
 390         u8 rates[NL80211_MAX_SUPP_RATES];
 391         u8 rates_len = 0;
 392         int i;
 393
 394         msg = nlmsg_alloc();
 395         if (!msg)
 396                 return -ENOMEM;
 397
 398         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
 399                     NL80211_CMD_SET_BSS, 0);
 400
 401         for (i = 0; i < NL80211_MAX_SUPP_RATES && basic_rates[i] >= 0; i++)
 402                 rates[rates_len++] = basic_rates[i] / 5;
 403
 404         NLA_PUT(msg, NL80211_ATTR_BSS_BASIC_RATES, rates_len, rates);
 405
 406         /* TODO: multi-BSS support */
 407         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 408
 409         return send_and_recv_msgs(drv, msg, NULL, NULL);
 410  nla_put_failure:
 411         return -ENOBUFS;
 412 #else /* NL80211_ATTR_BSS_BASIC_RATES */
 413         return -1;
 414 #endif /* NL80211_ATTR_BSS_BASIC_RATES */
 415 }
 416
 417
 418 static int i802_send_frame(void *priv, const void *data, size_t len,
 419                            int encrypt, int flags)
 420 {
 421         __u8 rtap_hdr[] = {
 422                 0x00, 0x00, /* radiotap version */
 423                 0x0e, 0x00, /* radiotap length */
 424                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
 425                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
 426                 0x00,       /* padding */
 427                 0x00, 0x00, /* RX and TX flags to indicate that */
 428                 0x00, 0x00, /* this is the injected frame directly */
 429         };
 430         struct i802_driver_data *drv = priv;
 431         struct iovec iov[2] = {
 432                 {
 433                         .iov_base = &rtap_hdr,
 434                         .iov_len = sizeof(rtap_hdr),
 435                 },
 436                 {
 437                         .iov_base = (void*)data,
 438                         .iov_len = len,
 439                 }
 440         };
 441         struct msghdr msg = {
 442                 .msg_name = NULL,
 443                 .msg_namelen = 0,
 444                 .msg_iov = iov,
 445                 .msg_iovlen = 2,
 446                 .msg_control = NULL,
 447                 .msg_controllen = 0,
 448                 .msg_flags = 0,
 449         };
 450
 451         if (encrypt)
 452                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
 453
 454         return sendmsg(drv->monitor_sock, &msg, flags);
 455 }
 456
 457 static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
 458                                 int flags)
 459 {
 460         return i802_send_frame(priv, data, len, 1, flags);
 461 }
 462
 463 /* Set kernel driver on given frequency (MHz) */
 464 static int i802_set_freq2(void *priv, struct hostapd_freq_params *freq)
 465 {
 466 #ifdef NL80211_ATTR_WIPHY_FREQ
 467         struct i802_driver_data *drv = priv;
 468         struct nl_msg *msg;
 469
 470         msg = nlmsg_alloc();
 471         if (!msg)
 472                 return -1;
 473
 474         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
 475                     NL80211_CMD_SET_WIPHY, 0);
 476
 477         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 478         NLA_PUT_U32(msg, NL80211_ATTR_WIPHY_FREQ, freq->freq);
 479         switch (freq->sec_channel_offset) {
 480         case -1:
 481                 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET,
 482                            NL80211_SEC_CHAN_BELOW);
 483                 break;
 484         case 1:
 485                 NLA_PUT_U8(msg, NL80211_ATTR_WIPHY_SEC_CHAN_OFFSET,
 486                            NL80211_SEC_CHAN_ABOVE);
 487                 break;
 488         }
 489
 490         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
 491                 return 0;
 492  nla_put_failure:
 493         return -1;
 494 #else /* NL80211_ATTR_WIPHY_FREQ */
 495         struct i802_driver_data *drv = priv;
 496         struct iwreq iwr;
 497
 498         memset(&iwr, 0, sizeof(iwr));
 499         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 500         iwr.u.freq.m = freq->freq;
 501         iwr.u.freq.e = 6;
 502
 503         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 504                 perror("ioctl[SIOCSIWFREQ]");
 505                 return -1;
 506         }
 507
 508         return 0;
 509 #endif /* NL80211_ATTR_WIPHY_FREQ */
 510 }
 511
 512
 513 static int i802_set_rts(void *priv, int rts)
 514 {
 515         struct i802_driver_data *drv = priv;
 516         struct iwreq iwr;
 517
 518         memset(&iwr, 0, sizeof(iwr));
 519         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 520         iwr.u.rts.value = rts;
 521         iwr.u.rts.fixed = 1;
 522
 523         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
 524                 perror("ioctl[SIOCSIWRTS]");
 525                 return -1;
 526         }
 527
 528         return 0;
 529 }
 530
 531
 532 static int i802_get_rts(void *priv, int *rts)
 533 {
 534         struct i802_driver_data *drv = priv;
 535         struct iwreq iwr;
 536
 537         memset(&iwr, 0, sizeof(iwr));
 538         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 539
 540         if (ioctl(drv->ioctl_sock, SIOCGIWRTS, &iwr) < 0) {
 541                 perror("ioctl[SIOCGIWRTS]");
 542                 return -1;
 543         }
 544
 545         *rts = iwr.u.rts.value;
 546
 547         return 0;
 548 }
 549
 550
 551 static int i802_set_frag(void *priv, int frag)
 552 {
 553         struct i802_driver_data *drv = priv;
 554         struct iwreq iwr;
 555
 556         memset(&iwr, 0, sizeof(iwr));
 557         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 558         iwr.u.frag.value = frag;
 559         iwr.u.frag.fixed = 1;
 560
 561         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 562                 perror("ioctl[SIOCSIWFRAG]");
 563                 return -1;
 564         }
 565
 566         return 0;
 567 }
 568
 569
 570 static int i802_get_frag(void *priv, int *frag)
 571 {
 572         struct i802_driver_data *drv = priv;
 573         struct iwreq iwr;
 574
 575         memset(&iwr, 0, sizeof(iwr));
 576         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 577
 578         if (ioctl(drv->ioctl_sock, SIOCGIWFRAG, &iwr) < 0) {
 579                 perror("ioctl[SIOCGIWFRAG]");
 580                 return -1;
 581         }
 582
 583         *frag = iwr.u.frag.value;
 584
 585         return 0;
 586 }
 587
 588
 589 static int i802_set_retry(void *priv, int short_retry, int long_retry)
 590 {
 591         struct i802_driver_data *drv = priv;
 592         struct iwreq iwr;
 593
 594         memset(&iwr, 0, sizeof(iwr));
 595         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 596
 597         iwr.u.retry.value = short_retry;
 598         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 599         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 600                 perror("ioctl[SIOCSIWRETRY(short)]");
 601                 return -1;
 602         }
 603
 604         iwr.u.retry.value = long_retry;
 605         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 606         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 607                 perror("ioctl[SIOCSIWRETRY(long)]");
 608                 return -1;
 609         }
 610
 611         return 0;
 612 }
 613
 614
 615 static int i802_get_retry(void *priv, int *short_retry, int *long_retry)
 616 {
 617         struct i802_driver_data *drv = priv;
 618         struct iwreq iwr;
 619
 620         memset(&iwr, 0, sizeof(iwr));
 621         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 622
 623         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 624         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 625                 perror("ioctl[SIOCGIWFRAG(short)]");
 626                 return -1;
 627         }
 628         *short_retry = iwr.u.retry.value;
 629
 630         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 631         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 632                 perror("ioctl[SIOCGIWFRAG(long)]");
 633                 return -1;
 634         }
 635         *long_retry = iwr.u.retry.value;
 636
 637         return 0;
 638 }
 639
 640
 641 static int i802_flush(void *priv)
 642 {
 643         struct i802_driver_data *drv = priv;
 644         struct nl_msg *msg;
 645
 646         msg = nlmsg_alloc();
 647         if (!msg)
 648                 return -1;
 649
 650         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 651                     0, NL80211_CMD_DEL_STATION, 0);
 652
 653         /*
 654          * XXX: FIX! this needs to flush all VLANs too
 655          */
 656         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 657                     if_nametoindex(drv->iface));
 658
 659         return send_and_recv_msgs(drv, msg, NULL, NULL);
 660  nla_put_failure:
 661         return -ENOBUFS;
 662 }
 663
 664
 665 static int get_sta_handler(struct nl_msg *msg, void *arg)
 666 {
 667         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 668         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 669         struct hostap_sta_driver_data *data = arg;
 670         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
 671         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 672                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
 673                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
 674                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
 675         };
 676
 677         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 678                   genlmsg_attrlen(gnlh, 0), NULL);
 679
 680         /*
 681          * TODO: validate the interface and mac address!
 682          * Otherwise, there's a race condition as soon as
 683          * the kernel starts sending station notifications.
 684          */
 685
 686         if (!tb[NL80211_ATTR_STA_INFO]) {
 687                 wpa_printf(MSG_DEBUG, "sta stats missing!");
 688                 return NL_SKIP;
 689         }
 690         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
 691                              tb[NL80211_ATTR_STA_INFO],
 692                              stats_policy)) {
 693                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
 694                 return NL_SKIP;
 695         }
 696
 697         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
 698                 data->inactive_msec =
 699                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
 700         if (stats[NL80211_STA_INFO_RX_BYTES])
 701                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
 702         if (stats[NL80211_STA_INFO_TX_BYTES])
 703                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
 704
 705         return NL_SKIP;
 706 }
 707
 708 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
 709                               const u8 *addr)
 710 {
 711         struct i802_driver_data *drv = priv;
 712         struct nl_msg *msg;
 713
 714         msg = nlmsg_alloc();
 715         if (!msg)
 716                 return -ENOMEM;
 717
 718         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 719                     0, NL80211_CMD_GET_STATION, 0);
 720
 721         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 722         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 723
 724         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
 725  nla_put_failure:
 726         return -ENOBUFS;
 727 }
 728
 729
 730 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
 731                            size_t data_len, int encrypt, const u8 *own_addr)
 732 {
 733         struct i802_driver_data *drv = priv;
 734         struct ieee80211_hdr *hdr;
 735         size_t len;
 736         u8 *pos;
 737         int res;
 738 #if 0 /* FIX */
 739         int qos = sta->flags & WLAN_STA_WME;
 740 #else
 741         int qos = 0;
 742 #endif
 743
 744         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
 745                 data_len;
 746         hdr = os_zalloc(len);
 747         if (hdr == NULL) {
 748                 printf("malloc() failed for i802_send_data(len=%lu)\n",
 749                        (unsigned long) len);
 750                 return -1;
 751         }
 752
 753         hdr->frame_control =
 754                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 755         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
 756         if (encrypt)
 757                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
 758 #if 0 /* To be enabled if qos determination is added above */
 759         if (qos) {
 760                 hdr->frame_control |=
 761                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
 762         }
 763 #endif
 764
 765         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
 766         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
 767         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
 768         pos = (u8 *) (hdr + 1);
 769
 770 #if 0 /* To be enabled if qos determination is added above */
 771         if (qos) {
 772                 /* add an empty QoS header if needed */
 773                 pos[0] = 0;
 774                 pos[1] = 0;
 775                 pos += 2;
 776         }
 777 #endif
 778
 779         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
 780         pos += sizeof(rfc1042_header);
 781         WPA_PUT_BE16(pos, ETH_P_PAE);
 782         pos += 2;
 783         memcpy(pos, data, data_len);
 784
 785         res = i802_send_frame(drv, (u8 *) hdr, len, encrypt, 0);
 786         free(hdr);
 787
 788         if (res < 0) {
 789                 perror("i802_send_eapol: send");
 790                 printf("i802_send_eapol - packet len: %lu - failed\n",
 791                        (unsigned long) len);
 792         }
 793
 794         return res;
 795 }
 796
 797
 798 static int i802_sta_add2(const char *ifname, void *priv,
 799                          struct hostapd_sta_add_params *params)
 800 {
 801         struct i802_driver_data *drv = priv;
 802         struct nl_msg *msg;
 803         int ret = -ENOBUFS;
 804
 805         msg = nlmsg_alloc();
 806         if (!msg)
 807                 return -ENOMEM;
 808
 809         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 810                     0, NL80211_CMD_NEW_STATION, 0);
 811
 812         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 813                     if_nametoindex(drv->iface));
 814         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
 815         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
 816         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
 817                 params->supp_rates);
 818         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
 819                     params->listen_interval);
 820
 821 #ifdef CONFIG_IEEE80211N
 822 #ifdef NL80211_ATTR_HT_CAPABILITY
 823         if (params->ht_capabilities) {
 824                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
 825                         params->ht_capabilities->length,
 826                         &params->ht_capabilities->data);
 827         }
 828 #endif /* NL80211_ATTR_HT_CAPABILITY */
 829 #endif /* CONFIG_IEEE80211N */
 830
 831         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 832         if (ret == -EEXIST)
 833                 ret = 0;
 834  nla_put_failure:
 835         return ret;
 836 }
 837
 838
 839 static int i802_sta_remove(void *priv, const u8 *addr)
 840 {
 841         struct i802_driver_data *drv = priv;
 842         struct nl_msg *msg;
 843         int ret;
 844
 845         msg = nlmsg_alloc();
 846         if (!msg)
 847                 return -ENOMEM;
 848
 849         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 850                     0, NL80211_CMD_DEL_STATION, 0);
 851
 852         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 853                     if_nametoindex(drv->iface));
 854         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 855
 856         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 857         if (ret == -ENOENT)
 858                 return 0;
 859         return ret;
 860  nla_put_failure:
 861         return -ENOBUFS;
 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
 871         msg = nlmsg_alloc();
 872         if (!msg)
 873                 return -ENOMEM;
 874
 875         flags = nlmsg_alloc();
 876         if (!flags) {
 877                 nlmsg_free(msg);
 878                 return -ENOMEM;
 879         }
 880
 881         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 882                     0, NL80211_CMD_SET_STATION, 0);
 883
 884         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 885                     if_nametoindex(drv->iface));
 886         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 887
 888         if (total_flags & WLAN_STA_AUTHORIZED || !drv->ieee802_1x_active)
 889                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
 890
 891         if (total_flags & WLAN_STA_WME)
 892                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
 893
 894         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
 895                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
 896
 897 #ifdef NL80211_MFP_PENDING
 898         if (total_flags & WLAN_STA_MFP)
 899                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
 900 #endif /* NL80211_MFP_PENDING */
 901
 902         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
 903                 goto nla_put_failure;
 904
 905         nlmsg_free(flags);
 906
 907         return send_and_recv_msgs(drv, msg, NULL, NULL);
 908  nla_put_failure:
 909         nlmsg_free(flags);
 910         return -ENOBUFS;
 911 }
 912
 913
 914 static int i802_set_regulatory_domain(void *priv, unsigned int rd)
 915 {
 916         return -1;
 917 }
 918
 919
 920 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
 921                                     int cw_min, int cw_max, int burst_time)
 922 {
 923 #ifdef NL80211_ATTR_WIPHY_TXQ_PARAMS
 924         struct i802_driver_data *drv = priv;
 925         struct nl_msg *msg;
 926         struct nlattr *txq, *params;
 927
 928         msg = nlmsg_alloc();
 929         if (!msg)
 930                 return -1;
 931
 932         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 933                     0, NL80211_CMD_SET_WIPHY, 0);
 934
 935         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 936
 937         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
 938         if (!txq)
 939                 goto nla_put_failure;
 940
 941         /* We are only sending parameters for a single TXQ at a time */
 942         params = nla_nest_start(msg, 1);
 943         if (!params)
 944                 goto nla_put_failure;
 945
 946         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
 947         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
 948          * 32 usec, so need to convert the value here. */
 949         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
 950         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
 951         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
 952         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
 953
 954         nla_nest_end(msg, params);
 955
 956         nla_nest_end(msg, txq);
 957
 958         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
 959                 return 0;
 960  nla_put_failure:
 961         return -1;
 962 #else /* NL80211_ATTR_WIPHY_TXQ_PARAMS */
 963         return -1;
 964 #endif /* NL80211_ATTR_WIPHY_TXQ_PARAMS */
 965 }
 966
 967
 968 static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
 969 {
 970         struct nl_msg *msg;
 971
 972         /* stop listening for EAPOL on this interface */
 973         del_ifidx(drv, ifidx);
 974
 975         msg = nlmsg_alloc();
 976         if (!msg)
 977                 goto nla_put_failure;
 978
 979         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 980                     0, NL80211_CMD_DEL_INTERFACE, 0);
 981         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
 982
 983         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
 984                 return;
 985  nla_put_failure:
 986         printf("Failed to remove interface.\n");
 987 }
 988
 989
 990 static int nl80211_create_iface(struct i802_driver_data *drv,
 991                                 const char *ifname,
 992                                 enum nl80211_iftype iftype,
 993                                 const u8 *addr)
 994 {
 995         struct nl_msg *msg, *flags = NULL;
 996         int ifidx;
 997         struct ifreq ifreq;
 998         struct iwreq iwr;
 999         int ret = -ENOBUFS;
1000
1001         msg = nlmsg_alloc();
1002         if (!msg)
1003                 return -1;
1004
1005         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1006                     0, NL80211_CMD_NEW_INTERFACE, 0);
1007         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1008                     if_nametoindex(drv->hapd->conf->iface));
1009         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
1010         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
1011
1012         if (iftype == NL80211_IFTYPE_MONITOR) {
1013                 int err;
1014
1015                 flags = nlmsg_alloc();
1016                 if (!flags)
1017                         goto nla_put_failure;
1018
1019                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
1020
1021                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
1022
1023                 nlmsg_free(flags);
1024
1025                 if (err)
1026                         goto nla_put_failure;
1027         }
1028
1029         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1030         if (ret) {
1031  nla_put_failure:
1032                 printf("Failed to create interface %s.\n", ifname);
1033                 return ret;
1034         }
1035
1036         ifidx = if_nametoindex(ifname);
1037
1038         if (ifidx <= 0)
1039                 return -1;
1040
1041         /* start listening for EAPOL on this interface */
1042         add_ifidx(drv, ifidx);
1043
1044         if (addr) {
1045                 switch (iftype) {
1046                 case NL80211_IFTYPE_AP:
1047                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
1048                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
1049                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1050
1051                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
1052                                 nl80211_remove_iface(drv, ifidx);
1053                                 return -1;
1054                         }
1055                         break;
1056                 case NL80211_IFTYPE_WDS:
1057                         memset(&iwr, 0, sizeof(iwr));
1058                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1059                         iwr.u.addr.sa_family = ARPHRD_ETHER;
1060                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
1061                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
1062                                 return -1;
1063                         break;
1064                 default:
1065                         /* nothing */
1066                         break;
1067                 }
1068         }
1069
1070         return ifidx;
1071 }
1072
1073
1074 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
1075 {
1076         int ifidx;
1077
1078         /*
1079          * The kernel supports that when the low-level driver does,
1080          * but we currently don't because we need per-BSS data that
1081          * currently we can't handle easily.
1082          */
1083         return -1;
1084
1085         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
1086         if (ifidx < 0)
1087                 return -1;
1088         if (hostapd_set_iface_flags(priv, ifname, 1)) {
1089                 nl80211_remove_iface(priv, ifidx);
1090                 return -1;
1091         }
1092         return 0;
1093 }
1094
1095
1096 static int i802_bss_remove(void *priv, const char *ifname)
1097 {
1098         nl80211_remove_iface(priv, if_nametoindex(ifname));
1099         return 0;
1100 }
1101
1102
1103 static int i802_set_beacon(const char *iface, void *priv,
1104                            u8 *head, size_t head_len,
1105                            u8 *tail, size_t tail_len)
1106 {
1107         struct i802_driver_data *drv = priv;
1108         struct nl_msg *msg;
1109         u8 cmd = NL80211_CMD_NEW_BEACON;
1110         int ret;
1111
1112         msg = nlmsg_alloc();
1113         if (!msg)
1114                 return -ENOMEM;
1115
1116         if (drv->beacon_set)
1117                 cmd = NL80211_CMD_SET_BEACON;
1118
1119         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1120                     0, cmd, 0);
1121         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1122         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1123         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1124         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
1125
1126         if (!drv->dtim_period)
1127                 drv->dtim_period = 2;
1128         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1129
1130         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1131         if (!ret)
1132                 drv->beacon_set = 1;
1133         return ret;
1134  nla_put_failure:
1135         return -ENOBUFS;
1136 }
1137
1138
1139 static int i802_del_beacon(struct i802_driver_data *drv)
1140 {
1141         struct nl_msg *msg;
1142
1143         msg = nlmsg_alloc();
1144         if (!msg)
1145                 return -ENOMEM;
1146
1147         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1148                     0, NL80211_CMD_DEL_BEACON, 0);
1149         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1150
1151         return send_and_recv_msgs(drv, msg, NULL, NULL);
1152  nla_put_failure:
1153         return -ENOBUFS;
1154 }
1155
1156
1157 static int i802_set_ieee8021x(const char *ifname, void *priv, int enabled)
1158 {
1159         struct i802_driver_data *drv = priv;
1160
1161         /*
1162          * FIXME: This needs to be per interface (BSS)
1163          */
1164         drv->ieee802_1x_active = enabled;
1165         return 0;
1166 }
1167
1168
1169 static int i802_set_privacy(const char *ifname, void *priv, int enabled)
1170 {
1171         struct i802_driver_data *drv = priv;
1172         struct iwreq iwr;
1173
1174         memset(&iwr, 0, sizeof(iwr));
1175
1176         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1177         iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
1178         iwr.u.param.value = enabled;
1179
1180         ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
1181
1182         /* ignore errors, the kernel/driver might not care */
1183         return 0;
1184 }
1185
1186
1187 static int i802_set_internal_bridge(void *priv, int value)
1188 {
1189         return -1;
1190 }
1191
1192
1193 static int i802_set_beacon_int(void *priv, int value)
1194 {
1195         struct i802_driver_data *drv = priv;
1196         struct nl_msg *msg;
1197
1198         drv->beacon_int = value;
1199
1200         if (!drv->beacon_set)
1201                 return 0;
1202
1203         msg = nlmsg_alloc();
1204         if (!msg)
1205                 return -ENOMEM;
1206
1207         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1208                     0, NL80211_CMD_SET_BEACON, 0);
1209         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1210
1211         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
1212
1213         return send_and_recv_msgs(drv, msg, NULL, NULL);
1214  nla_put_failure:
1215         return -ENOBUFS;
1216 }
1217
1218
1219 static int i802_set_dtim_period(const char *iface, void *priv, int value)
1220 {
1221         struct i802_driver_data *drv = priv;
1222         struct nl_msg *msg;
1223
1224         msg = nlmsg_alloc();
1225         if (!msg)
1226                 return -ENOMEM;
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         return send_and_recv_msgs(drv, msg, NULL, NULL);
1236  nla_put_failure:
1237         return -ENOBUFS;
1238 }
1239
1240
1241 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
1242 {
1243 #ifdef NL80211_CMD_SET_BSS
1244         struct i802_driver_data *drv = priv;
1245         struct nl_msg *msg;
1246
1247         msg = nlmsg_alloc();
1248         if (!msg)
1249                 return -ENOMEM;
1250
1251         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1252                     NL80211_CMD_SET_BSS, 0);
1253
1254         if (cts >= 0)
1255                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
1256         if (preamble >= 0)
1257                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
1258         if (slot >= 0)
1259                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
1260
1261         /* TODO: multi-BSS support */
1262         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1263
1264         return send_and_recv_msgs(drv, msg, NULL, NULL);
1265  nla_put_failure:
1266         return -ENOBUFS;
1267 #else /* NL80211_CMD_SET_BSS */
1268         return -1;
1269 #endif /* NL80211_CMD_SET_BSS */
1270 }
1271
1272
1273 static int i802_set_cts_protect(void *priv, int value)
1274 {
1275         return i802_set_bss(priv, value, -1, -1);
1276 }
1277
1278
1279 static int i802_set_preamble(void *priv, int value)
1280 {
1281         return i802_set_bss(priv, -1, value, -1);
1282 }
1283
1284
1285 static int i802_set_short_slot_time(void *priv, int value)
1286 {
1287         return i802_set_bss(priv, -1, -1, value);
1288 }
1289
1290
1291 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
1292 {
1293         switch (type) {
1294         case HOSTAPD_IF_VLAN:
1295                 return NL80211_IFTYPE_AP_VLAN;
1296         case HOSTAPD_IF_WDS:
1297                 return NL80211_IFTYPE_WDS;
1298         }
1299         return -1;
1300 }
1301
1302
1303 static int i802_if_add(const char *iface, void *priv,
1304                        enum hostapd_driver_if_type type, char *ifname,
1305                        const u8 *addr)
1306 {
1307         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
1308                 return -1;
1309         return 0;
1310 }
1311
1312
1313 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
1314                           char *ifname, const u8 *addr)
1315 {
1316         /* unused at the moment */
1317         return -1;
1318 }
1319
1320
1321 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
1322                           const char *ifname, const u8 *addr)
1323 {
1324         nl80211_remove_iface(priv, if_nametoindex(ifname));
1325         return 0;
1326 }
1327
1328
1329 struct phy_info_arg {
1330         u16 *num_modes;
1331         struct hostapd_hw_modes *modes;
1332 };
1333
1334 static int phy_info_handler(struct nl_msg *msg, void *arg)
1335 {
1336         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1337         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1338         struct phy_info_arg *phy_info = arg;
1339
1340         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1341
1342         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1343         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1344                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1345                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1346                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1347                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1348                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1349 #ifdef NL80211_FREQUENCY_ATTR_MAX_TX_POWER
1350                 [NL80211_FREQUENCY_ATTR_MAX_TX_POWER] = { .type = NLA_U32 },
1351 #endif /* NL80211_FREQUENCY_ATTR_MAX_TX_POWER */
1352         };
1353
1354         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1355         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1356                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1357                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1358         };
1359
1360         struct nlattr *nl_band;
1361         struct nlattr *nl_freq;
1362         struct nlattr *nl_rate;
1363         int rem_band, rem_freq, rem_rate;
1364         struct hostapd_hw_modes *mode;
1365         int idx, mode_is_set;
1366
1367         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1368                   genlmsg_attrlen(gnlh, 0), NULL);
1369
1370         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1371                 return NL_SKIP;
1372
1373         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1374                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1375                 if (!mode)
1376                         return NL_SKIP;
1377                 phy_info->modes = mode;
1378
1379                 mode_is_set = 0;
1380
1381                 mode = &phy_info->modes[*(phy_info->num_modes)];
1382                 memset(mode, 0, sizeof(*mode));
1383                 *(phy_info->num_modes) += 1;
1384
1385                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1386                           nla_len(nl_band), NULL);
1387
1388                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1389                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1390                                   nla_len(nl_freq), freq_policy);
1391                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1392                                 continue;
1393                         mode->num_channels++;
1394                 }
1395
1396                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1397                 if (!mode->channels)
1398                         return NL_SKIP;
1399
1400                 idx = 0;
1401
1402                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1403                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1404                                   nla_len(nl_freq), freq_policy);
1405                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1406                                 continue;
1407
1408                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1409                         mode->channels[idx].flag = 0;
1410
1411                         if (!mode_is_set) {
1412                                 /* crude heuristic */
1413                                 if (mode->channels[idx].freq < 4000)
1414                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1415                                 else
1416                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1417                                 mode_is_set = 1;
1418                         }
1419
1420                         /* crude heuristic */
1421                         if (mode->channels[idx].freq < 4000)
1422                                 if (mode->channels[idx].freq == 2848)
1423                                         mode->channels[idx].chan = 14;
1424                                 else
1425                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1426                         else
1427                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1428
1429                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1430                                 mode->channels[idx].flag |=
1431                                         HOSTAPD_CHAN_DISABLED;
1432                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1433                                 mode->channels[idx].flag |=
1434                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1435                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1436                                 mode->channels[idx].flag |=
1437                                         HOSTAPD_CHAN_NO_IBSS;
1438                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1439                                 mode->channels[idx].flag |=
1440                                         HOSTAPD_CHAN_RADAR;
1441
1442 #ifdef NL80211_FREQUENCY_ATTR_MAX_TX_POWER
1443                         if (tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER] &&
1444                             !tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1445                                 mode->channels[idx].max_tx_power =
1446                                         nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_MAX_TX_POWER]) / 100;
1447 #endif /* NL80211_FREQUENCY_ATTR_MAX_TX_POWER */
1448
1449                         idx++;
1450                 }
1451
1452                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1453                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1454                                   nla_len(nl_rate), rate_policy);
1455                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1456                                 continue;
1457                         mode->num_rates++;
1458                 }
1459
1460                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1461                 if (!mode->rates)
1462                         return NL_SKIP;
1463
1464                 idx = 0;
1465
1466                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1467                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1468                                   nla_len(nl_rate), rate_policy);
1469                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1470                                 continue;
1471                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1472
1473                         /* crude heuristic */
1474                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1475                             mode->rates[idx].rate > 200)
1476                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1477
1478                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1479                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1480
1481                         idx++;
1482                 }
1483         }
1484
1485         return NL_SKIP;
1486 }
1487
1488 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
1489                                                          u16 *num_modes,
1490                                                          u16 *flags)
1491 {
1492         struct i802_driver_data *drv = priv;
1493         struct nl_msg *msg;
1494         struct phy_info_arg result = {
1495                 .num_modes = num_modes,
1496                 .modes = NULL,
1497         };
1498
1499         *num_modes = 0;
1500         *flags = 0;
1501
1502         msg = nlmsg_alloc();
1503         if (!msg)
1504                 return NULL;
1505
1506         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1507                     0, NL80211_CMD_GET_WIPHY, 0);
1508
1509         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1510
1511         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1512                 return result.modes;
1513  nla_put_failure:
1514         return NULL;
1515 }
1516
1517
1518 static int i802_set_sta_vlan(void *priv, const u8 *addr,
1519                              const char *ifname, int vlan_id)
1520 {
1521         struct i802_driver_data *drv = priv;
1522         struct nl_msg *msg;
1523
1524         msg = nlmsg_alloc();
1525         if (!msg)
1526                 return -ENOMEM;
1527
1528         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1529                     0, NL80211_CMD_SET_STATION, 0);
1530
1531         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1532                     if_nametoindex(drv->iface));
1533         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1534         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1535                     if_nametoindex(ifname));
1536
1537         return send_and_recv_msgs(drv, msg, NULL, NULL);
1538  nla_put_failure:
1539         return -ENOBUFS;
1540 }
1541
1542
1543 static int i802_set_country(void *priv, const char *country)
1544 {
1545         struct i802_driver_data *drv = priv;
1546         struct nl_msg *msg;
1547         char alpha2[3];
1548
1549         msg = nlmsg_alloc();
1550         if (!msg)
1551                 return -ENOMEM;
1552
1553         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1554                     0, NL80211_CMD_REQ_SET_REG, 0);
1555
1556         alpha2[0] = country[0];
1557         alpha2[1] = country[1];
1558         alpha2[2] = '\0';
1559         NLA_PUT_STRING(msg, NL80211_ATTR_REG_ALPHA2, alpha2);
1560
1561         return send_and_recv_msgs(drv, msg, NULL, NULL);
1562  nla_put_failure:
1563         return -ENOBUFS;
1564 }
1565
1566
1567 static void handle_unknown_sta(struct hostapd_data *hapd, u8 *ta)
1568 {
1569         struct sta_info *sta;
1570
1571         sta = ap_get_sta(hapd, ta);
1572         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
1573                 printf("Data/PS-poll frame from not associated STA "
1574                        MACSTR "\n", MAC2STR(ta));
1575                 if (sta && (sta->flags & WLAN_STA_AUTH))
1576                         hostapd_sta_disassoc(
1577                                 hapd, ta,
1578                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1579                 else
1580                         hostapd_sta_deauth(
1581                                 hapd, ta,
1582                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1583         }
1584 }
1585
1586
1587 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
1588                                int ok)
1589 {
1590         struct ieee80211_hdr *hdr;
1591         u16 fc, type, stype;
1592         struct sta_info *sta;
1593
1594         hdr = (struct ieee80211_hdr *) buf;
1595         fc = le_to_host16(hdr->frame_control);
1596
1597         type = WLAN_FC_GET_TYPE(fc);
1598         stype = WLAN_FC_GET_STYPE(fc);
1599
1600         switch (type) {
1601         case WLAN_FC_TYPE_MGMT:
1602                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
1603                            ok ? "ACK" : "fail");
1604                 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
1605                 break;
1606         case WLAN_FC_TYPE_CTRL:
1607                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
1608                            ok ? "ACK" : "fail");
1609                 break;
1610         case WLAN_FC_TYPE_DATA:
1611                 wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
1612                            ok ? "ACK" : "fail");
1613                 sta = ap_get_sta(hapd, hdr->addr1);
1614                 if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
1615                         wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
1616                                    "activity poll", MAC2STR(sta->addr),
1617                                    ok ? "ACKed" : "did not ACK");
1618                         if (ok)
1619                                 sta->flags &= ~WLAN_STA_PENDING_POLL;
1620                 }
1621                 if (sta)
1622                         ieee802_1x_tx_status(hapd, sta, buf, len, ok);
1623                 break;
1624         default:
1625                 printf("unknown TX callback frame type %d\n", type);
1626                 break;
1627         }
1628 }
1629
1630
1631 static void handle_frame(struct hostapd_iface *iface, u8 *buf, size_t len,
1632                          struct hostapd_frame_info *hfi,
1633                          enum ieee80211_msg_type msg_type)
1634 {
1635         struct ieee80211_hdr *hdr;
1636         u16 fc, type, stype;
1637         size_t data_len = len;
1638         struct hostapd_data *hapd = NULL;
1639         int broadcast_bssid = 0;
1640         size_t i;
1641         u8 *bssid;
1642
1643         /*
1644          * PS-Poll frames are 16 bytes. All other frames are
1645          * 24 bytes or longer.
1646          */
1647         if (len < 16)
1648                 return;
1649
1650         hdr = (struct ieee80211_hdr *) buf;
1651         fc = le_to_host16(hdr->frame_control);
1652
1653         type = WLAN_FC_GET_TYPE(fc);
1654         stype = WLAN_FC_GET_STYPE(fc);
1655
1656         switch (type) {
1657         case WLAN_FC_TYPE_DATA:
1658                 if (len < 24)
1659                         return;
1660                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
1661                 case WLAN_FC_TODS:
1662                         bssid = hdr->addr1;
1663                         break;
1664                 default:
1665                         /* discard */
1666                         return;
1667                 }
1668                 break;
1669         case WLAN_FC_TYPE_CTRL:
1670                 /* discard non-ps-poll frames */
1671                 if (stype != WLAN_FC_STYPE_PSPOLL)
1672                         return;
1673                 bssid = hdr->addr1;
1674                 break;
1675         case WLAN_FC_TYPE_MGMT:
1676                 bssid = hdr->addr3;
1677                 break;
1678         default:
1679                 /* discard */
1680                 return;
1681         }
1682
1683         /* find interface frame belongs to */
1684         for (i = 0; i < iface->num_bss; i++) {
1685                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
1686                         hapd = iface->bss[i];
1687                         break;
1688                 }
1689         }
1690
1691         if (hapd == NULL) {
1692                 hapd = iface->bss[0];
1693
1694                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
1695                     bssid[2] != 0xff || bssid[3] != 0xff ||
1696                     bssid[4] != 0xff || bssid[5] != 0xff) {
1697                         /*
1698                          * Unknown BSSID - drop frame if this is not from
1699                          * passive scanning or a beacon (at least ProbeReq
1700                          * frames to other APs may be allowed through RX
1701                          * filtering in the wlan hw/driver)
1702                          */
1703                         if ((type != WLAN_FC_TYPE_MGMT ||
1704                              stype != WLAN_FC_STYPE_BEACON))
1705                                 return;
1706                 } else
1707                         broadcast_bssid = 1;
1708         }
1709
1710         switch (msg_type) {
1711         case ieee80211_msg_normal:
1712                 /* continue processing */
1713                 break;
1714         case ieee80211_msg_tx_callback_ack:
1715                 handle_tx_callback(hapd, buf, data_len, 1);
1716                 return;
1717         case ieee80211_msg_tx_callback_fail:
1718                 handle_tx_callback(hapd, buf, data_len, 0);
1719                 return;
1720         }
1721
1722         switch (type) {
1723         case WLAN_FC_TYPE_MGMT:
1724                 if (stype != WLAN_FC_STYPE_BEACON &&
1725                     stype != WLAN_FC_STYPE_PROBE_REQ)
1726                         wpa_printf(MSG_MSGDUMP, "MGMT");
1727                 if (broadcast_bssid) {
1728                         for (i = 0; i < iface->num_bss; i++)
1729                                 ieee802_11_mgmt(iface->bss[i], buf, data_len,
1730                                                 stype, hfi);
1731                 } else
1732                         ieee802_11_mgmt(hapd, buf, data_len, stype, hfi);
1733                 break;
1734         case WLAN_FC_TYPE_CTRL:
1735                 /* can only get here with PS-Poll frames */
1736                 wpa_printf(MSG_DEBUG, "CTRL");
1737                 handle_unknown_sta(hapd, hdr->addr2);
1738                 break;
1739         case WLAN_FC_TYPE_DATA:
1740                 wpa_printf(MSG_DEBUG, "DATA");
1741                 handle_unknown_sta(hapd, hdr->addr2);
1742                 break;
1743         }
1744 }
1745
1746
1747 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
1748 {
1749         struct i802_driver_data *drv = eloop_ctx;
1750         struct hostapd_data *hapd = drv->hapd;
1751         struct sockaddr_ll lladdr;
1752         unsigned char buf[3000];
1753         int len;
1754         socklen_t fromlen = sizeof(lladdr);
1755
1756         len = recvfrom(sock, buf, sizeof(buf), 0,
1757                        (struct sockaddr *)&lladdr, &fromlen);
1758         if (len < 0) {
1759                 perror("recv");
1760                 return;
1761         }
1762
1763         if (have_ifidx(drv, lladdr.sll_ifindex))
1764                 ieee802_1x_receive(hapd, lladdr.sll_addr, buf, len);
1765 }
1766
1767
1768 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1769 {
1770         struct i802_driver_data *drv = eloop_ctx;
1771         int len;
1772         unsigned char buf[3000];
1773         struct hostapd_data *hapd = drv->hapd;
1774         struct ieee80211_radiotap_iterator iter;
1775         int ret;
1776         struct hostapd_frame_info hfi;
1777         int injected = 0, failed = 0, msg_type, rxflags = 0;
1778
1779         len = recv(sock, buf, sizeof(buf), 0);
1780         if (len < 0) {
1781                 perror("recv");
1782                 return;
1783         }
1784
1785         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
1786                 printf("received invalid radiotap frame\n");
1787                 return;
1788         }
1789
1790         memset(&hfi, 0, sizeof(hfi));
1791
1792         while (1) {
1793                 ret = ieee80211_radiotap_iterator_next(&iter);
1794                 if (ret == -ENOENT)
1795                         break;
1796                 if (ret) {
1797                         printf("received invalid radiotap frame (%d)\n", ret);
1798                         return;
1799                 }
1800                 switch (iter.this_arg_index) {
1801                 case IEEE80211_RADIOTAP_FLAGS:
1802                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1803                                 len -= 4;
1804                         break;
1805                 case IEEE80211_RADIOTAP_RX_FLAGS:
1806                         rxflags = 1;
1807                         break;
1808                 case IEEE80211_RADIOTAP_TX_FLAGS:
1809                         injected = 1;
1810                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
1811                                         IEEE80211_RADIOTAP_F_TX_FAIL;
1812                         break;
1813                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1814                         break;
1815                 case IEEE80211_RADIOTAP_CHANNEL:
1816                         /* TODO convert from freq/flags to channel number
1817                         hfi.channel = XXX;
1818                         hfi.phytype = XXX;
1819                          */
1820                         break;
1821                 case IEEE80211_RADIOTAP_RATE:
1822                         hfi.datarate = *iter.this_arg * 5;
1823                         break;
1824                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1825                         hfi.ssi_signal = *iter.this_arg;
1826                         break;
1827                 }
1828         }
1829
1830         if (rxflags && injected)
1831                 return;
1832
1833         if (!injected)
1834                 msg_type = ieee80211_msg_normal;
1835         else if (failed)
1836                 msg_type = ieee80211_msg_tx_callback_fail;
1837         else
1838                 msg_type = ieee80211_msg_tx_callback_ack;
1839
1840         handle_frame(hapd->iface, buf + iter.max_length,
1841                      len - iter.max_length, &hfi, msg_type);
1842 }
1843
1844
1845 static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
1846 {
1847         char buf[IFNAMSIZ];
1848         struct sockaddr_ll ll;
1849         int optval;
1850         socklen_t optlen;
1851
1852         snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
1853         buf[IFNAMSIZ - 1] = '\0';
1854
1855         drv->monitor_ifidx =
1856                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
1857
1858         if (drv->monitor_ifidx < 0)
1859                 return -1;
1860
1861         if (hostapd_set_iface_flags(drv, buf, 1))
1862                 goto error;
1863
1864         memset(&ll, 0, sizeof(ll));
1865         ll.sll_family = AF_PACKET;
1866         ll.sll_ifindex = drv->monitor_ifidx;
1867         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1868         if (drv->monitor_sock < 0) {
1869                 perror("socket[PF_PACKET,SOCK_RAW]");
1870                 goto error;
1871         }
1872
1873         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1874                  sizeof(ll)) < 0) {
1875                 perror("monitor socket bind");
1876                 goto error;
1877         }
1878
1879         optlen = sizeof(optval);
1880         optval = 20;
1881         if (setsockopt
1882             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1883                 perror("Failed to set socket priority");
1884                 goto error;
1885         }
1886
1887         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1888                                      drv, NULL)) {
1889                 printf("Could not register monitor read socket\n");
1890                 goto error;
1891         }
1892
1893         return 0;
1894  error:
1895         nl80211_remove_iface(drv, drv->monitor_ifidx);
1896         return -1;
1897 }
1898
1899
1900 static int nl80211_set_master_mode(struct i802_driver_data *drv,
1901                                    const char *ifname)
1902 {
1903         struct nl_msg *msg;
1904         int ret = -ENOBUFS;
1905
1906         msg = nlmsg_alloc();
1907         if (!msg)
1908                 return -ENOMEM;
1909
1910         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1911                     0, NL80211_CMD_SET_INTERFACE, 0);
1912         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1913                     if_nametoindex(ifname));
1914         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
1915
1916         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1917         if (!ret)
1918                 return 0;
1919  nla_put_failure:
1920         wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
1921                    "mode.", ifname);
1922         return ret;
1923 }
1924
1925
1926 static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
1927 {
1928         struct ifreq ifr;
1929         struct sockaddr_ll addr;
1930
1931         drv->ioctl_sock = -1;
1932
1933         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1934         if (drv->ioctl_sock < 0) {
1935                 perror("socket[PF_INET,SOCK_DGRAM]");
1936                 return -1;
1937         }
1938
1939         /* start listening for EAPOL on the default AP interface */
1940         add_ifidx(drv, if_nametoindex(drv->iface));
1941
1942         if (hostapd_set_iface_flags(drv, drv->iface, 0))
1943                 return -1;
1944
1945         if (bssid) {
1946                 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
1947                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
1948                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1949
1950                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
1951                         perror("ioctl(SIOCSIFHWADDR)");
1952                         return -1;
1953                 }
1954         }
1955
1956         /*
1957          * initialise generic netlink and nl80211
1958          */
1959         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1960         if (!drv->nl_cb) {
1961                 printf("Failed to allocate netlink callbacks.\n");
1962                 return -1;
1963         }
1964
1965         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1966         if (!drv->nl_handle) {
1967                 printf("Failed to allocate netlink handle.\n");
1968                 return -1;
1969         }
1970
1971         if (genl_connect(drv->nl_handle)) {
1972                 printf("Failed to connect to generic netlink.\n");
1973                 return -1;
1974         }
1975
1976         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1977         if (!drv->nl_cache) {
1978                 printf("Failed to allocate generic netlink cache.\n");
1979                 return -1;
1980         }
1981
1982         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1983         if (!drv->nl80211) {
1984                 printf("nl80211 not found.\n");
1985                 return -1;
1986         }
1987
1988         /* Initialise a monitor interface */
1989         if (nl80211_create_monitor_interface(drv))
1990                 return -1;
1991
1992         if (nl80211_set_master_mode(drv, drv->iface))
1993                 goto fail1;
1994
1995         if (hostapd_set_iface_flags(drv, drv->iface, 1))
1996                 goto fail1;
1997
1998         memset(&addr, 0, sizeof(addr));
1999         addr.sll_family = AF_PACKET;
2000         addr.sll_ifindex = ifr.ifr_ifindex;
2001         wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
2002                    addr.sll_ifindex);
2003
2004         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
2005         if (drv->eapol_sock < 0) {
2006                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
2007                 goto fail1;
2008         }
2009
2010         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
2011         {
2012                 printf("Could not register read socket for eapol\n");
2013                 return -1;
2014         }
2015
2016         memset(&ifr, 0, sizeof(ifr));
2017         os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
2018         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
2019                 perror("ioctl(SIOCGIFHWADDR)");
2020                 goto fail1;
2021         }
2022
2023         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
2024                 printf("Invalid HW-addr family 0x%04x\n",
2025                        ifr.ifr_hwaddr.sa_family);
2026                 goto fail1;
2027         }
2028         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
2029
2030         return 0;
2031
2032 fail1:
2033         nl80211_remove_iface(drv, drv->monitor_ifidx);
2034         return -1;
2035 }
2036
2037
2038 static int i802_get_inact_sec(void *priv, const u8 *addr)
2039 {
2040         struct hostap_sta_driver_data data;
2041         int ret;
2042
2043         data.inactive_msec = (unsigned long) -1;
2044         ret = i802_read_sta_data(priv, &data, addr);
2045         if (ret || data.inactive_msec == (unsigned long) -1)
2046                 return -1;
2047         return data.inactive_msec / 1000;
2048 }
2049
2050
2051 static int i802_sta_clear_stats(void *priv, const u8 *addr)
2052 {
2053 #if 0
2054         /* TODO */
2055 #endif
2056         return 0;
2057 }
2058
2059
2060 static void
2061 hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
2062                                        char *custom)
2063 {
2064         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
2065
2066         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
2067                 char *pos;
2068                 u8 addr[ETH_ALEN];
2069                 pos = strstr(custom, "addr=");
2070                 if (pos == NULL) {
2071                         wpa_printf(MSG_DEBUG,
2072                                    "MLME-MICHAELMICFAILURE.indication "
2073                                    "without sender address ignored");
2074                         return;
2075                 }
2076                 pos += 5;
2077                 if (hwaddr_aton(pos, addr) == 0) {
2078                         ieee80211_michael_mic_failure(drv->hapd, addr, 1);
2079                 } else {
2080                         wpa_printf(MSG_DEBUG,
2081                                    "MLME-MICHAELMICFAILURE.indication "
2082                                    "with invalid MAC address");
2083                 }
2084         }
2085 }
2086
2087
2088 static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
2089                                             char *data, int len)
2090 {
2091         struct iw_event iwe_buf, *iwe = &iwe_buf;
2092         char *pos, *end, *custom, *buf;
2093
2094         pos = data;
2095         end = data + len;
2096
2097         while (pos + IW_EV_LCP_LEN <= end) {
2098                 /* Event data may be unaligned, so make a local, aligned copy
2099                  * before processing. */
2100                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2101                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
2102                            iwe->cmd, iwe->len);
2103                 if (iwe->len <= IW_EV_LCP_LEN)
2104                         return;
2105
2106                 custom = pos + IW_EV_POINT_LEN;
2107                 if (drv->we_version > 18 &&
2108                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
2109                      iwe->cmd == IWEVCUSTOM)) {
2110                         /* WE-19 removed the pointer from struct iw_point */
2111                         char *dpos = (char *) &iwe_buf.u.data.length;
2112                         int dlen = dpos - (char *) &iwe_buf;
2113                         memcpy(dpos, pos + IW_EV_LCP_LEN,
2114                                sizeof(struct iw_event) - dlen);
2115                 } else {
2116                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2117                         custom += IW_EV_POINT_OFF;
2118                 }
2119
2120                 switch (iwe->cmd) {
2121                 case IWEVCUSTOM:
2122                         if (custom + iwe->u.data.length > end)
2123                                 return;
2124                         buf = malloc(iwe->u.data.length + 1);
2125                         if (buf == NULL)
2126                                 return;
2127                         memcpy(buf, custom, iwe->u.data.length);
2128                         buf[iwe->u.data.length] = '\0';
2129                         hostapd_wireless_event_wireless_custom(drv, buf);
2130                         free(buf);
2131                         break;
2132                 }
2133
2134                 pos += iwe->len;
2135         }
2136 }
2137
2138
2139 static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
2140                                                struct nlmsghdr *h, int len)
2141 {
2142         struct ifinfomsg *ifi;
2143         int attrlen, nlmsg_len, rta_len;
2144         struct rtattr *attr;
2145
2146         if (len < (int) sizeof(*ifi))
2147                 return;
2148
2149         ifi = NLMSG_DATA(h);
2150
2151         /* TODO: use ifi->ifi_index to filter out wireless events from other
2152          * interfaces */
2153
2154         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2155
2156         attrlen = h->nlmsg_len - nlmsg_len;
2157         if (attrlen < 0)
2158                 return;
2159
2160         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
2161
2162         rta_len = RTA_ALIGN(sizeof(struct rtattr));
2163         while (RTA_OK(attr, attrlen)) {
2164                 if (attr->rta_type == IFLA_WIRELESS) {
2165                         hostapd_wireless_event_wireless(
2166                                 drv, ((char *) attr) + rta_len,
2167                                 attr->rta_len - rta_len);
2168                 }
2169                 attr = RTA_NEXT(attr, attrlen);
2170         }
2171 }
2172
2173
2174 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
2175                                            void *sock_ctx)
2176 {
2177         char buf[256];
2178         int left;
2179         struct sockaddr_nl from;
2180         socklen_t fromlen;
2181         struct nlmsghdr *h;
2182         struct i802_driver_data *drv = eloop_ctx;
2183
2184         fromlen = sizeof(from);
2185         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
2186                         (struct sockaddr *) &from, &fromlen);
2187         if (left < 0) {
2188                 if (errno != EINTR && errno != EAGAIN)
2189                         perror("recvfrom(netlink)");
2190                 return;
2191         }
2192
2193         h = (struct nlmsghdr *) buf;
2194         while (left >= (int) sizeof(*h)) {
2195                 int len, plen;
2196
2197                 len = h->nlmsg_len;
2198                 plen = len - sizeof(*h);
2199                 if (len > left || plen < 0) {
2200                         printf("Malformed netlink message: "
2201                                "len=%d left=%d plen=%d\n",
2202                                len, left, plen);
2203                         break;
2204                 }
2205
2206                 switch (h->nlmsg_type) {
2207                 case RTM_NEWLINK:
2208                         hostapd_wireless_event_rtm_newlink(drv, h, plen);
2209                         break;
2210                 }
2211
2212                 len = NLMSG_ALIGN(len);
2213                 left -= len;
2214                 h = (struct nlmsghdr *) ((char *) h + len);
2215         }
2216
2217         if (left > 0) {
2218                 printf("%d extra bytes in the end of netlink message\n", left);
2219         }
2220 }
2221
2222
2223 static int hostap_get_we_version(struct i802_driver_data *drv)
2224 {
2225         struct iw_range *range;
2226         struct iwreq iwr;
2227         int minlen;
2228         size_t buflen;
2229
2230         drv->we_version = 0;
2231
2232         /*
2233          * Use larger buffer than struct iw_range in order to allow the
2234          * structure to grow in the future.
2235          */
2236         buflen = sizeof(struct iw_range) + 500;
2237         range = os_zalloc(buflen);
2238         if (range == NULL)
2239                 return -1;
2240
2241         memset(&iwr, 0, sizeof(iwr));
2242         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2243         iwr.u.data.pointer = (caddr_t) range;
2244         iwr.u.data.length = buflen;
2245
2246         minlen = ((char *) &range->enc_capa) - (char *) range +
2247                 sizeof(range->enc_capa);
2248
2249         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2250                 perror("ioctl[SIOCGIWRANGE]");
2251                 free(range);
2252                 return -1;
2253         } else if (iwr.u.data.length >= minlen &&
2254                    range->we_version_compiled >= 18) {
2255                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2256                            "WE(source)=%d enc_capa=0x%x",
2257                            range->we_version_compiled,
2258                            range->we_version_source,
2259                            range->enc_capa);
2260                 drv->we_version = range->we_version_compiled;
2261         }
2262
2263         free(range);
2264         return 0;
2265 }
2266
2267
2268 static int i802_wireless_event_init(void *priv)
2269 {
2270         struct i802_driver_data *drv = priv;
2271         int s;
2272         struct sockaddr_nl local;
2273
2274         hostap_get_we_version(drv);
2275
2276         drv->wext_sock = -1;
2277
2278         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2279         if (s < 0) {
2280                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2281                 return -1;
2282         }
2283
2284         memset(&local, 0, sizeof(local));
2285         local.nl_family = AF_NETLINK;
2286         local.nl_groups = RTMGRP_LINK;
2287         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2288                 perror("bind(netlink)");
2289                 close(s);
2290                 return -1;
2291         }
2292
2293         eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
2294                                  NULL);
2295         drv->wext_sock = s;
2296
2297         return 0;
2298 }
2299
2300
2301 static void i802_wireless_event_deinit(void *priv)
2302 {
2303         struct i802_driver_data *drv = priv;
2304         if (drv->wext_sock < 0)
2305                 return;
2306         eloop_unregister_read_sock(drv->wext_sock);
2307         close(drv->wext_sock);
2308 }
2309
2310
2311 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
2312 {
2313         struct i802_driver_data *drv = priv;
2314         struct ieee80211_mgmt mgmt;
2315
2316         memset(&mgmt, 0, sizeof(mgmt));
2317         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2318                                           WLAN_FC_STYPE_DEAUTH);
2319         memcpy(mgmt.da, addr, ETH_ALEN);
2320         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2321         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2322         mgmt.u.deauth.reason_code = host_to_le16(reason);
2323         return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2324                                       sizeof(mgmt.u.deauth), 0);
2325 }
2326
2327
2328 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
2329 {
2330         struct i802_driver_data *drv = priv;
2331         struct ieee80211_mgmt mgmt;
2332
2333         memset(&mgmt, 0, sizeof(mgmt));
2334         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2335                                           WLAN_FC_STYPE_DISASSOC);
2336         memcpy(mgmt.da, addr, ETH_ALEN);
2337         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2338         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2339         mgmt.u.disassoc.reason_code = host_to_le16(reason);
2340         return  i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2341                                        sizeof(mgmt.u.disassoc), 0);
2342 }
2343
2344
2345 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
2346 {
2347         struct i802_driver_data *drv;
2348
2349         drv = os_zalloc(sizeof(struct i802_driver_data));
2350         if (drv == NULL) {
2351                 printf("Could not allocate memory for i802 driver data\n");
2352                 return NULL;
2353         }
2354
2355         drv->hapd = hapd;
2356         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
2357
2358         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
2359         drv->if_indices = drv->default_if_indices;
2360         drv->bridge = if_nametoindex(hapd->conf->bridge);
2361
2362         if (i802_init_sockets(drv, bssid))
2363                 goto failed;
2364
2365         return drv;
2366
2367 failed:
2368         free(drv);
2369         return NULL;
2370 }
2371
2372
2373 static void *i802_init(struct hostapd_data *hapd)
2374 {
2375         return i802_init_bssid(hapd, NULL);
2376 }
2377
2378
2379 static void i802_deinit(void *priv)
2380 {
2381         struct i802_driver_data *drv = priv;
2382
2383         i802_del_beacon(drv);
2384
2385         /* remove monitor interface */
2386         nl80211_remove_iface(drv, drv->monitor_ifidx);
2387
2388         (void) hostapd_set_iface_flags(drv, drv->iface, 0);
2389
2390         if (drv->monitor_sock >= 0) {
2391                 eloop_unregister_read_sock(drv->monitor_sock);
2392                 close(drv->monitor_sock);
2393         }
2394         if (drv->ioctl_sock >= 0)
2395                 close(drv->ioctl_sock);
2396         if (drv->eapol_sock >= 0) {
2397                 eloop_unregister_read_sock(drv->eapol_sock);
2398                 close(drv->eapol_sock);
2399         }
2400
2401         genl_family_put(drv->nl80211);
2402         nl_cache_free(drv->nl_cache);
2403         nl_handle_destroy(drv->nl_handle);
2404         nl_cb_put(drv->nl_cb);
2405
2406         if (drv->if_indices != drv->default_if_indices)
2407                 free(drv->if_indices);
2408
2409         free(drv);
2410 }
2411
2412
2413 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2414         .name = "nl80211",
2415         .init = i802_init,
2416         .init_bssid = i802_init_bssid,
2417         .deinit = i802_deinit,
2418         .wireless_event_init = i802_wireless_event_init,
2419         .wireless_event_deinit = i802_wireless_event_deinit,
2420         .set_ieee8021x = i802_set_ieee8021x,
2421         .set_privacy = i802_set_privacy,
2422         .set_encryption = i802_set_encryption,
2423         .get_seqnum = i802_get_seqnum,
2424         .flush = i802_flush,
2425         .read_sta_data = i802_read_sta_data,
2426         .send_eapol = i802_send_eapol,
2427         .sta_set_flags = i802_sta_set_flags,
2428         .sta_deauth = i802_sta_deauth,
2429         .sta_disassoc = i802_sta_disassoc,
2430         .sta_remove = i802_sta_remove,
2431         .send_mgmt_frame = i802_send_mgmt_frame,
2432         .sta_add2 = i802_sta_add2,
2433         .get_inact_sec = i802_get_inact_sec,
2434         .sta_clear_stats = i802_sta_clear_stats,
2435         .set_freq2 = i802_set_freq2,
2436         .set_rts = i802_set_rts,
2437         .get_rts = i802_get_rts,
2438         .set_frag = i802_set_frag,
2439         .get_frag = i802_get_frag,
2440         .set_retry = i802_set_retry,
2441         .get_retry = i802_get_retry,
2442         .set_rate_sets = i802_set_rate_sets,
2443         .set_regulatory_domain = i802_set_regulatory_domain,
2444         .set_beacon = i802_set_beacon,
2445         .set_internal_bridge = i802_set_internal_bridge,
2446         .set_beacon_int = i802_set_beacon_int,
2447         .set_dtim_period = i802_set_dtim_period,
2448         .set_cts_protect = i802_set_cts_protect,
2449         .set_preamble = i802_set_preamble,
2450         .set_short_slot_time = i802_set_short_slot_time,
2451         .set_tx_queue_params = i802_set_tx_queue_params,
2452         .bss_add = i802_bss_add,
2453         .bss_remove = i802_bss_remove,
2454         .if_add = i802_if_add,
2455         .if_update = i802_if_update,
2456         .if_remove = i802_if_remove,
2457         .get_hw_feature_data = i802_get_hw_feature_data,
2458         .set_sta_vlan = i802_set_sta_vlan,
2459         .set_country = i802_set_country,
2460 };