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_freq(void *priv, int mode, int freq)
 465 {
 466         struct i802_driver_data *drv = priv;
 467         struct iwreq iwr;
 468
 469         memset(&iwr, 0, sizeof(iwr));
 470         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 471         iwr.u.freq.m = freq;
 472         iwr.u.freq.e = 6;
 473
 474         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 475                 perror("ioctl[SIOCSIWFREQ]");
 476                 return -1;
 477         }
 478
 479         return 0;
 480 }
 481
 482
 483 static int i802_set_rts(void *priv, int rts)
 484 {
 485         struct i802_driver_data *drv = priv;
 486         struct iwreq iwr;
 487
 488         memset(&iwr, 0, sizeof(iwr));
 489         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 490         iwr.u.rts.value = rts;
 491         iwr.u.rts.fixed = 1;
 492
 493         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
 494                 perror("ioctl[SIOCSIWRTS]");
 495                 return -1;
 496         }
 497
 498         return 0;
 499 }
 500
 501
 502 static int i802_get_rts(void *priv, int *rts)
 503 {
 504         struct i802_driver_data *drv = priv;
 505         struct iwreq iwr;
 506
 507         memset(&iwr, 0, sizeof(iwr));
 508         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 509
 510         if (ioctl(drv->ioctl_sock, SIOCGIWRTS, &iwr) < 0) {
 511                 perror("ioctl[SIOCGIWRTS]");
 512                 return -1;
 513         }
 514
 515         *rts = iwr.u.rts.value;
 516
 517         return 0;
 518 }
 519
 520
 521 static int i802_set_frag(void *priv, int frag)
 522 {
 523         struct i802_driver_data *drv = priv;
 524         struct iwreq iwr;
 525
 526         memset(&iwr, 0, sizeof(iwr));
 527         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 528         iwr.u.frag.value = frag;
 529         iwr.u.frag.fixed = 1;
 530
 531         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 532                 perror("ioctl[SIOCSIWFRAG]");
 533                 return -1;
 534         }
 535
 536         return 0;
 537 }
 538
 539
 540 static int i802_get_frag(void *priv, int *frag)
 541 {
 542         struct i802_driver_data *drv = priv;
 543         struct iwreq iwr;
 544
 545         memset(&iwr, 0, sizeof(iwr));
 546         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 547
 548         if (ioctl(drv->ioctl_sock, SIOCGIWFRAG, &iwr) < 0) {
 549                 perror("ioctl[SIOCGIWFRAG]");
 550                 return -1;
 551         }
 552
 553         *frag = iwr.u.frag.value;
 554
 555         return 0;
 556 }
 557
 558
 559 static int i802_set_retry(void *priv, int short_retry, int long_retry)
 560 {
 561         struct i802_driver_data *drv = priv;
 562         struct iwreq iwr;
 563
 564         memset(&iwr, 0, sizeof(iwr));
 565         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 566
 567         iwr.u.retry.value = short_retry;
 568         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 569         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 570                 perror("ioctl[SIOCSIWRETRY(short)]");
 571                 return -1;
 572         }
 573
 574         iwr.u.retry.value = long_retry;
 575         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 576         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 577                 perror("ioctl[SIOCSIWRETRY(long)]");
 578                 return -1;
 579         }
 580
 581         return 0;
 582 }
 583
 584
 585 static int i802_get_retry(void *priv, int *short_retry, int *long_retry)
 586 {
 587         struct i802_driver_data *drv = priv;
 588         struct iwreq iwr;
 589
 590         memset(&iwr, 0, sizeof(iwr));
 591         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 592
 593         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 594         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 595                 perror("ioctl[SIOCGIWFRAG(short)]");
 596                 return -1;
 597         }
 598         *short_retry = iwr.u.retry.value;
 599
 600         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 601         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 602                 perror("ioctl[SIOCGIWFRAG(long)]");
 603                 return -1;
 604         }
 605         *long_retry = iwr.u.retry.value;
 606
 607         return 0;
 608 }
 609
 610
 611 static int i802_flush(void *priv)
 612 {
 613         struct i802_driver_data *drv = priv;
 614         struct nl_msg *msg;
 615
 616         msg = nlmsg_alloc();
 617         if (!msg)
 618                 return -1;
 619
 620         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 621                     0, NL80211_CMD_DEL_STATION, 0);
 622
 623         /*
 624          * XXX: FIX! this needs to flush all VLANs too
 625          */
 626         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 627                     if_nametoindex(drv->iface));
 628
 629         return send_and_recv_msgs(drv, msg, NULL, NULL);
 630  nla_put_failure:
 631         return -ENOBUFS;
 632 }
 633
 634
 635 static int get_sta_handler(struct nl_msg *msg, void *arg)
 636 {
 637         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 638         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 639         struct hostap_sta_driver_data *data = arg;
 640         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
 641         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 642                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
 643                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
 644                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
 645         };
 646
 647         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 648                   genlmsg_attrlen(gnlh, 0), NULL);
 649
 650         /*
 651          * TODO: validate the interface and mac address!
 652          * Otherwise, there's a race condition as soon as
 653          * the kernel starts sending station notifications.
 654          */
 655
 656         if (!tb[NL80211_ATTR_STA_INFO]) {
 657                 wpa_printf(MSG_DEBUG, "sta stats missing!");
 658                 return NL_SKIP;
 659         }
 660         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
 661                              tb[NL80211_ATTR_STA_INFO],
 662                              stats_policy)) {
 663                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
 664                 return NL_SKIP;
 665         }
 666
 667         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
 668                 data->inactive_msec =
 669                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
 670         if (stats[NL80211_STA_INFO_RX_BYTES])
 671                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
 672         if (stats[NL80211_STA_INFO_TX_BYTES])
 673                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
 674
 675         return NL_SKIP;
 676 }
 677
 678 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
 679                               const u8 *addr)
 680 {
 681         struct i802_driver_data *drv = priv;
 682         struct nl_msg *msg;
 683
 684         msg = nlmsg_alloc();
 685         if (!msg)
 686                 return -ENOMEM;
 687
 688         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 689                     0, NL80211_CMD_GET_STATION, 0);
 690
 691         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 692         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 693
 694         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
 695  nla_put_failure:
 696         return -ENOBUFS;
 697 }
 698
 699
 700 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
 701                            size_t data_len, int encrypt, const u8 *own_addr)
 702 {
 703         struct i802_driver_data *drv = priv;
 704         struct ieee80211_hdr *hdr;
 705         size_t len;
 706         u8 *pos;
 707         int res;
 708 #if 0 /* FIX */
 709         int qos = sta->flags & WLAN_STA_WME;
 710 #else
 711         int qos = 0;
 712 #endif
 713
 714         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
 715                 data_len;
 716         hdr = os_zalloc(len);
 717         if (hdr == NULL) {
 718                 printf("malloc() failed for i802_send_data(len=%lu)\n",
 719                        (unsigned long) len);
 720                 return -1;
 721         }
 722
 723         hdr->frame_control =
 724                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 725         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
 726         if (encrypt)
 727                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
 728 #if 0 /* To be enabled if qos determination is added above */
 729         if (qos) {
 730                 hdr->frame_control |=
 731                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
 732         }
 733 #endif
 734
 735         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
 736         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
 737         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
 738         pos = (u8 *) (hdr + 1);
 739
 740 #if 0 /* To be enabled if qos determination is added above */
 741         if (qos) {
 742                 /* add an empty QoS header if needed */
 743                 pos[0] = 0;
 744                 pos[1] = 0;
 745                 pos += 2;
 746         }
 747 #endif
 748
 749         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
 750         pos += sizeof(rfc1042_header);
 751         WPA_PUT_BE16(pos, ETH_P_PAE);
 752         pos += 2;
 753         memcpy(pos, data, data_len);
 754
 755         res = i802_send_frame(drv, (u8 *) hdr, len, encrypt, 0);
 756         free(hdr);
 757
 758         if (res < 0) {
 759                 perror("i802_send_eapol: send");
 760                 printf("i802_send_eapol - packet len: %lu - failed\n",
 761                        (unsigned long) len);
 762         }
 763
 764         return res;
 765 }
 766
 767
 768 static int i802_sta_add2(const char *ifname, void *priv,
 769                          struct hostapd_sta_add_params *params)
 770 {
 771         struct i802_driver_data *drv = priv;
 772         struct nl_msg *msg;
 773         int ret = -ENOBUFS;
 774
 775         msg = nlmsg_alloc();
 776         if (!msg)
 777                 return -ENOMEM;
 778
 779         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 780                     0, NL80211_CMD_NEW_STATION, 0);
 781
 782         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 783                     if_nametoindex(drv->iface));
 784         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
 785         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
 786         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
 787                 params->supp_rates);
 788         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
 789                     params->listen_interval);
 790
 791 #ifdef CONFIG_IEEE80211N
 792 #ifdef NL80211_ATTR_HT_CAPABILITY
 793         if (params->ht_capabilities) {
 794                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
 795                         params->ht_capabilities->length,
 796                         &params->ht_capabilities->data);
 797         }
 798 #endif /* NL80211_ATTR_HT_CAPABILITY */
 799 #endif /* CONFIG_IEEE80211N */
 800
 801         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 802         if (ret == -EEXIST)
 803                 ret = 0;
 804  nla_put_failure:
 805         return ret;
 806 }
 807
 808
 809 static int i802_sta_remove(void *priv, const u8 *addr)
 810 {
 811         struct i802_driver_data *drv = priv;
 812         struct nl_msg *msg;
 813         int ret;
 814
 815         msg = nlmsg_alloc();
 816         if (!msg)
 817                 return -ENOMEM;
 818
 819         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 820                     0, NL80211_CMD_DEL_STATION, 0);
 821
 822         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 823                     if_nametoindex(drv->iface));
 824         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 825
 826         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 827         if (ret == -ENOENT)
 828                 return 0;
 829         return ret;
 830  nla_put_failure:
 831         return -ENOBUFS;
 832 }
 833
 834
 835 static int i802_sta_set_flags(void *priv, const u8 *addr,
 836                               int total_flags, int flags_or, int flags_and)
 837 {
 838         struct i802_driver_data *drv = priv;
 839         struct nl_msg *msg, *flags = NULL;
 840
 841         msg = nlmsg_alloc();
 842         if (!msg)
 843                 return -ENOMEM;
 844
 845         flags = nlmsg_alloc();
 846         if (!flags) {
 847                 nlmsg_free(msg);
 848                 return -ENOMEM;
 849         }
 850
 851         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 852                     0, NL80211_CMD_SET_STATION, 0);
 853
 854         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 855                     if_nametoindex(drv->iface));
 856         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 857
 858         if (total_flags & WLAN_STA_AUTHORIZED || !drv->ieee802_1x_active)
 859                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
 860
 861         if (total_flags & WLAN_STA_WME)
 862                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
 863
 864         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
 865                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
 866
 867 #ifdef NL80211_MFP_PENDING
 868         if (total_flags & WLAN_STA_MFP)
 869                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
 870 #endif /* NL80211_MFP_PENDING */
 871
 872         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
 873                 goto nla_put_failure;
 874
 875         nlmsg_free(flags);
 876
 877         return send_and_recv_msgs(drv, msg, NULL, NULL);
 878  nla_put_failure:
 879         nlmsg_free(flags);
 880         return -ENOBUFS;
 881 }
 882
 883
 884 static int i802_set_regulatory_domain(void *priv, unsigned int rd)
 885 {
 886         return -1;
 887 }
 888
 889
 890 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
 891                                     int cw_min, int cw_max, int burst_time)
 892 {
 893 #ifdef NL80211_ATTR_WIPHY_TXQ_PARAMS
 894         struct i802_driver_data *drv = priv;
 895         struct nl_msg *msg;
 896         struct nlattr *txq, *params;
 897
 898         msg = nlmsg_alloc();
 899         if (!msg)
 900                 return -1;
 901
 902         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 903                     0, NL80211_CMD_SET_WIPHY, 0);
 904
 905         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 906
 907         txq = nla_nest_start(msg, NL80211_ATTR_WIPHY_TXQ_PARAMS);
 908         if (!txq)
 909                 goto nla_put_failure;
 910
 911         /* We are only sending parameters for a single TXQ at a time */
 912         params = nla_nest_start(msg, 1);
 913         if (!params)
 914                 goto nla_put_failure;
 915
 916         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_QUEUE, queue);
 917         /* Burst time is configured in units of 0.1 msec and TXOP parameter in
 918          * 32 usec, so need to convert the value here. */
 919         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_TXOP, (burst_time * 100 + 16) / 32);
 920         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMIN, cw_min);
 921         NLA_PUT_U16(msg, NL80211_TXQ_ATTR_CWMAX, cw_max);
 922         NLA_PUT_U8(msg, NL80211_TXQ_ATTR_AIFS, aifs);
 923
 924         nla_nest_end(msg, params);
 925
 926         nla_nest_end(msg, txq);
 927
 928         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
 929                 return 0;
 930  nla_put_failure:
 931         return -1;
 932 #else /* NL80211_ATTR_WIPHY_TXQ_PARAMS */
 933         return -1;
 934 #endif /* NL80211_ATTR_WIPHY_TXQ_PARAMS */
 935 }
 936
 937
 938 static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
 939 {
 940         struct nl_msg *msg;
 941
 942         /* stop listening for EAPOL on this interface */
 943         del_ifidx(drv, ifidx);
 944
 945         msg = nlmsg_alloc();
 946         if (!msg)
 947                 goto nla_put_failure;
 948
 949         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 950                     0, NL80211_CMD_DEL_INTERFACE, 0);
 951         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
 952
 953         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
 954                 return;
 955  nla_put_failure:
 956         printf("Failed to remove interface.\n");
 957 }
 958
 959
 960 static int nl80211_create_iface(struct i802_driver_data *drv,
 961                                 const char *ifname,
 962                                 enum nl80211_iftype iftype,
 963                                 const u8 *addr)
 964 {
 965         struct nl_msg *msg, *flags = NULL;
 966         int ifidx;
 967         struct ifreq ifreq;
 968         struct iwreq iwr;
 969         int ret = -ENOBUFS;
 970
 971         msg = nlmsg_alloc();
 972         if (!msg)
 973                 return -1;
 974
 975         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 976                     0, NL80211_CMD_NEW_INTERFACE, 0);
 977         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 978                     if_nametoindex(drv->hapd->conf->iface));
 979         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
 980         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
 981
 982         if (iftype == NL80211_IFTYPE_MONITOR) {
 983                 int err;
 984
 985                 flags = nlmsg_alloc();
 986                 if (!flags)
 987                         goto nla_put_failure;
 988
 989                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
 990
 991                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
 992
 993                 nlmsg_free(flags);
 994
 995                 if (err)
 996                         goto nla_put_failure;
 997         }
 998
 999         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1000         if (ret) {
1001  nla_put_failure:
1002                 printf("Failed to create interface %s.\n", ifname);
1003                 return ret;
1004         }
1005
1006         ifidx = if_nametoindex(ifname);
1007
1008         if (ifidx <= 0)
1009                 return -1;
1010
1011         /* start listening for EAPOL on this interface */
1012         add_ifidx(drv, ifidx);
1013
1014         if (addr) {
1015                 switch (iftype) {
1016                 case NL80211_IFTYPE_AP:
1017                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
1018                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
1019                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1020
1021                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
1022                                 nl80211_remove_iface(drv, ifidx);
1023                                 return -1;
1024                         }
1025                         break;
1026                 case NL80211_IFTYPE_WDS:
1027                         memset(&iwr, 0, sizeof(iwr));
1028                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1029                         iwr.u.addr.sa_family = ARPHRD_ETHER;
1030                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
1031                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
1032                                 return -1;
1033                         break;
1034                 default:
1035                         /* nothing */
1036                         break;
1037                 }
1038         }
1039
1040         return ifidx;
1041 }
1042
1043
1044 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
1045 {
1046         int ifidx;
1047
1048         /*
1049          * The kernel supports that when the low-level driver does,
1050          * but we currently don't because we need per-BSS data that
1051          * currently we can't handle easily.
1052          */
1053         return -1;
1054
1055         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
1056         if (ifidx < 0)
1057                 return -1;
1058         if (hostapd_set_iface_flags(priv, ifname, 1)) {
1059                 nl80211_remove_iface(priv, ifidx);
1060                 return -1;
1061         }
1062         return 0;
1063 }
1064
1065
1066 static int i802_bss_remove(void *priv, const char *ifname)
1067 {
1068         nl80211_remove_iface(priv, if_nametoindex(ifname));
1069         return 0;
1070 }
1071
1072
1073 static int i802_set_beacon(const char *iface, void *priv,
1074                            u8 *head, size_t head_len,
1075                            u8 *tail, size_t tail_len)
1076 {
1077         struct i802_driver_data *drv = priv;
1078         struct nl_msg *msg;
1079         u8 cmd = NL80211_CMD_NEW_BEACON;
1080         int ret;
1081
1082         msg = nlmsg_alloc();
1083         if (!msg)
1084                 return -ENOMEM;
1085
1086         if (drv->beacon_set)
1087                 cmd = NL80211_CMD_SET_BEACON;
1088
1089         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1090                     0, cmd, 0);
1091         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1092         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1093         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1094         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
1095
1096         if (!drv->dtim_period)
1097                 drv->dtim_period = 2;
1098         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1099
1100         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1101         if (!ret)
1102                 drv->beacon_set = 1;
1103         return ret;
1104  nla_put_failure:
1105         return -ENOBUFS;
1106 }
1107
1108
1109 static int i802_del_beacon(struct i802_driver_data *drv)
1110 {
1111         struct nl_msg *msg;
1112
1113         msg = nlmsg_alloc();
1114         if (!msg)
1115                 return -ENOMEM;
1116
1117         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1118                     0, NL80211_CMD_DEL_BEACON, 0);
1119         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1120
1121         return send_and_recv_msgs(drv, msg, NULL, NULL);
1122  nla_put_failure:
1123         return -ENOBUFS;
1124 }
1125
1126
1127 static int i802_set_ieee8021x(const char *ifname, void *priv, int enabled)
1128 {
1129         struct i802_driver_data *drv = priv;
1130
1131         /*
1132          * FIXME: This needs to be per interface (BSS)
1133          */
1134         drv->ieee802_1x_active = enabled;
1135         return 0;
1136 }
1137
1138
1139 static int i802_set_privacy(const char *ifname, void *priv, int enabled)
1140 {
1141         struct i802_driver_data *drv = priv;
1142         struct iwreq iwr;
1143
1144         memset(&iwr, 0, sizeof(iwr));
1145
1146         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1147         iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
1148         iwr.u.param.value = enabled;
1149
1150         ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
1151
1152         /* ignore errors, the kernel/driver might not care */
1153         return 0;
1154 }
1155
1156
1157 static int i802_set_internal_bridge(void *priv, int value)
1158 {
1159         return -1;
1160 }
1161
1162
1163 static int i802_set_beacon_int(void *priv, int value)
1164 {
1165         struct i802_driver_data *drv = priv;
1166         struct nl_msg *msg;
1167
1168         drv->beacon_int = value;
1169
1170         if (!drv->beacon_set)
1171                 return 0;
1172
1173         msg = nlmsg_alloc();
1174         if (!msg)
1175                 return -ENOMEM;
1176
1177         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1178                     0, NL80211_CMD_SET_BEACON, 0);
1179         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1180
1181         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
1182
1183         return send_and_recv_msgs(drv, msg, NULL, NULL);
1184  nla_put_failure:
1185         return -ENOBUFS;
1186 }
1187
1188
1189 static int i802_set_dtim_period(const char *iface, void *priv, int value)
1190 {
1191         struct i802_driver_data *drv = priv;
1192         struct nl_msg *msg;
1193
1194         msg = nlmsg_alloc();
1195         if (!msg)
1196                 return -ENOMEM;
1197
1198         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1199                     0, NL80211_CMD_SET_BEACON, 0);
1200         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1201
1202         drv->dtim_period = value;
1203         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1204
1205         return send_and_recv_msgs(drv, msg, NULL, NULL);
1206  nla_put_failure:
1207         return -ENOBUFS;
1208 }
1209
1210
1211 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
1212 {
1213 #ifdef NL80211_CMD_SET_BSS
1214         struct i802_driver_data *drv = priv;
1215         struct nl_msg *msg;
1216
1217         msg = nlmsg_alloc();
1218         if (!msg)
1219                 return -ENOMEM;
1220
1221         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1222                     NL80211_CMD_SET_BSS, 0);
1223
1224         if (cts >= 0)
1225                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
1226         if (preamble >= 0)
1227                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
1228         if (slot >= 0)
1229                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
1230
1231         /* TODO: multi-BSS support */
1232         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1233
1234         return send_and_recv_msgs(drv, msg, NULL, NULL);
1235  nla_put_failure:
1236         return -ENOBUFS;
1237 #else /* NL80211_CMD_SET_BSS */
1238         return -1;
1239 #endif /* NL80211_CMD_SET_BSS */
1240 }
1241
1242
1243 static int i802_set_cts_protect(void *priv, int value)
1244 {
1245         return i802_set_bss(priv, value, -1, -1);
1246 }
1247
1248
1249 static int i802_set_preamble(void *priv, int value)
1250 {
1251         return i802_set_bss(priv, -1, value, -1);
1252 }
1253
1254
1255 static int i802_set_short_slot_time(void *priv, int value)
1256 {
1257         return i802_set_bss(priv, -1, -1, value);
1258 }
1259
1260
1261 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
1262 {
1263         switch (type) {
1264         case HOSTAPD_IF_VLAN:
1265                 return NL80211_IFTYPE_AP_VLAN;
1266         case HOSTAPD_IF_WDS:
1267                 return NL80211_IFTYPE_WDS;
1268         }
1269         return -1;
1270 }
1271
1272
1273 static int i802_if_add(const char *iface, void *priv,
1274                        enum hostapd_driver_if_type type, char *ifname,
1275                        const u8 *addr)
1276 {
1277         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
1278                 return -1;
1279         return 0;
1280 }
1281
1282
1283 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
1284                           char *ifname, const u8 *addr)
1285 {
1286         /* unused at the moment */
1287         return -1;
1288 }
1289
1290
1291 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
1292                           const char *ifname, const u8 *addr)
1293 {
1294         nl80211_remove_iface(priv, if_nametoindex(ifname));
1295         return 0;
1296 }
1297
1298
1299 struct phy_info_arg {
1300         u16 *num_modes;
1301         struct hostapd_hw_modes *modes;
1302 };
1303
1304 static int phy_info_handler(struct nl_msg *msg, void *arg)
1305 {
1306         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1307         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1308         struct phy_info_arg *phy_info = arg;
1309
1310         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1311
1312         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1313         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1314                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1315                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1316                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1317                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1318                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1319         };
1320
1321         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1322         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1323                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1324                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1325         };
1326
1327         struct nlattr *nl_band;
1328         struct nlattr *nl_freq;
1329         struct nlattr *nl_rate;
1330         int rem_band, rem_freq, rem_rate;
1331         struct hostapd_hw_modes *mode;
1332         int idx, mode_is_set;
1333
1334         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1335                   genlmsg_attrlen(gnlh, 0), NULL);
1336
1337         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1338                 return NL_SKIP;
1339
1340         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1341                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1342                 if (!mode)
1343                         return NL_SKIP;
1344                 phy_info->modes = mode;
1345
1346                 mode_is_set = 0;
1347
1348                 mode = &phy_info->modes[*(phy_info->num_modes)];
1349                 memset(mode, 0, sizeof(*mode));
1350                 *(phy_info->num_modes) += 1;
1351
1352                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1353                           nla_len(nl_band), NULL);
1354
1355                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1356                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1357                                   nla_len(nl_freq), freq_policy);
1358                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1359                                 continue;
1360                         mode->num_channels++;
1361                 }
1362
1363                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1364                 if (!mode->channels)
1365                         return NL_SKIP;
1366
1367                 idx = 0;
1368
1369                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1370                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1371                                   nla_len(nl_freq), freq_policy);
1372                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1373                                 continue;
1374
1375                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1376                         mode->channels[idx].flag = 0;
1377
1378                         if (!mode_is_set) {
1379                                 /* crude heuristic */
1380                                 if (mode->channels[idx].freq < 4000)
1381                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1382                                 else
1383                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1384                                 mode_is_set = 1;
1385                         }
1386
1387                         /* crude heuristic */
1388                         if (mode->channels[idx].freq < 4000)
1389                                 if (mode->channels[idx].freq == 2848)
1390                                         mode->channels[idx].chan = 14;
1391                                 else
1392                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1393                         else
1394                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1395
1396                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1397                                 mode->channels[idx].flag |=
1398                                         HOSTAPD_CHAN_DISABLED;
1399                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1400                                 mode->channels[idx].flag |=
1401                                         HOSTAPD_CHAN_PASSIVE_SCAN;
1402                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1403                                 mode->channels[idx].flag |=
1404                                         HOSTAPD_CHAN_NO_IBSS;
1405                         if (tb_freq[NL80211_FREQUENCY_ATTR_RADAR])
1406                                 mode->channels[idx].flag |=
1407                                         HOSTAPD_CHAN_RADAR;
1408                         idx++;
1409                 }
1410
1411                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1412                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1413                                   nla_len(nl_rate), rate_policy);
1414                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1415                                 continue;
1416                         mode->num_rates++;
1417                 }
1418
1419                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1420                 if (!mode->rates)
1421                         return NL_SKIP;
1422
1423                 idx = 0;
1424
1425                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1426                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1427                                   nla_len(nl_rate), rate_policy);
1428                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1429                                 continue;
1430                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1431
1432                         /* crude heuristic */
1433                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1434                             mode->rates[idx].rate > 200)
1435                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1436
1437                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1438                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1439
1440                         idx++;
1441                 }
1442         }
1443
1444         return NL_SKIP;
1445 }
1446
1447 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
1448                                                          u16 *num_modes,
1449                                                          u16 *flags)
1450 {
1451         struct i802_driver_data *drv = priv;
1452         struct nl_msg *msg;
1453         struct phy_info_arg result = {
1454                 .num_modes = num_modes,
1455                 .modes = NULL,
1456         };
1457
1458         *num_modes = 0;
1459         *flags = 0;
1460
1461         msg = nlmsg_alloc();
1462         if (!msg)
1463                 return NULL;
1464
1465         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1466                     0, NL80211_CMD_GET_WIPHY, 0);
1467
1468         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1469
1470         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1471                 return result.modes;
1472  nla_put_failure:
1473         return NULL;
1474 }
1475
1476
1477 static int i802_set_sta_vlan(void *priv, const u8 *addr,
1478                              const char *ifname, int vlan_id)
1479 {
1480         struct i802_driver_data *drv = priv;
1481         struct nl_msg *msg;
1482
1483         msg = nlmsg_alloc();
1484         if (!msg)
1485                 return -ENOMEM;
1486
1487         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1488                     0, NL80211_CMD_SET_STATION, 0);
1489
1490         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1491                     if_nametoindex(drv->iface));
1492         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1493         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1494                     if_nametoindex(ifname));
1495
1496         return send_and_recv_msgs(drv, msg, NULL, NULL);
1497  nla_put_failure:
1498         return -ENOBUFS;
1499 }
1500
1501
1502 static void handle_unknown_sta(struct hostapd_data *hapd, u8 *ta)
1503 {
1504         struct sta_info *sta;
1505
1506         sta = ap_get_sta(hapd, ta);
1507         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
1508                 printf("Data/PS-poll frame from not associated STA "
1509                        MACSTR "\n", MAC2STR(ta));
1510                 if (sta && (sta->flags & WLAN_STA_AUTH))
1511                         hostapd_sta_disassoc(
1512                                 hapd, ta,
1513                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1514                 else
1515                         hostapd_sta_deauth(
1516                                 hapd, ta,
1517                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1518         }
1519 }
1520
1521
1522 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
1523                                int ok)
1524 {
1525         struct ieee80211_hdr *hdr;
1526         u16 fc, type, stype;
1527         struct sta_info *sta;
1528
1529         hdr = (struct ieee80211_hdr *) buf;
1530         fc = le_to_host16(hdr->frame_control);
1531
1532         type = WLAN_FC_GET_TYPE(fc);
1533         stype = WLAN_FC_GET_STYPE(fc);
1534
1535         switch (type) {
1536         case WLAN_FC_TYPE_MGMT:
1537                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
1538                            ok ? "ACK" : "fail");
1539                 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
1540                 break;
1541         case WLAN_FC_TYPE_CTRL:
1542                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
1543                            ok ? "ACK" : "fail");
1544                 break;
1545         case WLAN_FC_TYPE_DATA:
1546                 wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
1547                            ok ? "ACK" : "fail");
1548                 sta = ap_get_sta(hapd, hdr->addr1);
1549                 if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
1550                         wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
1551                                    "activity poll", MAC2STR(sta->addr),
1552                                    ok ? "ACKed" : "did not ACK");
1553                         if (ok)
1554                                 sta->flags &= ~WLAN_STA_PENDING_POLL;
1555                 }
1556                 if (sta)
1557                         ieee802_1x_tx_status(hapd, sta, buf, len, ok);
1558                 break;
1559         default:
1560                 printf("unknown TX callback frame type %d\n", type);
1561                 break;
1562         }
1563 }
1564
1565
1566 static void handle_frame(struct hostapd_iface *iface, u8 *buf, size_t len,
1567                          struct hostapd_frame_info *hfi,
1568                          enum ieee80211_msg_type msg_type)
1569 {
1570         struct ieee80211_hdr *hdr;
1571         u16 fc, type, stype;
1572         size_t data_len = len;
1573         struct hostapd_data *hapd = NULL;
1574         int broadcast_bssid = 0;
1575         size_t i;
1576         u8 *bssid;
1577
1578         /*
1579          * PS-Poll frames are 16 bytes. All other frames are
1580          * 24 bytes or longer.
1581          */
1582         if (len < 16)
1583                 return;
1584
1585         hdr = (struct ieee80211_hdr *) buf;
1586         fc = le_to_host16(hdr->frame_control);
1587
1588         type = WLAN_FC_GET_TYPE(fc);
1589         stype = WLAN_FC_GET_STYPE(fc);
1590
1591         switch (type) {
1592         case WLAN_FC_TYPE_DATA:
1593                 if (len < 24)
1594                         return;
1595                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
1596                 case WLAN_FC_TODS:
1597                         bssid = hdr->addr1;
1598                         break;
1599                 default:
1600                         /* discard */
1601                         return;
1602                 }
1603                 break;
1604         case WLAN_FC_TYPE_CTRL:
1605                 /* discard non-ps-poll frames */
1606                 if (stype != WLAN_FC_STYPE_PSPOLL)
1607                         return;
1608                 bssid = hdr->addr1;
1609                 break;
1610         case WLAN_FC_TYPE_MGMT:
1611                 bssid = hdr->addr3;
1612                 break;
1613         default:
1614                 /* discard */
1615                 return;
1616         }
1617
1618         /* find interface frame belongs to */
1619         for (i = 0; i < iface->num_bss; i++) {
1620                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
1621                         hapd = iface->bss[i];
1622                         break;
1623                 }
1624         }
1625
1626         if (hapd == NULL) {
1627                 hapd = iface->bss[0];
1628
1629                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
1630                     bssid[2] != 0xff || bssid[3] != 0xff ||
1631                     bssid[4] != 0xff || bssid[5] != 0xff) {
1632                         /*
1633                          * Unknown BSSID - drop frame if this is not from
1634                          * passive scanning or a beacon (at least ProbeReq
1635                          * frames to other APs may be allowed through RX
1636                          * filtering in the wlan hw/driver)
1637                          */
1638                         if ((type != WLAN_FC_TYPE_MGMT ||
1639                              stype != WLAN_FC_STYPE_BEACON))
1640                                 return;
1641                 } else
1642                         broadcast_bssid = 1;
1643         }
1644
1645         switch (msg_type) {
1646         case ieee80211_msg_normal:
1647                 /* continue processing */
1648                 break;
1649         case ieee80211_msg_tx_callback_ack:
1650                 handle_tx_callback(hapd, buf, data_len, 1);
1651                 return;
1652         case ieee80211_msg_tx_callback_fail:
1653                 handle_tx_callback(hapd, buf, data_len, 0);
1654                 return;
1655         }
1656
1657         switch (type) {
1658         case WLAN_FC_TYPE_MGMT:
1659                 if (stype != WLAN_FC_STYPE_BEACON &&
1660                     stype != WLAN_FC_STYPE_PROBE_REQ)
1661                         wpa_printf(MSG_MSGDUMP, "MGMT");
1662                 if (broadcast_bssid) {
1663                         for (i = 0; i < iface->num_bss; i++)
1664                                 ieee802_11_mgmt(iface->bss[i], buf, data_len,
1665                                                 stype, hfi);
1666                 } else
1667                         ieee802_11_mgmt(hapd, buf, data_len, stype, hfi);
1668                 break;
1669         case WLAN_FC_TYPE_CTRL:
1670                 /* can only get here with PS-Poll frames */
1671                 wpa_printf(MSG_DEBUG, "CTRL");
1672                 handle_unknown_sta(hapd, hdr->addr2);
1673                 break;
1674         case WLAN_FC_TYPE_DATA:
1675                 wpa_printf(MSG_DEBUG, "DATA");
1676                 handle_unknown_sta(hapd, hdr->addr2);
1677                 break;
1678         }
1679 }
1680
1681
1682 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
1683 {
1684         struct i802_driver_data *drv = eloop_ctx;
1685         struct hostapd_data *hapd = drv->hapd;
1686         struct sockaddr_ll lladdr;
1687         unsigned char buf[3000];
1688         int len;
1689         socklen_t fromlen = sizeof(lladdr);
1690
1691         len = recvfrom(sock, buf, sizeof(buf), 0,
1692                        (struct sockaddr *)&lladdr, &fromlen);
1693         if (len < 0) {
1694                 perror("recv");
1695                 return;
1696         }
1697
1698         if (have_ifidx(drv, lladdr.sll_ifindex))
1699                 ieee802_1x_receive(hapd, lladdr.sll_addr, buf, len);
1700 }
1701
1702
1703 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1704 {
1705         struct i802_driver_data *drv = eloop_ctx;
1706         int len;
1707         unsigned char buf[3000];
1708         struct hostapd_data *hapd = drv->hapd;
1709         struct ieee80211_radiotap_iterator iter;
1710         int ret;
1711         struct hostapd_frame_info hfi;
1712         int injected = 0, failed = 0, msg_type, rxflags = 0;
1713
1714         len = recv(sock, buf, sizeof(buf), 0);
1715         if (len < 0) {
1716                 perror("recv");
1717                 return;
1718         }
1719
1720         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
1721                 printf("received invalid radiotap frame\n");
1722                 return;
1723         }
1724
1725         memset(&hfi, 0, sizeof(hfi));
1726
1727         while (1) {
1728                 ret = ieee80211_radiotap_iterator_next(&iter);
1729                 if (ret == -ENOENT)
1730                         break;
1731                 if (ret) {
1732                         printf("received invalid radiotap frame (%d)\n", ret);
1733                         return;
1734                 }
1735                 switch (iter.this_arg_index) {
1736                 case IEEE80211_RADIOTAP_FLAGS:
1737                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1738                                 len -= 4;
1739                         break;
1740                 case IEEE80211_RADIOTAP_RX_FLAGS:
1741                         rxflags = 1;
1742                         break;
1743                 case IEEE80211_RADIOTAP_TX_FLAGS:
1744                         injected = 1;
1745                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
1746                                         IEEE80211_RADIOTAP_F_TX_FAIL;
1747                         break;
1748                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1749                         break;
1750                 case IEEE80211_RADIOTAP_CHANNEL:
1751                         /* TODO convert from freq/flags to channel number
1752                         hfi.channel = XXX;
1753                         hfi.phytype = XXX;
1754                          */
1755                         break;
1756                 case IEEE80211_RADIOTAP_RATE:
1757                         hfi.datarate = *iter.this_arg * 5;
1758                         break;
1759                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1760                         hfi.ssi_signal = *iter.this_arg;
1761                         break;
1762                 }
1763         }
1764
1765         if (rxflags && injected)
1766                 return;
1767
1768         if (!injected)
1769                 msg_type = ieee80211_msg_normal;
1770         else if (failed)
1771                 msg_type = ieee80211_msg_tx_callback_fail;
1772         else
1773                 msg_type = ieee80211_msg_tx_callback_ack;
1774
1775         handle_frame(hapd->iface, buf + iter.max_length,
1776                      len - iter.max_length, &hfi, msg_type);
1777 }
1778
1779
1780 static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
1781 {
1782         char buf[IFNAMSIZ];
1783         struct sockaddr_ll ll;
1784         int optval;
1785         socklen_t optlen;
1786
1787         snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
1788         buf[IFNAMSIZ - 1] = '\0';
1789
1790         drv->monitor_ifidx =
1791                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
1792
1793         if (drv->monitor_ifidx < 0)
1794                 return -1;
1795
1796         if (hostapd_set_iface_flags(drv, buf, 1))
1797                 goto error;
1798
1799         memset(&ll, 0, sizeof(ll));
1800         ll.sll_family = AF_PACKET;
1801         ll.sll_ifindex = drv->monitor_ifidx;
1802         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1803         if (drv->monitor_sock < 0) {
1804                 perror("socket[PF_PACKET,SOCK_RAW]");
1805                 goto error;
1806         }
1807
1808         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1809                  sizeof(ll)) < 0) {
1810                 perror("monitor socket bind");
1811                 goto error;
1812         }
1813
1814         optlen = sizeof(optval);
1815         optval = 20;
1816         if (setsockopt
1817             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1818                 perror("Failed to set socket priority");
1819                 goto error;
1820         }
1821
1822         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1823                                      drv, NULL)) {
1824                 printf("Could not register monitor read socket\n");
1825                 goto error;
1826         }
1827
1828         return 0;
1829  error:
1830         nl80211_remove_iface(drv, drv->monitor_ifidx);
1831         return -1;
1832 }
1833
1834
1835 static int nl80211_set_master_mode(struct i802_driver_data *drv,
1836                                    const char *ifname)
1837 {
1838         struct nl_msg *msg;
1839         int ret = -ENOBUFS;
1840
1841         msg = nlmsg_alloc();
1842         if (!msg)
1843                 return -ENOMEM;
1844
1845         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1846                     0, NL80211_CMD_SET_INTERFACE, 0);
1847         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1848                     if_nametoindex(ifname));
1849         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
1850
1851         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1852         if (!ret)
1853                 return 0;
1854  nla_put_failure:
1855         wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
1856                    "mode.", ifname);
1857         return ret;
1858 }
1859
1860
1861 static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
1862 {
1863         struct ifreq ifr;
1864         struct sockaddr_ll addr;
1865
1866         drv->ioctl_sock = -1;
1867
1868         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1869         if (drv->ioctl_sock < 0) {
1870                 perror("socket[PF_INET,SOCK_DGRAM]");
1871                 return -1;
1872         }
1873
1874         /* start listening for EAPOL on the default AP interface */
1875         add_ifidx(drv, if_nametoindex(drv->iface));
1876
1877         if (hostapd_set_iface_flags(drv, drv->iface, 0))
1878                 return -1;
1879
1880         if (bssid) {
1881                 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
1882                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
1883                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1884
1885                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
1886                         perror("ioctl(SIOCSIFHWADDR)");
1887                         return -1;
1888                 }
1889         }
1890
1891         /*
1892          * initialise generic netlink and nl80211
1893          */
1894         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1895         if (!drv->nl_cb) {
1896                 printf("Failed to allocate netlink callbacks.\n");
1897                 return -1;
1898         }
1899
1900         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1901         if (!drv->nl_handle) {
1902                 printf("Failed to allocate netlink handle.\n");
1903                 return -1;
1904         }
1905
1906         if (genl_connect(drv->nl_handle)) {
1907                 printf("Failed to connect to generic netlink.\n");
1908                 return -1;
1909         }
1910
1911         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1912         if (!drv->nl_cache) {
1913                 printf("Failed to allocate generic netlink cache.\n");
1914                 return -1;
1915         }
1916
1917         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1918         if (!drv->nl80211) {
1919                 printf("nl80211 not found.\n");
1920                 return -1;
1921         }
1922
1923         /* Initialise a monitor interface */
1924         if (nl80211_create_monitor_interface(drv))
1925                 return -1;
1926
1927         if (nl80211_set_master_mode(drv, drv->iface))
1928                 return -1;
1929
1930         if (hostapd_set_iface_flags(drv, drv->iface, 1))
1931                 return -1;
1932
1933         memset(&addr, 0, sizeof(addr));
1934         addr.sll_family = AF_PACKET;
1935         addr.sll_ifindex = ifr.ifr_ifindex;
1936         wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
1937                    addr.sll_ifindex);
1938
1939         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
1940         if (drv->eapol_sock < 0) {
1941                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
1942                 return -1;
1943         }
1944
1945         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
1946         {
1947                 printf("Could not register read socket for eapol\n");
1948                 return -1;
1949         }
1950
1951         memset(&ifr, 0, sizeof(ifr));
1952         os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
1953         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
1954                 perror("ioctl(SIOCGIFHWADDR)");
1955                 return -1;
1956         }
1957
1958         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
1959                 printf("Invalid HW-addr family 0x%04x\n",
1960                        ifr.ifr_hwaddr.sa_family);
1961                 return -1;
1962         }
1963         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
1964
1965         return 0;
1966 }
1967
1968
1969 static int i802_get_inact_sec(void *priv, const u8 *addr)
1970 {
1971         struct hostap_sta_driver_data data;
1972         int ret;
1973
1974         data.inactive_msec = (unsigned long) -1;
1975         ret = i802_read_sta_data(priv, &data, addr);
1976         if (ret || data.inactive_msec == (unsigned long) -1)
1977                 return -1;
1978         return data.inactive_msec / 1000;
1979 }
1980
1981
1982 static int i802_sta_clear_stats(void *priv, const u8 *addr)
1983 {
1984 #if 0
1985         /* TODO */
1986 #endif
1987         return 0;
1988 }
1989
1990
1991 static void
1992 hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
1993                                        char *custom)
1994 {
1995         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
1996
1997         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
1998                 char *pos;
1999                 u8 addr[ETH_ALEN];
2000                 pos = strstr(custom, "addr=");
2001                 if (pos == NULL) {
2002                         wpa_printf(MSG_DEBUG,
2003                                    "MLME-MICHAELMICFAILURE.indication "
2004                                    "without sender address ignored");
2005                         return;
2006                 }
2007                 pos += 5;
2008                 if (hwaddr_aton(pos, addr) == 0) {
2009                         ieee80211_michael_mic_failure(drv->hapd, addr, 1);
2010                 } else {
2011                         wpa_printf(MSG_DEBUG,
2012                                    "MLME-MICHAELMICFAILURE.indication "
2013                                    "with invalid MAC address");
2014                 }
2015         }
2016 }
2017
2018
2019 static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
2020                                             char *data, int len)
2021 {
2022         struct iw_event iwe_buf, *iwe = &iwe_buf;
2023         char *pos, *end, *custom, *buf;
2024
2025         pos = data;
2026         end = data + len;
2027
2028         while (pos + IW_EV_LCP_LEN <= end) {
2029                 /* Event data may be unaligned, so make a local, aligned copy
2030                  * before processing. */
2031                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2032                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
2033                            iwe->cmd, iwe->len);
2034                 if (iwe->len <= IW_EV_LCP_LEN)
2035                         return;
2036
2037                 custom = pos + IW_EV_POINT_LEN;
2038                 if (drv->we_version > 18 &&
2039                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
2040                      iwe->cmd == IWEVCUSTOM)) {
2041                         /* WE-19 removed the pointer from struct iw_point */
2042                         char *dpos = (char *) &iwe_buf.u.data.length;
2043                         int dlen = dpos - (char *) &iwe_buf;
2044                         memcpy(dpos, pos + IW_EV_LCP_LEN,
2045                                sizeof(struct iw_event) - dlen);
2046                 } else {
2047                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2048                         custom += IW_EV_POINT_OFF;
2049                 }
2050
2051                 switch (iwe->cmd) {
2052                 case IWEVCUSTOM:
2053                         if (custom + iwe->u.data.length > end)
2054                                 return;
2055                         buf = malloc(iwe->u.data.length + 1);
2056                         if (buf == NULL)
2057                                 return;
2058                         memcpy(buf, custom, iwe->u.data.length);
2059                         buf[iwe->u.data.length] = '\0';
2060                         hostapd_wireless_event_wireless_custom(drv, buf);
2061                         free(buf);
2062                         break;
2063                 }
2064
2065                 pos += iwe->len;
2066         }
2067 }
2068
2069
2070 static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
2071                                                struct nlmsghdr *h, int len)
2072 {
2073         struct ifinfomsg *ifi;
2074         int attrlen, nlmsg_len, rta_len;
2075         struct rtattr *attr;
2076
2077         if (len < (int) sizeof(*ifi))
2078                 return;
2079
2080         ifi = NLMSG_DATA(h);
2081
2082         /* TODO: use ifi->ifi_index to filter out wireless events from other
2083          * interfaces */
2084
2085         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2086
2087         attrlen = h->nlmsg_len - nlmsg_len;
2088         if (attrlen < 0)
2089                 return;
2090
2091         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
2092
2093         rta_len = RTA_ALIGN(sizeof(struct rtattr));
2094         while (RTA_OK(attr, attrlen)) {
2095                 if (attr->rta_type == IFLA_WIRELESS) {
2096                         hostapd_wireless_event_wireless(
2097                                 drv, ((char *) attr) + rta_len,
2098                                 attr->rta_len - rta_len);
2099                 }
2100                 attr = RTA_NEXT(attr, attrlen);
2101         }
2102 }
2103
2104
2105 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
2106                                            void *sock_ctx)
2107 {
2108         char buf[256];
2109         int left;
2110         struct sockaddr_nl from;
2111         socklen_t fromlen;
2112         struct nlmsghdr *h;
2113         struct i802_driver_data *drv = eloop_ctx;
2114
2115         fromlen = sizeof(from);
2116         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
2117                         (struct sockaddr *) &from, &fromlen);
2118         if (left < 0) {
2119                 if (errno != EINTR && errno != EAGAIN)
2120                         perror("recvfrom(netlink)");
2121                 return;
2122         }
2123
2124         h = (struct nlmsghdr *) buf;
2125         while (left >= (int) sizeof(*h)) {
2126                 int len, plen;
2127
2128                 len = h->nlmsg_len;
2129                 plen = len - sizeof(*h);
2130                 if (len > left || plen < 0) {
2131                         printf("Malformed netlink message: "
2132                                "len=%d left=%d plen=%d\n",
2133                                len, left, plen);
2134                         break;
2135                 }
2136
2137                 switch (h->nlmsg_type) {
2138                 case RTM_NEWLINK:
2139                         hostapd_wireless_event_rtm_newlink(drv, h, plen);
2140                         break;
2141                 }
2142
2143                 len = NLMSG_ALIGN(len);
2144                 left -= len;
2145                 h = (struct nlmsghdr *) ((char *) h + len);
2146         }
2147
2148         if (left > 0) {
2149                 printf("%d extra bytes in the end of netlink message\n", left);
2150         }
2151 }
2152
2153
2154 static int hostap_get_we_version(struct i802_driver_data *drv)
2155 {
2156         struct iw_range *range;
2157         struct iwreq iwr;
2158         int minlen;
2159         size_t buflen;
2160
2161         drv->we_version = 0;
2162
2163         /*
2164          * Use larger buffer than struct iw_range in order to allow the
2165          * structure to grow in the future.
2166          */
2167         buflen = sizeof(struct iw_range) + 500;
2168         range = os_zalloc(buflen);
2169         if (range == NULL)
2170                 return -1;
2171
2172         memset(&iwr, 0, sizeof(iwr));
2173         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2174         iwr.u.data.pointer = (caddr_t) range;
2175         iwr.u.data.length = buflen;
2176
2177         minlen = ((char *) &range->enc_capa) - (char *) range +
2178                 sizeof(range->enc_capa);
2179
2180         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2181                 perror("ioctl[SIOCGIWRANGE]");
2182                 free(range);
2183                 return -1;
2184         } else if (iwr.u.data.length >= minlen &&
2185                    range->we_version_compiled >= 18) {
2186                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2187                            "WE(source)=%d enc_capa=0x%x",
2188                            range->we_version_compiled,
2189                            range->we_version_source,
2190                            range->enc_capa);
2191                 drv->we_version = range->we_version_compiled;
2192         }
2193
2194         free(range);
2195         return 0;
2196 }
2197
2198
2199 static int i802_wireless_event_init(void *priv)
2200 {
2201         struct i802_driver_data *drv = priv;
2202         int s;
2203         struct sockaddr_nl local;
2204
2205         hostap_get_we_version(drv);
2206
2207         drv->wext_sock = -1;
2208
2209         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2210         if (s < 0) {
2211                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2212                 return -1;
2213         }
2214
2215         memset(&local, 0, sizeof(local));
2216         local.nl_family = AF_NETLINK;
2217         local.nl_groups = RTMGRP_LINK;
2218         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2219                 perror("bind(netlink)");
2220                 close(s);
2221                 return -1;
2222         }
2223
2224         eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
2225                                  NULL);
2226         drv->wext_sock = s;
2227
2228         return 0;
2229 }
2230
2231
2232 static void i802_wireless_event_deinit(void *priv)
2233 {
2234         struct i802_driver_data *drv = priv;
2235         if (drv->wext_sock < 0)
2236                 return;
2237         eloop_unregister_read_sock(drv->wext_sock);
2238         close(drv->wext_sock);
2239 }
2240
2241
2242 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
2243 {
2244         struct i802_driver_data *drv = priv;
2245         struct ieee80211_mgmt mgmt;
2246
2247         memset(&mgmt, 0, sizeof(mgmt));
2248         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2249                                           WLAN_FC_STYPE_DEAUTH);
2250         memcpy(mgmt.da, addr, ETH_ALEN);
2251         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2252         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2253         mgmt.u.deauth.reason_code = host_to_le16(reason);
2254         return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2255                                       sizeof(mgmt.u.deauth), 0);
2256 }
2257
2258
2259 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
2260 {
2261         struct i802_driver_data *drv = priv;
2262         struct ieee80211_mgmt mgmt;
2263
2264         memset(&mgmt, 0, sizeof(mgmt));
2265         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2266                                           WLAN_FC_STYPE_DISASSOC);
2267         memcpy(mgmt.da, addr, ETH_ALEN);
2268         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2269         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2270         mgmt.u.disassoc.reason_code = host_to_le16(reason);
2271         return  i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2272                                        sizeof(mgmt.u.disassoc), 0);
2273 }
2274
2275
2276 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
2277 {
2278         struct i802_driver_data *drv;
2279
2280         drv = os_zalloc(sizeof(struct i802_driver_data));
2281         if (drv == NULL) {
2282                 printf("Could not allocate memory for i802 driver data\n");
2283                 return NULL;
2284         }
2285
2286         drv->hapd = hapd;
2287         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
2288
2289         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
2290         drv->if_indices = drv->default_if_indices;
2291         drv->bridge = if_nametoindex(hapd->conf->bridge);
2292
2293         if (i802_init_sockets(drv, bssid))
2294                 goto failed;
2295
2296         return drv;
2297
2298 failed:
2299         free(drv);
2300         return NULL;
2301 }
2302
2303
2304 static void *i802_init(struct hostapd_data *hapd)
2305 {
2306         return i802_init_bssid(hapd, NULL);
2307 }
2308
2309
2310 static void i802_deinit(void *priv)
2311 {
2312         struct i802_driver_data *drv = priv;
2313
2314         i802_del_beacon(drv);
2315
2316         /* remove monitor interface */
2317         nl80211_remove_iface(drv, drv->monitor_ifidx);
2318
2319         (void) hostapd_set_iface_flags(drv, drv->iface, 0);
2320
2321         if (drv->monitor_sock >= 0) {
2322                 eloop_unregister_read_sock(drv->monitor_sock);
2323                 close(drv->monitor_sock);
2324         }
2325         if (drv->ioctl_sock >= 0)
2326                 close(drv->ioctl_sock);
2327         if (drv->eapol_sock >= 0) {
2328                 eloop_unregister_read_sock(drv->eapol_sock);
2329                 close(drv->eapol_sock);
2330         }
2331
2332         genl_family_put(drv->nl80211);
2333         nl_cache_free(drv->nl_cache);
2334         nl_handle_destroy(drv->nl_handle);
2335         nl_cb_put(drv->nl_cb);
2336
2337         if (drv->if_indices != drv->default_if_indices)
2338                 free(drv->if_indices);
2339
2340         free(drv);
2341 }
2342
2343
2344 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2345         .name = "nl80211",
2346         .init = i802_init,
2347         .init_bssid = i802_init_bssid,
2348         .deinit = i802_deinit,
2349         .wireless_event_init = i802_wireless_event_init,
2350         .wireless_event_deinit = i802_wireless_event_deinit,
2351         .set_ieee8021x = i802_set_ieee8021x,
2352         .set_privacy = i802_set_privacy,
2353         .set_encryption = i802_set_encryption,
2354         .get_seqnum = i802_get_seqnum,
2355         .flush = i802_flush,
2356         .read_sta_data = i802_read_sta_data,
2357         .send_eapol = i802_send_eapol,
2358         .sta_set_flags = i802_sta_set_flags,
2359         .sta_deauth = i802_sta_deauth,
2360         .sta_disassoc = i802_sta_disassoc,
2361         .sta_remove = i802_sta_remove,
2362         .send_mgmt_frame = i802_send_mgmt_frame,
2363         .sta_add2 = i802_sta_add2,
2364         .get_inact_sec = i802_get_inact_sec,
2365         .sta_clear_stats = i802_sta_clear_stats,
2366         .set_freq = i802_set_freq,
2367         .set_rts = i802_set_rts,
2368         .get_rts = i802_get_rts,
2369         .set_frag = i802_set_frag,
2370         .get_frag = i802_get_frag,
2371         .set_retry = i802_set_retry,
2372         .get_retry = i802_get_retry,
2373         .set_rate_sets = i802_set_rate_sets,
2374         .set_regulatory_domain = i802_set_regulatory_domain,
2375         .set_beacon = i802_set_beacon,
2376         .set_internal_bridge = i802_set_internal_bridge,
2377         .set_beacon_int = i802_set_beacon_int,
2378         .set_dtim_period = i802_set_dtim_period,
2379         .set_cts_protect = i802_set_cts_protect,
2380         .set_preamble = i802_set_preamble,
2381         .set_short_slot_time = i802_set_short_slot_time,
2382         .set_tx_queue_params = i802_set_tx_queue_params,
2383         .bss_add = i802_bss_add,
2384         .bss_remove = i802_bss_remove,
2385         .if_add = i802_if_add,
2386         .if_update = i802_if_update,
2387         .if_remove = i802_if_remove,
2388         .get_hw_feature_data = i802_get_hw_feature_data,
2389         .set_sta_vlan = i802_set_sta_vlan,
2390 };