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_set_ssid(const char *ifname, void *priv, const u8 *buf,
 419                          int len)
 420 {
 421         struct i802_driver_data *drv = priv;
 422         struct iwreq iwr;
 423
 424         memset(&iwr, 0, sizeof(iwr));
 425         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
 426         iwr.u.essid.flags = 1; /* SSID active */
 427         iwr.u.essid.pointer = (caddr_t) buf;
 428         iwr.u.essid.length = len;
 429
 430         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 431                 perror("ioctl[SIOCSIWESSID]");
 432                 printf("len=%d\n", len);
 433                 return -1;
 434         }
 435
 436         return 0;
 437 }
 438
 439
 440 static int i802_send_frame(void *priv, const void *data, size_t len,
 441                            int encrypt, int flags)
 442 {
 443         __u8 rtap_hdr[] = {
 444                 0x00, 0x00, /* radiotap version */
 445                 0x0e, 0x00, /* radiotap length */
 446                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
 447                 IEEE80211_RADIOTAP_F_FRAG, /* F_FRAG (fragment if required) */
 448                 0x00,       /* padding */
 449                 0x00, 0x00, /* RX and TX flags to indicate that */
 450                 0x00, 0x00, /* this is the injected frame directly */
 451         };
 452         struct i802_driver_data *drv = priv;
 453         struct iovec iov[2] = {
 454                 {
 455                         .iov_base = &rtap_hdr,
 456                         .iov_len = sizeof(rtap_hdr),
 457                 },
 458                 {
 459                         .iov_base = (void*)data,
 460                         .iov_len = len,
 461                 }
 462         };
 463         struct msghdr msg = {
 464                 .msg_name = NULL,
 465                 .msg_namelen = 0,
 466                 .msg_iov = iov,
 467                 .msg_iovlen = 2,
 468                 .msg_control = NULL,
 469                 .msg_controllen = 0,
 470                 .msg_flags = 0,
 471         };
 472
 473         if (encrypt)
 474                 rtap_hdr[8] |= IEEE80211_RADIOTAP_F_WEP;
 475
 476         return sendmsg(drv->monitor_sock, &msg, flags);
 477 }
 478
 479 static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
 480                                 int flags)
 481 {
 482         return i802_send_frame(priv, data, len, 1, flags);
 483 }
 484
 485 /* Set kernel driver on given frequency (MHz) */
 486 static int i802_set_freq(void *priv, int mode, int freq)
 487 {
 488         struct i802_driver_data *drv = priv;
 489         struct iwreq iwr;
 490
 491         memset(&iwr, 0, sizeof(iwr));
 492         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 493         iwr.u.freq.m = freq;
 494         iwr.u.freq.e = 6;
 495
 496         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 497                 perror("ioctl[SIOCSIWFREQ]");
 498                 return -1;
 499         }
 500
 501         return 0;
 502 }
 503
 504
 505 static int i802_set_rts(void *priv, int rts)
 506 {
 507         struct i802_driver_data *drv = priv;
 508         struct iwreq iwr;
 509
 510         memset(&iwr, 0, sizeof(iwr));
 511         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 512         iwr.u.rts.value = rts;
 513         iwr.u.rts.fixed = 1;
 514
 515         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
 516                 perror("ioctl[SIOCSIWRTS]");
 517                 return -1;
 518         }
 519
 520         return 0;
 521 }
 522
 523
 524 static int i802_get_rts(void *priv, int *rts)
 525 {
 526         struct i802_driver_data *drv = priv;
 527         struct iwreq iwr;
 528
 529         memset(&iwr, 0, sizeof(iwr));
 530         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 531
 532         if (ioctl(drv->ioctl_sock, SIOCGIWRTS, &iwr) < 0) {
 533                 perror("ioctl[SIOCGIWRTS]");
 534                 return -1;
 535         }
 536
 537         *rts = iwr.u.rts.value;
 538
 539         return 0;
 540 }
 541
 542
 543 static int i802_set_frag(void *priv, int frag)
 544 {
 545         struct i802_driver_data *drv = priv;
 546         struct iwreq iwr;
 547
 548         memset(&iwr, 0, sizeof(iwr));
 549         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 550         iwr.u.frag.value = frag;
 551         iwr.u.frag.fixed = 1;
 552
 553         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 554                 perror("ioctl[SIOCSIWFRAG]");
 555                 return -1;
 556         }
 557
 558         return 0;
 559 }
 560
 561
 562 static int i802_get_frag(void *priv, int *frag)
 563 {
 564         struct i802_driver_data *drv = priv;
 565         struct iwreq iwr;
 566
 567         memset(&iwr, 0, sizeof(iwr));
 568         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 569
 570         if (ioctl(drv->ioctl_sock, SIOCGIWFRAG, &iwr) < 0) {
 571                 perror("ioctl[SIOCGIWFRAG]");
 572                 return -1;
 573         }
 574
 575         *frag = iwr.u.frag.value;
 576
 577         return 0;
 578 }
 579
 580
 581 static int i802_set_retry(void *priv, int short_retry, int long_retry)
 582 {
 583         struct i802_driver_data *drv = priv;
 584         struct iwreq iwr;
 585
 586         memset(&iwr, 0, sizeof(iwr));
 587         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 588
 589         iwr.u.retry.value = short_retry;
 590         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 591         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 592                 perror("ioctl[SIOCSIWRETRY(short)]");
 593                 return -1;
 594         }
 595
 596         iwr.u.retry.value = long_retry;
 597         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 598         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 599                 perror("ioctl[SIOCSIWRETRY(long)]");
 600                 return -1;
 601         }
 602
 603         return 0;
 604 }
 605
 606
 607 static int i802_get_retry(void *priv, int *short_retry, int *long_retry)
 608 {
 609         struct i802_driver_data *drv = priv;
 610         struct iwreq iwr;
 611
 612         memset(&iwr, 0, sizeof(iwr));
 613         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 614
 615         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 616         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 617                 perror("ioctl[SIOCGIWFRAG(short)]");
 618                 return -1;
 619         }
 620         *short_retry = iwr.u.retry.value;
 621
 622         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 623         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 624                 perror("ioctl[SIOCGIWFRAG(long)]");
 625                 return -1;
 626         }
 627         *long_retry = iwr.u.retry.value;
 628
 629         return 0;
 630 }
 631
 632
 633 static int i802_flush(void *priv)
 634 {
 635         struct i802_driver_data *drv = priv;
 636         struct nl_msg *msg;
 637
 638         msg = nlmsg_alloc();
 639         if (!msg)
 640                 return -1;
 641
 642         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 643                     0, NL80211_CMD_DEL_STATION, 0);
 644
 645         /*
 646          * XXX: FIX! this needs to flush all VLANs too
 647          */
 648         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 649                     if_nametoindex(drv->iface));
 650
 651         return send_and_recv_msgs(drv, msg, NULL, NULL);
 652  nla_put_failure:
 653         return -ENOBUFS;
 654 }
 655
 656
 657 static int get_sta_handler(struct nl_msg *msg, void *arg)
 658 {
 659         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 660         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 661         struct hostap_sta_driver_data *data = arg;
 662         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
 663         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 664                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
 665                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
 666                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
 667         };
 668
 669         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 670                   genlmsg_attrlen(gnlh, 0), NULL);
 671
 672         /*
 673          * TODO: validate the interface and mac address!
 674          * Otherwise, there's a race condition as soon as
 675          * the kernel starts sending station notifications.
 676          */
 677
 678         if (!tb[NL80211_ATTR_STA_INFO]) {
 679                 wpa_printf(MSG_DEBUG, "sta stats missing!");
 680                 return NL_SKIP;
 681         }
 682         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
 683                              tb[NL80211_ATTR_STA_INFO],
 684                              stats_policy)) {
 685                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
 686                 return NL_SKIP;
 687         }
 688
 689         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
 690                 data->inactive_msec =
 691                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
 692         if (stats[NL80211_STA_INFO_RX_BYTES])
 693                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
 694         if (stats[NL80211_STA_INFO_TX_BYTES])
 695                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
 696
 697         return NL_SKIP;
 698 }
 699
 700 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
 701                               const u8 *addr)
 702 {
 703         struct i802_driver_data *drv = priv;
 704         struct nl_msg *msg;
 705
 706         msg = nlmsg_alloc();
 707         if (!msg)
 708                 return -ENOMEM;
 709
 710         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 711                     0, NL80211_CMD_GET_STATION, 0);
 712
 713         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 714         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 715
 716         return send_and_recv_msgs(drv, msg, get_sta_handler, data);
 717  nla_put_failure:
 718         return -ENOBUFS;
 719 }
 720
 721
 722 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
 723                            size_t data_len, int encrypt, const u8 *own_addr)
 724 {
 725         struct i802_driver_data *drv = priv;
 726         struct ieee80211_hdr *hdr;
 727         size_t len;
 728         u8 *pos;
 729         int res;
 730 #if 0 /* FIX */
 731         int qos = sta->flags & WLAN_STA_WME;
 732 #else
 733         int qos = 0;
 734 #endif
 735
 736         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
 737                 data_len;
 738         hdr = os_zalloc(len);
 739         if (hdr == NULL) {
 740                 printf("malloc() failed for i802_send_data(len=%lu)\n",
 741                        (unsigned long) len);
 742                 return -1;
 743         }
 744
 745         hdr->frame_control =
 746                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 747         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
 748         if (encrypt)
 749                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
 750 #if 0 /* To be enabled if qos determination is added above */
 751         if (qos) {
 752                 hdr->frame_control |=
 753                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
 754         }
 755 #endif
 756
 757         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
 758         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
 759         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
 760         pos = (u8 *) (hdr + 1);
 761
 762 #if 0 /* To be enabled if qos determination is added above */
 763         if (qos) {
 764                 /* add an empty QoS header if needed */
 765                 pos[0] = 0;
 766                 pos[1] = 0;
 767                 pos += 2;
 768         }
 769 #endif
 770
 771         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
 772         pos += sizeof(rfc1042_header);
 773         WPA_PUT_BE16(pos, ETH_P_PAE);
 774         pos += 2;
 775         memcpy(pos, data, data_len);
 776
 777         res = i802_send_frame(drv, (u8 *) hdr, len, encrypt, 0);
 778         free(hdr);
 779
 780         if (res < 0) {
 781                 perror("i802_send_eapol: send");
 782                 printf("i802_send_eapol - packet len: %lu - failed\n",
 783                        (unsigned long) len);
 784         }
 785
 786         return res;
 787 }
 788
 789
 790 static int i802_sta_add2(const char *ifname, void *priv,
 791                          struct hostapd_sta_add_params *params)
 792 {
 793         struct i802_driver_data *drv = priv;
 794         struct nl_msg *msg;
 795         int ret = -ENOBUFS;
 796
 797         msg = nlmsg_alloc();
 798         if (!msg)
 799                 return -ENOMEM;
 800
 801         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 802                     0, NL80211_CMD_NEW_STATION, 0);
 803
 804         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 805                     if_nametoindex(drv->iface));
 806         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, params->addr);
 807         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, params->aid);
 808         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, params->supp_rates_len,
 809                 params->supp_rates);
 810         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL,
 811                     params->listen_interval);
 812
 813 #ifdef CONFIG_IEEE80211N
 814 #ifdef NL80211_ATTR_HT_CAPABILITY
 815         if (params->ht_capabilities) {
 816                 NLA_PUT(msg, NL80211_ATTR_HT_CAPABILITY,
 817                         params->ht_capabilities->length,
 818                         &params->ht_capabilities->data);
 819         }
 820 #endif /* NL80211_ATTR_HT_CAPABILITY */
 821 #endif /* CONFIG_IEEE80211N */
 822
 823         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 824         if (ret == -EEXIST)
 825                 ret = 0;
 826  nla_put_failure:
 827         return ret;
 828 }
 829
 830
 831 static int i802_sta_remove(void *priv, const u8 *addr)
 832 {
 833         struct i802_driver_data *drv = priv;
 834         struct nl_msg *msg;
 835         int ret;
 836
 837         msg = nlmsg_alloc();
 838         if (!msg)
 839                 return -ENOMEM;
 840
 841         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 842                     0, NL80211_CMD_DEL_STATION, 0);
 843
 844         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 845                     if_nametoindex(drv->iface));
 846         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 847
 848         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 849         if (ret == -ENOENT)
 850                 return 0;
 851         return ret;
 852  nla_put_failure:
 853         return -ENOBUFS;
 854 }
 855
 856
 857 static int i802_sta_set_flags(void *priv, const u8 *addr,
 858                               int total_flags, int flags_or, int flags_and)
 859 {
 860         struct i802_driver_data *drv = priv;
 861         struct nl_msg *msg, *flags = NULL;
 862
 863         msg = nlmsg_alloc();
 864         if (!msg)
 865                 return -ENOMEM;
 866
 867         flags = nlmsg_alloc();
 868         if (!flags) {
 869                 nlmsg_free(msg);
 870                 return -ENOMEM;
 871         }
 872
 873         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 874                     0, NL80211_CMD_SET_STATION, 0);
 875
 876         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 877                     if_nametoindex(drv->iface));
 878         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 879
 880         if (total_flags & WLAN_STA_AUTHORIZED || !drv->ieee802_1x_active)
 881                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
 882
 883         if (total_flags & WLAN_STA_WME)
 884                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
 885
 886         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
 887                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
 888
 889 #ifdef NL80211_MFP_PENDING
 890         if (total_flags & WLAN_STA_MFP)
 891                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
 892 #endif /* NL80211_MFP_PENDING */
 893
 894         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
 895                 goto nla_put_failure;
 896
 897         nlmsg_free(flags);
 898
 899         return send_and_recv_msgs(drv, msg, NULL, NULL);
 900  nla_put_failure:
 901         nlmsg_free(flags);
 902         return -ENOBUFS;
 903 }
 904
 905
 906 static int i802_set_channel_flag(void *priv, int mode, int chan, int flag,
 907                                  unsigned char power_level,
 908                                  unsigned char antenna_max)
 909 {
 910         return -1;
 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         return -1;
 924 }
 925
 926
 927 static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
 928 {
 929         struct nl_msg *msg;
 930
 931         /* stop listening for EAPOL on this interface */
 932         del_ifidx(drv, ifidx);
 933
 934         msg = nlmsg_alloc();
 935         if (!msg)
 936                 goto nla_put_failure;
 937
 938         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 939                     0, NL80211_CMD_DEL_INTERFACE, 0);
 940         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
 941
 942         if (send_and_recv_msgs(drv, msg, NULL, NULL) == 0)
 943                 return;
 944  nla_put_failure:
 945         printf("Failed to remove interface.\n");
 946 }
 947
 948
 949 static int nl80211_create_iface(struct i802_driver_data *drv,
 950                                 const char *ifname,
 951                                 enum nl80211_iftype iftype,
 952                                 const u8 *addr)
 953 {
 954         struct nl_msg *msg, *flags = NULL;
 955         int ifidx;
 956         struct ifreq ifreq;
 957         struct iwreq iwr;
 958         int ret = -ENOBUFS;
 959
 960         msg = nlmsg_alloc();
 961         if (!msg)
 962                 return -1;
 963
 964         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 965                     0, NL80211_CMD_NEW_INTERFACE, 0);
 966         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 967                     if_nametoindex(drv->hapd->conf->iface));
 968         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
 969         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
 970
 971         if (iftype == NL80211_IFTYPE_MONITOR) {
 972                 int err;
 973
 974                 flags = nlmsg_alloc();
 975                 if (!flags)
 976                         goto nla_put_failure;
 977
 978                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
 979
 980                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
 981
 982                 nlmsg_free(flags);
 983
 984                 if (err)
 985                         goto nla_put_failure;
 986         }
 987
 988         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
 989         if (ret) {
 990  nla_put_failure:
 991                 printf("Failed to create interface %s.\n", ifname);
 992                 return ret;
 993         }
 994
 995         ifidx = if_nametoindex(ifname);
 996
 997         if (ifidx <= 0)
 998                 return -1;
 999
1000         /* start listening for EAPOL on this interface */
1001         add_ifidx(drv, ifidx);
1002
1003         if (addr) {
1004                 switch (iftype) {
1005                 case NL80211_IFTYPE_AP:
1006                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
1007                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
1008                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1009
1010                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
1011                                 nl80211_remove_iface(drv, ifidx);
1012                                 return -1;
1013                         }
1014                         break;
1015                 case NL80211_IFTYPE_WDS:
1016                         memset(&iwr, 0, sizeof(iwr));
1017                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1018                         iwr.u.addr.sa_family = ARPHRD_ETHER;
1019                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
1020                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
1021                                 return -1;
1022                         break;
1023                 default:
1024                         /* nothing */
1025                         break;
1026                 }
1027         }
1028
1029         return ifidx;
1030 }
1031
1032
1033 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
1034 {
1035         int ifidx;
1036
1037         /*
1038          * The kernel supports that when the low-level driver does,
1039          * but we currently don't because we need per-BSS data that
1040          * currently we can't handle easily.
1041          */
1042         return -1;
1043
1044         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
1045         if (ifidx < 0)
1046                 return -1;
1047         if (hostapd_set_iface_flags(priv, ifname, 1)) {
1048                 nl80211_remove_iface(priv, ifidx);
1049                 return -1;
1050         }
1051         return 0;
1052 }
1053
1054
1055 static int i802_bss_remove(void *priv, const char *ifname)
1056 {
1057         nl80211_remove_iface(priv, if_nametoindex(ifname));
1058         return 0;
1059 }
1060
1061
1062 static int i802_set_beacon(const char *iface, void *priv,
1063                            u8 *head, size_t head_len,
1064                            u8 *tail, size_t tail_len)
1065 {
1066         struct i802_driver_data *drv = priv;
1067         struct nl_msg *msg;
1068         u8 cmd = NL80211_CMD_NEW_BEACON;
1069         int ret;
1070
1071         msg = nlmsg_alloc();
1072         if (!msg)
1073                 return -ENOMEM;
1074
1075         if (drv->beacon_set)
1076                 cmd = NL80211_CMD_SET_BEACON;
1077
1078         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1079                     0, cmd, 0);
1080         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1081         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1082         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1083         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
1084
1085         if (!drv->dtim_period)
1086                 drv->dtim_period = 2;
1087         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1088
1089         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1090         if (!ret)
1091                 drv->beacon_set = 1;
1092         return ret;
1093  nla_put_failure:
1094         return -ENOBUFS;
1095 }
1096
1097
1098 static int i802_del_beacon(struct i802_driver_data *drv)
1099 {
1100         struct nl_msg *msg;
1101
1102         msg = nlmsg_alloc();
1103         if (!msg)
1104                 return -ENOMEM;
1105
1106         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1107                     0, NL80211_CMD_DEL_BEACON, 0);
1108         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1109
1110         return send_and_recv_msgs(drv, msg, NULL, NULL);
1111  nla_put_failure:
1112         return -ENOBUFS;
1113 }
1114
1115
1116 static int i802_set_ieee8021x(const char *ifname, void *priv, int enabled)
1117 {
1118         struct i802_driver_data *drv = priv;
1119
1120         /*
1121          * FIXME: This needs to be per interface (BSS)
1122          */
1123         drv->ieee802_1x_active = enabled;
1124         return 0;
1125 }
1126
1127
1128 static int i802_set_privacy(const char *ifname, void *priv, int enabled)
1129 {
1130         struct i802_driver_data *drv = priv;
1131         struct iwreq iwr;
1132
1133         memset(&iwr, 0, sizeof(iwr));
1134
1135         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1136         iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
1137         iwr.u.param.value = enabled;
1138
1139         ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
1140
1141         /* ignore errors, the kernel/driver might not care */
1142         return 0;
1143 }
1144
1145
1146 static int i802_set_internal_bridge(void *priv, int value)
1147 {
1148         return -1;
1149 }
1150
1151
1152 static int i802_set_beacon_int(void *priv, int value)
1153 {
1154         struct i802_driver_data *drv = priv;
1155         struct nl_msg *msg;
1156
1157         drv->beacon_int = value;
1158
1159         if (!drv->beacon_set)
1160                 return 0;
1161
1162         msg = nlmsg_alloc();
1163         if (!msg)
1164                 return -ENOMEM;
1165
1166         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1167                     0, NL80211_CMD_SET_BEACON, 0);
1168         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1169
1170         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
1171
1172         return send_and_recv_msgs(drv, msg, NULL, NULL);
1173  nla_put_failure:
1174         return -ENOBUFS;
1175 }
1176
1177
1178 static int i802_set_dtim_period(const char *iface, void *priv, int value)
1179 {
1180         struct i802_driver_data *drv = priv;
1181         struct nl_msg *msg;
1182
1183         msg = nlmsg_alloc();
1184         if (!msg)
1185                 return -ENOMEM;
1186
1187         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1188                     0, NL80211_CMD_SET_BEACON, 0);
1189         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1190
1191         drv->dtim_period = value;
1192         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1193
1194         return send_and_recv_msgs(drv, msg, NULL, NULL);
1195  nla_put_failure:
1196         return -ENOBUFS;
1197 }
1198
1199
1200 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
1201 {
1202 #ifdef NL80211_CMD_SET_BSS
1203         struct i802_driver_data *drv = priv;
1204         struct nl_msg *msg;
1205
1206         msg = nlmsg_alloc();
1207         if (!msg)
1208                 return -ENOMEM;
1209
1210         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1211                     NL80211_CMD_SET_BSS, 0);
1212
1213         if (cts >= 0)
1214                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
1215         if (preamble >= 0)
1216                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
1217         if (slot >= 0)
1218                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
1219
1220         /* TODO: multi-BSS support */
1221         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1222
1223         return send_and_recv_msgs(drv, msg, NULL, NULL);
1224  nla_put_failure:
1225         return -ENOBUFS;
1226 #else /* NL80211_CMD_SET_BSS */
1227         return -1;
1228 #endif /* NL80211_CMD_SET_BSS */
1229 }
1230
1231
1232 static int i802_set_cts_protect(void *priv, int value)
1233 {
1234         return i802_set_bss(priv, value, -1, -1);
1235 }
1236
1237
1238 static int i802_set_preamble(void *priv, int value)
1239 {
1240         return i802_set_bss(priv, -1, value, -1);
1241 }
1242
1243
1244 static int i802_set_short_slot_time(void *priv, int value)
1245 {
1246         return i802_set_bss(priv, -1, -1, value);
1247 }
1248
1249
1250 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
1251 {
1252         switch (type) {
1253         case HOSTAPD_IF_VLAN:
1254                 return NL80211_IFTYPE_AP_VLAN;
1255         case HOSTAPD_IF_WDS:
1256                 return NL80211_IFTYPE_WDS;
1257         }
1258         return -1;
1259 }
1260
1261
1262 static int i802_if_add(const char *iface, void *priv,
1263                        enum hostapd_driver_if_type type, char *ifname,
1264                        const u8 *addr)
1265 {
1266         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
1267                 return -1;
1268         return 0;
1269 }
1270
1271
1272 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
1273                           char *ifname, const u8 *addr)
1274 {
1275         /* unused at the moment */
1276         return -1;
1277 }
1278
1279
1280 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
1281                           const char *ifname, const u8 *addr)
1282 {
1283         nl80211_remove_iface(priv, if_nametoindex(ifname));
1284         return 0;
1285 }
1286
1287
1288 struct phy_info_arg {
1289         u16 *num_modes;
1290         struct hostapd_hw_modes *modes;
1291 };
1292
1293 static int phy_info_handler(struct nl_msg *msg, void *arg)
1294 {
1295         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1296         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1297         struct phy_info_arg *phy_info = arg;
1298
1299         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1300
1301         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1302         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1303                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1304                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1305                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1306                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1307                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1308         };
1309
1310         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1311         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1312                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1313                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1314         };
1315
1316         struct nlattr *nl_band;
1317         struct nlattr *nl_freq;
1318         struct nlattr *nl_rate;
1319         int rem_band, rem_freq, rem_rate;
1320         struct hostapd_hw_modes *mode;
1321         int idx, mode_is_set;
1322
1323         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1324                   genlmsg_attrlen(gnlh, 0), NULL);
1325
1326         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1327                 return NL_SKIP;
1328
1329         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1330                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1331                 if (!mode)
1332                         return NL_SKIP;
1333                 phy_info->modes = mode;
1334
1335                 mode_is_set = 0;
1336
1337                 mode = &phy_info->modes[*(phy_info->num_modes)];
1338                 memset(mode, 0, sizeof(*mode));
1339                 *(phy_info->num_modes) += 1;
1340
1341                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1342                           nla_len(nl_band), NULL);
1343
1344                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1345                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1346                                   nla_len(nl_freq), freq_policy);
1347                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1348                                 continue;
1349                         mode->num_channels++;
1350                 }
1351
1352                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1353                 if (!mode->channels)
1354                         return NL_SKIP;
1355
1356                 idx = 0;
1357
1358                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1359                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1360                                   nla_len(nl_freq), freq_policy);
1361                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1362                                 continue;
1363
1364                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1365                         mode->channels[idx].flag |= HOSTAPD_CHAN_W_SCAN |
1366                                                     HOSTAPD_CHAN_W_ACTIVE_SCAN |
1367                                                     HOSTAPD_CHAN_W_IBSS;
1368
1369                         if (!mode_is_set) {
1370                                 /* crude heuristic */
1371                                 if (mode->channels[idx].freq < 4000)
1372                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1373                                 else
1374                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1375                                 mode_is_set = 1;
1376                         }
1377
1378                         /* crude heuristic */
1379                         if (mode->channels[idx].freq < 4000)
1380                                 if (mode->channels[idx].freq == 2848)
1381                                         mode->channels[idx].chan = 14;
1382                                 else
1383                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1384                         else
1385                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1386
1387                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1388                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_SCAN;
1389                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1390                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_ACTIVE_SCAN;
1391                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1392                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_IBSS;
1393                         idx++;
1394                 }
1395
1396                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1397                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1398                                   nla_len(nl_rate), rate_policy);
1399                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1400                                 continue;
1401                         mode->num_rates++;
1402                 }
1403
1404                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1405                 if (!mode->rates)
1406                         return NL_SKIP;
1407
1408                 idx = 0;
1409
1410                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1411                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1412                                   nla_len(nl_rate), rate_policy);
1413                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1414                                 continue;
1415                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1416
1417                         /* crude heuristic */
1418                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1419                             mode->rates[idx].rate > 200)
1420                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1421
1422                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1423                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1424
1425                         idx++;
1426                 }
1427         }
1428
1429         return NL_SKIP;
1430 }
1431
1432 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
1433                                                          u16 *num_modes,
1434                                                          u16 *flags)
1435 {
1436         struct i802_driver_data *drv = priv;
1437         struct nl_msg *msg;
1438         struct phy_info_arg result = {
1439                 .num_modes = num_modes,
1440                 .modes = NULL,
1441         };
1442
1443         *num_modes = 0;
1444         *flags = 0;
1445
1446         msg = nlmsg_alloc();
1447         if (!msg)
1448                 return NULL;
1449
1450         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1451                     0, NL80211_CMD_GET_WIPHY, 0);
1452
1453         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1454
1455         if (send_and_recv_msgs(drv, msg, phy_info_handler, &result) == 0)
1456                 return result.modes;
1457  nla_put_failure:
1458         return NULL;
1459 }
1460
1461
1462 static int i802_set_sta_vlan(void *priv, const u8 *addr,
1463                              const char *ifname, int vlan_id)
1464 {
1465         struct i802_driver_data *drv = priv;
1466         struct nl_msg *msg;
1467
1468         msg = nlmsg_alloc();
1469         if (!msg)
1470                 return -ENOMEM;
1471
1472         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1473                     0, NL80211_CMD_SET_STATION, 0);
1474
1475         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1476                     if_nametoindex(drv->iface));
1477         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1478         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1479                     if_nametoindex(ifname));
1480
1481         return send_and_recv_msgs(drv, msg, NULL, NULL);
1482  nla_put_failure:
1483         return -ENOBUFS;
1484 }
1485
1486
1487 static void handle_unknown_sta(struct hostapd_data *hapd, u8 *ta)
1488 {
1489         struct sta_info *sta;
1490
1491         sta = ap_get_sta(hapd, ta);
1492         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
1493                 printf("Data/PS-poll frame from not associated STA "
1494                        MACSTR "\n", MAC2STR(ta));
1495                 if (sta && (sta->flags & WLAN_STA_AUTH))
1496                         hostapd_sta_disassoc(
1497                                 hapd, ta,
1498                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1499                 else
1500                         hostapd_sta_deauth(
1501                                 hapd, ta,
1502                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1503         }
1504 }
1505
1506
1507 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
1508                                int ok)
1509 {
1510         struct ieee80211_hdr *hdr;
1511         u16 fc, type, stype;
1512         struct sta_info *sta;
1513
1514         hdr = (struct ieee80211_hdr *) buf;
1515         fc = le_to_host16(hdr->frame_control);
1516
1517         type = WLAN_FC_GET_TYPE(fc);
1518         stype = WLAN_FC_GET_STYPE(fc);
1519
1520         switch (type) {
1521         case WLAN_FC_TYPE_MGMT:
1522                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
1523                            ok ? "ACK" : "fail");
1524                 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
1525                 break;
1526         case WLAN_FC_TYPE_CTRL:
1527                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
1528                            ok ? "ACK" : "fail");
1529                 break;
1530         case WLAN_FC_TYPE_DATA:
1531                 wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
1532                            ok ? "ACK" : "fail");
1533                 sta = ap_get_sta(hapd, hdr->addr1);
1534                 if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
1535                         wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
1536                                    "activity poll", MAC2STR(sta->addr),
1537                                    ok ? "ACKed" : "did not ACK");
1538                         if (ok)
1539                                 sta->flags &= ~WLAN_STA_PENDING_POLL;
1540                 }
1541                 if (sta)
1542                         ieee802_1x_tx_status(hapd, sta, buf, len, ok);
1543                 break;
1544         default:
1545                 printf("unknown TX callback frame type %d\n", type);
1546                 break;
1547         }
1548 }
1549
1550
1551 static void handle_frame(struct hostapd_iface *iface, u8 *buf, size_t len,
1552                          struct hostapd_frame_info *hfi,
1553                          enum ieee80211_msg_type msg_type)
1554 {
1555         struct ieee80211_hdr *hdr;
1556         u16 fc, type, stype;
1557         size_t data_len = len;
1558         struct hostapd_data *hapd = NULL;
1559         int broadcast_bssid = 0;
1560         size_t i;
1561         u8 *bssid;
1562
1563         /*
1564          * PS-Poll frames are 16 bytes. All other frames are
1565          * 24 bytes or longer.
1566          */
1567         if (len < 16)
1568                 return;
1569
1570         hdr = (struct ieee80211_hdr *) buf;
1571         fc = le_to_host16(hdr->frame_control);
1572
1573         type = WLAN_FC_GET_TYPE(fc);
1574         stype = WLAN_FC_GET_STYPE(fc);
1575
1576         switch (type) {
1577         case WLAN_FC_TYPE_DATA:
1578                 if (len < 24)
1579                         return;
1580                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
1581                 case WLAN_FC_TODS:
1582                         bssid = hdr->addr1;
1583                         break;
1584                 default:
1585                         /* discard */
1586                         return;
1587                 }
1588                 break;
1589         case WLAN_FC_TYPE_CTRL:
1590                 /* discard non-ps-poll frames */
1591                 if (stype != WLAN_FC_STYPE_PSPOLL)
1592                         return;
1593                 bssid = hdr->addr1;
1594                 break;
1595         case WLAN_FC_TYPE_MGMT:
1596                 bssid = hdr->addr3;
1597                 break;
1598         default:
1599                 /* discard */
1600                 return;
1601         }
1602
1603         /* find interface frame belongs to */
1604         for (i = 0; i < iface->num_bss; i++) {
1605                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
1606                         hapd = iface->bss[i];
1607                         break;
1608                 }
1609         }
1610
1611         if (hapd == NULL) {
1612                 hapd = iface->bss[0];
1613
1614                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
1615                     bssid[2] != 0xff || bssid[3] != 0xff ||
1616                     bssid[4] != 0xff || bssid[5] != 0xff) {
1617                         /*
1618                          * Unknown BSSID - drop frame if this is not from
1619                          * passive scanning or a beacon (at least ProbeReq
1620                          * frames to other APs may be allowed through RX
1621                          * filtering in the wlan hw/driver)
1622                          */
1623                         if ((type != WLAN_FC_TYPE_MGMT ||
1624                              stype != WLAN_FC_STYPE_BEACON))
1625                                 return;
1626                 } else
1627                         broadcast_bssid = 1;
1628         }
1629
1630         switch (msg_type) {
1631         case ieee80211_msg_normal:
1632                 /* continue processing */
1633                 break;
1634         case ieee80211_msg_tx_callback_ack:
1635                 handle_tx_callback(hapd, buf, data_len, 1);
1636                 return;
1637         case ieee80211_msg_tx_callback_fail:
1638                 handle_tx_callback(hapd, buf, data_len, 0);
1639                 return;
1640         }
1641
1642         switch (type) {
1643         case WLAN_FC_TYPE_MGMT:
1644                 if (stype != WLAN_FC_STYPE_BEACON &&
1645                     stype != WLAN_FC_STYPE_PROBE_REQ)
1646                         wpa_printf(MSG_MSGDUMP, "MGMT");
1647                 if (broadcast_bssid) {
1648                         for (i = 0; i < iface->num_bss; i++)
1649                                 ieee802_11_mgmt(iface->bss[i], buf, data_len,
1650                                                 stype, hfi);
1651                 } else
1652                         ieee802_11_mgmt(hapd, buf, data_len, stype, hfi);
1653                 break;
1654         case WLAN_FC_TYPE_CTRL:
1655                 /* can only get here with PS-Poll frames */
1656                 wpa_printf(MSG_DEBUG, "CTRL");
1657                 handle_unknown_sta(hapd, hdr->addr2);
1658                 break;
1659         case WLAN_FC_TYPE_DATA:
1660                 wpa_printf(MSG_DEBUG, "DATA");
1661                 handle_unknown_sta(hapd, hdr->addr2);
1662                 break;
1663         }
1664 }
1665
1666
1667 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
1668 {
1669         struct i802_driver_data *drv = eloop_ctx;
1670         struct hostapd_data *hapd = drv->hapd;
1671         struct sockaddr_ll lladdr;
1672         unsigned char buf[3000];
1673         int len;
1674         socklen_t fromlen = sizeof(lladdr);
1675
1676         len = recvfrom(sock, buf, sizeof(buf), 0,
1677                        (struct sockaddr *)&lladdr, &fromlen);
1678         if (len < 0) {
1679                 perror("recv");
1680                 return;
1681         }
1682
1683         if (have_ifidx(drv, lladdr.sll_ifindex))
1684                 ieee802_1x_receive(hapd, lladdr.sll_addr, buf, len);
1685 }
1686
1687
1688 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1689 {
1690         struct i802_driver_data *drv = eloop_ctx;
1691         int len;
1692         unsigned char buf[3000];
1693         struct hostapd_data *hapd = drv->hapd;
1694         struct ieee80211_radiotap_iterator iter;
1695         int ret;
1696         struct hostapd_frame_info hfi;
1697         int injected = 0, failed = 0, msg_type, rxflags = 0;
1698
1699         len = recv(sock, buf, sizeof(buf), 0);
1700         if (len < 0) {
1701                 perror("recv");
1702                 return;
1703         }
1704
1705         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
1706                 printf("received invalid radiotap frame\n");
1707                 return;
1708         }
1709
1710         memset(&hfi, 0, sizeof(hfi));
1711
1712         while (1) {
1713                 ret = ieee80211_radiotap_iterator_next(&iter);
1714                 if (ret == -ENOENT)
1715                         break;
1716                 if (ret) {
1717                         printf("received invalid radiotap frame (%d)\n", ret);
1718                         return;
1719                 }
1720                 switch (iter.this_arg_index) {
1721                 case IEEE80211_RADIOTAP_FLAGS:
1722                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1723                                 len -= 4;
1724                         break;
1725                 case IEEE80211_RADIOTAP_RX_FLAGS:
1726                         rxflags = 1;
1727                         break;
1728                 case IEEE80211_RADIOTAP_TX_FLAGS:
1729                         injected = 1;
1730                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
1731                                         IEEE80211_RADIOTAP_F_TX_FAIL;
1732                         break;
1733                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1734                         break;
1735                 case IEEE80211_RADIOTAP_CHANNEL:
1736                         /* TODO convert from freq/flags to channel number
1737                         hfi.channel = XXX;
1738                         hfi.phytype = XXX;
1739                          */
1740                         break;
1741                 case IEEE80211_RADIOTAP_RATE:
1742                         hfi.datarate = *iter.this_arg * 5;
1743                         break;
1744                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1745                         hfi.ssi_signal = *iter.this_arg;
1746                         break;
1747                 }
1748         }
1749
1750         if (rxflags && injected)
1751                 return;
1752
1753         if (!injected)
1754                 msg_type = ieee80211_msg_normal;
1755         else if (failed)
1756                 msg_type = ieee80211_msg_tx_callback_fail;
1757         else
1758                 msg_type = ieee80211_msg_tx_callback_ack;
1759
1760         handle_frame(hapd->iface, buf + iter.max_length,
1761                      len - iter.max_length, &hfi, msg_type);
1762 }
1763
1764
1765 static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
1766 {
1767         char buf[IFNAMSIZ];
1768         struct sockaddr_ll ll;
1769         int optval;
1770         socklen_t optlen;
1771
1772         snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
1773         buf[IFNAMSIZ - 1] = '\0';
1774
1775         drv->monitor_ifidx =
1776                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
1777
1778         if (drv->monitor_ifidx < 0)
1779                 return -1;
1780
1781         if (hostapd_set_iface_flags(drv, buf, 1))
1782                 goto error;
1783
1784         memset(&ll, 0, sizeof(ll));
1785         ll.sll_family = AF_PACKET;
1786         ll.sll_ifindex = drv->monitor_ifidx;
1787         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1788         if (drv->monitor_sock < 0) {
1789                 perror("socket[PF_PACKET,SOCK_RAW]");
1790                 goto error;
1791         }
1792
1793         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1794                  sizeof(ll)) < 0) {
1795                 perror("monitor socket bind");
1796                 goto error;
1797         }
1798
1799         optlen = sizeof(optval);
1800         optval = 20;
1801         if (setsockopt
1802             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1803                 perror("Failed to set socket priority");
1804                 goto error;
1805         }
1806
1807         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1808                                      drv, NULL)) {
1809                 printf("Could not register monitor read socket\n");
1810                 goto error;
1811         }
1812
1813         return 0;
1814  error:
1815         nl80211_remove_iface(drv, drv->monitor_ifidx);
1816         return -1;
1817 }
1818
1819
1820 static int nl80211_set_master_mode(struct i802_driver_data *drv,
1821                                    const char *ifname)
1822 {
1823         struct nl_msg *msg;
1824         int ret = -ENOBUFS;
1825
1826         msg = nlmsg_alloc();
1827         if (!msg)
1828                 return -ENOMEM;
1829
1830         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1831                     0, NL80211_CMD_SET_INTERFACE, 0);
1832         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1833                     if_nametoindex(ifname));
1834         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
1835
1836         ret = send_and_recv_msgs(drv, msg, NULL, NULL);
1837         if (!ret)
1838                 return 0;
1839  nla_put_failure:
1840         wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
1841                    "mode.", ifname);
1842         return ret;
1843 }
1844
1845
1846 static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
1847 {
1848         struct ifreq ifr;
1849         struct sockaddr_ll addr;
1850
1851         drv->ioctl_sock = -1;
1852
1853         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1854         if (drv->ioctl_sock < 0) {
1855                 perror("socket[PF_INET,SOCK_DGRAM]");
1856                 return -1;
1857         }
1858
1859         /* start listening for EAPOL on the default AP interface */
1860         add_ifidx(drv, if_nametoindex(drv->iface));
1861
1862         if (hostapd_set_iface_flags(drv, drv->iface, 0))
1863                 return -1;
1864
1865         if (bssid) {
1866                 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
1867                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
1868                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1869
1870                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
1871                         perror("ioctl(SIOCSIFHWADDR)");
1872                         return -1;
1873                 }
1874         }
1875
1876         /*
1877          * initialise generic netlink and nl80211
1878          */
1879         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1880         if (!drv->nl_cb) {
1881                 printf("Failed to allocate netlink callbacks.\n");
1882                 return -1;
1883         }
1884
1885         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1886         if (!drv->nl_handle) {
1887                 printf("Failed to allocate netlink handle.\n");
1888                 return -1;
1889         }
1890
1891         if (genl_connect(drv->nl_handle)) {
1892                 printf("Failed to connect to generic netlink.\n");
1893                 return -1;
1894         }
1895
1896         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1897         if (!drv->nl_cache) {
1898                 printf("Failed to allocate generic netlink cache.\n");
1899                 return -1;
1900         }
1901
1902         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1903         if (!drv->nl80211) {
1904                 printf("nl80211 not found.\n");
1905                 return -1;
1906         }
1907
1908         /* Initialise a monitor interface */
1909         if (nl80211_create_monitor_interface(drv))
1910                 return -1;
1911
1912         if (nl80211_set_master_mode(drv, drv->iface))
1913                 return -1;
1914
1915         if (hostapd_set_iface_flags(drv, drv->iface, 1))
1916                 return -1;
1917
1918         memset(&addr, 0, sizeof(addr));
1919         addr.sll_family = AF_PACKET;
1920         addr.sll_ifindex = ifr.ifr_ifindex;
1921         wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
1922                    addr.sll_ifindex);
1923
1924         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
1925         if (drv->eapol_sock < 0) {
1926                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
1927                 return -1;
1928         }
1929
1930         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
1931         {
1932                 printf("Could not register read socket for eapol\n");
1933                 return -1;
1934         }
1935
1936         memset(&ifr, 0, sizeof(ifr));
1937         os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
1938         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
1939                 perror("ioctl(SIOCGIFHWADDR)");
1940                 return -1;
1941         }
1942
1943         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
1944                 printf("Invalid HW-addr family 0x%04x\n",
1945                        ifr.ifr_hwaddr.sa_family);
1946                 return -1;
1947         }
1948         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
1949
1950         return 0;
1951 }
1952
1953
1954 static int i802_get_inact_sec(void *priv, const u8 *addr)
1955 {
1956         struct hostap_sta_driver_data data;
1957         int ret;
1958
1959         data.inactive_msec = (unsigned long) -1;
1960         ret = i802_read_sta_data(priv, &data, addr);
1961         if (ret || data.inactive_msec == (unsigned long) -1)
1962                 return -1;
1963         return data.inactive_msec / 1000;
1964 }
1965
1966
1967 static int i802_sta_clear_stats(void *priv, const u8 *addr)
1968 {
1969 #if 0
1970         /* TODO */
1971 #endif
1972         return 0;
1973 }
1974
1975
1976 static void
1977 hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
1978                                        char *custom)
1979 {
1980         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
1981
1982         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
1983                 char *pos;
1984                 u8 addr[ETH_ALEN];
1985                 pos = strstr(custom, "addr=");
1986                 if (pos == NULL) {
1987                         wpa_printf(MSG_DEBUG,
1988                                    "MLME-MICHAELMICFAILURE.indication "
1989                                    "without sender address ignored");
1990                         return;
1991                 }
1992                 pos += 5;
1993                 if (hwaddr_aton(pos, addr) == 0) {
1994                         ieee80211_michael_mic_failure(drv->hapd, addr, 1);
1995                 } else {
1996                         wpa_printf(MSG_DEBUG,
1997                                    "MLME-MICHAELMICFAILURE.indication "
1998                                    "with invalid MAC address");
1999                 }
2000         }
2001 }
2002
2003
2004 static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
2005                                             char *data, int len)
2006 {
2007         struct iw_event iwe_buf, *iwe = &iwe_buf;
2008         char *pos, *end, *custom, *buf;
2009
2010         pos = data;
2011         end = data + len;
2012
2013         while (pos + IW_EV_LCP_LEN <= end) {
2014                 /* Event data may be unaligned, so make a local, aligned copy
2015                  * before processing. */
2016                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2017                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
2018                            iwe->cmd, iwe->len);
2019                 if (iwe->len <= IW_EV_LCP_LEN)
2020                         return;
2021
2022                 custom = pos + IW_EV_POINT_LEN;
2023                 if (drv->we_version > 18 &&
2024                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
2025                      iwe->cmd == IWEVCUSTOM)) {
2026                         /* WE-19 removed the pointer from struct iw_point */
2027                         char *dpos = (char *) &iwe_buf.u.data.length;
2028                         int dlen = dpos - (char *) &iwe_buf;
2029                         memcpy(dpos, pos + IW_EV_LCP_LEN,
2030                                sizeof(struct iw_event) - dlen);
2031                 } else {
2032                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2033                         custom += IW_EV_POINT_OFF;
2034                 }
2035
2036                 switch (iwe->cmd) {
2037                 case IWEVCUSTOM:
2038                         if (custom + iwe->u.data.length > end)
2039                                 return;
2040                         buf = malloc(iwe->u.data.length + 1);
2041                         if (buf == NULL)
2042                                 return;
2043                         memcpy(buf, custom, iwe->u.data.length);
2044                         buf[iwe->u.data.length] = '\0';
2045                         hostapd_wireless_event_wireless_custom(drv, buf);
2046                         free(buf);
2047                         break;
2048                 }
2049
2050                 pos += iwe->len;
2051         }
2052 }
2053
2054
2055 static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
2056                                                struct nlmsghdr *h, int len)
2057 {
2058         struct ifinfomsg *ifi;
2059         int attrlen, nlmsg_len, rta_len;
2060         struct rtattr *attr;
2061
2062         if (len < (int) sizeof(*ifi))
2063                 return;
2064
2065         ifi = NLMSG_DATA(h);
2066
2067         /* TODO: use ifi->ifi_index to filter out wireless events from other
2068          * interfaces */
2069
2070         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2071
2072         attrlen = h->nlmsg_len - nlmsg_len;
2073         if (attrlen < 0)
2074                 return;
2075
2076         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
2077
2078         rta_len = RTA_ALIGN(sizeof(struct rtattr));
2079         while (RTA_OK(attr, attrlen)) {
2080                 if (attr->rta_type == IFLA_WIRELESS) {
2081                         hostapd_wireless_event_wireless(
2082                                 drv, ((char *) attr) + rta_len,
2083                                 attr->rta_len - rta_len);
2084                 }
2085                 attr = RTA_NEXT(attr, attrlen);
2086         }
2087 }
2088
2089
2090 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
2091                                            void *sock_ctx)
2092 {
2093         char buf[256];
2094         int left;
2095         struct sockaddr_nl from;
2096         socklen_t fromlen;
2097         struct nlmsghdr *h;
2098         struct i802_driver_data *drv = eloop_ctx;
2099
2100         fromlen = sizeof(from);
2101         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
2102                         (struct sockaddr *) &from, &fromlen);
2103         if (left < 0) {
2104                 if (errno != EINTR && errno != EAGAIN)
2105                         perror("recvfrom(netlink)");
2106                 return;
2107         }
2108
2109         h = (struct nlmsghdr *) buf;
2110         while (left >= (int) sizeof(*h)) {
2111                 int len, plen;
2112
2113                 len = h->nlmsg_len;
2114                 plen = len - sizeof(*h);
2115                 if (len > left || plen < 0) {
2116                         printf("Malformed netlink message: "
2117                                "len=%d left=%d plen=%d\n",
2118                                len, left, plen);
2119                         break;
2120                 }
2121
2122                 switch (h->nlmsg_type) {
2123                 case RTM_NEWLINK:
2124                         hostapd_wireless_event_rtm_newlink(drv, h, plen);
2125                         break;
2126                 }
2127
2128                 len = NLMSG_ALIGN(len);
2129                 left -= len;
2130                 h = (struct nlmsghdr *) ((char *) h + len);
2131         }
2132
2133         if (left > 0) {
2134                 printf("%d extra bytes in the end of netlink message\n", left);
2135         }
2136 }
2137
2138
2139 static int hostap_get_we_version(struct i802_driver_data *drv)
2140 {
2141         struct iw_range *range;
2142         struct iwreq iwr;
2143         int minlen;
2144         size_t buflen;
2145
2146         drv->we_version = 0;
2147
2148         /*
2149          * Use larger buffer than struct iw_range in order to allow the
2150          * structure to grow in the future.
2151          */
2152         buflen = sizeof(struct iw_range) + 500;
2153         range = os_zalloc(buflen);
2154         if (range == NULL)
2155                 return -1;
2156
2157         memset(&iwr, 0, sizeof(iwr));
2158         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2159         iwr.u.data.pointer = (caddr_t) range;
2160         iwr.u.data.length = buflen;
2161
2162         minlen = ((char *) &range->enc_capa) - (char *) range +
2163                 sizeof(range->enc_capa);
2164
2165         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2166                 perror("ioctl[SIOCGIWRANGE]");
2167                 free(range);
2168                 return -1;
2169         } else if (iwr.u.data.length >= minlen &&
2170                    range->we_version_compiled >= 18) {
2171                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2172                            "WE(source)=%d enc_capa=0x%x",
2173                            range->we_version_compiled,
2174                            range->we_version_source,
2175                            range->enc_capa);
2176                 drv->we_version = range->we_version_compiled;
2177         }
2178
2179         free(range);
2180         return 0;
2181 }
2182
2183
2184 static int i802_wireless_event_init(void *priv)
2185 {
2186         struct i802_driver_data *drv = priv;
2187         int s;
2188         struct sockaddr_nl local;
2189
2190         hostap_get_we_version(drv);
2191
2192         drv->wext_sock = -1;
2193
2194         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2195         if (s < 0) {
2196                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2197                 return -1;
2198         }
2199
2200         memset(&local, 0, sizeof(local));
2201         local.nl_family = AF_NETLINK;
2202         local.nl_groups = RTMGRP_LINK;
2203         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2204                 perror("bind(netlink)");
2205                 close(s);
2206                 return -1;
2207         }
2208
2209         eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
2210                                  NULL);
2211         drv->wext_sock = s;
2212
2213         return 0;
2214 }
2215
2216
2217 static void i802_wireless_event_deinit(void *priv)
2218 {
2219         struct i802_driver_data *drv = priv;
2220         if (drv->wext_sock < 0)
2221                 return;
2222         eloop_unregister_read_sock(drv->wext_sock);
2223         close(drv->wext_sock);
2224 }
2225
2226
2227 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
2228 {
2229         struct i802_driver_data *drv = priv;
2230         struct ieee80211_mgmt mgmt;
2231
2232         memset(&mgmt, 0, sizeof(mgmt));
2233         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2234                                           WLAN_FC_STYPE_DEAUTH);
2235         memcpy(mgmt.da, addr, ETH_ALEN);
2236         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2237         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2238         mgmt.u.deauth.reason_code = host_to_le16(reason);
2239         return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2240                                       sizeof(mgmt.u.deauth), 0);
2241 }
2242
2243
2244 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
2245 {
2246         struct i802_driver_data *drv = priv;
2247         struct ieee80211_mgmt mgmt;
2248
2249         memset(&mgmt, 0, sizeof(mgmt));
2250         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2251                                           WLAN_FC_STYPE_DISASSOC);
2252         memcpy(mgmt.da, addr, ETH_ALEN);
2253         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2254         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2255         mgmt.u.disassoc.reason_code = host_to_le16(reason);
2256         return  i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2257                                        sizeof(mgmt.u.disassoc), 0);
2258 }
2259
2260
2261 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
2262 {
2263         struct i802_driver_data *drv;
2264
2265         drv = os_zalloc(sizeof(struct i802_driver_data));
2266         if (drv == NULL) {
2267                 printf("Could not allocate memory for i802 driver data\n");
2268                 return NULL;
2269         }
2270
2271         drv->hapd = hapd;
2272         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
2273
2274         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
2275         drv->if_indices = drv->default_if_indices;
2276         drv->bridge = if_nametoindex(hapd->conf->bridge);
2277
2278         if (i802_init_sockets(drv, bssid))
2279                 goto failed;
2280
2281         return drv;
2282
2283 failed:
2284         free(drv);
2285         return NULL;
2286 }
2287
2288
2289 static void *i802_init(struct hostapd_data *hapd)
2290 {
2291         return i802_init_bssid(hapd, NULL);
2292 }
2293
2294
2295 static void i802_deinit(void *priv)
2296 {
2297         struct i802_driver_data *drv = priv;
2298
2299         i802_del_beacon(drv);
2300
2301         /* remove monitor interface */
2302         nl80211_remove_iface(drv, drv->monitor_ifidx);
2303
2304         (void) hostapd_set_iface_flags(drv, drv->iface, 0);
2305
2306         if (drv->monitor_sock >= 0) {
2307                 eloop_unregister_read_sock(drv->monitor_sock);
2308                 close(drv->monitor_sock);
2309         }
2310         if (drv->ioctl_sock >= 0)
2311                 close(drv->ioctl_sock);
2312         if (drv->eapol_sock >= 0) {
2313                 eloop_unregister_read_sock(drv->eapol_sock);
2314                 close(drv->eapol_sock);
2315         }
2316
2317         genl_family_put(drv->nl80211);
2318         nl_cache_free(drv->nl_cache);
2319         nl_handle_destroy(drv->nl_handle);
2320         nl_cb_put(drv->nl_cb);
2321
2322         if (drv->if_indices != drv->default_if_indices)
2323                 free(drv->if_indices);
2324
2325         free(drv);
2326 }
2327
2328
2329 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2330         .name = "nl80211",
2331         .init = i802_init,
2332         .init_bssid = i802_init_bssid,
2333         .deinit = i802_deinit,
2334         .wireless_event_init = i802_wireless_event_init,
2335         .wireless_event_deinit = i802_wireless_event_deinit,
2336         .set_ieee8021x = i802_set_ieee8021x,
2337         .set_privacy = i802_set_privacy,
2338         .set_encryption = i802_set_encryption,
2339         .get_seqnum = i802_get_seqnum,
2340         .flush = i802_flush,
2341         .read_sta_data = i802_read_sta_data,
2342         .send_eapol = i802_send_eapol,
2343         .sta_set_flags = i802_sta_set_flags,
2344         .sta_deauth = i802_sta_deauth,
2345         .sta_disassoc = i802_sta_disassoc,
2346         .sta_remove = i802_sta_remove,
2347         .set_ssid = i802_set_ssid,
2348         .send_mgmt_frame = i802_send_mgmt_frame,
2349         .sta_add2 = i802_sta_add2,
2350         .get_inact_sec = i802_get_inact_sec,
2351         .sta_clear_stats = i802_sta_clear_stats,
2352         .set_freq = i802_set_freq,
2353         .set_rts = i802_set_rts,
2354         .get_rts = i802_get_rts,
2355         .set_frag = i802_set_frag,
2356         .get_frag = i802_get_frag,
2357         .set_retry = i802_set_retry,
2358         .get_retry = i802_get_retry,
2359         .set_rate_sets = i802_set_rate_sets,
2360         .set_channel_flag = i802_set_channel_flag,
2361         .set_regulatory_domain = i802_set_regulatory_domain,
2362         .set_beacon = i802_set_beacon,
2363         .set_internal_bridge = i802_set_internal_bridge,
2364         .set_beacon_int = i802_set_beacon_int,
2365         .set_dtim_period = i802_set_dtim_period,
2366         .set_cts_protect = i802_set_cts_protect,
2367         .set_preamble = i802_set_preamble,
2368         .set_short_slot_time = i802_set_short_slot_time,
2369         .set_tx_queue_params = i802_set_tx_queue_params,
2370         .bss_add = i802_bss_add,
2371         .bss_remove = i802_bss_remove,
2372         .if_add = i802_if_add,
2373         .if_update = i802_if_update,
2374         .if_remove = i802_if_remove,
2375         .get_hw_feature_data = i802_get_hw_feature_data,
2376         .set_sta_vlan = i802_set_sta_vlan,
2377 };