hostapd/driver_nl80211.c

   1 /*
   2  * hostapd / Kernel driver communication via nl80211
   3  * Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
   4  * Copyright (c) 2003-2004, Instant802 Networks, Inc.
   5  * Copyright (c) 2005-2006, Devicescape Software, Inc.
   6  * Copyright (c) 2007, Johannes Berg <johannes@sipsolutions.net>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  *
  12  * Alternatively, this software may be distributed under the terms of BSD
  13  * license.
  14  *
  15  * See README and COPYING for more details.
  16  */
  17
  18 #include "includes.h"
  19
  20 #include <sys/ioctl.h>
  21 #include <netlink/genl/genl.h>
  22 #include <netlink/genl/family.h>
  23 #include <netlink/genl/ctrl.h>
  24 #include <netlink/msg.h>
  25 #include <netlink/attr.h>
  26 #include <linux/nl80211.h>
  27 #include <net/if.h>
  28 #include <linux/if_packet.h>
  29 #include <linux/if_ether.h>   /* The L2 protocols */
  30 #include "wireless_copy.h"
  31 #include <net/if_arp.h>
  32
  33 #include "hostapd.h"
  34 #include "driver.h"
  35 #include "ieee802_1x.h"
  36 #include "eloop.h"
  37 #include "ieee802_11.h"
  38 #include "sta_info.h"
  39 #include "hw_features.h"
  40 #include "mlme.h"
  41 #include "radiotap.h"
  42 #include "radiotap_iter.h"
  43
  44 enum ieee80211_msg_type {
  45         ieee80211_msg_normal = 0,
  46         ieee80211_msg_tx_callback_ack = 1,
  47         ieee80211_msg_tx_callback_fail = 2,
  48 };
  49
  50 struct i802_driver_data {
  51         struct hostapd_data *hapd;
  52
  53         char iface[IFNAMSIZ + 1];
  54         int bridge;
  55         int ioctl_sock; /* socket for ioctl() use */
  56         int wext_sock; /* socket for wireless events */
  57         int eapol_sock; /* socket for EAPOL frames */
  58         int monitor_sock; /* socket for monitor */
  59         int monitor_ifidx;
  60
  61         int default_if_indices[16];
  62         int *if_indices;
  63         int num_if_indices;
  64
  65         int we_version;
  66         struct nl_handle *nl_handle;
  67         struct nl_cache *nl_cache;
  68         struct nl_cb *nl_cb;
  69         struct genl_family *nl80211;
  70         int dtim_period, beacon_int;
  71         unsigned int beacon_set:1;
  72         unsigned int ieee802_1x_active:1;
  73 };
  74
  75
  76 static void add_ifidx(struct i802_driver_data *drv, int ifidx)
  77 {
  78         int i;
  79         int *old;
  80
  81         for (i = 0; i < drv->num_if_indices; i++) {
  82                 if (drv->if_indices[i] == 0) {
  83                         drv->if_indices[i] = ifidx;
  84                         return;
  85                 }
  86         }
  87
  88         if (drv->if_indices != drv->default_if_indices)
  89                 old = drv->if_indices;
  90         else
  91                 old = NULL;
  92
  93         drv->if_indices = realloc(old,
  94                                   sizeof(int) * (drv->num_if_indices + 1));
  95         if (!drv->if_indices) {
  96                 if (!old)
  97                         drv->if_indices = drv->default_if_indices;
  98                 else
  99                         drv->if_indices = old;
 100                 wpa_printf(MSG_ERROR, "Failed to reallocate memory for "
 101                            "interfaces");
 102                 wpa_printf(MSG_ERROR, "Ignoring EAPOL on interface %d", ifidx);
 103                 return;
 104         }
 105         drv->if_indices[drv->num_if_indices] = ifidx;
 106         drv->num_if_indices++;
 107 }
 108
 109
 110 static void del_ifidx(struct i802_driver_data *drv, int ifidx)
 111 {
 112         int i;
 113
 114         for (i = 0; i < drv->num_if_indices; i++) {
 115                 if (drv->if_indices[i] == ifidx) {
 116                         drv->if_indices[i] = 0;
 117                         break;
 118                 }
 119         }
 120 }
 121
 122
 123 static int have_ifidx(struct i802_driver_data *drv, int ifidx)
 124 {
 125         int i;
 126
 127         if (ifidx == drv->bridge)
 128                 return 1;
 129
 130         for (i = 0; i < drv->num_if_indices; i++)
 131                 if (drv->if_indices[i] == ifidx)
 132                         return 1;
 133
 134         return 0;
 135 }
 136
 137
 138 /* helper for netlink get routines */
 139 static int ack_wait_handler(struct nl_msg *msg, void *arg)
 140 {
 141         int *finished = arg;
 142
 143         *finished = 1;
 144         return NL_STOP;
 145 }
 146
 147
 148 static int hostapd_set_iface_flags(struct i802_driver_data *drv,
 149                                    const char *ifname, int dev_up)
 150 {
 151         struct ifreq ifr;
 152
 153         if (drv->ioctl_sock < 0)
 154                 return -1;
 155
 156         memset(&ifr, 0, sizeof(ifr));
 157         os_strlcpy(ifr.ifr_name, ifname, IFNAMSIZ);
 158
 159         if (ioctl(drv->ioctl_sock, SIOCGIFFLAGS, &ifr) != 0) {
 160                 perror("ioctl[SIOCGIFFLAGS]");
 161                 wpa_printf(MSG_DEBUG, "Could not read interface flags (%s)",
 162                            drv->iface);
 163                 return -1;
 164         }
 165
 166         if (dev_up)
 167                 ifr.ifr_flags |= IFF_UP;
 168         else
 169                 ifr.ifr_flags &= ~IFF_UP;
 170
 171         if (ioctl(drv->ioctl_sock, SIOCSIFFLAGS, &ifr) != 0) {
 172                 perror("ioctl[SIOCSIFFLAGS]");
 173                 return -1;
 174         }
 175
 176         return 0;
 177 }
 178
 179
 180 static int nl_set_encr(int ifindex, struct i802_driver_data *drv,
 181                        const char *alg, const u8 *addr, int idx, const u8 *key,
 182                        size_t key_len, int txkey)
 183 {
 184         struct nl_msg *msg;
 185         int ret = -1;
 186         int err = 0;
 187
 188         msg = nlmsg_alloc();
 189         if (!msg)
 190                 goto out;
 191
 192         if (strcmp(alg, "none") == 0) {
 193                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 194                             0, NL80211_CMD_DEL_KEY, 0);
 195         } else {
 196                 genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 197                             0, NL80211_CMD_NEW_KEY, 0);
 198                 NLA_PUT(msg, NL80211_ATTR_KEY_DATA, key_len, key);
 199                 if (strcmp(alg, "WEP") == 0) {
 200                         if (key_len == 5)
 201                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
 202                                             0x000FAC01);
 203                         else
 204                                 NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER,
 205                                             0x000FAC05);
 206                 } else if (strcmp(alg, "TKIP") == 0)
 207                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC02);
 208                 else if (strcmp(alg, "CCMP") == 0)
 209                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC04);
 210                 else if (strcmp(alg, "IGTK") == 0)
 211                         NLA_PUT_U32(msg, NL80211_ATTR_KEY_CIPHER, 0x000FAC06);
 212                 else {
 213                         wpa_printf(MSG_ERROR, "%s: Unsupported encryption "
 214                                    "algorithm '%s'", __func__, alg);
 215                         goto out;
 216                 }
 217         }
 218
 219         if (addr)
 220                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 221         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 222         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
 223
 224         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 225             (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
 226                 if (err != -ENOENT) {
 227                         ret = 0;
 228                         goto out;
 229                 }
 230         }
 231
 232         /*
 233          * If we need to set the default TX key we do that below,
 234          * otherwise we're done here.
 235          */
 236         if (!txkey || addr) {
 237                 ret = 0;
 238                 goto out;
 239         }
 240
 241         nlmsg_free(msg);
 242
 243         msg = nlmsg_alloc();
 244         if (!msg)
 245                 goto out;
 246
 247         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 248                     0, NL80211_CMD_SET_KEY, 0);
 249         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 250         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifindex);
 251 #ifdef NL80211_MFP_PENDING
 252         if (strcmp(alg, "IGTK") == 0)
 253                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT_MGMT);
 254         else
 255                 NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
 256 #else /* NL80211_MFP_PENDING */
 257         NLA_PUT_FLAG(msg, NL80211_ATTR_KEY_DEFAULT);
 258 #endif /* NL80211_MFP_PENDING */
 259
 260         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 261             (err = nl_wait_for_ack(drv->nl_handle)) < 0) {
 262                 if (err != -ENOENT) {
 263                         ret = 0;
 264                         goto out;
 265                 }
 266         }
 267
 268         ret = 0;
 269
 270  out:
 271  nla_put_failure:
 272         nlmsg_free(msg);
 273         return ret;
 274 }
 275
 276
 277 static int i802_set_encryption(const char *iface, void *priv, const char *alg,
 278                                const u8 *addr, int idx, const u8 *key,
 279                                size_t key_len, int txkey)
 280 {
 281         struct i802_driver_data *drv = priv;
 282         int ret;
 283
 284         ret = nl_set_encr(if_nametoindex(iface), drv, alg, addr, idx, key,
 285                           key_len, txkey);
 286         if (ret < 0)
 287                 return ret;
 288
 289         if (strcmp(alg, "IGTK") == 0) {
 290                 ret = nl_set_encr(drv->monitor_ifidx, drv, alg, addr, idx, key,
 291                                   key_len, txkey);
 292         }
 293
 294         return ret;
 295 }
 296
 297
 298 static inline int min_int(int a, int b)
 299 {
 300         if (a < b)
 301                 return a;
 302         return b;
 303 }
 304
 305
 306 static int get_key_handler(struct nl_msg *msg, void *arg)
 307 {
 308         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 309         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 310
 311         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 312                   genlmsg_attrlen(gnlh, 0), NULL);
 313
 314         /*
 315          * TODO: validate the key index and mac address!
 316          * Otherwise, there's a race condition as soon as
 317          * the kernel starts sending key notifications.
 318          */
 319
 320         if (tb[NL80211_ATTR_KEY_SEQ])
 321                 memcpy(arg, nla_data(tb[NL80211_ATTR_KEY_SEQ]),
 322                        min_int(nla_len(tb[NL80211_ATTR_KEY_SEQ]), 6));
 323         return NL_SKIP;
 324 }
 325
 326
 327 static int i802_get_seqnum(const char *iface, void *priv, const u8 *addr,
 328                            int idx, u8 *seq)
 329 {
 330         struct i802_driver_data *drv = priv;
 331         struct nl_msg *msg;
 332         struct nl_cb *cb = NULL;
 333         int ret = -1;
 334         int err = 0;
 335         int finished = 0;
 336
 337         msg = nlmsg_alloc();
 338         if (!msg)
 339                 goto out;
 340
 341         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 342                     0, NL80211_CMD_GET_KEY, 0);
 343
 344         if (addr)
 345                 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 346         NLA_PUT_U8(msg, NL80211_ATTR_KEY_IDX, idx);
 347         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
 348
 349         cb = nl_cb_clone(drv->nl_cb);
 350         if (!cb)
 351                 goto out;
 352
 353         memset(seq, 0, 6);
 354
 355         if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
 356                 goto out;
 357
 358         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, get_key_handler, seq);
 359         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
 360
 361         err = nl_recvmsgs(drv->nl_handle, cb);
 362
 363         if (!finished)
 364                 err = nl_wait_for_ack(drv->nl_handle);
 365
 366         if (err < 0)
 367                 goto out;
 368
 369         ret = 0;
 370
 371  out:
 372         nl_cb_put(cb);
 373  nla_put_failure:
 374         nlmsg_free(msg);
 375         return ret;
 376 }
 377
 378
 379 static int i802_set_rate_sets(void *priv, int *supp_rates, int *basic_rates,
 380                               int mode)
 381 {
 382         return -1;
 383 }
 384
 385
 386 static int i802_set_ssid(const char *ifname, void *priv, const u8 *buf,
 387                          int len)
 388 {
 389         struct i802_driver_data *drv = priv;
 390         struct iwreq iwr;
 391
 392         memset(&iwr, 0, sizeof(iwr));
 393         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
 394         iwr.u.essid.flags = 1; /* SSID active */
 395         iwr.u.essid.pointer = (caddr_t) buf;
 396         iwr.u.essid.length = len;
 397
 398         if (ioctl(drv->ioctl_sock, SIOCSIWESSID, &iwr) < 0) {
 399                 perror("ioctl[SIOCSIWESSID]");
 400                 printf("len=%d\n", len);
 401                 return -1;
 402         }
 403
 404         return 0;
 405 }
 406
 407
 408 static int i802_send_mgmt_frame(void *priv, const void *data, size_t len,
 409                                 int flags)
 410 {
 411         struct ieee80211_hdr *hdr = (void*) data;
 412         __u8 rtap_hdr[] = {
 413                 0x00, 0x00, /* radiotap version */
 414                 0x0e, 0x00, /* radiotap length */
 415                 0x02, 0xc0, 0x00, 0x00, /* bmap: flags, tx and rx flags */
 416                 0x0c,       /* F_WEP | F_FRAG (encrypt/fragment if required) */
 417                 0x00,       /* padding */
 418                 0x00, 0x00, /* RX and TX flags to indicate that */
 419                 0x00, 0x00, /* this is the injected frame directly */
 420         };
 421         struct i802_driver_data *drv = priv;
 422         struct iovec iov[2] = {
 423                 {
 424                         .iov_base = &rtap_hdr,
 425                         .iov_len = sizeof(rtap_hdr),
 426                 },
 427                 {
 428                         .iov_base = (void*)data,
 429                         .iov_len = len,
 430                 }
 431         };
 432         struct msghdr msg = {
 433                 .msg_name = NULL,
 434                 .msg_namelen = 0,
 435                 .msg_iov = iov,
 436                 .msg_iovlen = 2,
 437                 .msg_control = NULL,
 438                 .msg_controllen = 0,
 439                 .msg_flags = 0,
 440         };
 441
 442         /*
 443          * ugh, guess what, the generic code sets one of the version
 444          * bits to request tx callback
 445          */
 446         hdr->frame_control &= ~host_to_le16(BIT(1));
 447         return sendmsg(drv->monitor_sock, &msg, flags);
 448 }
 449
 450
 451 /* Set kernel driver on given frequency (MHz) */
 452 static int i802_set_freq(void *priv, int mode, int freq)
 453 {
 454         struct i802_driver_data *drv = priv;
 455         struct iwreq iwr;
 456
 457         memset(&iwr, 0, sizeof(iwr));
 458         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 459         iwr.u.freq.m = freq;
 460         iwr.u.freq.e = 6;
 461
 462         if (ioctl(drv->ioctl_sock, SIOCSIWFREQ, &iwr) < 0) {
 463                 perror("ioctl[SIOCSIWFREQ]");
 464                 return -1;
 465         }
 466
 467         return 0;
 468 }
 469
 470
 471 static int i802_set_rts(void *priv, int rts)
 472 {
 473         struct i802_driver_data *drv = priv;
 474         struct iwreq iwr;
 475
 476         memset(&iwr, 0, sizeof(iwr));
 477         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 478         iwr.u.rts.value = rts;
 479         iwr.u.rts.fixed = 1;
 480
 481         if (ioctl(drv->ioctl_sock, SIOCSIWRTS, &iwr) < 0) {
 482                 perror("ioctl[SIOCSIWRTS]");
 483                 return -1;
 484         }
 485
 486         return 0;
 487 }
 488
 489
 490 static int i802_get_rts(void *priv, int *rts)
 491 {
 492         struct i802_driver_data *drv = priv;
 493         struct iwreq iwr;
 494
 495         memset(&iwr, 0, sizeof(iwr));
 496         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 497
 498         if (ioctl(drv->ioctl_sock, SIOCGIWRTS, &iwr) < 0) {
 499                 perror("ioctl[SIOCGIWRTS]");
 500                 return -1;
 501         }
 502
 503         *rts = iwr.u.rts.value;
 504
 505         return 0;
 506 }
 507
 508
 509 static int i802_set_frag(void *priv, int frag)
 510 {
 511         struct i802_driver_data *drv = priv;
 512         struct iwreq iwr;
 513
 514         memset(&iwr, 0, sizeof(iwr));
 515         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 516         iwr.u.frag.value = frag;
 517         iwr.u.frag.fixed = 1;
 518
 519         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 520                 perror("ioctl[SIOCSIWFRAG]");
 521                 return -1;
 522         }
 523
 524         return 0;
 525 }
 526
 527
 528 static int i802_get_frag(void *priv, int *frag)
 529 {
 530         struct i802_driver_data *drv = priv;
 531         struct iwreq iwr;
 532
 533         memset(&iwr, 0, sizeof(iwr));
 534         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 535
 536         if (ioctl(drv->ioctl_sock, SIOCGIWFRAG, &iwr) < 0) {
 537                 perror("ioctl[SIOCGIWFRAG]");
 538                 return -1;
 539         }
 540
 541         *frag = iwr.u.frag.value;
 542
 543         return 0;
 544 }
 545
 546
 547 static int i802_set_retry(void *priv, int short_retry, int long_retry)
 548 {
 549         struct i802_driver_data *drv = priv;
 550         struct iwreq iwr;
 551
 552         memset(&iwr, 0, sizeof(iwr));
 553         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 554
 555         iwr.u.retry.value = short_retry;
 556         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 557         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 558                 perror("ioctl[SIOCSIWRETRY(short)]");
 559                 return -1;
 560         }
 561
 562         iwr.u.retry.value = long_retry;
 563         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 564         if (ioctl(drv->ioctl_sock, SIOCSIWFRAG, &iwr) < 0) {
 565                 perror("ioctl[SIOCSIWRETRY(long)]");
 566                 return -1;
 567         }
 568
 569         return 0;
 570 }
 571
 572
 573 static int i802_get_retry(void *priv, int *short_retry, int *long_retry)
 574 {
 575         struct i802_driver_data *drv = priv;
 576         struct iwreq iwr;
 577
 578         memset(&iwr, 0, sizeof(iwr));
 579         os_strlcpy(iwr.ifr_name, drv->hapd->conf->iface, IFNAMSIZ);
 580
 581         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MIN;
 582         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 583                 perror("ioctl[SIOCGIWFRAG(short)]");
 584                 return -1;
 585         }
 586         *short_retry = iwr.u.retry.value;
 587
 588         iwr.u.retry.flags = IW_RETRY_LIMIT | IW_RETRY_MAX;
 589         if (ioctl(drv->ioctl_sock, SIOCGIWRETRY, &iwr) < 0) {
 590                 perror("ioctl[SIOCGIWFRAG(long)]");
 591                 return -1;
 592         }
 593         *long_retry = iwr.u.retry.value;
 594
 595         return 0;
 596 }
 597
 598
 599 static int i802_flush(void *priv)
 600 {
 601         struct i802_driver_data *drv = priv;
 602         struct nl_msg *msg;
 603         int ret = -1;
 604
 605         msg = nlmsg_alloc();
 606         if (!msg)
 607                 goto out;
 608
 609         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 610                     0, NL80211_CMD_DEL_STATION, 0);
 611
 612         /*
 613          * XXX: FIX! this needs to flush all VLANs too
 614          */
 615         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 616                     if_nametoindex(drv->iface));
 617
 618         ret = 0;
 619
 620         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 621             nl_wait_for_ack(drv->nl_handle) < 0) {
 622                 ret = -1;
 623         }
 624
 625  nla_put_failure:
 626         nlmsg_free(msg);
 627
 628  out:
 629         return ret;
 630 }
 631
 632
 633 static int get_sta_handler(struct nl_msg *msg, void *arg)
 634 {
 635         struct nlattr *tb[NL80211_ATTR_MAX + 1];
 636         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
 637         struct hostap_sta_driver_data *data = arg;
 638         struct nlattr *stats[NL80211_STA_INFO_MAX + 1];
 639         static struct nla_policy stats_policy[NL80211_STA_INFO_MAX + 1] = {
 640                 [NL80211_STA_INFO_INACTIVE_TIME] = { .type = NLA_U32 },
 641                 [NL80211_STA_INFO_RX_BYTES] = { .type = NLA_U32 },
 642                 [NL80211_STA_INFO_TX_BYTES] = { .type = NLA_U32 },
 643         };
 644
 645         nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
 646                   genlmsg_attrlen(gnlh, 0), NULL);
 647
 648         /*
 649          * TODO: validate the interface and mac address!
 650          * Otherwise, there's a race condition as soon as
 651          * the kernel starts sending station notifications.
 652          */
 653
 654         if (!tb[NL80211_ATTR_STA_INFO]) {
 655                 wpa_printf(MSG_DEBUG, "sta stats missing!");
 656                 return NL_SKIP;
 657         }
 658         if (nla_parse_nested(stats, NL80211_STA_INFO_MAX,
 659                              tb[NL80211_ATTR_STA_INFO],
 660                              stats_policy)) {
 661                 wpa_printf(MSG_DEBUG, "failed to parse nested attributes!");
 662                 return NL_SKIP;
 663         }
 664
 665         if (stats[NL80211_STA_INFO_INACTIVE_TIME])
 666                 data->inactive_msec =
 667                         nla_get_u32(stats[NL80211_STA_INFO_INACTIVE_TIME]);
 668         if (stats[NL80211_STA_INFO_RX_BYTES])
 669                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_RX_BYTES]);
 670         if (stats[NL80211_STA_INFO_TX_BYTES])
 671                 data->rx_bytes = nla_get_u32(stats[NL80211_STA_INFO_TX_BYTES]);
 672
 673         return NL_SKIP;
 674 }
 675
 676 static int i802_read_sta_data(void *priv, struct hostap_sta_driver_data *data,
 677                               const u8 *addr)
 678 {
 679         struct i802_driver_data *drv = priv;
 680         struct nl_msg *msg;
 681         struct nl_cb *cb = NULL;
 682         int ret = -1;
 683         int err = 0;
 684         int finished = 0;
 685
 686         msg = nlmsg_alloc();
 687         if (!msg)
 688                 goto out;
 689
 690         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 691                     0, NL80211_CMD_GET_STATION, 0);
 692
 693         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 694         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
 695
 696         cb = nl_cb_clone(drv->nl_cb);
 697         if (!cb)
 698                 goto out;
 699
 700         if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
 701                 goto out;
 702
 703         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, get_sta_handler, data);
 704         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
 705
 706         err = nl_recvmsgs(drv->nl_handle, cb);
 707
 708         if (!finished)
 709                 err = nl_wait_for_ack(drv->nl_handle);
 710
 711         if (err < 0)
 712                 goto out;
 713
 714         ret = 0;
 715
 716  out:
 717         nl_cb_put(cb);
 718  nla_put_failure:
 719         nlmsg_free(msg);
 720         return ret;
 721
 722 }
 723
 724
 725 static int i802_send_eapol(void *priv, const u8 *addr, const u8 *data,
 726                            size_t data_len, int encrypt, const u8 *own_addr)
 727 {
 728         struct i802_driver_data *drv = priv;
 729         struct ieee80211_hdr *hdr;
 730         size_t len;
 731         u8 *pos;
 732         int res;
 733 #if 0 /* FIX */
 734         int qos = sta->flags & WLAN_STA_WME;
 735 #else
 736         int qos = 0;
 737 #endif
 738
 739         len = sizeof(*hdr) + (qos ? 2 : 0) + sizeof(rfc1042_header) + 2 +
 740                 data_len;
 741         hdr = os_zalloc(len);
 742         if (hdr == NULL) {
 743                 printf("malloc() failed for i802_send_data(len=%lu)\n",
 744                        (unsigned long) len);
 745                 return -1;
 746         }
 747
 748         hdr->frame_control =
 749                 IEEE80211_FC(WLAN_FC_TYPE_DATA, WLAN_FC_STYPE_DATA);
 750         hdr->frame_control |= host_to_le16(WLAN_FC_FROMDS);
 751         if (encrypt)
 752                 hdr->frame_control |= host_to_le16(WLAN_FC_ISWEP);
 753 #if 0 /* To be enabled if qos determination is added above */
 754         if (qos) {
 755                 hdr->frame_control |=
 756                         host_to_le16(WLAN_FC_STYPE_QOS_DATA << 4);
 757         }
 758 #endif
 759
 760         memcpy(hdr->IEEE80211_DA_FROMDS, addr, ETH_ALEN);
 761         memcpy(hdr->IEEE80211_BSSID_FROMDS, own_addr, ETH_ALEN);
 762         memcpy(hdr->IEEE80211_SA_FROMDS, own_addr, ETH_ALEN);
 763         pos = (u8 *) (hdr + 1);
 764
 765 #if 0 /* To be enabled if qos determination is added above */
 766         if (qos) {
 767                 /* add an empty QoS header if needed */
 768                 pos[0] = 0;
 769                 pos[1] = 0;
 770                 pos += 2;
 771         }
 772 #endif
 773
 774         memcpy(pos, rfc1042_header, sizeof(rfc1042_header));
 775         pos += sizeof(rfc1042_header);
 776         WPA_PUT_BE16(pos, ETH_P_PAE);
 777         pos += 2;
 778         memcpy(pos, data, data_len);
 779
 780         res = i802_send_mgmt_frame(drv, (u8 *) hdr, len, 0);
 781         free(hdr);
 782
 783         if (res < 0) {
 784                 perror("i802_send_eapol: send");
 785                 printf("i802_send_eapol - packet len: %lu - failed\n",
 786                        (unsigned long) len);
 787         }
 788
 789         return res;
 790 }
 791
 792
 793 static int i802_sta_add(const char *ifname, void *priv, const u8 *addr,
 794                         u16 aid, u16 capability, u8 *supp_rates,
 795                         size_t supp_rates_len, int flags, u16 listen_interval)
 796 {
 797         struct i802_driver_data *drv = priv;
 798         struct nl_msg *msg;
 799         int ret = -1;
 800
 801         msg = nlmsg_alloc();
 802         if (!msg)
 803                 goto out;
 804
 805         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 806                     0, NL80211_CMD_NEW_STATION, 0);
 807
 808         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 809                     if_nametoindex(drv->iface));
 810         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 811         NLA_PUT_U16(msg, NL80211_ATTR_STA_AID, aid);
 812         NLA_PUT(msg, NL80211_ATTR_STA_SUPPORTED_RATES, supp_rates_len,
 813                 supp_rates);
 814         NLA_PUT_U16(msg, NL80211_ATTR_STA_LISTEN_INTERVAL, listen_interval);
 815
 816         ret = nl_send_auto_complete(drv->nl_handle, msg);
 817         if (ret < 0)
 818                 goto nla_put_failure;
 819
 820         ret = nl_wait_for_ack(drv->nl_handle);
 821         /* ignore EEXIST, this happens if a STA associates while associated */
 822         if (ret == -EEXIST || ret >= 0)
 823                 ret = 0;
 824
 825  nla_put_failure:
 826         nlmsg_free(msg);
 827
 828  out:
 829         return ret;
 830 }
 831
 832
 833 static int i802_sta_remove(void *priv, const u8 *addr)
 834 {
 835         struct i802_driver_data *drv = priv;
 836         struct nl_msg *msg;
 837         int ret = -1;
 838
 839         msg = nlmsg_alloc();
 840         if (!msg)
 841                 goto out;
 842
 843         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 844                     0, NL80211_CMD_DEL_STATION, 0);
 845
 846         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 847                     if_nametoindex(drv->iface));
 848         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 849
 850         ret = 0;
 851
 852         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 853             nl_wait_for_ack(drv->nl_handle) < 0) {
 854                 ret = -1;
 855         }
 856
 857  nla_put_failure:
 858         nlmsg_free(msg);
 859
 860  out:
 861         return ret;
 862 }
 863
 864
 865 static int i802_sta_set_flags(void *priv, const u8 *addr,
 866                               int total_flags, int flags_or, int flags_and)
 867 {
 868         struct i802_driver_data *drv = priv;
 869         struct nl_msg *msg, *flags = NULL;
 870         int ret = -1;
 871
 872         msg = nlmsg_alloc();
 873         if (!msg)
 874                 goto out;
 875
 876         flags = nlmsg_alloc();
 877         if (!flags)
 878                 goto free_msg;
 879
 880         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 881                     0, NL80211_CMD_SET_STATION, 0);
 882
 883         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 884                     if_nametoindex(drv->iface));
 885         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
 886
 887         if (total_flags & WLAN_STA_AUTHORIZED || !drv->ieee802_1x_active)
 888                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_AUTHORIZED);
 889
 890         if (total_flags & WLAN_STA_WME)
 891                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_WME);
 892
 893         if (total_flags & WLAN_STA_SHORT_PREAMBLE)
 894                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_SHORT_PREAMBLE);
 895
 896 #ifdef NL80211_MFP_PENDING
 897         if (total_flags & WLAN_STA_MFP)
 898                 NLA_PUT_FLAG(flags, NL80211_STA_FLAG_MFP);
 899 #endif /* NL80211_MFP_PENDING */
 900
 901         if (nla_put_nested(msg, NL80211_ATTR_STA_FLAGS, flags))
 902                 goto nla_put_failure;
 903
 904         ret = 0;
 905
 906         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 907             nl_wait_for_ack(drv->nl_handle) < 0) {
 908                 ret = -1;
 909         }
 910
 911  nla_put_failure:
 912         nlmsg_free(flags);
 913
 914  free_msg:
 915         nlmsg_free(msg);
 916
 917  out:
 918         return ret;
 919 }
 920
 921
 922 static int i802_set_channel_flag(void *priv, int mode, int chan, int flag,
 923                                  unsigned char power_level,
 924                                  unsigned char antenna_max)
 925 {
 926         return -1;
 927 }
 928
 929
 930 static int i802_set_regulatory_domain(void *priv, unsigned int rd)
 931 {
 932         return -1;
 933 }
 934
 935
 936 static int i802_set_tx_queue_params(void *priv, int queue, int aifs,
 937                                     int cw_min, int cw_max, int burst_time)
 938 {
 939         return -1;
 940 }
 941
 942
 943 static void nl80211_remove_iface(struct i802_driver_data *drv, int ifidx)
 944 {
 945         struct nl_msg *msg;
 946
 947         /* stop listening for EAPOL on this interface */
 948         del_ifidx(drv, ifidx);
 949
 950         msg = nlmsg_alloc();
 951         if (!msg)
 952                 goto nla_put_failure;
 953
 954         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 955                     0, NL80211_CMD_DEL_INTERFACE, 0);
 956         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, ifidx);
 957         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
 958             nl_wait_for_ack(drv->nl_handle) < 0)
 959         nla_put_failure:
 960                 printf("Failed to remove interface.\n");
 961         nlmsg_free(msg);
 962 }
 963
 964
 965 static int nl80211_create_iface(struct i802_driver_data *drv,
 966                                 const char *ifname,
 967                                 enum nl80211_iftype iftype,
 968                                 const u8 *addr)
 969 {
 970         struct nl_msg *msg, *flags = NULL;
 971         int ifidx;
 972         struct ifreq ifreq;
 973         struct iwreq iwr;
 974
 975         msg = nlmsg_alloc();
 976         if (!msg)
 977                 return -1;
 978
 979         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
 980                     0, NL80211_CMD_NEW_INTERFACE, 0);
 981         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
 982                     if_nametoindex(drv->hapd->conf->iface));
 983         NLA_PUT_STRING(msg, NL80211_ATTR_IFNAME, ifname);
 984         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, iftype);
 985
 986         if (iftype == NL80211_IFTYPE_MONITOR) {
 987                 int err;
 988
 989                 flags = nlmsg_alloc();
 990                 if (!flags)
 991                         goto nla_put_failure;
 992
 993                 NLA_PUT_FLAG(flags, NL80211_MNTR_FLAG_COOK_FRAMES);
 994
 995                 err = nla_put_nested(msg, NL80211_ATTR_MNTR_FLAGS, flags);
 996
 997                 nlmsg_free(flags);
 998
 999                 if (err)
1000                         goto nla_put_failure;
1001         }
1002
1003         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1004             nl_wait_for_ack(drv->nl_handle) < 0) {
1005  nla_put_failure:
1006                 printf("Failed to create interface %s.\n", ifname);
1007                 nlmsg_free(msg);
1008                 return -1;
1009         }
1010
1011         nlmsg_free(msg);
1012
1013         ifidx = if_nametoindex(ifname);
1014
1015         if (ifidx <= 0)
1016                 return -1;
1017
1018         /* start listening for EAPOL on this interface */
1019         add_ifidx(drv, ifidx);
1020
1021         if (addr) {
1022                 switch (iftype) {
1023                 case NL80211_IFTYPE_AP:
1024                         os_strlcpy(ifreq.ifr_name, ifname, IFNAMSIZ);
1025                         memcpy(ifreq.ifr_hwaddr.sa_data, addr, ETH_ALEN);
1026                         ifreq.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1027
1028                         if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifreq)) {
1029                                 nl80211_remove_iface(drv, ifidx);
1030                                 return -1;
1031                         }
1032                         break;
1033                 case NL80211_IFTYPE_WDS:
1034                         memset(&iwr, 0, sizeof(iwr));
1035                         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1036                         iwr.u.addr.sa_family = ARPHRD_ETHER;
1037                         memcpy(iwr.u.addr.sa_data, addr, ETH_ALEN);
1038                         if (ioctl(drv->ioctl_sock, SIOCSIWAP, &iwr))
1039                                 return -1;
1040                         break;
1041                 default:
1042                         /* nothing */
1043                         break;
1044                 }
1045         }
1046
1047         return ifidx;
1048 }
1049
1050
1051 static int i802_bss_add(void *priv, const char *ifname, const u8 *bssid)
1052 {
1053         int ifidx;
1054
1055         /*
1056          * The kernel supports that when the low-level driver does,
1057          * but we currently don't because we need per-BSS data that
1058          * currently we can't handle easily.
1059          */
1060         return -1;
1061
1062         ifidx = nl80211_create_iface(priv, ifname, NL80211_IFTYPE_AP, bssid);
1063         if (ifidx < 0)
1064                 return -1;
1065         if (hostapd_set_iface_flags(priv, ifname, 1)) {
1066                 nl80211_remove_iface(priv, ifidx);
1067                 return -1;
1068         }
1069         return 0;
1070 }
1071
1072
1073 static int i802_bss_remove(void *priv, const char *ifname)
1074 {
1075         nl80211_remove_iface(priv, if_nametoindex(ifname));
1076         return 0;
1077 }
1078
1079
1080 static int i802_set_beacon(const char *iface, void *priv,
1081                            u8 *head, size_t head_len,
1082                            u8 *tail, size_t tail_len)
1083 {
1084         struct i802_driver_data *drv = priv;
1085         struct nl_msg *msg;
1086         u8 cmd = NL80211_CMD_NEW_BEACON;
1087         int ret = -1;
1088
1089         msg = nlmsg_alloc();
1090         if (!msg)
1091                 goto out;
1092
1093         if (drv->beacon_set)
1094                 cmd = NL80211_CMD_SET_BEACON;
1095
1096         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1097                     0, cmd, 0);
1098         NLA_PUT(msg, NL80211_ATTR_BEACON_HEAD, head_len, head);
1099         NLA_PUT(msg, NL80211_ATTR_BEACON_TAIL, tail_len, tail);
1100         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1101         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, drv->beacon_int);
1102
1103         if (!drv->dtim_period)
1104                 drv->dtim_period = 2;
1105         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1106
1107         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1108             nl_wait_for_ack(drv->nl_handle) < 0)
1109                 goto out;
1110
1111         ret = 0;
1112
1113         drv->beacon_set = 1;
1114
1115  out:
1116  nla_put_failure:
1117         nlmsg_free(msg);
1118         return ret;
1119 }
1120
1121
1122 static int i802_del_beacon(struct i802_driver_data *drv)
1123 {
1124         struct nl_msg *msg;
1125         int ret = -1;
1126
1127         msg = nlmsg_alloc();
1128         if (!msg)
1129                 goto out;
1130
1131         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1132                     0, NL80211_CMD_DEL_BEACON, 0);
1133         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1134
1135         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1136             nl_wait_for_ack(drv->nl_handle) < 0)
1137                 goto out;
1138
1139         ret = 0;
1140
1141  out:
1142  nla_put_failure:
1143         nlmsg_free(msg);
1144         return ret;
1145 }
1146
1147
1148 static int i802_set_ieee8021x(const char *ifname, void *priv, int enabled)
1149 {
1150         struct i802_driver_data *drv = priv;
1151
1152         /*
1153          * FIXME: This needs to be per interface (BSS)
1154          */
1155         drv->ieee802_1x_active = enabled;
1156         return 0;
1157 }
1158
1159
1160 static int i802_set_privacy(const char *ifname, void *priv, int enabled)
1161 {
1162         struct i802_driver_data *drv = priv;
1163         struct iwreq iwr;
1164
1165         memset(&iwr, 0, sizeof(iwr));
1166
1167         os_strlcpy(iwr.ifr_name, ifname, IFNAMSIZ);
1168         iwr.u.param.flags = IW_AUTH_PRIVACY_INVOKED;
1169         iwr.u.param.value = enabled;
1170
1171         ioctl(drv->ioctl_sock, SIOCSIWAUTH, &iwr);
1172
1173         /* ignore errors, the kernel/driver might not care */
1174         return 0;
1175 }
1176
1177
1178 static int i802_set_internal_bridge(void *priv, int value)
1179 {
1180         return -1;
1181 }
1182
1183
1184 static int i802_set_beacon_int(void *priv, int value)
1185 {
1186         struct i802_driver_data *drv = priv;
1187         struct nl_msg *msg;
1188         int ret = -1;
1189
1190         drv->beacon_int = value;
1191
1192         if (!drv->beacon_set)
1193                 return 0;
1194
1195         msg = nlmsg_alloc();
1196         if (!msg)
1197                 goto out;
1198
1199         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1200                     0, NL80211_CMD_SET_BEACON, 0);
1201         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1202
1203         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
1204
1205         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1206             nl_wait_for_ack(drv->nl_handle) < 0)
1207                 goto out;
1208
1209         ret = 0;
1210
1211  out:
1212  nla_put_failure:
1213         nlmsg_free(msg);
1214         return ret;
1215 }
1216
1217
1218 static int i802_set_dtim_period(const char *iface, void *priv, int value)
1219 {
1220         struct i802_driver_data *drv = priv;
1221         struct nl_msg *msg;
1222         int ret = -1;
1223
1224         msg = nlmsg_alloc();
1225         if (!msg)
1226                 goto out;
1227
1228         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1229                     0, NL80211_CMD_SET_BEACON, 0);
1230         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1231
1232         drv->dtim_period = value;
1233         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1234
1235         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1236             nl_wait_for_ack(drv->nl_handle) < 0)
1237                 goto out;
1238
1239         ret = 0;
1240
1241  out:
1242  nla_put_failure:
1243         nlmsg_free(msg);
1244         return ret;
1245 }
1246
1247
1248 static int i802_set_bss(void *priv, int cts, int preamble, int slot)
1249 {
1250 #ifdef NL80211_CMD_SET_BSS
1251         struct i802_driver_data *drv = priv;
1252         struct nl_msg *msg;
1253         int ret = -1;
1254
1255         msg = nlmsg_alloc();
1256         if (!msg)
1257                 goto out;
1258
1259         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0, 0,
1260                     NL80211_CMD_SET_BSS, 0);
1261
1262         if (cts >= 0)
1263                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_CTS_PROT, cts);
1264         if (preamble >= 0)
1265                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_PREAMBLE, preamble);
1266         if (slot >= 0)
1267                 NLA_PUT_U8(msg, NL80211_ATTR_BSS_SHORT_SLOT_TIME, slot);
1268
1269         ret = 0;
1270
1271         /* TODO: multi-BSS support */
1272         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1273
1274         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1275             nl_wait_for_ack(drv->nl_handle) < 0) {
1276                 ret = -1;
1277         }
1278
1279 nla_put_failure:
1280         nlmsg_free(msg);
1281
1282 out:
1283         return ret;
1284 #else /* NL80211_CMD_SET_BSS */
1285         return -1;
1286 #endif /* NL80211_CMD_SET_BSS */
1287 }
1288
1289
1290 static int i802_set_cts_protect(void *priv, int value)
1291 {
1292         return i802_set_bss(priv, value, -1, -1);
1293 }
1294
1295
1296 static int i802_set_preamble(void *priv, int value)
1297 {
1298         return i802_set_bss(priv, -1, value, -1);
1299 }
1300
1301
1302 static int i802_set_short_slot_time(void *priv, int value)
1303 {
1304         return i802_set_bss(priv, -1, -1, value);
1305 }
1306
1307
1308 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
1309 {
1310         switch (type) {
1311         case HOSTAPD_IF_VLAN:
1312                 return NL80211_IFTYPE_AP_VLAN;
1313         case HOSTAPD_IF_WDS:
1314                 return NL80211_IFTYPE_WDS;
1315         }
1316         return -1;
1317 }
1318
1319
1320 static int i802_if_add(const char *iface, void *priv,
1321                        enum hostapd_driver_if_type type, char *ifname,
1322                        const u8 *addr)
1323 {
1324         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
1325                 return -1;
1326         return 0;
1327 }
1328
1329
1330 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
1331                           char *ifname, const u8 *addr)
1332 {
1333         /* unused at the moment */
1334         return -1;
1335 }
1336
1337
1338 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
1339                           const char *ifname, const u8 *addr)
1340 {
1341         nl80211_remove_iface(priv, if_nametoindex(ifname));
1342         return 0;
1343 }
1344
1345
1346 struct phy_info_arg {
1347         u16 *num_modes;
1348         struct hostapd_hw_modes *modes;
1349         int error;
1350 };
1351
1352 static int phy_info_handler(struct nl_msg *msg, void *arg)
1353 {
1354         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1355         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1356         struct phy_info_arg *phy_info = arg;
1357
1358         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1359
1360         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1361         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1362                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1363                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1364                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1365                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1366                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1367         };
1368
1369         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1370         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1371                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1372                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1373         };
1374
1375         struct nlattr *nl_band;
1376         struct nlattr *nl_freq;
1377         struct nlattr *nl_rate;
1378         int rem_band, rem_freq, rem_rate;
1379         struct hostapd_hw_modes *mode;
1380         int idx, mode_is_set;
1381
1382         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1383                   genlmsg_attrlen(gnlh, 0), NULL);
1384
1385         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1386                 return NL_SKIP;
1387
1388         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1389                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1390                 if (!mode)
1391                         return NL_SKIP;
1392                 phy_info->modes = mode;
1393
1394                 mode_is_set = 0;
1395
1396                 mode = &phy_info->modes[*(phy_info->num_modes)];
1397                 memset(mode, 0, sizeof(*mode));
1398                 *(phy_info->num_modes) += 1;
1399
1400                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1401                           nla_len(nl_band), NULL);
1402
1403                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1404                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1405                                   nla_len(nl_freq), freq_policy);
1406                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1407                                 continue;
1408                         mode->num_channels++;
1409                 }
1410
1411                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1412                 if (!mode->channels)
1413                         return NL_SKIP;
1414
1415                 idx = 0;
1416
1417                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1418                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1419                                   nla_len(nl_freq), freq_policy);
1420                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1421                                 continue;
1422
1423                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1424                         mode->channels[idx].flag |= HOSTAPD_CHAN_W_SCAN |
1425                                                     HOSTAPD_CHAN_W_ACTIVE_SCAN |
1426                                                     HOSTAPD_CHAN_W_IBSS;
1427
1428                         if (!mode_is_set) {
1429                                 /* crude heuristic */
1430                                 if (mode->channels[idx].freq < 4000)
1431                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1432                                 else
1433                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1434                                 mode_is_set = 1;
1435                         }
1436
1437                         /* crude heuristic */
1438                         if (mode->channels[idx].freq < 4000)
1439                                 if (mode->channels[idx].freq == 2848)
1440                                         mode->channels[idx].chan = 14;
1441                                 else
1442                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1443                         else
1444                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1445
1446                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1447                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_SCAN;
1448                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1449                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_ACTIVE_SCAN;
1450                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1451                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_IBSS;
1452                         idx++;
1453                 }
1454
1455                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1456                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1457                                   nla_len(nl_rate), rate_policy);
1458                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1459                                 continue;
1460                         mode->num_rates++;
1461                 }
1462
1463                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1464                 if (!mode->rates)
1465                         return NL_SKIP;
1466
1467                 idx = 0;
1468
1469                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1470                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1471                                   nla_len(nl_rate), rate_policy);
1472                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1473                                 continue;
1474                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1475
1476                         /* crude heuristic */
1477                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1478                             mode->rates[idx].rate > 200)
1479                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1480
1481                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1482                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1483
1484                         idx++;
1485                 }
1486         }
1487
1488         phy_info->error = 0;
1489
1490         return NL_SKIP;
1491 }
1492
1493 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
1494                                                          u16 *num_modes,
1495                                                          u16 *flags)
1496 {
1497         struct i802_driver_data *drv = priv;
1498         struct nl_msg *msg;
1499         int err = -1;
1500         struct nl_cb *cb = NULL;
1501         int finished = 0;
1502         struct phy_info_arg result = {
1503                 .num_modes = num_modes,
1504                 .modes = NULL,
1505                 .error = 1,
1506         };
1507
1508         *num_modes = 0;
1509         *flags = 0;
1510
1511         msg = nlmsg_alloc();
1512         if (!msg)
1513                 return NULL;
1514
1515         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1516                     0, NL80211_CMD_GET_WIPHY, 0);
1517
1518         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1519
1520         cb = nl_cb_clone(drv->nl_cb);
1521         if (!cb)
1522                 goto out;
1523
1524         if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
1525                 goto out;
1526
1527         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, phy_info_handler, &result);
1528         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
1529
1530         err = nl_recvmsgs(drv->nl_handle, cb);
1531
1532         if (!finished)
1533                 err = nl_wait_for_ack(drv->nl_handle);
1534
1535         if (err < 0 || result.error) {
1536                 hostapd_free_hw_features(result.modes, *num_modes);
1537                 result.modes = NULL;
1538         }
1539
1540  out:
1541         nl_cb_put(cb);
1542  nla_put_failure:
1543         if (err)
1544                 fprintf(stderr, "failed to get information: %d\n", err);
1545         nlmsg_free(msg);
1546         return result.modes;
1547 }
1548
1549
1550 static int i802_set_sta_vlan(void *priv, const u8 *addr,
1551                              const char *ifname, int vlan_id)
1552 {
1553         struct i802_driver_data *drv = priv;
1554         struct nl_msg *msg;
1555         int ret = -1;
1556
1557         msg = nlmsg_alloc();
1558         if (!msg)
1559                 goto out;
1560
1561         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1562                     0, NL80211_CMD_SET_STATION, 0);
1563
1564         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1565                     if_nametoindex(drv->iface));
1566         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1567         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1568                     if_nametoindex(ifname));
1569
1570         ret = 0;
1571
1572         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1573             (errno = nl_wait_for_ack(drv->nl_handle) < 0)) {
1574                 ret = -1;
1575         }
1576
1577  nla_put_failure:
1578         nlmsg_free(msg);
1579
1580  out:
1581         return ret;
1582 }
1583
1584
1585 static void handle_unknown_sta(struct hostapd_data *hapd, u8 *ta)
1586 {
1587         struct sta_info *sta;
1588
1589         sta = ap_get_sta(hapd, ta);
1590         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
1591                 printf("Data/PS-poll frame from not associated STA "
1592                        MACSTR "\n", MAC2STR(ta));
1593                 if (sta && (sta->flags & WLAN_STA_AUTH))
1594                         hostapd_sta_disassoc(
1595                                 hapd, ta,
1596                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1597                 else
1598                         hostapd_sta_deauth(
1599                                 hapd, ta,
1600                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1601         }
1602 }
1603
1604
1605 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
1606                                int ok)
1607 {
1608         struct ieee80211_hdr *hdr;
1609         u16 fc, type, stype;
1610         struct sta_info *sta;
1611
1612         hdr = (struct ieee80211_hdr *) buf;
1613         fc = le_to_host16(hdr->frame_control);
1614
1615         type = WLAN_FC_GET_TYPE(fc);
1616         stype = WLAN_FC_GET_STYPE(fc);
1617
1618         switch (type) {
1619         case WLAN_FC_TYPE_MGMT:
1620                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
1621                            ok ? "ACK" : "fail");
1622                 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
1623                 break;
1624         case WLAN_FC_TYPE_CTRL:
1625                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
1626                            ok ? "ACK" : "fail");
1627                 break;
1628         case WLAN_FC_TYPE_DATA:
1629                 wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
1630                            ok ? "ACK" : "fail");
1631                 sta = ap_get_sta(hapd, hdr->addr1);
1632                 if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
1633                         wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
1634                                    "activity poll", MAC2STR(sta->addr),
1635                                    ok ? "ACKed" : "did not ACK");
1636                         if (ok)
1637                                 sta->flags &= ~WLAN_STA_PENDING_POLL;
1638                 }
1639                 if (sta)
1640                         ieee802_1x_tx_status(hapd, sta, buf, len, ok);
1641                 break;
1642         default:
1643                 printf("unknown TX callback frame type %d\n", type);
1644                 break;
1645         }
1646 }
1647
1648
1649 static void handle_frame(struct hostapd_iface *iface, u8 *buf, size_t len,
1650                          struct hostapd_frame_info *hfi,
1651                          enum ieee80211_msg_type msg_type)
1652 {
1653         struct ieee80211_hdr *hdr;
1654         u16 fc, type, stype;
1655         size_t data_len = len;
1656         struct hostapd_data *hapd = NULL;
1657         int broadcast_bssid = 0;
1658         size_t i;
1659         u8 *bssid;
1660
1661         /*
1662          * PS-Poll frames are 16 bytes. All other frames are
1663          * 24 bytes or longer.
1664          */
1665         if (len < 16)
1666                 return;
1667
1668         hdr = (struct ieee80211_hdr *) buf;
1669         fc = le_to_host16(hdr->frame_control);
1670
1671         type = WLAN_FC_GET_TYPE(fc);
1672         stype = WLAN_FC_GET_STYPE(fc);
1673
1674         switch (type) {
1675         case WLAN_FC_TYPE_DATA:
1676                 if (len < 24)
1677                         return;
1678                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
1679                 case WLAN_FC_TODS:
1680                         bssid = hdr->addr1;
1681                         break;
1682                 default:
1683                         /* discard */
1684                         return;
1685                 }
1686                 break;
1687         case WLAN_FC_TYPE_CTRL:
1688                 /* discard non-ps-poll frames */
1689                 if (stype != WLAN_FC_STYPE_PSPOLL)
1690                         return;
1691                 bssid = hdr->addr1;
1692                 break;
1693         case WLAN_FC_TYPE_MGMT:
1694                 bssid = hdr->addr3;
1695                 break;
1696         default:
1697                 /* discard */
1698                 return;
1699         }
1700
1701         /* find interface frame belongs to */
1702         for (i = 0; i < iface->num_bss; i++) {
1703                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
1704                         hapd = iface->bss[i];
1705                         break;
1706                 }
1707         }
1708
1709         if (hapd == NULL) {
1710                 hapd = iface->bss[0];
1711
1712                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
1713                     bssid[2] != 0xff || bssid[3] != 0xff ||
1714                     bssid[4] != 0xff || bssid[5] != 0xff) {
1715                         /*
1716                          * Unknown BSSID - drop frame if this is not from
1717                          * passive scanning or a beacon (at least ProbeReq
1718                          * frames to other APs may be allowed through RX
1719                          * filtering in the wlan hw/driver)
1720                          */
1721                         if ((type != WLAN_FC_TYPE_MGMT ||
1722                              stype != WLAN_FC_STYPE_BEACON))
1723                                 return;
1724                 } else
1725                         broadcast_bssid = 1;
1726         }
1727
1728         switch (msg_type) {
1729         case ieee80211_msg_normal:
1730                 /* continue processing */
1731                 break;
1732         case ieee80211_msg_tx_callback_ack:
1733                 handle_tx_callback(hapd, buf, data_len, 1);
1734                 return;
1735         case ieee80211_msg_tx_callback_fail:
1736                 handle_tx_callback(hapd, buf, data_len, 0);
1737                 return;
1738         }
1739
1740         switch (type) {
1741         case WLAN_FC_TYPE_MGMT:
1742                 if (stype != WLAN_FC_STYPE_BEACON &&
1743                     stype != WLAN_FC_STYPE_PROBE_REQ)
1744                         wpa_printf(MSG_MSGDUMP, "MGMT");
1745                 if (broadcast_bssid) {
1746                         for (i = 0; i < iface->num_bss; i++)
1747                                 ieee802_11_mgmt(iface->bss[i], buf, data_len,
1748                                                 stype, hfi);
1749                 } else
1750                         ieee802_11_mgmt(hapd, buf, data_len, stype, hfi);
1751                 break;
1752         case WLAN_FC_TYPE_CTRL:
1753                 /* can only get here with PS-Poll frames */
1754                 wpa_printf(MSG_DEBUG, "CTRL");
1755                 handle_unknown_sta(hapd, hdr->addr2);
1756                 break;
1757         case WLAN_FC_TYPE_DATA:
1758                 wpa_printf(MSG_DEBUG, "DATA");
1759                 handle_unknown_sta(hapd, hdr->addr2);
1760                 break;
1761         }
1762 }
1763
1764
1765 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
1766 {
1767         struct i802_driver_data *drv = eloop_ctx;
1768         struct hostapd_data *hapd = drv->hapd;
1769         struct sockaddr_ll lladdr;
1770         unsigned char buf[3000];
1771         int len;
1772         socklen_t fromlen = sizeof(lladdr);
1773
1774         len = recvfrom(sock, buf, sizeof(buf), 0,
1775                        (struct sockaddr *)&lladdr, &fromlen);
1776         if (len < 0) {
1777                 perror("recv");
1778                 return;
1779         }
1780
1781         if (have_ifidx(drv, lladdr.sll_ifindex))
1782                 ieee802_1x_receive(hapd, lladdr.sll_addr, buf, len);
1783 }
1784
1785
1786 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1787 {
1788         struct i802_driver_data *drv = eloop_ctx;
1789         int len;
1790         unsigned char buf[3000];
1791         struct hostapd_data *hapd = drv->hapd;
1792         struct ieee80211_radiotap_iterator iter;
1793         int ret;
1794         struct hostapd_frame_info hfi;
1795         int injected = 0, failed = 0, msg_type, rxflags = 0;
1796
1797         len = recv(sock, buf, sizeof(buf), 0);
1798         if (len < 0) {
1799                 perror("recv");
1800                 return;
1801         }
1802
1803         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
1804                 printf("received invalid radiotap frame\n");
1805                 return;
1806         }
1807
1808         memset(&hfi, 0, sizeof(hfi));
1809
1810         while (1) {
1811                 ret = ieee80211_radiotap_iterator_next(&iter);
1812                 if (ret == -ENOENT)
1813                         break;
1814                 if (ret) {
1815                         printf("received invalid radiotap frame (%d)\n", ret);
1816                         return;
1817                 }
1818                 switch (iter.this_arg_index) {
1819                 case IEEE80211_RADIOTAP_FLAGS:
1820                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1821                                 len -= 4;
1822                         break;
1823                 case IEEE80211_RADIOTAP_RX_FLAGS:
1824                         rxflags = 1;
1825                         break;
1826                 case IEEE80211_RADIOTAP_TX_FLAGS:
1827                         injected = 1;
1828                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
1829                                         IEEE80211_RADIOTAP_F_TX_FAIL;
1830                         break;
1831                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1832                         break;
1833                 case IEEE80211_RADIOTAP_CHANNEL:
1834                         /* TODO convert from freq/flags to channel number
1835                         hfi.channel = XXX;
1836                         hfi.phytype = XXX;
1837                          */
1838                         break;
1839                 case IEEE80211_RADIOTAP_RATE:
1840                         hfi.datarate = *iter.this_arg * 5;
1841                         break;
1842                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1843                         hfi.ssi_signal = *iter.this_arg;
1844                         break;
1845                 }
1846         }
1847
1848         if (rxflags && injected)
1849                 return;
1850
1851         if (!injected)
1852                 msg_type = ieee80211_msg_normal;
1853         else if (failed)
1854                 msg_type = ieee80211_msg_tx_callback_fail;
1855         else
1856                 msg_type = ieee80211_msg_tx_callback_ack;
1857
1858         handle_frame(hapd->iface, buf + iter.max_length,
1859                      len - iter.max_length, &hfi, msg_type);
1860 }
1861
1862
1863 static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
1864 {
1865         char buf[IFNAMSIZ];
1866         struct sockaddr_ll ll;
1867         int optval;
1868         socklen_t optlen;
1869
1870         snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
1871         buf[IFNAMSIZ - 1] = '\0';
1872
1873         drv->monitor_ifidx =
1874                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
1875
1876         if (drv->monitor_ifidx < 0)
1877                 return -1;
1878
1879         if (hostapd_set_iface_flags(drv, buf, 1))
1880                 goto error;
1881
1882         memset(&ll, 0, sizeof(ll));
1883         ll.sll_family = AF_PACKET;
1884         ll.sll_ifindex = drv->monitor_ifidx;
1885         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1886         if (drv->monitor_sock < 0) {
1887                 perror("socket[PF_PACKET,SOCK_RAW]");
1888                 goto error;
1889         }
1890
1891         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1892                  sizeof(ll)) < 0) {
1893                 perror("monitor socket bind");
1894                 goto error;
1895         }
1896
1897         optlen = sizeof(optval);
1898         optval = 20;
1899         if (setsockopt
1900             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1901                 perror("Failed to set socket priority");
1902                 goto error;
1903         }
1904
1905         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1906                                      drv, NULL)) {
1907                 printf("Could not register monitor read socket\n");
1908                 goto error;
1909         }
1910
1911         return 0;
1912  error:
1913         nl80211_remove_iface(drv, drv->monitor_ifidx);
1914         return -1;
1915 }
1916
1917
1918 static int nl80211_set_master_mode(struct i802_driver_data *drv,
1919                                    const char *ifname)
1920 {
1921         struct nl_msg *msg;
1922
1923         msg = nlmsg_alloc();
1924         if (!msg)
1925                 return -1;
1926
1927         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1928                     0, NL80211_CMD_SET_INTERFACE, 0);
1929         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1930                     if_nametoindex(ifname));
1931         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
1932
1933         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1934             nl_wait_for_ack(drv->nl_handle) < 0) {
1935  nla_put_failure:
1936                 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
1937                            "mode.", ifname);
1938                 nlmsg_free(msg);
1939                 return -1;
1940         }
1941
1942         nlmsg_free(msg);
1943
1944         return 0;
1945 }
1946
1947
1948 static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
1949 {
1950         struct ifreq ifr;
1951         struct sockaddr_ll addr;
1952
1953         drv->ioctl_sock = -1;
1954
1955         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1956         if (drv->ioctl_sock < 0) {
1957                 perror("socket[PF_INET,SOCK_DGRAM]");
1958                 return -1;
1959         }
1960
1961         /* start listening for EAPOL on the default AP interface */
1962         add_ifidx(drv, if_nametoindex(drv->iface));
1963
1964         if (hostapd_set_iface_flags(drv, drv->iface, 0))
1965                 return -1;
1966
1967         if (bssid) {
1968                 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
1969                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
1970                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1971
1972                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
1973                         perror("ioctl(SIOCSIFHWADDR)");
1974                         return -1;
1975                 }
1976         }
1977
1978         /*
1979          * initialise generic netlink and nl80211
1980          */
1981         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1982         if (!drv->nl_cb) {
1983                 printf("Failed to allocate netlink callbacks.\n");
1984                 return -1;
1985         }
1986
1987         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1988         if (!drv->nl_handle) {
1989                 printf("Failed to allocate netlink handle.\n");
1990                 return -1;
1991         }
1992
1993         if (genl_connect(drv->nl_handle)) {
1994                 printf("Failed to connect to generic netlink.\n");
1995                 return -1;
1996         }
1997
1998         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1999         if (!drv->nl_cache) {
2000                 printf("Failed to allocate generic netlink cache.\n");
2001                 return -1;
2002         }
2003
2004         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
2005         if (!drv->nl80211) {
2006                 printf("nl80211 not found.\n");
2007                 return -1;
2008         }
2009
2010         /* Initialise a monitor interface */
2011         if (nl80211_create_monitor_interface(drv))
2012                 return -1;
2013
2014         if (nl80211_set_master_mode(drv, drv->iface))
2015                 return -1;
2016
2017         if (hostapd_set_iface_flags(drv, drv->iface, 1))
2018                 return -1;
2019
2020         memset(&addr, 0, sizeof(addr));
2021         addr.sll_family = AF_PACKET;
2022         addr.sll_ifindex = ifr.ifr_ifindex;
2023         wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
2024                    addr.sll_ifindex);
2025
2026         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
2027         if (drv->eapol_sock < 0) {
2028                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
2029                 return -1;
2030         }
2031
2032         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
2033         {
2034                 printf("Could not register read socket for eapol\n");
2035                 return -1;
2036         }
2037
2038         memset(&ifr, 0, sizeof(ifr));
2039         os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
2040         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
2041                 perror("ioctl(SIOCGIFHWADDR)");
2042                 return -1;
2043         }
2044
2045         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
2046                 printf("Invalid HW-addr family 0x%04x\n",
2047                        ifr.ifr_hwaddr.sa_family);
2048                 return -1;
2049         }
2050         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
2051
2052         return 0;
2053 }
2054
2055
2056 static int i802_get_inact_sec(void *priv, const u8 *addr)
2057 {
2058         struct hostap_sta_driver_data data;
2059         int ret;
2060
2061         data.inactive_msec = (unsigned long) -1;
2062         ret = i802_read_sta_data(priv, &data, addr);
2063         if (ret || data.inactive_msec == (unsigned long) -1)
2064                 return -1;
2065         return data.inactive_msec / 1000;
2066 }
2067
2068
2069 static int i802_sta_clear_stats(void *priv, const u8 *addr)
2070 {
2071 #if 0
2072         /* TODO */
2073 #endif
2074         return 0;
2075 }
2076
2077
2078 static void
2079 hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
2080                                        char *custom)
2081 {
2082         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
2083
2084         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
2085                 char *pos;
2086                 u8 addr[ETH_ALEN];
2087                 pos = strstr(custom, "addr=");
2088                 if (pos == NULL) {
2089                         wpa_printf(MSG_DEBUG,
2090                                    "MLME-MICHAELMICFAILURE.indication "
2091                                    "without sender address ignored");
2092                         return;
2093                 }
2094                 pos += 5;
2095                 if (hwaddr_aton(pos, addr) == 0) {
2096                         ieee80211_michael_mic_failure(drv->hapd, addr, 1);
2097                 } else {
2098                         wpa_printf(MSG_DEBUG,
2099                                    "MLME-MICHAELMICFAILURE.indication "
2100                                    "with invalid MAC address");
2101                 }
2102         }
2103 }
2104
2105
2106 static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
2107                                             char *data, int len)
2108 {
2109         struct iw_event iwe_buf, *iwe = &iwe_buf;
2110         char *pos, *end, *custom, *buf;
2111
2112         pos = data;
2113         end = data + len;
2114
2115         while (pos + IW_EV_LCP_LEN <= end) {
2116                 /* Event data may be unaligned, so make a local, aligned copy
2117                  * before processing. */
2118                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2119                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
2120                            iwe->cmd, iwe->len);
2121                 if (iwe->len <= IW_EV_LCP_LEN)
2122                         return;
2123
2124                 custom = pos + IW_EV_POINT_LEN;
2125                 if (drv->we_version > 18 &&
2126                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
2127                      iwe->cmd == IWEVCUSTOM)) {
2128                         /* WE-19 removed the pointer from struct iw_point */
2129                         char *dpos = (char *) &iwe_buf.u.data.length;
2130                         int dlen = dpos - (char *) &iwe_buf;
2131                         memcpy(dpos, pos + IW_EV_LCP_LEN,
2132                                sizeof(struct iw_event) - dlen);
2133                 } else {
2134                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2135                         custom += IW_EV_POINT_OFF;
2136                 }
2137
2138                 switch (iwe->cmd) {
2139                 case IWEVCUSTOM:
2140                         if (custom + iwe->u.data.length > end)
2141                                 return;
2142                         buf = malloc(iwe->u.data.length + 1);
2143                         if (buf == NULL)
2144                                 return;
2145                         memcpy(buf, custom, iwe->u.data.length);
2146                         buf[iwe->u.data.length] = '\0';
2147                         hostapd_wireless_event_wireless_custom(drv, buf);
2148                         free(buf);
2149                         break;
2150                 }
2151
2152                 pos += iwe->len;
2153         }
2154 }
2155
2156
2157 static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
2158                                                struct nlmsghdr *h, int len)
2159 {
2160         struct ifinfomsg *ifi;
2161         int attrlen, nlmsg_len, rta_len;
2162         struct rtattr *attr;
2163
2164         if (len < (int) sizeof(*ifi))
2165                 return;
2166
2167         ifi = NLMSG_DATA(h);
2168
2169         /* TODO: use ifi->ifi_index to filter out wireless events from other
2170          * interfaces */
2171
2172         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2173
2174         attrlen = h->nlmsg_len - nlmsg_len;
2175         if (attrlen < 0)
2176                 return;
2177
2178         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
2179
2180         rta_len = RTA_ALIGN(sizeof(struct rtattr));
2181         while (RTA_OK(attr, attrlen)) {
2182                 if (attr->rta_type == IFLA_WIRELESS) {
2183                         hostapd_wireless_event_wireless(
2184                                 drv, ((char *) attr) + rta_len,
2185                                 attr->rta_len - rta_len);
2186                 }
2187                 attr = RTA_NEXT(attr, attrlen);
2188         }
2189 }
2190
2191
2192 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
2193                                            void *sock_ctx)
2194 {
2195         char buf[256];
2196         int left;
2197         struct sockaddr_nl from;
2198         socklen_t fromlen;
2199         struct nlmsghdr *h;
2200         struct i802_driver_data *drv = eloop_ctx;
2201
2202         fromlen = sizeof(from);
2203         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
2204                         (struct sockaddr *) &from, &fromlen);
2205         if (left < 0) {
2206                 if (errno != EINTR && errno != EAGAIN)
2207                         perror("recvfrom(netlink)");
2208                 return;
2209         }
2210
2211         h = (struct nlmsghdr *) buf;
2212         while (left >= (int) sizeof(*h)) {
2213                 int len, plen;
2214
2215                 len = h->nlmsg_len;
2216                 plen = len - sizeof(*h);
2217                 if (len > left || plen < 0) {
2218                         printf("Malformed netlink message: "
2219                                "len=%d left=%d plen=%d\n",
2220                                len, left, plen);
2221                         break;
2222                 }
2223
2224                 switch (h->nlmsg_type) {
2225                 case RTM_NEWLINK:
2226                         hostapd_wireless_event_rtm_newlink(drv, h, plen);
2227                         break;
2228                 }
2229
2230                 len = NLMSG_ALIGN(len);
2231                 left -= len;
2232                 h = (struct nlmsghdr *) ((char *) h + len);
2233         }
2234
2235         if (left > 0) {
2236                 printf("%d extra bytes in the end of netlink message\n", left);
2237         }
2238 }
2239
2240
2241 static int hostap_get_we_version(struct i802_driver_data *drv)
2242 {
2243         struct iw_range *range;
2244         struct iwreq iwr;
2245         int minlen;
2246         size_t buflen;
2247
2248         drv->we_version = 0;
2249
2250         /*
2251          * Use larger buffer than struct iw_range in order to allow the
2252          * structure to grow in the future.
2253          */
2254         buflen = sizeof(struct iw_range) + 500;
2255         range = os_zalloc(buflen);
2256         if (range == NULL)
2257                 return -1;
2258
2259         memset(&iwr, 0, sizeof(iwr));
2260         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2261         iwr.u.data.pointer = (caddr_t) range;
2262         iwr.u.data.length = buflen;
2263
2264         minlen = ((char *) &range->enc_capa) - (char *) range +
2265                 sizeof(range->enc_capa);
2266
2267         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2268                 perror("ioctl[SIOCGIWRANGE]");
2269                 free(range);
2270                 return -1;
2271         } else if (iwr.u.data.length >= minlen &&
2272                    range->we_version_compiled >= 18) {
2273                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2274                            "WE(source)=%d enc_capa=0x%x",
2275                            range->we_version_compiled,
2276                            range->we_version_source,
2277                            range->enc_capa);
2278                 drv->we_version = range->we_version_compiled;
2279         }
2280
2281         free(range);
2282         return 0;
2283 }
2284
2285
2286 static int i802_wireless_event_init(void *priv)
2287 {
2288         struct i802_driver_data *drv = priv;
2289         int s;
2290         struct sockaddr_nl local;
2291
2292         hostap_get_we_version(drv);
2293
2294         drv->wext_sock = -1;
2295
2296         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2297         if (s < 0) {
2298                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2299                 return -1;
2300         }
2301
2302         memset(&local, 0, sizeof(local));
2303         local.nl_family = AF_NETLINK;
2304         local.nl_groups = RTMGRP_LINK;
2305         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2306                 perror("bind(netlink)");
2307                 close(s);
2308                 return -1;
2309         }
2310
2311         eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
2312                                  NULL);
2313         drv->wext_sock = s;
2314
2315         return 0;
2316 }
2317
2318
2319 static void i802_wireless_event_deinit(void *priv)
2320 {
2321         struct i802_driver_data *drv = priv;
2322         if (drv->wext_sock < 0)
2323                 return;
2324         eloop_unregister_read_sock(drv->wext_sock);
2325         close(drv->wext_sock);
2326 }
2327
2328
2329 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
2330 {
2331         struct i802_driver_data *drv = priv;
2332         struct ieee80211_mgmt mgmt;
2333
2334         memset(&mgmt, 0, sizeof(mgmt));
2335         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2336                                           WLAN_FC_STYPE_DEAUTH);
2337         memcpy(mgmt.da, addr, ETH_ALEN);
2338         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2339         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2340         mgmt.u.deauth.reason_code = host_to_le16(reason);
2341         return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2342                                       sizeof(mgmt.u.deauth), 0);
2343 }
2344
2345
2346 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
2347 {
2348         struct i802_driver_data *drv = priv;
2349         struct ieee80211_mgmt mgmt;
2350
2351         memset(&mgmt, 0, sizeof(mgmt));
2352         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2353                                           WLAN_FC_STYPE_DISASSOC);
2354         memcpy(mgmt.da, addr, ETH_ALEN);
2355         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2356         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2357         mgmt.u.disassoc.reason_code = host_to_le16(reason);
2358         return  i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2359                                        sizeof(mgmt.u.disassoc), 0);
2360 }
2361
2362
2363 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
2364 {
2365         struct i802_driver_data *drv;
2366
2367         drv = os_zalloc(sizeof(struct i802_driver_data));
2368         if (drv == NULL) {
2369                 printf("Could not allocate memory for i802 driver data\n");
2370                 return NULL;
2371         }
2372
2373         drv->hapd = hapd;
2374         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
2375
2376         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
2377         drv->if_indices = drv->default_if_indices;
2378         drv->bridge = if_nametoindex(hapd->conf->bridge);
2379
2380         if (i802_init_sockets(drv, bssid))
2381                 goto failed;
2382
2383         return drv;
2384
2385 failed:
2386         free(drv);
2387         return NULL;
2388 }
2389
2390
2391 static void *i802_init(struct hostapd_data *hapd)
2392 {
2393         return i802_init_bssid(hapd, NULL);
2394 }
2395
2396
2397 static void i802_deinit(void *priv)
2398 {
2399         struct i802_driver_data *drv = priv;
2400
2401         i802_del_beacon(drv);
2402
2403         /* remove monitor interface */
2404         nl80211_remove_iface(drv, drv->monitor_ifidx);
2405
2406         (void) hostapd_set_iface_flags(drv, drv->iface, 0);
2407
2408         if (drv->monitor_sock >= 0) {
2409                 eloop_unregister_read_sock(drv->monitor_sock);
2410                 close(drv->monitor_sock);
2411         }
2412         if (drv->ioctl_sock >= 0)
2413                 close(drv->ioctl_sock);
2414         if (drv->eapol_sock >= 0) {
2415                 eloop_unregister_read_sock(drv->eapol_sock);
2416                 close(drv->eapol_sock);
2417         }
2418
2419         genl_family_put(drv->nl80211);
2420         nl_cache_free(drv->nl_cache);
2421         nl_handle_destroy(drv->nl_handle);
2422         nl_cb_put(drv->nl_cb);
2423
2424         if (drv->if_indices != drv->default_if_indices)
2425                 free(drv->if_indices);
2426
2427         free(drv);
2428 }
2429
2430
2431 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2432         .name = "nl80211",
2433         .init = i802_init,
2434         .init_bssid = i802_init_bssid,
2435         .deinit = i802_deinit,
2436         .wireless_event_init = i802_wireless_event_init,
2437         .wireless_event_deinit = i802_wireless_event_deinit,
2438         .set_ieee8021x = i802_set_ieee8021x,
2439         .set_privacy = i802_set_privacy,
2440         .set_encryption = i802_set_encryption,
2441         .get_seqnum = i802_get_seqnum,
2442         .flush = i802_flush,
2443         .read_sta_data = i802_read_sta_data,
2444         .send_eapol = i802_send_eapol,
2445         .sta_set_flags = i802_sta_set_flags,
2446         .sta_deauth = i802_sta_deauth,
2447         .sta_disassoc = i802_sta_disassoc,
2448         .sta_remove = i802_sta_remove,
2449         .set_ssid = i802_set_ssid,
2450         .send_mgmt_frame = i802_send_mgmt_frame,
2451         .sta_add = i802_sta_add,
2452         .get_inact_sec = i802_get_inact_sec,
2453         .sta_clear_stats = i802_sta_clear_stats,
2454         .set_freq = i802_set_freq,
2455         .set_rts = i802_set_rts,
2456         .get_rts = i802_get_rts,
2457         .set_frag = i802_set_frag,
2458         .get_frag = i802_get_frag,
2459         .set_retry = i802_set_retry,
2460         .get_retry = i802_get_retry,
2461         .set_rate_sets = i802_set_rate_sets,
2462         .set_channel_flag = i802_set_channel_flag,
2463         .set_regulatory_domain = i802_set_regulatory_domain,
2464         .set_beacon = i802_set_beacon,
2465         .set_internal_bridge = i802_set_internal_bridge,
2466         .set_beacon_int = i802_set_beacon_int,
2467         .set_dtim_period = i802_set_dtim_period,
2468         .set_cts_protect = i802_set_cts_protect,
2469         .set_preamble = i802_set_preamble,
2470         .set_short_slot_time = i802_set_short_slot_time,
2471         .set_tx_queue_params = i802_set_tx_queue_params,
2472         .bss_add = i802_bss_add,
2473         .bss_remove = i802_bss_remove,
2474         .if_add = i802_if_add,
2475         .if_update = i802_if_update,
2476         .if_remove = i802_if_remove,
2477         .get_hw_feature_data = i802_get_hw_feature_data,
2478         .set_sta_vlan = i802_set_sta_vlan,
2479 };