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