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