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                         err = 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                         err = 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         msg = nlmsg_alloc();
1156         if (!msg)
1157                 goto out;
1158
1159         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1160                     0, NL80211_CMD_SET_BEACON, 0);
1161         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1162
1163         NLA_PUT_U32(msg, NL80211_ATTR_BEACON_INTERVAL, value);
1164
1165         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1166             nl_wait_for_ack(drv->nl_handle) < 0)
1167                 goto out;
1168
1169         ret = 0;
1170
1171  out:
1172  nla_put_failure:
1173         nlmsg_free(msg);
1174         return ret;
1175 }
1176
1177
1178 static int i802_set_dtim_period(const char *iface, void *priv, int value)
1179 {
1180         struct i802_driver_data *drv = priv;
1181         struct nl_msg *msg;
1182         int ret = -1;
1183
1184         msg = nlmsg_alloc();
1185         if (!msg)
1186                 goto out;
1187
1188         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1189                     0, NL80211_CMD_SET_BEACON, 0);
1190         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(iface));
1191
1192         drv->dtim_period = value;
1193         NLA_PUT_U32(msg, NL80211_ATTR_DTIM_PERIOD, drv->dtim_period);
1194
1195         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1196             nl_wait_for_ack(drv->nl_handle) < 0)
1197                 goto out;
1198
1199         ret = 0;
1200
1201  out:
1202  nla_put_failure:
1203         nlmsg_free(msg);
1204         return ret;
1205 }
1206
1207
1208 static int i802_set_cts_protect(void *priv, int value)
1209 {
1210         return -1;
1211 }
1212
1213
1214 static int i802_set_preamble(void *priv, int value)
1215 {
1216         return -1;
1217 }
1218
1219
1220 static int i802_set_short_slot_time(void *priv, int value)
1221 {
1222         return -1;
1223 }
1224
1225
1226 static enum nl80211_iftype i802_if_type(enum hostapd_driver_if_type type)
1227 {
1228         switch (type) {
1229         case HOSTAPD_IF_VLAN:
1230                 return NL80211_IFTYPE_AP_VLAN;
1231         case HOSTAPD_IF_WDS:
1232                 return NL80211_IFTYPE_WDS;
1233         }
1234         return -1;
1235 }
1236
1237
1238 static int i802_if_add(const char *iface, void *priv,
1239                        enum hostapd_driver_if_type type, char *ifname,
1240                        const u8 *addr)
1241 {
1242         if (nl80211_create_iface(priv, ifname, i802_if_type(type), addr) < 0)
1243                 return -1;
1244         return 0;
1245 }
1246
1247
1248 static int i802_if_update(void *priv, enum hostapd_driver_if_type type,
1249                           char *ifname, const u8 *addr)
1250 {
1251         /* unused at the moment */
1252         return -1;
1253 }
1254
1255
1256 static int i802_if_remove(void *priv, enum hostapd_driver_if_type type,
1257                           const char *ifname, const u8 *addr)
1258 {
1259         nl80211_remove_iface(priv, if_nametoindex(ifname));
1260         return 0;
1261 }
1262
1263
1264 struct phy_info_arg {
1265         u16 *num_modes;
1266         struct hostapd_hw_modes *modes;
1267         int error;
1268 };
1269
1270 static int phy_info_handler(struct nl_msg *msg, void *arg)
1271 {
1272         struct nlattr *tb_msg[NL80211_ATTR_MAX + 1];
1273         struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
1274         struct phy_info_arg *phy_info = arg;
1275
1276         struct nlattr *tb_band[NL80211_BAND_ATTR_MAX + 1];
1277
1278         struct nlattr *tb_freq[NL80211_FREQUENCY_ATTR_MAX + 1];
1279         static struct nla_policy freq_policy[NL80211_FREQUENCY_ATTR_MAX + 1] = {
1280                 [NL80211_FREQUENCY_ATTR_FREQ] = { .type = NLA_U32 },
1281                 [NL80211_FREQUENCY_ATTR_DISABLED] = { .type = NLA_FLAG },
1282                 [NL80211_FREQUENCY_ATTR_PASSIVE_SCAN] = { .type = NLA_FLAG },
1283                 [NL80211_FREQUENCY_ATTR_NO_IBSS] = { .type = NLA_FLAG },
1284                 [NL80211_FREQUENCY_ATTR_RADAR] = { .type = NLA_FLAG },
1285         };
1286
1287         struct nlattr *tb_rate[NL80211_BITRATE_ATTR_MAX + 1];
1288         static struct nla_policy rate_policy[NL80211_BITRATE_ATTR_MAX + 1] = {
1289                 [NL80211_BITRATE_ATTR_RATE] = { .type = NLA_U32 },
1290                 [NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE] = { .type = NLA_FLAG },
1291         };
1292
1293         struct nlattr *nl_band;
1294         struct nlattr *nl_freq;
1295         struct nlattr *nl_rate;
1296         int rem_band, rem_freq, rem_rate;
1297         struct hostapd_hw_modes *mode;
1298         int idx, mode_is_set;
1299
1300         nla_parse(tb_msg, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
1301                   genlmsg_attrlen(gnlh, 0), NULL);
1302
1303         if (!tb_msg[NL80211_ATTR_WIPHY_BANDS])
1304                 return NL_SKIP;
1305
1306         nla_for_each_nested(nl_band, tb_msg[NL80211_ATTR_WIPHY_BANDS], rem_band) {
1307                 mode = realloc(phy_info->modes, (*phy_info->num_modes + 1) * sizeof(*mode));
1308                 if (!mode)
1309                         return NL_SKIP;
1310                 phy_info->modes = mode;
1311
1312                 mode_is_set = 0;
1313
1314                 mode = &phy_info->modes[*(phy_info->num_modes)];
1315                 memset(mode, 0, sizeof(*mode));
1316                 *(phy_info->num_modes) += 1;
1317
1318                 nla_parse(tb_band, NL80211_BAND_ATTR_MAX, nla_data(nl_band),
1319                           nla_len(nl_band), NULL);
1320
1321                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1322                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1323                                   nla_len(nl_freq), freq_policy);
1324                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1325                                 continue;
1326                         mode->num_channels++;
1327                 }
1328
1329                 mode->channels = calloc(mode->num_channels, sizeof(struct hostapd_channel_data));
1330                 if (!mode->channels)
1331                         return NL_SKIP;
1332
1333                 idx = 0;
1334
1335                 nla_for_each_nested(nl_freq, tb_band[NL80211_BAND_ATTR_FREQS], rem_freq) {
1336                         nla_parse(tb_freq, NL80211_FREQUENCY_ATTR_MAX, nla_data(nl_freq),
1337                                   nla_len(nl_freq), freq_policy);
1338                         if (!tb_freq[NL80211_FREQUENCY_ATTR_FREQ])
1339                                 continue;
1340
1341                         mode->channels[idx].freq = nla_get_u32(tb_freq[NL80211_FREQUENCY_ATTR_FREQ]);
1342                         mode->channels[idx].flag |= HOSTAPD_CHAN_W_SCAN |
1343                                                     HOSTAPD_CHAN_W_ACTIVE_SCAN |
1344                                                     HOSTAPD_CHAN_W_IBSS;
1345
1346                         if (!mode_is_set) {
1347                                 /* crude heuristic */
1348                                 if (mode->channels[idx].freq < 4000)
1349                                         mode->mode = HOSTAPD_MODE_IEEE80211B;
1350                                 else
1351                                         mode->mode = HOSTAPD_MODE_IEEE80211A;
1352                                 mode_is_set = 1;
1353                         }
1354
1355                         /* crude heuristic */
1356                         if (mode->channels[idx].freq < 4000)
1357                                 if (mode->channels[idx].freq == 2848)
1358                                         mode->channels[idx].chan = 14;
1359                                 else
1360                                         mode->channels[idx].chan = (mode->channels[idx].freq - 2407) / 5;
1361                         else
1362                                 mode->channels[idx].chan = mode->channels[idx].freq/5 - 1000;
1363
1364                         if (tb_freq[NL80211_FREQUENCY_ATTR_DISABLED])
1365                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_SCAN;
1366                         if (tb_freq[NL80211_FREQUENCY_ATTR_PASSIVE_SCAN])
1367                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_ACTIVE_SCAN;
1368                         if (tb_freq[NL80211_FREQUENCY_ATTR_NO_IBSS])
1369                                 mode->channels[idx].flag &= ~HOSTAPD_CHAN_W_IBSS;
1370                         idx++;
1371                 }
1372
1373                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1374                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1375                                   nla_len(nl_rate), rate_policy);
1376                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1377                                 continue;
1378                         mode->num_rates++;
1379                 }
1380
1381                 mode->rates = calloc(mode->num_rates, sizeof(struct hostapd_rate_data));
1382                 if (!mode->rates)
1383                         return NL_SKIP;
1384
1385                 idx = 0;
1386
1387                 nla_for_each_nested(nl_rate, tb_band[NL80211_BAND_ATTR_RATES], rem_rate) {
1388                         nla_parse(tb_rate, NL80211_BITRATE_ATTR_MAX, nla_data(nl_rate),
1389                                   nla_len(nl_rate), rate_policy);
1390                         if (!tb_rate[NL80211_BITRATE_ATTR_RATE])
1391                                 continue;
1392                         mode->rates[idx].rate = nla_get_u32(tb_rate[NL80211_BITRATE_ATTR_RATE]);
1393
1394                         /* crude heuristic */
1395                         if (mode->mode == HOSTAPD_MODE_IEEE80211B &&
1396                             mode->rates[idx].rate > 200)
1397                                 mode->mode = HOSTAPD_MODE_IEEE80211G;
1398
1399                         if (tb_rate[NL80211_BITRATE_ATTR_2GHZ_SHORTPREAMBLE])
1400                                 mode->rates[idx].flags |= HOSTAPD_RATE_PREAMBLE2;
1401
1402                         idx++;
1403                 }
1404         }
1405
1406         phy_info->error = 0;
1407
1408         return NL_SKIP;
1409 }
1410
1411 static struct hostapd_hw_modes *i802_get_hw_feature_data(void *priv,
1412                                                          u16 *num_modes,
1413                                                          u16 *flags)
1414 {
1415         struct i802_driver_data *drv = priv;
1416         struct nl_msg *msg;
1417         int err = -1;
1418         struct nl_cb *cb = NULL;
1419         int finished;
1420         struct phy_info_arg result = {
1421                 .num_modes = num_modes,
1422                 .modes = NULL,
1423                 .error = 1,
1424         };
1425
1426         *num_modes = 0;
1427         *flags = 0;
1428
1429         msg = nlmsg_alloc();
1430         if (!msg)
1431                 return NULL;
1432
1433         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1434                     0, NL80211_CMD_GET_WIPHY, 0);
1435
1436         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX, if_nametoindex(drv->iface));
1437
1438         cb = nl_cb_clone(drv->nl_cb);
1439         if (!cb)
1440                 goto out;
1441
1442         if (nl_send_auto_complete(drv->nl_handle, msg) < 0)
1443                 goto out;
1444
1445         nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, phy_info_handler, &result);
1446         nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, ack_wait_handler, &finished);
1447
1448         err = nl_recvmsgs(drv->nl_handle, cb);
1449
1450         if (!finished)
1451                 err = nl_wait_for_ack(drv->nl_handle);
1452
1453         if (err < 0 || result.error) {
1454                 hostapd_free_hw_features(result.modes, *num_modes);
1455                 result.modes = NULL;
1456         }
1457
1458  out:
1459         nl_cb_put(cb);
1460  nla_put_failure:
1461         if (err)
1462                 fprintf(stderr, "failed to get information: %d\n", err);
1463         nlmsg_free(msg);
1464         return result.modes;
1465 }
1466
1467
1468 static int i802_set_sta_vlan(void *priv, const u8 *addr,
1469                              const char *ifname, int vlan_id)
1470 {
1471         struct i802_driver_data *drv = priv;
1472         struct nl_msg *msg;
1473         int ret = -1;
1474
1475         msg = nlmsg_alloc();
1476         if (!msg)
1477                 goto out;
1478
1479         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1480                     0, NL80211_CMD_SET_STATION, 0);
1481
1482         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1483                     if_nametoindex(drv->iface));
1484         NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, addr);
1485         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1486                     if_nametoindex(ifname));
1487
1488         ret = 0;
1489
1490         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1491             (errno = nl_wait_for_ack(drv->nl_handle) < 0)) {
1492                 ret = -1;
1493         }
1494
1495  nla_put_failure:
1496         nlmsg_free(msg);
1497
1498  out:
1499         return ret;
1500 }
1501
1502
1503 static void handle_unknown_sta(struct hostapd_data *hapd, u8 *ta)
1504 {
1505         struct sta_info *sta;
1506
1507         sta = ap_get_sta(hapd, ta);
1508         if (!sta || !(sta->flags & WLAN_STA_ASSOC)) {
1509                 printf("Data/PS-poll frame from not associated STA "
1510                        MACSTR "\n", MAC2STR(ta));
1511                 if (sta && (sta->flags & WLAN_STA_AUTH))
1512                         hostapd_sta_disassoc(
1513                                 hapd, ta,
1514                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1515                 else
1516                         hostapd_sta_deauth(
1517                                 hapd, ta,
1518                                 WLAN_REASON_CLASS3_FRAME_FROM_NONASSOC_STA);
1519         }
1520 }
1521
1522
1523 static void handle_tx_callback(struct hostapd_data *hapd, u8 *buf, size_t len,
1524                                int ok)
1525 {
1526         struct ieee80211_hdr *hdr;
1527         u16 fc, type, stype;
1528         struct sta_info *sta;
1529
1530         hdr = (struct ieee80211_hdr *) buf;
1531         fc = le_to_host16(hdr->frame_control);
1532
1533         type = WLAN_FC_GET_TYPE(fc);
1534         stype = WLAN_FC_GET_STYPE(fc);
1535
1536         switch (type) {
1537         case WLAN_FC_TYPE_MGMT:
1538                 wpa_printf(MSG_DEBUG, "MGMT (TX callback) %s",
1539                            ok ? "ACK" : "fail");
1540                 ieee802_11_mgmt_cb(hapd, buf, len, stype, ok);
1541                 break;
1542         case WLAN_FC_TYPE_CTRL:
1543                 wpa_printf(MSG_DEBUG, "CTRL (TX callback) %s",
1544                            ok ? "ACK" : "fail");
1545                 break;
1546         case WLAN_FC_TYPE_DATA:
1547                 wpa_printf(MSG_DEBUG, "DATA (TX callback) %s",
1548                            ok ? "ACK" : "fail");
1549                 sta = ap_get_sta(hapd, hdr->addr1);
1550                 if (sta && sta->flags & WLAN_STA_PENDING_POLL) {
1551                         wpa_printf(MSG_DEBUG, "STA " MACSTR " %s pending "
1552                                    "activity poll", MAC2STR(sta->addr),
1553                                    ok ? "ACKed" : "did not ACK");
1554                         if (ok)
1555                                 sta->flags &= ~WLAN_STA_PENDING_POLL;
1556                 }
1557                 if (sta)
1558                         ieee802_1x_tx_status(hapd, sta, buf, len, ok);
1559                 break;
1560         default:
1561                 printf("unknown TX callback frame type %d\n", type);
1562                 break;
1563         }
1564 }
1565
1566
1567 static void handle_frame(struct hostapd_iface *iface, u8 *buf, size_t len,
1568                          struct hostapd_frame_info *hfi,
1569                          enum ieee80211_msg_type msg_type)
1570 {
1571         struct ieee80211_hdr *hdr;
1572         u16 fc, type, stype;
1573         size_t data_len = len;
1574         struct hostapd_data *hapd = NULL;
1575         int broadcast_bssid = 0;
1576         size_t i;
1577         u8 *bssid;
1578
1579         /*
1580          * PS-Poll frames are 16 bytes. All other frames are
1581          * 24 bytes or longer.
1582          */
1583         if (len < 16)
1584                 return;
1585
1586         hdr = (struct ieee80211_hdr *) buf;
1587         fc = le_to_host16(hdr->frame_control);
1588
1589         type = WLAN_FC_GET_TYPE(fc);
1590         stype = WLAN_FC_GET_STYPE(fc);
1591
1592         switch (type) {
1593         case WLAN_FC_TYPE_DATA:
1594                 if (len < 24)
1595                         return;
1596                 switch (fc & (WLAN_FC_FROMDS | WLAN_FC_TODS)) {
1597                 case WLAN_FC_TODS:
1598                         bssid = hdr->addr1;
1599                         break;
1600                 default:
1601                         /* discard */
1602                         return;
1603                 }
1604                 break;
1605         case WLAN_FC_TYPE_CTRL:
1606                 /* discard non-ps-poll frames */
1607                 if (stype != WLAN_FC_STYPE_PSPOLL)
1608                         return;
1609                 bssid = hdr->addr1;
1610                 break;
1611         case WLAN_FC_TYPE_MGMT:
1612                 bssid = hdr->addr3;
1613                 break;
1614         default:
1615                 /* discard */
1616                 return;
1617         }
1618
1619         /* find interface frame belongs to */
1620         for (i = 0; i < iface->num_bss; i++) {
1621                 if (memcmp(bssid, iface->bss[i]->own_addr, ETH_ALEN) == 0) {
1622                         hapd = iface->bss[i];
1623                         break;
1624                 }
1625         }
1626
1627         if (hapd == NULL) {
1628                 hapd = iface->bss[0];
1629
1630                 if (bssid[0] != 0xff || bssid[1] != 0xff ||
1631                     bssid[2] != 0xff || bssid[3] != 0xff ||
1632                     bssid[4] != 0xff || bssid[5] != 0xff) {
1633                         /*
1634                          * Unknown BSSID - drop frame if this is not from
1635                          * passive scanning or a beacon (at least ProbeReq
1636                          * frames to other APs may be allowed through RX
1637                          * filtering in the wlan hw/driver)
1638                          */
1639                         if ((type != WLAN_FC_TYPE_MGMT ||
1640                              stype != WLAN_FC_STYPE_BEACON))
1641                                 return;
1642                 } else
1643                         broadcast_bssid = 1;
1644         }
1645
1646         switch (msg_type) {
1647         case ieee80211_msg_normal:
1648                 /* continue processing */
1649                 break;
1650         case ieee80211_msg_tx_callback_ack:
1651                 handle_tx_callback(hapd, buf, data_len, 1);
1652                 return;
1653         case ieee80211_msg_tx_callback_fail:
1654                 handle_tx_callback(hapd, buf, data_len, 0);
1655                 return;
1656         }
1657
1658         switch (type) {
1659         case WLAN_FC_TYPE_MGMT:
1660                 if (stype != WLAN_FC_STYPE_BEACON &&
1661                     stype != WLAN_FC_STYPE_PROBE_REQ)
1662                         wpa_printf(MSG_MSGDUMP, "MGMT");
1663                 if (broadcast_bssid) {
1664                         for (i = 0; i < iface->num_bss; i++)
1665                                 ieee802_11_mgmt(iface->bss[i], buf, data_len,
1666                                                 stype, hfi);
1667                 } else
1668                         ieee802_11_mgmt(hapd, buf, data_len, stype, hfi);
1669                 break;
1670         case WLAN_FC_TYPE_CTRL:
1671                 /* can only get here with PS-Poll frames */
1672                 wpa_printf(MSG_DEBUG, "CTRL");
1673                 handle_unknown_sta(hapd, hdr->addr2);
1674                 break;
1675         case WLAN_FC_TYPE_DATA:
1676                 wpa_printf(MSG_DEBUG, "DATA");
1677                 handle_unknown_sta(hapd, hdr->addr2);
1678                 break;
1679         }
1680 }
1681
1682
1683 static void handle_eapol(int sock, void *eloop_ctx, void *sock_ctx)
1684 {
1685         struct i802_driver_data *drv = eloop_ctx;
1686         struct hostapd_data *hapd = drv->hapd;
1687         struct sockaddr_ll lladdr;
1688         unsigned char buf[3000];
1689         int len;
1690         socklen_t fromlen = sizeof(lladdr);
1691
1692         len = recvfrom(sock, buf, sizeof(buf), 0,
1693                        (struct sockaddr *)&lladdr, &fromlen);
1694         if (len < 0) {
1695                 perror("recv");
1696                 return;
1697         }
1698
1699         if (have_ifidx(drv, lladdr.sll_ifindex))
1700                 ieee802_1x_receive(hapd, lladdr.sll_addr, buf, len);
1701 }
1702
1703
1704 static void handle_monitor_read(int sock, void *eloop_ctx, void *sock_ctx)
1705 {
1706         struct i802_driver_data *drv = eloop_ctx;
1707         int len;
1708         unsigned char buf[3000];
1709         struct hostapd_data *hapd = drv->hapd;
1710         struct ieee80211_radiotap_iterator iter;
1711         int ret;
1712         struct hostapd_frame_info hfi;
1713         int injected = 0, failed = 0, msg_type, rxflags = 0;
1714
1715         len = recv(sock, buf, sizeof(buf), 0);
1716         if (len < 0) {
1717                 perror("recv");
1718                 return;
1719         }
1720
1721         if (ieee80211_radiotap_iterator_init(&iter, (void*)buf, len)) {
1722                 printf("received invalid radiotap frame\n");
1723                 return;
1724         }
1725
1726         memset(&hfi, 0, sizeof(hfi));
1727
1728         while (1) {
1729                 ret = ieee80211_radiotap_iterator_next(&iter);
1730                 if (ret == -ENOENT)
1731                         break;
1732                 if (ret) {
1733                         printf("received invalid radiotap frame (%d)\n", ret);
1734                         return;
1735                 }
1736                 switch (iter.this_arg_index) {
1737                 case IEEE80211_RADIOTAP_FLAGS:
1738                         if (*iter.this_arg & IEEE80211_RADIOTAP_F_FCS)
1739                                 len -= 4;
1740                         break;
1741                 case IEEE80211_RADIOTAP_RX_FLAGS:
1742                         rxflags = 1;
1743                         break;
1744                 case IEEE80211_RADIOTAP_TX_FLAGS:
1745                         injected = 1;
1746                         failed = le_to_host16((*(uint16_t *) iter.this_arg)) &
1747                                         IEEE80211_RADIOTAP_F_TX_FAIL;
1748                         break;
1749                 case IEEE80211_RADIOTAP_DATA_RETRIES:
1750                         break;
1751                 case IEEE80211_RADIOTAP_CHANNEL:
1752                         /* TODO convert from freq/flags to channel number
1753                         hfi.channel = XXX;
1754                         hfi.phytype = XXX;
1755                          */
1756                         break;
1757                 case IEEE80211_RADIOTAP_RATE:
1758                         hfi.datarate = *iter.this_arg * 5;
1759                         break;
1760                 case IEEE80211_RADIOTAP_DB_ANTSIGNAL:
1761                         hfi.ssi_signal = *iter.this_arg;
1762                         break;
1763                 }
1764         }
1765
1766         if (rxflags && injected)
1767                 return;
1768
1769         if (!injected)
1770                 msg_type = ieee80211_msg_normal;
1771         else if (failed)
1772                 msg_type = ieee80211_msg_tx_callback_fail;
1773         else
1774                 msg_type = ieee80211_msg_tx_callback_ack;
1775
1776         handle_frame(hapd->iface, buf + iter.max_length,
1777                      len - iter.max_length, &hfi, msg_type);
1778 }
1779
1780
1781 static int nl80211_create_monitor_interface(struct i802_driver_data *drv)
1782 {
1783         char buf[IFNAMSIZ];
1784         struct sockaddr_ll ll;
1785         int optval;
1786         socklen_t optlen;
1787
1788         snprintf(buf, IFNAMSIZ, "mon.%s", drv->iface);
1789         buf[IFNAMSIZ - 1] = '\0';
1790
1791         drv->monitor_ifidx =
1792                 nl80211_create_iface(drv, buf, NL80211_IFTYPE_MONITOR, NULL);
1793
1794         if (drv->monitor_ifidx < 0)
1795                 return -1;
1796
1797         if (hostapd_set_iface_flags(drv, buf, 1))
1798                 goto error;
1799
1800         memset(&ll, 0, sizeof(ll));
1801         ll.sll_family = AF_PACKET;
1802         ll.sll_ifindex = drv->monitor_ifidx;
1803         drv->monitor_sock = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_ALL));
1804         if (drv->monitor_sock < 0) {
1805                 perror("socket[PF_PACKET,SOCK_RAW]");
1806                 goto error;
1807         }
1808
1809         if (bind(drv->monitor_sock, (struct sockaddr *) &ll,
1810                  sizeof(ll)) < 0) {
1811                 perror("monitor socket bind");
1812                 goto error;
1813         }
1814
1815         optlen = sizeof(optval);
1816         optval = 20;
1817         if (setsockopt
1818             (drv->monitor_sock, SOL_SOCKET, SO_PRIORITY, &optval, optlen)) {
1819                 perror("Failed to set socket priority");
1820                 goto error;
1821         }
1822
1823         if (eloop_register_read_sock(drv->monitor_sock, handle_monitor_read,
1824                                      drv, NULL)) {
1825                 printf("Could not register monitor read socket\n");
1826                 goto error;
1827         }
1828
1829         return 0;
1830  error:
1831         nl80211_remove_iface(drv, drv->monitor_ifidx);
1832         return -1;
1833 }
1834
1835
1836 static int nl80211_set_master_mode(struct i802_driver_data *drv,
1837                                    const char *ifname)
1838 {
1839         struct nl_msg *msg;
1840
1841         msg = nlmsg_alloc();
1842         if (!msg)
1843                 return -1;
1844
1845         genlmsg_put(msg, 0, 0, genl_family_get_id(drv->nl80211), 0,
1846                     0, NL80211_CMD_SET_INTERFACE, 0);
1847         NLA_PUT_U32(msg, NL80211_ATTR_IFINDEX,
1848                     if_nametoindex(ifname));
1849         NLA_PUT_U32(msg, NL80211_ATTR_IFTYPE, NL80211_IFTYPE_AP);
1850
1851         if (nl_send_auto_complete(drv->nl_handle, msg) < 0 ||
1852             nl_wait_for_ack(drv->nl_handle) < 0) {
1853  nla_put_failure:
1854                 wpa_printf(MSG_ERROR, "Failed to set interface %s to master "
1855                            "mode.", ifname);
1856                 nlmsg_free(msg);
1857                 return -1;
1858         }
1859
1860         nlmsg_free(msg);
1861
1862         return 0;
1863 }
1864
1865
1866 static int i802_init_sockets(struct i802_driver_data *drv, const u8 *bssid)
1867 {
1868         struct ifreq ifr;
1869         struct sockaddr_ll addr;
1870
1871         drv->ioctl_sock = -1;
1872
1873         drv->ioctl_sock = socket(PF_INET, SOCK_DGRAM, 0);
1874         if (drv->ioctl_sock < 0) {
1875                 perror("socket[PF_INET,SOCK_DGRAM]");
1876                 return -1;
1877         }
1878
1879         /* start listening for EAPOL on the default AP interface */
1880         add_ifidx(drv, if_nametoindex(drv->iface));
1881
1882         if (hostapd_set_iface_flags(drv, drv->iface, 0))
1883                 return -1;
1884
1885         if (bssid) {
1886                 os_strlcpy(ifr.ifr_name, drv->iface, IFNAMSIZ);
1887                 memcpy(ifr.ifr_hwaddr.sa_data, bssid, ETH_ALEN);
1888                 ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
1889
1890                 if (ioctl(drv->ioctl_sock, SIOCSIFHWADDR, &ifr)) {
1891                         perror("ioctl(SIOCSIFHWADDR)");
1892                         return -1;
1893                 }
1894         }
1895
1896         /*
1897          * initialise generic netlink and nl80211
1898          */
1899         drv->nl_cb = nl_cb_alloc(NL_CB_DEFAULT);
1900         if (!drv->nl_cb) {
1901                 printf("Failed to allocate netlink callbacks.\n");
1902                 return -1;
1903         }
1904
1905         drv->nl_handle = nl_handle_alloc_cb(drv->nl_cb);
1906         if (!drv->nl_handle) {
1907                 printf("Failed to allocate netlink handle.\n");
1908                 return -1;
1909         }
1910
1911         if (genl_connect(drv->nl_handle)) {
1912                 printf("Failed to connect to generic netlink.\n");
1913                 return -1;
1914         }
1915
1916         drv->nl_cache = genl_ctrl_alloc_cache(drv->nl_handle);
1917         if (!drv->nl_cache) {
1918                 printf("Failed to allocate generic netlink cache.\n");
1919                 return -1;
1920         }
1921
1922         drv->nl80211 = genl_ctrl_search_by_name(drv->nl_cache, "nl80211");
1923         if (!drv->nl80211) {
1924                 printf("nl80211 not found.\n");
1925                 return -1;
1926         }
1927
1928         /* Initialise a monitor interface */
1929         if (nl80211_create_monitor_interface(drv))
1930                 return -1;
1931
1932         if (nl80211_set_master_mode(drv, drv->iface))
1933                 return -1;
1934
1935         if (hostapd_set_iface_flags(drv, drv->iface, 1))
1936                 return -1;
1937
1938         memset(&addr, 0, sizeof(addr));
1939         addr.sll_family = AF_PACKET;
1940         addr.sll_ifindex = ifr.ifr_ifindex;
1941         wpa_printf(MSG_DEBUG, "Opening raw packet socket for ifindex %d",
1942                    addr.sll_ifindex);
1943
1944         drv->eapol_sock = socket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_PAE));
1945         if (drv->eapol_sock < 0) {
1946                 perror("socket(PF_PACKET, SOCK_DGRAM, ETH_P_PAE)");
1947                 return -1;
1948         }
1949
1950         if (eloop_register_read_sock(drv->eapol_sock, handle_eapol, drv, NULL))
1951         {
1952                 printf("Could not register read socket for eapol\n");
1953                 return -1;
1954         }
1955
1956         memset(&ifr, 0, sizeof(ifr));
1957         os_strlcpy(ifr.ifr_name, drv->iface, sizeof(ifr.ifr_name));
1958         if (ioctl(drv->ioctl_sock, SIOCGIFHWADDR, &ifr) != 0) {
1959                 perror("ioctl(SIOCGIFHWADDR)");
1960                 return -1;
1961         }
1962
1963         if (ifr.ifr_hwaddr.sa_family != ARPHRD_ETHER) {
1964                 printf("Invalid HW-addr family 0x%04x\n",
1965                        ifr.ifr_hwaddr.sa_family);
1966                 return -1;
1967         }
1968         memcpy(drv->hapd->own_addr, ifr.ifr_hwaddr.sa_data, ETH_ALEN);
1969
1970         return 0;
1971 }
1972
1973
1974 static int i802_get_inact_sec(void *priv, const u8 *addr)
1975 {
1976         struct hostap_sta_driver_data data;
1977         int ret;
1978
1979         data.inactive_msec = (unsigned long) -1;
1980         ret = i802_read_sta_data(priv, &data, addr);
1981         if (ret || data.inactive_msec == (unsigned long) -1)
1982                 return -1;
1983         return data.inactive_msec / 1000;
1984 }
1985
1986
1987 static int i802_sta_clear_stats(void *priv, const u8 *addr)
1988 {
1989 #if 0
1990         /* TODO */
1991 #endif
1992         return 0;
1993 }
1994
1995
1996 static void
1997 hostapd_wireless_event_wireless_custom(struct i802_driver_data *drv,
1998                                        char *custom)
1999 {
2000         wpa_printf(MSG_DEBUG, "Custom wireless event: '%s'", custom);
2001
2002         if (strncmp(custom, "MLME-MICHAELMICFAILURE.indication", 33) == 0) {
2003                 char *pos;
2004                 u8 addr[ETH_ALEN];
2005                 pos = strstr(custom, "addr=");
2006                 if (pos == NULL) {
2007                         wpa_printf(MSG_DEBUG,
2008                                    "MLME-MICHAELMICFAILURE.indication "
2009                                    "without sender address ignored");
2010                         return;
2011                 }
2012                 pos += 5;
2013                 if (hwaddr_aton(pos, addr) == 0) {
2014                         ieee80211_michael_mic_failure(drv->hapd, addr, 1);
2015                 } else {
2016                         wpa_printf(MSG_DEBUG,
2017                                    "MLME-MICHAELMICFAILURE.indication "
2018                                    "with invalid MAC address");
2019                 }
2020         }
2021 }
2022
2023
2024 static void hostapd_wireless_event_wireless(struct i802_driver_data *drv,
2025                                             char *data, int len)
2026 {
2027         struct iw_event iwe_buf, *iwe = &iwe_buf;
2028         char *pos, *end, *custom, *buf;
2029
2030         pos = data;
2031         end = data + len;
2032
2033         while (pos + IW_EV_LCP_LEN <= end) {
2034                 /* Event data may be unaligned, so make a local, aligned copy
2035                  * before processing. */
2036                 memcpy(&iwe_buf, pos, IW_EV_LCP_LEN);
2037                 wpa_printf(MSG_DEBUG, "Wireless event: cmd=0x%x len=%d",
2038                            iwe->cmd, iwe->len);
2039                 if (iwe->len <= IW_EV_LCP_LEN)
2040                         return;
2041
2042                 custom = pos + IW_EV_POINT_LEN;
2043                 if (drv->we_version > 18 &&
2044                     (iwe->cmd == IWEVMICHAELMICFAILURE ||
2045                      iwe->cmd == IWEVCUSTOM)) {
2046                         /* WE-19 removed the pointer from struct iw_point */
2047                         char *dpos = (char *) &iwe_buf.u.data.length;
2048                         int dlen = dpos - (char *) &iwe_buf;
2049                         memcpy(dpos, pos + IW_EV_LCP_LEN,
2050                                sizeof(struct iw_event) - dlen);
2051                 } else {
2052                         memcpy(&iwe_buf, pos, sizeof(struct iw_event));
2053                         custom += IW_EV_POINT_OFF;
2054                 }
2055
2056                 switch (iwe->cmd) {
2057                 case IWEVCUSTOM:
2058                         if (custom + iwe->u.data.length > end)
2059                                 return;
2060                         buf = malloc(iwe->u.data.length + 1);
2061                         if (buf == NULL)
2062                                 return;
2063                         memcpy(buf, custom, iwe->u.data.length);
2064                         buf[iwe->u.data.length] = '\0';
2065                         hostapd_wireless_event_wireless_custom(drv, buf);
2066                         free(buf);
2067                         break;
2068                 }
2069
2070                 pos += iwe->len;
2071         }
2072 }
2073
2074
2075 static void hostapd_wireless_event_rtm_newlink(struct i802_driver_data *drv,
2076                                                struct nlmsghdr *h, int len)
2077 {
2078         struct ifinfomsg *ifi;
2079         int attrlen, nlmsg_len, rta_len;
2080         struct rtattr *attr;
2081
2082         if (len < (int) sizeof(*ifi))
2083                 return;
2084
2085         ifi = NLMSG_DATA(h);
2086
2087         /* TODO: use ifi->ifi_index to filter out wireless events from other
2088          * interfaces */
2089
2090         nlmsg_len = NLMSG_ALIGN(sizeof(struct ifinfomsg));
2091
2092         attrlen = h->nlmsg_len - nlmsg_len;
2093         if (attrlen < 0)
2094                 return;
2095
2096         attr = (struct rtattr *) (((char *) ifi) + nlmsg_len);
2097
2098         rta_len = RTA_ALIGN(sizeof(struct rtattr));
2099         while (RTA_OK(attr, attrlen)) {
2100                 if (attr->rta_type == IFLA_WIRELESS) {
2101                         hostapd_wireless_event_wireless(
2102                                 drv, ((char *) attr) + rta_len,
2103                                 attr->rta_len - rta_len);
2104                 }
2105                 attr = RTA_NEXT(attr, attrlen);
2106         }
2107 }
2108
2109
2110 static void hostapd_wireless_event_receive(int sock, void *eloop_ctx,
2111                                            void *sock_ctx)
2112 {
2113         char buf[256];
2114         int left;
2115         struct sockaddr_nl from;
2116         socklen_t fromlen;
2117         struct nlmsghdr *h;
2118         struct i802_driver_data *drv = eloop_ctx;
2119
2120         fromlen = sizeof(from);
2121         left = recvfrom(sock, buf, sizeof(buf), MSG_DONTWAIT,
2122                         (struct sockaddr *) &from, &fromlen);
2123         if (left < 0) {
2124                 if (errno != EINTR && errno != EAGAIN)
2125                         perror("recvfrom(netlink)");
2126                 return;
2127         }
2128
2129         h = (struct nlmsghdr *) buf;
2130         while (left >= (int) sizeof(*h)) {
2131                 int len, plen;
2132
2133                 len = h->nlmsg_len;
2134                 plen = len - sizeof(*h);
2135                 if (len > left || plen < 0) {
2136                         printf("Malformed netlink message: "
2137                                "len=%d left=%d plen=%d\n",
2138                                len, left, plen);
2139                         break;
2140                 }
2141
2142                 switch (h->nlmsg_type) {
2143                 case RTM_NEWLINK:
2144                         hostapd_wireless_event_rtm_newlink(drv, h, plen);
2145                         break;
2146                 }
2147
2148                 len = NLMSG_ALIGN(len);
2149                 left -= len;
2150                 h = (struct nlmsghdr *) ((char *) h + len);
2151         }
2152
2153         if (left > 0) {
2154                 printf("%d extra bytes in the end of netlink message\n", left);
2155         }
2156 }
2157
2158
2159 static int hostap_get_we_version(struct i802_driver_data *drv)
2160 {
2161         struct iw_range *range;
2162         struct iwreq iwr;
2163         int minlen;
2164         size_t buflen;
2165
2166         drv->we_version = 0;
2167
2168         /*
2169          * Use larger buffer than struct iw_range in order to allow the
2170          * structure to grow in the future.
2171          */
2172         buflen = sizeof(struct iw_range) + 500;
2173         range = os_zalloc(buflen);
2174         if (range == NULL)
2175                 return -1;
2176
2177         memset(&iwr, 0, sizeof(iwr));
2178         os_strlcpy(iwr.ifr_name, drv->iface, IFNAMSIZ);
2179         iwr.u.data.pointer = (caddr_t) range;
2180         iwr.u.data.length = buflen;
2181
2182         minlen = ((char *) &range->enc_capa) - (char *) range +
2183                 sizeof(range->enc_capa);
2184
2185         if (ioctl(drv->ioctl_sock, SIOCGIWRANGE, &iwr) < 0) {
2186                 perror("ioctl[SIOCGIWRANGE]");
2187                 free(range);
2188                 return -1;
2189         } else if (iwr.u.data.length >= minlen &&
2190                    range->we_version_compiled >= 18) {
2191                 wpa_printf(MSG_DEBUG, "SIOCGIWRANGE: WE(compiled)=%d "
2192                            "WE(source)=%d enc_capa=0x%x",
2193                            range->we_version_compiled,
2194                            range->we_version_source,
2195                            range->enc_capa);
2196                 drv->we_version = range->we_version_compiled;
2197         }
2198
2199         free(range);
2200         return 0;
2201 }
2202
2203
2204 static int i802_wireless_event_init(void *priv)
2205 {
2206         struct i802_driver_data *drv = priv;
2207         int s;
2208         struct sockaddr_nl local;
2209
2210         hostap_get_we_version(drv);
2211
2212         drv->wext_sock = -1;
2213
2214         s = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
2215         if (s < 0) {
2216                 perror("socket(PF_NETLINK,SOCK_RAW,NETLINK_ROUTE)");
2217                 return -1;
2218         }
2219
2220         memset(&local, 0, sizeof(local));
2221         local.nl_family = AF_NETLINK;
2222         local.nl_groups = RTMGRP_LINK;
2223         if (bind(s, (struct sockaddr *) &local, sizeof(local)) < 0) {
2224                 perror("bind(netlink)");
2225                 close(s);
2226                 return -1;
2227         }
2228
2229         eloop_register_read_sock(s, hostapd_wireless_event_receive, drv,
2230                                  NULL);
2231         drv->wext_sock = s;
2232
2233         return 0;
2234 }
2235
2236
2237 static void i802_wireless_event_deinit(void *priv)
2238 {
2239         struct i802_driver_data *drv = priv;
2240         if (drv->wext_sock < 0)
2241                 return;
2242         eloop_unregister_read_sock(drv->wext_sock);
2243         close(drv->wext_sock);
2244 }
2245
2246
2247 static int i802_sta_deauth(void *priv, const u8 *addr, int reason)
2248 {
2249         struct i802_driver_data *drv = priv;
2250         struct ieee80211_mgmt mgmt;
2251
2252         memset(&mgmt, 0, sizeof(mgmt));
2253         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2254                                           WLAN_FC_STYPE_DEAUTH);
2255         memcpy(mgmt.da, addr, ETH_ALEN);
2256         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2257         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2258         mgmt.u.deauth.reason_code = host_to_le16(reason);
2259         return i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2260                                       sizeof(mgmt.u.deauth), 0);
2261 }
2262
2263
2264 static int i802_sta_disassoc(void *priv, const u8 *addr, int reason)
2265 {
2266         struct i802_driver_data *drv = priv;
2267         struct ieee80211_mgmt mgmt;
2268
2269         memset(&mgmt, 0, sizeof(mgmt));
2270         mgmt.frame_control = IEEE80211_FC(WLAN_FC_TYPE_MGMT,
2271                                           WLAN_FC_STYPE_DISASSOC);
2272         memcpy(mgmt.da, addr, ETH_ALEN);
2273         memcpy(mgmt.sa, drv->hapd->own_addr, ETH_ALEN);
2274         memcpy(mgmt.bssid, drv->hapd->own_addr, ETH_ALEN);
2275         mgmt.u.disassoc.reason_code = host_to_le16(reason);
2276         return  i802_send_mgmt_frame(drv, &mgmt, IEEE80211_HDRLEN +
2277                                        sizeof(mgmt.u.disassoc), 0);
2278 }
2279
2280
2281 static void *i802_init_bssid(struct hostapd_data *hapd, const u8 *bssid)
2282 {
2283         struct i802_driver_data *drv;
2284
2285         drv = os_zalloc(sizeof(struct i802_driver_data));
2286         if (drv == NULL) {
2287                 printf("Could not allocate memory for i802 driver data\n");
2288                 return NULL;
2289         }
2290
2291         drv->hapd = hapd;
2292         memcpy(drv->iface, hapd->conf->iface, sizeof(drv->iface));
2293
2294         drv->num_if_indices = sizeof(drv->default_if_indices) / sizeof(int);
2295         drv->if_indices = drv->default_if_indices;
2296         drv->bridge = if_nametoindex(hapd->conf->bridge);
2297
2298         if (i802_init_sockets(drv, bssid))
2299                 goto failed;
2300
2301         return drv;
2302
2303 failed:
2304         free(drv);
2305         return NULL;
2306 }
2307
2308
2309 static void *i802_init(struct hostapd_data *hapd)
2310 {
2311         return i802_init_bssid(hapd, NULL);
2312 }
2313
2314
2315 static void i802_deinit(void *priv)
2316 {
2317         struct i802_driver_data *drv = priv;
2318
2319         i802_del_beacon(drv);
2320
2321         /* remove monitor interface */
2322         nl80211_remove_iface(drv, drv->monitor_ifidx);
2323
2324         (void) hostapd_set_iface_flags(drv, drv->iface, 0);
2325
2326         if (drv->monitor_sock >= 0) {
2327                 eloop_unregister_read_sock(drv->monitor_sock);
2328                 close(drv->monitor_sock);
2329         }
2330         if (drv->ioctl_sock >= 0)
2331                 close(drv->ioctl_sock);
2332         if (drv->eapol_sock >= 0) {
2333                 eloop_unregister_read_sock(drv->eapol_sock);
2334                 close(drv->eapol_sock);
2335         }
2336
2337         genl_family_put(drv->nl80211);
2338         nl_cache_free(drv->nl_cache);
2339         nl_handle_destroy(drv->nl_handle);
2340         nl_cb_put(drv->nl_cb);
2341
2342         if (drv->if_indices != drv->default_if_indices)
2343                 free(drv->if_indices);
2344
2345         free(drv);
2346 }
2347
2348
2349 const struct wpa_driver_ops wpa_driver_nl80211_ops = {
2350         .name = "nl80211",
2351         .init = i802_init,
2352         .init_bssid = i802_init_bssid,
2353         .deinit = i802_deinit,
2354         .wireless_event_init = i802_wireless_event_init,
2355         .wireless_event_deinit = i802_wireless_event_deinit,
2356         .set_ieee8021x = i802_set_ieee8021x,
2357         .set_privacy = i802_set_privacy,
2358         .set_encryption = i802_set_encryption,
2359         .get_seqnum = i802_get_seqnum,
2360         .flush = i802_flush,
2361         .read_sta_data = i802_read_sta_data,
2362         .send_eapol = i802_send_eapol,
2363         .sta_set_flags = i802_sta_set_flags,
2364         .sta_deauth = i802_sta_deauth,
2365         .sta_disassoc = i802_sta_disassoc,
2366         .sta_remove = i802_sta_remove,
2367         .set_ssid = i802_set_ssid,
2368         .send_mgmt_frame = i802_send_mgmt_frame,
2369         .sta_add = i802_sta_add,
2370         .get_inact_sec = i802_get_inact_sec,
2371         .sta_clear_stats = i802_sta_clear_stats,
2372         .set_freq = i802_set_freq,
2373         .set_rts = i802_set_rts,
2374         .get_rts = i802_get_rts,
2375         .set_frag = i802_set_frag,
2376         .get_frag = i802_get_frag,
2377         .set_retry = i802_set_retry,
2378         .get_retry = i802_get_retry,
2379         .set_rate_sets = i802_set_rate_sets,
2380         .set_channel_flag = i802_set_channel_flag,
2381         .set_regulatory_domain = i802_set_regulatory_domain,
2382         .set_beacon = i802_set_beacon,
2383         .set_internal_bridge = i802_set_internal_bridge,
2384         .set_beacon_int = i802_set_beacon_int,
2385         .set_dtim_period = i802_set_dtim_period,
2386         .set_cts_protect = i802_set_cts_protect,
2387         .set_preamble = i802_set_preamble,
2388         .set_short_slot_time = i802_set_short_slot_time,
2389         .set_tx_queue_params = i802_set_tx_queue_params,
2390         .bss_add = i802_bss_add,
2391         .bss_remove = i802_bss_remove,
2392         .if_add = i802_if_add,
2393         .if_update = i802_if_update,
2394         .if_remove = i802_if_remove,
2395         .get_hw_feature_data = i802_get_hw_feature_data,
2396         .set_sta_vlan = i802_set_sta_vlan,
2397 };